A screw-type centrifuge rotor

Abstract

The application discloses a screwing type centrifuge rotor, which comprises a rotor and a test tube, and further comprises a test tube cavity; the test tube cavity comprises a cavity, a driving matching part, an arc plate group and soft cloth, and the test tube is placed in the cavity; the test tube cavity further comprises a driving mechanism, the driving mechanism has a movement stroke of pressure rotation and synchronous rotation of the driving matching part, the soft cloth has a movement stroke of winding and rolling with the rotation of the driving matching part and inwardly pressing the arc plate group, and the arc plate has a movement stroke of pressure elastic deformation and inwardly pressing until abutting to the test tube. In the application, winding and rolling of the soft cloth are realized by rotating the driving mechanism in the positive direction or the reverse direction, the diameter of the cavity of the test tube cavity is finally reduced, the installation requirement of test tubes with different diameters in the test tube cavity is met, and the problem of repeatedly replacing the rotor in the prior art is solved.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and more specifically to a rotary centrifuge rotor. Background Technology

[0002] Centrifuges are used to remove liquid from wet solids and are generally classified into ordinary centrifuges, low-speed centrifuges, high-speed refrigerated centrifuges, and ultra-high-speed refrigerated centrifuges. High-speed refrigerated centrifuges can reach speeds of over 10,000 rpm. In addition to the performance and structure of low-speed refrigerated centrifuges, the angle rotors used in high-speed refrigerated centrifuges are made of titanium alloy and aluminum alloy, and the centrifuge tube caps are made of rigid polyethylene plastic.

[0003] However, in the existing technology, high-speed refrigerated centrifuges have difficulty in firmly clamping test tubes of different diameters when faced with test tubes of different models. It is necessary to change the rotor with different capacity and different speed. However, due to the high speed of the rotor, changing the rotor will cause secondary problems such as unstable connection between the rotor and the motor. Summary of the Invention

[0004] The present invention provides a rotary centrifuge rotor with variable diameter function, which can solve at least one of the above-mentioned technical problems.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a rotary centrifuge rotor, comprising a rotor and test tubes, and further comprising test tube cavities, wherein there are multiple test tube cavities, which are respectively arranged circumferentially around the rotor, and multiple test tubes are respectively installed in each of the test tube cavities;

[0006] The test tube cavity includes a cavity body, a driving fitting component, an arc-shaped plate assembly, and a soft cloth. The test tube is placed in the cavity body. The driving fitting component is inserted from the end of the cavity body to both sides of the cavity body and is assembled and fixed to the end of the cavity body. The arc-shaped plate assembly surrounds the outside of the cavity body and includes multiple arc-shaped plates that are elastically connected to the cavity body. The soft cloth covers the outside of the arc-shaped plate assembly and is respectively connected to both sides of the driving fitting component.

[0007] The test tube cavity also includes a driving mechanism, which is installed at the end of the cavity and engages with the drive mating component via a toothed chain drive. The driving mechanism has a stroke of rotation under pressure, which drives the drive mating component to rotate synchronously. The soft cloth has a stroke of winding and wrapping around the arc-shaped plate assembly as the drive mating component rotates, and pressing it inward. The arc-shaped plate has a stroke of elastic deformation under pressure, pressing inward until it contacts the test tube.

[0008] Furthermore, the rotor has multiple platforms evenly distributed circumferentially along its edge. The platforms are inclined, and each test tube cavity is sequentially mounted on each platform. A rotating shaft is mounted in the center of the rotor. The rotor is connected to a motor via the rotating shaft and has a rotation stroke around the rotating shaft under the drive of the motor.

[0009] Furthermore, the cavity includes a base, an annular portion, and a hemispherical portion. The base has an arc-shaped plate structure, the annular portion has an open annular structure and is vertically fixed to one end of the base, and the hemispherical portion has a closed hemispherical structure and is vertically fixed to the other end of the base. The test tube can pass through the annular portion, be placed on the base with the tube opening facing upwards, and have the bottom of the tube abutting against the hemispherical portion.

[0010] Furthermore, a hollow opening is provided between the annular portion and the hemispherical portion and above the base, and the arc-shaped plate assembly is distributed in an arc-shaped plate structure and covers the opening position along the outer circumference of the cavity;

[0011] Both the circular part and the hemispherical part are provided with polygonal plates along the circumferential fixed ring. Multiple rotating shafts are distributed along the circumferential ring on the polygonal plates. Each of the arc-shaped plates is respectively connected between a pair of rotating shafts that are arranged opposite to each other.

[0012] The arc-shaped plate includes a connecting plate and a rectangular spring. There are two rectangular springs, which are respectively located at both ends of the connecting plate. Each rectangular spring has a short plate fixed at both ends. A second rotating shaft is fixed to the outward side of the short plate. The rectangular spring is hinged to the connecting plate via the second rotating shaft at one end and to the first rotating shaft via the second rotating shaft at the other end.

