EP3046834A1 - Surfboard mit antrieb - Google Patents
Surfboard mit antriebInfo
- Publication number
- EP3046834A1 EP3046834A1 EP14765938.7A EP14765938A EP3046834A1 EP 3046834 A1 EP3046834 A1 EP 3046834A1 EP 14765938 A EP14765938 A EP 14765938A EP 3046834 A1 EP3046834 A1 EP 3046834A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- propeller
- surfboard
- recess
- drive
- vessel according
- 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.)
- Granted
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 33
- 230000007423 decrease Effects 0.000 claims description 13
- 230000007704 transition Effects 0.000 claims description 10
- 238000011161 development Methods 0.000 description 8
- 230000018109 developmental process Effects 0.000 description 8
- 230000008901 benefit Effects 0.000 description 6
- 230000005484 gravity Effects 0.000 description 5
- JTJMJGYZQZDUJJ-UHFFFAOYSA-N phencyclidine Chemical compound C1CCCCN1C1(C=2C=CC=CC=2)CCCCC1 JTJMJGYZQZDUJJ-UHFFFAOYSA-N 0.000 description 5
- 230000003068 static effect Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000002828 fuel tank Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000009849 deactivation Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 210000000707 wrist Anatomy 0.000 description 1
Classifications
-
- 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
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B32/00—Water sports boards; Accessories therefor
- B63B32/10—Motor-propelled water sports boards
Definitions
- the invention relates to a watercraft, in particular a water sports device, which has a surfboard whose upper side is provided for receiving a person and has a drive on the underside of the surfboard.
- the surfboard With the drive, which has a propeller, the surfboard can drive on the surface of a body of water.
- a surfboard is known, in which a drive in the form of, for example, a jet engine is integrated.
- DE 44 04 241 AI shows a surfboard with a motor drive.
- the drive includes an internal combustion engine connected to a propeller attached to the underside of the surfboard.
- Windsurfing and surfing is highly dependent on the presence of wind or waves, with only the wind or waves serving as the drive for the surfboard. By applying the invention this dependence is eliminated while surfing, the surfboard can also be used under weather conditions that are unsuitable for conventional surfboards.
- the surfboard shown in DE 44 04 241 AI has an internal combustion engine, which is supplied with fuel via an integrated fuel tank.
- the arranged on the underside of the surfboard propeller is connected via a flywheel clutch and a drive to the engine.
- the entire drive unit is attached to a base plate and has the components from the engine, including the fuel tank, to the propeller.
- the entire drive unit can be used as a module in the surfboard and also removed.
- the surfboard may be converted from a configuration for sailing operation in which a sail is attached to the surfboard and the propulsion module is removed from the surfboard to a configuration for so-called motor surfing in which the sail is removed and the propulsion unit is in place provided cavity of the surfboard is used.
- the space provided for the drive unit cavity extends continuously from the top to the bottom of the surfboard.
- the components, such as the engine, the flywheel clutch, the tank, and the toothed belt drive serving as the drive are relatively heavy compared to the surfboard. Due to the arrangement of the components of the drive in a drive unit, the position of the drive unit significantly influences the position of the center of gravity of the surfboard. The location of the center of gravity significantly affects the ride quality of the surfboard.
- the arrangement of the propeller directly below the drive module increases the depth of the surfboard. Further, the distance of the line of action of the driving force of the propeller would be increased with respect to the surfboard, whereby the moment which is exerted on the surfboard by the driving force, would be large, whereby the front end of the surfboard would lift out of the water.
- the present invention is based on the object to provide a watercraft, in particular a water sports device, which has improved handling characteristics.
- the watercraft according to the invention comprises a preferably flat designed float, which is designed as a surfboard.
- a surfboard also referred to as a surfboard, is a board made of a floating material that can also be used as a sports equipment for surfing or windsurfing.
- Known surfboards are for the most part of a float, which may be made of hard foam, for example, on the top of a person, that is, a surfer can take place, which can be arranged on the top foot straps, and on the underside, especially in the tail, one or more swords, such as two or three fins for directional stability can be arranged.
- the surfboard or the float usually have an elongated shape, wherein the longitudinal axis of the board substantially corresponds to the direction of travel.
- the range of the board is small compared to its length.
- the thickness of the board is related to the length and the width of the board Boards low, which results in a board-like or surfboard board-like shape.
- the surfboard or its float has a positive static buoyancy which in particular is so great that it keeps the surfer with the surfboard and the drive described below above water.
- the top of the surfboard is intended to accommodate a person, it is not excluded that the surfboard may be used alternatively or in combination with a person to carry loads, as might be the case, for example, in military applications.
- the watercraft further includes a drive disposed on the underside of the surfboard, the drive having a propeller.
- the drive comprises a propeller shaft which is rotatable about a propeller shaft axis of rotation and to which the propeller, which may also be referred to as a screw or water screw, can be fastened or fastened.
- the propeller has at least one, preferably a plurality of, of the propeller rotation axis, which corresponds to the propeller shaft rotation axis, projecting wings, wherein the propeller or the wings are designed so that upon rotation of the propeller or the propeller shaft to the propeller shaft rotation axis sucked water from the propeller front side and on the propeller back is ejected with a pulse, whereby a propulsion along the propeller shaft axis of rotation is generated.
- the propeller shaft axis of rotation is parallel to the longitudinal axis of the surfboard, whereby propulsion is generated along, in particular parallel to the longitudinal axis of the surfboard.
