Tiltable sail device

Abstract

The utility model belongs to the technical field of ocean engineering, and particularly relates to a toppling sail device which comprises a sail body, a common base and a driving assembly used for adjusting the inclination angle of the sail body, and the sail body is rotationally connected with the common base through a turnover supporting assembly; the sail body comprises a sail blade and a mast seat; a steel wire rope connecting piece is arranged on the back of the sail blade; the driving assembly comprises a pushing device used in the first rotating process of the sail body and a lifting mechanism used in the second rotating process of the sail body, and the pushing device is of a telescopic structure and abuts against the bottom face of the sail blade in the first rotating process; the lifting mechanism comprises a supporting rod and a winch, a steel wire rope is wound on a winding drum of the winch, one end of the steel wire rope extends out of the winch to be connected with a steel wire rope connecting piece, and the steel wire rope abuts against the top of the supporting rod to change the extending angle of the steel wire rope.

Description

Technical Field

[0001] The present invention relates to the field of marine engineering technology, and more particularly to a tiltable sail device. Background Art

[0002] As the international community's requirements for the green level of ships are increasing, countries around the world are actively developing various energy-saving and emission-reduction technologies. Among them, with the research and development of information technology and modern sail theory, sail-assisted propulsion, as the oldest energy-saving technology, has returned to the stage of green application in shipping. In recent years, Dalian Shipbuilding Industry has played an active leading and exemplary role in the research and development of sail-assisted propulsion devices and ship applications. With the help of the second phase of the sail project, the hard wing sail was demonstrated and applied on a very large VLCC tanker for the first time, filling the technical gap at home and abroad. In 2018, the sail-assisted "Kaili Lun" VLCC delivered by Dalian Shipbuilding Industry fully demonstrated the effectiveness of the wing-shaped hard sail in ship energy conservation and emission reduction, marking that my country has made a breakthrough in the promotion and application of ship sail resources. In 2019, Dalian Shipbuilding carried out engineering application research on the second phase of the sail, increasing the number of wing-shaped sails from a pair of sails equipped on the "Kaili Lun" to two pairs of sails equipped on the "Xin Yidun", and upgrading the sail blades from metal to non-metallic carbon fiber materials. After actual ship testing, the application effect of the sail-assisted propulsion of the second phase project was significant. After years of product research and development, Dalian Shipyard has found that how to improve the lightweight and intelligent operation of sailing devices, improve maintenance convenience and ship applicability has become the key direction of future research and development of sailing propulsion devices.

[0003] The rigid wing-shaped sail product adopts a mast and sail blade structure, and realizes automatic lifting and angle adjustment of the sail blade by setting a lifting system and a rotation system, so as to effectively utilize wind resources. During the lifting and lowering process of the rigid wing-shaped sail, the mast and sail blade must be upright, which makes it difficult to maintain the sail, and causes a series of problems such as limited driving vision and poor ship type applicability during ship layout and navigation. Summary of the invention

[0004] The present invention aims at a series of problems such as the mast and sail blades must be upright during the lifting process of the hard wing-shaped sail, which makes it difficult to maintain the sail, limits the driving vision for ship layout and navigation, and has poor applicability to the ship type. The present invention provides a tiltable sail device, wherein the sail blades and mast of the sail device adopt a fiberglass integrated molding structure to minimize the weight of the sail body and improve the overall strength; a common base is arranged at the bottom, and the common base accommodates the bottom rotating device to realize the rotation of the sail and the bottom support; with the support rod structure and the guide pulley arranged on the common base as the fulcrum, in conjunction with the wire rope winch and the pushing device, the attitude conversion of the sail body from the 0° tilting state and the 90° upright state is realized, the sail is upright at 90° in the wind-using state, and the sail is tilted at 0° in the wind-abandoning or maintenance state, so as to solve the problem of limited vision for sail maintenance and arrangement, and improve the applicability of the sail device to the ship type.

