Telescopic sail device

Abstract

The invention provides a telescopic sail device. The telescopic sail device comprises a central telescopic mast, a telescopic sail airfoil and a rope driving assembly. The central telescopic mast is formed by cascading and nesting multiple stages of hollow rectangular cylinders, and axial stretching movement can be achieved. The telescopic sail airfoil is formed by cascading and nesting a plurality of curved-surface-shaped sails, and each stage of sail is fixedly connected with the corresponding hollow rectangular cylinder and extends in the axial direction along with the hollow rectangular cylinder. The rope driving assembly is mainly composed of a winding reel, a rope and a pulley, reciprocating arrangement of the rope between the rectangular barrels is achieved through the pulley, and the rope is wound on the winding reel to drive the whole sail device to stretch in the axial direction. When the whole sail device is completely unfolded, the axial length is large, and a large windward side can be obtained; during complete folding, the central mast and the sail airfoil are compactly folded, the windward area is small, and the folding size is small. In addition, the single-stage rectangular cylinders and the corresponding sail airfoils can serve as module units to be axially expanded, and the sail device with the larger axial length and the larger windward area can be obtained.

Description

Technical Field

[0001] The invention belongs to the field of mechanical technology, and in particular relates to a telescopic sail device. Background Art

[0002] Existing ship structures cannot meet the higher requirements for fuel consumption and carbon emissions during ship navigation. Ship navigation often relies entirely on fossil fuels and is unable to cope with the challenges brought about by climate change during ship navigation. Summary of the invention

[0003] The object of the present invention is to provide a retractable sail device.

[0004] In order to solve the above problems, the present invention provides a retractable sail device, comprising:

[0005] It includes: a central telescopic mast, a telescopic sail wing and a rope drive assembly, wherein:

[0006] The central telescopic mast comprises: a primary mast 1, a secondary mast 2, a tertiary mast 3 and a quaternary mast 4; when the central telescopic mast is folded, the primary mast 1, the secondary mast 2, the tertiary mast 3 and the quaternary mast 4 are connected in sequence from outside to inside;

[0007] The telescopic sail wing surface comprises: a first-level sail 501, a second-level sail 502, a third-level sail 503 and a fourth-level sail 504, each of which is a hollow structure. The sizes of the first-level sail and the fourth-level sail increase proportionally. The first-level mast 1 is inserted and fixed in the hollow structure of the first-level sail 501, the second-level mast 2 is inserted and fixed in the hollow structure of the second-level sail 502, the third-level mast 3 is inserted and fixed in the hollow structure of the third-level sail 503, and the fourth-level mast 4 is inserted and fixed in the hollow structure of the fourth-level sail 504. When the telescopic sail wing surface is folded, the fourth-level sail 504, the third-level sail 503, the second-level sail 502 and the first-level sail 501 are sequentially mounted from the outside to the inside.

[0008] The rope drive assembly is respectively connected to the primary mast 1, the secondary mast 2, the tertiary mast 3 and the quaternary mast 4 to drive the primary mast 1, the secondary mast 2, the tertiary mast 3 and the quaternary mast 4 to extend or retract, thereby driving the primary sail 501, the secondary sail 502, the tertiary sail 503 and the quaternary sail 504 to extend or retract.

[0009] Furthermore, in the above device, the primary mast 1 comprises: a primary rectangular tube 101, a primary locking assembly 103, a primary first upper pulley 104, a primary second upper pulley 105, a primary first lower pulley 106 and a primary second lower pulley 107.

[0010] The first-level rectangular tube 101 is a hollow rectangular tube, and the bottom of the first-level rectangular tube 101 is fixedly connected to the base;

[0011] The primary locking assembly 103 is fixedly mounted on the left side of the primary rectangular tube 101 near the top, and the circular lock tongue of the primary locking assembly 103 passes through the wall of the primary rectangular tube 101 along the radial direction of the primary rectangular tube 101, and extends into the primary rectangular tube 101 to be inserted into the secondary upper lock hole 208 or the secondary lower lock hole 209 on the secondary rectangular tube 201 located inside the primary rectangular tube 101; when the device is fully unfolded and folded, the circular lock tongue of the primary locking assembly 103 is in an extended state, inserted into the secondary lower lock hole 209 or the secondary upper lock hole 208; during the unfolding process of the device, the circular lock tongue of the primary locking assembly 103 is in a retracted state;

[0012] The first upper pulley 104 and the second upper pulley 105 are respectively fixedly mounted on the front and rear edges of the top of the first rectangular tube 101;

[0013] The first lower pulley 106 and the second lower pulley 107 are respectively fixedly mounted on the inner sides of the front and rear walls of the first rectangular tube 101 and close to the bottom.

[0014] Further, in the above device, the secondary mast 2 comprises: a secondary rectangular tube 201, a secondary locking assembly 203, a secondary first upper pulley 204, a secondary second upper pulley 205, a secondary first lower pulley 206, a secondary second lower pulley 207, a secondary upper locking hole 208 and a secondary lower locking hole 209;

[0015] The secondary rectangular tube 201 is a hollow rectangular tube, and the dimensions of each side are smaller than those of the primary rectangular tube 101. The secondary rectangular tube 201 is located inside the primary rectangular tube 101.

[0016] The circular lock tongue of the secondary locking assembly 203 passes through the wall of the secondary rectangular tube 201 along the radial direction of the secondary rectangular tube 201, and extends into the secondary rectangular tube 201 to be inserted into the third-level upper lock hole 308 or the third-level lower lock hole 309 on the third-level rectangular tube 301 located in the secondary rectangular tube 201; when the device is fully unfolded and folded, the circular lock tongue in the secondary locking assembly 203 is in an extended state, inserted into the third-level lower lock hole 309 or the third-level upper lock hole 308 on the third-level rectangular tube 301; during the unfolding process of the device, the circular lock tongue of the secondary locking assembly 203 is in a retracted state;

[0017] The secondary first upper pulley 204 and the secondary second upper pulley 205 are respectively fixedly mounted on the front and rear edges of the top of the secondary rectangular tube 201;

[0018] The second-stage first lower pulley 206 and the second-stage second lower pulley 207 are respectively fixedly mounted on the front and rear sides of the bottom of the second-stage rectangular tube 201;

[0019] The secondary upper locking hole 208 and the secondary lower locking hole 209 are fixedly installed at the top and bottom positions of the left wall side of the secondary rectangular tube 201 respectively.

[0020] Furthermore, in the above device, the three-stage mast 3 includes: a three-stage rectangular tube 301, a three-stage locking assembly 303, a three-stage first upper pulley 304, a three-stage second upper pulley 305, a three-stage first lower pulley 306, a three-stage second lower pulley 307, a three-stage upper locking hole 308 and a three-stage lower locking hole 309.

[0021] The third-level rectangular tube 301 is a hollow rectangular tube, and the dimensions of each side are smaller than those of the second-level rectangular tube 201. The third-level rectangular tube 301 is located inside the second-level rectangular tube 201.

[0022] The third-level locking assembly 303 is fixedly installed on the left side of the third-level rectangular tube 301 near the top, and the circular lock tongue of the third-level locking assembly 303 passes through the tube wall of the third-level rectangular tube 301 along the radial direction of the third-level rectangular tube 301, and extends into the third-level rectangular tube 301 to be inserted into the fourth-level upper lock hole 404 or the fourth-level lower lock hole 405 on the fourth-level rectangular tube 401 located in the third-level rectangular tube 301; when the device is fully unfolded and folded, the circular lock tongue of the third-level locking assembly 303 is in an extended state and inserted into the third-level lower lock hole 309 or the third-level upper lock hole 308; during the unfolding process of the device, the circular lock tongue of the third-level locking assembly 303 is in a retracted state;

[0023] The third-stage first upper pulley 304 and the third-stage second upper pulley 305 are respectively fixedly mounted on the front and rear edges of the top of the third-stage rectangular tube 301;

[0024] The third-stage first lower pulley 306 and the third-stage second lower pulley 307 are respectively fixedly mounted on the front and rear sides of the bottom of the third-stage rectangular tube 301;

[0025] The third-level upper locking hole 308 and the third-level lower locking hole 309 are fixedly installed on the left wall side of the third-level rectangular tube 301 at the top position and the bottom position respectively.

