EP0077890B1 - Palan électrique à chaîne - Google Patents

Palan électrique à chaîne Download PDF

Info

Publication number
EP0077890B1
EP0077890B1 EP82107167A EP82107167A EP0077890B1 EP 0077890 B1 EP0077890 B1 EP 0077890B1 EP 82107167 A EP82107167 A EP 82107167A EP 82107167 A EP82107167 A EP 82107167A EP 0077890 B1 EP0077890 B1 EP 0077890B1
Authority
EP
European Patent Office
Prior art keywords
gear shaft
gear
toothed wheel
reduction gearing
wheel
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.)
Expired
Application number
EP82107167A
Other languages
German (de)
English (en)
Other versions
EP0077890A3 (en
EP0077890A2 (fr
Inventor
Rudolf Ing.(Grad.) Rapp
Eugen Ing.(Grad.) Hornikel
Helmut Dipl.-Ing. Stiegler
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.)
R Stahl & Co Elektrozugwerk GmbH
Original Assignee
R Stahl & Co Elektrozugwerk 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
Application filed by R Stahl & Co Elektrozugwerk GmbH filed Critical R Stahl & Co Elektrozugwerk GmbH
Priority to AT82107167T priority Critical patent/ATE17699T1/de
Publication of EP0077890A2 publication Critical patent/EP0077890A2/fr
Publication of EP0077890A3 publication Critical patent/EP0077890A3/de
Application granted granted Critical
Publication of EP0077890B1 publication Critical patent/EP0077890B1/fr
Expired 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

