CN116099668A - Centrifugal machine - Google Patents

Abstract

The invention relates to a centrifuge, which includes a main body of equipment; the main body of the equipment includes a rotor and a drive motor that drives the rotor to rotate; the rotor includes a rotating shaft connected to the drive motor, a tube barrel for containing test tubes, and A bracket between the tube barrel and the rotating shaft; the bracket includes a plurality of suspension mechanisms evenly distributed around the rotating shaft; the tube barrel is installed between two suspension mechanisms; the suspension mechanism can adjust the tube barrel and the rotating shaft The distance between; the bracket also includes an adjustment mechanism for adjusting the inclination angle of the tube barrel. In the actual implementation process, the centrifuge can adjust the distance between the tubes and barrels by adjusting the telescopic length of the telescopic frame, and at the same time, the tilt angle of the tubes and barrels can be adjusted through the adjustment mechanism, so that the centrifugal force of the tubes and barrels can be precisely adjusted under the condition that the driving motor rotates at a constant speed. The centrifuge relies on high-precision drive motors, thereby reducing the cost of the centrifuge.

Description

a centrifuge

technical field

The invention relates to the technical field of centrifugal separation, in particular to a centrifuge.

Background technique

Biochemical experiments are experiments on the chemical changes of substances in living organisms; existing biochemical experiments usually require the use of centrifugal equipment to separate biological samples; however, in biochemical experiments, the centrifugal force of the centrifuge has extremely strict requirements; existing laboratories The centrifuge in the centrifuge usually realizes the adjustment of the centrifugal force by adjusting the speed, so that the adjustment of the centrifugal force is closely related to the speed of the motor and the power of the motor. Specifically, the upper limit of the rotational speed limits the upper limit of the centrifugal force. If you want to separate smaller substances, you need to use a centrifuge with a higher rotational speed motor. The main disadvantage of this adjustment method is that the greater the adjustable rotational speed range of the motor, The higher the speed adjustment accuracy, the higher the cost of the motor, which ultimately leads to high cost of centrifugal equipment and increases the cost of laboratory operation.

Contents of the invention

(1) Technical problems to be solved

In order to solve the above problems in the prior art, the present invention provides a centrifuge that can precisely adjust the centrifugal force at a constant motor speed to separate biological samples, improve the accuracy of biochemical experiments, and reduce the production cost of centrifugal equipment.

(2) Technical solutions

In order to achieve the above object, the main technical solutions adopted in the present invention include:

A centrifuge, comprising a device body; the device body includes a rotor and a drive motor that drives the rotor to rotate; the rotor includes a rotating shaft connected to the drive motor, a tube barrel for containing test tubes, and a tube barrel connected to the tube barrel and A bracket between the rotating shafts; the bracket includes a plurality of suspension mechanisms evenly distributed around the rotating shaft; the pipe barrel is installed between the two suspension mechanisms; the suspension mechanism can adjust the distance between the pipe barrel and the rotating shaft distance; the bracket also includes an adjustment mechanism for adjusting the angle of inclination of the pipe barrel and a shaft sleeve fixedly connected with the rotating shaft; the suspension mechanism includes an arc-shaped arm connected with the pipe barrel and an The telescopic frame between them; the arc arm includes an arc rod, a connection section connected to both ends of the arc rod and an angle fixing assembly; the connection section is connected with a tube and barrel ball; It consists of adjacent arc arms; the adjustment mechanism includes a connecting section of one arc arm and an angle fixing component of the other arc arm.

The angle fixing assembly includes a slide bar that is slidably connected to the arc bar and a pretensioner connected between the slide bar and the arc bar; The abutment section; the abutment section includes a gear tooth portion; the tube barrel has a first tooth groove matched with the gear tooth portion.

The arc-shaped rod includes a chute matched with the slide bar; the connecting section can extend into the chute; the pre-tightening part includes a first pressure spring abutting against the bottom of the chute and the connecting section.

The arc rod also includes a long hole on its circumferential surface; the long hole communicates with the chute; the angle fixing assembly also includes a limit stop that can extend into the chute from the long hole block; the limit block includes a connection portion connected to the connection section and a snap-in portion stuck at the elongated hole.