[0005] In order to achieve the above object, the present invention is implemented by the following technical solutions:

[0006] A tiltable sail device comprises a sail body, a common base and a driving assembly for adjusting the tilt angle of the sail body, wherein the sail body is rotatably connected to the common base via a flip support assembly, the flip support assembly and the driving assembly are arranged on the common base, and the driving assembly is arranged on the rear side of the sail body;

[0007] The sail body includes a sail blade and a mast seat, and a through hole is provided on the side of the mast seat; the flip support assembly is arranged on the top of the common base, and the flip support assembly includes a flip shaft and two support plates arranged parallel to each other, the body of the flip shaft is passed through the through hole, and the sides of the two support plates are provided with support holes, and the two ends of the flip shaft are inserted into the support holes and rotatably connected to the support holes; a wire rope connector is provided on the back of the sail blade;

[0008] The driving assembly includes a pushing device for the first rotation process of the sail body and a lifting mechanism for the second rotation process of the sail body, the pushing device is a telescopic structure, and the pushing device abuts against the bottom surface of the sail blade during the first rotation process; the lifting mechanism includes a support rod and a winch, a steel wire rope is wound on the drum of the winch, one end of the steel wire rope extends out of the winch and is connected to the steel wire rope connector; a guide pulley is provided on the top of the support rod, and the steel wire rope extending out of the winch abuts against the guide pulley, and the steel wire rope is perpendicular to the flip axis in the horizontal direction along the winch to the steel wire rope connector.

[0009] In certain embodiments of the present invention, at least one pushing device is provided. Preferably, the pushing devices are provided in two groups, evenly distributed on both sides of the rear portion of the mast seat. Furthermore, the lifting mechanism may be provided between the two pushing devices.

[0010] In certain embodiments of the present invention, at least one group of lifting mechanisms (e.g., one group or two groups) is provided, the number of wire rope connectors is the same as the lifting mechanisms, and the wire rope connectors are provided at the center of gravity of the sail or above the center of gravity. When the lifting mechanisms are provided as one group, the wire rope connectors are preferably provided on the center line of the sail body. When the lifting mechanisms are provided as multiple groups, the wire rope connectors are preferably evenly distributed at the same horizontal height of the sail body.

[0011] In certain embodiments of the present invention, the wire rope connector is provided with a fixing plate perpendicular to the sail body, and a small hole for connecting the wire rope is provided on the side of the fixing plate. Preferably, the wire rope connector is in the shape of a hanging ear.

[0012] According to the preferred embodiment, a third vertical limit surface is provided on the common base on the front side of the sail body, and a first vertical limit surface is provided on the lower front part of the mast seat. When the sail body is in the working position, the first vertical limit surface abuts against the third vertical limit surface, and the height of the third vertical limit surface is not higher than the height of the bottom cross-section of the support hole.

[0013] In certain embodiments of the present invention, the third vertical limit surface is the plate surface of the limit plate, a surface of the limit block, or a structure suitable for vertically abutting the mast seat. Preferably, the structure where the third vertical limit surface is located is fixed (for example, welded) on the common base. More preferably, the structure where the third vertical limit surface is located forms an integrated structure with the common base.

[0014] In a preferred embodiment, the upper back side of the mast seat has a second vertical limit surface, and the common base on the front side of the sail body is provided with a fourth vertical limit surface. When the sail body is in the working position, the second vertical limit surface abuts against the fourth vertical limit surface.

[0015] Under the preferred embodiment, the second vertical limiting surface is a curved surface bent toward the front of the mast seat, the lower part of the back of the mast seat is a spherical arc surface bent toward the through hole, a support groove is provided on the top of the common base, and the shape of the support groove is adapted to the shape of the lower part of the mast seat, the third vertical limiting surface is the vertical surface of the support groove on the front side of the mast seat, and the fourth vertical limiting surface is the surface of a vertical plate extending vertically upward from the vertical surface of the support groove on the rear side of the mast seat, and the vertical plate is adapted to the shape of the second vertical limiting surface.

