EP0182968A2 - Dispositif de blocage de rotation - Google Patents

Dispositif de blocage de rotation Download PDF

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Publication number
EP0182968A2
EP0182968A2 EP85108652A EP85108652A EP0182968A2 EP 0182968 A2 EP0182968 A2 EP 0182968A2 EP 85108652 A EP85108652 A EP 85108652A EP 85108652 A EP85108652 A EP 85108652A EP 0182968 A2 EP0182968 A2 EP 0182968A2
Authority
EP
European Patent Office
Prior art keywords
worm
screw
working
catching
catch
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.)
Ceased
Application number
EP85108652A
Other languages
German (de)
English (en)
Other versions
EP0182968A3 (fr
Inventor
Siegfried Lehmann
Friedrich Prof. Dr.-Ing. Jarchow
Dietrich Dr.-Ing. Haensel
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.)
GfA-Antriebstechnik GmbH
GFA ANTRIEBSTECHNIK GmbH
Original Assignee
GfA-Antriebstechnik GmbH
GFA ANTRIEBSTECHNIK 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 GfA-Antriebstechnik GmbH, GFA ANTRIEBSTECHNIK GmbH filed Critical GfA-Antriebstechnik GmbH
Publication of EP0182968A2 publication Critical patent/EP0182968A2/fr
Publication of EP0182968A3 publication Critical patent/EP0182968A3/fr
Ceased legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
    • E06B9/56—Operating, guiding or securing devices or arrangements for roll-type closures; Spring drums; Tape drums; Counterweighting arrangements therefor
    • E06B9/80—Safety measures against dropping or unauthorised opening; Braking or immobilising devices; Devices for limiting unrolling
    • E06B9/82—Safety measures against dropping or unauthorised opening; Braking or immobilising devices; Devices for limiting unrolling automatic
    • E06B9/84—Safety measures against dropping or unauthorised opening; Braking or immobilising devices; Devices for limiting unrolling automatic against dropping

Definitions

  • the invention relates to a safety catch for power-operated windows, doors, gates, elevators or the like.
  • a worm wheel connected in a rotationally fixed manner to a winding shaft and two self-locking screws which are operatively connected to a drive shaft, one screw as the working screw and the other, idling screw serves as a catch worm, the catch worm being axially displaceable to a limited extent and having at least one stop bolt fixed to the housing, and the catch worm being rotated by the drive shaft via a connection designed as a predetermined breaking point.
  • a self-locking device for a roller shutter drive in which the rotation is transmitted from a drive worm to a drive shaft for actuating the roller shutter via a worm gear.
  • a worm wheel which meshes with the drive worm driven by a motor, is arranged in a rotationally fixed manner on the drive shaft.
  • a second worm wheel is non-rotatably connected on one side of the first worm wheel, whereby this takes no force. If the first worm wheel fails, the second worm wheel jams with the drive worm, so that the motor can no longer be driven via this worm and self-locking occurs.
  • the second worm wheel is under axial spring load, so that if the first worm wheel fails due to an inclination of the tooth flanks, the second worm wheel is axially displaced up to a stop which causes self-locking.
  • the catch device consists in that two worm wheels arranged on the winding shaft each driven by its own worm.
  • One worm drive as a work drive is constantly under load, while the other worm drive as an auxiliary worm drive runs unloaded.
  • the self-locking and axially displaceable auxiliary worm is always connected to its auxiliary worm wheel without load. If the worm gear drive fails, the auxiliary worm gear comes under load, at the same time the transmission of the drive torque to the auxiliary worm is interrupted at a predetermined breaking point.
  • the object of the invention is to create a simply constructed and automatically acting safety gear with a working and a catching worm gear, which requires only a small construction effort.
  • the size, the number of individual parts and the weight should be reduced.
  • the usual bronze for the worm wheel is to be replaced by a more wear-resistant material.
  • the working worm and the catching worm which are arranged one behind the other on the common drive shaft, are in engagement with the helical worm wheel, which is fixed on the winding shaft in a rotationally fixed manner.
  • the working worm forms a non-rotatable unit with the drive shaft, while the catching worm, according to the invention, always runs unloaded via a driver and is axially displaceably mounted between housing-fixed stops to compensate for wear on the working worm. If the worm gear drive breaks, the self-locking worm gear supports the load against its stops.
  • a driver designed as a predetermined breaking point uncouples the catching screw from the drive shaft, so that the self-locking catching screw drive stops.
  • the helical worm gear is designed as an involute gear and made of case-hardened steel, the tooth flanks being ground, in contrast, the working and catching worms in a further embodiment of the invention consist of gray cast iron, with the aim of increasing the catching safety of the catching worm on the one hand and with consideration for a low-friction Working worm, on the other hand, comes into question for the spherical cast iron catching worm and gray cast iron for the working worm.
  • a safety device designed according to this technical teaching has the advantage of extremely low construction costs and weight, because in comparison to the prior art, a worm shaft and a worm wheel, including their bearings, have been eliminated.
  • the safety device designed according to the invention has a much better wear behavior, because the material previously used for the worm wheel bronze has been replaced by case hardening steel, so that there is even the possibility of using the worm wheel as a cutting wheel for the production of the two from gray or Ductile iron to use existing work and trap screws.
  • a drive shaft 4 is mounted with roller bearings 2, 3, which is driven by a - not shown - motor via a toothed belt 5 and a wedged drive pinion 6.
  • a worm 7 is non-rotatably and a catch worm 8 slidably arranged in the axial direction, both of which are designed as globoid half-worms.
  • the working worm 7 and the catching worm 8 mesh with a worm wheel 9, which is mounted with a hub 10 on roller bearings 11, 12 in the housing 1.
  • the hub 10 of the worm wheel 9 is connected to a winding shaft 13 for the power-operated gate (not shown).
  • the worm wheel 9 is designed as a helical gear so that it can mesh with the two globoid half-worms.
  • the catch screw 8 which is axially displaceably mounted on the drive shaft 4, is carried in the drive direction by a driver 14, the ends of which protrude into the elongated holes 15 of the catch screw 8.
  • the elongated holes 15 also determine the maximum axial displacement of the catching screw 8 in normal operation.
  • the catch worm 8 is provided with a circumferential stop groove 16, in which stop bolts 17, which are fixed to the housing, which prevent the catch worm 8 from disengaging from the worm wheel 9 in the event of a catch.
  • a revision cover 18 is arranged in the housing 1 above the working and catching screws 7, 8.
  • control worm 19 which meshes with a control worm wheel 20 for driving a control shaft for actuating limit switches.