- the propeller shaft may be configured so that the blades of the propeller protrude radially from the propeller shaft.
- the propeller shaft may be a hollow shaft so that the blades of the propeller protrude radially inwardly with respect to the propeller shaft.
- the propeller shaft rotation axis corresponds in particular to the central axis in the propeller shaft.
- the propeller is specially adapted for operation in water.
- the drive may, for example, have an electric motor, wherein its motor shaft rotational axis and the propeller shaft rotational axis are aligned with one another.
- the motor shaft rotation axis and the propeller shaft rotation axis are on a common axis.
- the electric motor can be arranged in front of the propeller, that is to say on the intake side or the propeller front side.
- the engine may be located between the front end of the surfboard and the propeller.
- the motor housing which the Motor shaft axis of rotation and the engine receives in particular waterproof, may preferably have a spindle or a Torpedoform to keep the flow resistance low.
- the propeller shaft may, for example, be indirectly or directly connected to the engine, in particular a motor shaft.
- Example of an indirect connection is the connection via an intermediate gear, which outputs the speed of the motor or the motor shaft with speed increase or speed reduction to the propeller shaft and / or depending on the configuration allows an increase in speed or speed reduction from the motor shaft to the propeller shaft when the motor shaft and the drive shaft are not aligned.
- the intermediate gear may, for example, have at least one planetary gear.
- the propeller shaft in particular in a direct connection of the motor shaft with the propeller shaft, the propeller shaft may be the motor shaft or vice versa.
- the motor shaft is connected to the propeller shaft such that rotation of the motor shaft about its motor shaft axis of rotation, and in particular relative to the surfboard, causes rotation of the propeller shaft about its propeller shaft axis of rotation and in particular relative to the surfboard. Rotation of the motor may thus cause rotation of the propeller shaft and thus of the propeller, when it is attached to the propeller shaft, so that propulsion for the watercraft is effected.
- a recess is provided which forms a channel extending along the longitudinal axis of the surfboard and open towards the bottom.
- the recess is open over its entire length to the bottom.
- the recess or the channel is elongated and extends along the longitudinal axis of the surfboard.
- the length of the recess along the longitudinal axis is greater than the width, in particular the largest width of the recess transverse to the longitudinal axis.
- the drive is arranged so that the area swept by the propeller extends partially through the recess.
- Under the swept by the propeller Surface is understood to be the circular disk within which the blades of the propeller are moved as it rotates.
- the swept by the propeller surface is thus perpendicular or normal to the propeller shaft axis of rotation.
- one blade rotates through the depression during one part of the revolution and outside the depression during another part of the revolution.
- the area swept by the propeller is arranged transversely to the longitudinal direction of the depression or of the channel.
- the area swept by the propeller is partially out of the well, with the proportion of the area swept by the propeller, which is outside the well, being greater than the proportion of the area swept by the propeller that is through the well runs. Most of the swept area is thus outside of the well, with the smaller portion inside the well.
- the area swept by the propeller can extend up to 30%, in particular from 10 to 30%, through the depression. As particularly advantageous in terms of strength of the surfboard and driving dynamics has been found that about 15 to 25% of the swept by the propeller surface can pass through the recess.
- the particular advantage that the swept by the propeller surface partially passes through the depression is that the propeller shaft axis of rotation and thus the resultant of the thrust vector closer to the underside of the surfboard than in conventional, in particular known from DE 44 04 241 AI surfboards.
- the smaller distance causes the driving dynamics to be improved. Since the distance to the underside of the surfboard is lower, the torque is reduced by the pitch axis of the surfboard, whereby the surfboard is not lifted as much out of the water as the surfboard from DE 44 04 241 AI.
- the arranged on the underside of the surfboard engine is located in front of the propeller, there is also the advantage that the recess of the surfboard does not require excessive thickening of the surfboard, because unlike in DE 44 04 241, the engine and transmission elements above the Propellers integrated into the surfboard can be omitted or at least arranged differently.
- the drive may have a propeller shaft, which is rotatable about a propeller turning axis and to which the propeller is fastened.
- the propeller shaft axis of rotation is parallel to the longitudinal axis of the surfboard and / or outside the vertical arranged.
- the distance from the underside of the surfboard to the propeller shaft axis of rotation may be less than the distance of the propeller shaft axis of rotation to the lowest point of the recess.
- the recess may have a front recessed area and a rear recessed area.
- the propeller may be disposed between the front recessed area and the rear recessed area. This area can be called, for example, propeller or intermediate area.
- the front recessed area starts or preferably starts in the back half of the surfboard in which the drive is also located. In principle, the front recess area could also begin in the front half of the surfboard, wherein it is advantageous for the maneuverability of the surfboard to start the front recess area only in the rear half of the surfboard.
- the rear pit area may extend to the back of the surfboard.
- the depth of the recess increases from the beginning of the front recess portion toward the propeller.
- the depth of the rear recessed area decreases from the propeller to the aft of the surfboard. The depth of the recess may be greatest, especially in the area of the propeller.
- the width of the recess may increase from the beginning of the front recess area towards the propeller.
- the width of the rear recessed area may decrease from the propeller to the rear.
- the width of the recess may be greatest in the area of the propeller.
- the cross-section of the recess may increase from the beginning of the front recess area towards the propeller, whereby the cross section of the recess in the rear recess area may decrease from the propeller to the rear.
