CN116691987A - Fin driving device, fin device and ship - Google Patents

Abstract

The application discloses a fin driving device, a fin device and a ship. The fin driving device comprises a first bracket and a rotating assembly; the first bracket is used for being rotatably arranged on the hull of the ship around a first shaft, and the fin plate can rotate around a second shaft relative to the first bracket; the first end of the rotating component is rotatably arranged on the first bracket around the third shaft, and the second end of the rotating component is rotatably connected to the fin plate around the fourth shaft, so that the rotation of the rotating component can drive the fin plate to rotate around the second shaft. Therefore, the first support can rotate around the first shaft, the fin plate can rotate around the second shaft relative to the first support, so that the first support can rotate around the second shaft in real time according to the channel environment of the ship, the position of the first support is adjusted, the fin plate can rotate relative to the first support in real time, the position of the fin plate relative to the first support is adjusted, the gesture of the fin plate is adjusted, and the position of the fin plate can be adapted to the current channel environment of the ship.

Description

Fin driving device, fin device and ship

Technical Field

The application relates to the field of ships, in particular to a fin driving device, a fin device and a ship.

Background

Nowadays, the application of ships is becoming more and more widespread. While some vessels are provided with fins to improve the rudder performance of the vessel.

The channel environment of the ship is more and more complex. And the fin is fixedly arranged on the hull of the ship. Thus, the fin has a fixed attitude and is difficult to adapt to complex channel environments.

To this end, the present application provides a fin drive, a fin arrangement and a vessel to at least partially solve the above-mentioned problems.

Disclosure of Invention

In the summary, a series of concepts in simplified form are introduced, which will be further described in detail in the detailed description. The summary of the application is not intended to define the key features and essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.

To at least partially solve the above technical problem, the present application provides a fin drive for a marine vessel, the fin drive comprising:

the first bracket is used for being rotatably arranged on the hull of the ship around a first shaft parallel to a first horizontal direction in the axial direction, the first bracket is used for arranging the fin plate so that the fin plate can rotate around a second shaft parallel to a second horizontal direction in the axial direction relative to the first bracket, the first horizontal direction is perpendicular to the second horizontal direction, and a third shaft parallel to the second horizontal direction in the axial direction is arranged on the first bracket;

the first end of the rotating component is rotatably arranged on the first bracket around the third shaft, and the second end of the rotating component is rotatably connected to the fin plate around a fourth shaft which is parallel to the second horizontal direction along the axial direction, so that the rotation of the rotating component can drive the fin plate to rotate around the second shaft.

According to the fin driving device, the first support can rotate around the first shaft, the fin can rotate around the second shaft relative to the first support, so that in the case that the fin driving device is used for a ship, the first support can rotate around the second shaft in real time according to the channel environment of the ship, the position of the first support is adjusted, the fin can rotate relative to the first support in real time, the position of the fin is adjusted, the posture of the fin is adjusted, and the position of the fin can be adapted to the current channel environment of the ship.

Optionally, the rotation assembly comprises a first arm, a second arm, a first driving part and a fifth shaft, one end of the first arm is rotatably arranged on the first bracket around the third shaft, the second end of the first arm is rotatably connected to one end of the second arm around the fifth shaft, which is parallel to the axial direction of the third shaft, the other end of the second arm is used for being rotatably connected to the fin plate around the fourth shaft, and the first driving part is connected to one of the first arm and the second arm for driving one of the first arm and the second arm to rotate.

Optionally, the first support has dodges the hole, and fin drive arrangement includes first axle, first gear, second gear and second drive part, and first axle is used for setting up in the hull of boats and ships, and first axle wears to locate to dodge the hole to make first support can rotate around first axle, and the second gear is connected to first axle, first gear and second gear engagement, and second drive part is connected to first support, and second drive part's output shaft is connected to first gear for driving first gear rotation.

Optionally, the first shaft is connected to the first bracket, the fin driving device further comprising a first moving assembly connected to the first shaft and the hull of the vessel for driving the first shaft to move in a first horizontal direction.

