Protective structure for a watercraft propeller, propulsion device, watercraft propeller and watercraft movable equipment

Abstract

The application discloses a protection structure of a water area propeller, a propelling device, a water area propeller and a water area movable equipment. The protection structure comprises a first mounting piece, at least two cutting pieces, a second mounting piece and at least two poking pieces. The cutting pieces are arranged on the first mounting piece at intervals, and the poking pieces are arranged on the second mounting piece at intervals. The first mounting piece and the second mounting piece are respectively connected with a driving shaft and are opposite to each other and spaced apart in the axial direction of the driving shaft, and the cutting pieces and the poking pieces are spaced apart. One of the first mounting piece and the second mounting piece can rotate with the driving shaft, so that the poking pieces and the cutting pieces can rotate relative to each other. In the process that the poking pieces and the cutting pieces can rotate relative to each other, the poking pieces poke foreign matters into the space between the first mounting piece and the second mounting piece, and the cutting pieces cut the foreign matters in the protection structure. In the axial direction of the driving shaft, the extension coverage of the cutting pieces and the poking pieces at least partially overlaps.

Description

Technical Field

[0001] This application relates to the field of marine equipment technology, and in particular to a protective structure, propulsion device, water propulsion device, and water-movable equipment for a water propulsion device. Background Technology

[0002] A water propulsion device is an electrically driven unit that can be integrated with aquatic platforms, offering advantages such as environmental friendliness, low noise, and ease of maintenance. Typically, the propeller in a water propulsion device rotates underwater and pushes water backward. At this time, the water flow velocities at the leading and trailing edges of the propeller differ, creating a pressure difference on both sides. This causes the water propulsion device to experience a force opposite to the direction of water propulsion, propelling it forward in the direction of this force. However, due to the presence of foreign objects underwater, such as fishing lines, nets, weeds, debris, and silt, these objects may become entangled in the propeller shaft, potentially affecting the normal operation of the propeller and even damaging the water propulsion device. Utility Model Content

[0003] The embodiments of this application provide a protective structure for a water propulsion device, a water propulsion device, a water propulsion device, and a water mobile device.

[0004] This application provides a protective structure applied to the propulsion device of a water propulsion device, which includes a propulsion body and a drive shaft extending from the propulsion body. The protective structure includes a first mounting member, at least two cutting members, a second mounting member, and at least two actuating members. The first mounting member is connected to the drive shaft. The at least two cutting members are spaced apart from each other on the first mounting member. The second mounting member is connected to the drive shaft and is axially opposite and spaced apart from the first mounting member. The at least two actuating members are spaced apart from each other on the second mounting member. One of the first and second mounting members is capable of rotating with the drive shaft, allowing the actuating members and cutting members to rotate relative to each other. During the relative rotation of the actuating members and cutting members, the actuating members are used to actuate foreign objects entering between the first and second mounting members, and the cutting members are used to cut foreign objects entering between the first and second mounting members. Axially, the extension coverage areas of the cutting members and the actuating members at least partially overlap.

[0005] In some implementations, at least two cutting elements are evenly distributed around the axis of the drive shaft.

[0006] In some implementations, at least two actuating elements are evenly distributed around the axis of the drive shaft.

[0007] In some embodiments, the number of cutting elements is equal to the number of actuating elements, and the cutting elements are evenly distributed around the axis of the drive shaft, as are the actuating elements.

[0008] In some embodiments, along the axial direction of the drive shaft, the first mounting member includes a first surface facing the second mounting member and a second surface facing away from the second mounting member, and the second mounting member includes a third surface facing the first mounting member and a fourth surface facing away from the first mounting member. A cutting element is mounted on the first surface, and a toggle element is mounted on the third surface.

[0009] In some embodiments, the second mounting member includes a side panel connecting the third and fourth surfaces, and the toggle member is mounted on the side panel and bent toward the first surface.

[0010] In some embodiments, the cutting element includes a connecting portion and a cutting portion. The connecting portion is connected to the first mounting member. The cutting portion is connected to the connecting portion. At least a portion of the cutting portion protrudes from the first mounting member, and the portion of the cutting portion protruding from the first mounting member is used to cut foreign objects that have entered between the first mounting member and the second mounting member.

[0011] In some embodiments, the connecting portion is detachably connected to the first mounting member.

[0012] In some embodiments, the protruding position of the cutting part on the first mounting member along the drive shaft radially is adjustable.

[0013] In some embodiments, the first mounting member has a first protrusion and a second protrusion, which are radially offset from each other on the drive shaft. The protrusion position of the cutting part on the first mounting member is adjustable such that the connecting part can be selectively fitted to either the first or the second protrusion for adjustment.

[0014] In some embodiments, the first mounting member is provided with a first sliding groove extending radially along the drive shaft. The protruding position of the cutting part on the first mounting member is adjustable so that the connecting part can be slidably adjusted to any position within the first sliding groove. The cutting part includes a first locking part that connects the connecting part and the first mounting member and is used to lock the connecting part in a set position within the first sliding groove.

[0015] In some embodiments, the protective structure includes a first driving member connected to the connecting portion, the first driving member being used to drive the connecting portion to move to different positions within a first sliding groove.

[0016] In some embodiments, the position of the connecting part on the first mounting member along the direction parallel to the drive shaft axis is adjustable.

[0017] In some embodiments, the first mounting member has a first mounting position and a second mounting position, which are offset in the axial direction parallel to the drive shaft. The mounting position of the connecting part on the first mounting member is adjustable so that the connecting part can be selectively mounted at the first mounting position or the second mounting position.

[0018] In some embodiments, the first mounting member is provided with a second sliding groove extending along the axial direction parallel to the drive shaft. The mounting position of the connecting part on the first mounting member is adjustable so that the connecting part can be slidably adjusted to any position within the second sliding groove. The cutting member includes a second locking part that connects the connecting part and the first mounting member and is used to lock the connecting part in a set position within the second sliding groove.

[0019] In some embodiments, the protective structure includes a second driving member connected to the connecting portion, the second driving member being used to drive the connecting portion to move to different positions within the second sliding groove.

[0020] In some embodiments, the protective structure further includes a buffer disposed between the connecting portion and the first mounting portion, which is used to absorb the increased load of the cutting portion.

[0021] In some embodiments, the buffer element surrounds the periphery of the connection portion about the direction parallel to the axis of the drive shaft.

[0022] In some embodiments, the first mounting member is provided with an anti-reverse mounting hole, and the connecting part is adapted to the anti-reverse mounting hole.

[0023] In some embodiments, the extending direction of the cutting portion is parallel to the extending direction of the actuating member.

[0024] In some embodiments, the extending direction of the cutting portion is parallel to the axis of the drive shaft, and the extending direction of the actuating member is also parallel to the axis of the drive shaft.

[0025] In some embodiments, the cutting part has a first cutting edge and a second cutting edge respectively provided on opposite sides of the drive shaft in the circumferential direction. When the actuating member and the cutting member can rotate relative to each other in a first direction, the first cutting edge is used to cut foreign objects; when the actuating member and the cutting member can rotate relative to each other in a second direction, the second cutting edge is used to cut foreign objects. The first direction and the second direction are opposite.

[0026] In some embodiments, the cutting portion has a first surface facing the axis of the drive shaft and a second surface facing away from the first surface, with the two sides of the first surface and the two sides of the second surface respectively used to form a first cutting edge and a second cutting edge.

[0027] In some embodiments, the cutting portion further includes an end remote from the first mounting member, the end having a third cutting edge.

[0028] In some implementations, the third cutting edge transitions smoothly with the first and second cutting edges.

[0029] In some embodiments, the second surface is a curved surface that convexes outward in a direction away from the axis of the drive shaft, and the first surface is a plane or a curved surface that is concave in a direction away from the axis of the drive shaft, or a curved surface that convexes outward toward the drive shaft.

[0030] In some embodiments, the second surface is a plane or a curved surface that is concave in the direction of the drive shaft, and the first surface is a curved surface that is convex in the direction of the drive shaft.

[0031] In some implementations, at least one of the second surface and the first surface is a wavy surface.

[0032] In some embodiments, the first and second cutting edges are provided with a reinforcing layer, which is used to improve the cutting performance of the cutting part.

[0033] In some embodiments, the shape of the first cutting edge is any one of wavy, toothed, continuous curve, or straight line.

[0034] In some embodiments, the shape of the second cutting edge is any one of wavy, toothed, continuous curve, or straight line.

[0035] In some embodiments, the cutting components include a first set of cutting components and a second set of cutting components. The first set of cutting components includes multiple cutting components, the cutting portions of which are arranged around the axis of the first mounting member and distributed on a first circle centered at a reference point on the axis of the first mounting member. The second set of cutting components includes multiple cutting components, the cutting portions of which are arranged around the axis of the first mounting member and distributed on a second circle centered at a reference point on the axis of the first mounting member. The diameter of the second circle is larger than the diameter of the first circle.

[0036] In some embodiments, the second surface of the cutting portion in the first set of cutting members is a curved surface that convexes outward in a direction away from the axis of the drive shaft, and the first surface of the cutting portion in the first set of cutting members is a curved surface that is concave in a direction away from the axis of the drive shaft. The second surface of the cutting portion in the second set of cutting members is a curved surface that convexes outward in a direction away from the axis of the drive shaft, and the first surface of the cutting portion in the second set of cutting members is a curved surface that is concave in a direction away from the axis of the drive shaft.

[0037] In some embodiments, the first surface of the cutting portion in the first set of cutting members is a curved surface that convexes outward toward the axis of the drive shaft, and the second surface of the cutting portion in the first set of cutting members is a curved surface that is concave inward toward the axis of the drive shaft. The second surface of the cutting portion in the second set of cutting members is a curved surface that convexes outward toward the axis of the drive shaft, and the first surface of the cutting portion in the second set of cutting members is a curved surface that is concave inward toward the axis of the drive shaft.

[0038] In some embodiments, the second surface of the cutting portion in the first set of cutting members is a curved surface that convexes outward in a direction away from the axis of the drive shaft, and the first surface of the cutting portion in the first set of cutting members is a curved surface that is concave in a direction away from the axis of the drive shaft; the first surface of the cutting portion in the second set of cutting members is a curved surface that convexes outward in a direction close to the axis of the drive shaft, and the second surface of the cutting portion in the second set of cutting members is a curved surface that is concave in a direction close to the axis of the drive shaft; or,

[0039] The first surface of the cutting portion in the first set of cutting parts is a convex curved surface oriented towards the axis of the drive shaft, and the second surface of the cutting portion in the first set of cutting parts is a concave curved surface oriented towards the axis of the drive shaft. The first surface of the cutting portion in the second set of cutting parts is a convex curved surface oriented towards the axis of the drive shaft, and the second surface of the cutting portion in the second set of cutting parts is a concave curved surface oriented towards the axis of the drive shaft.

[0040] In some embodiments, the cutting elements in the first group of cutting elements are radially offset from the cutting elements in the second group of cutting elements.

[0041] In some implementations, the distance from any one of the cutting elements to the drive shaft is less than the distance from at least one of the toggle elements to the drive shaft.

[0042] In some implementations, the distance from any cutting element to the drive shaft is less than the distance from any toggle element to the drive shaft.

[0043] This application also provides a propulsion device, which includes a propulsion body for outputting propulsion force underwater, a drive shaft, and a protective structure as described in any of the above embodiments. The drive shaft passes through and extends out of the propulsion body. The drive shaft is rotatable relative to the propulsion body. The protective structure is mounted on the drive shaft, and one of the first mounting member and the second mounting member in the protective structure is rotatable with the drive shaft, while the other is fixedly connected to the propulsion body.

