EP0111492A1 - Assemblage d'attache d'un rotor de centrifugeuse - Google Patents

Assemblage d'attache d'un rotor de centrifugeuse

Info

Publication number
EP0111492A1
EP0111492A1 EP19830901294 EP83901294A EP0111492A1 EP 0111492 A1 EP0111492 A1 EP 0111492A1 EP 19830901294 EP19830901294 EP 19830901294 EP 83901294 A EP83901294 A EP 83901294A EP 0111492 A1 EP0111492 A1 EP 0111492A1
Authority
EP
European Patent Office
Prior art keywords
rotor
shaft
hub
centrifuge
ized
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP19830901294
Other languages
German (de)
English (en)
Inventor
Herschel E. Wright
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beckman Coulter Inc
Original Assignee
Beckman Instruments Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Beckman Instruments Inc filed Critical Beckman Instruments Inc
Publication of EP0111492A1 publication Critical patent/EP0111492A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
    • F16D1/06—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end
    • F16D1/08—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key
    • F16D1/09—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key with radial clamping due to axial loading of at least one pair of conical surfaces
    • F16D1/092—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key with radial clamping due to axial loading of at least one pair of conical surfaces the pair of conical mating surfaces being provided on the coupled hub and shaft
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B5/00—Other centrifuges
    • B04B5/04—Radial chamber apparatus for separating predominantly liquid mixtures, e.g. butyrometers
    • B04B5/0407—Radial chamber apparatus for separating predominantly liquid mixtures, e.g. butyrometers for liquids contained in receptacles
    • B04B5/0414—Radial chamber apparatus for separating predominantly liquid mixtures, e.g. butyrometers for liquids contained in receptacles comprising test tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B9/00—Drives specially designed for centrifuges; Arrangement or disposition of transmission gearing; Suspending or balancing rotary bowls
    • B04B9/08—Arrangement or disposition of transmission gearing ; Couplings; Brakes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B21/00—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings
    • F16B21/06—Releasable fastening devices with snap-action
    • F16B21/08—Releasable fastening devices with snap-action in which the stud, pin, or spigot has a resilient part
    • F16B21/088—Releasable fastening devices with snap-action in which the stud, pin, or spigot has a resilient part the stud, pin or spigot being integrally formed with the component to be fastened, e.g. forming part of the sheet, plate or strip
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B7/00—Elements of centrifuges
    • B04B7/02—Casings; Lids
    • B04B2007/025—Lids for laboratory centrifuge rotors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B9/00—Drives specially designed for centrifuges; Arrangement or disposition of transmission gearing; Suspending or balancing rotary bowls
    • B04B9/08—Arrangement or disposition of transmission gearing ; Couplings; Brakes
    • B04B2009/085—Locking means between drive shaft and rotor

