EP1616836A2 - Engin de levage - Google Patents

Engin de levage Download PDF

Info

Publication number
EP1616836A2
EP1616836A2 EP05015287A EP05015287A EP1616836A2 EP 1616836 A2 EP1616836 A2 EP 1616836A2 EP 05015287 A EP05015287 A EP 05015287A EP 05015287 A EP05015287 A EP 05015287A EP 1616836 A2 EP1616836 A2 EP 1616836A2
Authority
EP
European Patent Office
Prior art keywords
holding part
actuating
actuating part
support means
hoist according
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.)
Granted
Application number
EP05015287A
Other languages
German (de)
English (en)
Other versions
EP1616836A3 (fr
EP1616836B1 (fr
Inventor
Ralf Eising
Thilo Walloschek
Thorsten Sattler
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.)
Demag Cranes and Components GmbH
Original Assignee
Demag Cranes and Components 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 Demag Cranes and Components GmbH filed Critical Demag Cranes and Components GmbH
Publication of EP1616836A2 publication Critical patent/EP1616836A2/fr
Publication of EP1616836A3 publication Critical patent/EP1616836A3/fr
Application granted granted Critical
Publication of EP1616836B1 publication Critical patent/EP1616836B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B66D1/54—Safety gear
    • B66D1/56—Adaptations of limit switches
    • 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
    • B66D3/24—Applications of limit switches