[0026] Further, in the above device, the four-stage mast 4 comprises: a four-stage rectangular tube 401, a four-stage first lower pulley 402, a four-stage second lower pulley 403, a four-stage upper locking hole 404 and a four-stage lower locking hole 405;

[0027] The fourth-level rectangular tube 401 is a hollow rectangular tube, the dimensions of each side of which are smaller than those of the third-level rectangular tube 301, and is located inside the third-level rectangular tube 301;

[0028] The fourth-stage first lower pulley 402 and the fourth-stage second lower pulley 403 are respectively fixedly mounted on the front and rear sides of the bottom of the fourth-stage rectangular tube 401;

[0029] The fourth-level upper locking hole 404 and the fourth-level lower locking hole 405 are fixedly installed on the left wall side of the fourth-level rectangular tube 401 at the top position and the bottom position respectively.

[0030] Furthermore, in the above device, the rope drive assembly includes: a mounting base 601 , a left support seat 602 , a right support seat 603 , a winding drum 604 , a motor reducer assembly 605 , and a rope 606 . Among them, the mounting base plate 601 is fixedly connected to the bottom of the first-level rectangular cylinder 101, and the left support seat 602 and the right support seat 603 are respectively fixedly connected to the mounting base plate 601; the two ends of the winding drum 604 are respectively connected to the left support seat 602 and the right support seat 603 through bearings, and the motor reducer assembly 605 is fixedly installed on the right support seat 603, and the output shaft of the motor reducer assembly 605 is connected to the right end of the winding drum 604 through a coupling; the rope 606 is wound on the winding drum 604, and after being wound out from the winding drum 604, it is reciprocated between the rectangular cylinders of each level through pulleys of each level, and finally returns to the winding drum 604 for winding; under the drive of the motor reducer assembly 605, the winding drum 604 rotates to allow the rope 606 to be wound on the winding drum 604.

[0031] Furthermore, in the above device, the arrangement path of the rope 606 is as follows: after being wound off the winding drum 604, it passes through the first-level second lower pulley 107 to achieve a 90° reversal, passes through the gap between the first-level rectangular cylinder 101 and the second-level rectangular cylinder 201 to the first-level second upper pulley 105 to achieve a 180° reversal, then passes through the gap between the first-level rectangular cylinder 101 and the second-level rectangular cylinder 201 to the second-level second lower pulley 207 to achieve a 180° reversal, and then passes through the gap between the second-level rectangular cylinder 201 and the third-level rectangular cylinder 301 to the second-level second upper pulley The rope 606 passes through the gap between the second-stage rectangular cylinder 201 and the third-stage rectangular cylinder 301 to the third-stage second lower pulley 307 to realize 180° reversal, then passes through the gap between the third-stage rectangular cylinder 301 and the fourth-stage rectangular cylinder 401 to the third-stage second upper pulley 305 to realize 180° reversal, and then passes through the gap between the third-stage rectangular cylinder 301 and the fourth-stage rectangular cylinder 401 to the fourth-stage second lower pulley 403 to realize 90° reversal, and the rope 606 leads to the fourth-stage first lower pulley 402, and realizes 90° reversal through the pulley;

[0032] The rope 606 passes through the gap between the tertiary rectangular cylinder 301 and the quaternary rectangular cylinder 401 to the tertiary first upper pulley 304 to achieve a 180° reversal, then passes through the gap between the tertiary rectangular cylinder 301 and the quaternary rectangular cylinder 401 to the tertiary first lower pulley 306 to achieve a 180° reversal, then passes through the gap between the secondary rectangular cylinder 201 and the tertiary rectangular cylinder 301 to the secondary first upper pulley 204 to achieve a 180° reversal, then passes through the gap between the secondary rectangular cylinder 201 and the tertiary rectangular cylinder 301 to the secondary first lower pulley 206 to achieve a 180° reversal, then passes through the gap between the primary rectangular cylinder 101 and the secondary rectangular cylinder 201 to the primary first upper pulley 104 to achieve a 180° reversal, then passes through the gap between the primary rectangular cylinder 101 and the secondary rectangular cylinder 201 to the primary first lower pulley 106 to achieve a 90° reversal, and finally returns to the winding drum 604 for winding.

[0033] Further, in the above device, the primary mast 1 comprises: a primary stopper 102, which is fixedly mounted on the front, left, rear and right sides of the top of the primary rectangular tube 101, respectively, and the primary stopper 102 protrudes from the inner wall of the primary rectangular tube 101 along the radial direction of the primary rectangular tube 101;

[0034] The secondary mast 2 further includes: a secondary stopper 202, which is fixedly mounted on the front, left, rear and right sides of the top of the secondary rectangular tube 201, and the secondary stopper 202 protrudes from the inner wall of the secondary rectangular tube 201 along the radial direction of the secondary rectangular tube 201;

[0035] Furthermore, in the above device, the three-stage mast 3 also includes: a three-stage limit block 302, which is fixedly installed on the top of the three-stage rectangular tube 301, and the three-stage limit block 302 protrudes from the inner wall of the three-stage rectangular tube 301 along the radial direction of the three-stage rectangular tube 301.

[0036] Further, in the above device, the first-stage second upper pulley 105 and the first-stage first upper pulley 104 protrude from the inner wall of the first-stage rectangular tube 101 along the radial direction of the first-stage rectangular tube 101, so as to wind the rope 606 on the first-stage second upper pulley 105 and the first-stage first upper pulley 104 in the gap between the first-stage rectangular tube 101 and the second-stage rectangular tube 201, and the height of the first-stage limit block 102 protruding from the inner wall of the first-stage rectangular tube 101 is higher than the height of the second upper pulley 105 and the first-stage first upper pulley 104 protruding from the inner wall of the first-stage rectangular tube 101;

[0037] The secondary second upper pulley 205 and the secondary first upper pulley 204 protrude from the inner wall of the secondary rectangular tube 201 along the radial direction of the secondary rectangular tube 201, so as to wind the rope 606 on the secondary second upper pulley 205 and the secondary first upper pulley 204 in the gap between the secondary rectangular tube 201 and the tertiary rectangular tube 301, and the height of the secondary limit block 202 protruding from the inner wall of the secondary rectangular tube 201 is higher than the height of the secondary second upper pulley 205 and the secondary first upper pulley 204 protruding from the inner wall of the secondary rectangular tube 201;

[0038] The third-level second upper pulley 305 and the third-level first upper pulley 304 protrude from the inner wall of the third-level rectangular cylinder 301 along the radial direction of the third-level rectangular cylinder 301, so as to facilitate winding the rope 606 on the third-level second upper pulley 305 and the third-level first upper pulley 304 in the gap between the third-level rectangular cylinder 301 and the fourth-level rectangular cylinder 401, and the height of the third-level limit block 302 protruding from the inner wall of the third-level rectangular cylinder 301 is higher than the height of the third-level second upper pulley 305 and the third-level first upper pulley 304 protruding from the inner wall of the third-level rectangular cylinder 301.