[0016] In the preferred embodiment, an extension surface is provided at the lower front part of the mast base, and the first vertical limiting surface is the end surface of the extension surface. More preferably, the upper and lower front parts of the mast base are both planes, and the through hole is provided at the side of the extension surface near the top of the extension surface.

[0017] In a preferred embodiment, both ends of the vertical plate are integrally connected to the two support plates.

[0018] In a preferred embodiment, the top of the vertical board extends horizontally away from the sail body to the edge of the common base, bends vertically, is integrally connected to the common base, and forms an equipment room between the vertical board and the top of the common base. A top opening is provided on the top plate surface of the equipment room, and the drive assembly is arranged below the top opening.

[0019] According to the preferred embodiment, a pushing rail for limiting and guiding the sliding of the pushing device during the first rotation process of the sail body is provided on the bottom surface of the sail blade.

[0020] In a preferred embodiment, the sail body is an integrally formed structure, and the sail body is made of a non-metallic material. Preferably, the non-metallic material is a glass fiber material or a carbon fiber material.

[0021] In the preferred embodiment, the jacking device is a spiral jacking mechanism, a hydraulic cylinder jacking mechanism or an electric push rod jacking mechanism, and the support rod is a spiral jacking mechanism, a hydraulic cylinder jacking mechanism, an electric push rod jacking mechanism or a fixed support rod of a non-telescopic structure.

[0022] In a preferred embodiment, the support rod is arranged to be inclined toward the winch.

[0023] In a preferred embodiment, the support rod is tilted above the winch.

[0024] The beneficial effects of the present invention are:

[0025] 1. The blades and mast of the tiltable sail device of the present invention are made of non-metallic materials in an integrated structure to minimize the weight of the sail body, improve the overall strength, save the cost of the sail, and improve the convenience and feasibility of the flipping operation.

[0026] 2. The tiltable sail device of the present invention can realize the conversion of the sail body from the 0° tilted state to the 90° upright state. When the wind is used, the sail can be upright at 90°, and it has the function of using wind power for propulsion; when the wind is abandoned or maintained, the sail can be tilted at 0° to reduce the impact on the driving vision and ship layout. The tiltable operation of the sail solves the problem of limited vision for sail maintenance and layout, and improves the applicability of the sail device to the ship type.

[0027] 3. The technical solution of the present invention has a simple and compact structure, high safety, reliability and dependability, and the sail body and equipment are easy to maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a structural diagram of the sail in one piece according to the present invention;

[0029] Figure 2 It is the structural diagram of the public base of the sail;

[0030] Figure 3 It is a schematic diagram of the jacking device;

[0031] Figure 4 It is a diagram of the support rod knot and winch arrangement;

[0032] Figure 5 It is a wire rope connection scheme diagram;

[0033] Figure 6 This is a diagram of the operation process of the sail from 0° tilting to 90° upright;

[0034] Figure 7 It is a diagram of the operation process of the sail from a 90° upright state to a 0° tilted state.

[0035] in, Figure 1 1-1 is a side view of the sail shaft. Figure 1 1-2 is the side view of the sail; Figure 1 1-3 are the front views of the sail; Figure 1 1-4 are the top views of the sails;

[0036] Figure 2 2-1 is the side view of the common base axis. Figure 2 Figure 2-2 is a top view of the public base. Figure 2 2-3 is a side view of the common base;

[0037] Figure 3 3-1 is the layout diagram of the push device; Figure 3 3-2 is the layout diagram of the top push guide rail; Figure 3 3-3 sail 90° upright; Figure 3 3-4 is the state of the first dumping process of the sail; Figure 3 3-5 is the second state of the sail dumping process; Figure 3 3-6 is the sail 0° tilted state;

[0038] Figure 4 4-1 is a side view of the support rod structure and winch arrangement; Figure 4 4-2 is a top view of the support rod structure and winch arrangement (single winch); Figure 4 4-3 is a top view of the support rod structure and winch arrangement (double winch);

