Sails and sailing equipment

Abstract

The present application provides a sail and navigation equipment, the sail comprising a support rod, a plurality of support frames sleeved on the support rod in parallel and at intervals, and a sail body sleeved on the support rod and wrapping the plurality of support frames, the cross-section of the sail body in a plane perpendicular to the center axis of the support rod being an airfoil cross-section; the sail body having a top surface from which one end of the support rod extends and a bottom surface from which the other end of the support rod extends, the top surface being parallel to the bottom surface, and the width of the sail body gradually increasing from the top surface toward the bottom surface. The orthographic projection of the sail body provided in the present application is a trapezoid, which can effectively reduce the point of force applied to the sail, thereby reducing the external force torque on the support rod, thereby increasing the structural strength of the support rod and preventing it from breaking due to excessive impact from waves or wind; by designing the cross-section of the sail body along the radial direction of the support rod to be an airfoil cross-section, the rationality of the force applied to the sail can be improved, the resistance of the navigation equipment can be reduced, and the support rod from breaking due to excessive force applied to the sail body can be avoided.

Description

Technical Field

[0001] The present application belongs to the field of ship technology, and more specifically, relates to a sail and navigation equipment using the sail. Background Art

[0002] Unmanned sailboats are currently a popular choice for ocean exploration equipment due to their small size, lack of energy constraints, and ability to operate over long periods and large areas. As the power source for unmanned sailboats, the sails directly determine their navigation and operational capabilities.

[0003] At present, when an unmanned sailboat encounters an emergency situation such as strong winds and waves, the sails, as the main force-bearing object, are easily broken by the impact of waves and sea breeze. The structural strength of the sails is low, which seriously affects the endurance and subsequent operations of the unmanned sailboat. Summary of the Invention

[0004] The purpose of the embodiments of the present application is to provide a sail and navigation equipment to solve the problem of low structural strength and easy breakage of sails in the related art.

[0005] To achieve the above objectives, the technical solutions adopted in the embodiments of the present application are:

[0006] On the one hand, a sail is provided, comprising a sail body, a plurality of support frames supporting the sail body, and a support rod supporting the plurality of support frames, wherein the plurality of support frames are arranged on the support rod in parallel and at intervals, the sail body wraps the plurality of support frames, and the cross-section of the sail body in the plane direction perpendicular to the central axis of the support rod is an airfoil cross-section; the sail body has a top surface for extending one end of the support rod and a bottom surface for extending the other end of the support rod, the top surface is parallel to the bottom surface, and the width of the sail body gradually increases from the top surface toward the bottom surface.

[0007] In one embodiment, a connecting line between the center of the largest inscribed circle in the top surface and the center of the largest inscribed circle in the bottom surface is inclined to the central axis of the support rod.

[0008] In one embodiment, the angle between the connecting line and the central axis of the support rod is in the range of 4°-6°.

[0009] In one embodiment, each of the support frames is provided with a first through hole for the support rod to pass through and a second through hole spaced apart from the first through hole.

[0010] In one embodiment, in each of the support frames: a distance between one end of the support frame and the center of the first through hole is smaller than a distance between the other end of the support frame and the center of the first through hole.

[0011] In one embodiment, the airfoil section is a symmetrical airfoil section.

[0012] On the other hand, a sailing device is provided, comprising a boat body and the above-mentioned sail; one end of the support rod away from the top surface of the sail body is rotatably mounted on the boat body.

[0013] In one embodiment, the ship body includes a frame body, a hydrofoil installed at the bottom of the frame body, and a connecting rod connecting the frame body and the hydrofoil; a third through hole is provided on the frame body for the support rod to extend into, one end of the connecting rod is connected to the frame body, and the other end of the connecting rod is connected to the hydrofoil.

[0014] In one embodiment, the ship body further comprises a stern rudder installed at the stern position of the ship frame body, and the ship frame body is provided with a receiving groove for receiving the stern rudder.

