EP0875448A2 - Bremsvorrichtung, insbesondere zum Bremsen der Abwärtsbewegung eines Rettungsbootes - Google Patents

Bremsvorrichtung, insbesondere zum Bremsen der Abwärtsbewegung eines Rettungsbootes Download PDF

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Publication number
EP0875448A2
EP0875448A2 EP98107306A EP98107306A EP0875448A2 EP 0875448 A2 EP0875448 A2 EP 0875448A2 EP 98107306 A EP98107306 A EP 98107306A EP 98107306 A EP98107306 A EP 98107306A EP 0875448 A2 EP0875448 A2 EP 0875448A2
Authority
EP
European Patent Office
Prior art keywords
braking
discs
disc
rotating member
static
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Withdrawn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
EP98107306A
Other languages
English (en)
French (fr)
Other versions
EP0875448A3 (de
Inventor
Angelo Gambini
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0875448A2 publication Critical patent/EP0875448A2/de
Publication of EP0875448A3 publication Critical patent/EP0875448A3/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Withdrawn legal-status Critical Current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
    • B66D5/00—Braking or detent devices characterised by application to lifting or hoisting gear, e.g. for controlling the lowering of loads
    • B66D5/02—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes
    • B66D5/04—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes actuated by centrifugal force
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B23/00—Equipment for handling lifeboats or the like
    • B63B23/40—Use of lowering or hoisting gear
    • B63B23/42—Use of lowering or hoisting gear with braking equipment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D5/00—Braking or detent devices characterised by application to lifting or hoisting gear, e.g. for controlling the lowering of loads
    • B66D5/02—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes
    • B66D5/12—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes with axial effect
    • B66D5/14—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes with axial effect embodying discs

Definitions

  • This invention relates to a braking device, in particular for braking the descent of a life-boat lowered from a ship.
  • a further drawback of known braking devices is related to the fact that they have always to be activated and regulated by an operator who, for example, during the descent of a life-boat has to regulate the braking action of the device on the basis of the life-boat descent speed, and which in a panic and/or danger situation can be difficult and uncomfortable.
  • centrifugal disc clutches are known (see for example patent EP0443149 filed by the present applicant) comprising means for transmitting movement from a drive shaft to a driven shaft via a mass consisting of a loose material, possibly in fluid or powder form, which by the centrifugal effect urges a friction disc connected to the drive shaft and a friction disc connected to the driven shaft into contact with each other.
  • An object of this invention is to provide a braking device which ensures perfect efficiency even after repeated periods of operation, for example after repeated tests involving life-boat lowering into the sea, and which requires neither frequent maintenance nor frequent replacement of its components.
  • a further object is to provide a braking device the effect of which can also be regulated automatically, proportionally to the speed attained by the braking member, without the intervention of an operator.
  • a braking device comprises a hub 1, rigidly secured to a wall 20 and carrying one or more (three in the example shown in Figure 1) braking discs 2, and an element 3 rotating about the hub and connected thereto by usual bearings 4.
  • the hub 1 comprises a toothing 8 which enables the discs to partially slide axially.
  • the rotating element 3 comprises a first member 5 with a part 6, shown in the example in the form of a pinion for connection to a rotating member (not shown) to be braked, and a toothing 7 with which three usual braking discs 9 are engaged in an axially slidable manner.
  • Both the discs 2 and the discs 9 are of usual type and advantageously comprise an outer sintered layer.
  • the rotating element 3 also comprises a second member 10 of discoidal shape, rotatably connected to the first via a toothing 7 which also enables it to slide axially, so as to be able to move the discs 9 and 2 into mutual contact.
  • the rotating element 3 also comprises a third annular member 11 which together with a portion of the member 10 defines a chamber 12 partly filled with loose material 23, such as metal balls.
  • the device also comprises, secured to a wall 21, reaction means 13 arranged to exert on the discoidal member 10 a force such as to urge said member against the discs 9 and these latter against the discs 2, so as to maintain the pinion braked.
  • the reaction means 13 comprise a piston 14 movable within a cylinder 16 housing conventional springs 15 arranged to exert an axial thrust on the discoidal member 10, such as to maintain the piston 6 braked.
  • the cylinder 16 is connected via a conduit 17 to a conventional hydraulic or pneumatic system (not shown) arranged to feed into the cylinder a pressurized fluid able to exert on the piston a force counteracting that of the springs 15.
  • both the member 5 and the discoidal member 10 comprise apertures 18, 19 for the circulation of oil within the rotating element 3.
  • the device could also comprise a reservoir for the oil and a conventional system for forced oil circulation.
  • the device is housed in the lower part of a closed box casing (partly shown) comprising the side walls 20, 21 and the base wall 22, and which upperly houses a portion of the rotary shaft of the member to be braked, this being engaged with the pinion 6 via a chain or a series of gearwheels (partly shown in the lower part of Figure 2).
  • a closed box casing comprising the side walls 20, 21 and the base wall 22, and which upperly houses a portion of the rotary shaft of the member to be braked, this being engaged with the pinion 6 via a chain or a series of gearwheels (partly shown in the lower part of Figure 2).
  • the mass of the material 23 can be chosen such as to obtain the desired descent speed of the load.
  • Figure 2 shows a modification of the embodiment heretofore described (those parts in common with Figure 1 being indicated by the same reference numeral and not being further described).
  • the modification of Figure 2 differs from the aforedescribed embodiment only in the reaction means which maintain the pinion 6 braked and the means for counteracting the action of said reaction means.
  • the reaction means indicated overall by 24, comprise a piston or pin 30, coaxial to the hub 1 and arranged to slide axially within the hub which hence acts as a cylinder.
  • the hub 1 is connected (as in the case of the cylinder 16 of Figure 1) to a conventional hydraulic or pneumatic system (not shown) via a conduit 17.
  • the counteracting means comprise a shaft 29 rigid with the pin 30 and able to rotate coaxially to the pin 30 and to the hub 1.
  • One end of the shaft 29 is connected to the pin 30 via a metal ball 31, a connecting element 32 and a spring 33.
  • the ball 31 is partly housed in two hemispherical seats provided in the end of the shaft 29 and of the connecting element 32.
  • the other end of the shaft is rigidly connected to a lever 34 which can be moved angularly only through a short distance as its rotation is locked by limit screws 35. To counteract the action of the spring 25, it is sufficient to rotate the lever 34 through a short distance. This also moves the ball 31, which urges the element 32 towards the spring 25 and consequently, overcoming the action of the spring 25, moves the pin 30 such that its head 26 separates from the bush 27. Consequently there no longer acts on the discoidal member 10 a force able to maintain the braking discs 2, 9 in mutual contact.
  • the lever 34 can also be operated from the inside of the life-boat to be lowered, for which purpose it is necessary merely to fix a cord to the lever and pull the cord or release it during the descent of the life-boat.
  • reaction means and counteracting means could be of different type from those described, or the braking discs could be positioned differently from that shown in Figures 1 and 2, for example such that the member 10 comes into contact with a disc connected to the hub 1, rather than with a disc connected to the rotating element.
  • the device could moreover be provided with a plurality of springs (not shown in the drawings) acting on the outer edge of disc member 10 in such a way that the effect of the loose mass 23 on said member 10 starts only when said mass exerts a thrust greater than that exerted by said springs.
  • disc member 10 and the annular member 11 should be prolonged toward the outside.
  • the plurality of springs (for example three) could be arranged symmetrically between the opposite walls of the disc member 10 and the first member 5 without interfering with the discs 9 and 2. This modification is very useful in many cases when it is needed that the brakes start acting only when a certain velocity is reached.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Ocean & Marine Engineering (AREA)
  • Braking Arrangements (AREA)
EP98107306A 1997-04-30 1998-04-22 Bremsvorrichtung, insbesondere zum Bremsen der Abwärtsbewegung eines Rettungsbootes Withdrawn EP0875448A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI971009 1997-04-30
IT97MI001009A IT1291716B1 (it) 1997-04-30 1997-04-30 Dispositivo di frenatura in particolare per frenare la discesa di una scialuppa di salvataggio

