US3813958A - Locking device for a winding arrangement - Google Patents

Locking device for a winding arrangement Download PDF

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Publication number
US3813958A
US3813958A US00357339A US35733973A US3813958A US 3813958 A US3813958 A US 3813958A US 00357339 A US00357339 A US 00357339A US 35733973 A US35733973 A US 35733973A US 3813958 A US3813958 A US 3813958A
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US
United States
Prior art keywords
shaft
auxiliary
worm
locking device
main
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 - Lifetime
Application number
US00357339A
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English (en)
Inventor
H Meyer
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
Original Assignee
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 filed Critical GFA ANTRIEBSTECHNIK GmbH
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Publication of US3813958A publication Critical patent/US3813958A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F16H—GEARING
    • F16H1/00—Toothed gearings for conveying rotary motion
    • F16H1/02—Toothed gearings for conveying rotary motion without gears having orbital motion
    • F16H1/20—Toothed gearings for conveying rotary motion without gears having orbital motion involving more than two intermeshing members
    • F16H1/22—Toothed gearings for conveying rotary motion without gears having orbital motion involving more than two intermeshing members with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts
    • F16H1/222—Toothed gearings for conveying rotary motion without gears having orbital motion involving more than two intermeshing members with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts with non-parallel axes
    • F16H1/225—Toothed gearings for conveying rotary motion without gears having orbital motion involving more than two intermeshing members with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts with non-parallel axes with two or more worm and worm-wheel gearings
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/19—Gearing
    • Y10T74/19637—Gearing with brake means for gearing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/19—Gearing
    • Y10T74/19642—Directly cooperating gears
    • Y10T74/19698—Spiral
    • Y10T74/19828—Worm

