EP0647586B1 - Dispositif d'entraînement pour un appareil de levage - Google Patents

Dispositif d'entraînement pour un appareil de levage Download PDF

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Publication number
EP0647586B1
EP0647586B1 EP93116142A EP93116142A EP0647586B1 EP 0647586 B1 EP0647586 B1 EP 0647586B1 EP 93116142 A EP93116142 A EP 93116142A EP 93116142 A EP93116142 A EP 93116142A EP 0647586 B1 EP0647586 B1 EP 0647586B1
Authority
EP
European Patent Office
Prior art keywords
slip clutch
fact
accordance
torque
gear unit
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.)
Revoked
Application number
EP93116142A
Other languages
German (de)
English (en)
Other versions
EP0647586A1 (fr
Inventor
Lothar Bühne
Willi Martens
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.)
ABUS Kransysteme GmbH
Original Assignee
ABUS Kransysteme GmbH
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=8213326&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0647586(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by ABUS Kransysteme GmbH filed Critical ABUS Kransysteme GmbH
Priority to EP93116142A priority Critical patent/EP0647586B1/fr
Priority to DE59303780T priority patent/DE59303780D1/de
Priority to AT93116142T priority patent/ATE142599T1/de
Priority to ES93116142T priority patent/ES2093898T3/es
Publication of EP0647586A1 publication Critical patent/EP0647586A1/fr
Application granted granted Critical
Publication of EP0647586B1 publication Critical patent/EP0647586B1/fr
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D3/00—Portable or mobile lifting or hauling appliances
    • B66D3/18—Power-operated hoists
    • B66D3/20—Power-operated hoists with driving motor, e.g. electric motor, and drum or barrel contained in a common housing
    • B66D3/22—Power-operated hoists with driving motor, e.g. electric motor, and drum or barrel contained in a common housing with variable-speed gearings between driving motor and drum or barrel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
    • B66D1/02—Driving gear
    • B66D1/14—Power transmissions between power sources and drums or barrels
    • B66D1/16—Power transmissions between power sources and drums or barrels the drums or barrels being freely rotatable, e.g. having a clutch activated independently of a brake
    • B66D1/18—Power transmissions between power sources and drums or barrels the drums or barrels being freely rotatable, e.g. having a clutch activated independently of a brake and the power being transmitted from a continuously operating and irreversible prime mover, i.e. an internal combustion engine, e.g. on a motor vehicle or a portable winch
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
    • B66D1/54—Safety gear
    • B66D1/58—Safety gear responsive to excess of load