[0015] In one embodiment, the stern rudder includes a storage box detachably connected to the frame body, a rudder blade for adjusting the travel direction of the frame body, a rotating rod connected to the rudder blade, and a driving unit for driving the rotating rod to rotate; the end of the rotating rod away from the rudder blade extends into the storage box, the driving unit is installed in the storage box, and the driving unit is connected to the end of the rotating rod away from the rudder blade.

[0016] The above one or more technical solutions in the embodiments of the present application have at least one of the following technical effects:

[0017] (1) The top and bottom surfaces of the sail body provided in the present application are parallel, and the width of the sail body gradually increases from the top surface toward the bottom surface. The orthographic projection of the sail body is a trapezoid, which can effectively reduce the point of force applied to the sail, thereby reducing the external force moment of the support rod, thereby improving the structural strength of the support rod and preventing it from breaking due to excessive impact of waves or wind.

[0018] (2) By designing the cross section of the sail body in the plane direction perpendicular to the axis of the support pole into an airfoil cross section, the rationality of the force applied to the sail can be improved, the resistance of the navigation equipment can be reduced, and the support pole can be prevented from being broken due to excessive force on the sail body. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or exemplary technical descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0020] Figure 1A schematic diagram of the structure of a sail provided in an embodiment of the present application;

[0021] Figure 2 An exploded schematic diagram of a sail provided in an embodiment of the present application;

[0022] Figure 3 A schematic cross-sectional view of a sail provided in an embodiment of the present application;

[0023] Figure 4 A front view of the support frame provided in an embodiment of the present application;

[0024] Figure 5 A schematic diagram of the structure of the navigation equipment provided in an embodiment of the present application;

[0025] Figure 6 Schematic diagram of the decomposition of the navigation equipment provided in the embodiment of the present application Figure 1 ;

[0026] Figure 7 Schematic diagram of the decomposition of the navigation equipment provided in the embodiment of the present application Figure 2 ;

[0027] Figure 8 A schematic cross-sectional view of a navigation device provided in an embodiment of the present application;

[0028] Figure 9 for Figure 8 A magnified schematic diagram of point A in the middle;

[0029] Figure 10 A schematic structural diagram of the bottom portion of the gantry body provided in an embodiment of the present application;

[0030] Figure 11 A schematic structural diagram of a first locking ring provided in an embodiment of the present application;

[0031] Figure 12 A schematic structural diagram of a connecting rod provided in an embodiment of the present application;

[0032] Figure 13 A schematic structural diagram of a second lock ring provided in an embodiment of the present application;

[0033] Figure 14 A schematic diagram of the structure of the hydrofoil provided in an embodiment of the present application;

[0034] Figure 15 A schematic structural diagram of the clamping seat provided in an embodiment of the present application;

[0035] Figure 16 An exploded schematic diagram of a tail rudder provided in an embodiment of the present application;

[0036] Figure 17 A partial cross-sectional schematic diagram of a tail rudder provided in an embodiment of the present application;

[0037] Figure 18 A schematic structural diagram of the rotating rod provided in an embodiment of the present application.

[0038] Among them, the main marks of the drawings in the figure are:

[0039] 1-sail; 11-support pole; 12-support frame; 120-first through hole; 121-second through hole; 122-first piece; 123-second piece; 13-sail body; 131-top surface; 132-bottom surface; 14-connecting line;

[0040] 2 - hull body; 21 - hull frame body; 210 - third through hole; 211 - first locking ring; 2110 - first through hole; 2111 - first internal thread; 2112 - positioning hole; 212 - first wire hole; 213 - driven gear; 214 - power unit; 215 - driving gear; 216 - receiving groove; 2161 - second screw hole; 2162 - fourth wire hole;

[0041] 22 - hydrofoil; 220 - fourth through hole; 221 - second locking ring; 2210 - second through hole; 2211 - second internal thread; 2212 - blind hole; 222 - opening; 223 - clamping seat; 2231 - first groove; 2232 - mounting hole; 2233 - first slot; 224 - second wire hole;

[0042] 23-connecting rod; 231-first external thread; 232-second external thread;

