EP0663369B1 - Hoisting device - Google Patents

Hoisting device Download PDF

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Publication number
EP0663369B1
EP0663369B1 EP19940119515 EP94119515A EP0663369B1 EP 0663369 B1 EP0663369 B1 EP 0663369B1 EP 19940119515 EP19940119515 EP 19940119515 EP 94119515 A EP94119515 A EP 94119515A EP 0663369 B1 EP0663369 B1 EP 0663369B1
Authority
EP
European Patent Office
Prior art keywords
hoisting
chain
power transmission
hoist
driving
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
EP19940119515
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0663369A1 (en
Inventor
Ismo Kuivamäki
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.)
Konecranes PLC
Original Assignee
KCI Konecranes International Oy
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 KCI Konecranes International Oy filed Critical KCI Konecranes International Oy
Publication of EP0663369A1 publication Critical patent/EP0663369A1/en
Application granted granted Critical
Publication of EP0663369B1 publication Critical patent/EP0663369B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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

Definitions

  • the present invention relates to a device for the hoisting of a load, designed to be used in connection with a hoist equipped with a driving power transmission gear, said device being provided with at least two hoisting elements.
  • Hoists equipped with a driving power transmission gear include e.g. chain hoists.
  • Chain hoists are typically used as hoisting machines in a small-load range, i.e. for loads of about 100 kg... 2000 kg, at low hoisting speeds and low hoisting heights.
  • there are two types of chain hoist In one type, both ends of the shaft of the chain wheel are provided with a bearing, whereas in the other type one end of the chain wheel shaft is free. Chain hoists are favoured because of their advantageous price and small size. A small size is possible because the chain hoist has no drum but instead the hoisting chain "reeled" up is gathered into a container provided in conjunction with the hoist.
  • chain hoists use two driving chain wheels mounted on the same shaft.
  • One or both of the chains is then passed around one or more diverting pulleys to bring the load hooks to a suitable distance from each other.
  • This construction works well in itself, but the shafts of the driving chain wheels are subjected to a bending stress due to the pull of the load. This imposes a limit to the size of the load to be hoisted, even though the motor and gear system of the chain hoist itself have a sufficient capacity.
  • the US-A-4,114,855 shows a hoisting device with a main driving shaft that drives at least one more shaft for guiding the hoist chain to which the load is suspended, so that the problem of a dangling tail end can be eliminated.
  • the main driving shaft can be driven by an electric or hydraulic motor.
  • the DE 35 11 656 A1 shows a device with two lifting means for lifting and lowering elongated loads in a horizontal orientation via a motor driven chain hoist.
  • a power loop is provided to synchronize both lifting means.
  • this device cannot eliminate a subjected bending stress to driving chain wheels.
  • the object of the present invention is to eliminate some of the drawbacks of previously known technology.
  • the device of the invention is characterized by what is presented in the characterization part of claim 1.
  • Other embodiments of the invention are characterized by what is said in the other claims.
  • the invention provides the advantage that it can be used in connection with standard chain hoists as there is no need to add another driving chain wheel to the chain hoist.
  • the invention also makes it possible to avoid imposing an extra bending stress on the shaft of the driving chain wheel.
  • a further advantage is that, by varying the diameters of the driven chain wheel and the wheels driving the hoisting chain of the device, the hoisting speed and therefore also the size of the permitted load can be varied.
  • providing the structure of the invention with two or more hoisting chains can be implemented in a reasonable way.
  • Fig. 3 illustrates the arrangement of the chain wheels of the device of the invention.
  • Fig. 1 shows a typcial solution according to known technology for simultaneous hoisting with two hoisting chains using one chain hoist.
  • the chain hoist 1 is fixed to a hoisting trolley 3 by means of fixing elements 2.
  • the trolley 3 moves on wheels 4 along a track 5.
  • the hoist is provided with a driving double chain wheel 6 mounted on a shaft 7.
  • One end of the first and second hoisting chains 8 and 9 are attached to the load 10 (hoisting chain 9 by the intermediate of pulleys 13 and 12) and the chains are then passed around one of the wheels of the double chain wheel 6 to a chain box 11.
  • the forces F1 and F2 exerted on the chains by the motion and hoisting act on the shaft 7 of the driving double chain wheel 6.
  • a disadvantage with this previously known structure is the bending of the shaft 7 caused by the forces F1 and F2.
  • the figure presents a hoist in which the driving double chain wheel is placed inside the hoist, but such a structure cannot be implemented in all hoists because of insufficient space. If the driving chain wheel is placed at one end of the hoist, providing the hoist with a double chain wheel is easier but the longer shaft involved means that the load 10 generates a still larger bending moment on the shaft 7.
  • Providing previously known chain hoists with more than two driving chain wheels leads to unreasonable solutions due to the shaft length required.
  • Fig. 2 presents a hoist 101 with a driving power transmission gear and a device 103 according to the invention, provided with two hoisting chains 108 and 109.
  • a "hoist 101 with a driving power transmission gear” means a hoist without a drum. An example is the chain hoist.
  • the hoist 101 is attached by means of fixing elements 102 to the device 103, which moves on wheels 104 along a track 105.
  • the hoist 101 and the device 103 constitute a hoisting apparatus 121.
  • the hoist 101 has a driving power transmission gear 106 mounted either inside the hoist as in the figure or at one end of the hoist.
  • the device 103 Mounted near the driving power transmission gear of the hoist 101, the device 103 has a driven power transmission gear 114. Mounted on the shaft of this gear 114, there are two further driving gears 115 and 116 for moving the hoisting elements 108 and 109 for the hoisting of the load 110.
  • the driving power transmission gear 106 and the driven power transmission gear 114 are coupled by a closed power transmission loop 120 consisting of a closed loop of chain or cogged belt.
  • the driving power transmission gear 106 and the driven power transmission gear 114 may be mounted with their teeth meshing, in which case power transmission occurs directly from the driving power transmission gear to the driven power transmission gear via the teeth.
  • the hoisting elements 108 and 109 consist of hoisting chains, and the driving gears 115 and 116 driving them are chain wheels.
  • the chains may be link chains or roller chains.
  • One end of each hoisting element 108 and 109 is passed via the driving gear 115,116 driving the hoisting element to a chain box 111 attached to the device 103.
  • the other end of the first hoisting element 108 is attached to the load 110 to be hoisted.
  • the second hoisting element 109 is first passed over two diverting pulleys 113 and 112 and then attached to the load 110.
  • the load 110 may be either a loading device or the actual disposable load.
  • the load size can also be increased by using a set of pulleys for suspending the load, e.g. by having the load 110 suspended on diverting pulleys around which the hoisting elements are passed and fixing the other ends of the hoisting elements to the device 103.
  • the device 103 can also be easily equipped so as to allow the use of more than two hoisting elements.
  • hoisting by means of three hoisting chains acting as hoisting elements can be implemented by mounting three driven chain wheels on the shaft 117 and providing the device 103 with three hoisting chains.
  • hoisting elements 108 and 109 at the fixing points of the load may undergo a larger elongation than the other.
  • the other hoisting element can as well be passed via diverting pulleys to the load 110 to be hoisted, as has been done with hoisting element 109 in Fig. 2. This procedure can be applied to render the hoisting elements interchangeable.
  • Fig. 3 presents the power transmission gears of the hoist 101 and the device 103, as well as their shafts.
  • the power ouput of the hoist 101 occurs via a shaft 107 supported by bearings 119, the driving power transmission gear 106 being fixed to the shaft.
  • the device 103 has another shaft 117 with a driven power transmission gear 114 and two more driving gears 115 and 116 fixed to it.
  • the driving power transmission gear 106 and the driven power transmission gear 114 are coupled by means of a power transmission loop 120 which may consist of a closed loop of link chain, roller chain or cogged belt, the power transmission gears 106 and 114 being implemented as corresponding types.
  • Fig. 3 shows toothed power transmission gears 106 and 114 for roller chain.
  • the shaft 117 is supported by bearings 118.
  • the figure also shows the hoisting chains 108 and 109 passed around the additional driving gears 115 and 116.
  • the hoisting elements 108 and 109 are subject to forces F3 and F4 resulting from the movement of the hoisting elements and from the load 110. These forces cannot exert a pull on the shaft of the driving power transmission gear 106 of the hoist, but instead the pull is applied to shaft 117. Therefore, no torsional strain is imposed on the shaft 107 of the driving power