Optionally, the first moving assembly includes a rack, a third gear and a third driving part, the rack being disposed along an axial direction of the first shaft in a length direction, the rack being connected to the first shaft, the third gear being engaged to the rack, the third driving part being for connection to the hull, an output shaft of the third driving part being connected to the third gear for driving the third gear to rotate.

Optionally, the fin driving device further comprises a second moving assembly and a moving seat, the moving seat is used for being connected to the fin through a second shaft so that the fin rotates around the second shaft, a first end of the rotating assembly is connected to the moving seat, the moving seat is connected to the first support, and the second moving assembly is connected to the moving seat so as to drive the moving seat to move along the height direction of the first support.

Optionally, the second moving assembly includes a hydraulic cylinder, a cylinder body of the hydraulic cylinder is connected to the first bracket, and a piston shaft of the hydraulic cylinder is disposed along a height direction of the first bracket and connected to the moving seat.

Optionally, the fin driving device further comprises an upper limiting piece, a lower limiting piece, a horizontal limiting piece, a guide rail and a sliding block,

the length direction of the guide rail is parallel to the height direction of the first bracket, the guide rail is connected to the first bracket, the sliding block is connected to the movable seat, the sliding block is connected to the guide rail to guide the movement of the movable seat along the height direction of the first bracket,

the upper limiting piece and the lower limiting piece are both connected to the first bracket, the upper limiting piece is positioned above the lower limiting piece along the height direction of the first bracket, the movable seat is positioned between the upper limiting piece and the lower limiting piece,

the horizontal limiting piece is used for being arranged on the ship body, is located on the side of the first shaft along the axial direction of the first shaft, and is used for blocking the first shaft.

Optionally, the first shaft is a sleeve structure, the sleeve structure is sleeved on a supporting shaft of the ship, and the third gear is used for being connected to the supporting shaft.

The application also provides a fin arrangement for a vessel, the fin arrangement comprising:

a fin; and

the fin driving device.

According to the fin device of the application, the fin device comprises the fin driving device, the first support can rotate around the first shaft, and the fin can rotate around the second shaft relative to the first support, so that in the case that the fin driving device is used for a ship, the first support can rotate around the second shaft in real time according to the channel environment of the ship, the position of the first support can be adjusted, and the fin can rotate relative to the first support in real time, so that the position of the fin relative to the first support can be adjusted, the gesture of the fin can be adjusted, and the position of the fin can be adapted to the current channel environment of the ship.

The application also provides a ship comprising the fin device.

According to the ship of the application, the ship comprises the fin device, the fin device comprises the fin driving device, the first support can rotate around the first shaft, the fin can rotate around the second shaft relative to the first support, so that in the situation that the fin driving device is used for the ship, the first support can rotate around the second shaft in real time according to the channel environment of the ship, the position of the first support can be adjusted, and the fin can rotate relative to the first support in real time, the position of the fin can be adjusted relative to the first support, the gesture of the fin can be adjusted, and the position of the fin can be adapted to the current channel environment of the ship.

Drawings

In order that the advantages of the application will be readily understood, a more particular description of the application briefly described above will be rendered by reference to specific embodiments that are illustrated in the appended drawings. Understanding that these drawings depict only typical embodiments of the application and are not therefore to be considered to be limiting of its scope, the application will be described and explained with additional specificity and detail through the use of the accompanying drawings.

Figure 1 is a schematic front view of a fin drive according to a preferred embodiment of the application connected to a support shaft of a hull; and

figure 2 is a schematic side view of the fin drive of figure 1 connected to a support shaft of a hull.

Description of the reference numerals

110: first bracket 111: avoidance hole

120: first shaft 130: second shaft

140: third shaft 150: rotating assembly

151: first arm 152: second arm

153: first driving part 154: driving gear assembly

160: fourth shaft 170: supporting shaft

180: first gear 190: second gear

200: the second driving part 210: first moving assembly

211: rack 212: third gear

213: the third driving part 220: second moving assembly

221: hydraulic cylinder 222: hydraulic motor

230: the movable base 240: upper limiting part

250: lower limiter 260: horizontal limiting piece

270: guide rail 280: fin plate

290: fifth shaft

Detailed Description

In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present application. It will be apparent, however, to one skilled in the art that embodiments of the application may be practiced without one or more of these details. In other instances, well-known features have not been described in detail in order to avoid obscuring the embodiments of the application.