[0044] In some embodiments, the propulsion device further includes a propeller fixedly connected to the drive shaft. The propeller includes a hub and blades disposed on the hub, and a protective structure is disposed between the hub and the propulsion body.

[0045] This application also provides a water propulsion device for propelling a waterborne vehicle in water. The water propulsion device includes a fuselage body, a connecting device, and a propulsion device as described in any of the above embodiments. The connecting device is used to connect the fuselage body to the waterborne vehicle. The propulsion device is connected to the fuselage body and is used to output propulsion force.

[0046] This application also provides a water-based mobile device, which includes a water-based carrier and a water-based propulsion device as described in any of the above embodiments, and a connecting device is connected to the water-based carrier.

[0047] In the protective structure, propulsion device, water propulsion unit, and water-mobile device of this application, the first mounting member and the second mounting member are axially opposite to each other and spaced apart from each other, and one of them can rotate with the drive shaft. At least two cutting members are mounted on the surface of the first mounting member near the second mounting member, and at least two actuating members are mounted on the surface of the second mounting member near the first mounting member. When the first mounting member and the second mounting member rotate relative to each other, the actuating members and the cutting members can rotate relative to each other. At this time, the actuating members can actuate foreign objects that have entered between the first mounting member and the second mounting member, so that the foreign objects are close to the cutting members and cut by the cutting members. Since the extension coverage of the cutting members and the extension coverage of the actuating members overlap at least partially in the axial direction of the drive shaft, the actuating members can better cooperate with the cutting members to actuate the foreign objects to move towards the cutting members. Therefore, the foreign objects can be sufficiently shredded into small pieces without getting tangled on the propeller shaft, the propeller can work normally, and the water propulsion unit is less likely to be damaged.

[0048] Additional aspects and advantages of embodiments of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of embodiments of this application. Attached Figure Description

[0049] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, wherein:

[0050] Figure 1 This is a schematic diagram of the planar structure of a water-based mobile device according to some embodiments of this application;

[0051] Figure 2 yes Figure 1 A schematic diagram of the planar structure of the water thruster in a water-based mobile device;

[0052] Figure 3 yes Figure 2 A three-dimensional structural diagram of the propulsion device in the water thruster shown;

[0053] Figure 4 yes Figure 3 The diagram shown is an exploded three-dimensional representation of the propulsion device.

[0054] Figure 5 This is a three-dimensional structural diagram of the cutting module and the toggle module in the protective structure of some embodiments of this application;

[0055] Figure 6This is a cross-sectional schematic diagram of a portion of the structure of a propulsion device according to some embodiments of this application;

[0056] Figure 7 This is a top view of a cutting module according to some embodiments of this application;

[0057] Figure 8 This is a top view of a cutting module according to other embodiments of this application;

[0058] Figure 9 These are partial cross-sectional schematic diagrams of the cutting module at the first mounting position and the second mounting position, representing some embodiments of this application.

[0059] Figure 10 This is a partial cross-sectional schematic diagram of the cutting module according to other embodiments of this application;

[0060] Figure 11 This is a partial cross-sectional schematic diagram of a cutting module and a punching part according to some embodiments of this application;

[0061] Figure 12 This is a schematic cross-sectional view of the cutting portion of some embodiments of this application, cut by a plane perpendicular to the axis of the drive shaft.

[0062] Figure 13 These are top views of a cutting module according to some embodiments of this application and perspective structural diagrams of a cutting module according to other embodiments.

[0063] Figure 14 This is a three-dimensional structural diagram of the toggle module according to other embodiments of this application. Detailed Implementation

[0064] The embodiments of this application are described in detail below. These embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0065] In the description of the embodiments of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0066] A water propulsion device is an electrically driven device that can be integrated with aquatic carriers, offering advantages such as environmental friendliness, low noise, and ease of maintenance. Generally, the propeller in a water propulsion device rotates underwater and pushes water backward. At this time, the water flow velocities at the leading and trailing edges of the propeller are different, creating a pressure difference on both sides. This causes the water propulsion device to experience a force opposite to the direction of water propulsion, and it travels in the direction of this force. However, due to the presence of foreign objects such as fishing lines, nets, aquatic plants, garbage, and silt underwater, these objects may become entangled in the propeller shaft, potentially affecting the normal operation of the propeller and even damaging the water propulsion device. To address this problem, this application provides a protective structure 10 for a water propulsion device 1000. Figures 4 to 6 As shown), propulsion device 100 ( Figure 3 and Figure 4 As shown), water thruster 1000 ( Figure 2 (as shown) and 10,000 water-based mobile devices ( Figure 1 (As shown).

[0067] Please refer to Figure 1 The water-based mobile device 10000 includes a water-based thruster 1000 and a water-based carrier 3000. The water-based thruster 1000 is a detachable power unit. When in use, the water-based thruster 1000 is connected to the water-based carrier 3000, providing power and propelling the water-based carrier 3000 in the water. When not in use, the water-based thruster 1000 can be detached from the water-based carrier 3000 for maintenance and repair.

[0068] For example, the water-based mobile device 10000 in this application can be various boats such as passenger ships and yachts; correspondingly, the water-based carrier 3000 can be a hull, and the water-based propulsion device 1000 can be an outboard motor. For example, the water-based mobile device 10000 can also be a fishing boat, sailboat, or other vessel, without limitation. For example, the water-based propulsion device 1000 can also be a podded propulsion device, a stern engine, or a trolley motor, without limitation. The water-based carrier 3000 can also be a buoy or a rubber buoy, without limitation.

[0069] Please refer to Figure 1 and Figure 2 The water propulsion device 1000 includes a main body 300, a connecting device 500, and a propulsion device 100. The connecting device 500 is used to connect the main body 300 to the water carrier 300. The propulsion device 100 is connected to the main body 300 and is used to output propulsion force.

[0070] Specifically, the fuselage body 300 provides mounting positions for other structures of the water propulsion device 1000. Both the connecting device 500 and the propulsion device 100 are connected to the fuselage body 300. The connecting device 500 is a structure used to connect two or more other components; in this application, the connecting device 500 connects the fuselage body 300 and the water carrier 3000. The connecting device 500 enables the fuselage body 300 to be fixed relative to the water carrier 3000 or to move relative to the water carrier 3000. For example, the connecting device 500 enables the fuselage body 300 to turn and tilt relative to the water carrier 3000. The propulsion device 100 provides propulsion to the water carrier 3000 to move it. The propulsion device 100 includes a propeller 70 (described below), which is placed underwater during use. The propeller 70 of the propulsion device 100 rotates to move the water carrier 3000.

[0071] Please refer to Figure 2 , Figure 3 and Figure 4 The propulsion device 100 is used in the water propulsion device 1000. The propulsion device 100 includes a propulsion body 30 for outputting propulsion force underwater, a drive shaft 50, and a protective structure 10. The drive shaft 50 passes through and extends out of the propulsion body 30. The drive shaft 50 is rotatable relative to the propulsion body 30. The protective structure 10 is mounted on the drive shaft 50. One of the first mounting member 111 and the second mounting member 131 in the protective structure 10 is rotatable with the drive shaft 50, while the other is fixedly connected to the propulsion body 30.

[0072] Specifically, the propulsion body 30 is the structure in the propulsion device 100 that provides the power source. The propulsion device 100 can output different propulsive forces underwater according to the user's control commands. The control commands may include, but are not limited to, start commands, stop commands, acceleration commands, and deceleration commands. The drive shaft 50 extends from the propulsion body 30 and can rotate relative to the propulsion body 30 under the drive of the propulsion body 30. For example, the propulsion device 100 includes a motor, and the motor shaft of the motor is connected to the drive shaft 50 so that the steering torque of the motor is transmitted to the drive shaft 50 and the water-propulsing structure (e.g., a propeller) connected to the drive shaft 50, thereby realizing the movement of the water propulsion device 1000. The protective structure 10 is used to prevent foreign objects such as fishing lines, fishing nets, aquatic plants, garbage, and silt that may exist underwater from seeping into the propulsion body 30 and affecting the normal operation of the propulsion device 100. The protective structure 10 cooperates with the drive shaft 50 and is installed on the drive shaft 50. The first mounting member 111 and the second mounting member 131 in the protective structure 10 move relative to each other to cut foreign objects.

[0073] In some embodiments, the second mounting member 131 is fixedly connected to the drive shaft 50 and can rotate relative to the propulsion body 30 under the drive of the drive shaft 50. The connection between the second mounting member 131 and the drive shaft 50 can be detachable or non-detachable. The first mounting member 111 is fixedly connected to the propulsion body 30, and the connection between the first mounting member 111 and the propulsion body 30 can be detachable or non-detachable. When the second mounting member 131 rotates with the drive shaft 50, the second mounting member 131 rotates relative to the first mounting member 111, and the cutting member 113 and the agitating member 133 (described below) cooperate to agitate foreign objects sandwiched between the first mounting member 111 and the second mounting member 131 into small pieces. Therefore, foreign objects will not become entangled on the propulsion device 100, and the propulsion device 100 can work normally and is not easily damaged.

[0074] In other embodiments, the first mounting member 111 is fixedly connected to the drive shaft 50 and can rotate relative to the propulsion body 30 under the drive of the drive shaft 50. The connection between the first mounting member 111 and the drive shaft 50 can be detachable or non-detachable. Detachable connection includes, but is not limited to, one or more combinations of screw connection and snap-fit ​​connection. Non-detachable connection includes, but is not limited to, one or more combinations of gluing, welding and sintering. The following definitions of detachable and non-detachable connection will not be repeated. The second mounting member 131 is fixedly connected to the propulsion body 30, and the connection between the second mounting member 131 and the propulsion body 30 can be detachable or non-detachable. When the first mounting member 111 rotates with the drive shaft 50, the first mounting member 111 rotates relative to the second mounting member 131, and the cutting member 113 and the actuating member 133 cooperate to cut foreign objects sandwiched between the first mounting member 111 and the second mounting member 131 into small pieces.

[0075] Please refer to Figure 3 and Figure 4 In some embodiments, the propulsion device 100 further includes a propeller 70, which is fixedly connected to the drive shaft 50. The propeller 70 includes a hub 71 and blades 73 disposed on the hub 71. A protective structure 10 is disposed between the hub 71 and the propulsion body 30.

[0076] Specifically, the propeller 70 is a structure that uses rotating blades 73 to push water flow, thereby generating a reaction force to propel the water-based mobile device 10000 forward or turn. The propeller 70 is fixedly mounted on the drive shaft 50 and can rotate relative to the propulsion body 30 under the drive of the drive shaft 50. The hub 71 is the main part of the propeller 70 and is used to connect to the drive shaft 50. There are usually two or more blades 73, which are radially distributed on the hub 71, and the blades 73 and the hub 71 have a certain angle. The water flow impacts the blade surface of the blade 73 at an angle of attack. The path of the water flow over the front of the blade 73 (the side that pushes water, i.e., the back of the blade) becomes longer, the speed increases, and the pressure decreases; while the speed over the back of the blade 73 (the side that draws water, i.e., the blade surface) is relatively slower, and the pressure is higher. The pressure difference generates a forward thrust on the blade 73, and the thrust is transmitted to the water propeller 1000 through the drive shaft 50 and other structures, ultimately propelling the water-based carrier 3000. It is understandable that the pressure difference would also agitate foreign objects from one side of the blades towards the propeller 70. Therefore, with the protective structure 10 positioned between the hub 71 and the propulsion body 30, the protective structure 10, through the relative rotation of the second mounting member 131 and the first mounting member 111, cuts the foreign objects trapped between the second mounting member 131 and the first mounting member 111 due to the pressure difference into smaller pieces. Thus, foreign objects will not become entangled on the rotating propeller shaft of the propeller 70, and the propulsion device 100 can operate normally without being easily damaged.

