EP0675040A1 - Propulsion à ailette pour embarcations - Google Patents

Propulsion à ailette pour embarcations Download PDF

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Publication number
EP0675040A1
EP0675040A1 EP95104356A EP95104356A EP0675040A1 EP 0675040 A1 EP0675040 A1 EP 0675040A1 EP 95104356 A EP95104356 A EP 95104356A EP 95104356 A EP95104356 A EP 95104356A EP 0675040 A1 EP0675040 A1 EP 0675040A1
Authority
EP
European Patent Office
Prior art keywords
fin
carrier
watercraft
drive according
movement
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.)
Ceased
Application number
EP95104356A
Other languages
German (de)
English (en)
Inventor
Dirk Büchler
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 EP0675040A1 publication Critical patent/EP0675040A1/fr
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H1/00—Propulsive elements directly acting on water
    • B63H1/30—Propulsive elements directly acting on water of non-rotary type
    • B63H1/36—Propulsive elements directly acting on water of non-rotary type swinging sideways, e.g. fishtail type

Definitions

  • the invention relates to a fin drive for watercraft, in which the fin is pivotably articulated to a fin carrier, which is preferably mounted on the stern of the watercraft.
  • the fin drive is particularly intended for the propulsion of boats and sports vehicles, in order to provide robust drive alternatives to the propeller drive for such watercraft in sport - and to be able to provide a fitness program.
  • the fin drive can also be designed for larger power consumption, so that use on larger watercraft with motor drive is possible.
  • a universal fin drive in which the watercraft is driven by means of a horizontally or vertically moving fin in the water.
  • a tubular housing is rotatably mounted at the ends of a swiveling fork construction, in which a rotating power drive can be converted into an oscillating motion drive by a lever arm and can be transmitted to the fin mounted on the housing via a further lever.
  • the fin itself gets its shape and stability from a spring steel round bar roughly along the arc of a semicircle, over which a tear-resistant plastic film is stretched.
  • a disadvantage of this fin drive is the small oscillation range of the fin, since this is limited by the length of the fin and the respective deflection angle of the fin.
  • DE-OS 29 23 881 discloses a watercraft with a swivel fin drive, for which a propulsion fin is provided which can be swiveled sideways by means of a drive device and extends from its vertical swivel axis parallel to the longitudinal direction of the watercraft and which is characterized in that that the propulsion fin is arranged at the stern in the extension of the watercraft.
  • the pivotable jacking fin is connected to the stern of the watercraft in a watertight manner by means of a flexible material, the vertical pivoting axis of the jacking fin being arranged within the boat outline of the watercraft.
  • the core of the jacking fin consists of a plate that is almost rigid in the vicinity of the swivel axis and with increasing distance from the swivel axis becomes more flexible. Since this proposal is only intended with a fixed vertical swivel axis and therefore the fin can only be swiveled sideways around the fixed axis, this solution was also unable to provide any suggestions for the redesign of fin drives. Furthermore, with DE-OS 23 46 051 a boat drive by means of an elastic fin has become known, in which the fin is fastened with its holder to the rudder system or to the hull of the boat and can be moved by transmission tiller or rudder system without the Rudder system as such can be hindered in its effect. With this solution too, the fin is only pivoted about its articulation point, with which insufficient propulsive forces can be transmitted to the watercraft.
  • the object of the invention is to create a fin drive for watercraft with which a substantially greater thrust can be transmitted by achieving a higher degree of efficiency and which is also suitable for transmitting larger forces from drive machines.
  • the object is achieved according to the invention in that the end of the fin carrier, to which the fin is articulated, is exerted by force from the watercraft in a preferably upward and downward movement is offset and thus the fin is shifted on the one hand by the water pressure acting on the fin and on the other hand by an automatically acting tensioning mechanism into a predetermined inclined position that changes at the deflection points of the upward and downward movement, so that the vertical or almost driving force acting perpendicular to the direction of travel is deflected into a horizontally acting driving force.
  • the fin is not only pivoted about its articulation point on the fin carrier, but the articulation point of the fin on the fin carrier itself and thus the fin as a whole is pushed back and forth in the water by the movement of the fin carrier between the reversal points of the pivoting movement.
  • the fin Due to the predefined inclination of the fin, which remains constant during the swiveling process and changes mirror image only at the reversal points of the direction of movement, its propelling effect is comparable to that of a propeller blade over a turning circle section.
  • the features according to the invention would also develop their effect when the fin was pivoted in the horizontal direction, the invention is designed for pivoting the fin in the vertical direction, because a fin pivoting about a horizontal axis can also be used much more cheaply in shallow waters even in the event of draft restrictions and the steerability of the vehicle is less affected by vertical vibrations of the fin.
  • An essential feature of the invention is the changeable, wing-shaped profile shape of the fin due to its flexible design.
  • the flexible but constant profile shape changes to its opposite profile shape in such a way that the pressure side and the suction side are mutually deformed, i.e. the pressure side becomes the suction side and the suction side becomes the pressure side.
  • This shaping process of the profile shape of the fin at the reversal point of the pivoting direction is brought about, on the one hand, by the persistence of the flexible fin body and, on the other hand, by the articulation of a pull rod or pull cable connected to the trailing edge of the fin on a lever arm end fastened to the fin carrier.
  • a constant deflection angle ⁇ of the fin is set during the pivoting as a function of the pivoting speed, the pull rod or the pull cable being always arranged outside the fin cross section and only at the deflection point during the change of the swivel direction this / s is either passed through a longitudinal slot in the fin or if two tension rods / cables are arranged laterally, these are guided past the fin.
  • the fin carrier and with it also the front edge of the fin will immediately follow the power drive, while the fin body, due to its inertia, initially wants to remain at the pivot point and it will follow the new direction of movement as soon as the reshaping of the profile shape of the fin is completed by the water pressure occurring on the new pressure side and a tensile force is exerted on the tension rod. Then a pushing force can then be released from the new pressure side onto the fin carrier and thus onto the watercraft.
  • Both the length a of the lever arm and the length of the tension rod / cable determine the curvature and the deflection angle ⁇ of the fin.
  • Optimization of the feed is achieved by changing the fin's angular position relative to the lever arm axis, ie by adjusting the deflection angle ⁇ .
  • Devices on the lever arm can be used for this purpose, with which the length of the tension rods / ropes and possibly the length a of the lever arm can be adjusted.
  • the power drive preferably by human muscle power
  • the pivot bearing of the fin carrier is additionally designed to pivot laterally about a vertical axis in a limited area, so that control functions of the boat can also be carried out with the fin drive.
  • the fin carrier at the stern or in the interior of the watercraft is designed as a shaft moved up and down in the vertical direction, at the lower end of which the fin is articulated, then in this arrangement of the fin carrier its storage at the stern or inside can be twisted Design by at least up to 180 °, in each case 90 ° to port or starboard.
  • the rotatable mounting of the fin carrier is carried out in a further embodiment so that the fin carrier can be rotated by almost 360 ° in its two neck bearings.
  • a power drive acting on the upper shaft end of the fin carrier either human muscle power or a gear motor, a horizontal thrust is achieved by the respective inclined position of the fin under the deflection angle ⁇ .
  • the fin 3 On a lever arm 2 of the fin carrier 1, the fin 3 is mounted at a distance a from the end point of the lever arm 2 with its pivot axis 4 arranged on the front edge transversely to the direction of advance. From the end point of the lever arm 2 to the rear fin edge 5 a tension rod 6 or a tension cable 6 is stretched, the length of which is equal to or less than the difference between the center line of the fin 3 and the lever arm with the length a.
  • the front part and the rear part of the fin are connected to one another by spring surface sheets 7.
  • Half of a wing-shaped profile shape made of flexible material, for example rubber, is glued or otherwise connected to one another on both sides against the spring surface sheets 7.
  • fin 3 adjusts itself with its deflection angle ⁇ , depending on the direction of force of fin carrier 1, which ultimately results in the horizontal force from the vertically directed force of fin carrier 1, both downwards and upwards Component for the thrust is gained.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
EP95104356A 1994-04-02 1995-03-24 Propulsion à ailette pour embarcations Ceased EP0675040A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4411610 1994-04-02
DE19944411610 DE4411610A1 (de) 1994-04-02 1994-04-02 Flossenantrieb für Wasserfahrzeuge