Definitions

  • the invention relates to a hoist with a Abschalt driven and with an acting on the support means holding part, which actuates the disconnecting device, wherein the holding part comprises an actuating part for actuating the disconnecting device, the actuating part relative to the holding part in the pulling direction of the support means between an upper rest position and a lower stop position is slidably mounted, at least one elastic element between the actuating part and the holding part is arranged.
  • Such hoists are used for lifting and lowering loads by means of load-bearing means such as ropes or chains attached hooks.
  • the load hook is usually arranged rotatably in a load hook receptacle of a holding part.
  • the support means are non-positively connected via a Tragstoffbefestist with the holding part or the load hook receptacle in the holding part.
  • the attachment of the suspension element involves one or more deflection wheels, such as, for example, pocket wheels for chains around which the respective suspension element is deflected.
  • the lifting and lowering of such load hooks is usually controlled by manual operation of a switching element of the drive of the hoist. It is necessary to provide a shut-off device at the position of maximum lifting height, which also shuts off the hoist, for example in the carelessness of the operator to protect it from overloading and thus damage and / or to prevent a possible crash of the load hook together with load.
  • a limit switch for electric hoists is known, which is arranged at the end position of the stroke, ie on the underside of the hoist, so that the holding part of the tension member or the hook or the lower block when reaching the end position actuates the limit switch and so shuts off the power to the drive.
  • the holding part still carries out a certain trailing movement after actuation of the limit switch, resulting from the delay of the shutdown of Drive and its caster comes. Due to this caster, the holding part moves to the underside of the hoist and thus loads it unintentionally. Further, in a large caster, the support means is stretched and the transmission loaded because the holding part is stationary when applied to the underside of the hoist, but the drive still moves briefly and so "pulls" on the support means.
  • the object of the invention is therefore to provide a further hoist, in which the loads of the hoist, the suspension element or the transmission during hunting are further reduced or eliminated. Furthermore, the hoist should have no potential danger points and have protection against contamination of the shutdown device.
  • the holding part comprises an actuating part for actuating the disconnecting device, which is mounted displaceably relative to the holding part in the pulling direction of the support means, it is possible to further reduce the loads of the hoist, the suspension element or the transmission when running, since the follower path through the Displacement of the operating part is compensated.
  • the operating part in the form of a sleeve-shaped casing ensures protection for the holding part.
  • the actuating part not only adjoins the holding part but partially overlaps the operating part with the holding part in the pulling direction of the carrying means. Potential danger spots are thus covered even more safely
  • the actuating part has at least one opening for the passage of the suspension element and completely surrounds the suspension element transversely to its direction of pull.
  • This bell-shaped or sleeve-shaped form of the actuating part facilitates the overlapping of the danger points.
  • the actuating part relative to the holding part in the pulling direction of the support means is slidably mounted between an upper rest position and a lower stop position.
  • the upper rest position represents the "normal" position of the operating part. In her, the operating part relative to the holding part is maximally displaced or extended.
  • the height of the unit holding part operating part is formed by the sum of the individual heights of the holding part and the operating part minus their overlap. So she is in the upper resting position so maximum.
  • the lower stop position corresponds to the position of the actuating part after complete or maximum displacement of the actuating part relative to the holding part.
  • operating part and holding part largely overlap.
  • This position of the operating part is created by its displacement relative to the holding part, for example, when hitting the underside of the hoist and overcoming the caster track and a safety reserve.
  • the height of the unit holding part actuating part is minimal in this position due to the extensive overlap.
  • the actuating part projects in the upper rest position on the holding part in the pulling direction of the support means, ie upwards out.
  • the operating part for example, operate a limit switch for switching off the hoist, as is known from CH 423 149 and DE 100 14 913 A1.
  • the distance between the upper rest position and the lower stop position of the actuating part corresponds at least to the overtravel of the support means. Then the hoist is not loaded because, for example, the load hook does not hit the hoist or the free end is loaded. For safety reasons, however, the distance will be greater and include a safety margin.
  • the operating part should therefore be made displaceable relative to the holding part by an amount between 1 cm and 10 cm, as these are the sizes of conventional trailing paths.
  • the hoist comprises elastic elements, in particular spring elements, which supply the actuation force for the disconnection device. Furthermore, it is achieved that the operating part always in the output, d. H. in the upper position, as soon as it is unloaded. Thus, the optimal compensation of the trailing movement is always ensured.
  • the spring elements are preferably arranged between the holding part and the casing and are tensioned when the actuating part is displaced in the direction of travel relative to the holding part downwards.
  • the elastic elements are arranged between the operating part and the holding part in such a way that a contact between the elastic elements and the support means is avoided.
  • the elastic elements, in particular the spring elements no wear by the support means, in particular by the chain subjected.
  • the elastic elements are supported with one end in the region of the load hook receptacle on the holding part and with the other end to the load hook facing edge of the sleeve-shaped actuating member and the elastic elements both in the upper rest position and in the lower Stop position are covered to the outside of the holding part or the operating part.
  • the elastic elements are not freely accessible from the outside and do not pose a potential danger point. Furthermore, they do not come into direct contact with the environment, so that they are largely protected against contamination. Thus, a greater reliability is given.
  • the elastic elements or spring elements can be dimensioned smaller and therefore made more cost-effective, since the suspension elements are no longer guided through the elastic elements or spring elements, as is otherwise customary.
  • the actuating part is made of plastic.
  • the embodiment according to the invention is suitable both for single-stranded and for multi-strand hoists.
  • the support means is guided centrally or centrally through the actuating part for fastening in the holding part.
  • the holding part according to the invention may be provided both at the free end of the support means and at the load hook end.
  • the holding part can be part of a lower block, which comprises a deflection wheel, for example a pocket wheel for the suspension element.
  • the support means passes through the actuating member off-center, but in a plane with the guide wheel at two points, so has an "input” and an “output", which are aligned with the guide wheel.
  • the upper block 1 shows a bottom block 1 of a hoist.
  • the lower block 1 comprises a load hook 2, which is rotatably mounted on a holding part 3.
  • the holding part 3 is surrounded by an actuating part 4 in the form of a sheath, d. H.
  • the operating part 4 surrounds the circumference of the holding part 3 sleeve or bell-shaped and also covers the top.
  • the holding part 3 and the actuating part 4 are each longitudinally divided in two halves in the vertical direction. In FIG. 1, for better understanding, only the rear halves of the holding part 3 and the operating part 4 are shown.
  • the actuating part 4 the usual manner is operated on the underside of the chain hoist or arranged at the outlet of a chain storage shut-off device.
  • the bottom block 1 comprises a pocket wheel 5 arranged in the holding part 3 and thus between the halves of the holding part 3 and mounted in the halves, as well as a chain 9 which is deflected over it.
  • the chain 9 passes through a chain opening 7 in the chain Operating part 4, is guided around the pocket wheel 5 and exits through a further chain opening 8 from the operating part 4.
  • the chain openings 7 and 8 each have an approximately cross-shaped cross-section and thus also serve for chain guidance and Entftechtung.
  • the actuating part 4 of the lower bottle 1 is slidably mounted and fixed to the holding part 3 in the pulling direction of the load hook 2.
  • the slot 13 is in this case aligned with its longitudinal extent in the direction of displacement of the actuating part 4.
  • the actuating part 4 normally assumes the upper rest position indicated by "A" and shown in FIG. In this case, the actuating part 4 is displaced as far as possible relative to the holding part 3 or pulled out.
  • the height of the unit holding part 3 - operating part 4 - load hook 2 is formed by the sum of the individual heights of the holding part 3, the casing 4 and the load hook 2 minus their overlap. It is in the upper position A so maximum.
  • the lower stop position B is shown in Figure 3 and corresponds to the position of the actuating part 4 after complete or maximum displacement of the operating part 4 relative to the holding part 3.
  • the operating part 4 and holding part 3 overlap substantially.
  • This position of the operating part 4 is formed by displacement relative to the holding part 3 by hitting the shutdown device on the underside of the hoist and overcoming the overtravel including a safety reserve.
  • the height of the unit holding part 3 - operating part 4 - load hook 2 is minimal in this position due to the extensive overlap.
  • the difference in height between the two positions corresponds to the trailing path of the lower block 1, this still executes after actuation of the defeat by striking the operating part 4 until it finally comes to a standstill plus a safety reserve.
  • the stop position B is therefore not reached during normal operation of the hoist.
  • the actuator 4 will assume a position between the two positions A and B after displacement in normal operation.
  • the actuating part 4 is then further "pushed" from the rest position A on the holding part 3 and reaches, depending on the length of the follow-up path, a position between the rest position A and the stop position B.
  • the lower block 1 comprises springs 10, which provide the operating force for the switch of the cut-off device. Furthermore, it is achieved that the actuating part. 4 always in the initial, ie in the upper position A, as soon as it is unloaded, since the springs 10, the actuating part 4 and the holding part 3 are pushing apart.
  • the springs 10 are arranged between the actuating part 4 and the holding part 3, so that they are protected in the interior of the lower bottle 1.
  • the actuating part 4 in the region of the springs 10 is not shown continued.
  • the operating part 4 overlaps the holding part 3 in the region of the springs 10 in the rest position A.
  • the springs 10 are based on the one hand on the holding part 3 and on the other hand on the underside of the operating part 4 from.
  • the springs 10 are arranged in recesses 14, which are provided in the lower region of the holding part 3.
  • the side walls of the recesses 14 form boundaries for the displacement of the casing 4 down.
  • pins are provided for holding the springs 10 at the lower edge of the actuating part 4, on which the coil springs 10 are attached.
  • the actuating part 4 is divided as well as the holding part 3 of the lower block in two halves, which are assembled after insertion of the pocket wheel 5, the load hook 2 and so on.
  • the load hook 2 is fixed in on the holding part 3 via a load hook receptacle 6, wherein it is rotatable about its own axis.
  • the holding part 3 in the lower part of a corresponding recess 11, in which the head of the load hook 2, including pivot bearing and cover is used.
  • the operating part 4 has no supporting function. It only serves to guide the chain 9 and the suspension means and the compensation of the trailing movement and the shutdown of the lifting drive.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Load-Engaging Elements For Cranes (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Operating, Guiding And Securing Of Roll- Type Closing Members (AREA)
EP05015287A 2004-07-16 2005-07-14 Engin de levage Not-in-force EP1616836B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102004034588A DE102004034588A1 (de) 2004-07-16 2004-07-16 Hebezeug