[0077] Please refer to Figures 4 to 6This application provides a protective structure 10, which is applied to the propulsion device 100 of a water propulsion device 1000. The propulsion device 100 includes a propulsion body 30 and a drive shaft 50 extending from the propulsion body 30. The protective structure 10 includes a first mounting member 111, at least two cutting members 113, a second mounting member 131, and at least two actuating members 133. The first mounting member 111 is connected to the drive shaft 50, and the at least two cutting members 113 are spaced apart from each other on the first mounting member 111. The second mounting member 131 is connected to the drive shaft 50, and the second mounting member 131 and the first mounting member 111 are opposite to each other in the axial direction of the drive shaft 50 and spaced apart from each other. The at least two actuating members 133 are spaced apart from each other on the second mounting member 131. The at least two cutting members 113 are spaced apart from the at least two actuating members 133. One of the first mounting member 111 and the second mounting member 131 can rotate with the drive shaft 50, so that the actuating members 133 and the cutting members 113 can rotate relative to each other. During the relative rotation of the actuating member 133 and the cutting member 113, the actuating member 133 is used to actuate foreign objects that enter between the first mounting member 111 and the second mounting member 131, and the cutting member 113 is used to cut foreign objects that enter between the first mounting member 111 and the second mounting member 131. In the axial direction of the drive shaft 50, the extension coverage of the cutting member 113 and the extension coverage of the actuating member 133 at least partially overlap.

[0078] Specifically, the protective structure 10 includes a cutting module 11 and a toggle module 13. The cutting module 11 includes a first mounting member 111 and at least two cutting members 113. The toggle module 13 includes a second mounting member 131 and at least two toggle members 133.

[0079] More specifically, the cutting module 11 is a module in the protective structure 10 used for cutting foreign objects. The cutting module 11 can cut the object to be cut through a shearing action using a high-strength, sharp structure, such as underwater fishing lines, fishing nets, aquatic plants, garbage, and silt, as described in this application. The first mounting member 111 is the main structure of the cutting module 11, and it provides a mounting position for the cutting member 113. The connection between the first mounting member 111 and the drive shaft 50 can be direct or indirect through other structures (such as bearings). The connection between the first mounting member 111 and the cutting member 113 can be detachable or non-detachable. With the cutting member 113 fixedly connected to the first mounting member 111, the cutting member 113 can cut foreign objects with a large force.

[0080] The cutting element 113 is a structure in the cutting module 11 used to directly contact the object to be cut and cut it through shearing action. The cutting element 113 includes at least one cutting edge (i.e., the first cutting edge 11331, the second cutting edge 11333, and the third cutting edge 11339, mentioned below). The cutting edge can contact the foreign object line or make contact with a smaller contact area surface to fully cut the foreign object. There are at least two cutting elements 113, spaced apart from each other. This allows the cutting elements 113 to cut a larger area of ​​foreign object and may cut the same foreign object more than once to fully sever it.

[0081] The actuating module 13 is a module in the protective structure 10 that cooperates with the cutting module 11. The actuating module 13 can interfere with and actuate foreign objects, bringing them closer to the cutting element 113 for cutting. The second mounting member 131 is the main structure of the actuating module 13, providing a mounting position for the actuating element 133. The connection between the second mounting member 131 and the drive shaft 50 can be direct or indirect via other structures (such as bearings). The connection between the second mounting member 131 and the actuating element 133 can be detachable or non-detachable. The fixed connection between the actuating element 133 and the second mounting member 131 allows the actuating element 133 to actuate foreign objects with a greater force.

[0082] The actuating element 133 is a structure in the actuating module 13 used to directly contact and actuate the object to be cut. Due to the pressure difference generated by the propeller 70, foreign objects may approach the actuating element 133 underwater at a certain speed. At this time, the actuating element 133 can contact the surface of the foreign object with a larger contact area and actuate the foreign object with a larger force. There are at least two actuating elements 133, and each actuating element 133 is spaced apart from each other. At this time, the actuating element 133 can actuate foreign objects over a larger range and may actuate the same foreign object more than once to ensure that the actuating element 133 can sufficiently actuate the foreign object to the vicinity of the cutting element 113, and prevent the foreign object from moving quickly without contacting the actuating element 133 and / or the cutting element 113.

[0083] Along the axial direction of the drive shaft 50, the second mounting member 131 and the first mounting member 111 are opposite to each other and spaced apart. At this time, the surface of the first mounting member 111 connected to the cutting member 113 and the surface of the second mounting member 131 connected to the actuating member 133 are opposite to each other. Therefore, the cutting member 113 and the actuating member 133 are also opposite to each other and spaced apart along the axial direction of the drive shaft 50. Along the axial direction of the drive shaft 50, the cutting member 113 extends toward the second mounting member 131, and the actuating member 133 extends toward the first mounting member 111. In the gap between the first mounting member 111 and the second mounting member 131, the extension coverage of the cutting member 113 corresponds to the range in which the cutting member 113 can cut foreign objects, and the extension coverage of the agitator 133 corresponds to the range in which the agitator 133 can move foreign objects. The part that overlaps with the cutting member 113 in the axial direction of the drive shaft 50 represents the range in which the agitator 133 and the cutting member 113 can act simultaneously. It can be understood that foreign objects in this area can better approach the cutting member 113 and be cut under the agitator 133. The larger the overlap range, the less likely the foreign object is to avoid the agitator 133 and the cutting member 113, and the higher the cutting efficiency of the protective structure 10 for foreign objects.

[0084] In some embodiments, the cutting module 11 can rotate relative to the propulsion body 30 following the drive shaft 50; that is, the first mounting member 111 is fixedly connected to the drive shaft 50 and can rotate under the drive of the drive shaft 50. The actuating module 13 is connected to the propulsion body 30; that is, the second mounting member 131 is movably connected to the drive shaft 50 and does not rotate with the drive shaft 50. When the cutting module 11 rotates with the drive shaft 50, the actuating member 133 rotates relative to the cutting member 113. At this time, the actuating member 133 moves the foreign object located between the cutting module 11 and the actuating module 13 closer to the cutting member 113, and the cutting member 113 cuts the surrounding foreign object into small pieces.

[0085] In other embodiments, the actuating module 13 can rotate relative to the propulsion body 30 following the drive shaft 50; that is, the second mounting member 131 is fixedly connected to the drive shaft 50 and can rotate under the drive of the drive shaft 50. The cutting module 11 is connected to the propulsion body 30; that is, the first mounting member 111 is movably connected to the drive shaft 50 but does not rotate with the drive shaft 50. For example, the first mounting member 111 is connected to the drive shaft 50 via a bearing, with the first mounting member 111 connected to the outer ring of the bearing and the drive shaft 50 connected to the inner ring of the bearing. In this case, the drive shaft 50 can rotate relative to the first mounting member 111, but the first mounting member 111 does not rotate with the drive shaft 50. When the actuating module 13 rotates with the drive shaft 50, the actuating member 133 rotates relative to the cutting member 113. At this time, the actuating member 133 moves the foreign object located between the cutting module 11 and the actuating module 13 closer to the cutting member 113, and the cutting member 113 cuts the surrounding foreign object into small pieces.

[0086] It is understandable that the cutting element 113 can cut the foreign object once or multiple times, especially when the foreign object is long. For example, if the foreign object is a long fishing line, after being cut once, it becomes a small piece. This small piece, driven by the water flow or propelled by the agitator 133, approaches the cutting element 113 again and is further cut into even smaller pieces. The finer the foreign object is ultimately cut, the less impact it may have on the propulsion device 100.

[0087] In the protective structure 10 of this application, the first mounting member 111 and the second mounting member 131 are axially opposite to each other on the drive shaft 50 and spaced apart from each other, and one of them can rotate with the drive shaft 50. At least two cutting members 113 are mounted on the surface of the first mounting member 111 near the second mounting member 131, and at least two actuating members 133 are mounted on the surface of the second mounting member 131 near the first mounting member 111. When the first mounting member 111 and the second mounting member 131 rotate relative to each other, the actuating members 133 and the cutting members 113 can move relative to each other. At this time, the actuating members 133 can actuate foreign objects that have entered between the first mounting member 111 and the second mounting member 131, so that the foreign objects are close to the cutting members 113 and cut by the cutting members 113. Since the extended coverage areas of the cutter 113 and the actuating member 133 overlap at least partially in the axial direction of the drive shaft 50, the actuating member 133 can better cooperate with the cutter 113 to actuate the foreign object to move towards the cutter 113. Therefore, the foreign object can be fully shredded into small pieces without getting tangled on the propeller shaft of the propeller 70, the propeller 70 can work normally, and the water propulsion unit 1000 is less likely to be damaged.

[0088] Please refer to Figure 5 and Figure 6 In some embodiments, at least two cutting elements 113 are evenly distributed around the axis of the drive shaft 50.

[0089] Specifically, taking the axis of the drive shaft 50 as a reference, at least two cutting elements 113 are evenly distributed around the axis on the first mounting member 111. At this time, the distance between each cutting element 113 and the drive shaft 50 is the same, and the distance between each cutting element 113 in the circumferential direction of the drive shaft 50 is also the same. During the cutting process of the cutting elements 113 cutting the foreign object, each cutting element 113 has the same probability of contacting the foreign object, the stress state of each cutting element 113 is relatively consistent, and the structural strength of the cutting module 11 and the stability of the connection with the drive shaft 50 are relatively good. When the first mounting component 111 rotates with the drive shaft 50, the cutting module 11 can maintain dynamic balance, and the centrifugal force on each cutting component 113 is the same. The cutting module 11 can operate stably without shaking. In addition, the uniform distribution of the cutting components 113 can ensure that the load generated during the cutting of foreign objects is evenly distributed on the overall structure of the first mounting component 111, avoiding local stress concentration, thereby improving the structural strength and reliability of the protective structure 10. The protective structure 10 can better perform its protective function, and foreign objects will not affect the normal operation of the propulsion device 100 or damage the propulsion device 100.

[0090] Please refer to Figure 5 and Figure 6 In some embodiments, at least two toggle members 133 are evenly distributed around the axis of the drive shaft 50.

[0091] Specifically, taking the axis of the drive shaft 50 as a reference, at least two actuating elements 133 are evenly distributed around the axis on the second mounting member 131. At this time, the distance between each actuating element 133 and the drive shaft 50 is the same, and the distance between each actuating element 133 in the circumferential direction of the drive shaft 50 is the same. When the second mounting member 131 rotates with the drive shaft 50, the actuating module 13 can maintain dynamic balance, and the centrifugal force on each actuating element 133 is the same. The actuating module 13 can operate stably without shaking. In addition, the even distribution of the actuating elements 133 can ensure that the load generated during the actuation of foreign objects is evenly distributed on the overall structure of the second mounting member 131, avoiding local stress concentration, thereby improving the structural strength and reliability of the protective structure 10. The protective structure 10 can better perform its protective function, and foreign objects will not affect the normal operation of the propulsion device 100 or damage the propulsion device 100.