- the cross section of the recess in the region of the propeller is largest.
- the cross-sectional area, the depth and / or the width of the front recessed area may increase from the beginning to the propeller, in particular increase monotonically.
- the shape of the first and second recessed portions may be such that the width to the propeller decreases or at least remains the same, which advantageously an even better or at least other flow of the propeller is achieved.
- the cross-sectional area, the depth and / or the width of the rear recessed area can decrease from the propeller to the end of the rear recessed area, in particular monotonically decrease.
- the design of the recess allows the water to flow through the front recessed area toward the propeller and through the second recessed area away from the propeller.
- the front and rear recessed area, in particular the entire recess is preferably designed flow-optimized, so that turbulence is avoided as possible.
- a step or edge can be arranged in the region of the transition from the front recessed area to the rear recessed area, whereby the depth of the recess increases abruptly or discontinuously from the front recessed area at the step or edge. This causes backflow of water from the rear recessed area into the front recessed area to be prevented or at least reduced.
- the step or edge is designed so that this effect occurs.
- the height of the step or edge is greatest at its lowest point in the depression and may decrease toward the side flanks of the depression, i. that is, the step or edge becomes smaller toward the sidewalls.
- the step or edge may transition into the side flank so that the height of the step or edge on the side flanks is negligible or the step or edge disappears in the side flanks.
- the step or edge can be arranged between the propeller and the front recessed area.
- the step or edge in the flow direction in front of the propeller, d. H. be arranged upstream of the propeller.
- the step or edge is located close to the propeller, especially near its propeller tips.
- the front recess area may have a first recess section and a second recess section, between which a web is arranged, which separates the first recess section and the second recess section from one another.
- the first recessed portion and the second recessed portion extend, each of which may be elongated, along the longitudinal axis of the surfboard, in particular parallel to each other or at least approximately parallel to each other.
- the first recessed portion and the second recessed portion may be arranged mirror-symmetrically with respect to the longitudinal axis of the surfboard.
- the web formed between the first and second recessed portions may be elongate, and the end of the web facing the propeller may be rounded.
- the beginning of the first recess portion and / or the second recess portion may form the beginning of the front recess portion.
- the beginning of the first recessed portion and the beginning of the second recessed portion may each be rounded, in particular have an approximately parabolic, hyperbolic or elliptical shape.
- the first recessed portion and / or the second recessed portion may have a concave shape of the bottom of the recessed portion.
- the first recessed portion and / or the second recessed portion may each have a vertex that forms in cross section the lowest point of the recessed portion, wherein the vertex may be arranged asymmetrically with respect to the central axis of the respective recessed portion. This has the advantage that the first and second recessed sections can flow into a collecting section in a flow-optimized manner.
- a collecting section of the first recessed area, into which the first recessed section and the second recessed section open, can be arranged between the propeller and the web and / or between the propeller and the first and second recessed sections.
- the web can have a fastening device, in particular a receptacle for the drive, on which the drive is mechanically connected to the surfboard or can be connected.
- the fastening device is preferably designed such that the drive is detachably arranged on the fastening device, such as detachable, for example by loosening a screw.
- the propeller can be surrounded over its rotation circumference by a ring fixed in relation to the drive housing and / or the surfboard.
- the ring can, but does not have to be removable.
- the propeller is rotatable relative to the ring.
- the ring concentrically surrounds the propeller shaft axis of rotation.
- the ring may be closed.
- the ring may, for example, be connected to the drive housing via at least one web attached to the drive housing and to the ring.
- the ring may for example have a cylindrical shape, wherein the lateral surface of the cylinder may extend along and about the propeller shaft axis of rotation.
- the ring may have a wall thickness that is small compared to the inner diameter of the ring.
- the recess may have a groove extending around the propeller shaft axis of rotation, which may, for example, be annular section-shaped.
- the groove may have a groove depth which corresponds approximately to the wall thickness of the ring.
- the ring is preferably arranged in the groove. The advantage that the groove depth corresponds approximately to the wall thickness of the ring, is that the bottom or bottom of the recess and the inner circumference of the ring approximately evenly into one another, so that turbulence in the flow, which from the bottom or bottom in the Ring passes, can be avoided.
- the groove may have a groove width that extends along the propeller shaft axis of rotation or the longitudinal axis of the surfboard, wherein the groove width corresponds approximately to the width of the fixed ring.
- the width of the fixed ring also extends along the propeller shaft axis of rotation and / or the longitudinal axis of the surfboard.
- the groove extends around the propeller shaft axis of rotation in a circular ring section.
- the edge which forms the groove with the front recessed area, in particular with the collecting section is arranged in the shape of an annular ring about the axis of rotational shaft rotation.
- the edge which forms the groove with the rear depression region is formed in the shape of an annular ring about the propeller shaft rotation axis.
- the ring may, for example, be connected to the surfing device by means of at least one fastening element, such as a screw or a rivet, which penetrates the wall of the ring. be connected to the board.
- a fastening element such as a screw or a rivet
- the wall of the ring may be clamped between a bolt head or a nut and the surfboard in which the bolt is anchored.
- a ring segment may be provided, wherein the propeller, in particular only, is surrounded by the ring segment over a part of its rotation circumference, in particular the part of its rotation circumference located outside the depression.