[0039] Figure 5 5-1 is the layout diagram of the wire rope connector; Figure 5 5-2 is an enlarged diagram of the front and side of the wire rope connector and the connection status;

[0040] Figure 6 6-1 is the sail 0° tilted state; Figure 6 6-2 is the first upright state of the sail; Figure 6 6-3 is the second upright state of the sail; Figure 66-4 is the sail 90° upright state;

[0041] Figure 7 7-1 is the sail 90° upright state; Figure 7 7-2 is the state of the first dumping process of the sail; Figure 7 7-3 is the state of the second sail dumping process; Figure 7 7-4 is the sail in 0° tilted state.

[0042] In the figure, 1-sail body; 2-common base; 3-drive assembly; 4-flip support assembly; 5-sail blade; 6-mast seat; 7-flip axis; 8-support plate; 9-support hole; 10-pushing device; 11-lifting mechanism; 12-support rod; 13-winch; 14-wire rope; 15-wire rope connector; 16-guide pulley; 17-third vertical limit surface; 18-first vertical limit surface; 19-second vertical limit surface; 20-fourth vertical limit surface; 21-support groove; 22-equipment room; 23-top opening; 24-pushing slide rail; 25-sail blade bottom support surface; A is connected to the wire rope connector; B represents the partial enlargement of the side of the wire rope connector; C represents the partial enlargement of the front of the wire rope connector; D represents the wind thrust direction. DETAILED DESCRIPTION

[0043] The sail of the present invention adopts an integrated structure to eliminate the traditional concept of mast and sail blades, and uses non-metallic materials to form the sail blades and mast into one piece, collectively referred to as a sail body. The non-metallic material used in the sail body is preferably glass fiber or carbon fiber material, which can greatly reduce the weight and cost of the sail body. The following will be further explained in conjunction with the embodiments and drawings.

[0044] like Figure 1 As shown, the sail is an integrated structure.

[0045] A mast seat 6 is provided at the bottom of the sail body 1, and a flip axis 7 is provided on the mast seat 6. The sail body 1 can realize a 0-90° posture flip operation around the flip axis; the mast seat 6 is provided with a first vertical limit surface 18 and a second vertical limit surface 19. When the sail body 1 realizes a 90° upright state (working position), the vertical limit of the mast seat 6 and the common base 2 is realized through the vertical limit surface. The mast seat 6 needs to ensure that the sail body 1 does not structurally interfere with the common base 2 during the 0-90° flipping process, and realizes limit constraint in the 90° upright state, so that the sail remains in an upright state. Preferably, the mast seat 6 is a hemispherical arc structure to improve the compactness of the base size; preferably, the first vertical limit surface 18 of the mast seat 6 is a plane; preferably, the second vertical limit surface 19 of the mast seat 6 is an arc surface. When the sail changes from a tilted position of 0° to an upright position of 90°, the flip axis 7 bears the weight and rotation function of the sail body 1; in the upright position of 90°, the sail body 1 is subjected to a horizontal forward thrust, at which time a bending moment will be generated around the flip axis 7, and the bending moment is mainly transmitted to the common base 2 by the first vertical limit surface 18 fitting with the limit surface of the common base 2, and the second vertical limit surface 19 plays an auxiliary force limiting role; in the upright position, the gravity of the sail body 1 is mainly transmitted to the common base 2 by the mast seat 6.

[0046] like Figure 2 Shown is the common base structure of the sail.

[0047] The common base 2 at the bottom contains a rotating mechanism to realize the rotation of the sail body 1 around the vertical axis, and the attitude of the sail is adjusted according to the wind direction angle to obtain the maximum windward force effect.

[0048] A mast support groove 21 is provided in the middle of the common base 2. The mast support groove 21 is preferably a curved structure to ensure that the sail body 1 does not structurally interfere with the support groove 21 of the common base 2 during the 0-90° flipping of the sail body. Grease is applied inside the mast support groove 21.