[0013] Furthermore, the cavity also includes four extension plates, which are symmetrically distributed in pairs on both sides of the base;

[0014] The drive assembly includes two rollers, which are symmetrically distributed on both sides of the base along the length of the base.

[0015] The soft cloth covers the outer periphery of the cavity and the connecting plates of the arc-shaped plate assembly. The soft cloth has a binding shaft on each side. The roller passes through the hole in the protruding plate and the binding shaft in sequence and is connected between the two protruding plates. The soft cloth can be wound around the connecting plate as the roller rotates and squeeze the connecting plate inward. The connecting plate can be stretched by the rectangular springs at both ends until it is squeezed inward to the test tube.

[0016] Furthermore, the cavity also includes a support block, which is vertically fixed at the center of the bottom of the hemispherical part along the length direction of the base, and a trapezoidal groove is provided at the center of one end of the support block near the hemispherical part.

[0017] The drive assembly also includes a sprocket and a chain. There are two sprockets, which are coaxially fixed to the ends of each of the rollers near the hemispherical part. The chain is arranged in a triangular structure, with the top passing through the trapezoidal groove and the bottom two ends meshing with the two sprockets. The chain can drive the sprockets and the rollers to rotate synchronously, thereby driving the soft fabric to wind.

[0018] Furthermore, the drive assembly also includes a rear extension block, which is placed between the two rollers and fits against the outer peripheral surface of the hemisphere. The bottom of the rear extension block has a notch for the chain to pass through, and the end of the rear extension block away from the hemisphere is vertically fixed with a baffle to prevent the chain from slipping off.

[0019] Furthermore, the drive mechanism includes a spline sleeve and an operating shaft;

[0020] A push plate is fixed to the end of the operating shaft. Multiple spline shaft strips are arranged around the outer circumference of the operating shaft and spaced apart along the length direction. The spline shaft strips and the push plate are located at the same end of the operating shaft.

[0021] The spline sleeve is fitted outside the operating shaft and abuts against the push plate. The inside of the spline sleeve is provided with a spline hole along the length direction that matches the spline shaft strip. The outside of the spline sleeve is coaxially fitted with a sprocket.

[0022] A second hole is centrally located at the bottom of the hemispherical part and within the trapezoidal groove. A third hole, connecting to the trapezoidal groove, is centrally located at the end of the support block away from the hemispherical part. The second hole and the third hole are coaxial and of the same diameter and are connected. The operating shaft passes through the third hole and extends into the trapezoidal groove. The push plate is disc-shaped and placed within the trapezoidal groove, with a travel distance for extending into or out of the second hole. The spline sleeve passes through the third hole. The second sprocket is placed within the trapezoidal groove and meshes with the top of the chain. The operating shaft can drive the spline sleeve and the second sprocket to rotate synchronously, thereby driving the chain transmission.

[0023] Furthermore, the driving mechanism also includes a slider, a connecting plate, and a cross plate;

[0024] The slider has two sliders, which are mirror-distributed on both sides of the operating shaft. A top plate is vertically fixed to the inward side of the slider. The end of the top plate is provided with an arc-shaped retaining tooth. A sprocket three is coaxially sleeved on the outside of the operating shaft and away from the push plate. The arc-shaped retaining tooth meshes with the sprocket three. A spring is vertically fixed to the outward side of the slider. The end of the support block away from the hemisphere is symmetrically provided with a sliding groove. The slider is connected to the inner wall of the sliding groove via the spring and can slide along the sliding groove.

[0025] The connecting plate has two plates, which are mirror images of each other on both sides of the operating shaft. The slider extends out of the end of the slide groove and is provided with a rotating shaft three. The two ends of the horizontal plate are respectively provided with rotating shaft four. The connecting plate is hinged between the rotating shaft three and the rotating shaft four.

[0026] Furthermore, a torsion post is fixed to the end of the operating shaft away from the push plate, and a retaining ring is fixedly sleeved between the torsion post and the operating shaft. The horizontal plate passes through the torsion post through the centrally opened hole and engages with the retaining ring.

[0027] The torsion column has a rotational motion under force, which drives the operating shaft and spline sleeve to rotate synchronously. The torsion column also has a compression-induced extension and retraction motion, which drives the operating shaft and push plate to extend into or withdraw from the hemispherical part synchronously.