Preferred embodiments of the present application will be described below with reference to the accompanying drawings. It should be noted that the terms "upper," "lower," and the like are used herein for purposes of illustration only and not limitation.

Herein, ordinal words such as "first" and "second" cited in the present application are merely identifiers and do not have any other meaning, such as a particular order or the like.

In the following description, a detailed structure will be presented for a thorough understanding of embodiments of the present application. It will be apparent that embodiments of the application may be practiced without limitation to the specific details that are set forth by those skilled in the art. Preferred embodiments of the present application are described in detail below, however, the present application may have other embodiments in addition to these detailed descriptions.

The application provides a fin driving device. Fin drives are used for ships. The tail of the vessel is provided with fins 280. The fin driving means is used to drive the movement of the fin 280. Referring to fig. 1 and 2, the fin driving means is capable of driving the fin 280 to move in a first horizontal direction D1, driving the fin 280 to move in a height direction D3 of the hull, driving the fin 280 to rotate about an axis parallel to the first horizontal direction D1, and driving the fin 280 to rotate about an axis parallel to the second horizontal direction D2. When the fin driving device is disposed on the hull of the ship, the first horizontal direction D1 may be parallel to the length direction of the hull. The second horizontal direction D2 may be parallel to the width direction of the hull. The latter first bracket 110 has a height direction parallel to the height direction D3 of the hull. Thus, the first horizontal direction D1 and the second horizontal direction D2 are perpendicular.

The fin drive includes a first bracket 110 and a swivel assembly 150. The first bracket 110 may be a plate member. The first bracket 110 is adapted to be rotatably arranged to the hull of the vessel about a first axis 120. The axial direction of the first shaft 120 is parallel to the first horizontal direction D1.

The first bracket 110 is used to provide a fin 280. Thus, when the first bracket 110 rotates about the axial direction of the first shaft 120, the first bracket 110 can rotate the fin 280 about the axial direction of the first shaft 120. The fin 280 can be disposed to the first bracket 110 by the second shaft 130. The axial direction of the second shaft 130 is parallel to the second horizontal direction D2. The second shaft 130 may be fixedly disposed at a later-described movable seat 230. In this way, the fin 280 is rotatable about the second axis 130 relative to the first bracket 110.

The first bracket 110 is provided with a third shaft 140. The axial direction of the third shaft 140 is parallel to the second horizontal direction D2. The first end of the rotating assembly 150 is rotatably disposed on the first bracket 110 about the third axis 140. The second end of the swivel assembly 150 is rotatably connected to the fin 280 about the fourth axis 160. The axial direction of the fourth shaft 160 is parallel to the second horizontal direction D2. The first shaft 120, the second shaft 130, the third shaft 140, and the fourth shaft 160 are spaced apart from one another. In this way, the rotation assembly 150 is able to move for driving the fin 280 to rotate about the second axis 130. Thus, in the case of a hull acceleration, the fin 280 may be driven to rotate about the second axis 130 by the rotation assembly 150 as required if reduced parasitic drag is desired.

In this embodiment, the first bracket 110 is rotatable about the first axis 120, and the fin 280 is rotatable about the second axis 130 with respect to the first bracket 110, so that in the case of the fin driving device for a ship, the first bracket 110 can be rotated about the second axis 130 in real time according to the channel environment of the ship, thereby adjusting the position of the first bracket 110, and the fin 280 can be rotated with respect to the first bracket 110 in real time, thereby adjusting the position of the fin 280 with respect to the first bracket 110, thereby adjusting the attitude of the fin 280, and thus enabling the position of the fin 280 to be adapted to the current channel environment of the ship.

