Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
  • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
  • B63B32/00—Water sports boards; Accessories therefor
  • B63B32/10—Motor-propelled water sports boards
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
  • B63H—MARINE PROPULSION OR STEERING
  • B63H21/00—Use of propulsion power plant or units on vessels
  • B63H21/12—Use of propulsion power plant or units on vessels the vessels being motor-driven
  • B63H21/17—Use of propulsion power plant or units on vessels the vessels being motor-driven by electric motor
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
  • B63H—MARINE PROPULSION OR STEERING
  • B63H11/00—Marine propulsion by water jets
  • B63H11/02—Marine propulsion by water jets the propulsive medium being ambient water
  • B63H11/04—Marine propulsion by water jets the propulsive medium being ambient water by means of pumps
  • B63H11/08—Marine propulsion by water jets the propulsive medium being ambient water by means of pumps of rotary type
  • B63H2011/081—Marine propulsion by water jets the propulsive medium being ambient water by means of pumps of rotary type with axial flow, i.e. the axis of rotation being parallel to the flow direction

Definitions

• the invention relates to a surfboard with a hull, with an underwater surface and a water inlet opening in the underwater surface and with a jet propulsion system with a water channel from the water inlet opening to a water outlet opening arranged in a rear end side.
• the surfboard according to the invention has an electric drive.
• DE 1 428 874 A1 discloses a surfboard powered by an internal combustion engine.
• a nozzle is installed over the water for the drive is sucked.
• DE 10 2015 103 503 A1 discloses an inflatable surfboard with a drive component.
• the drive component is fastened with fastening means between two arms of the fuselage.
• Surfboards with electric drive are known for example from DE 20 201 1 051 071.
• Powered surfboards are not dependent on high waves, but they can also be used in windless and low-surf waters.
• the electric drive of the known surfboard is powered by an arranged in the surfboard accumulator with power.
• a jet pipe between the water inlet and water outlet is designed as an aluminum component.
• the underwater surface and the rear end face are usually plastic components.
• the known jet propulsion has the disadvantage that it is relatively expensive to manufacture and the material, and on the other hand, the water inlet of the jet propulsion system is designed to be unfavorably fluidic.
• the underwater surface of the fuselage in the region of the water inlet opening is designed as a nozzle projecting into the fuselage, which is connected to the nozzle Underwater surface is integrally formed and to which a jet pipe is connected with one end, the other end is connected to the water outlet.
• the jet pipe is not placed directly on the water inlet opening with its one end, but to the water inlet opening is followed by a nozzle which is integrally formed with the underwater surface of the hull in the region of the water inlet opening and projects into the fuselage.
• the nozzle is preferably formed of the same material as the underwater surface. The material cost of this material are advantageously lower than that of the jet pipe.
• the connecting piece can proceed in one piece from the underwater surface into the fuselage as an injection-molded component or laminate component.
• the nozzle has a connection opening, this may preferably be flat. It can have an approximately elliptical, oval or circular connection cross-section. At the connection opening one end of the jet pipe is connected. The other end of the jet pipe is connected to the water outlet opening, which may be formed as a nozzle.
• connection opening can touch the bottom plate. It preferably forms no bulge between the neck and inner wall of the bottom plate. At least the bottom plate and the nozzle can therefore be made in one piece with an injection molding tool as a component.
• the water inlet opening may be made significantly more elongated in the direction of the bow than in the prior art without incurring additional material costs for a longer jet pipe component.
• their longitudinal extent may be four, five or even six times the maximum width of the water inlet opening in the underwater surface.
• the transition from the underwater surface into the nozzle can have a significantly lower angle, ie, be flatter than in the prior art.
• the nozzle is formed in a cost effective manner as a plastic component.