The telescopic frame includes an internally threaded sleeve that is rotatably connected to the side wall of the shaft sleeve and a telescopic rod that is threadedly connected with the internally threaded sleeve; the internally threaded sleeve includes a threaded hole that matches the telescopic rod; the telescopic rod includes a The screw segment in the threaded hole and the straight rod segment fixedly connected with the arc rod; the telescopic frame also includes a ferrule for limiting the screw segment; the ferrule is locked together with the internal thread sleeve.

The suspension mechanism also includes a first gear fixedly connected with the internal thread sleeve; the first gear is coaxially arranged with the internal thread sleeve; the support also includes a driving device that drives a plurality of internal thread sleeves to rotate synchronously; the The driving device includes a ring gear that is rotatably connected to the shaft sleeve; the ring gear includes a first tooth surface matched with the first gear.

The driving device also includes a toggle wheel for driving the ring gear to rotate and a bearing plate for carrying the toggle wheel; The dial and the rotating shaft connected between the second gear and the dial; the ring gear also includes a second tooth surface matched with the second gear; the second tooth surface is perpendicular to the first tooth surface.

The bracket also includes a locking mechanism installed on the bearing frame; the locking mechanism is used to lock the inner ring gear; the bearing plate includes an inner end fixedly connected to the shaft sleeve and a corresponding inner end The outer end; the locking mechanism includes a block that is movable against the second gear, a guide rod connected between the block and the outer end, and a guide rod that is sleeved outside the guide rod and abuts against the outer end and the block The second compression spring between; the block is slidably connected with the guide rod; the block includes a second tooth groove matched with the second gear.

The tube barrel includes a barrel body and a cover that is detachably connected to the barrel body; the barrel body includes a plurality of accommodating grooves for accommodating test tubes; the barrel body includes an annular protrusion at the opening of the barrel body ; The cover body has a card slot that matches the annular protrusion; the card slot includes a clamping edge at its entrance; the clamping edge extends inward; the end surface of the clamping edge is an inclined surface; The end face of the annular protrusion is a guiding slope.

The tube barrel also includes a lid-opening mechanism installed on the barrel body; the lid-opening mechanism includes a lid-opening lever and a barrel sleeve sleeved outside the barrel; a plurality of the lid-opening levers are evenly distributed around the barrel body; the The barrel sleeve and the barrel body are connected together by threads; the lid opening lever includes a first end against the clamping edge, a second end corresponding to the first end, and a second end between the first end and the second end. A fulcrum between the ends; the fulcrum is connected to the barrel.

(3) Beneficial effects

The beneficial effects of the present invention are: in the actual implementation process, the centrifuge can adjust the distance of the tube barrel by adjusting the telescopic length of the telescopic frame, and at the same time, the tilt angle of the tube barrel can be adjusted through the adjustment mechanism, so that when the driving motor rotates at a constant speed Accurately adjust the centrifugal force of the barrel, improve the accuracy of biochemical experiments, reduce the centrifuge's dependence on high-precision drive motors, and reduce the cost of the centrifuge. Specifically, when adjusting the inclination angle of the barrel, first open the angle fixing assembly, use the arc arm to connect the barrel ball to rotate the barrel, and then fix the rotated barrel through the angle fixing assembly to realize Adjustment of the inclination angle of the barrel. When adjusting the centrifugal radius, it is necessary to open the angle fixing component first, and then adjust the telescopic frames of multiple suspension mechanisms synchronously. After the adjustment of the telescopic length of the telescopic frames is completed, the tube barrel is fixed by the angle fixing device.