Definitions

  • the invention relates to an electric chain hoist, whose reduction gear, which contains an overload slip clutch and is located between the output pinion of the electric motor and the axially parallel sprocket, is arranged in a gearbox housing which is connected to the externally flanged electric motor to form a unit having a suspension or fastening device which the sprocket is arranged in the immediate vicinity of the motor flange on one side of the output pinion, the overload slip clutch having a driven gear rotatably mounted on a gear shaft of the reduction gear, which is frictionally coupled to the gear shaft via coupling elements which are non-rotatably connected to the gear shaft is axially displaceable with respect to a stop fixed to the housing via an actuator for adjustment from the outside.
  • the overload slip clutch is arranged on the gear shaft that supports the sprocket and is non-rotatably coupled to it, which rotates the slowest with respect to the housing of all gear shafts of the reduction gear, which means that the Overload slip clutch must be designed for a relatively large torque.
  • the overload slip clutch in this case has a conical hub which is non-rotatably coupled to the transmission shaft carrying the chain wheel and which is coupled via a conical friction lining to the drive gear assigned to it.
  • a coaxial face screw is screwed into the gear shaft, which in turn is supported by a support disk against a bearing bush of the gear shaft forming a stop fixed to the housing.
  • the chain hoist To adjust or readjust the slipping clutch using the adjusting screw rotating with the gear shaft, the chain hoist must therefore be stopped so that the adjusting screw can only be operated when the chain hoist is at a standstill. In practical terms, this means that in the case of an adjustment or readjustment process, the set friction torque can only be checked after lifting a test load. In order to set a desired maximum friction torque at which the slip clutch begins to slip, the adjustment process may have to be repeated several times, which means that the adjustment or readjustment is time-consuming and uneconomical.
  • the normal operation with the gear shaft with the circumferential adjusting screw for the overload slip clutch entails a certain risk of accident, which is due to the fact that when the adjusting key is set, it can be forgotten while sitting on the adjusting screw when the electric motor is switched on.
  • This overload clutch is, however, a snap-in clutch, which contains spring-loaded snap balls as clutch elements, which are lifted out of their detents in the axial direction against the spring force when a maximum torque is exceeded, thus releasing the clutch.
  • An axial displacement of a thrust piece acting on the balls is sensed via a motion sensor which emits a corresponding overload signal which is used to shut down the drive.
  • the overload clutch has no devices to influence the pretension of the compression spring acting on the balls and thus to change the maximum transmissible torque.
  • the object of the invention is to provide an electric chain hoist of the type mentioned at the outset, which is distinguished by the fact that the overload slip clutch can be made small under simple structural conditions and offers increased security against a fall in the load when the overload slip clutch responds, At the same time, a simple adjustment or readjustment of the maximum torque that can be transmitted via the overload slip clutch is possible from the outside while the electric motor is running.
  • the chain hoist according to the invention is characterized in that the coupling elements consist of axially displaceable clutch disks arranged on both sides of the gearwheel, which have a friction lining on their side facing the gearwheel, that the gearwheel also has at least one through the clutch disks with the gear shaft the gear shaft arranged spring element is axially braced that the gear shaft is supported in the biasing direction via a bearing of the gear shaft and a pressure plate against an adjusting screw serving as an actuator and that the gear wheel is assigned to a first gear stage of the reduction gear.
  • the overload slip clutch can be designed for a relatively small torque, which requires a correspondingly small amount of space.
  • the stationary adjusting screw allows the overload slip clutch to be adjusted or adjusted from the outside while the electric motor is running, so that the maximum transferable torque can be set sensitively using the prescribed test load. Since the overload slip clutch as a friction clutch at If an overload does not suddenly occur and there is at least one gear stage of the reduction gear between the slipping clutch and the sprocket, there is increased certainty that the load will fall at high speed after the overload slipping clutch has responded. Finally, control and marking signs for the respectively set maximum transferable torque can easily be attached to the outside, not with revolving adjusting screws in relation to the stationary housing, which brings with it a further substantial increase in operational safety.
  • the electric chain hoist has a gear housing 1 to which a suspension device in the form of a suspension eye 2 is fastened and which on two sides encloses a chain wheel 4 lying in a common vertical plane with the suspension eye 2, which sprocket is arranged in the gear housing 1 through a spur gear reduction gear 3 is driven.
  • An electric motor 5 designed as a brake motor is flanged to the side of the transmission housing 1 by means of a flange 7 formed on its end plate 6 on the output side.
  • the motor shaft 8 carries an output pinion 9, which lies within the gear housing 1 and is in engagement with a gear 10 of the first gear stage. It runs parallel to the axis 11 of the chain wheel 4.
  • the sprocket 4 lies on one side (in FIG. 2 on the right side) of the output pinion 9 and the motor shaft 8, while the gear 10 of the first meshing with the output pinion 9 Gear stage is arranged on the opposite side of the output pinion 9 and both the output pinion 9 as well as the gear 10 and the sprocket 4 lie in a common plane which is perpendicular to the motor shaft 8 and is indicated at 11 in FIG. 1.
  • the gearwheel 10 of the first gear stage is freely rotatably mounted on a bushing 12, which in turn is seated on a first gear shaft 13 in a rotationally fixed and axially displaceable manner, and is formed with an annular flange 14 which bears against a gear shaft 13 in a corresponding bearing recess of the gear housing 1 bearing rolling bearing 15 supports.
  • the ring flange 14 carries on its side facing the gear 10 a friction lining 16.
  • a clutch disc 17 is also rotatably and axially displaceably placed on the transmission shaft 13, which is also supported by a friction lining 18 against the gear 10 and against it by Disc springs 19 is pressed, which abut on the end of an annular collar of the gear shaft 13.
  • the gear 10 thus forms with the annular flange 14 and the clutch disc 17 a slip clutch, the maximum torque that can be transmitted is determined by the preload of the plate springs 19.
  • the gear shaft 13 is axially adjustable with respect to the roller bearing 15 which forms a stop fixed to the housing for the ring flange 14.
  • the gear shaft 13 is mounted at the other end via a roller bearing 21 in a corresponding bearing recess of a gear cover 22 detachably placed on the gear housing 1, the arrangement being such that the roller bearing 21 has a pressure plate 23 and a corresponding threaded hole in the gear cover 22 screwed adjusting screw 24 is axially displaceable.
  • the adjusting screw 24 is clearly accessible from the outside of the transmission, so that the overload torque of the slip clutch can be conveniently adjusted.
  • a gear 25 sits on the gear shaft 13 in a rotationally fixed manner, which meshes with a gear 26 of the second gear stage which is rotatably mounted at 27, 28 and which in turn has a gear 29 connected to it in a rotationally fixed manner and a gear 31 wedged onto the shaft 30 of the chain wheel 4 the third gear stage drives the sprocket 4.
  • the chain indicated at 34 is anchored at the end of the gear housing 1. It is then, which is not further illustrated, guided over a flange carrying the lifting hook and the chain wheel 4.
  • a small rope or tape drum can be used if necessary without changing the overall construction, because after loosening the screws 35, 36 the side chain guides 37, 38 can be easily removed, which is possible because the gear housing 1 has the sprocket 4 only surrounds on two sides.
  • the electric motor 5 is a simple brake motor with an output pinion 9 and a flange 7 on its end plate 6. In this embodiment, it can also be used for other purposes. It is also possible to use a different electric motor 5 to achieve a different lifting speed to install the gear housing 1 without requiring changes to the gear housing 1. This is illustrated in FIG. 4, where alternatively a differently designed electric motor 5a is indicated below the axis of the motor shaft 8.
  • the very low overall height of the gear unit, and thus also the gear unit housing 1, makes it possible to utilize the space above and below the gear unit housing 1 in the manner shown in particular in FIGS. 1 and 3.
  • the actual gear housing 1 is surrounded by a housing part 39 which follows the outline of the end shield 6 and continues this, which is closed at the end by a simple sheet metal hood 40 attached.
  • a free space 41 into which connecting lines and control lines 42 and 43 are introduced, which lead to the electric motor 5 or to switching and control devices which are accommodated in the space 41.
  • the equipment compartment containing it is closed off from the outside by the hood 40.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gear Transmission (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
  • Transmission Devices (AREA)
  • Power-Operated Mechanisms For Wings (AREA)
  • Amplifiers (AREA)
  • Dry Shavers And Clippers (AREA)
  • Gears, Cams (AREA)