• the relatively expensive jet pipe is formed of aluminum, and in that the nozzle can have a circular or elliptical connection opening, the jet pipe can be easily cut as a bent pipe, the two ends at a certain angle are, be trained. An additional deformation of a Jetrohrendes is no longer required.
• the jet drive is preferably designed as an electric drive, which is supplied with power via a battery.
• the battery can be replaceable.
• the electric drive preferably drives a shaft with an impeller of the jet drive.
• the jet drive comprises a bottom plate and an end face, which are connected to each other in a fixed position, and the neck is integrally connected to the bottom plate and stands on the inside of the hull from the bottom plate.
• the nozzle may be formed as a passage in an inside elevation.
• the survey may be prismatic with an obtuse triangle as a lateral cross-sectional area.
• the plastic part of the jet propulsion extensive and in such a way that a bottom plate is provided, from which the nozzle of the invention protrudes hull inside, and in addition to a rear edge of the bottom plate, an end face is integrally connected to the bottom plate over preferably lateral stabilization walls is connected to the bottom plate and the front side at the edges thereof.
• the nozzle stands in particular as a prismatic survey.
• the open box can be made in one piece. This production is particularly inexpensive.
• the plastic part of the jet propulsion can of course also be made in unit with the hull of the surfboard, or with a propulsion unit that forms part of the surfboard.
• the jet tube is preferably formed as an aluminum tube, which is adapted in its length and curvature so that it fits between the water outlet and the connection opening of the nozzle.
• There is a watertight connection for example in the form of a plug connection, screw or by means of knee lever mechanisms o. ⁇ . intended.
• the jet tube has an additional lateral, bow-side opening, through which the drive train is guided for a rotor.
• the rotor is driven by an electric motor and a drive train.
• a rotor can be an impeller or a propeller or similar. act.
• a shaft of the drive may be passed through a jet tube wall and the impeller may be disposed in the jet tube.
• Show 1 is a perspective view, partly as a review of a surfboard with inventive jet propulsion
• Fig. 3 the jet propulsion system according to the invention in a disassembled state with jet pipe and
• a surfboard 1 shows a surfboard 1 according to the invention.
• a surfboard 1 is here to understand a device on which the surfer stands, sits or kneels, and which floats on a water and which advantageously has a buoyancy sufficient to carry the surfer. At least the buoyancy should be sufficient, together with the feed, which gives a jet propulsion 4 to the surfboard 1, so that the surfboard 1 floats above the water.
• the surfboard 1 has no sail. In German usage, one would classify the sport rather than surfing.
• the surfboard 1 has a bow 2 and a tail 3.
• a jet propulsion 4 is housed in the rear 3.
• the jet drive 4 is shown here only schematically.
• the jet drive 4 comprises a water inlet opening 6 in an underwater surface of the surfboard 1 and a jet pipe 7 with a water outlet opening 8 arranged on an end side 21 of the stern 3.
• the water outlet opening 8 can be formed as a nozzle, which can be arranged pivotable about a vertical to a tread surface 9 Rotary axis is rotatable.
• an unillustrated rotor is arranged, which sucks water into the jet pipe 7 and squirts out of the nozzle and the surfer with the surfboard 1 thereby gives a propulsion.
• a hull 1 1 of the surfboard 1 is further arranged a (not shown) motor for the rotor, which drives the rotor via a (not shown) drive train, and a (not shown) control for the motor, with the power of the Motors can be controlled. It can thus be controlled in particular the speed of the surfboard 1.
• Both the motor and the controller are powered by a rechargeable battery (not shown).
• the surfboard 1 is formed here with the solid hull 1 1.
• the hull 1 for example, a foam-containing core, which is completely surrounded on the outside with laminate layers.
• a recess 12 is provided, in which the jet drive 4 is inserted positively.
• the jet drive 4 here comprises a bottom plate 20 and a front side 21 and a nozzle 22 which projects from the bottom plate 20 inside, and the jet pipe 7, which connects the nozzle 22 with the water outlet 8.
• the nozzle 22 forms a transition between the water inlet opening 6 at the underwater surface and one end of the jet pipe 7. Another end of the jet pipe 7 is connected to the water outlet 8.
