DE9413618U1 - Hoist - Google Patents
HoistInfo
- Publication number
- DE9413618U1 DE9413618U1 DE9413618U DE9413618U DE9413618U1 DE 9413618 U1 DE9413618 U1 DE 9413618U1 DE 9413618 U DE9413618 U DE 9413618U DE 9413618 U DE9413618 U DE 9413618U DE 9413618 U1 DE9413618 U1 DE 9413618U1
- Authority
- DE
- Germany
- Prior art keywords
- worm
- worm shaft
- housing
- hoist according
- shaft
- 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
Links
- 230000036316 preload Effects 0.000 claims description 4
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 244000309464 bull Species 0.000 claims description 2
- 238000006073 displacement reaction Methods 0.000 description 3
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
Classifications
-
- 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
-
- 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
-
- 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
- F16H1/04—Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members
- F16H1/12—Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members with non-parallel axes
- F16H1/16—Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members with non-parallel axes comprising worm and worm-wheel
-
- 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
- F16H35/00—Gearings or mechanisms with other special functional features
- F16H35/10—Arrangements or devices for absorbing overload or preventing damage by overload
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
- H02K11/21—Devices for sensing speed or position, or actuated thereby
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
- H02K11/24—Devices for sensing torque, or actuated thereby
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
- H02K7/116—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears
- H02K7/1163—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears where at least two gears have non-parallel axes without having orbital motion
- H02K7/1166—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears where at least two gears have non-parallel axes without having orbital motion comprising worm and worm-wheel
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Gear Transmission (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Description
HubwerkHoist
Die Erfindung betrifft ein Hubwerk nach dem Oberbegriff des Anspruchs 1.The invention relates to a lifting device according to the preamble of claim 1.
Ein derartiges Hubwerk beispielsweise für Leuchtenhänger, Kulissenzüge od.dgl., wie sie in Funk- und Fernsehstudios verwendet werden, ist aus dem DE-GM 94 00 232 bekannt, das ein selbsthemmendes Schneckengetriebe verwendet, dessen Schneckenwelle in einem Gehäuse über Radialwälzlager gelagert ist, die überdimensioniert sind, wobei das an der dem durch die Hublast beaufschlagbaren Ende der Schneckenwelle abgekehrten Ende befindliche Radialwälzlager derart federvorgespannt ist, daß das Reibmoment der Radialwälzlager bis zur zulässigen Maximallast im wesentlichen unabhängig von der angehängten Hublast ist. Hierdurch wird eine Zusatzbelastung der Lager vorgenommen, die die Betriebsdauer beeinträchtigt. Außerdem ist die Genauigkeit, mit der ein Ansprechen bei Überschreitung einer vorgeschriebenen Maximallast erfolgt, ungenügend.Such a lifting mechanism, for example for light hangers, backdrop hoists or similar, as used in radio and television studios, is known from DE-GM 94 00 232, which uses a self-locking worm gear, the worm shaft of which is mounted in a housing via radial roller bearings that are oversized, whereby the radial roller bearing located at the end of the worm shaft facing away from the end that can be subjected to the lifting load is spring-loaded in such a way that the friction torque of the radial roller bearings is essentially independent of the attached lifting load up to the permissible maximum load. This places an additional load on the bearings, which impairs the service life. In addition, the accuracy with which a response occurs when a prescribed maximum load is exceeded is insufficient.
Aufgabe der Erfindung ist es, ein Hubwerk nach dem Oberbegriff des Anspruchs 1 zu schaffen, das es ermöglicht, dauerhaft und mitThe object of the invention is to provide a lifting mechanism according to the preamble of claim 1, which makes it possible to permanently and with
• &iacgr; ·•&iacgr; ·
·♦ ·■·♦ ·■
guter Genauigkeit ein Anheben bei überschreiten einer maximal zulässigen Last zu verhindern.good accuracy to prevent lifting when a maximum permissible load is exceeded.
Diese Aufgabe wird entsprechend dem kennzeichnenden Teil des Anspruchs 1 gelöst.This object is achieved according to the characterizing part of claim 1.
Weitere Ausgestaltungen der Erfindung sind der nachfolgenden Beschreibung und den Unteransprüchen zu entnehmen.Further embodiments of the invention can be found in the following description and the dependent claims.
Die Erfindung wird nachstehend anhand eines beigefügten Ausführungsbeispiels näher erläutert, das ein Hubwerk schematisiert und teilweise im Schnitt zeigt.The invention is explained in more detail below using an attached embodiment example, which shows a lifting mechanism schematically and partly in section.