Definitions

  • the present invention is directed to high speed centrifuges and, more particularly, is directed to the 5 connection between a centrifuge rotor and the drive mech ⁇ anism in a centrifuge.
  • Centrifuges are designed to create a high force field that is utilized in clinical as well as laboratory 10 analysis of various fluid samples.
  • the centrifuge rotors rotate at very high speeds to create the tremendous G forces necessary to cause the separation of the constitu ⁇ ents of the fluid sample for analysis.
  • One typical approach for providing the connec ⁇ tion between the rotor and the drive hub is the horr ⁇ tion of a threaded stud.
  • the stud extends up through the rotor and a handle is used to properly secure the rotor into the drive hub.
  • the drive hub has vertical flats on it to mate with flat areas within the rotor to provide the necessary positive con ⁇ nection to prevent relative motion between the rotor and the drive mechanism.
  • rotors have to be removed from the centrifuge subsequent to the centrifugation run. Threaded types of connection mechanisms become very time consuming in laboratory practice where the rotor may be removed and reinserted in the centrifuge several times during a relatively short period of time.
  • the present invention is directed to an attach ⁇ ment assembly for securing a centrifuge rotor to the drive mechanism in a centrifuge in such a manner that no relative motion " will occur between the rotor and the drive mechanism.
  • the attachment assembly utilizes a connecting shaft which is designed to operate in a convenient one-step operation to not only provide the connection between the rotor and the drive hub, but also provide disengagement of the rotor from the drive hub.
  • the elongated connecting shaft has a plurlity of flexible fingers which, when moved to a first position in a longitudinal direction, will provide for the locking of the rotor on the drive hub. The movement of the con- necting shaft in the same longitudinal direction to a second position will provide for the unlocking of the rotor from the drive hub.
  • Figure 1 is a partial sectional view of the present invention's attachment assembly with the connect ⁇ ing shaft in the unlocked position;
  • Figure 2 is a partial sectional view similar to Figure 1 with the connecting shaft moved in a direction toward its locked position;
  • Figure 3 is a sectional view similar to Figure 1 with the connecting shaft in its locked position;
  • Figure 4 is a sectional view similar to Figure 1 with the connecting shaft in its disengaging position;
  • Figure 5 is a sectional view similar to Figure
  • a rotor 10 having a body portion 12 and a lid 14. Fluid samples are placed in the body portion 12 of the rotor 10 for centrifugation.
  • the rotor is mounted on a drive hub 16 that is connected to a drive shaft 18.
  • the drive hub 16 is located within a rotor chamber (not shown) while the drive shaft 18 is connected below the rotor chamber to drive means (not shown) for spinning the shaft at very high speeds.
  • the rotational speed of the drive shaft 18 is imparted to the rotor when placed on the rotor hub 16.
  • the rotor will spin at a high speed of rotation to create the necessary centrifugal forces to provide the separation of the con ⁇ stituent parts of the fluid samples.
  • Located within the body portion 12 of the rotor is a drive hub recess 20 for receipt of the drive hub 16.
  • the only connection necessary between the rotor and the drive hub is the physical contact be ⁇ tween the two items. If the weight of the rotor is suf ⁇ ficient and the drive has a relatively low torque, the drive hub will provide the proper transfer of rotation to the rotor 10 without any relative motion between the drive hub and the rotor. However, in some instances when the rotor is not of sufficient weight and when the drive mechanism does not have low torque, it is necessary to provide a connection mechanism*between the rotor and the drive hub so that no relative motion will occur between the two.
  • an attachment assembly 22 is utilized for providing connection between the rotor and the drive hub 16.
  • the attachment assembly includes an elongate connecting shaft 24 that is slidably posi ⁇ tioned within an opening 26 in the lid 14.