- the ring segment is fixed with respect to the drive housing and / or the surfboard.
- the ring segment can be fastened with its first end facing in the circumferential direction on one side and in particular next to the recess and with its second end pointing in the circumferential direction on the other side and in particular next to the recess, in particular releasably secured, such as screwed or snapped.
- the ring segment spans the part of the rotation circumference located outside the depression.
- the ring segment allows in comparison to a closed ring an even more compact attachment of the drive to the surfboard.
- the ring segment may, for example, have a first attachment structure and a second attachment structure with which it is fastened to the surfboard, in particular laterally of the depression.
- the surfboard may, for example, have on one side a fastening receptacle for fastening the first fastening structure and on the other side a second fastening receptacle for the second fastening structure.
- the attachment receptacle can be designed, for example, as known from corresponding receptacles known to those skilled in the art for fin surfboards.
- the ring or ring segment which at least partially surrounds the propeller about its circumference may be connected to the drive housing at least via a first wing and a second wing.
- the first wing and the second wing may each be secured to the ring or ring segment and the drive housing.
- the first wing and the second wing may be configured, in particular profiled and / or adjusted relative to the flow, that the flow flowing in the propeller into the wing generates a dynamic lift, which acts in particular toward the underside of the surfboard.
- the dynamic buoyancy is thus a positive buoyancy, which acts in the same direction as the static buoyancy of the Surfboards.
- a buoyancy force is generated in the driving operation of the watercraft in dependence on the travel speed relative to the water.
- the wings may extend approximately parallel to the underside of the surfboard.
- the drive may have an electric motor, wherein a controller for controlling, in particular for power or speed control, of the electric motor is provided, wherein it is preferred that the controller is integrated into the surfboard.
- the controller may be integrated in a recess of the surfboard, which is closed with a lid, which is arranged on top of the surfboard.
- At least one heat exchanger surface, which is thermally conductively connected to the controller, may be arranged on the underside of the surfboard.
- the heat transfer coefficient between the controller and the heat exchanger surface is higher, in particular significantly higher than the heat transfer coefficient between the controller and the underside of the surfboard surrounding the heat exchanger surface.
- the heat exchanger surface which may be flat or ribbed, advantageously allows the control of the electric motor to be cooled by the water in which the watercraft is used.
- the advantage that the control of the electric motor is integrated into the surfboard and the electric motor is arranged on the underside of the watercraft is that the center of gravity of the watercraft can be optimally positioned.
- the controller may be connected to the electric motor via at least one electrical conductor, such as a cable.
- a plug may be disposed between the controller and the electric motor that allows the electric motor to be easily connected to the controller and released from the controller when the electric motor is attached to the surfboard or detached from the surfboard ,
- the plug can be arranged in the region of the fastening device of the web, wherein it is preferred that the plug is sealed with respect to the environment of the watercraft, that is to say watertight.
- the controller can be connected to a remote control, with the remote control, the controller for setting the engine power or engine speed is controlled.
- the remote control can be wired or preferably wirelessly connected to the controller or connectable.
- the remote control can be sized to be held in the hand of the surfer or attached to the wrist, for example can.
- the remote control may include a pressure sensor that generates a signal for the engine power or engine speed control depending on the amount of pressure that the surfer applies to the pressure sensor.
- the wireless connection is based on the Bluetooth standard.
- the controller may include a Bluetooth transceiver module and the remote controller may include a transceiver module.
- the drive can have an electric motor whose motor housing is mechanically connected to the surfboard in front of the propeller, in particular via the fastening device of the web.
- the electric motor may be electrically connected to an electrical energy source integrated in the surfboard.
- the electric power source may be, for example, an accumulator or a battery or a fuel cell.
- the controller is connected between the electric power source and the motor.
- the electrical energy source can be connected via an electrical conductor, in particular a cable, to the motor and / or the controller.
- the surfboard can identify a recess in which the electrical energy source is arranged.
- the recess may be closed with a lid, wherein the lid may be arranged on the upper side of the surfboard.
- the recess for the electrical energy source may be the recess for the control of the electric motor.
- the recess for the electric power source and the recess for the control may be separate recesses.
- the electrical energy source is arranged in front of the propeller, in particular also in front of the controller. This makes it possible to optimize the position of the center of gravity of the vessel even better.
- the electrical energy source with a click system allows easy installation of the electrical energy source in its recess and a simple removal of the electrical energy source from its recess.
- FIG. 1 is a cross-sectional view through the section Bl-Bl of Figure 1A, a cross-sectional view through the section IC IC of Figure IC, a cross-sectional view through the section 1D-1D of Figure 1A, a side view through the section IE- IE of Figure 1A,
- FIG. 1 a perspective view from below of a second embodiment of a water sports device according to the invention, which is based on the first embodiment and is a modification of the first embodiment,
- FIGS. 1A to H A surfboard 100 is shown in FIGS. 1A to H, and the drive 200 preferred for the surfboard is illustrated in FIGS. 2A to 2E.
- a modification (second embodiment) of the surfboard 100 shown in Figs. 1A to 2E (first embodiment) is shown in Figs. 3A to 4, the description for the first embodiment being applicable also to the second embodiment, and vice versa unless otherwise described or nothing else results from the context.
- the Surfboard 100 is board-shaped and elongated.
