EP0479624A1 - Freifall-Seilwinde - Google Patents

Freifall-Seilwinde Download PDF

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Publication number
EP0479624A1
EP0479624A1 EP91309168A EP91309168A EP0479624A1 EP 0479624 A1 EP0479624 A1 EP 0479624A1 EP 91309168 A EP91309168 A EP 91309168A EP 91309168 A EP91309168 A EP 91309168A EP 0479624 A1 EP0479624 A1 EP 0479624A1
Authority
EP
European Patent Office
Prior art keywords
cone
winch
shaft
rope
gypsy
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.)
Withdrawn
Application number
EP91309168A
Other languages
English (en)
French (fr)
Inventor
Robert John Muir
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.)
Muir Engineering Pty Ltd
Original Assignee
Muir Engineering Pty Ltd
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 Muir Engineering Pty Ltd filed Critical Muir Engineering Pty Ltd
Publication of EP0479624A1 publication Critical patent/EP0479624A1/de
Withdrawn legal-status Critical Current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
    • B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
    • B66D1/60—Rope, cable, or chain winding mechanisms; Capstans adapted for special purposes
    • B66D1/72—Anchor-chain sprockets; Anchor capstans

Definitions

  • This invention relates to a rope winch and in particular to a winch which can permit ready free falling.
  • Winches of this type are particularly suitable for use as anchor winches as, when the anchor is to be lowered, the weight of the anchor can permit free falling of the rope or chain through the winch but, when the anchor is to be raised then the winch needs to be operative to raise the rope or chain.
  • the winch of the present invention comprises a winch which can permit free-fall comprising a shaft adapted to be driven by a source of power; a first cone connected about the shaft to be driven therewith; a second cone co-axial with the first cone and moveable axially relative thereto; means whereby the second cone can be caused to assume one of two axial positions relative to the first cone, the arrangement being such that a rope or chain passing between the two cones can be driven by the winch when the second cone is in one of its two positions and can free fall when the second cone is in the other of its two positions.
  • the second cone is threaded and the portion of the shaft which extends from the first cone is also threaded and means are provided to restrict the movement of the second cone on the threaded portion relative to the first cone.
  • the winch 10 may be driven by any form of prime mover but normally by means of an electric or hydraulic motor 11, and if required the motor may be provided with a gear box 12 to provide an output of the order of speed required.
  • the winch has a housing 13 which is connected to the motor or its gear box and this may be provided with an axial aperture therethrough which aperture may be formed to receive one or more bearings 14 in which the winch main shaft 15 can rotate.
  • the main shaft is provided with means at its lower end to engage with the motor or gear box.
  • the upper end 20 of the main shaft is externally threaded 21 as will be further described later.
  • a parallel sided portion 22 having an extension 25 therebelow which extension can contain the inner face 149 of the bearing 14 and the parallel sided member having a keyway 23 formed therein.
  • a lower cone 24 is adapted to be located on the Portion 22 and is restrained against downward movement by the extension 25.
  • the lower cone 24, which may be made of bronze and can preferably be a bronze casting is adapted to fit over the Portion 22 and is provided with a keyway 26 which corresponds to the keyway 23 in the shaft.
  • a key 27 can be located in the keyways 23, 26 whereby the cone can be located on the shaft and rotate relative thereto.
  • the upward face 30 of the cone is angled outwardly and downwardly any may be provided with cutout slots 31 which extend across the body thereof which provide edges which can provide good frictional engagement with a rope 33 lying thereon.
  • These slots 31 may be radial but are preferably at an angle to the radius.
  • An upper cone 40 has a conical face 41 which may be basically complementary to the lower face 30 and has a central threaded aperture 42 which corresponds to the threaded upper portion 21 of the shaft 15 and may be threaded thereover.
  • the cone 40 may have an extended, generally cylindrical, portion 43 which is adapted to be received within a cutout portion 32 of the lower cone and the face 44 of the cone 40 and the extended portion 43 may be formed to provide a good frictional resistance with a rope.
  • This lower end 44 of the extended portion may be tapered and end with a shoulder 45 and this may be adapted to engage with the key 27 which locks the lower cone 24 to the shaft 15 but wh ich key 27 extends into the cutout portion 32 of the lower cone.
  • the threads 21, 42 on the shaft and the upper cone are of a relatively coarse pitch and the arrangement is such that as the upper cone 40 is screwed down onto the thread the shoulder 45 on the relieved portion will contact the key 27 over a substantial portion of its length thus preventing further rotation but which will be free from contact after one revolution in the opposite sense.
  • This shoulder45 and the key 27 then act as a stop to limit movement of the upper cone 40 toward the lower cone 24.
  • the arrangement is such that when this position is achieved the spacing between the two cones at the outer edge 46 thereof is slightly greater than the maximum diameter of rope 33 with which the winch is to be used and is narrower than this at the inner edge 47.