[0043] 24-tail rudder; 241-storage box; 2410-window; 2411-box; 2412-cover; 2413-clip; 2414-second slot; 2415-first screw hole; 2416-third cable hole;

[0044] 242-rudder blade; 2420-fifth through hole;

[0045] 243 - rotating rod; 2431 - third external thread; 2432 - second groove; 2433 - bushing; 2434 - hexagonal shaft;

[0046] 245-drive unit; 2451-output shaft;

[0047] 246-swing seat; 2460-opening; 2461-grip;

[0048] 247-Transmission gear. DETAILED DESCRIPTION

[0049] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0050] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0051] In addition, the terms "first", "second", "third", "fourth", and "fifth" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, a feature defined as "first", "second", "third", "fourth", and "fifth" may explicitly or implicitly include one or more of the features. In the description of this application, "multiple" means two or more, unless otherwise clearly and specifically defined. "Several" means one or more, unless otherwise clearly and specifically defined.

[0052] In the description of this application, it should be understood that the terms "center", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0053] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0054] Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, when the phrases "in one embodiment" or "in some embodiments" appear in various places throughout this specification, not all references are to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0055] See also Figures 1 to 3 The sail 1 provided in an embodiment of the present application will now be described. The sail 1 comprises a support pole 11, a plurality of support frames 12 spaced parallel to and sleeved on the support pole 11, and a sail body 13 sleeved on the support pole 11 and enclosing the plurality of support frames 12. The sail body 13 has an airfoil-shaped cross-section in a plane perpendicular to the central axis of the support pole 11. The sail body 13 has a top surface 131, from which one end of the support pole 11 extends, and a bottom surface 132, from which the other end of the support pole 11 extends. The top surface 131 is parallel to the bottom surface 132, and the width of the sail body 13 gradually increases from the top surface 131 toward the bottom surface 132. In this structure, the top surface 131 and bottom surface 132 of the sail body 13 provided by this application are parallel, and the width of the sail body 13 gradually increases from the top surface 131 toward the bottom surface 132. The orthographic projection of the sail body 13 can be a trapezoid, which can effectively reduce the point of force applied to the sail 1, thereby reducing the external force torque on the support rod 11, thereby improving the structural strength of the support rod 11 and preventing breakage due to excessive impact from waves or wind. By designing the cross-section of the sail body 13 along the radial direction of the support rod 11 as an airfoil cross-section, the rationality of the force applied to the sail 1 can be improved, the resistance of the navigation equipment can be reduced, and the support rod 11 can be prevented from being broken due to excessive force applied to the sail body 13.

[0056] In one embodiment, the chord length of the top surface 131 of the sail body 13 provided herein may be 450 mm, and the maximum thickness may be 100 mm; the chord length of the bottom surface 132 of the sail body 13 may be 700 mm, and the maximum thickness may be 130 mm; and the span of the sail body 13 may be 1500 mm. It should be noted that the front end of the airfoil cross section is smooth, and the rear end is pointed. The point at this pointed angle is called the trailing edge, the point on the airfoil cross section farthest from the trailing edge is called the leading edge, and the straight line connecting the leading and trailing edges is called the chord, and its length is called the chord length. A series of inscribed circles tangent to the upper and lower airfoil surfaces are drawn within the airfoil cross section. The line connecting the centers of the multiple inscribed circles is called the mid-camber line, and the diameter of the largest inscribed circle is called the thickness. The span of the sail body 13 is the straight-line distance between the top surface 131 and the bottom surface 132.

[0057] In one embodiment, see Figure 3In one embodiment of the sail 1 provided in this application, a connecting line 14 between the center of the maximum inscribed circle within the top surface 131 and the center of the maximum inscribed circle within the bottom surface 132 is inclined relative to the central axis of the support rod 11. Specifically, the center of the maximum inscribed circle of each airfoil-shaped cross section on the sail body 13 lies on connecting line 14. This structure ensures that the point of action of the resultant force on each airfoil-shaped cross section on the sail body 13 lies on the support rod 11, thereby improving the rationality of the force applied to the support rod 11 and effectively preventing breakage of the support rod 11.