[0049] A flip shaft support assembly 4 and a support hole 9, an equipment room 22, a sail blade bottom support surface 25 and other structures are arranged above the common base 2. The flip shaft support hole 9 cooperates with the flip shaft 7 to realize the flipping operation and bear part of the gravity load of the sail body 1 during the flipping process of the sail body 0 to 90°; a top opening 23 is provided at the top of the equipment room 22 on the sail blade bottom support surface 25, for the equipment in the equipment room 22 and the wire rope 14 to pass through.

[0050] The mast support groove 21 at the bottom of the common base is provided with a third vertical limit surface 17, which is preferably a plane, so as to be in contact with the first vertical limit surface 18 of the bottom mast seat 6, thereby realizing the main force of the sail body under the thrust state in a 90° upright posture.

[0051] A fourth vertical limit surface 20 is arranged above the common base support hole 9 and between the sail blade bottom support surface 25. The limit surface is preferably a curved surface, which is fitted with the second vertical limit surface 19 of the bottom mast seat 6, thereby achieving auxiliary force when the sail body is in a 90° upright posture and subjected to thrust.

[0052] like Figure 3 The diagram shown is a schematic diagram of the jacking device.

[0053] like Figure 3 As shown in 3-1 and 3-2, a jacking device 10 is arranged in the equipment room 22 on the common base 2. The jacking device 10 can be a screw jacking mechanism, a hydraulic cylinder jacking mechanism, an electric push rod jacking mechanism, etc. The jacking device 10 is arranged on both sides of the equipment room 22 near the mast seat 6, preferably two sets, preferably, two jacking guide rails 24 are arranged on the bottom surface 5a of the sail blade and directly above the jacking device 10, so as to realize the guiding and limiting effect of the jacking device 10 in the process of pushing out the sail blade 5.

[0054] like Figure 3 As shown in 3-3, 3-4, 3-5, and 3-6, the operation process of the pushing device 10 under different flipping postures of the sail is shown.

[0055] When the sail starts to flip from the 90° upright state, the pushing device 10 pushes out to provide an initial flipping torque to flip the sail body 1 around the flip axis, thereby realizing the first half of the flipping of the sail body 1 (the first flipping process). Figure 3 As shown in 3-4. Figure 3 As shown in 3-5 and 3-6, after the sail body 1 realizes a large-angle flip around the flip axis 7, the pushing device 10 is automatically disengaged from the pushing guide rail 24 on the bottom surface 5a of the sail blade, and the sail body 1 is pulled by the wire rope 14 to realize a smooth flipping of the second half of the dumping (the second flipping process). At this time, the pushing device 10 can be retracted or maintained in the pushing state.

[0056] like Figure 4 The figure shows the support rod knot and winch arrangement.

[0057] Above the common base 2, near the fourth vertical limiting surface 20, the support rod 12 structure is arranged obliquely, such as Figure 4 4-1. The support rod 12 structure can be a variety of retractable mechanisms such as a screw lifting mechanism, a hydraulic cylinder lifting mechanism, an electric push rod lifting mechanism, or a fixed support rod non-retractable mechanism; a wire rope guide pulley 16 is arranged above the support rod 12 structure, and the wire rope guide pulley 16 can be adjusted in height through a retractable support rod to ensure that the wire rope 16 does not interfere with the common base 2 structure during the tilting process of the sail body 1.

[0058] like Figure 4As shown in 4-2 and 4-3, according to the size and weight of the sail body and the stress during the dumping process, one set of support rod 12 structures can be arranged and cooperate with one winch 13, or two sets of support rod 12 structures and two winches 13 can be arranged.

[0059] like Figure 5 The figure shows the wire rope connection scheme.

