WO2007149073A1 - Lève-bateau - Google Patents

Lève-bateau Download PDF

Info

Publication number
WO2007149073A1
WO2007149073A1 PCT/US2006/023720 US2006023720W WO2007149073A1 WO 2007149073 A1 WO2007149073 A1 WO 2007149073A1 US 2006023720 W US2006023720 W US 2006023720W WO 2007149073 A1 WO2007149073 A1 WO 2007149073A1
Authority
WO
WIPO (PCT)
Prior art keywords
pulley
cradle
piston
assembly
cable
Prior art date
Application number
PCT/US2006/023720
Other languages
English (en)
Inventor
Robert L. Way
Original Assignee
Way Robert L
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 Way Robert L filed Critical Way Robert L
Priority to PCT/US2006/023720 priority Critical patent/WO2007149073A1/fr
Publication of WO2007149073A1 publication Critical patent/WO2007149073A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63C—LAUNCHING, HAULING-OUT, OR DRY-DOCKING OF VESSELS; LIFE-SAVING IN WATER; EQUIPMENT FOR DWELLING OR WORKING UNDER WATER; MEANS FOR SALVAGING OR SEARCHING FOR UNDERWATER OBJECTS
    • B63C3/00—Launching or hauling-out by landborne slipways; Slipways
    • B63C3/06—Launching or hauling-out by landborne slipways; Slipways by vertical movement of vessel, i.e. by crane
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63C—LAUNCHING, HAULING-OUT, OR DRY-DOCKING OF VESSELS; LIFE-SAVING IN WATER; EQUIPMENT FOR DWELLING OR WORKING UNDER WATER; MEANS FOR SALVAGING OR SEARCHING FOR UNDERWATER OBJECTS
    • B63C5/00—Equipment usable both on slipways and in dry docks
    • B63C5/02—Stagings; Scaffolding; Shores or struts
    • B63C5/04—Bilge or keel blocks