Publications (1)

Publication Number Publication Date
EP0675040A1 true EP0675040A1 (fr) 1995-10-04

Family

ID=6514598

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95104356A Ceased EP0675040A1 (fr) 1994-04-02 1995-03-24 Propulsion à ailette pour embarcations

Country Status (2)

Country Link
EP (1) EP0675040A1 (fr)
DE (1) DE4411610A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103121496A (zh) * 2013-02-22 2013-05-29 哈尔滨工程大学 一种斜拉钢索船舶甲板结构

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19916411A1 (de) 1999-04-01 2000-11-16 Leif Kniese Dynamischer Hebel zur Verbesserung der Kraftübertragung
US8156995B2 (en) 2009-04-20 2012-04-17 Rite-Hite Holding Corporation Door element
US9162832B2 (en) 2013-07-02 2015-10-20 Rite-Hite Holding Corporation Vehicle-actuated weather barrier apparatus

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB588953A (en) * 1945-03-12 1947-06-06 Donald Vivian Hotchkiss Improvements relating to the propulsion of watercraft
DE2305824A1 (de) * 1973-02-07 1974-08-08 Pott Manuell betriebene antriebs- und steuervorrichtung fuer boote jeder art
DE2800678A1 (de) * 1978-01-09 1979-07-12 Otto Laser Mechanischer antrieb zur fortbewegung im wasser, insbesondere bootsantrieb

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1006751B (de) * 1951-04-13 1957-04-18 Ernst Hasche Schiffsantrieb durch Flossen
US2936729A (en) * 1954-11-18 1960-05-17 Kuttner Hugo Marine propulsion means
DE1581104A1 (de) * 1968-02-08 1970-03-05 Hertel Dr Ing Heinrich Schiffsantrieb durch Plattenpropeller
DE2346051A1 (de) * 1973-09-13 1975-03-27 Guenter Springmann Bootsantrieb mittels elastischer flosse
DE3815283A1 (de) * 1988-05-05 1989-11-16 Rinnau Hans Joachim Schlagfluegeltraegheitssteuerung
GB9120712D0 (en) * 1991-09-30 1991-11-13 Wu Cheuk C Improvements in and relating to propulsion means

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB588953A (en) * 1945-03-12 1947-06-06 Donald Vivian Hotchkiss Improvements relating to the propulsion of watercraft
DE2305824A1 (de) * 1973-02-07 1974-08-08 Pott Manuell betriebene antriebs- und steuervorrichtung fuer boote jeder art
DE2800678A1 (de) * 1978-01-09 1979-07-12 Otto Laser Mechanischer antrieb zur fortbewegung im wasser, insbesondere bootsantrieb

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103121496A (zh) * 2013-02-22 2013-05-29 哈尔滨工程大学 一种斜拉钢索船舶甲板结构
CN103121496B (zh) * 2013-02-22 2015-09-30 哈尔滨工程大学 一种斜拉钢索船舶甲板结构

Also Published As

Publication number Publication date
DE4411610A1 (de) 1995-10-05

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