- the surfboard 100 has a longitudinal axis L (FIG. IG), the length Lboa of the surfboard 100 extending along the longitudinal axis L being greater than its width Bboa and / or thickness Tboa extending transversely to the longitudinal axis L.
- the surfboard 100 has a front end and a rear end. Offset to the rear end, two fins or fins are arranged, which protrude from the underside of the surfboard 100 and serve the directional stability of the surfboard 100.
- the surfboard 100 is formed of a material which gives it a positive static buoyancy. In other words, surfboard 100 floats on water.
- the top of the surfboard 100 is configured to receive a person and / or loads.
- a recess 110 is arranged, which forms a along the longitudinal axis L of the surfboard 100 extending, open towards the bottom channel, in particular from the front end d, c of the recess 110 to to the rear end T of the recess 110 is open to the bottom.
- the depression 110 is bordered by the underside or the underside surface.
- the outline of the depression which can be seen, for example, in FIG. 1A, is formed by the transition of the depression or the depression surface, which is referred to as the ground, into the underside or the underside surface.
- the depression 110 or the channel formed by it is elongate and extends along its longitudinal direction along the longitudinal axis L.
- the length of the depression 110 that extends along the longitudinal axis L is greater than the width and / or depth that is transverse to the longitudinal axis L.
- the recess 110 has a front recessed area 102 and a rear recessed area 104.
- a propeller 250 of a drive 200 is disposed between the front recessed area 102 and the rear recessed area 104.
- the front end B, C of the front recessed area 102 or the recess 110 begins in the rear half of the surfboard 100.
- the rear end T of the rear recessed area 104 or the recess 110 terminates at the rear end, which is also referred to as the rear Surfboards 100.
- the front recess portion 102 has a first recess portion 102a and a second recess portion 102b that are elongated and extend side by side along the longitudinal axis L.
- the first recessed portion 102a is laterally offset on a first side of the longitudinal axis L, with the second recessed portion 102b on the other, opposite side of the longitudinal axis L is arranged offset.
- the front end C of the recessed portion 102a and the front end B of the recessed portion 102b form the front end of the front recessed portion 102 and the recess 1, respectively.
- a fin 101 which is elongated and extends along the longitudinal axis L.
- the web 101 separates the first recessed portion 102a from the second recessed portion 102b.
- the first recessed portion 102a and the second recessed portion 102b open into a common collecting portion 102c of the front recessed portion 102.
- the collecting portion 102c is disposed between the propeller 250 and the one hand and the first recessed portion 102a, the second recessed portion 102b, and the fin 101 on the other hand.
- the front end B, C is formed by the vertex of a curve extending from the vertex to the rear end of the surfboard 100.
- the curve is formed by the transition, in particular the edge or rounding, the depression with the underside or the underside surface of the surfboard 100.
- the depth, width and / or cross section of the first recess portion 102a and the second recess portion 102b increase toward the propeller 250 from its front end B, C.
- the depth, width and / or cross section of the rear recessed area 104 decreases from the propeller 250 to the rear end T.
- a groove 103 is formed, which extends in the form of an annular ring about a propeller shaft rotation axis Rp (FIG. 2D) of the propeller 250 and has a groove depth.
- the groove depth is measured from the upper edge of the groove 103, which forms it with the front transition region 102 or the rear transition region 104.
- the bottom surface of the recessed portion 102a, 102b is concaved, with the apex of the concave shape with respect to the top edges bordering the recessed portion 102a or 102b being disposed asymmetrically or staggered with respect to the longitudinal axis L. ( Figure 1B). This allows a flow-optimized transition from the first and second recessed portions 102a, 102b into the collecting portion 102c.
- the groove 103 has a groove width B103 extending along the longitudinal axis L, which has approximately the width L 3 of the ring 201 which extends along the longitudinal axis L.
- a drive 200 which has an electric motor, arranged so that the swept by the propeller 250 of the drive 200 surface A P (dotted circle in Figure IC) partially through the recess 110, in particular by the area between the front recessed area 102 and the rear recessed area 104.
- the area swept by the propeller area Ap 250 extends in a proportion Ap2 outside the depression and with a proportion of Apl of the propeller 250 überstri- rupted area A p by the recess 110.
- the proportion Ap2 is greater than the proportion p A l (Fi - gr IC).
- the drive 200 comprising the electric motor has a motor shaft rotation axis R M (FIG. 2D) which is aligned with the propeller shaft rotation axis Rp, ie lies on a common axis and is parallel to the propeller shaft rotation axis Rp.
- the spindle-shaped or torpedo-shaped drive housing 210 is immovably connected to a cylindrical ring 201 via a plurality of webs 202a, 202b and 202c. Two of the webs are configured as wings, namely as first wing 202a and second wing 202b.
- the first and second wings 202a, 202b are horizontal, in particular approximately parallel to the underside of the surfboard.
- the first and second wings 202a, 202b have a cross-sectional profile which causes positive dynamic lift A D , ie dynamic lift A D directed to the surfboard 100 when the water flowing into the propeller 250 flows around the wings 202a, 202b.
- the first and second vanes 202a, 202b are disposed in front of the propeller 250, that is, on the suction side of the propeller 250.
- the vanes 202a, 202b and the ridge 202c are fixed to the cylindrical ring 201 and the drive housing 210, respectively.
- the ring 201 surrounds the propeller 250 about its circumference and protects against radial access to the propeller 250 and thus from injury by the propeller 250.
