EP1852386B1 - Winch for sailing boats - Google Patents

Winch for sailing boats Download PDF

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Publication number
EP1852386B1
EP1852386B1 EP06425308A EP06425308A EP1852386B1 EP 1852386 B1 EP1852386 B1 EP 1852386B1 EP 06425308 A EP06425308 A EP 06425308A EP 06425308 A EP06425308 A EP 06425308A EP 1852386 B1 EP1852386 B1 EP 1852386B1
Authority
EP
European Patent Office
Prior art keywords
winch
elements
rotor body
recess
relief
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.)
Active
Application number
EP06425308A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1852386A1 (en
Inventor
Andrea Merello
Antonio Massimo
Michele Cazzaro
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.)
Harken Italy SpA
Original Assignee
Harken Italy SpA
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 Harken Italy SpA filed Critical Harken Italy SpA
Priority to AT06425308T priority Critical patent/ATE391108T1/de
Priority to PL06425308T priority patent/PL1852386T3/pl
Priority to EP06425308A priority patent/EP1852386B1/en
Priority to DE602006000869T priority patent/DE602006000869T2/de
Priority to SI200630040T priority patent/SI1852386T1/sl
Priority to DK06425308T priority patent/DK1852386T3/da
Publication of EP1852386A1 publication Critical patent/EP1852386A1/en
Application granted granted Critical
Publication of EP1852386B1 publication Critical patent/EP1852386B1/en
Active 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
    • B66D1/60—Rope, cable, or chain winding mechanisms; Capstans adapted for special purposes
    • B66D1/74—Capstans
    • B66D1/7494—Self-tailing capstans
    • 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
    • B66D1/74—Capstans
    • B66D1/7421—Capstans having a vertical rotation axis