[0092] Please refer to Figure 5 and Figure 6 In some embodiments, the number of cutting elements 113 is equal to the number of actuating elements 133, the cutting elements 113 are evenly distributed around the axis of the drive shaft 50, and the actuating elements 133 are evenly distributed around the axis of the drive shaft 50.

[0093] Specifically, the number of cutting elements 113 and the number of actuating elements 133 will affect the cutting efficiency of the protective structure 10. When the number of cutting elements 113 is greater than the number of actuating elements 133, the number of cutting elements 113 and actuating elements 133 that can achieve cutting engagement per unit time depends on the number of actuating elements 133. When the number of actuating elements 133 is greater than the number of cutting elements 113, the number of cutting elements 113 and actuating elements 133 that can achieve cutting engagement per unit time depends on the number of cutting elements 113. When the number of cutting elements 113 and the number of actuating elements 133 are equal, the actuating elements 133 can better engage with the cutting elements 113, resulting in higher cutting efficiency of the protective structure 10 and a greater number of cutting elements 113 and actuating elements 133 simultaneously engaging in cutting engagement per unit time. The protective structure 10 can better perform its protective function, and foreign objects will not affect the normal operation of the propulsion device 100 or damage the propulsion device 100.

[0094] The beneficial effects of the uniform distribution of the cutting element 113 around the axis of the drive shaft 50 and the uniform distribution of the toggle element 133 around the axis of the drive shaft 50 are described in the embodiments above and will not be repeated here.

[0095] Therefore, the design of the protective structure 10 is relatively reasonable. The structure of the protective structure 10 is highly reasonable and will not cause mismatch in the working process of each part. In addition, the protective structure 10 has good structural stability and reliability. The protective structure 10 can effectively cut foreign objects that enter it. Foreign objects will not affect the normal operation of the propulsion device 100 or damage the propulsion device 100.

[0096] Please refer to Figure 5 and Figure 6 In some embodiments, along the axial direction of the drive shaft 50, the first mounting member 111 includes a first surface 1111 facing the second mounting member 131 and a second surface 1113 facing away from the second mounting member 131. The second mounting member 131 includes a third surface 1311 facing the first mounting member 111 and a fourth surface 1313 facing away from the first mounting member 111. The cutting member 113 is mounted on the first surface 1111, and the actuating member 133 is mounted on the third surface 1311.

[0097] Specifically, taking the axial direction of the drive shaft 50 as the reference direction, the surface of the first mounting member 111 facing the second mounting member 131 is called the first surface 1111, and the surface of the first mounting member 111 facing away from the second mounting member 131 is called the second surface 1113. The first surface 1111 and the second surface 1113 are opposite to each other. The surface of the second mounting member 131 facing the first mounting member 111 is called the third surface 1311, and the surface of the second mounting member 131 facing away from the first mounting member 111 is called the fourth surface 1313. The third surface 1311 and the fourth surface 1313 are opposite to each other. It can be understood that the first surface 1111 and the third surface 1311 are spaced apart and opposite each other at this time.

[0098] The cutting element 113 is mounted on the first mounting member 111 at the first surface 1111, and the actuating element 133 is mounted on the second mounting member 131 at the third surface 1311. At this position, the cutting element 113 and the actuating element 133 are close in the axial direction of the drive shaft 50, allowing for overlap of the extended coverage areas of the cutting element 113 and the actuating element 133. Therefore, the layout of the protective structure 10 is relatively reasonable, allowing the cutting element 113 and the actuating element 133 to cooperate better. Foreign objects propelled by the actuating element 133 can approach the cutting element 113 with a shorter path, and the cutting element 113 can effectively cut the foreign object. The foreign object will not affect the normal operation of the propulsion device 100 or damage the propulsion device 100.

[0099] Please refer to Figure 5 and Figure 6 In some embodiments, the second mounting member 131 includes a side surface 1315 connecting the third surface 1311 and the fourth surface 1313, and the toggle member 133 is mounted on the side surface 1315 and bent toward the first surface 1111.

[0100] Specifically, side 1315 is the surface on the second mounting member 131 used to connect the third surface 1311 and the fourth surface 1313. When the actuating member 133 is mounted on side 1315, the overall structure of the actuating member 133 has at least one bend, through which the actuating member 133 bends towards the first surface 1111, so that the actuating member 133 can cooperate with the cutting member 113 mounted on the first surface 1111. At this time, the distance between the cutting member 113 and the actuating member 133 in the axial direction of the drive shaft 50 is relatively close, and the extension coverage of the cutting member 113 and the extension coverage of the actuating member 133 can overlap. Therefore, the layout of the protective structure 10 is more reasonable, the cutting member 113 and the actuating member 133 can cooperate better, and foreign objects actuated by the actuating member 133 can approach the cutting member 113 with a shorter path. The cutting member 113 effectively cuts the foreign object, and the foreign object will not affect or damage the propulsion device 100.

[0101] Please refer to Figure 5 and Figure 6 In some embodiments, the cutting member 113 includes a connecting portion 1131 and a cutting portion 1133. The connecting portion 1131 is connected to the first mounting member 111. The cutting portion 1133 is connected to the connecting portion 1131. At least a portion of the cutting portion 1133 protrudes from the first mounting member 111, and the portion of the cutting portion 1133 protruding from the first mounting member 111 is used to cut foreign objects that have entered between the first mounting member 111 and the second mounting member 131.

[0102] Specifically, the connecting part 1131 is a structure in the cutting member 113 used to connect with the first mounting member 111. The connection between the connecting part 1131 and the first mounting member 111 can be either a detachable connection or a non-detachable connection. The cutting part 1133 is a structure in the cutting member 113 capable of cutting foreign objects with a sharp blade. In some embodiments, the cutting part 1133 and the connecting part 1131 are an integral structure. In this case, the cutting member 113 has greater structural strength, can withstand greater shearing force when cutting foreign objects, and has a longer service life. In other embodiments, the cutting part 1133 and the connecting part 1131 are separate structures. In this case, the connection between the cutting part 1133 and the connecting part 1131 can be either a detachable connection or a non-detachable connection.

[0103] The cutting portion 1133 faces the second mounting member 131, and at least a portion of the cutting portion 1133 protrudes from the first surface 1111 of the first mounting member 111 and extends into the gap between the first mounting member 111 and the second mounting member 131. In the axial direction of the drive shaft 50, the extension coverage of the portion of the cutting portion 1133 protruding from the first mounting member 111 at least partially overlaps with the extension coverage of the actuating member 133. The portion of the cutting portion 1133 protruding from the first mounting member 111 is capable of cutting foreign objects that have entered between the first mounting member 111 and the second mounting member 131. Therefore, at least a portion of the cutting portion 1133 protrudes from the first mounting member 111 and extends into the gap between the first mounting member 111 and the second mounting member 131 to effectively cut foreign objects that have entered between the first mounting member 111 and the second mounting member 131, without affecting the normal operation of the propulsion device 100 or damaging the propulsion device 100.

[0104] Please refer to Figure 5 and Figure 6 In some embodiments, the connecting part 1131 is detachably connected to the first mounting member 111.

[0105] Specifically, when the connection between the connecting part 1131 and the first mounting part 111 is detachable, the user can flexibly install the cutting part 113 onto the first mounting part 111 or remove the cutting part 113 from the second mounting part 131. In this case, the user can more easily maintain and repair the cutting module 11. For example, if a cutting part 113 is damaged or severely worn, the user can simply disassemble and maintain that cutting module 11 or directly replace it with a new cutting module 11 at that location, without having to replace the entire cutting module 11. Therefore, the maintenance process of the protective structure 10 is simple and the maintenance cost is low, better meeting the user's needs.

[0106] In some embodiments, the cutting element 113, as will be mentioned below, can change its relative position on the first mounting member 111. The connecting part 1131 is detachably connected to the first mounting member 111. The way the cutting element 113 and the first mounting member 111 change their relative positions is more flexible and diverse, and the protective structure 10 can have richer and more powerful functions.

[0107] Please refer to Figures 5 to 8 In some embodiments, the protruding position of the cutting portion 1133 on the first mounting member 111 along the drive shaft 50 is adjustable.

[0108] Specifically, as described above, one of the cutting module 11 and the actuating module 13 can rotate with the drive shaft 50, so that the actuating element 133 and the cutting element 113 can rotate relative to each other. It can be understood that, with one of the cutting module 11 and the actuating module 13 as a reference, the other rotating relative to that reference allows foreign objects to be cut through the cooperation of the relatively rotating cutting module 11 and the actuating module 13. The operation of the cutting module 11 as the rotating component and the actuating module 13 as the rotating component are basically the same. The following explanation uses the example of the cutting module 11 rotating with the drive shaft 50 and the actuating module 13 being fixed on the propulsion body 30.

[0109] Since the cutting part 1133 is connected to the first mounting member 111 and can rotate with the drive shaft 50 under the drive of the first mounting member 111, when the angular velocity of the drive shaft 50 remains constant, the farther the protruding position of the cutting part 1133 on the first mounting member 111 along the radial direction of the drive shaft 50 is from the drive shaft 50, the greater the rotational linear velocity of the cutting part 113, and the more efficiently the cutting part 113 can cut foreign objects. In addition, when the number and size of the cutting parts 1133 are fixed, the farther the protruding position of the cutting part 1133 on the first mounting member 111 along the radial direction of the drive shaft 50 is from the drive shaft 50, the larger the interval between each cutting part 113, and the less likely foreign objects will get stuck between the cutting parts 113.

[0110] Therefore, with the protruding position of the cutting part 1133 on the first mounting member 111 along the radial direction of the drive shaft 50 adjustable, the user can adjust the cutting part 1133 according to the application scenario of the water propulsion device 1000. For example, when there are many foreign objects such as aquatic plants in the water where the device is navigating, the user can adjust the protruding position of the cutting part 1133 on the first mounting member 111 along the radial direction of the drive shaft 50 to be farther away from the drive shaft 50, so as to avoid foreign objects from getting stuck on the cutting part 113 and to enable the cutting part 113 to effectively cut the foreign objects. The foreign objects will not affect the normal operation of the propulsion device 100 or damage the propulsion device 100.

[0111] Please refer to Figures 5 to 7In some embodiments, the first mounting member 111 has a first protrusion 11111 and a second protrusion 11112, which are radially offset from each other on the drive shaft 50. The protrusion position of the cutting portion 1133 on the first mounting member 111 is adjustable such that the connecting portion 1131 can be selectively fitted to either the first protrusion 11111 or the second protrusion 11112 for adjustment.

[0112] Specifically, the first protrusion 11111 and the second protrusion 11112 are positions on the first mounting member 111 for mounting the connecting portion 1131. In the radial direction of the drive shaft 50, the first protrusion 11111 and the second protrusion 11112 are offset, meaning the distances from the first protrusion 11111 and the second protrusion 11112 to the drive shaft 50 are different. The connecting portion 1131 is detachable from the first mounting member 111 and can be selectively fitted to either the first protrusion 11111 or the second protrusion 11112. In this case, the protruding position of the cutting portion 1133 on the first mounting member 111 is determined by the fitting position of the connecting portion 1131.