[0039] Compared with the prior art, the telescopic sail device of the present invention comprises: a central telescopic mast, a telescopic sail wing surface, and a rope drive assembly. The central telescopic mast is composed of a plurality of hollow rectangular tubes cascaded and nested, and can realize axial extension movement. The telescopic sail wing surface is composed of a plurality of curved sails cascaded and nested, and each level of sail is fixedly connected to the corresponding hollow rectangular tube, and then extends axially. The rope drive assembly is mainly composed of a winding drum, a rope and a pulley, and the rope is reciprocated between the various levels of rectangular tubes through the pulley, and the rope is wound on the winding drum to drive the entire sail device to extend axially. When the entire sail device is fully unfolded, the axial length is long, and a larger windward surface can be obtained; when fully folded, the central mast and the sail wing surface are compactly folded, the windward area is small, and the folded volume is small. The sail device of the present invention has a central telescopic mast, which can play a role in supporting the sail and effectively improve the overall wind resistance. The device is extended by rope drive, and the driving device is light in weight and simple to control. In addition, the single-stage rectangular tube and the corresponding sail wing surface of the present invention can be used as a modular unit and axially expanded to obtain a sail device with a longer axial length and a larger windward area. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 is a schematic diagram of a retractable sail device according to an embodiment of the present invention when it is fully deployed;

[0041] Figure 2 A schematic diagram of a central telescopic mast of a telescopic sail device according to an embodiment of the present invention;

[0042] Figure 3a A schematic diagram of a primary mast of a telescopic sail device according to an embodiment of the present invention;

[0043] Figure 3b for Figure 3a An enlarged schematic diagram of A in FIG.

[0044] Figure 3c for Figure 3a An enlarged schematic diagram of point B in FIG.

[0045] Figure 4a A schematic diagram of a secondary mast of a telescopic sail device according to an embodiment of the present invention;

[0046] Figure 4b for Figure 4a An enlarged schematic diagram of C in FIG.

[0047] Figure 4c for Figure 4a An enlarged schematic diagram of D in FIG.

[0048] Figure 5a A schematic diagram of a three-stage mast of a telescopic sail device according to an embodiment of the present invention;

[0049] Figure 5b for Figure 5a An enlarged schematic diagram of point E in FIG.

[0050] Figure 5c for Figure 5a An enlarged schematic diagram of F in FIG.

[0051] Figure 6a A schematic diagram of a four-stage mast of a telescopic sail device according to an embodiment of the present invention;

[0052] Figure 6b for Figure 6a An enlarged schematic diagram of G in FIG.

[0053] Figure 7 A schematic diagram of a fully folded retractable sail device according to an embodiment of the present invention;

[0054] Figure 8 It is a schematic diagram of a circular lock tongue of a primary locking assembly according to an embodiment of the present invention being inserted into a secondary upper lock hole on a secondary rectangular cylinder;

[0055] Fig. 9 It is a schematic diagram of a first-stage mast, a second-stage mast, a third-stage mast and a fourth-stage mast when they are folded in accordance with an embodiment of the present invention;

[0056] Fig.10 for Fig. 9 A schematic cross-sectional view of one side of

[0057] Fig.11 FIG. 4 is a schematic diagram of a rope arrangement path according to an embodiment of the present invention. DETAILED DESCRIPTION

[0058] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0059] like Figure 1 , 2 , Figure 3a-3c , Figure 4a-4c , Figure 5a-5c , Figure 6a-6b , Figures 7 to 11 As shown, the present invention provides a telescopic sail device, which includes: a central telescopic mast, a telescopic sail wing surface, and a rope driving assembly.

[0060] like Figure 2 As shown, the central telescopic mast comprises: a primary mast 1, a secondary mast 2, a tertiary mast 3 and a quaternary mast 4 which are sequentially connected from the outside to the inside. When the central telescopic mast is folded, the primary mast 1, the secondary mast 2, the tertiary mast 3 and the quaternary mast 4 are sequentially connected from the outside to the inside.

[0061] like Figure 1 As shown, the telescopic sail wing surface includes: a first-level sail 501, a second-level sail 502, a third-level sail 503 and a fourth-level sail 504, wherein the first-level sail 501, the second-level sail 502, the third-level sail 503 and the fourth-level sail 504 are hollow structures, the first-level mast 1 is inserted and fixed in the hollow structure of the first-level sail 501, the second-level mast 2 is inserted and fixed in the hollow structure of the second-level sail 502, the third-level mast 3 is inserted and fixed in the hollow structure of the third-level sail 503, and the fourth-level mast 4 is inserted and fixed in the hollow structure of the fourth-level sail 504. Specifically, the first-level sail 501, the second-level sail 502, the third-level sail 503 and the fourth-level sail 504 are a crescent-shaped structure, which is hollow in the middle; the first-level mast 1 is inserted into the first-level sail 501 from bottom to top, such as the center position of the interior, and the top of the first-level mast 1 and the top of the first-level sail 501 are fixedly connected by screws, so that the two are connected as a whole. The other second, third and fourth masts and the second, third and fourth sails are fixedly connected in the same way respectively.

[0062] like Figure 7 As shown, the first-level sail 501, the second-level sail 502, the third-level sail 503 and the fourth-level sail 504 are all in the shape of a crescent surface and are hollow inside; from the first-level sail to the fourth-level sail, the size gradually increases in proportion, and the sails of each level are installed in a nested manner; the first-level mast 1 is inserted into the first-level sail 501 from bottom to top, the top of the first-level sail 501 is fixedly connected to the top of the first-level rectangular tube 101 of the first-level sail 501 by screws, the top of the second-level sail is fixedly connected to the top of the second-level rectangular tube of the second-level sail 502, the top of the third-level sail is fixedly connected to the top of the third-level rectangular tube of the third-level sail 503, and the top of the fourth-level sail is fixedly connected to the top of the fourth-level rectangular tube of the fourth-level sail 504.

[0063] like Figure 7As shown, when the retractable sail device is fully folded, the fourth-level sail 504, the third-level sail 503, the second-level sail 502 and the first-level sail 501 are arranged from the outside to the inside in sequence, among which the outermost one is the fourth-level sail 504 and the innermost one is the first-level sail 501.

[0064] like Figure 2 As shown, the first-level mast 1, the second-level mast 2, the third-level mast 3 and the fourth-level mast 4 are nested in sequence from outside to inside, among which the outermost one is the first-level mast 1 and the innermost one is the fourth-level mast 4; the nested mast structures of each level can be similar to the telescopic antenna of a traditional radio and can be extended and retracted along the axial direction; the sails of each level are fixedly connected to the corresponding first-level mast, and the sails of each level are extended and retracted together with the corresponding first-level mast.

[0065] The rope drive assembly is respectively connected to the primary mast 1, the secondary mast 2, the tertiary mast 3 and the quaternary mast 4 to drive the primary mast 1, the secondary mast 2, the tertiary mast 3 and the quaternary mast 4 to extend or retract, thereby driving the primary sail 501, the secondary sail 502, the tertiary sail 503 and the quaternary sail 504 to extend or retract.

[0066] like Figure 3a , 3b As shown in 3c, the first-level mast 1 includes: a first-level rectangular tube 101, a first-level limit block 102, a first-level locking assembly 103, a first-level upper pulley 104, a second-level upper pulley 105, a first-level lower pulley 106 and a second-level lower pulley 107.

