EP2757037A1 - Klappbares Element für ein ausfahrbares Strahlantrieb und Verfahren zur Herstellung eines derartigen Elements - Google Patents

Klappbares Element für ein ausfahrbares Strahlantrieb und Verfahren zur Herstellung eines derartigen Elements Download PDF

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Publication number
EP2757037A1
EP2757037A1 EP20130000312 EP13000312A EP2757037A1 EP 2757037 A1 EP2757037 A1 EP 2757037A1 EP 20130000312 EP20130000312 EP 20130000312 EP 13000312 A EP13000312 A EP 13000312A EP 2757037 A1 EP2757037 A1 EP 2757037A1
Authority
EP
European Patent Office
Prior art keywords
thruster
tunnel segment
arm section
thruster tunnel
propeller
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Withdrawn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
EP20130000312
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English (en)
French (fr)
Inventor
Tore Eriksen
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.)
Sleipner Motor AS
Original Assignee
Sleipner Motor AS
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 Sleipner Motor AS filed Critical Sleipner Motor AS
Priority to EP20130000312 priority Critical patent/EP2757037A1/de
Publication of EP2757037A1 publication Critical patent/EP2757037A1/de
Withdrawn legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H25/00—Steering; Slowing-down otherwise than by use of propulsive elements; Dynamic anchoring, i.e. positioning vessels by means of main or auxiliary propulsive elements
    • B63H25/42—Steering or dynamic anchoring by propulsive elements; Steering or dynamic anchoring by propellers used therefor only; Steering or dynamic anchoring by rudders carrying propellers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H25/00—Steering; Slowing-down otherwise than by use of propulsive elements; Dynamic anchoring, i.e. positioning vessels by means of main or auxiliary propulsive elements
    • B63H25/42—Steering or dynamic anchoring by propulsive elements; Steering or dynamic anchoring by propellers used therefor only; Steering or dynamic anchoring by rudders carrying propellers
    • B63H2025/425—Propulsive elements, other than jets, substantially used for steering or dynamic anchoring only, with means for retracting, or otherwise moving to a rest position outside the water flow around the hull