[0028] The beneficial effects of this invention are reflected in:

[0029] 1. In this invention, a forward / reverse rotation drive mechanism is used to drive the forward / reverse rotation of the sprocket two of the spline sleeve and the toothed chain of the chain, thereby driving the forward / reverse rotation of the drive mating sprocket one, which in turn drives the forward / reverse rotation of the winding roller. This achieves the winding and wrapping of the soft cloth, the inward pressure on the arc plate assembly, and the elastic contraction of the arc plate near the axis, ultimately reducing the diameter of the test tube cavity. Alternatively, it can achieve the stretching and recovery of the soft cloth, the outward release of the arc plate assembly, and the elastic expansion of the arc plate away from the axis, ultimately restoring the diameter of the test tube cavity. This satisfies the installation requirements of test tubes of different diameters in the test tube cavity, thus solving the problem of repeatedly replacing rotors in the prior art. It is not only more applicable and more flexible in adjustment, but also reduces equipment costs.

[0030] 2. In this invention, the pressing / pulling drive mechanism utilizes the sequential transmission of force between the torsion column, the operating shaft, and the push plate to allow the push plate to push into or out of the hemispherical part, thereby pushing the test tube out of the test tube cavity, realizing flexible use of the test tube, and improving the automation level and ease of operation of the equipment.

[0031] 3. In the driving mechanism of the present invention, the arc-shaped locking teeth of the sliders on both sides of the operating shaft are engaged with the sprocket three of the operating shaft itself to lock the operating shaft, thereby preventing the push plate from being accidentally pushed into the hemispherical part and ensuring the stability of the test tube in the test tube cavity. At the same time, pressure is applied to push and pull the torsion column to unlock and move the operating shaft. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the overall layout of an embodiment of the present invention.

[0033] Figure 2 This is an isometric view of the test tube cavity according to an embodiment of the present invention.

[0034] Figure 3 This is an isometric view of the test tube cavity from another perspective according to an embodiment of the present invention.

[0035] Figure 4 This is an exploded view of the test tube cavity according to an embodiment of the present invention.

[0036] Figure 5 This is an isometric view of the cavity according to an embodiment of the present invention.

[0037] Figure 6 This is an isometric view of the cavity from another perspective in an embodiment of the present invention.

[0038] Figure 7 This is an isometric view of the arc-shaped plate according to an embodiment of the present invention.

[0039] Figure 8 This is an isometric view of the drive mating component according to an embodiment of the present invention.

[0040] Figure 9 This is an embodiment of the present invention. Figure 8 An enlarged diagram of A in the diagram.

[0041] Figure 10 This is an exploded view of the drive mechanism according to an embodiment of the present invention.

[0042] The components in the attached diagram are labeled as follows:

[0043] 10. Rotor; 11. Platform; 12. Shaft;

[0044] 20. Test tube cavity; 21. Cavity; 211. Base; 212. Circular part; 213. Hemispherical part; 214. Support block; 215. Extended plate; 216. Polygonal plate; 217. Rotating shaft one; 218. Hole one; 219. Hole two; 2110. Trapezoidal groove; 2111. Hole three; 2112. Slide groove; 22. Drive mating parts; 221. Roller; 222. Rear unfolding block; 2221. Notched groove; 2222. Baffle; 223. Sprocket one; 224. Chain; 23. Arc plate assembly; 231. Arc plate; 2311. Connecting plate; 2312. Rectangular spring; 2313. Short plate; 2314. Rotating shaft two; 24. Soft cloth; 241. Hemmed through shaft;

[0045] 30. Drive mechanism; 31. Spline sleeve; 311. Second sprocket; 312. Spline hole; 32. Operating shaft; 321. Third sprocket; 322. Spline shaft strip; 323. Push plate; 324. Snap ring; 325. Torsion post; 33. Slider; 331. Top plate; 332. Arc-shaped retaining tooth; 333. Third rotating shaft; 334. Spring; 34. Connecting plate; 35. Horizontal plate; 351. Hole four; 352. Fourth rotating shaft;

[0046] 40. Test tube. Detailed Implementation

[0047] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indicators will also change accordingly. In addition, the meaning of "and / or" in the whole text includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution that satisfies both A and B. In addition, "multiple" refers to two or more.

[0048] See Figure 1-4 The present invention provides a rotary centrifuge rotor, including a rotor 10 and test tubes 40, and further including test tube cavities 20. There are multiple test tube cavities 20, which are arranged circumferentially around the rotor 10 at intervals. There are multiple test tubes 40, which are respectively installed in each of the test tube cavities 20.

[0049] The test tube cavity 20 includes a cavity 21, a driving fitting 22, an arc-shaped plate assembly 23, and a soft cloth 24. The test tube 40 is placed inside the cavity 21. The driving fitting 22 is inserted from the end of the cavity 21 to both sides of the cavity 21 and is assembled and fixed to the end of the cavity 21. The arc-shaped plate assembly 23 surrounds the outside of the cavity 21 and includes multiple arc-shaped plates 231 that are elastically connected to the cavity 21. The soft cloth 24 covers the outside of the arc-shaped plate assembly 23 and is respectively connected to both sides of the driving fitting 22.