Description of drawings

Fig. 1 is the structural representation of the centrifuge of the embodiment of the present invention;

Fig. 2 is the sectional view of the centrifuge of the embodiment of the present invention;

Fig. 3 is the enlarged view of the A area of the embodiment of the present invention;

Fig. 4 is the structural representation of the arc arm of the embodiment of the present invention;

FIG. 5 is a schematic structural view of a tube barrel according to an embodiment of the present invention;

Fig. 6 is the sectional view of the barrel of the embodiment of the present invention;

[Description of Reference Signs]

Shaft 1, tube barrel 2, bracket 3, suspension mechanism 31, adjustment mechanism 32, bushing 33, arc arm 311, telescopic frame 312, arc rod 3111, connecting section 3112, angle fixing component 3113, slide bar a11, Pretensioner a12, abutting section a13, gear teeth a131, first tooth groove 21, long hole b1, limit block a2, internal thread sleeve 3121, telescopic rod 3122, screw section c1, straight bar section c2, Ferrule 3123, first gear 313, driving device 34, ring gear 341, first tooth surface 3411, toggle wheel 342, bearing plate 343, second gear 3421, dial 3422, second tooth surface 3412, locking mechanism 35. Inner end 3431, outer end 3432, block 351, guide rod 352, second compression spring 353, barrel body 22, cover body 23, accommodation groove 221, annular protrusion 222, clamping edge 231, inclined Surface 2311, uncap mechanism 24, uncap lever 241, barrel cover 242, first end 2411, second end 2412, fulcrum 2413.

Implementation

In order to better explain the present invention and facilitate understanding, the present invention will be described in detail below through specific embodiments in conjunction with the accompanying drawings.

Referring to Figures 1-6, a centrifuge of the present invention includes a main body of equipment; the main body of the equipment includes a rotor and a drive motor that drives the rotor to rotate; the rotor includes a rotating shaft 1 connected to the drive motor, The tube barrel 2 containing the test tube and the support 3 connected between the tube barrel 2 and the rotating shaft 1; the support 3 includes a plurality of suspension mechanisms 31 evenly distributed around the rotating shaft 1; the tube barrel 2 is installed on two between the two suspension mechanisms 31; the suspension mechanism 31 can adjust the distance between the pipe barrel 2 and the rotating shaft 1; Connected bushing 33; the suspension mechanism 31 includes an arc-shaped arm 311 connected to the barrel 2 and a telescopic frame 312 connected between the bushing 33 and the arc-shaped arm 311; the arc-shaped arm 311 includes an arc Shaped rod 3111, connection section 3112 and angle fixing assembly 3113 respectively connected to the two ends of arc rod 3111; Composition; the adjustment mechanism 32 includes a connecting segment 3112 of one arc arm 311 and an angle fixing component 3113 of the other arc arm 311 . In the actual implementation process, the centrifuge can adjust the distance of the tube barrel 2 by adjusting the telescopic length of the telescopic frame 312, and at the same time, the tilt angle of the tube barrel 2 can be adjusted through the adjustment mechanism 32, so that the tube barrel can be precisely adjusted when the driving motor speed is constant. The centrifugal force of 2 reduces the dependence of the centrifuge on the high-precision drive motor, thereby reducing the cost of the centrifuge. Specifically, when adjusting the inclination angle of the barrel 2, the angle fixing assembly 3113 is first opened, and the arc arm 311 is used to connect the barrel 2 with a ball to rotate the barrel 2, and then the angle fixing assembly 3113 is used to adjust the angle after the rotation. The tube barrel 2 is fixed to realize the adjustment of the inclination angle of the tube barrel 2 . When adjusting the centrifugal radius, it is necessary to open the angle fixing assembly 3113 first, and then adjust the telescopic frames 312 of multiple suspension mechanisms 31 synchronously.

Optionally, the angle fixing assembly 3113 includes a slide bar a11 slidably connected to the arc bar 3111 and a pretensioner a12 connected between the slide bar a11 and the arc bar 3111; the slide bar a11 includes an arc The connecting section 3112 connected by the rod 3111 and the abutting section a13 of the abutting tube barrel 2; the abutting section a13 includes a gear tooth part a131; the tube barrel 2 has a first tooth groove 21 matched with the gear tooth part a131 .