[0067] The first-level rectangular tube 101 is a hollow rectangular tube, and the bottom of the first-level rectangular tube 101 is fixedly connected to the base;

[0068] The top of the primary rectangular tube 101 includes: the front side, left side, rear side and right side connected in sequence from head to tail to form a rectangle. Correspondingly, the front side is located at the top of the front wall of the primary rectangular tube 101, the left side is located at the top of the left wall of the primary rectangular tube 101, the rear side is located at the top of the rear wall of the primary rectangular tube 101, and the right side is located at the top of the right wall of the primary rectangular tube 101. The front wall, left wall, rear wall and right wall of the primary rectangular tube 101 are connected in sequence from head to tail to form the primary rectangular tube 101, wherein:

[0069] There are 8 first-level stop blocks 102, which are fixedly mounted on the front, left, back and right sides of the top of the first-level rectangular tube 101, with 2 stop blocks 102 on each side. The first-level stop blocks 102 protrude from the inner wall of the first-level rectangular tube 101 along the radial direction of the first-level rectangular tube 101, as shown in FIG. Figure 3bAs shown, since the secondary rectangular tube 201 is nested and inserted into the primary rectangular tube 101, the external dimension of the secondary rectangular tube 201 is smaller than the internal dimension of the primary rectangular tube 101, and there is a gap between the secondary rectangular tube 201 and the primary rectangular tube 101, the secondary rectangular tube 201 will shake when moving. In order to avoid this problem, a primary limit block 102 is installed, and the side of the protruding primary limit block 102 plays a role of supporting and limiting the secondary rectangular tube 201, thereby reducing the shaking of the rectangular tube during the movement process;

[0070] like Figure 3b As shown, the primary locking assembly 103 is fixedly mounted on the left side of the primary rectangular tube 101 near the top, and the circular locking tongue of the primary locking assembly 103 is concentric with the circular through hole of the secondary upper locking hole 208 of the secondary mast 2 and the circular through hole of the secondary lower locking hole 209 of the secondary mast 2. Figure 8 As shown, the circular lock tongue of the primary locking assembly 103 passes through the wall of the primary rectangular tube 101 along the radial direction of the primary rectangular tube 101, and extends into the primary rectangular tube 101 to be inserted into the secondary upper lock hole 208 or the secondary lower lock hole 209 on the secondary rectangular tube 201 located inside the primary rectangular tube 101;

[0071] like Figure 3b As shown, the first upper pulley 104 and the second upper pulley 105 are respectively fixedly mounted on the front and rear edges of the top of the first rectangular tube 101;

[0072] like Figure 3c As shown, the first lower pulley 106 and the second lower pulley 107 are fixedly installed at the bottom of the inner side of the front and rear walls of the first rectangular tube 101 respectively.

[0073] The circular lock tongue of the primary locking assembly 103 can be extended and retracted in a vertical direction perpendicular to the left wall side of the primary rectangular tube 101; when the device is fully unfolded and folded, the circular lock tongue of the primary locking assembly 103 is in an extended state and inserted into the secondary lower lock hole 209 or the secondary upper lock hole 208; during the unfolding process of the device, the circular lock tongue of the primary locking assembly 103 is in a retracted state; wherein, when the device is fully folded, the circular lock tongue of the primary locking assembly 103 is inserted into the circular through hole of the secondary upper lock hole 208 of the secondary mast 2; when the device is fully unfolded, the circular lock tongue of the primary locking assembly 103 is inserted into the circular through hole of the secondary lower lock hole 209 of the secondary mast 2.

[0074] like Figure 4a , 4b As shown in 4c, the secondary mast 2 includes: a secondary rectangular tube 201, a secondary limit block 202, a secondary locking assembly 203, a secondary first upper pulley 204, a secondary second upper pulley 205, a secondary first lower pulley 206, a secondary second lower pulley 207, a secondary upper locking hole 208 and a secondary lower locking hole 209.

[0075] The secondary rectangular tube 201 is a hollow rectangular tube, and the dimensions of each side are smaller than those of the primary rectangular tube 101. The secondary rectangular tube 201 is located inside the primary rectangular tube 101.

[0076] like Figure 4b As shown, the top of the secondary rectangular tube 201 includes: the front side, left side, rear side and right side connected in sequence from head to tail to form a rectangle. Correspondingly, the front side is located at the top of the front wall of the secondary rectangular tube 201, the left side is located at the top of the left wall of the secondary rectangular tube 102, the rear side is located at the top of the rear wall of the secondary rectangular tube 201, and the right side is located at the top of the right wall of the secondary rectangular tube 201. The front wall, left wall, rear wall and right wall of the secondary rectangular tube 201 are connected in sequence from head to tail to form the secondary rectangular tube 201, wherein,

[0077] like Figure 4b As shown, there are 8 secondary stop blocks 202, which are fixedly installed on the front, left, rear and right sides of the top of the secondary rectangular tube 201, with 2 secondary stop blocks 202 on each side. The secondary stop blocks 202 protrude from the inner wall of the secondary rectangular tube 201 along the radial direction of the secondary rectangular tube 201, as shown in FIG. Figure 4b As shown, since the third-level rectangular tube 301 is nested and inserted into the second-level rectangular tube 201, the outer dimension of the third-level rectangular tube 301 is smaller than the inner dimension of the second-level rectangular tube 201, and there is a gap between the third-level rectangular tube 301 and the second-level rectangular tube 201, the third-level rectangular tube 201 will shake when moving. In order to avoid this problem, a second-level limit block 202 is installed, and the side of the protruding second-level limit block 202 plays a role of supporting and limiting the third-level rectangular tube 301, thereby reducing the shaking of the rectangular tube during the movement process;

[0078] like Figure 4b As shown, the secondary locking assembly 203 is fixedly installed on the left wall side of the secondary rectangular tube 201 near the top position, and the circular locking tongue of the secondary locking assembly 203 is respectively concentric with the circular through hole of the third-level upper locking hole 308 and the circular through hole of the third-level lower locking hole 309 on the third-level mast 3, and the circular locking tongue of the secondary locking assembly 203 passes through the cylinder wall of the secondary rectangular tube 201 along the radial direction of the secondary rectangular tube 201, and extends into the secondary rectangular tube 201 to be inserted into the third-level upper locking hole 308 or the third-level lower locking hole 309 on the third-level rectangular tube 301 located in the secondary rectangular tube 201;

[0079] like Figure 4b As shown, the secondary first upper pulley 204 and the secondary second upper pulley 205 are respectively fixedly mounted on the front and rear edges of the top of the secondary rectangular tube 201;

[0080] like Figure 4c As shown, the second-stage first lower pulley 206 and the second-stage second lower pulley 207 are respectively fixedly mounted on the front and rear sides of the bottom of the second-stage rectangular tube 201;

[0081] The secondary upper lock hole 208 and the secondary lower lock hole 209 are respectively fixedly installed on the left wall side of the secondary rectangular tube 201 near the top and the bottom, and a circular through hole is formed on each of the secondary upper lock hole 208 and the secondary lower lock hole 209;

[0082] The circular lock tongue in the secondary locking assembly 203 can be extended and retracted in a vertical direction perpendicular to the left wall side of the secondary rectangular tube 201; when the device is fully unfolded and folded, the circular lock tongue in the secondary locking assembly 203 is in an extended state and inserted into the third-level lower lock hole 309 or the third-level upper lock hole 308 on the third-level rectangular tube 301; during the unfolding process of the device, the circular lock tongue of the secondary locking assembly 203 is in a retracted state.

[0083] The secondary rectangular tube 201 can slide along the axial direction inside the primary rectangular tube 101; when the device is fully folded, the circular lock tongue of the primary locking assembly 103 is inserted into the circular through hole of the secondary upper lock hole 208, the circular lock tongue of the secondary locking assembly 203 is inserted into the circular through hole of the tertiary upper lock hole 308, and the circular lock tongue of the tertiary locking assembly 303 is inserted into the circular through hole of the fourth upper lock hole 404; when the device is fully unfolded, the circular lock tongue of the primary locking assembly 103 is inserted into the circular through hole of the secondary lower lock hole 209, the circular lock tongue of the secondary locking assembly 203 is inserted into the circular through hole of the tertiary lower lock hole 309, and the circular lock tongue of the tertiary locking assembly 303 is inserted into the circular through hole of the fourth lower lock hole 405.