Das dargestellte Hubwerk beispielsweise für Leuchtenhänger, Kulissenzüge od.dgl. umfaßt einen elektrischen Antriebsmotor 1, etwa einem Drehstromasynchronmotor, der an einem Gehäuse 2 angeflanscht ist. Das Gehäuse 2 nimmt benachbart zum Antriebsmotor 1 eine axial verschiebliche Kupplung 3, beispielsweise eine Zahn- oder Scheibenkupplung od. dgl., auf, die die Welle des Antriebsmotors 1 mit einer Schneckenwelle 4 eines Schneckengetriebes koppelt.The lifting mechanism shown, for example for light hangers, sliding blocks or the like, comprises an electric drive motor 1, for example a three-phase asynchronous motor, which is flanged to a housing 2. The housing 2 accommodates an axially displaceable coupling 3 adjacent to the drive motor 1, for example a toothed or disc coupling or the like, which couples the shaft of the drive motor 1 to a worm shaft 4 of a worm gear.
Die Schneckenwelle 4 trägt eine zylindrische Schnecke 5 und ist über (geringfügig mit Spiel behaftete) Wälzlager 6 in dem Gehäuse 2 axial verschieblich gelagert. Die Schnecke 5 steht mit einem Schneckenrad 7 in Eingriff, an dessen Abtriebswelle 8 eine Hublast beispielsweise über eine Seilscheibe 9 od. dgl. angreift.The worm shaft 4 carries a cylindrical worm 5 and is mounted in the housing 2 so that it can move axially via roller bearings 6 (which have a slight amount of play). The worm 5 is in engagement with a worm wheel 7, on whose output shaft 8 a lifting load acts, for example via a pulley 9 or the like.
Zwischen der Schnecke 5 und dem Gehäuse 2 (bzw. einem Innenring eines der Wälzlager 6) ist ein Tellerfederpaket 10 angeordnet, und zwar an der Seite, daß die Schneckenwelle 4 entgegen der Richtung, in die das durch die Hublast auf das Schneckenrad 7 ausgeübte, in Pfeilrichtung wirkende Drehmoment axial auf die Schnecke 5 einwirkt, federvorgespannt ist. An der anderen Seite ist zwischen der Schnecke 5 und dem Gehäuse 2 (bzw. einem Innenring des anderen Wälzlagers 6) ein Abstützring 11 angeordnet, der ein Verschieben der Schneckenwelle 4 durch das Tellerfederpaket 10 aus seiner Mittel lage heraus entgegen der durch das Drehmoment bewirkten Axialkraft verhindert.A disc spring assembly 10 is arranged between the worm 5 and the housing 2 (or an inner ring of one of the roller bearings 6), specifically on the side that the worm shaft 4 is spring-loaded against the direction in which the torque exerted on the worm wheel 7 by the lifting load and acting in the direction of the arrow acts axially on the worm 5. On the other side, a support ring 11 is arranged between the worm 5 and the housing 2 (or an inner ring of the other roller bearing 6), which prevents the worm shaft 4 from being displaced from its central position by the disc spring assembly 10 against the axial force caused by the torque.
Auf dem freien Ende der Schneckenwelle 4 sitzt ein ringförmiger Betätiger 12, der justierbar mit der Schneckenwelle 4 verbunden ist. Der Betätiger 12 besitzt eine schräge Schulter 13 zur RadialverschiebungOn the free end of the worm shaft 4 there is a ring-shaped actuator 12 which is adjustably connected to the worm shaft 4. The actuator 12 has an inclined shoulder 13 for radial displacement
einer Betätigungskugel 14 bei entsprechender Axialverschiebung der Schneckenwelle 4 infolge der Einwirkung einer genügend großen, die Federvorspannung überwindenden Hublast. Die Betätigungskugel 14 ist in einer Führung 15 radial verschiebbar, die an einem Endschalter 16 angebracht ist, der durch die Betätigungskugel 14 betätigbar ist.an actuating ball 14 with a corresponding axial displacement of the worm shaft 4 as a result of the effect of a sufficiently large lifting load that overcomes the spring preload. The actuating ball 14 can be moved radially in a guide 15 that is attached to a limit switch 16 that can be actuated by the actuating ball 14.
Die durch das Tellerfederpaket 10 auf die Schneckenwelle 4 ausgeübte Federvorspannung ist derart gewählt, daß dann, wenn die angehängte Hublast einen vorbestimmten Höchstwert überschreitet, das hiervon ausgeübte Drehmoment als Axialkraft auf die Schneckenwelle 4 einwirkend letztere gegen die Federvorspannung axial verschiebt, wodurch der Betätiger 12 die Betätigungskugel 14 in Richtung auf den Endschalter 16 radial verschiebt und hierdurch diesen betätigt. Das so erzeugte Signal wird zum sofortigen Stillsetzen des Antriebsmotors 1 verwendet, so daß ein Anheben der unzulässig hohen Hublast verhindert wird.The spring preload exerted by the disc spring package 10 on the worm shaft 4 is selected such that when the attached lifting load exceeds a predetermined maximum value, the torque exerted by this acts as an axial force on the worm shaft 4 and axially displaces the latter against the spring preload, whereby the actuator 12 radially displaces the actuating ball 14 in the direction of the limit switch 16 and thereby actuates it. The signal generated in this way is used to immediately stop the drive motor 1, so that lifting of the impermissibly high lifting load is prevented.