Definitions

  • the invention relates to a device for driving a hoist, in which a transmission and a slip clutch are provided in a drive train between the shaft of an asynchronous motor and the drive shaft of the hoist.
  • the three-phase drive that is by far the most frequently used, in particular because of its simple structure and robustness, is the asynchronous motor with squirrel-cage rotor.
  • One of its disadvantages is that its speed is proportional to the frequency of the three-phase supply network and inversely proportional to its number of pole pairs, so it cannot be changed if it is supplied from a three-phase network without the interposition of control elements. If the fed three-phase network has a frequency of 50 Hz, the maximum speed of the asynchronous motor is limited to 3000 rpm.
  • the asynchronous motor with squirrel-cage rotor is preferably used in conveyor technology.
  • pole-changing motors are increasingly being used, especially in hoists.
  • a parallel shaft, spur gear or planetary gear is inserted into the drive train between the pole-changing asynchronous motor and hoist, thus adapting the drive to the desired output speed.
  • the strength of the gear unit must be such that even sudden braking on the output side does not lead to the destruction of the gear unit.
  • the forces occurring in the above-mentioned operating case are considerable as a result of the rotational energy of the motor and flywheel.
  • gearbox has to be considerably oversized in relation to its nominal power.
  • a further unfavorable load situation occurs when the pole-changing asynchronous motor is switched from the motor winding with a low number of pole pairs to the motor winding with a higher number of pole pairs.
  • the asynchronous motor works as a generator during the switchover.
  • the engine braking torque generated is a multiple of the nominal torque.
  • the gearbox must therefore be dimensioned for this engine braking torque.
  • the slip clutch is provided in the drive train between the asynchronous motor and hoist in addition to the transmission.
  • Such drives are known per se.
  • the slip clutch In the drive known from EP-A-0 077 890, the slip clutch is in the first gear stage. This serves to provide security in the event that the load crashes at full load after the slip clutch has responded. The overload torque can also be set with your help.
  • the slip clutch In the drive known from DE-A-14 31 962, the slip clutch is accommodated together with a brake in a housing part which is separate from the motor. The slip clutch is used to elastically absorb the impact of the limiting part of a chain in the highest load position.
  • the invention has for its object to provide a device of the type mentioned in such a way that the transmission can be loaded in a jerky manner without an overload occurring.
  • this object is achieved in that the slipping clutch provided in the drive train is set such that the torque generated by its static friction, the Slipping torque is greater than the starting torque of the asynchronous motor on the one hand, but less than the torque occurring when the gearbox output shaft is subjected to sudden loads.
  • the slip clutch is thus set so that the starting torque of the motor is not sufficient to rotate the clutch wheels of the slip clutch against each other.
  • the slip torque of the slip clutch is below the maximum engine torque in order to limit the drive torque.
  • a slip clutch in the sense of the invention is to be understood as a safety clutch that is not switchable, torque-actuated, non-positive, rotationally flexible and resilient.
  • an oversizing of the transmission can be dispensed with.
  • the gearbox only needs to be designed to withstand a slightly higher load than the maximum engine torque requires.
  • the entire drive unit becomes smaller, lighter and less expensive.
  • the slip clutch is accommodated in a separate module which has standard connection dimensions.
  • This module can be switched between any gear and any motor, however it is preferred to install the slip clutch in the gear. This can be done both with a planetary gear as well as with a spur gear or a flat gear.
  • the slip clutch has a large adjustment range. This makes it possible to adapt the device to different engine and transmission combinations.
  • the spur gear selected as an exemplary embodiment has an input shaft 11 and an output shaft 14.
  • a motor (not shown) can be connected to the drive shaft 11, preferably an asynchronous motor with a squirrel-cage rotor.
  • a drive of a hoist which is also not shown, can be connected to the output shaft 14.
  • Pinion shafts 12, 13 are provided between the drive shaft 11 and the output shaft 14.
  • the shafts 11 to 14 are supported by means of ball bearings 21 to 24 in the two-part housing 40 of the transmission, which is fastened to one another by screws 30.
  • the shafts 11 to 13 have gear rings 51 to 53 on their circumference, which are in engagement with gear wheels 62 to 64 fastened on the respectively adjacent shafts 12 to 14.
  • the ring gears 51 to 53 and the gears 62 to 64 form paired gear stages which effect the translation of the speed in a known manner.
  • a slip clutch 3 is arranged between the drive shaft 11 and the first pinion shaft 12.
  • the slip clutch 3 is mounted by means of a feather key 9 on the pinion shaft 12 with its two clutch wheels 1, 2 slidably in the axial direction of the pinion shaft 12.
  • a plate spring 6 presses against the clutch wheel 1, via which the torque applied by the slip clutch 3 can be adjusted.
  • a hexagon nut 8 is provided on the end face of the pinion shaft 12, which presses against the adjacent ball bearing 22 via a washer 7 and against the plate spring 6 via the ball bearing 22. Tightening the hexagon nut 8 results in the adjustment of the slip clutch 3.
  • the clutch wheels 1, 2 are formed on the mutually facing sides as hollow stub shafts 10, 20.
  • the adjacent gear wheel 62 is supported on the hollow stub shafts 10, 20 via a slide bearing 4.
  • the coupling wheels 1, 2 are provided with a slip coating 5 on the sides facing one another radially outwards. With the slip pads 5, the clutch wheels 1, 2 rest under the action of the plate spring 6 on the end faces 60 of the adjacent gear 62.
  • the gear 62 engages with its outer ring 61 in the ring gear 51 of the drive shaft 11.
  • the transmission operates like a "normal" multi-stage spur gear. If the loads on the output shaft 14 leave the range mentioned, the slip clutch 3 acts: the transmission of the torque between the slip lining 5 of the Clutch wheels 1, 2 and the end faces 60 of the adjacent gear 62 become so large that slip occurs between these parts - Fig. 2b -.
  • the other critical load case namely the switching of the pole-changing motor, is shown in Fig. 2a below. In all cases, the gearbox remains within the specified load limits.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Control And Safety Of Cranes (AREA)
  • Jib Cranes (AREA)
  • Structure Of Transmissions (AREA)
  • Retarders (AREA)
  • Gear Transmission (AREA)
  • Carriers, Traveling Bodies, And Overhead Traveling Cranes (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)

Claims (9)