[0084] like Figure 5a , 5b As shown in Figure 5c, the three-stage mast 3 includes: a three-stage rectangular tube 301, a three-stage limit block 302, a three-stage locking assembly 303, a three-stage first upper pulley 304, a three-stage second upper pulley 305, a three-stage first lower pulley 306, a three-stage second lower pulley 307, a three-stage upper locking hole 308 and a three-stage lower locking hole 309.

[0085] The third-level rectangular tube 301 is a hollow rectangular tube, and the dimensions of each side are smaller than those of the second-level rectangular tube 201. The third-level rectangular tube 301 is located inside the second-level rectangular tube 201.

[0086] like Figure 5b As shown, the top of the three-level rectangular tube 301 includes: the front side, left side, rear side and right side connected in sequence from head to tail to form a rectangle. Correspondingly, the front side is located at the top of the front wall of the three-level rectangular tube 301, the left side is located at the top of the left wall of the three-level rectangular tube 301, the rear side is located at the top of the rear wall of the three-level rectangular tube 301, and the right side is located at the top of the right wall of the three-level rectangular tube 301. The front wall, left wall, rear wall and right wall of the three-level rectangular tube 301 are connected in sequence from head to tail to form the three-level rectangular tube 301, wherein,

[0087] like Figure 5bAs shown, there are 8 three-level stop blocks 302, which are fixedly installed on the top of the three-level rectangular tube 301, with 2 three-level stop blocks 302 on each side. The three-level stop blocks 302 protrude from the inner wall of the three-level rectangular tube 301 along the radial direction of the three-level rectangular tube 301, as shown in FIG. Figure 5b As shown, since the fourth-level rectangular tube 401 is nested and inserted into the third-level rectangular tube 301, the outer dimension of the fourth-level rectangular tube 401 is smaller than the inner dimension of the third-level rectangular tube 301, and there is a gap between the fourth-level rectangular tube 401 and the third-level rectangular tube 301, the fourth-level rectangular tube 401 will shake when moving. In order to avoid this problem, the third-level limit block 402 is installed, and the side of the protruding third-level limit block 302 plays a role of supporting and limiting the fourth-level rectangular tube 401, thereby reducing the shaking of the rectangular tube during the movement process;

[0088] like Figure 5b As shown, the third-level locking assembly 303 is fixedly installed on the left side of the third-level rectangular tube 301 near the top, and the circular locking tongue of the third-level locking assembly is concentric with the circular through hole of the fourth-level upper locking hole 404 and the circular through hole of the fourth-level lower locking hole 405 on the fourth-level mast 4 respectively. The circular locking tongue of the third-level locking assembly 303 passes through the cylinder wall of the third-level rectangular tube 301 along the radial direction of the third-level rectangular tube 301, and extends into the third-level rectangular tube 301 to be inserted into the fourth-level upper locking hole 404 or the fourth-level lower locking hole 405 on the fourth-level rectangular tube 401 located in the third-level rectangular tube 301;

[0089] like Figure 5b As shown, the third-stage first upper pulley 304 and the third-stage second upper pulley 305 are respectively fixedly mounted on the front and rear edges of the top of the third-stage rectangular tube 301;

[0090] like Figure 5c As shown, the third-stage first lower pulley 306 and the third-stage second lower pulley 307 are respectively fixedly mounted on the front and rear sides of the bottom of the third-stage rectangular tube 301;

[0091] The third-level upper locking hole 308 and the third-level lower locking hole 309 are respectively fixedly installed on the left wall side of the third-level rectangular tube 301 at the top and bottom positions, and each of the third-level upper locking hole 308 and the third-level lower locking hole 309 has a circular through hole.

[0092] The circular lock tongue of the three-stage locking assembly 303 can be extended and retracted in a vertical direction perpendicular to the left wall side of the three-stage rectangular tube 301; when the device is fully unfolded and folded, the circular lock tongue of the three-stage locking assembly 303 is in an extended state and inserted into the three-stage lower lock hole 309 or the three-stage upper lock hole 308; during the unfolding process of the device, the circular lock tongue of the three-stage locking assembly 303 is in a retracted state.

[0093] The tertiary rectangular tube 301 can slide along the axial direction inside the secondary rectangular tube 201; when the device is fully folded, the circular lock tongue of the primary locking assembly 103 is inserted into the circular through hole of the secondary upper lock hole 208, and the circular lock tongue of the secondary locking assembly 203 is inserted into the circular through hole of the tertiary upper lock hole 308; when the device is fully unfolded, the circular lock tongue of the primary locking assembly 103 is inserted into the circular through hole of the secondary lower lock hole 209, and the circular lock tongue of the secondary locking assembly 203 is inserted into the circular through hole of the tertiary lower lock hole 309.

[0094] like Figure 6a and 6b As shown, the four-stage mast 4 includes: a four-stage rectangular tube 401 , a four-stage first lower pulley 402 , a four-stage second lower pulley 403 , a four-stage upper locking hole 404 and a four-stage lower locking hole 405 .

[0095] The fourth-level rectangular tube 401 is a hollow rectangular tube, the dimensions of each side of which are smaller than those of the third-level rectangular tube 301, and is located inside the third-level rectangular tube 301;

[0096] like Figure 6b As shown, the bottom of the four-stage rectangular tube 401 includes: the front side, left side, rear side and right side connected in sequence from head to tail to form a rectangle. Correspondingly, the front side is located at the bottom of the front wall of the four-stage rectangular tube 401, the left side is located at the bottom of the left wall of the four-stage rectangular tube 401, the rear side is located at the top of the rear wall of the four-stage rectangular tube 401, and the right side is located at the bottom of the right wall of the four-stage rectangular tube 401. The front wall, left wall, rear wall and right wall of the four-stage rectangular tube 401 are connected in sequence from head to tail to form the four-stage rectangular tube 401, wherein,

[0097] like Figure 6b As shown, the fourth-stage first lower pulley 402 and the fourth-stage second lower pulley 403 are respectively fixedly mounted on the front and rear sides of the bottom of the fourth-stage rectangular tube 401;

[0098] like Figure 6b As shown, the fourth-level upper locking hole 404 and the fourth-level lower locking hole 405 are respectively fixedly installed on the left wall side of the fourth-level rectangular tube 401 near the top and bottom positions, and a circular through hole is opened on the fourth-level upper locking hole 404 and the fourth-level lower locking hole 405.

[0099] The fourth-level rectangular tube 401 can slide along the axial direction inside the third-level rectangular tube 301; when the device is fully folded, the circular lock tongue of the first-level locking component 103 is inserted into the circular through hole of the second-level upper lock hole 208, the circular lock tongue of the second-level locking component 203 is inserted into the circular through hole of the third-level upper lock hole 308, and the circular lock tongue of the third-level locking component 303 is inserted into the circular through hole of the fourth-level upper lock hole 404; when the device is fully unfolded, the circular lock tongue of the first-level locking component 103 is inserted into the circular through hole of the second-level lower lock hole 209, the circular lock tongue of the second-level locking component 203 is inserted into the circular through hole of the third-level lower lock hole 309, and the circular lock tongue of the third-level locking component 303 is inserted into the circular through hole of the fourth-level lower lock hole 405.