Definitions

  • ABSTRACT A roller blindor the like is wound on a winding shaft by. means of a drive shaft, a worm on the latter and a worm gear fixed to the winding shaft, whereby the unwound portion of the blind will exert a moment of the winding shaft opposite to the moment imparted thereto by the drive shaft. This moment is counteracted by the self-locking worm drive between the drive shaft and the winding shaft.
  • a locking device comprising an auxiliary self-locking worm drive is provided which becomes active after destruction of the worm drive between the drive shaft and the winding shaft to prevent in such a case accidental lowering of the roll blind.
  • the present invention relates to a locking device for a winding arrangement for a roll blind or the like in which a worm wheel fixed to the winding shaft is driven by means of a self-locking worm 'on a drive shaft.
  • the winding shaft of a winding arrangement for'instance for roll blinds, roll doors or roll'gates are continuously subjected to the moment imparted thereto by the load which has to be moved in vertical plane.
  • a cost saving arrangement is derived if as drive for such winding arrangement a self-locking worm drive is used which acts not only to lift the load, but at the same time acts as a continous brake.
  • it is additionally required to provide a locking device which will positively prevent accidental downward movement of the load to be lifted if the braking action produced by the worm drive is not maintained, for instance due to destruction of the worm drive, after excessive wear of the teeth of the worm. While this danger may arise only after the winding arrangement has been used for years, this danger has to be positively prevented inthat usually the winding arrangement is not serviced or closely checked during years of use.
  • an auxiliary worm wheel is coaxially fixed to the main wheel on the winding shaft of the winding arrangement and the auxiliary worm wheel is in meshing engagement with an auxiliary self-locking worm on an auxiliary shaft which is axially shiftable within predetermined limits and which is driven from the drive shaft by means of a gear drive or the like which is interrupted when an increased turning moment is transmitted thereto.
  • the auxiliary worm is driven, during normal operation of the winding arrangement, without participating in the power transmission from the drive shaft to the winding shaft. Since the auxiliary shaft is axially mov-' able within certain limits, the latter, will be axially moved during wear of the teeth of the worm on the drive shaft so that such wear of the teeth of the drive shaft will be compensated by axially shifting of the auxiliary shaft.
  • the auxiliary worm will act as a brake when, for instance, the teeth of the worm on the drive shaft will be destru'cted by excessive wear.
  • the turning moment of the drive shaft will be transmitted by the gear transmission between the drive shaft and the auxiliary shaft onto the latter so that the auxiliary shaft will then either axial move until one end engages an appropriate stop so that the gears of the transmission between the drive shaft and the auxiliary shaft will become disengaged from each other, or one of the gears of the transmission may be fixed to the respective shaft by means which break upon transmission of an increased moment so that transmission of a force by this transmission means will likewise be interrupted.
  • the auxiliary worm and worm gear will now act as a brake so that accidental lowering of a partially wound up roll blind or the like positively prevented while the drive from the drive shaft to the winding shaft is interrupted so that the operator will know that the main worm or the main worm gearis excessively worn and has to be replaced.
  • FIG. 1 is a'partially sectioned, partial end view of the winding arrangement with the locking device according to the present invention
  • FIG. 2 is a cross section taken along the line IlII of FIG. 1;
  • FIG. 3 is a cross section taken along the line III-Ill of FIG. 2.
  • the winding arrangement with the locking device comprises a housing 1 in which a winding shaft 2, only partially shown in FIG.'2, is turnably mounted which serves to wind a roll blind or the like, not shown in the drawing, thereon during turning of the winding shaft in one direction.
  • a wheel body 4 Coaxially fixed to the winding shaft 2 by means of a key 3 is a wheel body 4 which is provided on part of its outer periphery with the teeth of an auxiliary worm wheel 4a integrally cast with the wheel body 4.
  • the wheel body 4 carries further fixed thereto in the region of its outer periphery and laterally of the auxiliary worm 4a a gear ring 5 in which the teeth of a main worm wheel are exactly machined.
  • An auxialiary worm 6 mehes with the teeth of the auxiliary worm wheel 4a, and the auxiliary worm 6 is integrally formed on an auxiliary shaft having ends of reduced diameter 6a which are turnably mounted in roller bearings 7 and 8 in the housing 1 and axially movably between fixed stops 9 and 10.
  • Meshing with the teeth of the main worm wheel 5 is a main worm .11 integrally formed on a main shaft.
  • One end 11a of the main shaft is turnably mounted in the bearing 12, and the other end 11b forms a drive shaft connected to a prime mover, not shown in the drawing and is mounted in the bearing 13 in the housing.
  • the bearings l2 and 13 are constructed to take up the axial pressure the drive shaft is subjected to during operation of the winding arrangement.
  • a gear 14 is coaxially fixed to the main drive shaft and this gear meshes with an additional gear 15 coaxially fixed to the auxiliary shaft.
  • the gear ratio of the gears 14 and 15 and that of the auxiliary worm 6 to the auxiliary worm wheel 4a is chosen in such a manner that the auxiliary worm will freely rotate with the main worm wheel 5 without participating in the power transmission between the drive shaft and'the'winding shaft.
  • the gear 15 will become disengaged from the gear 14 so that the drive from the drive lllb to the winding shaft 2 will be interrupted while self-locking auxiliary worm 6 will cooperate with the auxiliary worm wheel 4a to act as a brake.
  • the auxiliary worm 6 will therefore act only when the drive between the main worm 11 and the main worm wheel 5 is destroyed due to excessive wear, and the auxiliary worm 6, will turn during normal operating conditions without participating in the power transmission between the drive shaft and the winding shaft.
  • the teeth of the auxiliary worm wheel 4a and those of the auxiliary worm 6 need therefore not be very exactly machined.
  • the arrangement may also be made in such a manner that for instance the gear 15 is connected to the portion 6a of the auxiliary shaft by means of a set screw, not shown in the drawing, constructed to break when an increased turning moment'is transmitted between the gears 15 and 14.
  • a set screw not shown in the drawing, constructed to break when an increased turning moment'is transmitted between the gears 15 and 14.
  • the turning of the main shaft may also be transmitted to the auxiliary shaft by a chain drive.
  • a locking device for a winding mechanism comprising, in combination, support means; a winding shaft tumably mounted on said support means for winding a roller blind or the like thereon; a main worm wheel connected to said winding shaft for rotation therewith; a drive shaft tumably mounted on said support means; a self-locking main worm gear on said drive shaft and meshing with said main worm wheels; an auxiliary worm wheel connected to said winding shaft for rotation therewith; an auxiliary shaft turnably and axially shiftable within predetermined limits mounted on said support means; a self-locking auxiliary worm gear fixed to said auxiliary shaft and meshing with said auxiliary worm wheel; and transmission means between said drive shaft and said auxiliary shaft for driving the latter at a fixed ratio so that said auxiliary shaft and said worm gear thereon rotates freely without participating in the power transmission from the drive shaft to said winding shaft, said transmission means being constructed to interrupt the drive from the drive shaft to said auxiliary shaft, when, due to excessive wear of said main worm wheel and said main
  • said transmission means comprises a pair of gears fixed to said drive shaft and said auxiliary shaft, said gears normally meshing with each other and being axially displaced from each other to be out of engagement upon axial movement of said auxiliary shaft when an increased moment is transmitted to the latter.
  • a locking device as defined in claim 1, wherein said support comprises a housing enclosing said worm wheels, said worms and said transmission means.
  • auxiliary worm wheel comprises a cast wheel body having integrally cast gear teeth on its periphery and wherein said main worm wheel comprises a gear ring fixed to said wheel body with precision machined gear teeth.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Gear Transmission (AREA)
  • Operating, Guiding And Securing Of Roll- Type Closing Members (AREA)
  • Gears, Cams (AREA)
  • Transmission Devices (AREA)
US00357339A 1972-05-08 1973-05-04 Locking device for a winding arrangement Expired - Lifetime US3813958A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2222503A DE2222503C2 (de) 1972-05-08 1972-05-08 Selbsttaetig wirkende Sperrvorrichtung zum Verhindern eines ungewollten Abrollens eines Rolltores,Rollgitters,Rolladens od.dgl.