  • the connect ⁇ ing shaft 24 has at its lower end with respect to Figure i at least two flexible fingers 30 which in their relaxed position have an exterior diameter the same as the diam ⁇ eter of the connecting shaft 24 above the area of the fingers 30.
  • Located on the locking end 32 of each of the flexible fingers 30 is an anchoring collar section 34 which together form a collar with an exterior diameter greater than the diameter formed by the fingers 30 or the main portion of the connecting shaft 24. This difference in diameter forms an anchoring ledge 36 on each finger.
  • This anchoring ledge 36 will be utilized for providing the locking function of this connecting shaft as will be explained below.
  • the rotor lid 14 has a spring recess 38 which receives a biasing spring 40.
  • the biasing spring 40 is positioned between a shoulder 42 in the spring recess 38 and a shoulder 44 formed at the upper end of the connect ⁇ ing shaft 24 with respect to Figure 1 where the connect ⁇ ing shaft contacts an activating knob 46. Consequently, the connecting shaft 24 is always biased in a direction upward toward the rotor lid 14.
  • a locking cavity 48 having an enlarged upper recess 50 forming a shoulder 52.
  • a retain ⁇ ing ring 54 Positioned on the shoulder 52 is a retain ⁇ ing ring 54 having an internal opening 56 with a diameter approximately the same as the exterior diameter of. the connecting shaft 24. .
  • the retaining ring 54 is held in place by a clip 58.
  • the connecting shaft 24 is moved in a downward direction to move the flexible fingers 30 toward the recess 48 in the drive hub 16. Because the exterior diameter of the total of the anchoring collar sections 34 on the locking ends 32 of the flexible fing ⁇ ers 30 is greater than the interior diameter of the open- ing 56 of the retaining ring 54, the flexible fingers 30 will be compressed toward each other as shown in Figure 2.
  • the tapered surfaces 60 on the locking ends 32 of the fingers 30 provide guidance through the opening 56. Once the anchoring ledges 36 of the anchoring collar sections 34 pass through the opening 56, they will move into en ⁇ gagement with the locking surface 62 of the retaining ring 54.
  • the size of the drive hub recess 48 allows for the flexible fingers 30 to flex away from each other to their original relaxed position and secure the anchoring collar in a locked position with respect to the retaining 5 ring 54.
  • the biasing spring 40 in the rotor lid will provide an upward force on the connecting 0 shaft 24 to provide tight engagement between anchoring collars and the retaining ring.
  • the connecting shaft 24 is in its locked position so that the rotor is secured to the drive hub 16.
  • this 5 positive connection between the rotor and the drive hub will prevent any relative motion occurring between the drive hub and the rotor.
  • the connecting shaft 24 is moved to a sec ⁇ ond downward position as shown in Figure 4 wherein the 5 tapered surfaces 60 on the locking ends 32 of the flexi ⁇ ble fingers 30 move into a stripping collar or sleeve 64 which is slidably positioned in the drive hub recess 48.
  • the stripping sleeve 64 has an exterior diameter less than the interior diameter of the hub recess 48 so ° that the sleeve will freely slide within the recess 48 and, unless otherwise moved, will maintain a position at the bottom 66 of the recess 48.
  • the stripping sleeve 64 has an interior opening 68 having a diameter which is approximately the same as the diameter of the connecting shaft 24 and the diameter of the opening 56 in the re ⁇ taining ring 54.
  • the present invention is designed for ease of operation in both the locking and unlocking functions. Because the connecting shaft 24 is prebiased in an upward direction by the biasing spring 40, the only motion re ⁇ quired by the operator is a downward or pushing motion on the knob 46 of the connecting shaft. Indicator areas 70 and 72 in the form of indicia or colors adjacent the push knob 46 in Figure 1 will provide a visual indiction of the locked or unlocked position of the rotor on the drive hub. In other words, if both the indicator areas 70 and 72 are shown above the top 74 of the lid 14, the operator would know that the rotor is unlocked from the drive hub 16.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Centrifugal Separators (AREA)