Definitions

  • European patent application EP 1 876 094 A2 shows a retractable thruster for a vessels where the propeller unit and the electric motor are moved between a recessed position and an operational position.
  • the propeller unit and the electric motor are comprised in a piston element that can be moved inside a housing by applying hydraulic pressure on the piston.
  • US patent 5152240 (Fontanille ) describes a retractable and storable thruster for a vessel, using a trapezoidal deformable rotatable device producing rectilinear movement inside a well in the vessel's hull.
  • US patent application US 2006/0060127 shows a retractable thruster comprising a propulsion assembly comprising a rigid structure secured to a propeller housing and containing a motor driving the propeller inside the propeller housing via at least one rotary shaft between the motor and the propeller.
  • Displacement means enable the propulsion assembly to be moved between retracted and deployed positions by the propulsion assembly performing uniform circular movement about an axis of rotation situated substantially at the level of the hull or beneath the hull.
  • European patent application EP2 246 252 A2 shows a thruster that can be tilted into a thruster housing in the hull of a boat.
  • the thruster and the thruster motor driving the propeller are both tiltably connected to a swing frame and will rotate around an axis of the swing frame when moving from an extracted position to a retracted position and vice versa.
  • the moving part is a critical element for the behavior of the thruster. Without a proper mechanism for retracting the propeller housing, the thruster cannot work properly, and dangerous situations may occur if the thruster does not return to its retracted position inside the hull.
  • An object of the present invention is to disclose a foldable element of a retractable thruster that is smaller in size than comparable foldable elements according to prior art, since the available space in the hull of a watercraft is generally limited. Due to the problems related to the wear and tear of cables and components as the motor is moved during the retraction, it is also an object of the invention that the motor shall be fixed mounted relative the hull of the boat.
  • Another object of the present invention is to disclose a method for manufacturing the foldable part of a retractable thruster that provides a foldable element for a retractable thruster that can be made with more precision than the propeller housings of thrusters according to background art.
  • the invention is in an embodiment a method for manufacturing a foldable element of a retractable thruster for a boat, wherein said method comprises the following steps;
  • the invention is also a A foldable element of a retractable thruster for a boat, comprising
  • first element (100a) and said second element (100b) are identical.
  • the elements are identical they may be moulded in the same form and there is need for only one set of tools for performing the operation.
  • Fig. 1 it is shown a foldable element (100) of a retractable thruster for a boat according to the invention.
  • the foldable element comprises a first element (100a) comprising a first thruster tunnel segment (20a) shaped as a hollow cylinder segment, and at least one first arm section (41a) extending from said first thruster tunnel segment (20a).
  • the foldable element (100) further comprises a second element (100b) comprising a second thruster tunnel segment (20b) shaped as a hollow cylinder segment, and at least one second arm section (41b) extending from said second thruster tunnel segment (20b).
  • the second element (100b) is arranged relative said first element (100a) so that said first thruster tunnel segment (20a) and said second thruster tunnel segment (20b) constitutes a hollow cylinder (17), and wherein said first arm section (41a) is in contact with, and fastened to said respective second arm section (41b).
  • the foldable element further comprising a propeller shaft (21) with one or more propellers (22), a drive shaft (15) perpendicular to said propeller shaft (21) and a gearbox (16) connecting said drive shaft (15) to said propeller shaft (21) arranged inside said hollow cylinder (17), wherein said drive shaft (15) is extending through an opening (12) in the wall of said a hollow cylinder (17).
  • the invention is also a method for producing a foldable element as described above.
  • the method comprises the following steps;
  • the first and second elements may be moulded with injection moulding or any suitable moulding technique.
  • the foldable element according to the invention may be used in a retractable thruster as described in Fig. 2 , 3 , 4 , 5 and 6 , but it may also be used in any other retractable thruster with a foldable element.
  • the retractable thruster (1) for a watercraft with a hull (2) comprises an opening (3), wherein the retractable thruster (1) comprises;
  • the watercraft where the retractable thruster (1) is installed or is to be installed has an opening in the hull (2) where the retractable thruster (1) can be mounted as seen in Fig. 3 .
  • the thruster comprises in an embodiment of the invention a housing (70) that is mounted into the hull (2).
  • the housing (70) allows simpler and easier adaption to different hull (2) shapes.
  • the motor (10) is fixed relative the hull (2), preferably to the housing (70) that itself is arranged for being fixed to the hull (2).
  • the motor may be e.g. electric or hydraulic and connected by electrical cables or hydraulic tubes.
  • the fixed motor (10) simplifies wiring and reduces the wear and tear of cables and tubes.
  • simple bushings can be used in the wall of the housing (70) between the motor (10) and the cabling in the hull (2).
  • the propeller unit (20) is arranged for moving between the retracted position (A) inside the hull (1) and the extended position (B) outside the hull (1) as shown in Fig. 4 along an arc (AB).
  • the arc (AB) is a part of a circumference of a circle with centre (O) inside the hull (2).
  • the centre (O) is close to the bottom of the hull (2).
  • the door (30) may be arranged for rotating with a second direction of rotation (s) opposite of the first direction of rotation (r).
  • the propeller unit (2) starts extending from the retracted position (A) in an embodiment of the invention by moving along the arc (AB) in the direction of rotation (r).
  • the door (30) will move with the propeller unit (2) as described above, and in addition the door (30) will rotate with a second direction of rotation (s) that is opposite the first direction of rotation (r) until the propeller unit (2) reaches its extended position (B).