[0060] A wire rope connector 15 is embedded in the sail 1. Preferably, the wire rope connector 15 is arranged at the center of gravity of the sail and in the upward area, and is arranged along the vertical center line of the sail 1. Preferably, the wire rope connector 15 is in the form of a hanging ear structure. One end of the wire rope is connected to the wire rope connector 15, and is connected to the winch 13 through the guide pulley 16 at the top of the support rod 12 structure. The winch 13 controls the opening and closing posture of the sail by tightening and loosening the wire rope 14.

[0061] The working process of the present invention is as follows:

[0062] like Figure 6 The figure shows the operation process of the sail from 0° tilting to 90° upright state.

[0063] like Figure 6 As shown in 6-1, the sail is in a 0° tilted state. At this time, the support rod 12 structure extends the guide pulley 16 to the working position, the winch 13 is started, and the wire rope 14 is gradually retracted to pull the sail up from the 0° tilted state.

[0064] like Figure 6 As shown in 6-2, when the sail is pulled up to the first upright process state, the pushing device 10 is extended to the highest working position, ready to receive the sail body 1. The winch 13 continues to retract the wire rope 14 to realize the flipping and uprighting operation process of the sail body 1.

[0065] like Figure 6 As shown in 6-3, when the sail is pulled up to the second upright process state, the top of the pushing device 10 contacts the bottom surface 5a of the sail blade to push the guide rail 24, so that the sail body 1 can be received. At this time, the winch 13 continues to retract the wire rope 14, and the pushing device 10 is retracted synchronously. In this state, the uprighting of the sail mainly depends on the pulling force of the wire rope 14 of the winch 13, and the pushing device 10 plays an auxiliary supporting role. The two cooperate synchronously to ensure the safe and stable flipping of the sail body 1 at the end of the upright stroke.

[0066] like Figure 6 As shown in 6-4, the sail is in a 90° upright state, the jacking device 10 is fully retracted, and the winch 13 tightens the locking wire rope 14. At this time, under the thrust of the wind, the sail is mechanically limited to a 90° upright state by the limiting surface of the mast seat 6 at the bottom of the sail and the common base 7, and the winch 13 wire rope 14 plays an auxiliary tightening role.

[0067] like Figure 7 As shown in 7-1 and 7-2, when the sail changes from the 90° upright state to the dumping state, the pushing device 10 extends to the bottom surface 5a of the sail blade to push the guide rail 24, and the pushing device 10 continues to extend, and the winch 13 releases the wire rope 14 synchronously. In this state, the dumping of the sail mainly depends on the thrust of the pushing device 10, and the winch 13 and the wire rope 14 play an auxiliary tightening role. The two cooperate synchronously to achieve the safe and stable flipping of the sail body 1 in the early stage of dumping. When the sail is in the first dumping process state, the pushing device 10 is separated from the sail body 1, and the sail body 1 continues to flip under the action of gravity, and the winch 13 and the wire rope 14 achieve auxiliary tightening.

[0068] like Figure 7 As shown in 7-3, when the sail is in the second dumping process, the pushing device is completely separated from the sail body 1, and the sail body 1 continues to flip under the action of gravity, and the winch 13 wire rope 14 is auxiliary tightened. Figure 7 As shown in 7-4, the sail is flipped to a 0° tilted state, and the journey ends.