- the ring 201 has a wall thickness Ws which is small compared to the diameter DR and approximately the depth of the groove 103 corresponds, in which the ring 201 is at least partially disposed. This results in a smooth transition from the front and rear recessed areas. Chen ensured on the inner circumference of the ring 201.
- the width L3 of the ring 201 corresponds approximately to the width B103 of the groove 103. As a result, turbulences are even better avoided.
- the ring 201 is fixed to the surfboard 100 by means of bolts 207 extending through the ring 201 and radially to the center axis thereof. The annular wall is clamped between the screw head of the bolt 207 and the surfboard 100, in particular the groove bottom of the groove 103.
- the drive housing 210 is connected to the surfboard 100 via a fastening device 101a, which is formed on the web 101, immovably and unschwenkbar.
- the drive 200 can be fastened, for example by means of threaded bolts, to the surfboard 100, in particular to the fastening device 101a. This attachment can be solved by loosening the bolts, so that the drive 200 can be removed from the surfboard and possibly replaced with another.
- the fastening device 101a further forms a first electrical plug connection part 101b, wherein the drive 200 has a second electrical plug connection part 21 1 which is electrically contactable or connectable to the first electrical plug connection part 101b, so that an electrical energy source 400 and / or a controller 300 (FIG 1H) is electrically connected to the motor of the drive 200 is connectable.
- a seal is provided, which seals at least the electrical connector 101b, 21 1 watertight.
- the propeller 250 has several, in this example, three wings, which protrude from the rotor shaft to the outside, in particular radially outwardly.
- the rotor shaft is rotatable together with the blade of the rotor 250 about the rotor shaft rotation axis Rp relative to the drive housing 210.
- the watercraft further includes a controller 300 which is electrically connected between an electrical energy source 400 and the drive 200.
- the energy required for the drive is provided by the electrical energy wave 400, which in the example shown is an accumulator.
- the speed of the propeller 250 is controlled by the control 300 controlled.
- the controller 300 may include, for example, a remote control element at which the user, particularly the surfer, may adjust the speed of the engine.
- the remote control may be wired or wirelessly connected to the controller 300 so that the controller 300 is controllable with the remote control.
- the surfboard 100 has a recess for the power source 400 and a further recess, which is separated from the first recess, for the controller 300.
- the access to the controller 300 and the electric power source 400 are possible from the top of the surfboard 100.
- the opening facing the top of the recess for the electrical energy source 400 is closed by means of a removable cover and sealed watertight to the environment.
- the top of the surfboard 100 facing opening of the recess for the controller 300 is sealed by means of a removable lid, and sealed waterproof to the environment.
- the power source 400 is electrically connected to the controller 300 via at least one cable.
- the controller 300 is electrically connected to the drive 200 via at least one cable and the electrical connector 101b, 211.
- the controller 300 is connected via a primalleittell with at least one heat exchanger surface 500, in this example, two heat exchanger surfaces 500, which is arranged on the underside of the surfboard 100 ( Figure IG) thermally conductively connected. Heat generated by the controller 300 may be dissipated via the at least one heat exchanger surface 500 to the water flowing on the underside of the surfboard 100, thereby cooling the controller 300.
- a portion of the water flowing along flows through the front recessed area 102 through the propeller 250 and is ejected along the longitudinal axis L toward the rear end of the surfboard 100, passing through the rear recessed area 104.
- Another portion of the underside of the surfboard 100 is along flowing water flows around the drive housing 210 and the wings 202a, 202b, whereby a positive dynamic lift is generated.
- the water expelled from the propeller 250 along the longitudinal axis L drives the surfboard 100 in the direction of travel. By shifting the weight of the person on the top of the surfboard 100, the surfboard can turn or drive straight.
- the distance Lmin which denotes the distance of the fastening device 101a from the first and second connecting portions 102a, 102b, is preferably greater than 5 mm. In particular, the distance Lmin may be less than 50mm.
- the length LA which denotes the distance between the rear end T of the surfboard 100 and the force introduction point A of the propeller 250 or the propeller 250, is approximately 0.2 to 0.3 times the total length Lboa of the surfboard 100.
- the Force introduction point A is the average point of the propeller pitch or the propeller hub length projected on the longitudinal axis L.
- the length LI denotes the distance of the first or second recess portion 102a, 102b from the force introduction point A or the propeller 250 from the location at which the first or second recess portion 102a, 102b has a width L6 extending transversely to the longitudinal axis L, which is approximately equal to that of FIG 0.3 to 0.5 times the transverse to the longitudinal axis L extended width L7 of the recess 110 in the region of the propeller 250 corresponds.
- the maximum width of the first and / or second recessed portions 102a, 102b is greater than the width L6, i. greater than 0.3 to 0.5 times the width L7 of the recess 110 in the region of the propeller 250 that is transverse to the longitudinal axis L.
- the distance L5 between the front ends of the first and second recessed portions 102a, 102b which are formed as vertices corresponds approximately to 0.5 to 0.9 times the width L7 of the recess 110 in the area of the propeller 250 that is transverse to the longitudinal axis L.
- the overall center of gravity of the watercraft is preferably by the distribution of the components 200, 300 and 400 so that it is located approximately in the middle, in particular approximately in the middle third or middle fifth, between the front and the rear end of the surfboard 100.