Optionally, the arc rod 3111 includes a chute matching with the slide bar a11; the connecting section 3112 can extend into the chute; between the first compression spring. In the actual implementation process, the inclination angle of the tube barrel 2 is fixed through the cooperation of the gear tooth part a131 and the first tooth groove 21; specifically, in the process of adjusting the inclination angle of the tube barrel 2, the gear tooth part a131 is first released The first tooth groove 21, at this time, the sliding rod a11 and the arc rod 3111 slide relative to each other, and the pretensioner a12 shrinks further to carry out the pretensioning force storage; after that, the user rotates the tube barrel 2 to adjust the inclination angle of the tube barrel 2 Adjustment: After the adjustment of the inclination angle of the tube barrel 2 is completed, the gear tooth part a131 is inserted into the first tooth groove 21 . Wherein, the tooth pitch of the gear tooth portion a131 is the same, and the more the number of teeth of the gear tooth portion a131 is, the higher the adjustment accuracy is.

Optionally, the arc rod 3111 also includes a long hole b1 on its circumferential surface; the long hole b1 communicates with the chute; the angle fixing assembly 3113 also includes a The limit block a2 protruding into the chute; the limit block a2 includes a connecting portion connected to the connecting section 3112 and a snap-in portion stuck at the elongated hole b1. In the actual implementation process, the sliding rod a11 is limited by setting the limit stopper a2, so as to prevent the sliding rod a11 from unintentionally detaching from the arc rod 3111, and also facilitate the installation of the first compression spring and the sliding rod a11.

Optionally, the telescopic frame 312 includes an internal thread sleeve 3121 that is rotatably connected to the side wall of the shaft sleeve 33 and a telescopic rod 3122 that is threadedly connected with the internal thread sleeve 3121; threaded hole; the telescopic rod 3122 includes a screw segment c1 extending into the threaded hole and a straight rod segment c2 fixedly connected with the arc rod 3111; the telescopic frame 312 also includes a ferrule for limiting the screw segment c1 3123 ; the ferrule 3123 is locked together with the internal threaded sleeve 3121 . When adjusting the centrifugal radius, the telescopic rod 3122 moves axially along the threaded hole by rotating the inner threaded sleeve 3121, so as to realize the adjustment of the centrifugal radius. This adjustment method is simple and efficient.

In order to make the rotor rotate smoothly and efficiently, multiple suspension mechanisms 31 need to be adjusted synchronously. Optionally, the suspension mechanism 31 also includes a first gear 313 fixedly connected to the internal thread sleeve 3121; the first gear 313 is coaxially arranged with the internal thread sleeve 3121; The threaded sleeve 3121 rotates synchronously with the drive device 34 ; the drive device 34 includes a ring gear 341 rotatably connected to the shaft sleeve 33 ; the ring gear 341 includes a first tooth surface 3411 matched with the first gear 313 . In the actual implementation process, rotating the ring gear 341 can drive multiple internal thread sleeves 3121 to rotate synchronously, so that multiple suspension mechanisms 31 can move synchronously, so that the force of multiple tube barrels 2 can be balanced after adjustment, thereby ensuring the rotation of the rotor The process is smooth and efficient.

For the convenience of the operator, the ring gear 341 is rotated. Optionally, the driving device 34 also includes a toggle wheel 342 for driving the ring gear 341 to rotate and a bearing plate 343 for carrying the toggle wheel 342; The ring 341 matches the second gear 3421, the dial wheel 3422 under the bearing and the rotating shaft connected between the second gear 3421 and the dial wheel 3422; the ring gear 341 also includes the second gear 3421 matched with the second gear Two tooth surfaces 3412 ; the second tooth surface 3412 is perpendicular to the first tooth surface 3411 . In the actual implementation process, the second gear 3421 is driven to rotate after the dial 3422 is turned, and the ring gear 341 is rotated through the cooperation of the second gear 3421 and the second tooth surface 3412, and the rotation circle of the dial 3422 can be calculated at the same time. Number, precisely adjust the centrifugal radius.