Preferably, the rotating assembly 150 includes a first arm 151, a second arm 152, a first driving part 153, and a fifth shaft 290. One end of the first arm 151 (an example of a first end of the rotation assembly 150) is rotatably provided to the first bracket 110 around the third shaft 140. The second end of the first arm 151 is rotatably connected to one end of the second arm 152 about a fifth axis 290. The axial direction of the fifth shaft 290 is parallel to the axial direction of the third shaft 140. The other end of second arm 152 (an example of a second end of swivel assembly 150) is configured to be rotatably coupled to fin 280 about fourth axis 160. The fourth shaft 160 may be fixedly disposed to the second arm 152. Thus, the first arm 151, the second arm 152, the later movable mount 230, and the fin 280 form a four-bar linkage.

The first drive member 153 includes a first drive hydraulic motor and drive gear assembly 154. The drive gear assembly 154 includes at least two meshed gears. The housing of the first driving hydraulic motor is connected to a later moving seat 230. The first drive hydraulic motor has an output shaft. An output shaft of the first drive hydraulic motor may be coupled to the drive gear assembly 154 to rotate the drive gear assembly 154. The drive gear assembly 154 may be coupled to the first arm 151 to rotate the first arm 151, thereby rotating the fin 280 via the second arm 152.

The first arm 151 is rotatable in a range of 0 ° to 100 °. The first arm 151, the second arm 152, the later movable mount 230, and the fin 280 form a four-bar linkage structure. Thus, the range of angles of rotation of the fin 280 about the second axis 130 under the influence of the four bar linkage is a predetermined range of first angles. The first predetermined range of angles may be set as desired. Thereby, the angle of rotation of the fin 280 about the second axis 130 may be defined.

It will be appreciated that in an embodiment not shown, a drive gear assembly may also be connected to the second arm to directly drive the second arm in rotation.

It will be appreciated that in an embodiment not shown, the rotating assembly may also be a cylinder. The cylinder body of the cylinder is hinged to the moving seat, which follows, and the cylinder shaft of the cylinder is hinged to the fin.

Preferably, the first bracket 110 has a relief hole 111. The fin drive comprises a first shaft 120, a first gear 180, a second gear 190 and a second drive member 200. The first shaft 120 is for being provided to the hull of a ship. The first shaft 120 is disposed through the avoidance hole 111. Thus, the first bracket 110 can rotate about the first axis 120. The second driving part 200 may be a planetary gear reducer. The second driving part 200 has an output shaft. The housing of the second driving part 200 is connected to the first bracket 110. The first gear 180 and the second gear 190 are located on the same side of the first bracket 110. The output shaft of the second driving part 200 is connected to the first gear 180. Thus, the second driving part 200 can rotate the first gear 180.

The second gear 190 is connected to the first shaft 120. The second gear 190 and the first shaft 120 are disposed coaxially with the escape hole 111. The first gear 180 and the second gear 190 are engaged. Thus, when the second driving part 200 drives the first gear 180 to rotate, the first gear 180 rotates around the first shaft 120, and thus drives the second driving part 200 and the first bracket 110 to rotate around the first shaft 120. The fin drive is thus of simple construction.

The fin drive also includes a bearing. The bearing is disposed in the relief hole 111. The first shaft 120 is inserted through the bearing. Thus, the first shaft 120 is coupled to the first bracket 110 through a bearing. The relative positions of the first shaft 120 and the first bracket 110 are fixed in the axial direction of the first shaft 120. The fin drive also includes a first moving component 210. The first moving assembly 210 is connected to the first shaft 120 and the hull of the vessel. The first moving assembly 210 is used for driving the first shaft 120 to move along the first horizontal direction D1. Thus, the first moving component 210 can drive the first shaft 120 to move along the axial direction of the first shaft 120, and further drive the first bracket 110 and the fin 280 disposed on the first bracket 110 to move along the axial direction of the first shaft 120. In this way, during the course of the vessel sailing, the position of the fin 280 relative to the hull in the first horizontal direction D1 can be adjusted as required, thereby adjusting the steering moment arm required for steering.

Further preferably, the first moving assembly 210 includes a rack 211, a third gear 212, and a third driving part 213. The length direction of the rack 211 is disposed along the axial direction of the first shaft 120. The rack 211 is fixedly coupled to the first shaft 120. The third driving part 213 may be a third driving hydraulic motor. The housing of the third drive member 213 is for connection to a hull. The third driving member 213 has an output shaft. An output shaft of the third driving part 213 is connected to the third gear 212. The third gear 212 is engaged to the rack 211. In this way, the third driving part 213 drives the third gear 212 to rotate, thereby moving the first shaft 120 in the axial direction of the first shaft 120. Thus, the first moving assembly 210 is simple in structure.