Definitions

  • the present invention refers to a winch for sailing boats.
  • the winch of the invention has a preferred, although not exclusive, application in the racing and/or cruising sailing boats.
  • winches are employed in sailing boats to ease the manoeuvring and adjustment operations of the sails under stress, such as for example the positioning and hoisting operations of the same.
  • Such operations are carried out by manoeuvring suitable ropes or lines (also commonly indicated with the term: sheets or halyards) suitably connected to the sails; in particular, the ropes are pulled by winding them over suitable winches, properly positioned on the boat deck.
  • the ropes are then properly clamped by suitable locking means provided onto the winch or onto the boat, in such a way to be able to keep the sails in the desired position.
  • the winches comprise a stator base or support body, adapted to be fastened on the deck of the sailing boat and a rotor body, or drum or bell, rotatably associated with the stator body and comprising a zone adapted to receive the windings of the control rope of the sail during the traction operations of the rope itself.
  • the rotor body is coaxially fitted on the stator body along a primary rotation driving shaft and it is kinematically connected to such shaft through a plurality of motion transmission and reduction gears.
  • the traction is applied to the rope by imparting a rotation to the primary shaft of the winch, for example through a handle or through suitable drive pedestals; such rotation is transferred to the rotor body, with a predefined reduction ratio, by means of the aforesaid plurality of gears, so as to obtain a predefined force multiplication ratio on the rope. More in particular, the rotation imparted to the primary shaft is transferred, by means of the aforesaid plurality of gears, to a secondary shaft in mesh engagement with a toothed crown gear internally associated with the rotor body.
  • the rope wound on the winch is pulled or loosened according to the new desired configuration of the sail.
  • the windings of the rope on the winch tend to vertically move towards the lower part of the outer lateral surface of the rotor body; on the other hand, when it is loosened, the windings of the rope on the winch tend to vertically move towards the upper part of the outer lateral surface of the rotor body, worsening the rope control by the user.
  • winches wherein the zone of the rotor body adapted to receive the windings of the rope has a frustoconical, rather than cylindrical, shape have been proposed.
  • the diameter of the lateral surface in the highest portion of the rotor body zone adapted to receive the windings of the rope is slightly greater than the diameter of the lower part of such zone. Such a diameter difference reduces the movement of the windings of the rope towards the upper part of the rotor body.
  • the zone of the rotor body adapted to receive the windings of the rope is provided with means to increase the friction with the rope.
  • the zone of the rotor body adapted to receive the windings of the rope comprises relief elements applied onto the outer lateral surface of the rotor body and arranged in vertical position, parallel to the direction of the primary shaft of the winch.
  • the presence of said relief elements allows to concentrate the friction between the windings of the rope and the rotor body of the winch in those specific points of the rope which are in contact with the same relief elements only, thus reducing the damage of the rope.
  • US 5, 947, 451 discloses a novel marine winch drum conformation comprising multiple spaced apart, shallow, V-shaped or U-shaped grooves spanning a portion of the length of the drum spool and which multiple grooves serve to not only improve the purchase of the drum spool upon the line received thereon, but cause each succeeding wrap of line contained on the spool to bear against its predecessor wrap in a functional and beneficial manner.
  • the grooves are directed generally downwardly (generally axially) from the top of the spool and each groove decreases progressively in width and depth from the top to bottom thereof.
  • the technical problem of the present invention is to provide a winch with means adapted to reduce the vertical movements of the windings of the rope along the outer surface of the rotor body, when the rope is pulled or loosened to modify the position of the sail and to ensure good friction between the rope and the rotor body of the winch, at the same time minimising the damage to the rope caused by such friction.
  • the invention therefore refers to a winch for sailing boats comprising:
  • the presence of recess elements and relief elements, properly tilted onto the outer surface of the rotor body portion adapted to receive the windings of the rope reduces the vertical movements of such windings on the rotor body during the manoeuvring operations of the sail.
  • the Applicant has indeed verified that due to their tilting the relief elements generate a thrust on the windings which opposes the vertical movement tendency of the windings themselves when the rope is pulled or loosened to modify the position of the sail in manoeuvring operations of the sailing boat.
  • the relief elements also ensure a good friction between the rope and the rotor body of the winch, at the same time minimising the damage caused by such friction to the rope.
  • the recess elements and the relief elements are arranged in such a way that each recess element is positioned between two adjacent relief elements.
  • the contact points of the windings of the rope with the sharp edges of the relief elements are distributed in a substantially systematic and regular way along the rope, thus ensuring a more uniform friction stress on the rope.
  • said second direction is tilted with respect to said first direction at an angle ⁇ having a value greater than 0° and lower than about 60°; more preferably, said predefined angle has a value equal to about 35°.
  • ⁇ having a value greater than 0° and lower than about 60°; more preferably, said predefined angle has a value equal to about 35°.
  • the portion of the rotor body adapted to receive the windings of the rope is made of metal, more preferably oxidised aluminium or chrome-plated bronze.
  • the preferred number of said relief elements can vary according to the material with which the rotor body portion, adapted to receive the windings of the ropes, is made.
  • the number of relief elements is preferably between 4 and 20 for diameters of the rotor body preferably comprised in the range between about 80 and about 150 mm.
  • the number of said elements in relief is preferably between 30 and 150 for diameters of the rotor body preferably comprised in the range between about 80 and about 150 mm.