Publications (1)

Publication Number Publication Date
US3813958A true US3813958A (en) 1974-06-04

Family

ID=5844368

Family Applications (1)

Application Number Title Priority Date Filing Date
US00357339A Expired - Lifetime US3813958A (en) 1972-05-08 1973-05-04 Locking device for a winding arrangement

Country Status (13)

Country Link
US (1) US3813958A (sv)
JP (1) JPS5328702B2 (sv)
AT (1) AT330429B (sv)
BE (1) BE795487A (sv)
CH (1) CH555971A (sv)
DE (1) DE2222503C2 (sv)
DK (1) DK135238C (sv)
FR (1) FR2183684B1 (sv)
GB (1) GB1398701A (sv)
IT (1) IT979042B (sv)
NL (1) NL7305804A (sv)
NO (1) NO134762C (sv)
SE (1) SE383028B (sv)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4238969A (en) * 1978-05-26 1980-12-16 Klafft & Kluppelholz Mechanical gearing for roller blinds and awnings
US4503899A (en) * 1981-12-16 1985-03-12 Security Shutter Corp. Locking means for gear drive
US4586393A (en) * 1984-03-07 1986-05-06 Quick-Set Incorporated Minimum fit worm and gear drive
US5042749A (en) * 1990-04-10 1991-08-27 Sundstrand Corporation Mechanism for limiting rotation of a rotatably mounted shaft
ES2130875A1 (es) * 1994-03-03 1999-07-01 Forjas Del Vinalopo Sl Perfeccionamientos para fines de carrera en ejes de enrollamiento de persianas.
EP0994032A1 (en) * 1998-10-14 2000-04-19 SASIB TOBACCO S.p.A. Safety drive unit, in particular for the movement of protection screens in manufacturing machines and protection screen for automatic manufacturing machines
WO2001044683A1 (en) * 1999-12-14 2001-06-21 Vkr Holding A/S Transmission
US20070143964A1 (en) * 2005-11-22 2007-06-28 Wolfgang Mittermeyer Arrester device for a closing apparatus
US20110236135A1 (en) * 2008-09-16 2011-09-29 Verderg Limited Method and apparatus for installing tidal barrages
US20120000305A1 (en) * 2009-03-10 2012-01-05 Illinois Tool Works Inc. Hybrid enveloping spiroid and worm gear
US20130061704A1 (en) * 2011-09-09 2013-03-14 Illinois Tool Works Inc. Enveloping spiroid gear assemblies and method of manufacturing the same
CN108626314A (zh) * 2018-07-07 2018-10-09 嘉兴易控智能科技有限公司 一种用于蜗轮蜗杆减速机的断齿安全机构