It will be appreciated that in an embodiment not shown, the first moving assembly may be a hydraulic cylinder. The cylinder of the first moving assembly is connected to the hull. The piston shaft of the first moving assembly is connected to the first shaft for driving the first shaft to move in the first horizontal direction D1.

Preferably, the first shaft 120 is a sleeve structure. The hull has a support shaft 170. The sleeve structure is sleeved on the supporting shaft 170 of the ship. The third gear 212 is for connection to the support shaft 170. Thereby, the fin driving device is compact. Further, the sleeve structure and the arrangement of the support shaft 170 can guide the movement of the first shaft 120 in the first horizontal direction D1. Further, the support shaft 170 supports the first shaft 120.

The fin drive also includes a second moving assembly 220 and a moving mount 230. The moving seat 230 is provided with a second shaft 130 and a third shaft 140. The movable mount 230 is adapted to be coupled to the fin 280 via the second shaft 130 such that the fin 280 is rotatable about the second shaft 130. The movable mount 230 is connected to a first end of the swivel assembly 150 via the third shaft 140 and is in turn connected to the fin 280 via the swivel assembly 150. In this way, the fin 280 is disposed to the mobile station 230 via the second shaft 130 and the rotating assembly 150.

The movable seat 230 is connected to the first bracket 110. The second moving assembly 220 is connected to the moving seat 230 for driving the moving seat 230 to move along the height direction D3 of the hull. In this way, the second moving component 220 can drive the moving seat 230 to move along the height direction D3 of the hull, and further drive the fin 280 to move along the height direction D3 of the hull. During the sailing of the ship, the position of the fin 280 along the height direction D3 of the hull relative to the hull can be adjusted as required, thereby controlling the rudder performance of the ship.

Further preferably, the second moving assembly 220 includes a hydraulic cylinder 221 and a hydraulic motor 222. The hydraulic motor 222 is connected to the hydraulic cylinder 221. The cylinder body of the hydraulic cylinder 221 is connected to the first bracket 110, and the piston rod of the hydraulic cylinder 221 is disposed along the height direction D3 of the hull. The piston rod of the hydraulic cylinder 221 is connected to the moving seat 230. Thus, the second moving assembly 220 has a simple structure.

It will be appreciated that in an embodiment not shown, the second movement assembly may also include a hydraulic motor, a gear and a rack. The hydraulic motor drives a gear meshed with the rack to rotate, and then the movable seat is driven to move along the height direction D3 of the ship body.

Preferably, the fin driving apparatus further comprises an upper stopper 240, a lower stopper 250, a horizontal stopper 260, a guide rail 270, and a slider.

The length direction of the rail 270 is parallel to the height direction D3 of the hull. The guide rail 270 is connected to the first bracket 110. The slider is connected to the movable mount 230. The slider is connected to a guide rail 270. In this way, the guide rail 270 and the slider interact to guide the movement of the traveling block 230 in the height direction D3 of the hull. Thereby, the movement of the movable seat 230 in the height direction D3 of the hull is smoothed.

The upper and lower stoppers 240 and 250 are connected to the first bracket 110. The upper stopper 240 is located above the lower stopper 250 in the height direction D3 of the hull. Along the height direction D3 of the hull, there is a space between the upper and lower stoppers 240 and 250, and the moving seat 230 is located between the upper and lower stoppers 240 and 250. Thus, when the movable base 230 moves to the upper limiting member 240, the upper limiting member 240 can block the movable base 230 from moving further away from the lower limiting member 250. When the movable base 230 moves to the lower limiting member 250, the lower limiting member 250 can block the movable base 230 from moving further away from the upper limiting member 240.