[0050] The test tube cavity 20 also includes a drive mechanism 30, which is installed at the end of the cavity 21 and engages with the drive mating member 22 via a toothed chain drive. The drive mechanism 30 has a stroke of rotating under pressure and driving the drive mating member 22 to rotate synchronously. The soft cloth 24 has a stroke of winding and wrapping around the arc-shaped plate assembly 23 as the drive mating member 22 rotates, and pressing inward. The arc-shaped plate 231 has a stroke of elastic deformation under pressure and pressing inward until it contacts the test tube 40.

[0051] In this invention, a forward / reverse rotation drive mechanism is used to drive the forward / reverse rotation of the first sprocket of the drive assembly through the toothed chain transmission of the spline sleeve. This drives the forward / reverse rotation of the winding roller, thereby achieving the winding and wrapping of the soft cloth, the inward pressure on the arc plate assembly, and the elastic contraction of the arc plate near the axis. Ultimately, this reduces the diameter of the test tube cavity, or it allows the soft cloth to stretch and recover, the arc plate assembly to release outward, and the arc plate to expand away from the axis, ultimately restoring the diameter of the test tube cavity. This satisfies the installation requirements of test tubes of different diameters within the test tube cavity, thus solving the problem of repeatedly replacing rotors in existing technologies. This not only enhances applicability and flexibility of adjustment but also reduces equipment costs.

[0052] See Figure 1 In this embodiment, the rotor 10 has multiple platforms 11 evenly distributed along its circumferential edge. The platforms 11 are inclined, and each test tube cavity 20 is sequentially installed on each platform 11. The rotor 10 has a rotating shaft 12 installed in the center. The rotor 10 is connected to a motor via the rotating shaft 12 and has a rotation stroke around the rotating shaft 12 under the drive of the motor.

[0053] With this design, the motor drives the rotating shaft 12 to rotate, which in turn drives the rotor 10, the platform 11 and the test tube cavity 20 to rotate synchronously, thereby realizing high-speed centrifugal motion of each test tube 40 installed in each of the test tube cavities 20.

[0054] See Figure 5-6In this embodiment, the cavity 21 includes a base 211, an annular portion 212, and a hemispherical portion 213. The base 211 has an arc-shaped plate structure, the annular portion 212 has an open annular structure and is vertically fixed to one end of the base 211, and the hemispherical portion 213 has a closed hemispherical structure and is vertically fixed to the other end of the base 211. The test tube 40 can pass through the annular portion 212, is placed on the base 211 with its opening facing upward, and its bottom touches the hemispherical portion 213.

[0055] With this design, the test tube cavity 20 is fixed on the platform 11 by the cavity 21, and the test tube 40 is placed in contact with the base 211 through the annular part 212 until the bottom of the test tube 40 touches the hemispherical part 213.

[0056] See Figure 4-7 In this embodiment, the annular portion 212 and the hemispherical portion 213 are positioned above the base 211 and are provided with a hollow opening. The arc-shaped plate group 23 is distributed in an arc-shaped plate structure and covers the opening position along the outer circumferential surface of the cavity 21.

[0057] Both the circular portion 212 and the hemispherical portion 213 are provided with polygonal plates 216 along the circumferential fixed ring. Multiple rotating shafts 217 are distributed along the circumferential ring on the polygonal plate 216. Each arc plate 231 is respectively connected between a pair of oppositely arranged rotating shafts 217.

[0058] The arc-shaped plate 231 includes a connecting plate 2311 and a rectangular spring 2312. There are two rectangular springs 2312, which are respectively disposed at both ends of the connecting plate 2311. Each rectangular spring 2312 has a short plate 2313 fixed at both ends. A second rotating shaft 2314 is fixed to the outward side of the short plate 2313. The rectangular spring 2312 is hinged to the connecting plate 2311 via the second rotating shaft 2314 at one end, and to the first rotating shaft 217 via the second rotating shaft 2314 at the other end.

[0059] With this design, the tube body of the test tube 40 is exposed at the opening position, the arc-shaped plate group 23 surrounds the outer peripheral surface of the cavity 21, and the multiple arc-shaped plates 231 are elastically hinged to the two polygonal plates 216 to achieve elastic coverage of the opening and elastic limitation of the tube body of the test tube 40.

[0060] See Figure 2-4 In this embodiment, the cavity 21 further includes four extension plates 215, which are symmetrically distributed on both sides of the base 211.

[0061] The drive assembly 22 includes two rollers 221, which are symmetrically distributed on both sides of the base 211 along the length of the base 211.