Definitions

  • This invention relates to a boat lift and, more particularly, to a hydraulically operated boat lift including a plurality of pulleys for raising and lowering a boat along two pilings.
  • a multiplicity of boat lifts have been employed by prior art for docking vessels or lifting them out of the water for servicing.
  • One type of such boat lifts is hydraulically operated by a plurality of pulleys and cables.
  • conventional hydraulic boat lifts employing such pulleys and cables typically require unsightly overhead steel construction and are free standing, i.e., not secured to a dock, as illustrated in FlG. 1 of published U.S. Patent Application No. 2002/0150427 and U.S. Patent No. Re. 32,118 both to Godbersen, for example. Also see U.S. Patent No. 7,066,683.
  • an assembly for lifting a boat including a cradle for carrying a boat, a plurality of spaced vertically disposed pilings on each side of the cradle, each piling having a lower portion mounted into a floor of a body of water and an upper portion extending thereabove; a pair of support housings affixed to upper portions of the plurality of pilings on each side of the cradle.
  • a pair of lifting means are housed in and mounted on the support housing and connected to the cradle for moving the cradle vertically, each lifting means including a horizontally extensible piston carrying a piston pulley block at its forward end, a stationary hydraulic cylinder mounted to the housing, and cable means having one end portion threaded around the pulley block and another end portion connected to the cradle.
  • Transition pulley means are supported by the housing and carry a portion of the cable means to direct another end portion of the cable means vertically for moving the cradle when the piston pulley block is moved horizontally by the piston, and hydraulic control means for operating each hydraulic cylinder.
  • the cradle includes three spaced structural members having opposite end portions and extending laterally of the cylinder and piston, the cable means includes three cables, each cable having a first end attached to an end portion of the member and another end portion threaded around the piston pulley block and affixed to the housing.
  • One member is disposed adjacent and below a stern of a boat carried by the cradle, a second member is disposed adjacent and below amidships of a boat carried by the cradle, and a third member is disposed adjacent and below of a boat carried by the cradle.
  • Each transition pulley means includes a down bow pulley, a down amidships pulley, and a down stern pulley, each down pulley being disposed vertically to dispose an axis of rotation of each down pulley horizontally.
  • Each housing includes a lower wall, each lower wall of the housing has spaced slots, each down pulley being mounted with its axis horizontal and extending partially through the slot with its axis in the housing.
  • Each piston pulley block includes three piston pulleys, each piston pulley being mounted horizontally to dispose an axis of rotation of the piston pulley vertically.
  • motion-sensing means for determining the distance of rotation of one down pulley of each lifting means and providing an output signal indicative of such measured distance of rotation.
  • the control circuit means receives the output signals for operating the hydraulic control means in response to the difference between the control signals.
  • an assembly for lifting means and providing an output signal indicative of such measured distance of rotation receives the output signals for operating the hydraulic control means in response to the difference between the control signals.
  • an assembly for lifting a boat comprising a cradle for carrying a boat, three vertically disposed pilings on each side of the cradle and the pair of support housings are each affixed to the upper portion of each respective piling.
  • Each cable is threaded around the pulley block and connected to the cradle to provide that the cradle end of each cable moves vertically twice the distance of the movement of the pulley block by said piston.
  • each cable having one end portion affixed to the cradle and another end portion affixed to the pulley block, each cable being threaded around the pulleys of the pulley block and a redirect pulley to provide that the cradle moves three times the distance of movement of the pulley block by the hydraulic means.
  • each redirect pulleys are mounted in a fixed position on each housing, each cable having one end portion affixed with respect to the housing and another end portion affixed to the pulley block, three cradle pulleys mounted on each side of the cradle, each cable being threaded around the pulleys of the pulley block and a respective redirect pulley and respective cradle pulley to provide that the cradle moves one and one half times the distance of movement of the pulley block by the hydraulic means.
  • an assembly for lifting a boat comprising a cradle for carrying a boat, a plurality of spaced vertically disposed pilings on each side of the cradle, each piling having upper and lower end portions with the upper end portions being located above water at a predetermined height, a pair of elongated support housings being affixed to respective the upper portion of the plurality of the pilings on each side of the cradle, a pair of hydraulic lifting means disposed in respective housing for moving the cradle upwardly and downwardly, each hydraulic lifting means including a cylinder affixed to the housing and a movable piston, a plurality of pulleys and a plurality of cables, the cylinder and piston moving in a substantially horizontal direction, the cradle including a deck part substantially horizontally aligned with a dock, and the housings having an upper wall substantially parallel to and parallel with the deck part of said cradle.
  • FIG. 1 is a perspective view of the boat lift according to the present invention
  • FIG. 2 is a perspective view of the various components of the boat lift of FIG. 1 with sides and covers not shown;
  • FIG. 3 is a motion diagram of the configuration of a first cable in accord with the present invention.
  • FIG. 4 is a motion diagram of the configuration of a second cable in accord with the present invention.
  • FIG. 5 is a motion diagram of the configuration of a third cable in accord with the present invention.
  • FIG. 6 is a top diagrammatic view of the cable connections and pulleys of FIGS. 3-5;
  • FIG. 7 is a perspective view of the mounting of the aft end of the starboard CHU
  • FIG. 8 is a perspective view of the amidships portion of the starboard CHU
  • FlG. 9 is a perspective view of the forward down transition pulley of the starboard CHU
  • FIG. 10 is a motion diagram of the configuration of a first cable in accord with another embodiment of the invention.
  • FIG. 11 is a motion diagram of the configuration of a second cable in accord with the embodiment of FIG. 10;
  • FIG. 12 is a motion diagram of the configuration of a third cable in accord with the embodiment of FIGS. 10 and 11.
  • FIG. 13 is a top diagrammatic view of the cable connections and pulleys of FIGS. 10-12;
  • FIG. 14 is a detail of one embodiment of cable termination in accord with the present invention.
  • FIG. 15 is a detail of an alternate cable termination in accord with the present invention.
  • FIG. 16 is a perspective view of the pulley motion sensing apparatus in accord with the present invention
  • FIG. 17 is a block diagram of the feedback system that receives information from the apparatus of FIG. 16;
  • FIG. 18 illustrates an alternate routing of the cables in accord with the present invention
  • FIG. 19 is pictorial end view illustrating the relationship between the cable- handling units, boat platform and pilings in accord with the present invention.