In order to prevent the ring gear 341 from loosening when the rotor rotates, the centrifugal radius is not adjusted involuntarily. Optionally, the bracket 3 also includes a locking mechanism 35 installed on the carrier; the locking mechanism 35 is used to lock the inner ring gear 341; The end 3431 and the outer end 3432 corresponding to the inner end 3431; the locking mechanism 35 includes a block 351 that is movable against the second gear 3421, and a guide connected between the block 351 and the outer end 3432 The rod 352 and the second compression spring 353 sleeved outside the guide rod 352 and abutted between the outer end 3432 and the block 351; the block 351 is slidably connected with the guide rod 352; the block 351 includes a The second tooth groove that the second gear 3421 matches. In the actual implementation process, the second compression spring 353 squeezes the block 351, and the block 351 squeezes the second gear 3421 along the guide rod 352 to clamp the second gear 3421, which can effectively prevent the rotation of the second gear 3421, and then lock the second gear 3421. Tighten the ring gear 341; when the ring gear 341 needs to be adjusted, the clamping block 351 can be pressed to disengage the clamping block 351 from the second gear 3421.

Optionally, the tube barrel 2 includes a barrel body 22 and a cover body 23 detachably connected with the barrel body 22; the barrel body 22 includes a plurality of accommodating grooves 221 for accommodating test tubes; the barrel body 22 includes an annular protrusion 222 at the opening of the barrel body 22; the cover 23 has a card slot that matches the annular protrusion 222; the card slot includes a clamping edge 231 at its entrance; the clamping The edge 231 extends inward; the end surface of the clamping edge 231 is an inclined surface; the end surface of the annular protrusion 222 is a guiding inclined surface. In the actual implementation process, the test tube is placed in the barrel 2, and a plurality of test tubes can be placed in one barrel 2, which is beneficial to centrifuging a large number of test tubes. The function of the cover 23 is to close the accommodating groove 221; or elastic materials such as rubber. When the cover body 23 is installed, the guide shoe surface fits and slides with the inclined surface, which facilitates the installation of the cover body 23 .

Optionally, the tube barrel 2 also includes an uncapping mechanism installed on the barrel body 22; the uncapping mechanism includes an uncapping lever 241 and a barrel sleeve 242 sleeved outside the barrel body 22; a plurality of the uncapping mechanisms The lid lever 241 is evenly distributed around the barrel body 22; the barrel sleeve 242 and the barrel body 22 are screwed together; the lid opening lever 241 includes a first end 2411 against the clamping edge 231, The second end 2412 corresponding to the first end 2411 and the fulcrum 2413 between the first end 2411 and the second end 2412 ; the fulcrum 2413 is connected to the barrel body 22 . In the actual implementation process, the barrel cover 242 is rotated to move the barrel cover 242 along the barrel body 22 , and the second ends 2412 of the levers are squeezed, thereby prying the clamping edge 231 to facilitate the user to disassemble the cover body 23 .

Above shows and described basic principle of the present invention and main feature and the advantage of the present invention, and the standard parts that the present invention uses all can be purchased from the market, and special-shaped part all can be ordered according to the record of instruction manual and accompanying drawing, The specific connection method of each part adopts conventional methods such as bolts, rivets and welding in the prior art. The machinery, parts and equipment all adopt the conventional models in the prior art, and the circuit connection adopts the conventional connection in the prior art. way, which will not be described in detail here.

The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent transformations made by using the description of the present invention and the contents of the accompanying drawings, or directly or indirectly used in related technical fields, are all included in the same principle. Within the scope of patent protection of the present invention.

Claims (10)