[0113] Taking the distance from the first protrusion 11111 to the drive shaft 50 as greater than the distance from the second protrusion 11112 to the drive shaft 50 as an example, the user can adjust the cutting part 1133 according to the application scenario of the water propulsion device 1000. For example, when there are many foreign objects such as aquatic plants in the water, the user can assemble the connecting part 1131 to the first protrusion 11111 so that the protruding position of the cutting part 1133 on the first mounting part 111 along the radial direction of the drive shaft 50 is farther away from the drive shaft 50, so as to avoid foreign objects from jamming the cutting part 113 and to enable the cutting part 113 to effectively cut the foreign objects. Foreign objects will not affect the normal operation of the propulsion device 100 or damage the propulsion device 100.

[0114] Please refer to Figure 5 , Figure 6 and Figure 8 In some embodiments, the first mounting member 111 is provided with a first sliding groove 11113, which extends radially along the drive shaft 50. The protruding position of the cutting portion 1133 on the first mounting member 111 is adjustable such that the connecting portion 1131 can be slidably adjusted to any position in the first sliding groove 11113.

[0115] Specifically, the first sliding groove 11113 is a structure on the first mounting member 111 used to allow the connecting part 1131 to change its mounting position. In the radial direction of the drive shaft 50, the first sliding groove 11113 extends away from the drive shaft 50. The first sliding groove 11113 can be a straight groove or a curved groove; this application does not limit this. The first sliding groove 11113 only needs to satisfy that the radial distances of each region from the drive shaft 50 are not exactly the same. The connecting part 1131 is slidably connected to the first sliding groove 11113. The connecting part 1131 can slide in the first sliding groove 11113 to move closer to or further away from the drive shaft 50, and can be fixed in the first sliding groove 11113 to fix the distance from the drive shaft 50.

[0116] At this time, the protruding position of the cutting part 1133 on the first mounting member 111 is determined by the fixed position of the connecting part 1131 in the first sliding groove 11113. The user can adjust the cutting part 1133 according to the application scenario of the water propulsion device 1000. For example, in waters with many foreign objects such as weeds, the user can slide and fix the connecting part 1131 in the first sliding groove 11113 at a position farther from the drive shaft 50, so that the protruding position of the cutting part 1133 on the first mounting member 111 along the radial direction of the drive shaft 50 is farther from the drive shaft 50, thus preventing foreign objects from jamming the cutting part 113 and allowing the cutting part 113 to effectively cut the foreign objects. Therefore, foreign objects will not affect the normal operation of the propulsion device 100 or damage the propulsion device 100.

[0117] Please refer to Figure 5 , Figure 6 and Figure 8 In some embodiments, the cutting member 113 includes a first locking part 1135, which connects the connecting part 1131 and the first mounting member 111 and locks the connecting part 1131 in a set position of the first sliding groove 11113.

[0118] Specifically, the first locking part 1135 is a structure in the cutting member 113 used to connect the connecting part 1131 and the first mounting member 111. Exemplarily, the connecting part 1131 has a threaded hole, and the first locking part 1135 includes a screw. At least a portion of the first locking part 1135 passes through the threaded hole and is capable of locking the connecting part 1131 in the first sliding groove 11113. The first locking part 1135 can lock the connecting part 1131 in the first sliding groove 11113, thereby fixing the connecting part 1131 in a set position. At this point, the user can adjust the cutting part 1133 according to the application scenario of the water propulsion device 1000. For example, when there are many foreign objects such as aquatic plants in the water where the device is navigating, the user can slide the connecting part 1131 to a position in the first sliding groove 11113 that is far away from the drive shaft 50, and use the first locking part 1135 to fix the connecting part 1131 in this set position. This makes the protruding position of the cutting part 1133 on the first mounting member 111 along the radial direction of the drive shaft 50 far away from the drive shaft 50, so as to avoid foreign objects from jamming the cutting part 113 and to enable the cutting part 113 to effectively cut the foreign objects. Therefore, foreign objects will not affect the normal operation of the propulsion device 100 or damage the propulsion device 100.

[0119] Please refer to Figure 5 , Figure 6 and Figure 8 In some embodiments, the protective structure 10 further includes a first driving member connected to the connecting portion 1131. The first driving member is used to drive the connecting portion 1131 to move to different positions within the first sliding groove 11113.

[0120] Specifically, the first driving member (not shown) is a structure used to drive the connecting part 1131. The first driving member is connected to the connecting part 1131 and can output driving force to drive the connecting part 1131 to move within the first sliding groove 11113. The first driving member can be, but is not limited to, a linear motor or a servo motor. The connection between the connecting part 1131 and the first driving member can be a detachable connection or a non-detachable connection. The connecting part 1131 can move to different positions within the first sliding groove 11113 under the drive of the first driving member and stop to be fixed in that position. At this point, the user can adjust the cutting part 1133 according to the application scenario of the water propulsion device 1000. For example, when there are many foreign objects such as aquatic plants in the water where the device is navigating, the user can control the first drive member to drive the connecting part 1131 to slide and stop in the first sliding groove 11113 at a position far from the drive shaft 50. This makes the protruding position of the cutting part 1133 on the first mounting member 111 along the radial direction of the drive shaft 50 far from the drive shaft 50, so as to avoid foreign objects from jamming the cutting part 113 and to enable the cutting part 113 to effectively cut the foreign objects. Therefore, foreign objects will not affect the normal operation of the propulsion device 100 or damage the propulsion device 100.

[0121] Please refer to Figure 5 , Figure 6 , Figure 9 and Figure 10 In some embodiments, the position of the connecting part 1131 on the first mounting member 111 along the axial direction parallel to the drive shaft 50 is adjustable.

[0122] Specifically, when the structures of the cutting part 1133 and the connecting part 1131 are fixed, and the portion of the cutting part 1133 protruding from the first mounting member 111 is provided with a cutting blade, in the direction parallel to the axis of the drive shaft 50, the closer the connecting part 1131 is to the first surface 1111 of the first mounting member 111, the larger the size of the portion of the cutting part 1133 protruding from the first mounting member 111, and the more the cutting part 1133 extends into the gap between the first mounting member 111 and the second mounting member 131, the more the cutting part 1133 can cut foreign objects over a larger area, and the cutting part 113 can cut foreign objects more efficiently.

[0123] Therefore, with the position of the cutting part 1133 on the first mounting member 111 along the axis of the parallel drive shaft 50 adjustable, the user can adjust the cutting part 1133 according to the application scenario of the water propulsion device 1000. For example, when there are many foreign objects such as aquatic plants in the water where the device is navigating, the user can adjust the position of the cutting part 1133 on the first mounting member 111 along the axis of the parallel drive shaft 50 to be closer to the first surface 1111, so that the cutting part 113 can cut the foreign objects more efficiently, and the foreign objects will not affect the normal operation of the propulsion device 100 or damage the propulsion device 100.

[0124] Please refer to Figure 5 , Figure 6 and Figure 9 In some embodiments, the first mounting member 111 has a first mounting position 11114 and a second mounting position 11115, which are offset in the axial direction parallel to the drive shaft 50. The mounting position of the connecting part 1131 on the first mounting member 111 is adjustable so that the connecting part 1131 can be selectively mounted to either the first mounting position 11114 or the second mounting position 11115.

[0125] Specifically, the first mounting position 11114 and the second mounting position 11115 are positions on the first mounting member 111 for mounting the connecting part 1131. The first mounting position 11114 and the second mounting position 11115 are offset in the axial direction parallel to the drive shaft 50, meaning that the distances of the first mounting position 11114 and the second mounting position 11115 from the first surface 1111 are different. The connecting part 1131 is detachable from the first mounting member 111 and can be selectively assembled to either the first mounting position 11114 or the second mounting position 11115. In this case, the mounting position of the cutting part 1133 on the first mounting member 111 is determined by the assembly position of the connecting part 1131.

[0126] Taking the distance between the first mounting position 11114 and the first surface 1111 as less than the distance between the second mounting position 11115 and the first surface 1111, the user can adjust the cutting part 1133 according to the application scenario of the water propulsion device 1000. For example, when there are many foreign objects such as aquatic plants in the water, the user can assemble the connecting part 1131 to the first mounting position 11114 so that the mounting position of the cutting part 1133 on the first mounting member 111 in the axial direction parallel to the drive shaft 50 is closer to the first surface 1111, so that the cutting part 1133 can cut the foreign objects more efficiently. Therefore, foreign objects will not affect the normal operation of the propulsion device 100 or damage the propulsion device 100.

[0127] Please refer to Figure 5 , Figure 6 and Figure 10 In some embodiments, the first mounting member 111 is provided with a second sliding groove 11116, the second sliding groove 11116 extends along the axial direction of the parallel drive shaft 50, and the mounting position of the connecting part 1131 on the first mounting member 111 is adjustable so that the connecting part 1131 can be slidably adjusted to any position in the second sliding groove 11116.

[0128] Specifically, the second sliding groove 11116 is a structure on the first mounting member 111 used to allow the connecting part 1131 to change its mounting position. In the axial direction parallel to the drive shaft 50, the second sliding groove 11116 extends away from the first surface 1111. The second sliding groove 11116 can be a straight groove or a curved groove; this application does not limit this. The second sliding groove 11116 only needs to satisfy that the distances between each region and the first surface 1111 are not exactly the same. The connecting part 1131 is slidably connected to the second sliding groove 11116. The connecting part 1131 can slide in the second sliding groove 11116 to approach or move away from the first surface 1111, and can be fixed in position in the second sliding groove 11116 to fix its distance from the first surface 1111. At this time, the protruding position of the cutting part 1133 on the first mounting member 111 is determined by the fixed position of the connecting part 1131 in the second sliding groove 11116. At this point, the user can adjust the cutting part 1133 according to the application scenario of the water propulsion device 1000. For example, when there are many foreign objects such as aquatic plants in the water where the device is navigating, the user can slide the connecting part 1131 and fix it in the second sliding groove 11116 at a position closer to the first surface 1111. This makes the installation position of the cutting part 1133 on the first mounting member 111 in the axial direction parallel to the drive shaft 50 closer to the first surface 1111, so that the cutting part 113 can cut the foreign objects more efficiently. Therefore, foreign objects will not affect the normal operation of the propulsion device 100 or damage the propulsion device 100.

[0129] Please refer to Figure 5 , Figure 6 and Figure 10 In some embodiments, the cutting member 113 includes a second locking part 1137, which connects the connecting part 1131 and the first mounting member 111 and locks the connecting part 1131 in a set position of the second sliding groove 11116.

[0130] Specifically, the second locking part 1137 is a structure in the cutting member 113 used to connect the connecting part 1131 and the first mounting member 111. Exemplarily, the connecting part 1131 has a threaded hole, and the second locking part 1137 includes a screw. At least a portion of the second locking part 1137 passes through the threaded hole and is capable of locking the connecting part 1131 in the first sliding groove 11113. The second locking part 1137 can lock the connecting part 1131 in the first sliding groove 11113, thereby fixing the connecting part 1131 in a set position. At this point, the user can adjust the cutting part 1133 according to the application scenario of the water propulsion device 1000. For example, when there are many foreign objects such as aquatic plants in the water where the device is navigating, the user can slide the connecting part 1131 to a position closer to the first surface 1111 in the first sliding groove 11113, and use the second locking part 1137 to fix the connecting part 1131 in this set position. This makes the installation position of the cutting part 1133 on the first mounting member 111 in the axial direction parallel to the drive shaft 50 closer to the first surface 1111, so that the cutting part 113 can cut foreign objects more efficiently. Therefore, foreign objects will not affect the normal operation of the propulsion device 100 or damage the propulsion device 100.