  • FIG. 20 is a detail of FIG. 19.
  • the boat lift 10 design (FIG. 1) is based on a hydraulically operated Cable- Handling-Unit or "CHU” that "shortens” the lifting cables as opposed to “winding the cable on a rotating drum or pipe.
  • CHU Cable- Handling-Unit
  • This feature is what a lift 10 is dependent on. Because the possibility of crashing, or "two-blocking" the moving apparatus against the non-moving machinery is impossible, the typical safety margin of 16 to 18 inches between these two elements can be reduced to less than 1 inch.
  • the lift 10 is comprised of a starboard and port CHU 15, 14 (FIG. 2, items 1 and 2).
  • a moving deck or cradle structure of members 20 disposed athwartships below a boat, hydraulic power supplies 21 and 22 and six support pilings.
  • two or three cables are used on each CHU. To facilitate explanation, only the starboard CHU as configured for the "double pass" three-cable platform lift will be discussed.
  • Cable routing for the CHU is shown in FIGS. 3-9. There are eight pulleys and three cables employed. Cable 24, the Stern Lift Cable (FIG. 3) uses two pulleys: one 180 degree wrap pulley 27 in the cylinder rod-end pulley block assembly and one 90 degree wrap "down transition" pulley 29, part of the main pulley block assembly.
  • Cable 32 the Amidships Lift Cable (FIG. 4) utilizes three pulleys: One 180 degree wrap pulley 35 in the cylinder rod pulley block assembly, one 180 degree wrap pulley 37, part of the main pulley block assembly and one 90 degree wrap "down transition" pulley 38.
  • Cable 41 the Forward Lift Cable (FIG. 5), utilizes three pulleys: One 180 degree wrap pulley 46 in the cylinder rod-end pulley block assembly 42, 43, one 180 degree wrap pulley 44 in the main pulley block assembly, and one 90 degree wrap "down transition" pulley 47.
  • All cable stationary or "bitter-ends" are attached to the CHU cable anchor block 55 at points 28, 36, 45.
  • a single cylinder rod-end pulley 53, 54 is used to move platform 13 up and down.
  • the total platform travel is equal to 2X cylinder rod travel.
  • a 6 1 cylinder rod stroke yields 12' of platform travel.
  • a triple pass, 11-pulley CHU is shown in FIGS. 10-13. The primary difference is adding another set of redirect pulleys and moving the cable anchor from its stationary position, to the modified rod-end pulley block assembly.
  • the triple pass, 11-pulley configuration provides an advantage of 3:1 (cable gathered: cylinder length).
  • FIGS. 10-12 illustrate the triple pass configuration.
  • first cable 60 is wound around pulleys 63, 59 and redirect pulley 62 and is operated by cylinder/piston 57, 58.
  • the rod end pulley 59 is carried by anchor point 61
  • Lift portion of cable 60 terminates in attachment bracket.
  • Second cable 68 is wound around pulleys 70, 71, 72 and redirect pulley 73 is anchored at 69.
  • Cylinder 66 operates rod 67 to control cable lift portion 74 terminating in attachment bracket 75.
  • the third cable 78 is wound around pulleys 80, 81 and redirect pulleys 84, 85 and is anchored at 79.
  • Cylinder/piston 76, 77 operates lift portion 82 of cable 78 having attached bracket 83.
  • cable anchor 88 is the point of attachment (61, 69, 79) and is moved by a single cylinder/piston 86, 87 and pulley block 89 which carries pulleys 59, 70, 80.
  • Fixed pulley block 90 carries pulleys 62, 73, 85 and fixed pulley block carries pulleys 72, 73.
  • Pulley 63 is mounted via block 92.
  • the primary disadvantage to this configuration is the increased load exerted on the main pulley block assembly 88 and the hydraulic cylinder 86, 87.
  • the cylinder On the double pass configuration, the cylinder must lift 2X.5 total load.
  • the triple pass configuration the cylinder must lift 3X.5 total load.
  • the triple pass configuration cylinder load calculation can be expressed: 3X.25 total load. Therefore, it becomes advantageous to utilize the triple pass configuration only when also utilizing the additional pulley cradle 94 installed on the platform cross-member (FIG. 15) via clamp 95 and post 93 which now becomes a 1.5:1 advantage.
  • FIG. 18 illustrates an alternate routing of the cables otherwise shown in FIG. 13.
  • Cylinder 105 operates piston rod 106 to which rod end pulley block 107 is attached and which is narrower than the block 89 of FIG. 13.
  • Pulley stack 108 is carried by block 107 and also includes cable anchor point 109.
  • Redirect pulley blocks 110 and 111 are substantially the same as blocks 90, 91 of FIG. 13.
  • Pulleys 108 are preferably approximately 50% larger than the pulleys 62, 73, 85 and 72, 84 carried by blocks 91 and 90 respectively to allow for proper cable clearance with the narrower pulley block 107.
  • the width of the CHU's 14A and 15A in this embodiment of the invention is less than CHU's 14, 15 discussed hereinabove.
  • FIGS. 19 and 20 illustrate the platform 13 including upper surface deck 112 with members 113 and associated connectors as understood in the art. Area 114 is shown enlarged in FIG. 20. Vertical motion upwardly and downwardly is indicated at arrow 115. All construction materials and methods are chosen to be appropriate in the marine environment in which the lift is to be built and operated.
  • the hydraulic lift automatic leveling system consists of four main parts:
  • Target Wheel a ferrous metal sprocket 96 with 120 teeth or groves around the 5.5" diameter periphery. The wheel is coupled to the side of the FORWARD WIRE down transition sheave via conventional bolts or other appropriate means (One each is mounted within the port/starboard CHU).
  • Proximity Sensor "hall effect” 97
  • a device is mounted by bracket 99 (FIG. 16) used to read or “count” the “high spots” or teeth on the ferrous metal target wheel. As the rope sheave/target wheel rotates, 120 “couples pulses” are generated every complete revolution. This yields one pulse per .125" (1/8 th ”) of rope travel.
  • Programmable Relay An electronic device (micro controller PLC 100) is known to the art and is used to count pulses generated from each Cable Handling Unit (port/starboard target wheel 96). An uneven count (disparity) greater than five pulses between port and starboard target wheel represents an "out of tolerance” condition that is rectified in the form of "interruption" of CHU's drive solenoid. Simply, the side (port or starboard) that "leads” is forced to stop briefly to "null” the error signal.
  • Port and starboard directional valves 104 are the final component of the feedback subsystem. Whether traveling up or down, when an "out of tolerance” condition is detected, the directional valve 104 for the leading cylinder is forced by the PLC 100 to "center" (bypass fluid) for predetermined short intervals of a duration sufficient to "null” (reduce to zero), pulse disparity.
  • the "closed loop” feedback subsystem continuously monitors, compares and when necessary, corrects out of tolerance conditions instantaneously.
  • a means is provided to level the lift "manually” utilizing a pushbutton on the electronics cabinet. Note: An optical encoder can be used in place of the target wheel and proximity sensor.
  • the target wheel 96, proximity sensor 97 and directional valve 102 are contained within the respective CHU assembly. (Port/starboard)
  • the PLC device 100 is contained within the electronic cabinet mounted on the dock structure.
  • platform deck 112 is preferably flush with the surface of CHU's 14 and 15 and with the surface of dock 16.
  • Pilings 23, units 14 and 15, cradle members 20 and the ultimate vertical movement of the apparatus are all of predetermined height and dimension for the location and intended use including the length and weight of the boat 11 to be lifted.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Types And Forms Of Lifts (AREA)