[0058] In one embodiment, see Figure 3 As a specific embodiment of the sail 1 provided in the present application, the angle between the connecting line 14 and the central axis of the support pole 11 is in the range of 4°-6°. Within this angle range, the support pole 11 is subjected to reasonable force, has a high degree of resistance to waves and wind, and has a high structural strength and is not prone to breakage. The angle between the connecting line 14 and the central axis of the support pole 11 can be 4°, 5°, or 6°, etc., and is not limited to this.

[0059] In one embodiment, see Figure 2 and Figure 4 As a specific embodiment of the sail 1 provided in an embodiment of the present application, each support frame 12 is provided with a first through-hole 120 for the support rod 11 to pass through, and a second through-hole 121 spaced apart from the first through-hole 120. With this structure, each first through-hole 120 allows the support rod 11 to pass through, thereby facilitating the installation of the support frames 12 and the support rod 11. The second through-hole 121 reduces the material usage of each support frame 12, lowering the weight of each support frame 12 and, consequently, the overall weight of the sailing equipment.

[0060] In one embodiment, see Figure 4 Each support frame 12 has a sheet-like structure, and its cross-section can be adapted to the aerofoil cross-section of the sail body 13, thereby supporting the sail body 13 and preventing deformation of the sail body 13 under stress. Multiple support frames 12 are arranged in parallel and spaced apart on the support pole 11, with the distance between adjacent support frames 12 being equal. This improves the support reliability of the sail body 13 and increases the uniformity of the force applied to the support pole 11.

[0061] In one embodiment, see Figure 4As a specific embodiment of the sail 1 provided in an embodiment of the present application, in each support frame 12, a first through hole 120 separates the support frame 12 into a first piece 122 and a second piece 123, wherein the length of the first piece 122 is less than that of the second piece 123; and a second through hole 121 is defined in the second piece 123. With this structure, the first piece 122 of each support frame 12 serves as the primary load-bearing plate. The first piece 122 is a solid plate, effectively improving impact resistance. The second piece 123 serves as the supporting plate, and the second through hole 121 is defined in the second piece 123, effectively reducing weight. The length of the first piece 122 can be the distance L1 between one end of the support frame 12 and the center of the first through hole 120, while the length of the second piece 123 can be the distance L2 between the other end of the support frame 12 and the center of the first through hole 120. With L2 being greater than L1, the sail body 13 exhibits a better flow-guiding effect.

[0062] In one embodiment, each support frame 12 can be made of carbon fiber, which has high mechanical strength and is lightweight. The area of the sail body 13 that wraps around the first piece 122 of the support frame 12 can be made of a composite material, and the area of the sail body 13 that wraps around the second piece 123 of the support frame 12 can be made of a lightweight material, such as aluminum, thereby effectively reducing the weight of the entire sailing equipment.

[0063] In one embodiment, see Figure 4 As a specific embodiment of the sail 1 provided in the present application, the airfoil cross-section is a symmetrical airfoil cross-section. In this structure, the mid-camber line of the airfoil cross-section coincides with the chord, thereby ensuring consistent flow guidance on both sides of the sail body 13 and improving the stability of the navigation equipment.

[0064] A comparative analysis of the sail 1 provided in the embodiment of the present application and a rectangular sail of the same area was conducted. The torque generated by the geometric center of the sail 1 of the present application at the base of the support pole 11 was 92.8% of that of the rectangular sail. This means that, while generating the same amount of propulsive lift with a sail of the same area, the sail 1 of the present application requires at least 7.2% less structural strength for the support pole 11. This means that, given the same area and lift, the sail 1 of the present application can withstand greater impact forces, particularly when the navigation equipment tilts.

[0065] The present application also conducted tests on the sail 1 to test the lift and drag generated by the sail 1 at different wind speeds and windward angles, as shown in the following table.

[0066]

[0067] As can be seen from the table above, when the wind speed is constant, lift first increases and then decreases with the increase of angle of attack, while drag gradually increases with the increase of angle of attack. When the angle of attack is constant, both lift and drag gradually increase with the increase of wind speed.