  1. Dispositif d'entraînement pour un appareil de levage, dans lequel une transmission et un limiteur de couple (3) sont prévus dans une ligne d'entraînement, comprise entre l'arbre d'un moteur asynchrone et l'arbre moteur de l'engin de levage, caractérisé en ce que le limiteur de couple (3) est réglé de sorte que le couple produit par son frottement statique- le couple de friction- est supérieur au couple de démarrage du moteur asynchrone, mais inférieur au couple produit lors d'une sollicitation par à-coups de l'arbre de sortie (14) de la transmission.
  2. Dispositif suivant la revendication 1, caractérisé en ce que le couple de friction se situe au-dessous du couple moteur maximal.
  3. Dispositif suivant l'une des revendications 1 et 2, caractérisé en ce que le limiteur de couple (3) est logé dans un module séparé, présentant des cotes de raccordement standard.
  4. Dispositif suivant l'une des revendications 1 et 2, caractérisé en ce que le limiteur de couple (3) est incorporé à la transmission.
  5. Dispositif suivant l'une des revendications 1 à 4, caractérisé en ce que le limiteur de couple (3) dispose d'une large plage de réglage.
  6. Dispositif suivant l'une des revendications 1 à 5, caractérisé en ce qu'une transmission plate, un engrenage droit ou un train planétaire, sont utilisés comme transmission.
  7. Dispositif suivant l'une des revendications 1 à 6, caractérisé en ce qu'un écrou hexagonal (8) est vissé sur le côté frontal de l'arbre, recevant le limiteur de couple (3), cet écrou pressant l'une des roues d'embrayage (1) du limiteur de couple (3) par l'intermédiaire d'un disque (7) et d'un roulement à billes (42), ainsi que d'un ressort à disques (6).
  8. Dispositif suivant la revendication 4 en liaison avec l'une des revendications 5 à 7, caractérisé en ce que le limiteur de couple (3) est fixé sur un arbre de pignon (12) de la transmission, et en ce qu'une roue dentée (62) de la transmission est maintenue d'une part entre les garnitures de friction (5) du limiteur de couple (3), et engrène d'autre part dans des dents d'un arbre adjacent (11) de la transmission.
  9. Dispositif suivant la revendication 8, caractérisé en ce que les roues d'embrayage (1, 2) du limiteur de couple (3) sont réalisées sur leurs côtés tournés l'un vers l'autre sous forme de bouts d'arbre creux (10, 20), sur lesquels est montée la roue dentée (62) au moyen d'un palier lisse (4), et, à l'extérieur et dans ce prolongement, sous forme de disques munis de garnitures de friction (5), entre lesquels la roue dentée (62) est maintenue par ses faces frontales (60).
EP93116142A 1993-10-06 1993-10-06 Dispositif d'entraînement pour un appareil de levage Revoked EP0647586B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP93116142A EP0647586B1 (fr) 1993-10-06 1993-10-06 Dispositif d'entraînement pour un appareil de levage
DE59303780T DE59303780D1 (de) 1993-10-06 1993-10-06 Vorrichtung zum Antrieb eines Hebezeugs
AT93116142T ATE142599T1 (de) 1993-10-06 1993-10-06 Vorrichtung zum antrieb eines hebezeugs
ES93116142T ES2093898T3 (es) 1993-10-06 1993-10-06 Dispositivo para el accionamiento de un equipo elevador.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP93116142A EP0647586B1 (fr) 1993-10-06 1993-10-06 Dispositif d'entraînement pour un appareil de levage

Publications (2)

Publication Number Publication Date
EP0647586A1 EP0647586A1 (fr) 1995-04-12
EP0647586B1 true EP0647586B1 (fr) 1996-09-11

Family

ID=8213326

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93116142A Revoked EP0647586B1 (fr) 1993-10-06 1993-10-06 Dispositif d'entraînement pour un appareil de levage

Country Status (4)

Country Link
EP (1) EP0647586B1 (fr)
AT (1) ATE142599T1 (fr)
DE (1) DE59303780D1 (fr)
ES (1) ES2093898T3 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19951221A1 (de) * 1999-04-01 2000-10-05 Mannesmann Ag Windwerk, insbesondere Hebezeug, mit einem Gehäuse
DE102015218300B4 (de) 2015-09-23 2019-10-31 Flender Gmbh Motorbetriebener Kranantrieb, Verfahren zu dessen Betrieb, und Steuergerät

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1431962A1 (de) * 1967-01-20 1969-05-29 Hoffmann & Co Kg Durch einen Elektromotor angetriebene Kettenwinde
DE1963647A1 (de) * 1969-02-28 1970-10-08 Suhl Hebezeugwerk Mechanisierter Stirnradzug
US4175727A (en) * 1978-03-06 1979-11-27 Ederer Incorporated Single failure proof crane
DE3142473A1 (de) * 1981-10-27 1983-05-11 R. Stahl GmbH & Co , Elektrozugwerk, 7118 Künzelsau Elektrokettenzug
JPS5939693A (ja) * 1982-08-25 1984-03-05 株式会社キト− 電気式巻上兼牽引装置
DE3910369A1 (de) * 1989-03-28 1990-10-04 Mannesmann Ag Sicherheitseinrichtung

Also Published As

Publication number Publication date
ES2093898T3 (es) 1997-01-01
DE59303780D1 (de) 1996-10-17
ATE142599T1 (de) 1996-09-15
EP0647586A1 (fr) 1995-04-12

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