  • Fig. 4 it is illustrated the position that a door (30') would have had in the extended position (B) if it had not rotated with the second direction of rotation (s). This would clearly not be a good solution.
  • the extent of the rotation of the door (30) in the second direction of rotation (s) depends on the design of the retractable thruster (1).
  • the door (30) should in the extended position constitute a shield for the propeller unit (20) in the forward direction of the boat.
  • the top of the door is close to the hull (2) of the boat and the bottom of the door is inclined backwards with respect to the longitudinal direction of the boat.
  • the door (30) may in this embodiment protect the propeller unit (20) against underwater obstacles, such as underwater rocks, that may be located just below the hull and therefore are hard to discover. This is especially important when retractable thrusters are used during docking in shallow water.
  • the propeller unit (20) comprises a propeller shaft (21) with one or more propellers (22) and wherein the motor (10) is arranged for driving the propeller shaft (21).
  • the propeller shaft (21) is arranged perpendicular to the longitudinal direction of the boat, and the one or more propellers (22) on the propeller shaft (21) will then arranged in the transverse direction of the boat and provide a lateral thrust.
  • the force and direction of the lateral thrust will depend on the shape of the propellers (22) and the speed and direction of the rotation of the propeller shaft (21).
  • the motor (10) is an electric motor, and the direction of the lateral thrust can be changed by changing the polarity of the DC voltage of the motor (10).
  • the propeller shaft (21) is arranged for being aligned with the longitudinal direction of the boat.
  • the retractable thruster may then also be used as an alternative or backup propulsion device.
  • the door (30) is arranged for rotating about the propeller shaft (21) with the second direction of rotation (s).
  • other centres of rotation for the door may also be used to achieve the same functionality.
  • the door (30) is fixed to the propeller unit (20). Accordingly the door and propeller unit will in this embodiment rotate with the same rotational speed around the same centre of rotation, which may be the rotational axis of the propeller shaft (21).
  • the retractable thruster (1) comprises a drive shaft (15) between a motor shaft (11) of the motor (10) and the propeller shaft (21).
  • the drive shaft (15) is arranged for the transfer of rotational motion from the motor shaft (15) to the propeller shaft (21) when the motor (10) is running.
  • the drive shaft (15) may be connected to the propeller shaft (21) by a gear, such as a bevel gear, a worm gear or any other suitable gear.
  • the motor shaft (11) may also be connected to the propeller shaft (21) by e.g. sprockets and chains, hydraulic transmission, etc.
  • the drive shaft (15) is a foldable double cardan joint drive shaft as illustrated in Fig. 6 comprising;
  • the drive shaft (15) when the drive shaft (15) is folded into the collapsed position, it is able fold in three dimensions due to the flexibility of the first universal joint (150), and therefore the drive shaft (15) can be folded independently of the rotational position of the driving shaft (140) and the second pivot axis (b).
  • the intermediate shaft (180) is a fixed length shaft.
  • a spring loaded telescopic shaft may in an embodiment also be used.
  • the offset axis (g) will coincide with the rotational and longitudinal axis of the intermediate shaft (180) when the retractable thruster in the extended position (A). In other positions, the offset axis (g) will wobble if the drive shaft is rotated, but since no energy needs to be transferred to the propeller axis (21) from the motor shaft (11) in these positions, only rotational movement related to the rotational alignment of the propeller axis (21) with the motor shaft (11) needs to be considered when the retractable thruster (1) is not in the extended position (A)
  • the drive shaft (15) is mainly rectilinear in its longitudinal direction and coincident with a rotational axis (11a) of the motor shaft (11) when the propeller unit (20) is in the extended position (B). This ensures that the drive shaft (15) has no bends and that energy is transferred optimally.
  • the arc (AB) is a circular arc and the propeller unit (20) is arranged for moving between the retracted position (A) and the extended position (B), along the arc (AB) where a central angle ( ⁇ ) of the arc (AB) is at least 90 degree, as shown in Fig. 4 .
  • the retractable thruster (1) may comprise a seal (190) around the driven shaft (170) for tightening against the propeller unit.
  • the seal (190) may be flexible in the longitudinal direction of the driven shaft (170), and expanded in the length direction by a spring that pushes one end of the seal (190) towards the propeller unit (20) and the other end towards a fixed point of the driven shaft (170), such as a flange, to take up small length variations in the drive shaft (15) between the retracted position (A) and the expanded position (B).
  • the retractable thruster (1) comprises at least one first arm (40) comprising a first revolute joint (41) in a first end of the first arm (40) and a second revolute joint (42) in a second end of the first arm (40), where the first revolute joint (41) is rotatably connected in the origo (O) of a sector defined by the arc (AB), and the second revolute joint (42) is rotatably connected to the propeller unit (20) at a rotary point (ab) along the arc (AB).
  • the first revolute joint (41) is centred in the centre of rotation of a point along the arc AB, and the second revolute joint (42) is fixed to the propeller unit (20) at a point that should follow the arc (AB).
  • the propeller unit (20) can now move between the retracted position (A) and the extended position (B). Stoppers may be used to restrict the end positions of the movement of the first arm (40).
  • the rotary point (ab) may in an embodiment of the invention coincide with a rotational axis of the propeller shaft (21).
  • the door rotates in the opposite direction of the movement of the propeller unit around the centre (O).
  • the retractable thruster comprises at least one track rod (50), as illustrated in Fig. 6 , being rotatably connected to a first track rod point (51) fixed relative the motor (10) in a first end of the track rod (50) and rotatably connected to a second track rod point (52) fixed relative the propeller unit (20) in a second end of the track rod (50).