[0131] Please refer to Figure 5 , Figure 6 and Figure 10 In some embodiments, the protective structure 10 includes a second driving member connected to the connecting portion 1131. The second driving member is used to drive the connecting portion 1131 to move to different positions within the second sliding groove 11116.

[0132] Specifically, the second driving member (not shown) is a structure used to drive the connecting part 1131. The second driving member is connected to the connecting part 1131 and can output driving force to drive the connecting part 1131 to move within the second sliding groove 11116. The second driving member can be, but is not limited to, a linear motor or a servo motor. The connection between the connecting part 1131 and the second driving member can be either detachable or non-detachable. The connecting part 1131 can move to different positions within the first sliding groove 11113 under the drive of the second driving member and then stop to be fixed in that position.

[0133] At this point, the user can adjust the cutting part 1133 according to the application scenario of the water propulsion device 1000. For example, when there are many foreign objects such as aquatic plants in the water where the device is navigating, the user can control the second drive member to drive the connecting part 1131 to slide and stop in the first sliding groove 11113 at a position closer to the first surface 1111. This makes the installation position of the cutting part 1133 on the first mounting member 111 in the axial direction parallel to the drive shaft 50 closer to the first surface 1111, so that the cutting part 113 can cut the foreign objects more efficiently. Therefore, foreign objects will not affect the normal operation of the propulsion device 100 or damage the propulsion device 100.

[0134] Please refer to Figure 5 , Figure 6 and Figure 11 In some embodiments, the protective structure 10 further includes a buffer 15 disposed between the connecting portion 1131 and the first mounting member 111, and is used to absorb the increased load of the cutting portion 1133.

[0135] Specifically, when the cutting part 1133 is not cutting the foreign object, the load borne by the cutting part 1133 is the load under the action of the cutting part 1133 and water during rotation. Since the cutting part 1133 will act on the foreign object with a certain force during the cutting process, the load borne by the cutting part 1133 increases. The load is transmitted to the connecting part 1131 through the connection between the cutting part 1133 and the connecting part 1131, and further transmitted to the joint position between the connecting part 1131 and the first mounting member 111. At this time, the increased load may reduce the connection strength between the connecting part 1131 and the first mounting member 111, and cause the cutting part 113 to shake or even fall off.

[0136] The buffer 15 is a structure used to absorb the increased load from the cutting section 1133. Since the main application of the protective structure 10 is underwater, the buffer 15 is designed with good waterproofing, corrosion resistance, and stability. The buffer 15 can be, but is not limited to, polyurethane rubber, nitrile rubber, silicone rubber, or fluororubber. The buffer 15 is sandwiched between the connecting part 1131 and the first mounting part 111 to fully absorb the increased load from the cutting section 1133. Therefore, the connection reliability between the connecting part 1131 and the first mounting part 111 is not affected, the cutting module 11 has good structural stability, and the cutting module 11 can simultaneously cut foreign objects with greater shearing force and have a longer service life.

[0137] Please refer to Figure 5 , Figure 6 and Figure 11 In some embodiments, the buffer 15 surrounds the connecting portion 1131 around the axis of the parallel drive shaft 50.

[0138] Specifically, during the cutting process of the cutting module 11, the cutting element 113 moves relative to the foreign object. The trajectory of the foreign object is complex, and it usually rotates relative to the cutting element 113. At this time, all sides of the cutting part 1133 may come into contact with the foreign object and bear a large load. When the buffer element 15 surrounds the connecting part 1131 around the axis of the parallel drive shaft 50, the buffer element 15 is sandwiched between the outer wall of the connecting part 1131 in any direction and the first mounting element 111. Therefore, when the foreign object acts on the cutting part 1133 in any direction, the buffer element 15 can effectively absorb the increased load of the cutting part 1133. The connection reliability between the connecting part 1131 and the first mounting element 111 is higher, the structural stability of the cutting module 11 is better, and the cutting module 11 can both cut foreign objects with greater shearing force and have a longer service life.

[0139] Please refer to Figures 5 to 8 ,and Figure 13 In some embodiments, the first mounting member 111 is provided with an anti-reverse mounting hole 11117, and the connecting part 1131 is adapted to the anti-reverse mounting hole 11117.

[0140] Specifically, in the above embodiment, the anti-reverse mounting hole 11117 is a structure used to achieve alignment and error prevention functions. Please refer to... Figure 5 The cross-section of the inner contour of the anti-reverse mounting hole 11117 is a non-centrally symmetrical figure, meaning that the shape of the anti-reverse mounting hole 11117 is not completely consistent when viewed from the front, back, left, and right sides. The shape and size of the outer contour of the connecting part 1131 correspond to the shape and size of the inner contour of the anti-reverse mounting hole 11117. In this case, the connecting part 1131 can be fitted with the anti-reverse mounting hole 11117 in a unique way, that is, the connecting part 1131 is adapted to the anti-reverse mounting hole 11117. Therefore, in the cutting module 11 of this application, the first mounting member 111 is provided with the anti-reverse mounting hole 11117 to have a foolproof function, and the connection process between the connecting part 1131 and the first mounting member 111 is simpler and more accurate.

[0141] Please refer to Figure 5 , Figure 6 and Figure 11 In some embodiments, the extending direction of the cutting portion 1133 is parallel to the extending direction of the actuating member 133.

[0142] Specifically, the cutting part 1133 extends from the first mounting member 111 to the second mounting member 131, and the actuating member 133 extends from the second mounting member 131 to the first mounting member 111, with the two extending directions parallel. In this case, the cutting part 1133 and the actuating member 133 will not interfere with each other during relative rotation. The main direction of the force exerted by the actuating member 133 on the foreign object is perpendicular to the extending direction of the actuating member 133. The foreign object can approach the cutting part 1133 at a direction approximately perpendicular to the cutting part 1133 for at least a period of time. At this time, the direction of movement of the foreign object relative to the cutting part 1133 is perpendicular to or at a large angle to the extending direction of the cutting part 1133. Therefore, the blade of the cutting part 1133 can more effectively cut the foreign object into small pieces. Thus, the foreign object will not become entangled on the pushing device 100, and the pushing device 100 can operate normally and is less prone to damage.

[0143] Please refer to Figure 5 , Figure 6 and Figure 11 In some embodiments, the extending direction of the cutting portion 1133 is parallel to the axis of the drive shaft 50, and the extending direction of the actuating member 133 is parallel to the axis of the drive shaft 50.

[0144] Specifically, with the extension direction of the cutting section 1133 parallel to the extension direction of the actuating member 133 and simultaneously parallel to the axis of the drive shaft 50, the structure of the cutting section 1133 and the actuating member 133 is relatively compact. The cutting section 1133 can perform close-range, high-efficiency cutting in the core areas of the drive shaft 50 and propeller 70, where foreign objects are prone to entanglement. The movement direction of the foreign object under the action of the actuating member 133, and the movement direction of the foreign object after being cut, are both perpendicular to the direction of the drive shaft 50 or at a large angle. The foreign objects before and after being cut by the cutting member 113 are unlikely to interfere with the drive shaft 50 and propeller 70. In addition, the direction of water agitation by the cutting section 1133 and the actuating member 133 is adapted to the direction of the drive shaft 50. The working process of the cutting member 1133 and the actuating member 133 will not interfere with the movement of the water propeller 1000, and the movement trajectory of the water propeller 1000 can be controlled more precisely.

[0145] Therefore, when the extension direction of the cutting part 1133, the extension direction of the actuating member 133, and the axis of the drive shaft 50 are all parallel, the protective structure 10 can effectively cut foreign objects, the propulsion device 100 can work normally, and the user has a better sense of control over the water-based mobile device 10000.

[0146] Please refer to Figure 5 and Figure 6In some embodiments, the cutting part 1133 has a first cutting edge 11331 and a second cutting edge 11333 on opposite sides of the drive shaft 50 in the circumferential direction. During the relative rotation of the actuating member 133 and the cutting member 113 along a first direction X1, the first cutting edge 11331 cuts foreign objects. During the relative rotation of the actuating member 133 and the cutting member 113 along a second direction X2, the second cutting edge 11333 cuts foreign objects. The first direction X1 and the second direction X2 are opposite.

[0147] Specifically, the first cutting edge 11331 and the second cutting edge 11333 are structures on the cutting section 1133 used to achieve the cutting function. The first cutting edge 11331 and the second cutting edge 11333 can contact the foreign object line or make contact with a small contact area surface to cut the foreign object by shearing force. In the circumferential direction of the drive shaft 50, the cutting section 1133 includes two opposing sides, each side is provided with a corresponding cutting edge, that is, the first cutting edge 11331 and the second cutting edge 11333 are opposite to each other in the circumferential direction of the drive shaft 50, and the shapes of the first cutting edge 11331 and the second cutting edge 11333 can be the same or different. During the forward and backward movement of the water propeller 1000, the drive shaft 50 drives the propeller 70 to rotate in different rotation directions, therefore, the relative rotation direction of the cutting module 11 and the toggle module 13 changes accordingly.

[0148] For example, the cutting member 113 rotates clockwise relative to the actuating member 133 in the first direction X1, and rotates counterclockwise relative to the actuating member 133 in the second direction X2. During the rotation of the cutting member 113 relative to the actuating member 133 along the first direction X1, the first cutting edge 11331 cuts in the rotation direction along the first direction X1 to cut foreign objects located in the rotation path. During the rotation of the cutting member 113 relative to the actuating member 133 along the second direction X2, the second cutting edge 11333 cuts in the rotation direction along the second direction X2 to cut foreign objects located in the rotation path. It is understood that when the cutting member 113 rotates counterclockwise relative to the actuating member 133 in the first direction X1 and clockwise relative to the actuating member 133 in the second direction X2, the cutting process corresponds to the above process, and this application does not limit the first direction X1 and the second direction X2.

[0149] Therefore, even when the cutting module 11 and the toggle module 13 rotate relative to each other in any direction, the cutting part 1133 can cut the foreign object. The protective structure 10 can effectively cut the foreign object in various working states of the water propulsion device 1000. The foreign object will not get tangled on the propulsion device 100, and the propulsion device 100 can work normally.

[0150] Please refer to Figure 5 and Figure 6In some embodiments, the cutting portion 1133 has a first surface 11335 facing the axis of the drive shaft 50 and a second surface 11337 facing away from the first surface 11335. The two sides of the first surface 11335 and the two sides of the second surface 11337 are respectively used to form a first cutting edge 11331 and a second cutting edge 11333.

[0151] Specifically, taking the axis of the drive shaft 50 as a reference, the surface of the cutting part 1133 facing the axis is the first surface 11335, and the surface of the cutting part 1133 away from the axis is the second surface 11337. The first surface 11335 and the second surface 11337 are opposite to each other and connected to each other from their respective sides. In the circumferential direction of the drive shaft 50, the two sides of the first surface 11335 are connected to the two sides of the second surface 11337 respectively, and the two edges formed at the connection between the first surface 11335 and the second surface 11337 are the first cutting edge 11331 and the second cutting edge 11333. Therefore, the cutting part 1133 forms a first blade 11331 and a second blade 11333 through the interconnected first surface 11335 and second surface 11337. The cutting part 1133 has a simple structure and good continuity. The cutting part 1133 can withstand a greater load during the cutting of foreign objects. The cutting part 113 has strong structural strength and cutting ability. The protective structure 10 can effectively cut foreign objects. Foreign objects will not get tangled on the propulsion device 100. The propulsion device 100 can work normally.