[0100] like Figure 3c As shown, the rope drive assembly includes: a mounting base 601, a left support seat 602, a right support seat 603, a bobbin 604, a motor reducer assembly 605, and a rope 606. The mounting base 601 is fixedly connected to the bottom of the first-level rectangular tube 101, and the left support seat 602 and the right support seat 603 are fixedly connected to the mounting base 601 respectively; the two ends of the bobbin 604 are respectively connected to the left support seat 602 and the right support seat 603 through bearings, the motor reducer assembly 605 is fixedly installed on the right support seat 603, and the output shaft of the motor reducer assembly 605 is connected to the right end of the bobbin 604 through a coupling; the rope 606 is wound on the bobbin 604, and after being wound out of the bobbin 604, it is reciprocated between the rectangular tubes of each level through pulleys of each level, and finally returns to the bobbin 604 for winding. Driven by the motor reducer assembly 605 , the bobbin 604 can rotate so that the rope 606 is wound around the bobbin 604 .

[0101] Optional, such as Fig.11 As shown, the arrangement path of the rope 606 is as follows: after being wound from the winding drum 604, it passes through the first-level second lower pulley 107 to achieve a 90° reversal, passes through the gap between the first-level rectangular cylinder 101 and the second-level rectangular cylinder 201 to the first-level second upper pulley 105 to achieve a 180° reversal, then passes through the gap between the first-level rectangular cylinder 101 and the second-level rectangular cylinder 201 to the second-level second lower pulley 207 to achieve a 180° reversal, and then passes through the gap between the second-level rectangular cylinder 201 and the third-level rectangular cylinder 301 to the second-level second upper pulley 205 to achieve a The rope 606 is turned 180°, and then passes through the gap between the secondary rectangular cylinder 201 and the tertiary rectangular cylinder 301 to the third-level second lower pulley 307 to realize 180° turning, then passes through the gap between the third-level rectangular cylinder 301 and the fourth-level rectangular cylinder 401 to the third-level second upper pulley 305 to realize 180° turning, and then passes through the gap between the third-level rectangular cylinder 301 and the fourth-level rectangular cylinder 401 to the fourth-level second lower pulley 403 to realize 90° turning, and the rope 606 leads to the fourth-level first lower pulley 402, and realizes 90° turning through the pulley;

[0102] The rope 606 passes through the gap between the tertiary rectangular cylinder 301 and the quaternary rectangular cylinder 401 to the tertiary first upper pulley 304 to achieve a 180° reversal, then passes through the gap between the tertiary rectangular cylinder 301 and the quaternary rectangular cylinder 401 to the tertiary first lower pulley 306 to achieve a 180° reversal, then passes through the gap between the secondary rectangular cylinder 201 and the tertiary rectangular cylinder 301 to the secondary first upper pulley 204 to achieve a 180° reversal, then passes through the gap between the secondary rectangular cylinder 201 and the tertiary rectangular cylinder 301 to the secondary first lower pulley 206 to achieve a 180° reversal, then passes through the gap between the primary rectangular cylinder 101 and the secondary rectangular cylinder 201 to the primary first upper pulley 104 to achieve a 180° reversal, then passes through the gap between the primary rectangular cylinder 101 and the secondary rectangular cylinder 201 to the primary first lower pulley 106 to achieve a 90° reversal, and finally returns to the winding drum 604 for winding.

[0103] Among them, the first-level second upper pulley 105 and the first-level first upper pulley 104 protrude from the inner wall of the first-level rectangular tube 101 along the radial direction of the first-level rectangular tube 101, so as to wind the rope 606 on the first-level second upper pulley 105 and the first-level first upper pulley 104 in the gap between the first-level rectangular tube 101 and the second-level rectangular tube 201, and the height of the first-level limit block 102 protruding from the inner wall of the first-level rectangular tube 101 is higher than the height of the second upper pulley 105 and the first-level first upper pulley 104 protruding from the inner wall of the first-level rectangular tube 101;

[0104] The secondary second upper pulley 205 and the secondary first upper pulley 204 protrude from the inner wall of the secondary rectangular tube 201 along the radial direction of the secondary rectangular tube 201, so as to wind the rope 606 on the secondary second upper pulley 205 and the secondary first upper pulley 204 in the gap between the secondary rectangular tube 201 and the tertiary rectangular tube 301, and the height of the secondary limit block 202 protruding from the inner wall of the secondary rectangular tube 201 is higher than the height of the secondary second upper pulley 205 and the secondary first upper pulley 204 protruding from the inner wall of the secondary rectangular tube 201;

[0105] The third-level second upper pulley 305 and the third-level first upper pulley 304 protrude from the inner wall of the third-level rectangular cylinder 301 along the radial direction of the third-level rectangular cylinder 301, so as to facilitate winding the rope 606 on the third-level second upper pulley 305 and the third-level first upper pulley 304 in the gap between the third-level rectangular cylinder 301 and the fourth-level rectangular cylinder 401, and the height of the third-level limit block 302 protruding from the inner wall of the third-level rectangular cylinder 301 is higher than the height of the third-level second upper pulley 305 and the third-level first upper pulley 304 protruding from the inner wall of the third-level rectangular cylinder 301.

[0106] The first-stage mast 1 is equipped with a first-stage sail 501 , the second-stage mast 2 is equipped with a second-stage sail 502 , the third-stage mast 3 is equipped with a third-stage sail 503 , and the fourth-stage mast 4 is equipped with a fourth-stage sail 504 .

[0107] In the fully retracted state, Figure 7-10 As shown, the circular lock tongue of the first-level locking component 103 extends out and is inserted into the circular through hole of the second-level upper lock hole 208, the circular lock tongue of the second-level locking component 203 extends out and is inserted into the circular through hole of the third-level upper lock hole 308, and the circular lock tongue of the third-level locking component 303 extends out and is inserted into the circular through hole of the fourth-level upper lock hole 404. The levels are completely locked and the entire device cannot be unfolded.

[0108] The process of unfolding the sailing device is as follows. When the device begins to unfold, the circular lock tongue of the third-level locking assembly 303 retracts from the circular through hole of the fourth-level upper lock hole 404; the motor reducer assembly 605 drives the winding drum 604 to rotate, so that the rope 606 is wound on the winding drum 604, and then drives the fourth-level mast 4 and the fourth-level sail 504 to extend axially as a whole; when the fourth-level mast 4 is unfolded to the right position, the circular lock tongue of the third-level locking assembly 303 extends out and inserts into the circular through hole of the fourth-level lower lock hole 405; next, the circular lock tongue of the second-level locking assembly 203 retracts from the circular through hole of the third-level upper lock hole 308, and the rope 606 is wound on the winding drum 604. Driven by the rope 606, the third-stage mast 3 and the third-stage sail 503 are extended axially as a whole; when the third-stage mast 3 is deployed in place, the circular lock tongue of the second-stage locking assembly 203 is extended and inserted into the circular through hole of the third-stage lower lock hole 309; finally, the circular lock tongue of the first-stage locking assembly 103 is retracted from the circular through hole of the second-stage upper lock hole 208, and driven by the rope 606, the second-stage mast 2 and the second-stage sail 502 are extended axially as a whole; when the second-stage mast 2 is deployed in place, the circular lock tongue of the first-stage locking assembly 103 is extended and inserted into the circular through hole of the second-stage lower lock hole 209. At this point, the entire sailing device is completely unrestricted. Figure 7 Shown fully collapsed, expands to Figure 1 In addition, by controlling the order in which the bolts in the different locking assemblies are retracted, the order in which the masts and sails are deployed can be changed.

[0109] With the rapid development of the shipping industry, higher requirements are placed on the fuel consumption and carbon emissions of ships. The use of large sailing devices is an effective solution. The sailing device of the present invention can have a large windward area when working, and can be compacted to a smaller volume when not working. The expandable modular retractable sailing device can capture wind power and provide auxiliary propulsion for the ship, greatly improving navigation efficiency and reducing ship energy consumption. It is of great significance to help the shipping industry reduce its dependence on fossil fuels and cope with the challenges brought by climate change.