The horizontal limiting member 260 is configured to be disposed on the support shaft 170. The horizontal stopper 260 is located at a side of one end of the first shaft 120, which is away from the first bracket 110, in the axial direction of the first shaft 120. In this way, when the first shaft 120 moves to the horizontal stopper 260, the horizontal stopper 260 can block the movement of the first shaft 120.

Preferably, the fin driving device further comprises a first controller, a second controller, a third controller and a fourth controller. The first controller may be electrically connected to the first driving part 153 for controlling the operation of the first driving part 153. The second controller may be electrically connected to the second driving part 200 for controlling the operation of the second driving part 200. The third controller may be electrically connected to the third driving part 213 for controlling the operation of the third driving part 213. The fourth controller may be electrically connected to the hydraulic motor 222 for controlling the action of the hydraulic motor 222.

At least two of the first driving member 153, the second driving member 200, the third driving member 213, and the hydraulic motor 222 may be operated at the same time or may be operated individually. In this way, the attitude of the fin plate 280 can be effectively and reasonably adjusted to cope with different hydrodynamic performances, and further the steering effect of the rudder propeller is increased.

Preferably, the second controller may control the operation of the second driving part 200, thereby controlling the rotation angle of the first bracket 110 within the second predetermined angle range. The second predetermined angular range may be set as desired.

Preferably, the fin driving means further comprises an upper sensor and a lower sensor electrically connected to the first controller. The upper sensor is disposed at the upper limiting member 240 for collecting an upper limiting signal indicating that the movable seat 230 moves to the upper limiting member 240. The lower sensor is disposed at the lower limiting member 250 for collecting a lower limiting signal indicating that the moving seat 230 moves to the lower limiting member 250.

The fin drive further includes a level sensor electrically connected to the third controller. The level sensor is disposed at the level limiter 260 for acquiring a level limit signal indicating that the first shaft 120 moves to the level limiter 260.

The application also provides a fin device. Fin devices are used for ships. The fin means comprises a fin 280 and the fin driving means described above.

In this embodiment, the fin device includes the fin driving device described above, where the first bracket 110 is rotatable about the first axis 120, and the fin 280 is rotatable about the second axis 130 with respect to the first bracket 110, so that, in the case where the fin driving device is used for a ship, the first bracket 110 may be rotated about the second axis 130 in real time according to the channel environment of the ship, thereby adjusting the position of the fin 280 with respect to the first bracket 110, and the fin 280 may be rotated with respect to the first bracket 110 in real time, thereby adjusting the position of the fin 280, thereby adjusting the attitude of the fin 280, so that the position of the fin 280 can be adapted to the current channel environment of the ship.

The application also provides a ship. The vessel comprises a fin arrangement as described above.

In this embodiment, the ship comprises the fin device, the fin device comprises the fin driving device, the first bracket 110 can rotate around the first shaft 120, the fin 280 can rotate around the second shaft 130 relative to the first bracket 110, so that in the case that the fin driving device is used for the ship, the first bracket 110 can rotate around the second shaft 130 in real time according to the channel environment of the ship, the position of the first bracket 110 can be adjusted, and the fin 280 can rotate relative to the first bracket 110 in real time, so that the position of the fin 280 relative to the first bracket 110 can be adjusted, the gesture of the fin 280 can be adjusted, and the position of the fin 280 can be adapted to the current channel environment of the ship.

Preferably, the vessel has a full-swing tank. The fin drive may be provided in the full swing cabin.

The present application has been illustrated by the above-described embodiments, but it should be understood that the above-described embodiments are for purposes of illustration and description only and are not intended to limit the application to the embodiments described. In addition, it will be understood by those skilled in the art that the present application is not limited to the embodiments described above, and that many variations and modifications are possible in light of the teachings of the application, which variations and modifications are within the scope of the application as claimed. The scope of the application is defined by the appended claims and equivalents thereof.

Unless defined otherwise, technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. The terminology used herein is for the purpose of describing particular implementations only and is not intended to be limiting of the application. Terms such as "component" as used herein may refer to either a single part or a combination of parts. Terms such as "mounted," "disposed," and the like as used herein may refer to one component being directly attached to another component or to one component being attached to another component through an intermediary. Features described herein in one embodiment may be applied to another embodiment alone or in combination with other features unless the features are not applicable or otherwise indicated in the other embodiment.