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
  • Load-Engaging Elements For Cranes (AREA)
  • Carriers, Traveling Bodies, And Overhead Traveling Cranes (AREA)
EP19940119515 1993-12-17 1994-12-09 Hoisting device Expired - Lifetime EP0663369B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI935718A FI92574C (fi) 1993-12-17 1993-12-17 Nostolaite
FI935718 1993-12-17

Publications (2)

Publication Number Publication Date
EP0663369A1 EP0663369A1 (en) 1995-07-19
EP0663369B1 true EP0663369B1 (en) 2001-10-04

Family

ID=8539146

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19940119515 Expired - Lifetime EP0663369B1 (en) 1993-12-17 1994-12-09 Hoisting device

Country Status (4)

Country Link
EP (1) EP0663369B1 (fi)
JP (1) JPH07257881A (fi)
DE (1) DE69428510T2 (fi)
FI (1) FI92574C (fi)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103771283A (zh) * 2012-10-24 2014-05-07 江苏武东机械有限公司 长吊距启闭机
CN104085809B (zh) * 2014-06-30 2016-05-04 东北大学 一种自适应负载卷扬机构
CN111717821B (zh) * 2020-07-24 2021-10-22 上海宏挺紧固件制造有限公司 一种退火炉的炉盖起吊装置

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH104859A (de) * 1923-07-06 1924-08-01 Sahli Robert Flaschenzug mit elektrischem Antrieb.
US4114855A (en) * 1977-06-28 1978-09-19 The United States Of America As Represented By The Secretary Of The Army Collector for hoist chain
DE3503238A1 (de) * 1985-01-31 1986-08-14 Mannesmann AG, 4000 Düsseldorf Winde
DE3511656A1 (de) * 1985-03-29 1986-10-02 Georg 8200 Rosenheim Uttscheid Einrichtung zum gleichmaessigen heben und senken einer langgestreckten last
DE3829213A1 (de) * 1988-08-29 1990-03-01 Uhde Gmbh Hebevorrichtung zum einsatz in einer fernbedient montierbaren zelle
DE4111520A1 (de) * 1991-02-19 1992-10-29 Stahl R Foerdertech Gmbh Schwingarmer elektrokettenzug

Also Published As

Publication number Publication date
FI92574C (fi) 1994-12-12
FI92574B (fi) 1994-08-31
FI935718A0 (fi) 1993-12-17
DE69428510D1 (de) 2001-11-08
JPH07257881A (ja) 1995-10-09
EP0663369A1 (en) 1995-07-19
DE69428510T2 (de) 2002-05-08

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