[0110] In summary, the telescopic sail device of the present invention comprises: a central telescopic mast, a telescopic sail wing surface, and a rope drive assembly. The central telescopic mast is composed of a plurality of hollow rectangular tubes cascaded and nested, and can realize axial extension movement. The telescopic sail wing surface is composed of a plurality of curved sails cascaded and nested, and each level of sail is fixedly connected to the corresponding hollow rectangular tube, and then extends axially. The rope drive assembly is mainly composed of a winding drum, a rope and a pulley, and the rope is reciprocated between the various levels of rectangular tubes through the pulley, and the rope is wound on the winding drum to drive the entire sail device to extend axially. When the entire sail device is fully deployed, the axial length is long, and a larger windward surface can be obtained; when fully folded, the central mast and the sail wing surface are compactly folded, the windward area is small, and the folded volume is small. The sail device of the present invention has a central telescopic mast, which can play a role in supporting the sail and effectively improve the overall wind resistance. The device is extended by rope drive, and the driving device is light in weight and simple to control. In addition, the single-stage rectangular tube and the corresponding sail wing surface of the present invention can be used as a modular unit and axially expanded to obtain a sail device with a longer axial length and a larger windward area.

[0111] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved. In addition, it is obvious that the word "comprising" does not exclude other units or steps, and the singular does not exclude the plural. Multiple units or devices stated in the device claim can also be implemented by one unit or device through software or hardware. The words first, second, etc. are used to indicate names, and do not indicate any particular order.

Claims

1. A retractable sail device, characterized in that: include: A central telescopic mast, telescopic sail wing and rope drive assembly, wherein: The central telescopic mast comprises: a primary mast (1), a secondary mast (2), a tertiary mast (3) and a tertiary mast (4); when the central telescopic mast is folded, the primary mast (1), the secondary mast (2), the tertiary mast (3) and the tertiary mast (4) are connected in sequence from the outside to the inside; The telescopic sail wing surface comprises: a first-level sail (501), a second-level sail (502), a third-level sail (503) and a fourth-level sail (504) which are respectively hollow structures, and the sizes of the first-level sail to the fourth-level sail gradually increase in proportion; the first-level mast (1) is inserted and fixed in the hollow structure of the first-level sail (501), the second-level mast (2) is inserted and fixed in the hollow structure of the second-level sail (502), the third-level mast (3) is inserted and fixed in the hollow structure of the third-level sail (503), and the fourth-level mast (4) is inserted and fixed in the hollow structure of the fourth-level sail (504); when the telescopic sail wing surface is folded, the fourth-level sail (504), the third-level sail (503), the second-level sail (502) and the first-level sail (501) are sequentially mounted from the outside to the inside; The rope drive assembly is respectively connected to the first-stage mast (1), the second-stage mast (2), the third-stage mast (3) and the fourth-stage mast (4) to drive the first-stage mast (1), the second-stage mast (2), the third-stage mast (3) and the fourth-stage mast (4) to extend or retract, thereby driving the first-stage sail (501), the second-stage sail (502), the third-stage sail (503) and the fourth-stage sail (504) to extend or retract.

2. The retractable sail device according to claim 1, characterized in that: The primary mast (1) comprises: a primary rectangular tube (101), a primary locking assembly (103), a primary first upper pulley (104), a primary second upper pulley (105), a primary first lower pulley (106) and a primary second lower pulley (107). The first-stage rectangular tube (101) is a hollow rectangular tube, and the bottom of the first-stage rectangular tube (101) is fixedly connected to the base; The primary locking assembly (103) is fixedly mounted on the left wall side of the primary rectangular cylinder (101) near the top, and the circular lock tongue of the primary locking assembly (103) passes through the cylinder wall of the primary rectangular cylinder (101) along the radial direction of the primary rectangular cylinder (101) and extends into the primary rectangular cylinder (101) to be inserted into the secondary upper lock hole (208) or the secondary lower lock hole (209) on the secondary rectangular cylinder (201) located inside the primary rectangular cylinder (101); when the device is fully unfolded and folded, the circular lock tongue of the primary locking assembly (103) is in an extended state and inserted into the secondary lower lock hole (209) or the secondary upper lock hole (208); during the unfolding process of the device, the circular lock tongue of the primary locking assembly (103) is in a retracted state; The first upper pulley (104) and the second upper pulley (105) are respectively fixedly mounted on the front and rear edges of the top of the first rectangular tube (101); The first lower pulley (106) of the first stage and the second lower pulley (107) of the first stage are respectively fixedly mounted on the inner sides of the front and rear walls of the first stage rectangular tube (101) near the bottom.

3. The retractable sail device according to claim 2, characterized in that: The secondary mast 2 comprises: a secondary rectangular tube (201), a secondary locking assembly (203), a secondary first upper pulley (204), a secondary second upper pulley (205), a secondary first lower pulley (206), a secondary second lower pulley (207), a secondary upper locking hole (208) and a secondary lower locking hole (209); The secondary rectangular tube (201) is a hollow rectangular tube, the dimensions of each side of the secondary rectangular tube (201) D are smaller than those of the primary rectangular tube (101), and the secondary rectangular tube (201) is located inside the primary rectangular tube (101); The circular lock tongue of the secondary locking assembly (203) passes through the cylinder wall of the secondary rectangular cylinder (201) along the radial direction of the secondary rectangular cylinder (201) and extends into the secondary rectangular cylinder (201) to be inserted into the third-level upper lock hole (308) or the third-level lower lock hole (309) on the third-level rectangular cylinder (301) located in the secondary rectangular cylinder (201); when the device is fully unfolded and folded, the circular lock tongue in the secondary locking assembly (203) is in an extended state and inserted into the third-level lower lock hole (309) or the third-level upper lock hole (308) on the third-level rectangular cylinder (301); during the unfolding process of the device, the circular lock tongue of the secondary locking assembly (203) is in a retracted state; The second-level first upper pulley (204) and the second-level second upper pulley (205) are respectively fixedly mounted on the front and rear edges of the top of the second-level rectangular tube (201); The second-stage first lower pulley (206) and the second-stage second lower pulley (207) are respectively fixedly mounted on the front and rear edges of the bottom of the second-stage rectangular tube (201); The secondary upper locking hole (208) and the secondary lower locking hole (209) are respectively fixedly mounted on the left wall side of the secondary rectangular tube (201) at the top position and the bottom position.

4. The retractable sail device according to claim 3, characterized in that: The three-stage mast (3) comprises: a three-stage rectangular tube (301), a three-stage locking assembly (303), a three-stage first upper pulley (304), a three-stage second upper pulley (305), a three-stage first lower pulley (306), a three-stage second lower pulley (307), a three-stage upper locking hole (308) and a three-stage lower locking hole (309); The third-level rectangular tube (301) is a hollow rectangular tube, the dimensions of each side of which are smaller than those of the second-level rectangular tube (201), and the third-level rectangular tube (301) is located inside the second-level rectangular tube (201); The third-level locking assembly (303) is fixedly mounted on the left side of the third-level rectangular tube (301) near the top, and the circular locking tongue of the third-level locking assembly (303) passes through the tube wall of the third-level rectangular tube (301) along the radial direction of the third-level rectangular tube (301) and extends into the third-level rectangular tube (301) to be inserted into the fourth-level upper locking hole (404) or the fourth-level lower locking hole (405) on the fourth-level rectangular tube (401) located in the third-level rectangular tube (301); when the device is fully unfolded and folded, the circular locking tongue of the third-level locking assembly (303) is in an extended state and inserted into the third-level lower locking hole (309) or the third-level upper locking hole (308); during the unfolding process of the device, the circular locking tongue of the third-level locking assembly (303) is in a retracted state; The third-level first upper pulley (304) and the third-level second upper pulley (305) are respectively fixedly mounted on the front and rear edges of the top of the third-level rectangular tube (301); The third-stage first lower pulley (306) and the third-stage second lower pulley (307) are respectively fixedly mounted on the front and rear edges of the bottom of the third-stage rectangular tube (301); The third-level upper locking hole (308) and the third-level lower locking hole (309) are respectively fixedly installed on the left wall side of the third-level rectangular tube (301) at the top position and the bottom position.