• Fig. 2 shows the jet propulsion 4 without rotor, motor and accumulator in a perspective view. From the jet drive 4, only the base plate 20, the end face 21, the water inlet opening 6 and the jet tube 7 with water outlet opening 8 are shown in FIG.
• the water inlet opening is placed in a plane with the bottom plate 20, or in the bottom plate 20, wherein the bottom plate 20 forms a part of the underwater surface of the surfboard 1.
• the main part of the underwater surface 5 is formed by a laminate outer surface of the hull 1 1.
• the bottom plate 20 of the jet propulsion system 4 forms a unit with the underwater surface 5 or at least one positive-locking unit.
• the bottom plate 20 is pulled up in the form of a nozzle in the region of the water inlet opening 6.
• the bottom plate 20 and the nozzle 22 are integrally formed integrally. They can be a single injection-molded component.
• the end face 21 is provided, which is arranged on the rear edge of the bottom plate 20, and lateral stabilization walls 23, which are each formed here, for example, triangular.
• the two stabilizing walls 23, the end face 21 and the bottom plate 20 with connecting piece 22 are formed as a one-piece injection-molded part or laminate component.
• the one-piece design of the nozzle 22 with the bottom plate 20 it is possible to design the transition between an underwater surface 5 and the jet pipe 7 through the water inlet opening 6 aerodynamically particularly favorable.
• the bow-side end of the water inlet opening 6 can be attracted particularly far to the bow 2, so that not only an almost circular or substantially oval or elliptical water inlet cross-section is formed, but the water inlet opening 6 is greatly expanded to the bow 2 of the surfboard 1 out.
• the maximum length of the water inlet opening 6 may for example be three to four or five times greater than the maximum width of the water inlet opening 6.
• the nozzle 22 has an inside connection opening 27, which is for example circular or elliptical and at which the one end of the jet pipe 7 is arranged.
• a bottom portion 24 of a terminal opening edge preferably contacts the bottom plate 20, or is preferably a few millimeters, preferably more than 2, 3, 4 mm or more than 1 cm apart therefrom.
• a bottom-side portion 26 of the port opening edge is between the water inlet port 6 and a Level formed which projects from the bottom-side portion 24 of the terminal opening edge perpendicular to the bottom plate 20 in the fuselage interior.
• the bottom-side portion 26 of the opening edge is spaced from the water inlet opening 6, preferably at least 5 mm, preferably at least 1 cm, 2cm, 3cm apart.
• the downside portion 26 may also be disposed between the plane and another plane that projects perpendicularly from the opposite edge of the water inlet 6 into the interior of the fuselage.
• the opposite edge of the water inlet opening 6 is opposite the bottom-side portion.
• the bottom plate 20 and the nozzle 22 and the other plastic components can also be designed as 3D printing or CNC machined components.
• the jet pipe 7 is attached.
• the jet pipe 7 may for example be clamped, screwed or inserted or glued into a circumferential groove.
• Another end of the jet tube 7 is connected to the water outlet 8 of the end face 21 as well by a screw or clamp connection or otherwise preferably releasably connected.
• the jet pipe 7 is a complete aluminum component, while the bottom plate 20, the lateral stabilizing walls 23 and the end face 21 and the nozzle 22 are a laminate component or injection-molded component, ie plastic component, or fiber-reinforced plastic component.
• the nozzle 22 is shown in FIGS. 1, 2 and 3 as a longitudinal section triangular elevation, in which a piece of a water channel is introduced formed.

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• Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Combustion & Propulsion (AREA)
• Mechanical Engineering (AREA)
• Ocean & Marine Engineering (AREA)
• Hydraulic Turbines (AREA)
• Toys (AREA)
• Endoscopes (AREA)

Priority Applications (3)

Applications Claiming Priority (2)

Publications (1)

Family

ID=64949284

Family Applications (1)

Country Status (5)

Cited By (5)

Citations (7)

Family Cites Families (1)

• 2017
  • 2017-12-21 DE DE102017130963.2A patent/DE102017130963A1/de not_active Withdrawn
• 2018
  • 2018-12-20 EP EP18829845.9A patent/EP3526112B1/de active Active
  • 2018-12-20 ES ES18829845T patent/ES2910260T3/es active Active
  • 2018-12-20 HR HRP20220443TT patent/HRP20220443T1/hr unknown
  • 2018-12-20 WO PCT/EP2018/086275 patent/WO2019122176A1/de unknown

Patent Citations (7)

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