Publications (3)

Publication Number Publication Date
EP1616836A2 true EP1616836A2 (fr) 2006-01-18
EP1616836A3 EP1616836A3 (fr) 2006-11-02
EP1616836B1 EP1616836B1 (fr) 2008-10-29

Family

ID=35058910

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05015287A Not-in-force EP1616836B1 (fr) 2004-07-16 2005-07-14 Engin de levage

Country Status (3)

Country Link
EP (1) EP1616836B1 (fr)
AT (1) ATE412606T1 (fr)
DE (2) DE102004034588A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7607707B2 (en) 2005-12-24 2009-10-27 Demag Cranes & Components Gmbh Load hook
US8608215B2 (en) 2009-04-11 2013-12-17 Demag Cranes & Components Gmbh Load-receiving means, in particular a hook block of a lifting gear
EP2876077A1 (fr) 2013-11-25 2015-05-27 Alstom Renovables España, S.L. Palan à chaîne
US11472683B2 (en) * 2019-01-24 2022-10-18 Dmitrijs Volohovs Winch

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101987713A (zh) * 2010-08-09 2011-03-23 无锡吉兴汽车声学部件科技有限公司 汽车顶篷水刀房切割治具起吊搬运机构

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH423149A (de) 1965-07-22 1966-10-31 Gis Ag Maschinenfabrik Endschalter an einem Elektro-Hebezeug
DE10014913A1 (de) 2000-03-17 2001-10-04 Mannesmann Ag Endabschalteinrichtung

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2274175A (en) * 1938-09-06 1942-02-24 Manning Maxwell & Moore Inc Electric hoist
US2778506A (en) * 1953-06-29 1957-01-22 Alliance Machine Co Hoist mechanisms
GB1440919A (en) * 1972-09-16 1976-06-30 Delta Designs New Southgate Lt Hoist

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH423149A (de) 1965-07-22 1966-10-31 Gis Ag Maschinenfabrik Endschalter an einem Elektro-Hebezeug
DE10014913A1 (de) 2000-03-17 2001-10-04 Mannesmann Ag Endabschalteinrichtung

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7607707B2 (en) 2005-12-24 2009-10-27 Demag Cranes & Components Gmbh Load hook
US8608215B2 (en) 2009-04-11 2013-12-17 Demag Cranes & Components Gmbh Load-receiving means, in particular a hook block of a lifting gear
EP2876077A1 (fr) 2013-11-25 2015-05-27 Alstom Renovables España, S.L. Palan à chaîne
WO2015075238A1 (fr) 2013-11-25 2015-05-28 Alstom Renewable Technologies Palan à chaîne
US11472683B2 (en) * 2019-01-24 2022-10-18 Dmitrijs Volohovs Winch

Also Published As

Publication number Publication date
EP1616836A3 (fr) 2006-11-02
ATE412606T1 (de) 2008-11-15
EP1616836B1 (fr) 2008-10-29
DE102004034588A1 (de) 2006-02-09
DE502005005781D1 (de) 2008-12-11

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