[0062] The soft cloth 24 covers the outer periphery of the cavity 21 and the connecting plates 2311 of the arc-shaped plate group 23. The soft cloth 24 is provided with a binding shaft 241 on both sides. The roller 221 passes through the hole 218 of the protruding plate 215 and the binding shaft 241 in sequence and is connected between the two protruding plates 215. The soft cloth 24 can be wound around the connecting plate 2311 as the roller 221 rotates and presses the connecting plate 2311 inward. The connecting plate 2311 can be stretched by the rectangular springs 2312 at both ends until it is pressed inward to the test tube 40.

[0063] In this design, the soft cloth 24 is located at the outermost part of the test tube cavity 20. It is made of a flexible but not elastically deformable fabric material. The roller 221 can be rotatably inserted into the side of the cavity 21 by matching the insertion of the protruding plate 215. The soft cloth 24 is wrapped around the outer circumference of the cavity 21, adhering to the arc-shaped plate group 23, and its two ends are inserted and connected to the two rollers 221.

[0064] When the roller 221 rotates, it winds up the soft cloth 24, which in turn presses the arc-shaped plate assembly 23 inward. The arc-shaped plate 231 deforms accordingly until the connecting plate 2311 contacts the test tube 40, thus completing the limiting protection of the test tube 40. Conversely, when the roller 221 rotates in the opposite direction, the soft cloth 24 returns to its stretched state, and the arc-shaped plate 231 elastically recovers due to the loss of the squeezing force on the test tube 40.

[0065] See Figure 4-6 In this embodiment, the cavity 21 further includes a support block 214, which is vertically fixed at the center of the bottom of the hemispherical portion 213 along the length direction of the base 211, and a trapezoidal groove 2110 is provided at the center of one end of the support block 214 near the hemispherical portion 213.

[0066] The drive assembly 22 also includes a sprocket 223 and a chain 224. There are two sprockets 223, which are coaxially fixed to the ends of each of the rollers 221 near the hemispherical part 213. The chain 224 is arranged in a triangular structure, with its top passing through the trapezoidal groove 2110 and its bottom two ends meshing with the two sprockets 223 respectively. The chain 224 can drive the sprockets 223 and the rollers 221 to rotate synchronously, thereby driving the soft fabric 24 to be wound.

[0067] In this design, the driving engagement component 22 serves as a follower engagement component of the driving mechanism 30. It is installed at the bottom of the hemispherical part 213 and drives the rotation of the winding roller 221 through the meshing transmission relationship between the chain 224 and the sprocket 223, thereby realizing the winding of the soft cloth 24. This achieves the aforementioned elastic diameter change function and the limiting protection function for the test tube 40.

[0068] See Figure 9 In this embodiment, the drive assembly 22 further includes a rear extension block 222, which is placed between the two rollers 221 and fits against the outer peripheral surface of the hemispherical portion 213. The bottom of the rear extension block 222 has a notch 2221 for the chain 224 to pass through, and the end of the rear extension block 222 away from the hemispherical portion 213 is vertically fixed with a baffle 2222 for preventing the chain 224 from slipping off.

[0069] With this design, the rear extension block 222 fits against the hemispherical part 213 on the one hand, and the baffle 2222 provides limiting and anti-detachment protection for the chain 224, thereby enhancing the assembly stability of the drive mating part 22 and the cavity 21.

[0070] See Figure 3 , 9 In this embodiment, the drive mechanism 30 includes a spline sleeve 31 and an operating shaft 32.

[0071] A push plate 323 is fixed to the end of the operating shaft 32. A plurality of spline shaft strips 322 are arranged around the outer circumference of the operating shaft 32 and spaced apart along the length direction. The spline shaft strips 322 and the push plate 323 are located at the same end of the operating shaft 32.

[0072] The spline sleeve 31 is sleeved on the outside of the operating shaft 32 and abuts against the push plate 323. The inside of the spline sleeve 31 is provided with a spline hole 312 along the length direction that is matched with the spline shaft 322. The outside of the spline sleeve 31 is coaxially sleeved with a sprocket 311.

[0073] A second hole 219 is centrally located at the bottom of the hemispherical part 213 and within the trapezoidal groove 2110. A third hole 2111 is centrally located at the end of the support block 214 away from the hemispherical part 213, connecting to the trapezoidal groove 2110. The second hole 219 and the third hole 2111 are coaxial and of the same diameter and are connected. The operating shaft 32 passes through the third hole 2111 and extends into the trapezoidal groove 2110. The push plate 323 is disc-shaped and placed within the trapezoidal groove 2110, and has a travel stroke for extending into or out of the second hole 219. The spline sleeve 31 passes through the third hole 2111. The second sprocket 311 is placed within the trapezoidal groove 2110 and meshes with the top of the chain 224. The operating shaft 32 can drive the spline sleeve 31 and the second sprocket 311 to rotate synchronously, thereby driving the chain 224 to rotate.