5. The retractable sail device according to claim 4, characterized in that: The four-stage mast (4) comprises: a four-stage rectangular tube (401), a four-stage first lower pulley (402), a four-stage second lower pulley (403), a four-stage upper locking hole (404) and a four-stage lower locking hole (405); The fourth-level rectangular tube (401) is a hollow rectangular tube, the dimensions of each side of which are smaller than those of the third-level rectangular tube (301), and is located inside the third-level rectangular tube (301); The fourth-stage first lower pulley (402) and the fourth-stage second lower pulley (403) are respectively fixedly mounted on the front and rear edges of the bottom of the fourth-stage rectangular cylinder (401); The fourth-level upper locking hole (404) and the fourth-level lower locking hole (405) are respectively fixedly installed at the top position and the bottom position of the left wall side of the fourth-level rectangular tube (401).

6. The retractable sail device according to claim 5, characterized in that: The rope drive assembly comprises: a mounting base (601), a left support seat (602), a right support seat (603), a winding drum (604), a motor reducer assembly (605) and a rope (606), wherein: The installation base plate (601) is fixedly connected to the bottom of the first-level rectangular tube (101), and the left support seat (602) and the right support seat (603) are fixedly connected to the installation base plate (601) respectively; the two ends of the winding drum (604) are respectively connected to the left support seat (602) and the right support seat (603) through bearings, and the motor reducer assembly (605) is fixedly installed on the right support seat (603), and the output shaft of the motor reducer assembly (605) is connected to the right end of the winding drum (604) through a coupling; the rope (606) is wound on the winding drum (604), and after being wound out from the winding drum (604), it is reciprocated and arranged between the rectangular tubes of each level through pulleys of each level, and finally returns to the winding drum (604) for winding; under the drive of the motor reducer assembly (605), the winding drum (604) rotates to allow the rope (606) to be wound on the winding drum (604).

7. The retractable sail device according to claim 6, characterized in that: The arrangement path of the rope (606) is as follows: after being wound off the winding drum (604), it passes through the first-stage second lower pulley (107) to realize 90° reversal, passes through the gap between the first-stage rectangular cylinder (101) and the second-stage rectangular cylinder (201) to the first-stage second upper pulley (105) to realize 180° reversal, then passes through the gap between the first-stage rectangular cylinder (101) and the second-stage rectangular cylinder (201) to the second-stage second lower pulley (207) to realize 180° reversal, and then passes through the gap between the second-stage rectangular cylinder (201) and the third-stage rectangular cylinder (301) to the second-stage second upper pulley (205) to realize The rope (606) is connected to the first lower pulley (402) of the fourth stage and the second upper pulley (305) of the third stage through the gap between the third stage rectangular cylinder (301) and the fourth stage rectangular cylinder (401) to realize 180° reversal. The rope (606) is connected to the first lower pulley (402) of the fourth stage and realizes 90° reversal through the gap between the third stage rectangular cylinder (301) and the fourth stage rectangular cylinder (401) to realize 90° reversal. The rope (606) passes through the gap between the third-level rectangular cylinder (301) and the fourth-level rectangular cylinder (401) to the third-level first upper pulley (304) to achieve a 180° reversal, then passes through the gap between the third-level rectangular cylinder (301) and the fourth-level rectangular cylinder (401) to the third-level first lower pulley (306) to achieve a 180° reversal, then passes through the gap between the second-level rectangular cylinder (201) and the third-level rectangular cylinder (301) to the second-level first upper pulley (204) to achieve a 180° reversal, then passes through The gap between the secondary rectangular tube (201) and the tertiary rectangular tube (301) reaches the secondary first lower pulley (206) to achieve a 180° reversal, and then passes through the gap between the primary rectangular tube (101) and the secondary rectangular tube (201) to the primary first upper pulley (104) to achieve a 180° reversal, and then passes through the gap between the primary rectangular tube (101) and the secondary rectangular tube (201) to the primary first lower pulley (106) to achieve a 90° reversal, and finally returns to the winding drum (604) for winding.

8. The retractable sail device according to claim 7, characterized in that: The first-level mast (1) comprises: a first-level stopper (102), the first-level stopper (102) being fixedly mounted on the front side, the left side, the rear side and the right side of the top of the first-level rectangular tube (101), respectively, and the first-level stopper (102) protruding from the inner wall of the first-level rectangular tube (101) along the radial direction of the first-level rectangular tube (101); The secondary mast (2) further comprises: a secondary stop block (202), the secondary stop block (202) being fixedly mounted on the front, left, rear and right sides of the top of the secondary rectangular tube (201), the secondary stop block (202) protruding from the inner wall of the secondary rectangular tube (201) along the radial direction of the secondary rectangular tube (201).

9. The retractable sail device according to claim 8, characterized in that: The three-stage mast (3) further comprises: a three-stage stop block (302), the three-stage stop block (302) being fixedly mounted on the top of the three-stage rectangular tube (301), and the three-stage stop block (302) protruding from the inner wall of the three-stage rectangular tube (301) along the radial direction of the three-stage rectangular tube (301).

10. The retractable sail device according to claim 9, characterized in that: The first-stage second upper pulley (105) and the first-stage first upper pulley (104) protrude from the inner wall of the first-stage rectangular tube (101) in the radial direction of the first-stage rectangular tube (101), so as to wind the rope (606) around the first-stage second upper pulley (105) and the first-stage first upper pulley (104) in the gap between the first-stage rectangular tube (101) and the second-stage rectangular tube (201), and the height of the first-stage limit block (102) protruding from the inner wall of the first-stage rectangular tube (101) is higher than the height of the second upper pulley (105) and the first-stage first upper pulley (104) protruding from the inner wall of the first-stage rectangular tube (101); The secondary second upper pulley (205) and the secondary first upper pulley (204) protrude from the inner wall of the secondary rectangular tube (201) in the radial direction of the secondary rectangular tube (201), so as to wind the rope (606) around the secondary second upper pulley (205) and the secondary first upper pulley (204) in the gap between the secondary rectangular tube (201) and the tertiary rectangular tube (301), and the height of the secondary limit block (202) protruding from the inner wall of the secondary rectangular tube (201) is higher than the height of the secondary second upper pulley (205) and the secondary first upper pulley (204) protruding from the inner wall of the secondary rectangular tube (201); The third-level second upper pulley (305) and the third-level first upper pulley (304) protrude from the inner wall of the third-level rectangular cylinder (301) in the radial direction of the third-level rectangular cylinder (301), so as to wind the rope (606) around the third-level second upper pulley (305) and the third-level first upper pulley (304) in the gap between the third-level rectangular cylinder (301) and the fourth-level rectangular cylinder (401), and the height of the third-level limit block (302) protruding from the inner wall of the third-level rectangular cylinder (301) is higher than the height of the third-level second upper pulley (305) and the third-level first upper pulley (304) protruding from the inner wall of the third-level rectangular cylinder (301).

Images