[0152] Please refer to Figure 5 , Figure 6 and Figure 13 In some embodiments, the second surface 11337 is a curved surface that convexes outward in a direction away from the axis of the drive shaft 50, and the first surface 11335 is a plane or a curved surface that is concave in a direction away from the axis of the drive shaft 50, or a curved surface that convexes outward toward the drive shaft 50.

[0153] Specifically, when the second surface 11337 is curved and protrudes outward in a direction away from the axis of the drive shaft 50, the cutting part 1133 is a convex streamline on the side away from the axis. The second surface 11337 helps the cutting part 1133 to smoothly split the water flow, reduce the resistance during rotation, and thus reduce energy loss.

[0154] In some embodiments, the first surface 11335 is a plane, in which case the first surface 11335 and the second surface 11337 cooperate so that the shape of the cutting portion 1133 cut by the plane perpendicular to the axial direction of the drive shaft 50 is arc-shaped, such as... Figure 13As shown in A1. At this time, at the connection between the first surface 11335 and the second surface 11337, the included angle between the first surface 11335 and the second surface 11337 is very small, and the first cutting edge 11331 and the second cutting edge 11333 are relatively sharp to effectively cut the foreign object.

[0155] In other embodiments, the first surface 11335 is a concave curved surface in a direction away from the axis of the drive shaft 50. In this case, the first surface 11335 and the second surface 11337 cooperate so that the shape of the cut portion 1133 cut by the plane perpendicular to the axis of the drive shaft 50 is crescent-shaped, such as... Figure 13 As shown in A2. At this time, the first surface 11335 can push the foreign object to move in the direction of the drive shaft 50, and the cutting part 1133 can better capture the foreign object and cut it multiple times.

[0156] In some other embodiments, the first surface 11335 is a curved surface that convexes towards the drive shaft 50. In this case, the first surface 11335 and the second surface 11337 cooperate so that the shape of the cutting portion 1133 cut by the plane perpendicular to the axial direction of the drive shaft 50 is spindle-shaped. Figure 13 As shown in A3. At this time, the cutting part 1133 is also a convex streamline shape on the side near the axis. The first surface 11335 and the second surface 11337 cooperate with each other to more smoothly split the water flow, further reduce the resistance during rotation, and reduce energy loss.

[0157] Please refer to Figure 5 , Figure 6 and Figure 13 In some embodiments, the second surface 11337 is a plane or a curved surface that is concave in the direction of the drive shaft 50, and the first surface 11335 is a curved surface that is convex in the direction of the drive shaft 50.

[0158] Specifically, when the second surface 11337 is a plane and the first surface 11335 is a curved surface convex outward toward the drive shaft 50, the first surface 11335 and the second surface 11337 cooperate to make the shape of the cutting portion 1133 cut by the plane perpendicular to the axis of the drive shaft 50 be arc-shaped, such as... Figure 13 As shown in B1. At this point, at the junction of the first surface 11335 and the second surface 11337, the angle between the first surface 11335 and the second surface 11337 is very small, and the first cutting edge 11331 and the second cutting edge 11333 are relatively sharp to effectively cut foreign objects. Moreover, the cutting part 1133 has a convex streamline shape on the side near the axis, the first surface 11335 can more smoothly split the water flow, the resistance when the cutting part 113 rotates is small, and the energy loss is low.

[0159] When the second surface 11337 is a concave curved surface towards the drive shaft 50, and the first surface 11335 is a convex curved surface towards the drive shaft 50, the first surface 11335 and the second surface 11337 cooperate to make the shape of the cutting portion 1133 cut by the plane perpendicular to the axis of the drive shaft 50 crescent-shaped, such as... Figure 13 As shown in B2. At this time, the concave surface of the second surface 11337 also provides a temporary space for the cut foreign object fragments. Under the action of centrifugal force, the foreign object fragments can be easily thrown out from the concave surface, avoiding the cutting part 1133 from being blocked by the cut foreign object and causing a decrease in cutting efficiency. The cutting part 113 can effectively cut the foreign object to ensure the normal operation of the protective structure 10.

[0160] Please refer to Figure 5 , Figure 6 and Figure 13 In some embodiments, at least one of the second surface 11337 and the first surface 11335 is a wavy surface.

[0161] Specifically, when at least one of the second surface 11337 and the first surface 11335 is a wavy curved surface, at least a portion of the shape of the first cutting edge 11331 and the second cutting edge 11333 is wavy (not shown). The wavy cutting edge can cut foreign objects intermittently and decompose the continuous cutting action into a high-frequency "engagement-release" cycle, making it less likely for foreign objects to slip relative to the cutting part 1133 during the cutting process. Furthermore, the contact area between the first cutting edge 11331 and the second cutting edge 11333 and the foreign object is reduced, resulting in higher pressure on the cutting point of the foreign object by the first cutting edge 11331 and the second cutting edge 11333 during cutting, allowing the cutting element 113 to cut the foreign object more effectively. Therefore, having at least one of the second surface 11337 and the first surface 11335 as a wavy curved surface can improve the cutting ability of the first blade 11331 and the second blade 11333 on foreign objects, enhance the cutting ability of the cutting component 113, enable the protective structure 10 to cut foreign objects more effectively, prevent foreign objects from getting tangled on the propulsion device 100, and enable the propulsion device 100 to work normally.

[0162] Please refer to Figures 5 to 7 In some embodiments, the cutting portion 1133 also includes an end portion away from the first mounting member 111, and the end portion is provided with a third cutting edge 11339.

[0163] Specifically, the third blade 11339 is a structure in the cutting section 1133 used to further supplement the cutting process of the first blade 11331 and the second blade 11333. The cutting section 1133 is located at least part of the area furthest from the first mounting member 111, which is the end point, and the third blade 11339 is positioned at the end point. During the process of the cutting member 113 cutting foreign objects entering the cutting module 11 and the agitation module 13 by the first blade 11331 and the second blade 11333, the first blade 11331 and the second blade 11333 mainly cut foreign objects located on the rotation trajectory of the cutting section 1133. At this time, foreign objects near the end point (including uncut foreign objects, or foreign objects with a large overall volume that have been cut less times by the first blade 11331 and the second blade 11333) may not be cut. Therefore, with the third blade 11339 provided at the end, foreign objects near the end can be cut by the third blade 11339, the cutting range of the cutting element 113 is increased, the protective structure 10 can cut foreign objects more effectively, the foreign objects can be fully cut without getting tangled on the propulsion device 100, and the propulsion device 100 can work normally.

[0164] Please refer to Figure 5 and Figure 6 In some embodiments, the third cutting edge 11339 transitions smoothly with the first cutting edge 11331 and the second cutting edge 11333.

[0165] Specifically, when the third blade 11339 smoothly transitions to the first blade 11331 and the second blade 11333 respectively, foreign objects near the connection between the third blade 11339 and the first blade 11331 or the connection between the third blade 11339 and the second blade 11333 can move smoothly toward the third blade 11339, the first blade 11331 or the second blade 11333 and be cut, without getting stuck at the connection and further causing the cutting module 11 to jam. Therefore, the cutting component 113 can smoothly cut the debris located in various positions, and the foreign objects will not jam the cutting module 11 or get tangled on the pushing device 100, so the pushing device 100 can work normally.

[0166] Please refer to Figure 5 and Figure 6 In some embodiments, the first cutting edge 11331 and the second cutting edge 11333 are provided with a reinforcing layer, which is used to improve the cutting performance of the cutting part 1133.

[0167] Specifically, the reinforcing layer (not shown) is a structure disposed on the surface of the cutting section 1133 to improve its cutting performance. The reinforcing layer covers the substrate of the cutting section 1133 and is disposed at least at the positions corresponding to the first cutting edge 11331 and the second cutting edge 11333. The material of the reinforcing layer can be, but is not limited to, one or more combinations of polycrystalline diamond (PCD), diamond-based coatings, cubic boron nitride (cBN), high-performance ceramic coatings (titanium nitride, aluminum titanium nitride, alumina), tungsten carbide (WC) based cemented carbide, etc. The reinforcing layer can be a single-layer structure or a multi-layer composite structure. The presence of the reinforcing layer makes the cutting section 1133 stronger and sharper, enabling the first cutting edge 11331 and the second cutting edge 11333 to cut foreign objects more efficiently. Foreign objects will not become entangled on the propulsion device 100, ensuring the propulsion device 100 can operate normally and is less prone to damage.

[0168] In addition, the reinforcing layer with a specific material, such as polycrystalline diamond (PCD), can significantly improve the reliability and service life of the cutting part 113, giving the cutting part 113 stronger corrosion resistance and electrochemical stability. The protective device can better cope with various water areas, especially non-freshwater water areas, and the protective structure 10 reduces the maintenance cost and tool replacement frequency in the long term.

[0169] Please refer to Figure 5 and Figure 6 In some embodiments, the shape of the first cutting edge 11331 can be any one of wavy, toothed, continuous curve, or straight line.

[0170] Specifically, in this embodiment, the first blade 11331 is wavy. As mentioned in the above embodiment, at least one of the second surface 11337 and the first surface 11335 is a wavy curved surface, which will not be explained again here.

[0171] When the cutting member 113 rotates relative to the actuating member 133 along the first direction X1, and the first blade 11331 is toothed, the toothed blade can cut the foreign object intermittently, decomposing the continuous cutting action into a high-frequency "engagement-release" cycle, making it less likely for the foreign object to slip relative to the cutting part 1133 during the cutting process. Furthermore, the contact area between the first blade 11331 and the foreign object is reduced, especially at the junctions of the teeth. Therefore, the pressure exerted by the first blade 11331 on the cutting point of the foreign object is higher during cutting, allowing the cutting member 113 to cut the foreign object more effectively. Thus, when the first blade 11331 is toothed, its cutting ability against foreign objects is effectively improved, the cutting ability of the cutting member 113 is enhanced, the protective structure 10 can cut foreign objects more effectively, foreign objects will not become entangled on the propulsion device 100, and the propulsion device 100 can operate normally.

[0172] When the cutting member 113 rotates relative to the actuating member 133 along the first direction X1, and the shape of the first blade 11331 is a continuous curve, the contact angle of the first blade 11331 changes continuously during contact with the foreign object. During the cutting process of the foreign object by the first blade 11331, the shearing force on the foreign object has a component perpendicular to the contact direction. The cutting process is more like "slicing" rather than "breaking". The cutting part 1133 can better deal with foreign objects with high flexibility such as aquatic plants, and the cutting process is more labor-saving. Therefore, when the shape of the first blade 11331 is a continuous curve, the cutting ability of the first blade 11331 on foreign objects is effectively improved, especially suitable for foreign objects with high flexibility. The protective structure 10 can cut foreign objects more effectively and labor-savingly, and the foreign object will not get tangled on the propulsion device 100, so the propulsion device 100 can work normally.

[0173] When the cutting component 113 rotates relative to the actuating component 133 along the first direction X1, and the shape of the first blade 11331 is a straight line, the structure of the first blade 11331 is simple and easy to maintain. Furthermore, the contact angle remains essentially constant during the contact between the first blade 11331 and the foreign object, allowing the first blade 11331 to apply force directly to the foreign object, generating a large instantaneous impact force. The cutting process is more like a "chopping" motion, and the cutting part 1133 can better handle foreign objects with high structural strength, such as aquatic plant stems and woody plants. Therefore, when the shape of the first blade 11331 is a continuous curve, the cutting ability of the first blade 11331 against foreign objects is effectively improved, especially suitable for foreign objects with high structural strength. The protective structure 10 can cut foreign objects more effectively and forcefully, and the foreign object will not affect the propulsion device 100, allowing the propulsion device 100 to operate normally.