  • the arrangement is generally such that as the upper cone moves on to the lower cone the rope to be moved by the winch is pinched and a good frictional contact is achieved, but it is not crushed.
  • the winch may be designed for basically straight through operation of the rope and we may provide a peeler 50 which has an extension which enters the spacing between the cones at an angle to cause the rope to be forced outwardly when it reaches the position of the peeler.
  • the peeler may be associated with an enclosed path and may have an aperture therethrough which can effectively be a chain pipe so that the rope can be delivered to a chain locker.
  • the pawl 51 and detent 52 are such that when the drive is reversed the upper cone 40 is held against rotation and the cone moves towards the upper end 20 of the shaft and may be provided with a stop means 53 which acts against, say, an extension 54 on the top of the shaft when it has reached a position sufficiently high to permit the rope 33 to effect unrestricted free falling.
  • the movement may also act to compress a spring 55 on a brake pad 56 which acts against the top of the upper cone 40 so that there is a downward pressure on the cone.
  • the particular gypsy of this embodiment is a chain gypsy but it would be possible to use a composite chain/rope gypsy in which case the rope is received inwardly of the chain receiving portion and it would also be possible to have the gypsy split about an axis horizontal, with respect to the drawing, so that a good frictional engagement can be made with ropes of various diameters, within the operating parameters of the winch.
  • the cone 110 rests on rubber/neoprene spacers 146 which, together with the ring 105 provides a preset pressure on the drive assembly.
  • the upper portion of the shaft 103 is threaded, as described in the previous embodiment and the upper cone 130 has an internal thread 132 which can engage with the thread 103 of the shaft.
  • a pawl 140 which is pivotally mounted to the frame and which is adapted to enter a detent 141 in the upper surface of the cone 130.
  • a brake 144 which is pivotally mounted to the frame and which has a frictional engaging portion 143 and which is biased towards the second cone by means of an helical spring 145.
  • chain gypsy 120 Mounted between the cones there is a chain gypsy 120.
  • Such gypsies are known in the art and are formed to have extensions which pass between each alternate links of a chain 150 and to drive the chain by providing pressure against the link ahead of the extension.
  • the gypsy in the illustrated embodiment, is effectively complimentary, on its inner surfaces, to the formed inner surfaces of the cones and in particular has conical surfaces which are complimentary to the equivalent surfaces on the cone.
  • the diameter of the gypsy corresponds effectively to a lower portion 133 of the second cone so that under operating conditions the gypsy can rotate freely relative to the cones and will be guided by the effective relationship of the conical portion 131 of the upper cone and the corresponding conical surface 121 of the gypsy.
  • Figure 6 is the situation where a driving relationship is achieved and in this, similar to the previous embodiment there is a tapered portion 134 on the bottom of the cone which ends with a shoulder 135 which is adapted to contact the key 100 to provide positive driving interconnection between the two cones.
  • the pitch of the threads 103 and 132 are such that this engagement only occurs during one revolution of the upper cone relative to the shaft and thus acts as a stop but does not otherwise restrict rotative movement of the cone.
  • the arrangement is also such that when the cone reaches this position the gipsy 120 is basically firmly clamped between the two cones and thus will be driven therewith.
  • this is the normal driving position and is stable once it is reached.
  • the shaft 101 is caused to rotate in the direction opposite to the driving direction, the nose of the pawl 140 locks into the D tent which causes the shaft 101 to rotate relative to the cone and thus causes the cone to effectively rise up the shaft until the upper surface reacts against the stop 103. This is the position shown in Figure 7.
  • the shaft is rotated in the opposite direction and the break 143 acts to prevent the cone 130 rotating with the shaft and as such the cone tends to move down the shaft until there is again engagement between the extension 135 and the key 107.
  • the gypsy is clamped and further rotation will effect the movement of the chain or rope through the gypsy.
  • Figs 8 and 9 are, respectively, an axial section of a combined rope/chain gypsy and a section normal to the axis of the gypsy.
  • the extensions 160 which are received between each of the links of a chain, terminate before an inner portion 161, which is tapered and into which a rope can pass when the gypsy is being used with a rope.
  • the inner surfaces are formed with cut out slots 162 which act in the manner of slots 30 of the first embodiment.
  • the second cone is retained in its two extreme positions without necessity to provide any form of automatic locking or unlocking and at the same time can be driven from either of the positions to the other positions without the likelihood of locking up as the general arrangement is very simple and in each case has a relatively small surface of contact so there cannot be friction or binding.
EP91309168A 1990-10-05 1991-10-07 Freifall-Seilwinde Withdrawn EP0479624A1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
AUPK263190 1990-10-05
AU2631/90 1990-10-05
AUPK804091 1991-08-29
AU8040/91 1991-08-29