Claims (1)

  1. Palan électrique à chaîne dont le train réducteur (3), renfermant un accouplement à patinage sous surcharge et intercalé entre le pignon de sortie (9) du moteur électrique et la roue à chaîne (4), dont l'axe est parallèle à celui de ce dernier, est placé dans un carter de boîte de vitesse (1) qui est relié au moteur électrique, bridé extérieurement sur ledit carter, en une unité de construction qui comporte un dispositif de suspension ou de fixation (2) et dans laquelle la roue à chaîne est disposée, d'un côté du pignon de sortie, à proximité immédiate du flasque (7) du moteur, tandis que l'accouplement à patinage sous surcharge comporte, montée tournante sur un arbre de transmission (13) du train réducteur, une roue dentée entraînée (10) qui est couplée en assemblage par friction, par des éléments d'accouplement (plateaux d'embrayage 14, 17) solidaires en rotation dudit arbre de transmission, avec ce dernier, lequel est déplaçable, pour reprise de son réglage, en translation axiale à partir de l'extérieur par rapport à une butée (roulement 15) fixe sur le carter, par un organe de réglage (24), palan caractérisé par le fait que les éléments d'accouplement se composent de plateaux d'embrayage (14,17) disposés de part et d'autre de la roue dentée (10) et déplaçables en translation axiale, lesquels comportent sur leur face tournée vers ladite roue dentée un revêtement de friction (16), que par l'intermédiaire des plateaux d'embrayage la roue dentée est serrée axialement sur l'arbre de transmission (13) par au moins un élément élastique (19) également disposé sur ledit arbre de transmission, que l'appui de ce dernier en direction de tension préétablie s'effectue, par un palier (21) dudit arbre et une plaque de compression (23), contre une vis de rappel (24) servant d'organe de réglage et que la roue dentée est affectée à un premier étage de transmission du train réducteur (3).
EP82107167A 1981-10-27 1982-08-07 Palan électrique à chaîne Expired EP0077890B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82107167T ATE17699T1 (de) 1981-10-27 1982-08-07 Elektrokettenzug.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19813142473 DE3142473A1 (de) 1981-10-27 1981-10-27 Elektrokettenzug
DE3142473 1981-10-27

Publications (3)

Publication Number Publication Date
EP0077890A2 EP0077890A2 (fr) 1983-05-04
EP0077890A3 EP0077890A3 (en) 1983-06-22
EP0077890B1 true EP0077890B1 (fr) 1986-01-29