Die axiale Verschiebung der Schneckenwelle 4 ist proposrtional zur Last über die Federkennlinie. Zu Beginn des Anhebens ergibt sich infolge der zu überwindenden Trägheitskräfte eine überhöhung des Drehmomentes. Hierdurch läßt sich eine sehr genaue Einhaltung des zulässigen Maximalwertes der Hublast erzielen.The axial displacement of the worm shaft 4 is proportional to the load via the spring characteristic curve. At the beginning of the lifting, the torque is increased due to the inertia forces that have to be overcome. This allows the permissible maximum value of the lifting load to be adhered to very precisely.
Greift die Hublast an der anderen Seite der Seilscheibe 9 an, sind das Tellerfederpaket 10 und der Abstützring 11 zu vertauschen und der Betätiger 12 ist umzudrehen.If the lifting load acts on the other side of the cable pulley 9, the disc spring assembly 10 and the support ring 11 must be swapped and the actuator 12 must be turned over.
Wenn wie im dargestellten Ausführungsbeispiel als Wälzlager 6 Axialdruckkugel lager verwendet werden, bekommt das benachbart zu dem Abstützring 11 befindliche bei axialer Verschiebung der Schneckenwelle 4 Spiel. Dies kann durch ein schwaches Tellerfederpaket 17, das zwischen dem Gehäuse 2 und dem Außenring des Druckkugellagers angeordnet ist, verhindert werden.If, as in the embodiment shown, axial thrust ball bearings are used as rolling bearings 6, the bearing adjacent to the support ring 11 will develop play when the worm shaft 4 is axially displaced. This can be prevented by a weak disc spring assembly 17 arranged between the housing 2 and the outer ring of the thrust ball bearing.
Claims (6)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4425272A DE4425272C2 (en) | 1994-07-18 | 1994-07-18 | Hoist |
Publications (1)
Publication Number | Publication Date |
---|---|
DE9413618U1 true DE9413618U1 (en) | 1994-10-20 |
Family
ID=6523419
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE4425272A Expired - Fee Related DE4425272C2 (en) | 1994-07-18 | 1994-07-18 | Hoist |
DE9413618U Expired - Lifetime DE9413618U1 (en) | 1994-07-18 | 1994-07-18 | Hoist |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE4425272A Expired - Fee Related DE4425272C2 (en) | 1994-07-18 | 1994-07-18 | Hoist |
Country Status (1)
Country | Link |
---|---|
DE (2) | DE4425272C2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1999017704A1 (en) * | 1997-10-03 | 1999-04-15 | Bhm Medical Inc. | A person lowering and raising winch assembly |
DE19503129C2 (en) * | 1995-02-01 | 2000-11-30 | Rhein Getriebe Gmbh | Hoist |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004054890B3 (en) * | 2004-11-12 | 2006-06-08 | Hoffmann Fördertechnik GmbH Wurzen | Dynamic selflocking electric chain hoist with overload protection e.g. for light hangers, changing scenery, propelled over drive pinion and reduction gear transmission with electrical driving motor |
DE102007041797A1 (en) * | 2007-08-30 | 2009-03-05 | Brose Fahrzeugteile Gmbh & Co. Kg, Hallstadt | Drive unit for an adjusting device of a motor vehicle |
CN104384011B (en) * | 2014-11-05 | 2017-06-13 | 江西稀有金属钨业控股集团有限公司 | A kind of method of spiral classifier and its lift-bolt |
CN111012931A (en) * | 2020-01-21 | 2020-04-17 | 梁国莉 | Portable multifunctional medical ultraviolet lamp |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1997839U (en) * | 1968-07-18 | 1968-12-05 | Broehl Ohg Maschf | PALLELESS HANGER WINCH. |
DE9400232U1 (en) * | 1994-01-08 | 1994-03-03 | Rhein-Getriebe GmbH, 40667 Meerbusch | Worm gear |
-
1994
- 1994-07-18 DE DE4425272A patent/DE4425272C2/en not_active Expired - Fee Related
- 1994-07-18 DE DE9413618U patent/DE9413618U1/en not_active Expired - Lifetime
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19503129C2 (en) * | 1995-02-01 | 2000-11-30 | Rhein Getriebe Gmbh | Hoist |
WO1999017704A1 (en) * | 1997-10-03 | 1999-04-15 | Bhm Medical Inc. | A person lowering and raising winch assembly |
US6085368A (en) * | 1997-10-03 | 2000-07-11 | Bhm Medical Inc. | Person lowering and raising winch assembly |
Also Published As
Publication number | Publication date |
---|---|
DE4425272C2 (en) | 2000-11-02 |
DE4425272A1 (en) | 1996-01-25 |
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