[0074] With this design, the drive mechanism 30 is installed at the bottom of the hemispherical part 213 through interlocking and matching with the support block 214, and realizes the meshing transmission relationship with the drive mating part 22;

[0075] When the operating shaft 32 is rotated in the forward direction, the sprocket 211 of the spline sleeve 31 and the toothed chain drive of the chain 224 are used to drive the sprocket 223 to rotate in the forward direction, thereby driving the roller 221 to rotate in the forward direction. This simultaneously realizes the winding of the soft cloth 24, the inward pressure on the arc plate group 23, and the elastic contraction of the arc plate 231 near the axis, ultimately reducing the diameter of the test tube cavity 20.

[0076] Conversely, when the operating shaft 32 is rotated in the opposite direction, the soft cloth 24 is simultaneously stretched and restored, the arc-shaped plate group 23 is released outward, and the arc-shaped plate 231 is elastically expanded away from the axis, ultimately restoring the diameter of the test tube cavity 20. This satisfies the installation requirements of test tubes 40 of different diameters in the test tube cavity 20, thereby solving the problem of repeatedly replacing the rotor 10 in the prior art.

[0077] See Figure 3 and 10 In this embodiment, a torsion post 325 is fixed at the end of the operating shaft 32 away from the push plate 323. A retaining ring 324 is fixedly sleeved between the torsion post 325 and the operating shaft 32. The horizontal plate 35 passes through the torsion post 325 through the centrally opened hole 351 and engages with the retaining ring 324.

[0078] The torsion column 325 has a rotational motion under force, which drives the operating shaft 32 and the spline sleeve 31 to rotate synchronously. The torsion column 325 also has a compression extension and retraction motion, which drives the operating shaft 32 and the push plate 323 to extend into or withdraw from the hemispherical part 213 synchronously.

[0079] This design allows the test tube 40 to be pushed out of the cavity 21 by pressing or pulling the torsion column 325, utilizing the sequential transmission of force between the torsion column 325, the operating shaft 32, and the push plate 323. This enables the push plate 323 to pass through the hole 219 and push into or out of the hemispherical part 213, thereby flexibly accessing the test tube 40 and improving the automation level and ease of operation of the equipment.

[0080] See Figure 3 , 9 In this embodiment, the driving mechanism 30 further includes a slider 33, a connecting plate 34, and a cross plate 35;

[0081] Two sliders 33 are mirror-distributed on both sides of the operating shaft 32. A top plate 331 is vertically fixed to the inward side of the slider 33. An arc-shaped retaining tooth 332 is provided at the end of the top plate 331. A sprocket 321 is coaxially sleeved on the outside of the operating shaft 32 and away from the push plate 323. The arc-shaped retaining tooth 332 meshes with the sprocket 321. A spring 334 is vertically fixed to the outward side of the slider 33. A sliding groove 2112 is symmetrically opened at the end of the support block 214 away from the hemisphere 213. The slider 33 is connected to the inner wall of the sliding groove 2112 via the spring 334 and can slide along the sliding groove 2112.

[0082] Two connecting plates 34 are mirror-distributed on both sides of the operating shaft 32. The slider 33 extends out of the end of the slide groove 2112 and is provided with a rotating shaft 333. The two ends of the horizontal plate 35 are respectively provided with rotating shafts 352. The connecting plate 34 is hinged between the rotating shafts 333 and 352.

[0083] This design utilizes the meshing and locking between the arc-shaped locking teeth 332 located on both sides of the operating shaft 32 and the sprocket 321 of the operating shaft 32 itself to lock the operating shaft 32, preventing the push plate 323 from being accidentally pushed into the hemispherical part 213, and ensuring the stability of the test tube 40 placed in the cavity 21. At the same time, applying pressure to push and pull the torsion column 325 can unlock and move the operating shaft 32.

[0084] In summary, this invention utilizes a forward / reverse rotation drive mechanism, where the sprocket two of the spline sleeve and the toothed chain drive engage to drive the sprocket one of the drive assembly to rotate in both directions. This, in turn, drives the roller to rotate in both directions, achieving the winding and coiling of the soft cloth, the inward pressure on the arc-shaped plate assembly, and the elastic contraction of the arc-shaped plate near the axis. Ultimately, this reduces the diameter of the test tube cavity, or allows the soft cloth to stretch and recover, the arc-shaped plate assembly to release outward, and the arc-shaped plate to expand away from the axis, ultimately restoring the diameter of the test tube cavity. This satisfies the installation requirements of test tubes of different diameters within the test tube cavity, thus solving the problem of repeatedly replacing rotors in existing technologies. This not only enhances applicability and flexibility but also reduces equipment costs. Furthermore, the pressing / pulling drive mechanism utilizes the sequential force transmission between the torsion column, operating shaft, and push plate to allow the push plate to advance or retract from the hemispherical part, thereby pushing the test tube out of the test tube cavity. This enables flexible use of test tubes, improving the automation level and ease of operation of the equipment.