  • the number of relief elements is equal to 8 for a diameter of the rotor body equal to about 90 mm
  • the number of relief elements is equal to 60 for a diameter of the rotor body equal to about 90 mm.
  • the preferred number of relief elements will be determined according to the surface friction for that particular material.
  • the relief elements and the recess elements of the winch according to the present invention extend along respective helical paths having a specific pitch, whose value can vary according to the size of the winch diameter and to the abovementioned ⁇ angle. Still more preferably, such relief elements and recess elements are portions of respective helices.
  • the helical progression of the relief elements allows to obtain a systematic and regular distribution of the friction stresses on the windings of the rope.
  • the portion of the rotor body of the winch adapted to receive the windings of the rope has a substantially cylindrical shape, wherein for substantially cylindrical shape it is intended a perfectly cylindrical shape, a slightly frustoconical shape, as well as a pseudo-cylindrical shape where the diameter of the lateral surface can vary slightly in several parts of said rotor body portion.
  • the diameter can be slightly greater than that one in the rest of such rotor body portion: such a shape is particularly advantageous in that it contributes to reduce the upward movements of the windings of the rope.
  • the recess elements of the winch according to the present invention can comprise a lower tapered end portion.
  • Such tapering can form a ⁇ angle in the range from about 0° and 3° with respect to the direction of the primary shaft of the winch.
  • the relief elements of the winch according to the present invention are defined by ribs obtained by making the recess elements by means of a milling process. More preferably, each relief element is obtained by making two adjacent recess elements by milling.
  • a winch is indicated with 1 according to two preferred embodiments of the present invention.
  • Such a winch 1 comprises some conventional components generally present onto any winch for sailing boats.
  • the winch 1 comprises a stator body (not shown in the figures), or support, adapted to be fixed by means of a base of it (also not shown in the figures) on the boat deck 2, and a rotor body 3, or drum or bell, rotatably associated with the stator body and adapted to receive the windings of a control rope 4 of a sail of the sailing boat during the traction operations of the rope 4 itself.
  • the portion of rotor body specifically adapted to receive the windings of the rope 4 is indicated with 5 in the attached figures.
  • the winch moreover comprises an upper portion 6 adapted to the locking of the rope 4.
  • the rotor body 3 is coaxially fitted on the stator body along a primary shaft (not shown in the figures) having an X-X symmetry axis extended along a direction x.
  • the rotor body 3 is associated with the stator body by means of the interposition of a plurality of rolling bearings (not shown in the figures) adapted to permit the related rotation of the rotor body 3 with respect to the stator body.
  • the general constituent elements of the winch 1 of the present invention are substantially similar to those of a known winch, and therefore its inner structural elements will not be described in detail below. Only the characteristic structural elements of the winch 1 of the present invention will therefore be described in detail.
  • the portion 5 of the rotor body 3 adapted to receive the windings of the rope 4 has a substantially cylindrical shape. It is possible however to foresee different shapes, such as for example not perfectly cylindrical shapes or slightly frustoconical shapes, with for example a diameter of the highest part of the portion 5 slightly greater than the diameter of the lowest part of such portion 5.
  • the portion 5 of the rotor body 3 comprises a lateral surface 7 wherein recess elements 8 and elements 9 which result in relief with respect to the recess elements 8 are defined.
  • the recess elements 8 and relief elements 9 extend along a second y direction and are arranged in such a way that each recess element 8 is between two adjacent relief elements 9.
  • the rotor body portion 5 has a diameter of about 90 mm and the second direction y is tilted at a predefined angle ⁇ with respect to the first direction x; in particular, the angle ⁇ is about 35°, but it is possible to foresee different tilt angles according to the diameter of the rotor body 3 of the winch 1.
  • the relief elements 9 and the recess elements 8 extend along respective helical paths having a fixed pitch based on the diameter of the winch and on the angle ⁇ .
  • the relief elements 9 and the recess elements 8 are portions of respective helices. It is in any case possible to foresee different pitch values depending on the size of the winch.
  • the portion 5 of the rotor body 3 of the winch 1 is made of oxidised aluminium and comprises eight recess elements 8 and the same number of relief elements 9 (in figure 1 , only the recess elements 8 and the relief elements 9 arranged on the front side of the winch are shown). It is in any case possible to foresee a different number of recess elements and relief elements depending on the size of the winch.
  • the recess elements 8 of the winch 1 shown in figure 1 moreover comprise a tapering 10 at the respective lower end portions 11.
  • Such tapering 10 forms an angle ⁇ of about 0.5° with respect to the axis X-X.
  • the portion 5 of the rotor body 3 of the winch 1 is made of chrome-plated bronze and comprises 60 recess elements 8 and the same number of relief elements 9 (also in figure 2 , only the recess elements 8 and the relief elements 9 arranged on the front side of the winch are shown). It is in any case possible, also in this case, to foresee a different number of recess elements and relief elements depending on the size of the winch.
  • the relief elements 9 are defined as ribs obtained by making the recess elements 8 through a milling process.
  • each relief element 9 is obtained by milling two adjacent recess elements 8.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Wind Motors (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Pulleys (AREA)
  • Toys (AREA)
EP06425308A 2006-05-05 2006-05-05 Winch for sailing boats Active EP1852386B1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
AT06425308T ATE391108T1 (de) 2006-05-05 2006-05-05 Winde für eines segelboot
PL06425308T PL1852386T3 (pl) 2006-05-05 2006-05-05 Kabestan do łodzi żaglowej
EP06425308A EP1852386B1 (en) 2006-05-05 2006-05-05 Winch for sailing boats
DE602006000869T DE602006000869T2 (de) 2006-05-05 2006-05-05 Winde für eines Segelboot
SI200630040T SI1852386T1 (sl) 2006-05-05 2006-05-05 Vitel za jadralna plovila
DK06425308T DK1852386T3 (da) 2006-05-05 2006-05-05 Spil til sejlbåde