Abstract

Un assemblage d'attache d'un rotor permet d'effectuer une connexion efficace et sûre entre un rotor (10) et un mécanisme d'entraînement de centrifugeuse (18). L'assemblage est conçu de telle manière que non seulement l'attache, mais également la déconnexion sont effectuées en une opération commode et en une seule étape. L'utilisation d'un arbre de connexion unique (24) avec des doigts flexibles (30) contribue à faciliter l'opération et à simplifier la fabrication de l'assemblage.
EP19830901294 1982-06-09 1983-03-07 Assemblage d'attache d'un rotor de centrifugeuse Withdrawn EP0111492A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US38648582A 1982-06-09 1982-06-09
US386485 1982-06-09

Publications (1)

Publication Number Publication Date
EP0111492A1 true EP0111492A1 (fr) 1984-06-27

Family

ID=23525774

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19830901294 Withdrawn EP0111492A1 (fr) 1982-06-09 1983-03-07 Assemblage d'attache d'un rotor de centrifugeuse

Country Status (2)

Country Link
EP (1) EP0111492A1 (fr)
WO (1) WO1983004379A1 (fr)

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0121206Y2 (fr) * 1985-08-08 1989-06-26
IT206343Z2 (it) * 1985-12-23 1987-08-10 Instrumentation Lab Spa Accoppiamento perfezionato fra mozzo di trascinamento e rotore a cuvette multiple per apparecchi di analisi.
DE3607505C1 (de) * 1986-03-07 1987-05-14 Heraeus Separationstechnik Gmb Zentrifuge
US4782562A (en) * 1987-05-21 1988-11-08 Emhart Enterprises Corp. Two-part plastic clip
DE3744046C2 (de) * 1987-12-24 1994-11-24 Westaflexwerk Gmbh & Co Kg Verfahren und Vorrichtung zum Aushalsen von dünnwandigen Blechrohren
EP0762940A1 (fr) * 1994-06-15 1997-03-19 Massachusetts Institute Of Technology Ensemble formant element de recouvrement de rotor de centrifuge a verrouillage
FR2727037A1 (fr) 1994-11-21 1996-05-24 Jouan Centrifugeuse a rotor demontable et a dispositif de blocage axial du rotor sur l'arbre d'entrainement
FR2770154B1 (fr) * 1997-10-23 1999-11-26 Jouan Centrifugeuse a rotor demontable et a dispositif de blocage axial du rotor sur une tete d'entrainement, et rotor pour une telle centrifugeuse
EP1043071A1 (fr) * 1999-04-09 2000-10-11 Jean-Denis Rochat Appareil de cetrifugation de liquide et utillisation de cet appareil
US7081081B2 (en) * 2002-04-22 2006-07-25 Kendro Laboratory Products, Lp Bayonet coupling mechanism for a centrifuge
DE102005014218B4 (de) * 2005-03-29 2008-03-06 Thermo Electron Led Gmbh Befestigungsvorrichtung eines Deckels für einen Zentrifugenrotor
JP4809474B2 (ja) * 2006-05-23 2011-11-09 エッペンドルフ アクチエンゲゼルシャフト 遠心ロータの閉鎖用カバー
FR2951964B1 (fr) * 2009-11-04 2012-04-06 Bms Internat Centrifugeuse comprenant des moyens d'indication visuelle et/ou tactile du montage correct du rotor sur l'arbre d'entrainement, et rotor correspondant
FR3005273A1 (fr) * 2013-05-02 2014-11-07 Afi Centrifuge Centrifugeuse de laboratoire comprenant des moyens pour le verrouillage en translation d'un rotor sur un arbre moteur d'entrainement
DE102013107681B4 (de) * 2013-07-18 2018-02-08 Andreas Hettich Gmbh & Co. Kg Zentrifuge
CN103481428B (zh) * 2013-09-09 2015-08-05 湖南恒科新材料有限公司 一种离心机用防抱死装置
DE102014112501B4 (de) * 2014-08-29 2017-07-27 Andreas Hettich Gmbh & Co. Kg Zentrifuge
EP3012027B1 (fr) * 2014-10-21 2016-09-21 Sigma Laborzentrifugen GmbH Ensemble d'embrayage actionné par la force centrifuge pour une centrifugeuse de laboratoire
DE102015113855A1 (de) * 2015-08-20 2017-02-23 Andreas Hettich Gmbh & Co. Kg Rotor einer Zentrifuge
DE102015113854A1 (de) * 2015-08-20 2017-02-23 Andreas Hettich Gmbh & Co. Kg Rotor einer Zentrifuge
DE102017130787A1 (de) * 2017-12-20 2019-06-27 Eppendorf Ag Zentrifugenrotor
EP3669993A1 (fr) * 2018-12-18 2020-06-24 Eppendorf AG Construction de connexion
EP3669992B1 (fr) * 2018-12-18 2024-11-06 Eppendorf SE Construction de connexion
FR3158894A1 (fr) 2024-02-06 2025-08-08 Sarl Afi Centrifuge Ensemble rotor pour centrifugeuse de laboratoire.

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FR955180A (fr) * 1950-01-10
US1381805A (en) * 1919-12-09 1921-06-14 Courtaulds Ltd Spinning-box mounting
FR1015447A (fr) * 1947-12-12 1952-09-29 Perfectionnements aux écrémeuses
US2739759A (en) * 1954-09-28 1956-03-27 Clay Adams Inc Centrifuge
US3019501A (en) * 1959-08-13 1962-02-06 Kirk Wing Company Fastener
US3165132A (en) * 1963-06-04 1965-01-12 Acme Mfg Co Inc Cutter drive for vegetable juicing machine
DE2722322C3 (de) * 1977-05-17 1981-08-27 Compur-Electronic GmbH, 8000 München Zentrifuge zum Trennen von Probenflüssigkeiten in röhrchenförmigen Behältern

Non-Patent Citations (1)

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Title
See references of WO8304379A1 *

Also Published As

Publication number Publication date
WO1983004379A1 (fr) 1983-12-22

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Legal Events

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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AK Designated contracting states

Designated state(s): CH DE GB LI

STAA Information on the status of an ep patent application or granted ep patent

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18D Application deemed to be withdrawn

Effective date: 19840510

RIN1 Information on inventor provided before grant (corrected)

Inventor name: WRIGHT, HERSCHEL E.