[0068] See also Figure 5 The present application also provides a sailing device comprising a hull 2 and the aforementioned sail 1. A support rod 11 is pivotally mounted on the hull 2 at one end thereof, distal from the top surface 131 of the sail body 13. This structure allows the rotation of the support rod 11 on the hull 2 to adjust the windward angle of the sail 1, thereby adjusting the direction and magnitude of the sailing device's power.

[0069] In one embodiment, see Figure 7 、 Figure 9 and Figure 10 As a specific embodiment of the navigation equipment provided in the present application, the boat body 2 includes a gantry 21, a hydrofoil 22 mounted on the bottom of the gantry 21, and a connecting rod 23 connecting the gantry 21 and the hydrofoil 22. The gantry 21 has a third through-hole 210 for the support rod 11 to extend through. One end of the connecting rod 23 is connected to the gantry 21, and the other end is connected to the hydrofoil 22. This structure, through the hydrofoil 22, reduces the fluid resistance of the navigation equipment and provides a certain amount of lift for the navigation equipment. The connecting rod 23 connects the hydrofoil 22 to the gantry 21, facilitating quick assembly and disassembly of the hydrofoil 22 from the gantry 21, improving efficiency and facilitating maintenance.

[0070] In one embodiment, see Figure 9 、 Figure 12 and Figure 13 A first locking ring 211 supporting the support rod 11 is installed in the third through hole 210, and a first through hole 2110 coaxially arranged with the third through hole 210 is provided on the first locking ring 211; a fourth through hole 220 for one end of the connecting rod 23 to extend into is provided on the hydrofoil 22, and a second locking ring 221 is installed in the fourth through hole 220, and a second through hole 2210 coaxially arranged with the fourth through hole 220 is provided on the second locking ring 221; a first internal thread 2111 is provided on the inner circumference of the first through hole 2110, and a second internal thread 2211 is provided on the inner circumference of the second through hole 2210; a first external thread 231 connected to the first internal thread 2111 is provided on the outer circumference of one end of the connecting rod 23, and a second external thread 232 connected to the second internal thread 2211 is provided on the outer circumference of the other end of the connecting rod 23. With this structure, both ends of the connecting rod 23 can be threadedly connected to the first locking ring 211 and the second locking ring 221 respectively, which can facilitate quick disassembly and assembly between the connecting rod 23 and the hydrofoil 22 and the frame body 21 respectively.

[0071] In one embodiment, see Figure 11 The first locking ring 211 is provided with a plurality of positioning holes 2112 in a ring array to facilitate assembly and disassembly between the first locking ring 211 and the frame body 21. The central axis of each positioning hole 2112 can be parallel to the central axis of the first through hole 2110.

[0072] In one embodiment, see Figure 14 and Figure 15 The two opposite side walls of the hydrofoil 22 are each provided with an opening 222 through which the two ends of the second locking ring 221 extend. This structure allows the two openings 222 to clamp the second locking ring 221, allowing the second locking ring 221 to rotate within the two openings 222, making it easier for the operator to rotate the second locking ring 221 and thereby achieve assembly and disassembly with the connecting rod 23, making the operation convenient.

[0073] In one embodiment, see Figure 13 The outer surface of the second lock ring 221 is provided with a plurality of blind holes 2212 in an annular array. In this structure, the blind holes 2212 can be inserted into external tools to facilitate the rotation of the second lock ring 221, thereby improving the disassembly efficiency between the second lock ring 221 and the connecting rod 23.

[0074] In one embodiment, see Figure 14 and Figure 15 The hydrofoil 22 includes two clamping seats 223 for clamping the connecting rod 23. Each clamping seat 223 defines a first groove 2231 that communicates with the corresponding opening 222. The two first grooves 2231 enclose the second through-hole 121. With this structure, when the connecting rod 23 is threadedly connected to the first locking ring 211 via the first external thread 231, the two clamping seats 223 merge to clamp the connecting rod 23. The second locking ring 221 is positioned in the two openings 222. By rotating the second locking ring 221, it is connected and secured to the second external thread 232 on the connecting rod 23, thereby enabling quick assembly and disassembly of the connecting rod 23 and the hydrofoil 22.