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Power-Operated Mechanisms For Wings (AREA)
EP20130000312 2013-01-22 2013-01-22 Klappbares Element für ein ausfahrbares Strahlantrieb und Verfahren zur Herstellung eines derartigen Elements Withdrawn EP2757037A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20130000312 EP2757037A1 (de) 2013-01-22 2013-01-22 Klappbares Element für ein ausfahrbares Strahlantrieb und Verfahren zur Herstellung eines derartigen Elements

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20130000312 EP2757037A1 (de) 2013-01-22 2013-01-22 Klappbares Element für ein ausfahrbares Strahlantrieb und Verfahren zur Herstellung eines derartigen Elements

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EP2757037A1 true EP2757037A1 (de) 2014-07-23

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Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016145537A1 (en) * 2015-03-18 2016-09-22 Sideshift Inc. Improved mounting and actuation device
EP3168137A1 (de) * 2015-11-12 2017-05-17 Lewmar Limited Ausfahrbares strahlruder
CN108357642A (zh) * 2018-04-12 2018-08-03 华南智能机器人创新研究院 一种光动能无人船
US10766586B2 (en) 2018-06-22 2020-09-08 Lewmar Limited Retractable thruster and drive shaft for retractable thruster
WO2022050850A3 (en) * 2021-03-23 2022-06-09 Sleipner Motor As Retractable thruster
DE102022101872A1 (de) 2021-02-25 2022-08-25 Brunswick Corporation Schiffantriebsvorrichtung und Verfahren zur Herstellung einer Schiffantriebsvorrichtung mit Aufprallschutz
DE102022115286A1 (de) 2021-07-15 2023-01-19 Brunswick Corporation Vorrichtungen und verfahren zur herstellung von vorrichtungen zur halterung eines propulsors auf einem wasserfahrzeug
US11572146B2 (en) 2021-02-25 2023-02-07 Brunswick Corporation Stowable marine propulsion systems
US11591057B2 (en) 2021-02-25 2023-02-28 Brunswick Corporation Propulsion devices and methods of making propulsion devices that align propeller blades for marine vessels
USD983838S1 (en) 2021-06-14 2023-04-18 Brunswick Corporation Cowling for an outboard motor
US11801926B2 (en) 2021-02-25 2023-10-31 Brunswick Corporation Devices and methods for making devices for supporting a propulsor on a marine vessel
US11851150B2 (en) 2021-02-25 2023-12-26 Brunswick Corporation Propulsion devices with lock devices and methods of making propulsion devices with lock devices for marine vessels
US11873071B2 (en) 2021-02-25 2024-01-16 Brunswick Corporation Stowable propulsion devices for marine vessels and methods for making stowable propulsion devices for marine vessels
US11939036B2 (en) 2021-07-15 2024-03-26 Brunswick Corporation Devices and methods for coupling propulsion devices to marine vessels
USD1023888S1 (en) 2022-01-14 2024-04-23 Brunswick Corporation Cowling on a deployable thruster for a marine vessel

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5152240A (en) 1989-09-29 1992-10-06 Guy Fontanille Retractable or storable thruster using a trapezodidal deformably rotatable device producing rectilinear movement inside a well
US20060060127A1 (en) 2003-04-09 2006-03-23 Max Power Rotationally retractable propeller
EP1876094A2 (de) 2006-07-06 2008-01-09 Neta N.V. Abschwenkbares Strahlruder für Schiffe
EP2246252A2 (de) 2009-04-30 2010-11-03 Howaldtswerke-Deutsche Werft GmbH Unterseeboot