- the width L7 is approximately, in particular ⁇ 5%, 2 ⁇ L9 ⁇ (DRa-L9), wherein L9 designate the depth of the recess 110 in the area of the propeller 250 and DRa the outer diameter of the ring 201.
- the depth L9 of the recess 110 in the region of the groove 103 is preferably such that the minimum board thickness, which results from the difference between the thickness Tboa of the board 100 and the depth L9, is at least 10 mm, preferably between 10 and 40 mm , As a result, the stability of the board 100 is not jeopardized and there is still enough static buoyancy, especially in the stern area of the surfboard 100.
- the depth of the groove 103 which corresponds approximately to the wall thickness Ws of the ring 201, is about 2 to 5 mm, preferably 2.5 mm.
- the width L3 of the ring 201 which corresponds approximately to the width B103 of the groove 103, depends in particular on at least one of the pitch of the propeller 201, the width of the propeller 201 along the longitudinal axis L, and the overall hub length.
- the ring inner diameter DRi preferably results from the sum of the propeller diameter Dpro and an annular gap between the propeller 201 and the ring 201. It has been found that the annular gap depends on the propeller pitch and the propeller pitch. rotation speed.
- the annular gap can be about 1 to 10 mm, in particular for a speed range of 1000 to 3000 1 / min. In particular, the annular gap allows a contact of the propeller tips with the inner circumference of the ring 201 when cornering due to the possible distortion of the ring 201 is prevented.
- the propeller may have at least one of a diameter of about 178 mm to 305 mm, a pitch of 178 to 254 mm and a propeller hub length of about 40 to 70 mm.
- the depression extends at an angle a2 and ß2 to the point H or from the point J to the point K.
- the points H and K are measured at a distance L4 from the point A.
- the width L8 of the recessed region 104 in the distance L4 from the propeller 250 or the force application point A, which is extended along the longitudinal axis L, can be in particular between 0.4 and 0.8 times the width L7.
- the length L4 may be e.g. LA minus about 80 to 120mm, preferably 100mm amount.
- the geometry of the outlet opening from the points H and K results from the rear geometry of the surfboard 100 and the angles a2 and ß2.
- the angles a2 and ß2 are preferably in direct relation to L7 and L9 ( Figure IC).
- the surfboard according to the second embodiment is substantially different from a ring segment 270 and a step 107 disposed between the front portion 102 and the rear portion 104 of the first embodiment.
- a step 107 is arranged at the lowest point of the depression 110, with which the front portion 102 abruptly merges into the rear portion 104.
- the step 107 is designed so that it prevents or at least restricts a backflow of water against the flow direction, ie from the rear portion 104 into the front portion 102. This increases the efficiency.
- the step 107 is located in front of the propeller tips, ie, as best seen in Figure 3D, between the front Section 102 and the propeller tips.
- the height of the step 107 is greatest at the lowest point of the step in the recess 110, the height of the step decreasing towards the flanks of the recess 110.
- a ring segment 270 in particular a cylinder-shaped annular segment, extends over the part of the rotational circumference of the propeller 250 which is located outside the depression 110.
- the ring segment 270 is fixed to the underside of the surfboard 100 with its first circumferential end having a first attachment structure 271 a. With the other, second, circumferential end having a second attachment structure 271b, the ring segment 270 is secured to the underside of the surfboard 100 on the opposite side of the depression 110.
- a fastening receptacle 272 for the first mounting structure 271a is arranged, wherein on the opposite, second side next to the recess 110 on the underside of the surfboard 100, a mounting receptacle 272 for the second mounting structure 271b is arranged.
- the attachment structure 271a, 271b is connected to its respective attachment receptacle 272 by means of one or more bolts.
- the attachment structures 271a, 271b with their respective attachment receptacle can form a plug-in or latching mechanism.
- the energy source 400 in particular a battery or a rechargeable battery, can be fastened to the surfboard 100 by means of fastening means 403, in particular threaded bolts.
- a trough 401 is firmly integrated, are provided in the terminals 405 for electrically contacting the power source 400.
- the trough 401 has threaded holes 402 for the fastening means 403 at its upper edge.
- a magnetic plug 406 is arranged, which serves for the transmission of data information between the power source 400 and controller 300.
- a seal 404 in particular rubber seal is arranged, which seals the area between the trough 401 and the power source 400 liquid-tight.
- the or the connection contacts 405 may in particular be pin-shaped and are connected to the motor 200, in particular via the controller 300.
- the energy source 400 can be inserted from the top of the surfboard 100 into the surfboard, in particular the trough 401, or removed from the trough 401.
- a rotary knob 600 At the top of the surfboard 100 is a rotary knob 600, in particular a digital knob on which the engine power or the engine speed is adjustable. Also at the top of the surfboard 100 is a display 650 on which any information, such as the charge capacity of the battery, the current engine power, engine speed, etc. can be displayed.
- a remote control may be provided, with which the engine power or the engine speed is adjustable and which, for example, wired or preferably wireless, such as via the Bluetooth standard, connected to the controller 300 or connected.
- the engine power or speed can be adjusted, for example, either via the rotary knob 600 or via the remote control.
- the electronics of the controller 300 may be configured such that the engine power or speed is selectively adjustable with the rotary knob 600 or the remote control. For example, should the remote control be lost or out of range of the controller 300, the engine power or speed may be adjusted via the rotary knob 600.