[0075] In one embodiment, see Figure 15 , a plurality of mounting holes 2232 are correspondingly provided on the two clamping seats 223. In this structure, fasteners such as bolts and screws can be installed in the plurality of mounting holes 2232 to achieve a detachable connection between the two clamping seats 223.

[0076] In one embodiment, see Figure 10 and Figure 14 The bottom of the gantry body 21 is provided with a first wire hole 212, and the hydrofoil 22 is provided with a corresponding second wire hole 224 that is connected to the first wire hole 212. This structure connects the gantry body 21 and the hydrofoil 22 through the first wire hole 212 and the second wire hole 224, making it easier for the wire to pass through. Figure 15 The two clamping seats 223 are respectively provided with a first clamping groove 2233, and the two first clamping grooves 2233 are combined to form a second wire hole 224, which is convenient for clamping the wire.

[0077] In one embodiment, see Figure 7 and Figure 8 A driven gear 213 is fixedly mounted on the support rod 11, and a power unit 214 and a driving gear 215 connected to the power unit 214 are installed on the frame body 21. The driving gear 215 is engaged with the driven gear 213. The power unit 214 can be a motor. This structure drives the support rod 11 to rotate through the power unit 214, the driving gear 215 and the driven gear 213, thereby adjusting the windward angle of the sail 1. The gear adjustment accuracy is high. The diameter of the driving gear 215 is smaller than that of the driven gear 213, that is, the large gear is driven by the small gear. The transmission efficiency of the power unit 214 is high and it saves labor, which facilitates the adjustment of the windward angle of the sail 1 when the wind is strong.

[0078] In one embodiment, see Figure 5 As a specific embodiment of the navigation equipment provided in this embodiment, the boat body 2 also includes a stern rudder 24 mounted at the stern of the gantry body 21. The gantry body 21 is provided with a receiving slot 216 for accommodating the stern rudder 24. This structure allows for rapid positioning and removal of the stern rudder 24 and protects the stern rudder 24 from impact by external objects.

[0079] In one embodiment, see Figure 16 As a specific embodiment of the navigation equipment provided in an embodiment of the present application, the stern rudder 24 includes a storage box 241 detachably connected to the gantry body 21, a rudder blade 242 for adjusting the travel direction of the gantry body 21, a rotating rod 243 connected to the rudder blade 242, and a drive unit 245 for rotating the rotating rod 243. The end of the rotating rod 243 away from the rudder blade 242 extends into the storage box 241, and the drive unit 245 is installed in the storage box 241 and connected to the end of the rotating rod 243 away from the rudder blade 242. The drive unit 245 can be a motor. This structure integrates the drive unit 245, the rotating rod 243, the rudder blade 242, and the storage box 241 into a single body, forming the stern rudder 24 for adjusting the travel direction of the gantry body 21. Since the storage box 241 is detachably connected to the frame body 21, when the stern rudder 24 needs maintenance due to watertight failure or damage due to external impact, the stern rudder 24 can be directly removed from the frame body 21, which facilitates the maintenance and replacement of the drive unit 245, the rotating rod 243, the rudder blade 242, etc., and the operation is convenient and quick.

[0080] In one embodiment, see Figure 16The tail rudder 24 also includes a swing seat 246 that is sleeved and fixed on the rotating rod 243, and a transmission gear 247 connected to the drive unit 245. The outer circumference of the swing seat 246 is provided with a latching tooth 2461 that engages with the transmission gear 247. The swing seat 246 is located in the storage box 241. Specifically, the transmission gear 247 is sleeved and fixed on the output shaft 2451 of the drive unit 245, and the center of the swing seat 246 is sleeved and fixed on the rotating rod 243. This structure drives the rotating rod 243 to rotate through the transmission gear 247 and the swing seat 246, thereby improving the reliability of the rotation of the rotating rod 243.