[0085] In the driving mechanism of the present invention, the arc-shaped locking teeth of the sliders on both sides of the operating shaft are engaged with the sprocket three of the operating shaft itself to lock the operating shaft, thereby preventing the push plate from being accidentally pushed into the hemispherical part and ensuring the stability of the test tube placed in the test tube cavity. At the same time, pressure is applied to push and pull the torsion column to unlock and move the operating shaft.

[0086] It should be understood that the examples and embodiments described herein are for illustrative purposes only and are not intended to limit the invention. Those skilled in the art can make various modifications or changes based on them. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the invention should be included within the protection scope of the invention.

Claims

1. A rotary centrifuge rotor, comprising a rotor (10) and test tubes (40), characterized in that: It also includes test tube cavities (20), of which there are multiple test tube cavities (20) arranged circumferentially around the rotor (10), and of which there are multiple test tubes (40), which are respectively installed in each of the test tube cavities (20); The test tube cavity (20) includes a cavity (21), a driving fitting (22), an arc plate assembly (23), and a soft cloth (24). The test tube (40) is placed inside the cavity (21). The driving fitting (22) is inserted from the end of the cavity (21) to both sides of the cavity (21) and is assembled and fixed to the end of the cavity (21). The arc plate assembly (23) surrounds the outside of the cavity (21) and includes multiple arc plates (231) that are elastically connected to the cavity (21). The soft cloth (24) covers the outside of the arc plate assembly (23) and is connected to both sides of the driving fitting (22) respectively. The test tube cavity (20) also includes a drive mechanism (30), which is installed at the end of the cavity (21) and is engaged with the drive fitting (22) in a toothed chain drive. The drive mechanism (30) has a stroke of rotating under pressure and driving the drive fitting (22) to rotate synchronously. The soft cloth (24) has a stroke of winding and wrapping around the arc-shaped plate assembly (23) as the drive fitting (22) rotates and pressing inward. The arc-shaped plate (231) has a stroke of elastic deformation under pressure and pressing inward until it abuts against the test tube (40).

2. The centrifuge rotor as described in claim 1, characterized in that: The rotor (10) has multiple platforms (11) evenly distributed circumferentially along its edge. The platforms (11) are inclined, and each test tube cavity (20) is sequentially installed on each platform (11). The rotor (10) has a rotating shaft (12) installed in the center. The rotor (10) is connected to a motor via the rotating shaft (12) and has a motion stroke around the rotating shaft (12) under the drive of the motor.

3. The rotary centrifuge rotor as described in claim 1, characterized in that: The cavity (21) includes a base (211), an annular portion (212), and a hemispherical portion (213). The base (211) has an arc-shaped plate structure. The annular portion (212) has an open annular structure and is vertically fixed to one end of the base (211). The hemispherical portion (213) has a closed hemispherical structure and is vertically fixed to the other end of the base (211). The test tube (40) can pass through the annular portion (212), with the tube opening facing upwards, and is placed on the base (211), with the bottom of the tube touching the hemispherical portion (213).

4. The rotary centrifuge rotor as described in claim 3, characterized in that: The annular portion (212) and the hemispherical portion (213) are positioned above the base (211) with a hollowed-out opening. The arc-shaped plate group (23) is distributed in an arc-shaped plate structure and covers the opening position along the outer circumference of the cavity (21). Both the circular part (212) and the hemispherical part (213) are provided with polygonal plates (216) along the circumferential fixed ring. Multiple rotating shafts (217) are distributed along the circumferential ring on the polygonal plate (216). Each arc plate (231) is respectively connected between a pair of rotating shafts (217) arranged opposite to each other. The arc-shaped plate (231) includes a connecting plate (2311) and a rectangular spring (2312). There are two rectangular springs (2312), which are respectively disposed at both ends of the connecting plate (2311). Each rectangular spring (2312) has a short plate (2313) fixed at both ends. A second rotating shaft (2314) is fixed on the outward side of the short plate (2313). The rectangular spring (2312) is hinged to the connecting plate (2311) via the second rotating shaft (2314) at one end, and to the first rotating shaft (217) via the second rotating shaft (2314) at the other end.

5. The rotary centrifuge rotor as described in claim 4, characterized in that: The cavity (21) also includes four extension plates (215), which are symmetrically distributed on both sides of the base (211). The drive assembly (22) includes two rollers (221), which are symmetrically distributed on both sides of the base (211) along the length direction of the base (211). The soft cloth (24) covers the outer periphery of the cavity (21) and wraps around each of the connecting plates (2311) of the arc-shaped plate group (23). The soft cloth (24) is provided with a binding shaft (241) on both sides. The roller (221) passes through the hole (218) of the protruding plate (215) and the binding shaft (241) in sequence and is connected between the two protruding plates (215). The soft cloth (24) can be wound around the connecting plate (2311) as the roller (221) rotates and presses the connecting plate (2311) inward. The connecting plate (2311) can be stretched by the rectangular springs (2312) at both ends until it is pressed inward to the test tube (40).