1. A centrifuge, comprising a main body of equipment; the main body of the equipment includes a rotor and a drive motor that drives the rotor to rotate; the rotor includes a rotating shaft connected to the drive motor, a tube bucket for containing test tubes, and a tube barrel connected to the tube The bracket between the barrel and the rotating shaft; it is characterized in that: the bracket includes a plurality of suspension mechanisms uniformly arranged around the rotating shaft; the tube barrel is installed between two suspension mechanisms; the suspension mechanism can adjust the tube The distance between the bucket and the rotating shaft; the bracket also includes an adjustment mechanism for adjusting the inclination angle of the tube barrel and a shaft sleeve fixedly connected with the rotating shaft; the suspension mechanism includes an arc-shaped arm connected with the tube barrel and connected to the A telescopic frame between the bushing and the arc arm; the arc arm includes an arc rod, a connection section connected to both ends of the arc rod and an angle fixing assembly; the connection section is ball-connected with the barrel; the The adjusting mechanism is mainly composed of two adjacent arc-shaped arms; the adjusting mechanism includes the connecting section of one arc-shaped arm and the angle fixing assembly of the other arc-shaped arm. 2. A centrifuge according to claim 1, characterized in that: the angle fixing assembly includes a slide bar slidingly connected to the arc rod and a pretensioning member connected between the slide bar and the arc bar; The slide rod includes a connection section connected with the arc rod and a top section against the pipe barrel; the top section includes a gear tooth part; and the pipe barrel has a first tooth groove matched with the gear tooth part. 3. A centrifuge according to claim 2, characterized in that: the arc-shaped rod includes a chute matched with the slide bar; the connecting section can extend into the chute; the pretensioning member includes Butt against the first compression spring between the bottom of the chute and the connecting section. 4. A centrifuge as claimed in claim 3, characterized in that: the arc-shaped rod also includes a long hole on its circumferential surface; the long hole communicates with the chute; the angle is fixed The assembly also includes a limit block that can extend into the chute from the elongated hole; the limit block includes a connecting portion connected with the connecting section and a snap-in portion stuck at the elongated hole. 5. A centrifuge as claimed in claim 4, characterized in that: the telescopic frame includes an internal thread sleeve that is rotatably connected to the side wall of the shaft sleeve and a telescopic rod that is threadedly connected with the internal thread sleeve; The sleeve includes a threaded hole matched with the telescopic rod; the telescopic rod includes a screw segment extending into the threaded hole and a straight rod segment fixedly connected with the arc rod; the telescopic frame also includes a clip for limiting the screw segment sleeve; the ferrule is locked together with the internal thread sleeve. 6. A centrifuge as claimed in claim 5, characterized in that: the suspension mechanism further comprises a first gear fixedly connected to the internally threaded sleeve; the first gear is arranged coaxially with the internally threaded sleeve; the The bracket also includes a driving device that drives a plurality of internal thread sleeves to rotate synchronously; the driving device includes a ring gear that is rotatably connected to the shaft sleeve; the ring gear includes a first tooth surface that matches the first gear. 7. A kind of centrifuge as claimed in claim 6, it is characterized in that: described driving device also comprises the toggle wheel that drives ring gear to rotate and the bearing plate that carries toggle wheel; Said toggle wheel includes and is in The second gear above the bearing plate and matched with the inner ring gear, the dial wheel under the load and the rotating shaft connected between the second gear and the dial wheel; the ring gear also includes the second gear matched with the second gear Two tooth surfaces; the second tooth surface is perpendicular to the first tooth surface. 8. A centrifuge as claimed in claim 7, characterized in that: said bracket also includes a locking mechanism mounted on the bearing frame; said locking mechanism is used to lock the inner ring gear; said bearing plate It includes an inner end fixedly connected to the bushing and an outer end corresponding to the inner end; the locking mechanism includes a block that movably abuts against the second gear, and a guide connected between the block and the outer end. The rod and the second compression spring that is sleeved outside the guide rod and abutted between the outer end and the block; the block is slidably connected with the guide rod; the block includes a second gear that matches the second gear. alveolar. 9. A centrifuge according to any one of claims 1-8, characterized in that: the barrel includes a barrel and a cover that is detachably connected to the barrel; the barrel includes a plurality of An accommodating groove for accommodating test tubes; the barrel body includes an annular protrusion at the opening of the barrel body; the cover has a card slot that matches the annular protrusion; the card slot includes a slot at its entrance Clamping edge; the clamping edge extends inward; the end surface of the clamping edge is an inclined surface; the end surface of the annular protrusion is a guiding inclined surface. 10. A centrifuge as claimed in claim 9, characterized in that: the tube barrel also includes a cover-opening mechanism installed on the barrel; the cover-opening mechanism includes a cover-opening lever and a Bucket cover; a plurality of said opening levers are evenly distributed around the barrel body; said barrel cover and barrel body are connected together by threads; The second end corresponding to the end and a fulcrum between the first end and the second end; the fulcrum is connected with the bucket body.

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