Adjustable device and a boat provided with a stabilizing device

1. Adjustable boat stabilizing device, pivotally arranged about a pivot axis ( 230 , 230 a , 230 b ) by means of a rotating electric motor ( 213 ) having a rotor ( 215 ) and a stator ( 216 ) via a reduction gearing ( 214 ) for reducing the rotation of the motor to an adjustment movement of the adjustable device ( 4 a , 4 b , 104 a , 104 b ), wherein the reduction gearing ( 214 ) is a planetary gearing, the axis of the electric motor ( 213 ) is coaxial with the axis of said reduction gearing ( 214 ) and with the pivot axis ( 230 , 230 a , 230 b ) of said adjustable device ( 4 a , 4 b , 104 a , 104 b ) and the reduction gearing ( 214 ) and the electric motor ( 213 , 213 a , 213 b ) to form a compact construction, and wherein a hub ( 218 ) is the output of the planetary gearing ( 214 ) and the electric motor ( 213 , 213 a , 213 b ) and the reduction gearing ( 214 ) are fitted in a cylindrical space defined by two bearings ( 223 , 224 ) for pivotal movement of the hub ( 218 ), which bearings ( 223 , 224 ) are fixed in a casing ( 225 ) arranged to be secured to a hull ( 2 ) of the boat, and wherein said adjustable device is at least one of a fin and a paddle.

2. The adjustable device according to claim 1 , wherein the rotor ( 215 ) of the motor has an extension ( 217 ) that directly constitutes an input of the planetary gearing ( 214 ).

3. The adjustable device according to claim 1 , wherein the hub ( 218 ) is the output of the planetary gearing ( 214 ) and the adjustable device ( 211 ) is directly attached to the hub ( 218 ).

4. The adjustable device according to claim 3 , wherein a single unit is arranged with a casing ( 225 ) supporting at least one bearing ( 223 ) for the pivotal movement the hub ( 218 ), said bearing ( 223 ) having a diameter (D) in the range of 0.7 H≤D≤2H, wherein H is the height of the unit, comprising the motor ( 213 ) and the gearing ( 214 ).

5. The adjustable device according to claim 4 , wherein the height (H) of the unit comprising the motor ( 213 ) and the gearing ( 214 ) is about the same as or less than a width (W) of the single unit.

6. The adjustable device according to claim 5 , wherein the interior of the unit comprising the motor ( 213 ) and the gearing ( 214 ) is sealed against water by a sealing ( 222 ).

7. The adjustable device according to claim 1 , wherein at least one of said bearings ( 223 ) is a roller bearing.

8. The adjustable device according to claim 1 , wherein the adjustable device ( 211 ) is freely rotatable over +360°.

9. The adjustable device, according to claim 1 , wherein said casing ( 125 ) is arranged to be attached from the inside to the hull ( 2 ).

10. A boat having the adjustable stabilizing device according to claim 1 , including at least two adjustable devices ( 4 a , 4 b , 104 a , 104 b ) mounted on the hull ( 2 , 102 ) of the boat, each adjustable device ( 4 a , 4 b , 104 a , 104 b ) being rotatable around a respective rotational axis ( 6 a , 6 b ), which stabilizing device is arranged to be set in an operation mode at which each adjustable device ( 4 a , 4 b , 104 a , 104 b ) is arranged to be rotatable around its rotational axis ( 6 a , 6 b ) or in a resting position at which each adjustable device ( 4 a , 4 b , 104 a , 104 b ) is arranged to be stationary, wherein each adjustable device ( 4 a , 4 b , 104 a , 104 b ) is mounted on a transom ( 3 , 7 , 103 ) of the hull ( 2 , 102 ), in the operation mode reaches at least one of laterally and vertically outside the transom ( 3 , 7 , 103 ), and in the resting position is shielded by the transom ( 3 , 7 , 103 ), and whereby each adjustable device ( 4 a , 4 b , 104 a , 104 b ) is arranged to change between operation mode and resting position by rotation around its rotational axis ( 6 a , 6 b ).

11. The boat according to claim 10 , wherein each rotational axis ( 6 a , 6 b ) forms an angle of less than 30° with a line parallel to a longitudinal axis of the boat, the angle is in the range of 0 to 10°.

12. The boat according to claim 10 , wherein said adjustable device is in the form of a paddle ( 4 a , 4 b , 104 a , 104 b ) provided with shaft means and interconnecting arms ( 5 a , 5 b , 105 a , 105 b ) for providing the rotation of the paddle ( 4 a , 4 b , 104 a , 104 b ), which shaft means is aligned with the respective rotational axis ( 6 a , 6 b ) and is drivingly connected to drive means.

13. The boat according to claim 10 , wherein the boat further includes sensing means ( 131 , 132 , 133 ) sensing at least one parameter indicative of a rolling of the boat around a longitudinal axis of the boat, and wherein said parameter is an angular position of the boat around said longitudinal axis, a first time derivate of said angular position or a second time derivate of said angular position or wherein said parameter is obtained by processed data from a plurality of said sensed parameters, wherein said parameter governs the rotation of each paddle ( 4 a , 4 b , 104 a , 104 b ).

14. The boat according to claim 10 , wherein the boat includes a speed measuring device measuring a speed of the boat, and a control device arranged to position each paddle ( 4 a , 4 b , 104 a , 104 b ) in said resting position when the speed is above a certain threshold and to set the paddle in said operation mode when the boat speed is at or below said threshold.

15. The boat according to claim 14 , wherein the threshold is in a range of 10 to 15 knots (5.1-7.6 m/s).