Landscapes

  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Gear Transmission (AREA)
  • Barrages (AREA)
  • Gears, Cams (AREA)
EP85108652A 1984-09-13 1985-07-11 Dispositif de blocage de rotation Ceased EP0182968A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843433561 DE3433561C1 (de) 1984-09-13 1984-09-13 Fangvorrichtung
DE3433561 1984-09-13

Publications (2)

Publication Number Publication Date
EP0182968A2 true EP0182968A2 (fr) 1986-06-04
EP0182968A3 EP0182968A3 (fr) 1987-04-15

Family

ID=6245260

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85108652A Ceased EP0182968A3 (fr) 1984-09-13 1985-07-11 Dispositif de blocage de rotation

Country Status (2)

Country Link
EP (1) EP0182968A3 (fr)
DE (1) DE3433561C1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0275418A1 (fr) * 1986-12-05 1988-07-27 GfA-Antriebstechnik GmbH Dispositif d'actionnement

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2620485B1 (fr) * 1987-09-15 1989-12-01 Bubendorff Sa Dispositif d'entrainement, notamment pour volet roulant
DE202005018238U1 (de) 2005-11-22 2007-04-05 Sigl Elektromotoren Gmbh & Co. Kg Fangvorrichtung für Verschlussvorrichtung

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2222503B1 (de) * 1972-05-08 1973-09-06 Gfa Antriebstechnik Gmbh Selbsttaetig wirkende sperrvorrichtung zum verhindern eines ungewollten abrollens eines rolltores, rollgitters, rolladens od.dgl
DE3129648A1 (de) * 1981-07-28 1983-02-17 W. u. H. Neukirchen GmbH & Co KG, 4060 Viersen Antrieb fuer ein rolltor

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2222503B1 (de) * 1972-05-08 1973-09-06 Gfa Antriebstechnik Gmbh Selbsttaetig wirkende sperrvorrichtung zum verhindern eines ungewollten abrollens eines rolltores, rollgitters, rolladens od.dgl
DE3129648A1 (de) * 1981-07-28 1983-02-17 W. u. H. Neukirchen GmbH & Co KG, 4060 Viersen Antrieb fuer ein rolltor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0275418A1 (fr) * 1986-12-05 1988-07-27 GfA-Antriebstechnik GmbH Dispositif d'actionnement

Also Published As

Publication number Publication date
DE3433561C1 (de) 1986-03-20
EP0182968A3 (fr) 1987-04-15

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Inventor name: HAENSEL, DIETRICH, DR.-ING.

Inventor name: JARCHOW, FRIEDRICH, PROF. DR.-ING.

Inventor name: LEHMANN, SIEGFRIED