Family

ID=6144878

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82107167A Expired EP0077890B1 (fr) 1981-10-27 1982-08-07 Palan électrique à chaîne

Country Status (3)

Country Link
EP (1) EP0077890B1 (fr)
AT (1) ATE17699T1 (fr)
DE (1) DE3142473A1 (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3442791A1 (de) * 1984-11-23 1986-06-12 Wolfgang Dipl.-Ing. 8399 Ruhstorf Rösch Elektronischer aufzugantrieb
DE3710332C1 (de) * 1987-03-28 1988-07-21 Stahl R Foerdertech Gmbh Elektrozug
DE3911292A1 (de) * 1989-04-04 1990-10-11 Mannesmann Ag Kompakthebezeug
DE3939976C1 (en) * 1989-12-02 1991-04-11 Abus Werner Buehne Kg, 5270 Gummersbach, De Load lifter for small hoist - has impeller vane on DC motor shaft on end facing toward horn gear drive, in order to extract heat generated by motor
EP0647586B1 (fr) * 1993-10-06 1996-09-11 ABUS Kransysteme GmbH & Co. KG. Dispositif d'entraînement pour un appareil de levage
DE19508833C2 (de) * 1994-03-14 1999-12-23 Stahl R Foerdertech Gmbh Kettenzug mit geschütztem Anschlußkasten
DE4408578C2 (de) * 1994-03-14 1999-12-30 Stahl R Foerdertech Gmbh Sicherheitskupplung für einen Kettenzug
DE4434373C2 (de) * 1994-09-15 1999-04-01 Mannesmann Ag Elektrozug mit drehzahlgeregelter Geschwindigkeit
DE19530891C2 (de) * 1995-08-14 1999-11-18 Mannesmann Ag Hebezeug, das mit einem Zugmittel betrieben ist
DE19810994C1 (de) * 1998-03-13 1999-08-19 Hoffmann Foerdertechnik Gmbh W Kettenhalterung für die Hubkette von Kettenzügen
DE10034950B4 (de) * 2000-07-13 2009-02-12 Hoffmann Fördertechnik GmbH Wurzen Kettenbefestigung für die Rundstahlkette von Kettenzügen

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR657252A (fr) * 1927-07-20 1929-05-21 Palan coaxial à commande électrique
US2022049A (en) * 1932-06-30 1935-11-26 Associated Electric Lab Inc Signaling apparatus
US2656150A (en) 1951-12-06 1953-10-20 Yale & Towne Mfg Co Hoist construction
GB741063A (en) 1952-10-17 1955-11-23 Demag Zug Gmbh Electric hoist
DE967900C (de) * 1952-10-18 1957-12-27 Demag Zug Gmbh Kleinsthebezeug
GB751023A (en) * 1954-01-21 1956-06-27 Columbus Mckinnon Chain Corp Improvements in or relating to hoists
US2969954A (en) * 1958-01-30 1961-01-31 Columbus Mckinnon Corp Electric hoist
GB915023A (en) 1959-06-24 1963-01-09 King Ltd Geo W Improvements in or relating to chain hoist pulley blocks
DE1209711B (de) * 1962-04-07 1966-01-27 Demag Zug Gmbh Kleinkettenflaschenzug mit Verschiebelaeufermotor
US3362685A (en) * 1965-05-18 1968-01-09 Paul R. Noye Chain hoist
FR92370E (fr) * 1966-11-22 1968-10-31 Birfield Eng Ltd Palan électrique
DE1431962A1 (de) * 1967-01-20 1969-05-29 Hoffmann & Co Kg Durch einen Elektromotor angetriebene Kettenwinde
JPS5227808Y2 (fr) * 1973-05-14 1977-06-24
US3971971A (en) * 1974-11-15 1976-07-27 Ingersoll-Rand Company Electric hoist control and braking system
JPS5842119B2 (ja) * 1976-04-02 1983-09-17 株式会社日立製作所 巻上機械用過負荷防止装置

Also Published As

Publication number Publication date
ATE17699T1 (de) 1986-02-15
EP0077890A3 (en) 1983-06-22
DE3142473C2 (fr) 1988-01-07
DE3142473A1 (de) 1983-05-11
EP0077890A2 (fr) 1983-05-04

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