Publications (2)

Publication Number Publication Date
EP0875448A2 true EP0875448A2 (de) 1998-11-04
EP0875448A3 EP0875448A3 (de) 1999-12-22

Family

ID=11377041

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98107306A Withdrawn EP0875448A3 (de) 1997-04-30 1998-04-22 Bremsvorrichtung, insbesondere zum Bremsen der Abwärtsbewegung eines Rettungsbootes

Country Status (2)

Country Link
EP (1) EP0875448A3 (de)
IT (1) IT1291716B1 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005049474A1 (en) * 2003-11-24 2005-06-02 Tonci Zanetic Davit winch with oil brake
WO2010092127A1 (en) 2009-02-13 2010-08-19 Nadiro A/S A launching system
CN101327898B (zh) * 2007-06-18 2011-04-20 毕鉴华 刹卷筒安全装置
KR102662414B1 (ko) * 2023-10-12 2024-04-30 주식회사 제이피케이이노 윈치 브레이크 구조체
KR102662416B1 (ko) * 2023-10-12 2024-04-30 주식회사 제이피케이이노 성능 개선 윈치 브레이크 시스템

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0443149A1 (de) * 1990-02-23 1991-08-28 Angelo Gambini Fliehkraft-Scheibenkupplung
EP0734995A1 (de) * 1995-03-30 1996-10-02 Nihon Biso Co., Ltd. Kabelzugvorrichtung

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0443149A1 (de) * 1990-02-23 1991-08-28 Angelo Gambini Fliehkraft-Scheibenkupplung
EP0734995A1 (de) * 1995-03-30 1996-10-02 Nihon Biso Co., Ltd. Kabelzugvorrichtung

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005049474A1 (en) * 2003-11-24 2005-06-02 Tonci Zanetic Davit winch with oil brake
CN101327898B (zh) * 2007-06-18 2011-04-20 毕鉴华 刹卷筒安全装置
WO2010092127A1 (en) 2009-02-13 2010-08-19 Nadiro A/S A launching system
KR102662414B1 (ko) * 2023-10-12 2024-04-30 주식회사 제이피케이이노 윈치 브레이크 구조체
KR102662416B1 (ko) * 2023-10-12 2024-04-30 주식회사 제이피케이이노 성능 개선 윈치 브레이크 시스템

Also Published As

Publication number Publication date
EP0875448A3 (de) 1999-12-22
IT1291716B1 (it) 1999-01-21
ITMI971009A0 (de) 1997-04-30
ITMI971009A1 (it) 1998-10-30

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