6. The centrifuge rotor as described in claim 5, characterized in that: The cavity (21) also includes a support block (214), which is vertically fixed at the center of the bottom of the hemisphere (213) along the length of the base (211), and a trapezoidal groove (2110) is provided at the center of the end of the support block (214) near the hemisphere (213); The drive assembly (22) further includes a sprocket (223) and a chain (224). There are two sprockets (223), which are coaxially fixed to the ends of each of the rollers (221) near the hemispherical part (213). The chain (224) is arranged in a triangular structure, with the top passing through the trapezoidal groove (2110) and the bottom two ends meshing with the two sprockets (223). The chain (224) can drive the sprockets (223) and the rollers (221) to rotate synchronously, thereby driving the soft fabric (24) to be wound.

7. The rotary centrifuge rotor as described in claim 6, characterized in that: The drive assembly (22) also includes a rear extension block (222), which is placed between the two rollers (221) and fits against the outer peripheral surface of the hemisphere (213). The bottom of the rear extension block (222) has a notch (2221) for the chain (224) to pass through, and the end of the rear extension block (222) away from the hemisphere (213) is vertically fixed with a baffle (2222) to prevent the chain (224) from slipping.

8. The rotary centrifuge rotor as described in claim 6, characterized in that: The drive mechanism (30) includes a spline sleeve (31) and an operating shaft (32); The end of the operating shaft (32) is fixed with a push plate (323). Multiple spline shaft strips (322) are arranged around the outer circumference of the operating shaft (32) and spaced apart along the length direction. The spline shaft strips (322) and the push plate (323) are located at the same end of the operating shaft (32). The spline sleeve (31) is sleeved on the outside of the operating shaft (32) and abuts against the push plate (323). The inside of the spline sleeve (31) is provided with a spline hole (312) that is matched with the spline shaft (322) along the length direction, and the outside of the spline sleeve (31) is coaxially sleeved with a sprocket (311). A second hole (219) is centrally located at the bottom of the hemisphere (213) within the trapezoidal groove (2110). A third hole (2111) is centrally located at the end of the support block (214) away from the hemisphere (213), connecting to the trapezoidal groove (2110). The second hole (219) and the third hole (2111) are coaxial and of the same diameter, and the operating shaft (32) passes through the third hole (2111) and extends into the trapezoidal groove (2110). The push... The plate (323) is disc-shaped and placed in the trapezoidal groove (2110), and has a movement stroke that extends into or out of the second hole (219). The spline sleeve (31) passes through the third hole (2111). The second sprocket (311) is placed in the trapezoidal groove (2110) and meshes with the top of the chain (224). The operating shaft (32) can drive the spline sleeve (31) and the second sprocket (311) to rotate synchronously, thereby driving the chain (224) to drive.

9. The rotary centrifuge rotor as described in claim 8, characterized in that: The drive mechanism (30) also includes a slider (33), a connecting plate (34), and a cross plate (35); Two sliders (33) are mirror-distributed on both sides of the operating shaft (32). A top plate (331) is vertically fixed to the inward side of the slider (33). An arc-shaped tooth (332) is provided at the end of the top plate (331). A sprocket three (321) is coaxially sleeved on the outside of the operating shaft (32) and away from the push plate (323). The arc-shaped tooth (332) meshes with the sprocket three (321). A spring (334) is vertically fixed to the outward side of the slider (33). A groove (2112) is symmetrically opened at the end of the support block (214) away from the hemisphere (213). The slider (33) is connected to the inner wall of the groove (2112) via the spring (334) and can slide along the groove (2112). Two connecting plates (34) are mirror-distributed on both sides of the operating shaft (32). The slider (33) extends out of the end of the slide groove (2112) and is provided with a rotating shaft three (333). The two ends of the horizontal plate (35) are respectively provided with rotating shaft four (352). The connecting plate (34) is hinged between the rotating shaft three (333) and the rotating shaft four (352).

10. The rotary centrifuge rotor as described in claim 9, characterized in that: The operating shaft (32) is fixed with a torsion post (325) at the end away from the push plate (323). A retaining ring (324) is fixedly sleeved between the torsion post (325) and the operating shaft (32). The horizontal plate (35) passes through the torsion post (325) through the centrally located hole (351) and engages with the retaining ring (324). The torsion column (325) has a rotational motion under force, which drives the operating shaft (32) and spline sleeve (31) to rotate synchronously. The torsion column (325) also has a compression extension and retraction motion, which drives the operating shaft (32) and push plate (323) to extend into or withdraw from the hemispherical part (213) synchronously.

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