- the electronics may be configured such that the engine power or speed can be adjusted via the rotary knob 600, even if the remote control is connected to the controller 300 and activated (INCLUSIVE-OR circuit).
- the rotary knob 600 may be deactivated when the remote control is connected to the controller 300 and activated. If, for example, the remote control is lost or gets out of reach of the control, the rotary knob 600 can be automatically activated. In another alternative, if the remote control is connected to and activated by the controller 300, automatic deactivation of the remote control may take place when an input is made via the rotary knob 600.
Landscapes
- 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)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102013218735.1A DE102013218735A1 (de) | 2013-09-18 | 2013-09-18 | Surfboard mit Antrieb |
PCT/EP2014/069521 WO2015039970A1 (de) | 2013-09-18 | 2014-09-12 | Surfboard mit antrieb |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3046834A1 true EP3046834A1 (de) | 2016-07-27 |
EP3046834B1 EP3046834B1 (de) | 2019-12-18 |
Family
ID=51539271
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14765938.7A Active EP3046834B1 (de) | 2013-09-18 | 2014-09-12 | Surfboard mit antrieb |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3046834B1 (de) |
DE (2) | DE102013218735A1 (de) |
WO (1) | WO2015039970A1 (de) |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9359044B2 (en) | 2013-10-10 | 2016-06-07 | Jacob Willem Langelaan | Weight-shift controlled personal hydrofoil watercraft |
DE202016103173U1 (de) * | 2016-06-15 | 2016-07-06 | Maikel Lambregts | Elektromechanischer Antrieb für eine schwimmfähige Vorrichtung |
USD843303S1 (en) | 2016-07-08 | 2019-03-19 | MHL Custom, Inc. | Hydrofoil board |
US10597118B2 (en) | 2016-09-12 | 2020-03-24 | Kai Concepts, LLC | Watercraft device with hydrofoil and electric propeller system |
EP3732098B1 (de) | 2017-12-27 | 2023-08-02 | Ride Awake AB | Elektrisches motorwasserfahrzeug und antriebssystem |
CN110356524A (zh) | 2018-04-10 | 2019-10-22 | 优机国际有限公司 | 推进模块及包含其的冲浪设备 |
CN108974298A (zh) * | 2018-09-25 | 2018-12-11 | 天津昊野科技有限公司 | 一种电动水翼冲浪板专用推进器 |
USD995678S1 (en) | 2020-01-03 | 2023-08-15 | Ride Awake Ab | Electronically propelled surfboard |
SE544838C2 (en) * | 2020-01-03 | 2022-12-06 | Ride Awake Ab | Motorized watercraft |
US11897583B2 (en) | 2020-04-22 | 2024-02-13 | Kai Concepts, LLC | Watercraft device with hydrofoil and electric propulsion system |
US10946939B1 (en) | 2020-04-22 | 2021-03-16 | Kai Concepts, LLC | Watercraft having a waterproof container and a waterproof electrical connector |
US11981457B1 (en) | 2020-12-14 | 2024-05-14 | Bae Systems Space & Mission Systems Inc. | Multipurpose spacecraft structure and propulsion system |
US11485457B1 (en) | 2021-06-14 | 2022-11-01 | Kai Concepts, LLC | Hydrojet propulsion system |
US11878775B2 (en) | 2021-07-13 | 2024-01-23 | Kai Concepts, LLC | Leash system and methods of use |
DE202022103999U1 (de) | 2022-07-15 | 2022-07-26 | Markus Schilcher | Motorisiertes Surfboard |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB526997A (en) * | 1939-03-31 | 1940-09-30 | John Denis Heslop | Improvements in power-driven surf boards |
US3548778A (en) * | 1968-10-10 | 1970-12-22 | Surf Jet Mfg Inc | Self-propelled surfboard |
GB2053805A (en) * | 1979-07-16 | 1981-02-11 | Dimmick R J C | Self propelled surf boards |
DE4404241A1 (de) | 1994-02-10 | 1995-08-17 | Rolf Peter Dipl Ing Beyer | Surfboard mit motorischen Antrieb |
FR2728863A1 (fr) * | 1994-12-30 | 1996-07-05 | Bourgault Yves Marie Roger | Planche a moteur |
SE516426C2 (sv) * | 2000-05-09 | 2002-01-15 | Torbjoern Eriksson | Skrov- och propelleranordning |
TW200831353A (en) * | 2007-01-16 | 2008-08-01 | Joy Ride Technology Co Ltd | Electric surfboard |
US8070544B2 (en) | 2009-07-01 | 2011-12-06 | Roman Kendyl A | Clean energy powered surfboards |
CN102596708B (zh) * | 2009-10-27 | 2015-05-06 | 克里斯托弗·普雷斯顿 | 用动力推动的水运动板 |
-
2013
- 2013-09-18 DE DE102013218735.1A patent/DE102013218735A1/de not_active Withdrawn
- 2013-09-18 DE DE202013012451.2U patent/DE202013012451U1/de not_active Expired - Lifetime
-
2014
- 2014-09-12 WO PCT/EP2014/069521 patent/WO2015039970A1/de active Application Filing
- 2014-09-12 EP EP14765938.7A patent/EP3046834B1/de active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2015039970A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE102013218735A1 (de) | 2015-03-19 |
EP3046834B1 (de) | 2019-12-18 |
WO2015039970A1 (de) | 2015-03-26 |
DE202013012451U1 (de) | 2016-11-17 |
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