Publications (1)

Publication Number Publication Date
EP0479624A1 true EP0479624A1 (de) 1992-04-08

Family

ID=25643951

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91309168A Withdrawn EP0479624A1 (de) 1990-10-05 1991-10-07 Freifall-Seilwinde

Country Status (2)

Country Link
EP (1) EP0479624A1 (de)
NZ (1) NZ240141A (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1235736A1 (de) * 1999-11-15 2002-09-04 Muir Engineering Pty. Limited Freefallwinden
WO2008133518A1 (en) * 2007-04-27 2008-11-06 Wubbo Ockels B.V. Winch and assembly of such a winch with a storage drum and/or an endless rope

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR358386A (fr) * 1905-10-10 1906-02-12 Alfred Moreaux Manivelle de sureté pour crics et autres appareils de levage permettant la descente libre ou au frein
US1868792A (en) * 1928-09-20 1932-07-26 Whiting Corp Mechanical load brake
US2290735A (en) * 1939-03-20 1942-07-21 Brauer Walter Automatic cathead
FR1140959A (fr) * 1955-02-04 1957-08-22 Dispositif perfectionné de levage et de traction
US3055638A (en) * 1959-01-22 1962-09-25 Fred C Good & Sons Inc Windlass
CH398007A (de) * 1962-08-18 1965-08-31 Nortag Aktiengesellschaft Ankerspill
US3288438A (en) * 1963-11-30 1966-11-29 Baas Erwin Vertical capstan
US3961771A (en) * 1975-06-18 1976-06-08 The United States Of America As Represented By The Secretary Of The Army Mechanical guy cable control device
US4111397A (en) * 1975-12-19 1978-09-05 Costruzioni Barbarossa Three-speed winch particularly for nautical use
DE3507724A1 (de) * 1985-03-05 1986-09-25 Heinrich de Fries GmbH, 4000 Düsseldorf Lastdruckbremse

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR358386A (fr) * 1905-10-10 1906-02-12 Alfred Moreaux Manivelle de sureté pour crics et autres appareils de levage permettant la descente libre ou au frein
US1868792A (en) * 1928-09-20 1932-07-26 Whiting Corp Mechanical load brake
US2290735A (en) * 1939-03-20 1942-07-21 Brauer Walter Automatic cathead
FR1140959A (fr) * 1955-02-04 1957-08-22 Dispositif perfectionné de levage et de traction
US3055638A (en) * 1959-01-22 1962-09-25 Fred C Good & Sons Inc Windlass
CH398007A (de) * 1962-08-18 1965-08-31 Nortag Aktiengesellschaft Ankerspill
US3288438A (en) * 1963-11-30 1966-11-29 Baas Erwin Vertical capstan
US3961771A (en) * 1975-06-18 1976-06-08 The United States Of America As Represented By The Secretary Of The Army Mechanical guy cable control device
US4111397A (en) * 1975-12-19 1978-09-05 Costruzioni Barbarossa Three-speed winch particularly for nautical use
DE3507724A1 (de) * 1985-03-05 1986-09-25 Heinrich de Fries GmbH, 4000 Düsseldorf Lastdruckbremse

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1235736A1 (de) * 1999-11-15 2002-09-04 Muir Engineering Pty. Limited Freefallwinden
EP1235736A4 (de) * 1999-11-15 2006-11-29 Muir Eng Pty Ltd Freefallwinden
WO2008133518A1 (en) * 2007-04-27 2008-11-06 Wubbo Ockels B.V. Winch and assembly of such a winch with a storage drum and/or an endless rope

Also Published As

Publication number Publication date
NZ240141A (en) 1993-03-26

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