[0069] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A tiltable sail device, characterized in that: The sail body (1) comprises a sail body (1), a common base (2) and a driving assembly (3) for adjusting the tilt angle of the sail body (1); the sail body (1) is rotatably connected to the common base (2) via a flip support assembly (4); the flip support assembly (4) and the driving assembly (3) are arranged on the common base (2); and the driving assembly (3) is arranged on the rear side of the sail body (1); The sail body (1) comprises a sail blade (5) and a mast seat (6), and a through hole is provided on the side of the mast seat (6); the flip support assembly (4) is arranged on the top of the common base (2), and the flip support assembly (4) comprises a flip shaft (7) and two support plates (8) arranged parallel to each other, the body of the flip shaft (7) is inserted into the through hole, and the sides of the two support plates (8) are provided with support holes (9), and the two ends of the flip shaft (7) are inserted into the support holes (9) and are rotatably connected to the support holes (9); a wire rope connector (15) is provided on the back of the sail blade (5), and the wire rope connector (15) is in the shape of a hanging ear; The driving assembly (3) comprises a pushing device (10) for the first turning process of the sail body (1) and a lifting mechanism (11) for the second rotation process of the sail body (1), wherein the pushing device (10) is a telescopic structure, and the pushing device (10) abuts against the bottom surface (5a) of the sail blade (5) during the first turning process; the lifting mechanism (11) comprises a support rod (12) and a winch (13), a steel wire rope (14) is wound around the drum of the winch (13), one end of the steel wire rope (14) extends out of the winch (13) and is connected to the steel wire rope connector (15); a guide pulley (16) is provided at the top of the support rod (12), and the steel wire rope (14) extending out of the winch (13) abuts against the guide pulley (16), and the steel wire rope (14) is perpendicular to the turning axis (7) in the horizontal direction along the winch (13) to the steel wire rope connector (15).

2. The tiltable sail device according to claim 1, characterized in that: A third vertical limiting surface (17) is provided on the common base (2) at the front side of the sail body (1), and a first vertical limiting surface (18) is provided at the lower front side of the mast seat (6). When the sail body (1) is in the working position, the first vertical limiting surface (18) abuts against the third vertical limiting surface (17), and the height of the third vertical limiting surface (17) is not higher than the height of the bottom section of the support hole (9).

3. The tiltable sail device according to claim 2, characterized in that: The upper back side of the mast seat (6) is provided with a second vertical limiting surface (19), and the common base (2) on the front side of the sail body (1) is provided with a fourth vertical limiting surface (20). When the sail body (1) is in the working position, the second vertical limiting surface (19) abuts against the fourth vertical limiting surface (20).

4. The tiltable sail device according to claim 3, characterized in that: The second vertical limiting surface (19) is a curved surface bent toward the front of the mast seat (6); the lower back of the mast seat (6) is a spherical arc surface bent toward the through hole; a support groove (21) is provided at the top of the common base (2); the shape of the support groove (21) is adapted to the shape of the lower portion of the mast seat (6); the third vertical limiting surface (17) is the vertical surface of the support groove (21) on the front side of the mast seat (6); the fourth vertical limiting surface (20) is the surface of a vertical plate extending vertically upward from the vertical surface of the support groove (21) on the rear side of the mast seat (6); the vertical plate is adapted to the shape of the second vertical limiting surface (19).

5. The tiltable sail device according to claim 4, characterized in that: The two ends of the vertical plate are integrally connected to the two support plates (8).

6. The tiltable sail device according to claim 4, characterized in that: The top of the vertical board horizontally extends away from the sail body (1) to the edge of the common base (2), is vertically bent, and is integrally connected to the common base (2), and forms an equipment room (22) between the vertical board and the top of the common base (2). A top opening (23) is provided on the top plate surface of the equipment room (22), and the drive assembly (3) is arranged below the top opening (23).

7. The tiltable sail device according to claim 1, characterized in that: The bottom surface (5a) of the sail blade is provided with a pushing rail (24) for limiting and guiding the sliding of the pushing device (10) during the first turning process of the sail body (1).

8. The tiltable sail device according to claim 1, characterized in that: The sail body (1) is an integrally formed structure, and the sail body (1) is made of non-metallic material.

9. The tiltable sail device according to claim 1, characterized in that: The jacking device (10) is a screw jacking mechanism, a hydraulic cylinder jacking mechanism or an electric push rod jacking mechanism, and the support rod (12) is a screw jacking mechanism, a hydraulic cylinder jacking mechanism, an electric push rod jacking mechanism or a fixed support rod of a non-telescopic structure.

10. The tiltable sail device according to claim 1, characterized in that: The support rod (12) is arranged to be inclined toward the winch (13).

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