[0081] In one embodiment, see Figure 16 The central axis of the output shaft 2451 is arranged parallel to the central axis of the rotating rod 243 and spaced apart from each other, ensuring consistent rotation of the output shaft 2451 and the rotating rod 243. In another embodiment, the central axis of the output shaft 2451 and the central axis of the rotating rod 243 can be arranged perpendicularly, with the central axis of the output shaft 2451 located in the plane of the swing seat 246. The transmission gear 247 can be a curved gear to facilitate installation of the drive unit 245 and reduce its size.

[0082] In one embodiment, see Figure 16 The swing seat 246 is fan-shaped. This structure can reduce the volume and manufacturing cost of the swing seat 246 because the navigation device can achieve a large angle change in the navigation direction of the navigation device by swinging the rudder blade 242 slightly during the navigation process.

[0083] In some embodiments, baffles may be provided at both ends of the swing seat 246 to prevent the swing seat 246 from being separated from the transmission gear 247 due to excessive rotation angle.

[0084] In one embodiment, see Figure 16 The angular range of the swinging seat 246 is 60°-120°. In this structure, the swinging seats 246 are symmetrically arranged around the connecting line 14 between the output shaft 2451 and the rotating rod 243. The swinging seat 246 can swing left and right within an angular range of 30°-60°, sufficient to adjust the direction of travel of the navigation device. The angular range of the swinging seat 246 can be 60°, 70°, 80°, 90°, 100°, 110°, or 120°, etc., and is not limited to this.

[0085] In one embodiment, see Figure 18 A third external thread 2431 is provided on the outer peripheral surface of the end of the rotating rod 243 away from the rudder blade 242. In this structure, the third external thread 2431 can be matched with an external screw to lock and fix the swing seat 246, thereby preventing the swing seat 246 from being separated from the rotating rod 243.

[0086] In one embodiment, see Figure 16 and Figure 18 The middle portion of the rotating rod 243 is a hexagonal shaft portion 2434, and the swing seat 246 is provided with an opening 2460 for the rotating rod 243 to extend into. The opening 2460 can be a hexagonal hole that is compatible with the hexagonal shaft portion 2434. This structure can achieve a locking between the swing seat 246 and the rotating rod 243, preventing the swing seat 246 and the rotating rod 243 from slipping.

[0087] In one embodiment, see Figure 17 and Figure 18 The rudder blade 242 has a fifth through-hole 2420 along its length, into which the rotating rod 243 extends. A protrusion (not shown) is mounted on the inner circumference of the fifth through-hole 2420 along the length of the rudder blade 242. Correspondingly, the rotating rod 243 has a second groove 2432 into which the protrusion extends. This structure, with the protrusion extending into the second groove 2432, secures the rotating rod 243 to the rudder blade 242, preventing relative rotation between the rotating rod 243 and the rudder blade 242 and improving the reliability of the rudder blade 242's swinging motion.

[0088] In one embodiment, see Figure 18 A sleeve 2433 is fixedly mounted on the middle portion of the rotating rod 243, and the sleeve 2433 is disposed on the outside of the storage box 241. The sleeve 2433 reduces friction and wear between the rotating rod 243 and the storage box 241, thereby protecting the rotating rod 243. It also seals the hole in the storage box 241 through which the rotating rod 243 extends, thereby providing a certain degree of waterproofing.

[0089] In one embodiment, see Figure 16 The storage box 241 includes a box body 2411 with a window 2410 on the top and a cover 2412 covering the box body 2411. The cover 2412 is detachably connected to the box body 2411. This structure allows for easy maintenance and replacement of components in the storage box 241, making the operation quick and easy.

[0090] In one embodiment, see Figure 16 A latching protrusion 2413 is mounted on the inner circumference of the window 2410, and a corresponding second latching slot 2414 is formed on the cover 2412 for the latching protrusion 2413 to extend into. This structure, through the tight fit between the latching protrusion 2413 and the second latching slot 2414, enables quick assembly and disassembly between the cover 2412 and the box body 2411. In some embodiments, the storage box 241 further includes a sealing ring that seals the gap between the box body 2411 and the cover 2412, thereby improving the sealing performance of the storage box 241.