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP06425308A EP1852386B1 (en) 2006-05-05 2006-05-05 Winch for sailing boats

Publications (2)

Publication Number Publication Date
EP1852386A1 EP1852386A1 (en) 2007-11-07
EP1852386B1 true EP1852386B1 (en) 2008-04-02

Family

ID=36942494

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06425308A Active EP1852386B1 (en) 2006-05-05 2006-05-05 Winch for sailing boats

Country Status (6)

Country Link
EP (1) EP1852386B1 (pl)
AT (1) ATE391108T1 (pl)
DE (1) DE602006000869T2 (pl)
DK (1) DK1852386T3 (pl)
PL (1) PL1852386T3 (pl)
SI (1) SI1852386T1 (pl)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1036523C2 (nl) * 2009-02-06 2010-08-09 Holmatro Ind Equip Lier met groeven in het manteloppervlak van de trommel.
US20130119330A1 (en) 2011-11-11 2013-05-16 Lewmar Limited Winch
DE102016120438A1 (de) * 2016-10-26 2018-04-26 Eder Maschinenbau Gmbh Spill für eine Motorwinde
CN106853951B (zh) * 2016-12-15 2019-05-17 武汉船用机械有限责任公司 一种绞盘
IT201800003407A1 (it) * 2018-03-09 2019-09-09 Harken Italy Spa Verricello di tonneggio a scomparsa
CN114275718B (zh) * 2021-12-27 2023-08-18 国网湖南省电力有限公司 一种可协助作业人员上下塔的自动升降装置及其应用方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3771766A (en) * 1972-09-28 1973-11-13 D Pillsbury Sailboat winch
NL9301178A (nl) * 1993-07-05 1995-02-01 Meissner Engineering B V Lier.
US5947451A (en) * 1997-08-20 1999-09-07 Cavanagh; Paul D. Marine winch drum
GB9818921D0 (en) * 1998-08-28 1998-10-21 Lewmar Marine Ltd Winch drum
GB0409253D0 (en) * 2004-04-26 2004-05-26 Lewmar Ltd Winch and winch drum

Also Published As

Publication number Publication date
EP1852386A1 (en) 2007-11-07
DE602006000869D1 (de) 2008-05-15
ATE391108T1 (de) 2008-04-15
DK1852386T3 (da) 2008-07-21
PL1852386T3 (pl) 2008-10-31
DE602006000869T2 (de) 2009-04-02
SI1852386T1 (sl) 2008-08-31

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