Claims (11)

1. A fin drive for a watercraft, the fin drive comprising:

a first bracket for rotatably being provided to a hull of the watercraft about a first axis parallel to a first horizontal direction, the first bracket being for providing the fin so that the fin can rotate about a second axis parallel to a second horizontal direction with respect to the first bracket about the axial direction, the first horizontal direction being perpendicular to the second horizontal direction, the first bracket being provided with a third axis parallel to the second horizontal direction;

and the first end of the rotating assembly is rotatably arranged on the first bracket around the third shaft, and the second end of the rotating assembly is rotatably connected to the fin plate around a fourth shaft which is parallel to the second horizontal direction in the axial direction, so that the rotation of the rotating assembly can drive the fin plate to rotate around the second shaft.

2. The fin drive of claim 1, wherein the rotation assembly comprises a first arm, a second arm, a first drive member and a fifth shaft, one end of the first arm being rotatably disposed to the first bracket about the third shaft, a second end of the first arm being rotatably connected to one end of the second arm about a fifth shaft having an axial direction parallel to the axial direction of the third shaft, the other end of the second arm being for rotatably connecting to the fin about the fourth shaft, the first drive member being connected to one of the first arm and the second arm for driving the one of the first arm and the second arm to rotate.

3. The fin drive of claim 1, wherein the first bracket has a relief hole, the fin drive comprising the first shaft for being disposed in the hull of the watercraft, a first gear, a second gear, and a second drive member, the first shaft being disposed through the relief hole such that the first bracket is rotatable about the first shaft, the second gear being coupled to the first shaft, the first gear and the second gear being meshed, the second drive member being coupled to the first bracket, an output shaft of the second drive member being coupled to the first gear for driving the first gear to rotate.

4. The fin driving apparatus of claim 3, wherein,

the first shaft is connected to the first bracket, the fin driving device further comprising a first moving assembly connected to the first shaft and the hull of the vessel for driving the first shaft to move in the first horizontal direction.

5. The fin drive apparatus of claim 4, wherein,

the first moving assembly comprises a rack, a third gear and a third driving part, wherein the rack is arranged along the axial direction of the first shaft in the length direction, the rack is connected to the first shaft, the third gear is meshed with the rack, the third driving part is used for being connected to the ship body, and an output shaft of the third driving part is connected to the third gear so as to be used for driving the third gear to rotate.

6. The fin drive of claim 5, further comprising a second movable assembly and a movable mount, the movable mount for coupling to the fin via the second axis to rotate the fin about the second axis, the first end of the rotary assembly coupled to the movable mount, the movable mount coupled to the first bracket, the second movable assembly coupled to the movable mount for driving the movable mount to move in a height direction of the first bracket.

7. The fin drive of claim 6, wherein the second movement assembly comprises a hydraulic cylinder having a cylinder body connected to the first bracket, a piston shaft of the hydraulic cylinder being disposed along a height direction of the first bracket and connected to the movement seat.

8. The fin drive of claim 6, further comprising an upper stop, a lower stop, a horizontal stop, a rail, and a slider,

the length direction of the guide rail is parallel to the height direction of the first bracket, the guide rail is connected to the first bracket, the sliding block is connected to the movable seat, the sliding block is connected to the guide rail to guide the movement of the movable seat along the height direction of the first bracket,

the upper limiting piece and the lower limiting piece are both connected to the first bracket, the upper limiting piece is positioned above the lower limiting piece along the height direction of the first bracket, the movable seat is positioned between the upper limiting piece and the lower limiting piece,

the horizontal limiting piece is used for being arranged on the ship body, is located on the side of the first shaft along the axial direction of the first shaft, and is used for blocking the first shaft.

9. The fin drive of claim 5, wherein the first shaft is a sleeve structure that is sleeved on a support shaft of the vessel, and the third gear is configured to be connected to the support shaft.

10. A fin arrangement for a ship, the fin arrangement comprising:

a fin; and

a fin drive according to any one of claims 1 to 9.

11. A ship, characterized in that it comprises a fin arrangement according to claim 10.