[0091] In one embodiment, see Figure 6 and Figure 16 A plurality of first screw holes 2415 are spaced apart on the storage box 241, and second screw holes 2161 are provided on the bottom surface of the accommodating groove 216 corresponding to the positions of the first screw holes 2415. The storage box 241 and the frame body 21 can be fixed by screws.

[0092] In one embodiment, see Figure 6 and Figure 16 A third wire hole 2416 is defined on the side of the storage box 241 facing the gantry body 21, and a fourth wire hole 2162 is defined on the bottom of the receiving groove 216, communicating with the third wire hole 2416. This structure connects the gantry body 21 with the storage box 241 through the third wire hole 2416 and the fourth wire hole 2162, facilitating the passage of wires.

[0093] The above description is merely an optional embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A sail (1), characterized in that: The sail body (13) comprises a sail body (13), a plurality of support frames (12) supporting the sail body (13), and a support rod (11) supporting the plurality of support frames (12), wherein the plurality of support frames (12) are arranged on the support rod (11) in parallel and at intervals, the sail body (13) wraps the plurality of support frames (12), and the cross section of the sail body (13) in the plane direction perpendicular to the central axis of the support rod (11) is an airfoil cross section; the sail body (13) has a top surface (131) for one end of the support rod (11) to extend out, and a bottom surface (132) for the other end of the support rod (11) to extend out, the top surface (131) is parallel to the bottom surface (132), and the width of the sail body (13) gradually increases from the top surface (131) toward the bottom surface (132); A connecting line (14) between the center of the maximum inscribed circle in the top surface (131) and the center of the maximum inscribed circle in the bottom surface (132) is inclined to the central axis of the support rod (11); wherein the center of the maximum inscribed circle on each airfoil section on the sail body (13) is located on the connecting line (14).

2. The sail (1) according to claim 1, characterized in that: The angle between the connecting line (14) and the central axis of the support rod (11) ranges from 4° to 6°.

3. The sail (1) according to claim 1, characterized in that: Each of the support frames (12) is provided with a first through hole (120) for the support rod (11) to pass through, and a second through hole (121) spaced apart from the first through hole (120).

4. The sail (1) according to claim 3, characterized in that In each of the support frames (12), the distance between one end of the support frame (12) and the center of the first through hole (120) is smaller than the distance between the other end of the support frame (12) and the center of the first through hole (120).

5. The sail (1) according to any one of claims 1 to 4, characterized in that: The aerofoil cross section is a symmetrical aerofoil cross section.

6. Navigation equipment, characterized by: It comprises a boat body (2) and a sail (1) as claimed in any one of claims 1 to 5; the end of the support rod (11) away from the top surface (131) of the sail body (13) is rotatably mounted on the boat body (2).

7. The navigation device according to claim 6, characterized in that: The ship body (2) includes a frame body (21), a hydrofoil (22) installed at the bottom of the frame body (21), and a connecting rod (23) connecting the frame body (21) and the hydrofoil (22); the frame body (21) is provided with a third through hole (210) for the support rod (11) to extend into, one end of the connecting rod (23) is connected to the frame body (21), and the other end of the connecting rod (23) is connected to the hydrofoil (22).

8. The navigation device according to claim 7, characterized in that: The ship body (2) further comprises a stern rudder (24) installed at the stern position of the ship frame body (21), and the ship frame body (21) is provided with a receiving groove (216) for receiving the stern rudder (24).

9. The navigation device according to claim 8, characterized in that: The stern rudder (24) includes a storage box (241) detachably connected to the frame body (21), a rudder blade (242) for adjusting the travel direction of the frame body (21), a rotating rod (243) connected to the rudder blade (242), and a driving unit (245) for driving the rotating rod (243) to rotate; one end of the rotating rod (243) away from the rudder blade (242) extends into the storage box (241), the driving unit (245) is installed in the storage box (241), and the driving unit (245) is connected to the end of the rotating rod (243) away from the rudder blade (242).

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