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5439811B2 (sv) * 1973-12-28 1979-11-30
DE2557726C3 (de) * 1975-12-20 1980-09-11 Stopinc Ag, Zug (Schweiz) Vorrichtung zum Auswechseln von Gießrohren
JPS5644785Y2 (sv) * 1976-09-18 1981-10-20
DE3129648C2 (de) * 1981-07-28 1985-05-30 W. u. H. Neukirchen GmbH & Co KG, 4060 Viersen Sicherungsvorrichtung gegen ungewolltes Abrollen eines Rolltores
DE3201707C2 (de) * 1982-01-21 1989-01-12 Fa. W.u.H. Neukirchen, 4060 Viersen Antrieb für Rolltore
DE3300215A1 (de) * 1983-01-05 1984-07-12 Fa. W.u.H. Neukirchen, 4060 Viersen Antrieb fuer rolltore
DE3433561C1 (de) * 1984-09-13 1986-03-20 GfA - Antriebstechnik GmbH, 4000 Düsseldorf Fangvorrichtung
DE3433562C2 (de) * 1984-09-13 1986-09-18 GfA - Antriebstechnik GmbH, 4000 Düsseldorf Fangvorrichtung
DE3539659A1 (de) * 1985-11-08 1987-05-14 Alten K Antrieb von absturzgefaehrdeten verschlusselementen fuer tore od. dgl. an gebaeuden
DE3645081C2 (en) * 1986-07-03 1990-02-15 Hoermann Kg Bielefeld, 4800 Bielefeld, De Roller shutter safety device preventing out-of-control descent
DE3622436A1 (de) * 1986-07-03 1988-01-28 Hoermann Kg Absturzsicherung fuer ein rolltor
DE3641654A1 (de) * 1986-12-05 1988-06-16 Gfa Antriebstechnik Gmbh Betaetigungsvorrichtung
DE29502273U1 (de) * 1995-02-13 1996-09-26 GfA - Antriebstechnik GmbH, 40549 Düsseldorf Getriebe mit selbsttätig wirkender Fangvorrichtung
CN104889790A (zh) * 2015-05-19 2015-09-09 深圳市鑫运祥精密刀具有限公司 一种数控减速联动装置及加工方法
CN109779510A (zh) * 2019-03-08 2019-05-21 湖北思泽新能源科技有限公司 一种转臂式卷帘门防坠装置
CN109750971B (zh) * 2019-03-21 2020-04-03 湖北思泽新能源科技有限公司 旋转杆式卷帘门防坠装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3635100A (en) * 1970-04-15 1972-01-18 Dura Corp Motor drive assembly for window regulators
US3722311A (en) * 1971-11-26 1973-03-27 Lynor Eng Inc Window operator

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3635100A (en) * 1970-04-15 1972-01-18 Dura Corp Motor drive assembly for window regulators
US3722311A (en) * 1971-11-26 1973-03-27 Lynor Eng Inc Window operator

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4238969A (en) * 1978-05-26 1980-12-16 Klafft & Kluppelholz Mechanical gearing for roller blinds and awnings
US4503899A (en) * 1981-12-16 1985-03-12 Security Shutter Corp. Locking means for gear drive
US4586393A (en) * 1984-03-07 1986-05-06 Quick-Set Incorporated Minimum fit worm and gear drive
US5042749A (en) * 1990-04-10 1991-08-27 Sundstrand Corporation Mechanism for limiting rotation of a rotatably mounted shaft
ES2130875A1 (es) * 1994-03-03 1999-07-01 Forjas Del Vinalopo Sl Perfeccionamientos para fines de carrera en ejes de enrollamiento de persianas.
EP0994032A1 (en) * 1998-10-14 2000-04-19 SASIB TOBACCO S.p.A. Safety drive unit, in particular for the movement of protection screens in manufacturing machines and protection screen for automatic manufacturing machines
WO2001044683A1 (en) * 1999-12-14 2001-06-21 Vkr Holding A/S Transmission
US20070143964A1 (en) * 2005-11-22 2007-06-28 Wolfgang Mittermeyer Arrester device for a closing apparatus
US7669499B2 (en) * 2005-11-22 2010-03-02 Sigl Elektromotoren Gmbh & Co. Kg Arrester device for a closing apparatus
US20110236135A1 (en) * 2008-09-16 2011-09-29 Verderg Limited Method and apparatus for installing tidal barrages
US20120000305A1 (en) * 2009-03-10 2012-01-05 Illinois Tool Works Inc. Hybrid enveloping spiroid and worm gear
US20130061704A1 (en) * 2011-09-09 2013-03-14 Illinois Tool Works Inc. Enveloping spiroid gear assemblies and method of manufacturing the same
CN108626314A (zh) * 2018-07-07 2018-10-09 嘉兴易控智能科技有限公司 一种用于蜗轮蜗杆减速机的断齿安全机构
CN108626314B (zh) * 2018-07-07 2023-09-01 嘉兴易控智能科技有限公司 一种用于蜗轮蜗杆减速机的断齿安全机构

Also Published As

Publication number Publication date
DE2222503C2 (de) 1974-04-18
SE383028B (sv) 1976-02-23
NL7305804A (sv) 1973-11-12
DE2222503B1 (de) 1973-09-06
NO134762B (sv) 1976-08-30
GB1398701A (en) 1975-06-25
JPS5328702B2 (sv) 1978-08-16
CH555971A (de) 1974-11-15
DK135238C (da) 1977-08-29
NO134762C (sv) 1976-12-08
DK135238B (da) 1977-03-21
IT979042B (it) 1974-09-30
FR2183684B1 (sv) 1976-05-21
JPS4948046A (sv) 1974-05-09
BE795487A (fr) 1973-05-29
ATA109573A (de) 1975-09-15
DE2222503A1 (sv) 1973-09-06
AT330429B (de) 1976-06-25
FR2183684A1 (sv) 1973-12-21

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