Abstract

L'invention concerne un ensemble de levage (10) de bateau qui comprend un berceau (20) pour porter un bateau (11) monté entre trois piles (23) de chaque côté du berceau (20). Une paire de capsules supports sont fixées aux piles (23) de chaque côté du berceau. Une paire d'élévateurs hydrauliques (14, 15) sont logés dans les capsules et reliés au berceau pour déplacer verticalement celui-ci. Chaque élévateur (10) comprend un piston (26) extensible horizontalement portant un moufle (50, 51, 52) de piston et un vérin hydraulique (25) fixe. Trois câbles (24, 32, 41) ont une partie terminale enfilée entre les poulies (27, 35, 37, 44, 46) du moufle (50, 51, 52) et le berceau (20). Des poulies de transition (29, 38, 47) sont portées par la capsule et renvoient le câble verticalement pour déplacer le berceau (20) quand le moufle (50, 51, 52) se déplace. On peut employer des poulies et divers points d'ancrage supplémentaires pour obtenir des élévations verticales d'une fois et demie, deux fois et trois fois la distance de mouvement du piston. Les capsules sont dans le même plan que le plancher de berceau (20) et/ou le quai (16).
PCT/US2006/023720 2006-06-20 2006-06-20 Lève-bateau WO2007149073A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/US2006/023720 WO2007149073A1 (fr) 2006-06-20 2006-06-20 Lève-bateau

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US2006/023720 WO2007149073A1 (fr) 2006-06-20 2006-06-20 Lève-bateau

Publications (1)

Publication Number Publication Date
WO2007149073A1 true WO2007149073A1 (fr) 2007-12-27

Family

ID=38833703

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2006/023720 WO2007149073A1 (fr) 2006-06-20 2006-06-20 Lève-bateau

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3504502A (en) * 1967-11-06 1970-04-07 Luther H Blount Lift dock for a water borne vessel
US4959808A (en) * 1987-04-18 1990-09-25 Siemens Aktiengesellschaft Method and apparatus for the distance control of a positioning drive
US20050058508A1 (en) * 2003-09-11 2005-03-17 Way Robert L. Boat lift

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3504502A (en) * 1967-11-06 1970-04-07 Luther H Blount Lift dock for a water borne vessel
US4959808A (en) * 1987-04-18 1990-09-25 Siemens Aktiengesellschaft Method and apparatus for the distance control of a positioning drive
US20050058508A1 (en) * 2003-09-11 2005-03-17 Way Robert L. Boat lift

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