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5152240A (en) 1989-09-29 1992-10-06 Guy Fontanille Retractable or storable thruster using a trapezodidal deformably rotatable device producing rectilinear movement inside a well
US20060060127A1 (en) 2003-04-09 2006-03-23 Max Power Rotationally retractable propeller
EP1876094A2 (de) 2006-07-06 2008-01-09 Neta N.V. Abschwenkbares Strahlruder für Schiffe
EP2246252A2 (de) 2009-04-30 2010-11-03 Howaldtswerke-Deutsche Werft GmbH Unterseeboot

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016145537A1 (en) * 2015-03-18 2016-09-22 Sideshift Inc. Improved mounting and actuation device
US10167069B2 (en) 2015-03-18 2019-01-01 Sideshift Inc. Mounting and actuation device
EP3168137A1 (de) * 2015-11-12 2017-05-17 Lewmar Limited Ausfahrbares strahlruder
GB2544467A (en) * 2015-11-12 2017-05-24 Lewmar Ltd Retractable thruster
US10005532B2 (en) 2015-11-12 2018-06-26 Lewmar Limited Retractable thruster
AU2016256801B2 (en) * 2015-11-12 2021-01-21 Lewmar Limited Retractable thruster
CN108357642A (zh) * 2018-04-12 2018-08-03 华南智能机器人创新研究院 一种光动能无人船
CN108357642B (zh) * 2018-04-12 2019-06-21 华南智能机器人创新研究院 一种光动能无人船
US10766586B2 (en) 2018-06-22 2020-09-08 Lewmar Limited Retractable thruster and drive shaft for retractable thruster
US11572146B2 (en) 2021-02-25 2023-02-07 Brunswick Corporation Stowable marine propulsion systems
US11801926B2 (en) 2021-02-25 2023-10-31 Brunswick Corporation Devices and methods for making devices for supporting a propulsor on a marine vessel
US11932369B1 (en) 2021-02-25 2024-03-19 Brunswick Corporation Devices and methods of making devices for coupling propulsors to marine vessels
US11873071B2 (en) 2021-02-25 2024-01-16 Brunswick Corporation Stowable propulsion devices for marine vessels and methods for making stowable propulsion devices for marine vessels
US11591057B2 (en) 2021-02-25 2023-02-28 Brunswick Corporation Propulsion devices and methods of making propulsion devices that align propeller blades for marine vessels
US11603179B2 (en) 2021-02-25 2023-03-14 Brunswick Corporation Marine propulsion device and methods of making marine propulsion device having impact protection
US11866144B2 (en) 2021-02-25 2024-01-09 Brunswick Corporation Propulsion devices and methods of making propulsion devices that align propeller blades for marine vessels
DE102022101872A1 (de) 2021-02-25 2022-08-25 Brunswick Corporation Schiffantriebsvorrichtung und Verfahren zur Herstellung einer Schiffantriebsvorrichtung mit Aufprallschutz
US11851150B2 (en) 2021-02-25 2023-12-26 Brunswick Corporation Propulsion devices with lock devices and methods of making propulsion devices with lock devices for marine vessels
WO2022050850A3 (en) * 2021-03-23 2022-06-09 Sleipner Motor As Retractable thruster
USD1006828S1 (en) 2021-06-14 2023-12-05 Brunswick Corporation Cowling for an outboard motor
USD983838S1 (en) 2021-06-14 2023-04-18 Brunswick Corporation Cowling for an outboard motor
DE102022115286A1 (de) 2021-07-15 2023-01-19 Brunswick Corporation Vorrichtungen und verfahren zur herstellung von vorrichtungen zur halterung eines propulsors auf einem wasserfahrzeug
US11939036B2 (en) 2021-07-15 2024-03-26 Brunswick Corporation Devices and methods for coupling propulsion devices to marine vessels
USD1023888S1 (en) 2022-01-14 2024-04-23 Brunswick Corporation Cowling on a deployable thruster for a marine vessel

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