[0174] The structure of the second blade 11333 is basically the same as that of the first blade 11331 in terms of structure and formation. The difference is that the second blade 11333 cuts the foreign object during the rotation of the cutting member 113 relative to the actuating member 133 in the second direction X2. Therefore, the beneficial effects of the shape of the second blade 11333 being wavy, toothed, continuous curve, or straight are described above. Please refer to the beneficial effects of the shape of the first blade 11331 being wavy, toothed, continuous curve, or straight for the above-mentioned beneficial effects. They will not be described in detail here.

[0175] Please refer to Figure 5 , Figure 6 and Figure 13In some embodiments, the cutting element 113 includes a first set of cutting elements 11301 and a second set of cutting elements 11303. The first set of cutting elements 11301 includes a plurality of cutting elements 113, and the cutting portions 1133 of the first set of cutting elements 11301 are arranged around the axis of the first mounting member 111 and distributed on a first circle O1 centered at a reference point on the axis of the first mounting member 111. The second set of cutting elements 11303 includes a plurality of cutting elements 113, and the cutting portions 1133 of the second set of cutting elements 11303 are arranged around the axis of the first mounting member 111 and distributed on a second circle O2 centered at a reference point on the axis of the first mounting member 111. The diameter of the second circle O2 is larger than the diameter of the first circle O1.

[0176] Specifically, when there are multiple cutting pieces 113, at least multiple cutting pieces 113 together form a first group of cutting pieces 11301. In addition, at least multiple cutting pieces 113 together form a second group of cutting pieces 113.

[0177] At this time, in the first group of cutting parts 11301, each cutting portion 1133 is evenly distributed around the axis of the first mounting member 111, and the distance between each cutting part 113 and the axis of the first mounting member 111 is the same. Taking the reference point on the axis of the first mounting member 111 as the center and the distance between each cutting part 113 and the axis of the first mounting member 111 as the radius, a virtual auxiliary circle, namely the first circle O1, is drawn. Then, each cutting portion 1133 in the first group of cutting parts 11301 is distributed on the first circle O1.

[0178] In the second group of cutting parts 11303, each cutting portion 1133 is evenly distributed around the axis of the first mounting member 111, and the distance between each cutting part 113 and the axis of the first mounting member 111 is the same. Taking the reference point on the axis of the first mounting member 111 as the center and the distance between each cutting part 113 and the axis of the first mounting member 111 as the radius, a virtual auxiliary circle, namely the second circle O2, is drawn. Then, each cutting portion 1133 in the second group of cutting parts 11303 is distributed on the second circle O2.

[0179] When the diameter of the second circle O2 is larger than the diameter of the first circle O1, the cutting portions 1133 in the first set of cutting members 11301 and the cutting portions 1133 in the second set of cutting members 11303 are radially offset from the first mounting member 111, and the cutting portions 1133 in the first set of cutting members 11301 are closer to the axis of the first mounting member 111 than the cutting portions 1133 in the second set of cutting members 11303. Therefore, the first set of cutting members 11301 and the second set of cutting members 11303 can cooperate with each other to cut the foreign objects entering between the cutting module 11 and the actuating module 13. The probability and number of times the foreign objects are cut increase, the cutting ability of the cutting module 11 to cut foreign objects is effectively improved, the protective structure 10 can cut foreign objects more effectively and forcefully, the foreign objects will not affect the propulsion device 100, and the propulsion device 100 can work normally.

[0180] Please refer to Figure 5 , Figure 6 and Figure 13 In some embodiments, the second surface 11337 of the cutting portion 1133 in the first set of cutting members 11301 is a curved surface that convexes outward in a direction away from the axis of the drive shaft 50, and the first surface 11335 of the cutting portion 1133 in the first set of cutting members 11301 is a curved surface that is concave in a direction away from the axis of the drive shaft 50. The second surface 11337 of the cutting portion 1133 in the second set of cutting members 11303 is a curved surface that convexes outward in a direction away from the axis of the drive shaft 50, and the first surface 11335 of the cutting portion 1133 in the second set of cutting members 11303 is a curved surface that is concave in a direction away from the axis of the drive shaft 50.

[0181] Specifically, in the above embodiment, the concave surfaces of the cutting portions 1133 in the first set of cutting members 11301 and the second set of cutting members 11303 both face the axis of the drive shaft 50. The first set of cutting members 11301 and the second set of cutting members 11303 cooperate to form a "focused capture area" that can effectively capture foreign objects. At this time, foreign objects entering from any direction of the protective structure 10 can first be guided and pushed inward by the first surface 11335 of the cutting portion 1133 in the second set of cutting members 11303. When the foreign object approaches the first surface 11335 of the cutting portion 1133 in the first set of cutting members 11301, the foreign object can be captured again and guided towards the drive shaft 50. Therefore, foreign objects can remain between the cutting module 11 and the toggle module 13 for a long time, and be repeatedly cut by the cooperation of the first set of cutting parts 11301 and the second set of cutting parts 11303. The protective structure 10 can cut the foreign objects into smaller sizes, and the foreign objects will not affect the propulsion device 100, so the propulsion device 100 can work normally.

[0182] Please refer to Figure 5 , Figure 6 and Figure 13 In some embodiments, the first surface 11335 of the cutting portion 1133 in the first set of cutting members 11301 is a curved surface that convexes outward in the direction close to the axis of the drive shaft 50, the second surface 11337 of the cutting portion 1133 in the first set of cutting members 11301 is a curved surface that is concave in the direction close to the axis of the drive shaft 50, the second surface 11337 of the cutting portion 1133 in the second set of cutting members 11303 is a curved surface that convexes outward in the direction away from the axis of the drive shaft 50, and the first surface 11335 of the cutting portion 1133 in the second set of cutting members 11303 is a curved surface that is concave in the direction away from the axis of the drive shaft 50.

[0183] Specifically, in the above embodiment, the concave surface of the cutting portion 1133 in the second set of cutting members 11303 faces the axis of the drive shaft 50, while the concave surfaces of the cutting portions 1133 in the first set of cutting members 11301 all face away from the axis of the drive shaft 50. At this time, the first set of cutting members 11301 and the second set of cutting members 11303 cooperate to form a "counter-attack capture area" that can effectively capture foreign objects. At this time, foreign objects entering from any direction of the protective structure 10 can first be guided and pushed inward by the first surface 11335 of the cutting portion 1133 in the second set of cutting members 11303. When the foreign object approaches the second surface 11337 of the cutting portion 1133 in the first set of cutting members 11301, the foreign object is subjected to a large shearing force from the cutting portion 1133 in the first set of cutting members 11301. Therefore, under the guidance of the second set of cutting elements 11303, the foreign object can cooperate with the first set of cutting elements 11301 with a large force. Thus, the protective structure 10 can cut the foreign object with a large force, and the foreign object will not affect the propulsion device 100, so the propulsion device 100 can work normally.

[0184] Please refer to Figure 5 , Figure 6 and Figure 13 In some embodiments, the second surface 11337 of the cutting portion 1133 in the first set of cutting members 11301 is a curved surface that convexes outward in a direction away from the axis of the drive shaft 50, and the first surface 11335 of the cutting portion 1133 in the first set of cutting members 11301 is a curved surface that is concave in a direction away from the axis of the drive shaft 50. The first surface 11335 of the cutting portion 1133 in the second set of cutting members 11303 is a curved surface that convexes outward in a direction close to the axis of the drive shaft 50, and the second surface 11337 of the cutting portion 1133 in the second set of cutting members 11303 is a curved surface that is concave in a direction close to the axis of the drive shaft 50.

[0185] Specifically, in the above embodiment, the concave surface of the cutting portion 1133 in the first set of cutting members 11301 faces the axis of the drive shaft 50, while the concave surfaces of the cutting portions 1133 in the second set of cutting members 11303 all face away from the axis of the drive shaft 50. At this time, foreign objects entering the protective structure 10 from any direction can first be cut by the cutting portion 1133 in the second set of cutting members 11303, and then moved towards the outside of the protective structure 10 under the guidance of the second surface 11337 of the cutting portion 1133 in the second set of cutting members 11303. Foreign objects that are not cut by the second set of cutting members 11303 or are not pushed to the outside of the protective structure 10 by the second set of cutting members 11303 are subjected to secondary cutting by the first set of cutting members 11301 when they approach the first set of cutting members 11301. Therefore, at this time, the second set of cutting components 11303 can cut most of the foreign objects in the area surrounding the protective structure 10 and push the cut foreign objects away from the protective structure 10. The first set of cutting components 11301 plays a secondary cutting effect on the foreign objects that still enter the protective structure 10. At this time, the application scenario of the protective structure 10 is water with fewer foreign objects, and it mainly adopts defensive protection. At this time, the protective structure 10 has a good effect on the discharge of foreign object debris.

[0186] Please refer to Figure 5 , Figure 6 and Figure 13 In some embodiments, the first surface 11335 of the cutting portion 1133 in the first set of cutting members 11301 is a curved surface that convexes outward in the direction close to the axis of the drive shaft 50, and the second surface 11337 of the cutting portion 1133 in the first set of cutting members 11301 is a curved surface that is concave in the direction close to the axis of the drive shaft 50. The first surface 11335 of the cutting portion 1133 in the second set of cutting members 11303 is a curved surface that convexes outward in the direction close to the axis of the drive shaft 50, and the second surface 11337 of the cutting portion 1133 in the second set of cutting members 11303 is a curved surface that is concave in the direction close to the axis of the drive shaft 50.

[0187] Specifically, in the above embodiment, the concave surface of the cutting portion 1133 in the first set of cutting members 11301 faces the axis of the drive shaft 50, while the concave surfaces of the cutting portions 1133 in the second set of cutting members 11303 all face away from the axis of the drive shaft 50. At this time, foreign objects entering the protective structure 10 from any direction can first be cut by the cutting portion 1133 in the second set of cutting members 11303, and then moved towards the outside of the protective structure 10 under the guidance of the second surface 11337 of the cutting portion 1133 in the second set of cutting members 11303. Foreign objects that are not cut by the second set of cutting members 11303 or are not pushed to the outside of the protective structure 10 by the second set of cutting members 11303 are subjected to secondary cutting by the first set of cutting members 11301 when they are close to it, and continue to be guided away from the drive shaft 50. Therefore, at this time, the second set of cutting components 11303 can cut most of the foreign objects in the area surrounding the protective structure 10 and push the cut foreign objects away from the protective structure 10. The first set of cutting components 11301 plays a secondary cutting effect on the foreign objects that still enter the protective structure 10 and guides the cut foreign objects to the outside of the protective structure 10. At this time, the protective structure 10 has excellent chip removal and anti-clogging capabilities. All cutting processes tend to throw the foreign object debris outward, greatly reducing the risk of foreign object debris accumulation and ensuring that the protective structure 10 can work normally.

[0188] Please refer to Figure 5 , Figure 6 and Figure 13 In some embodiments, each cutter 113 in the first set of cutters 11301 is radially offset from each cutter 113 in the second set of cutters 11303.

[0189] Specifically, in the radial direction of the drive shaft 50, each cutting element 113 in the first group of cutting elements 11301 is closer to the drive shaft 50 than each cutting element 113 in the second group of cutting elements 11303. When the cutting elements 113 in the first group of cutting elements 11301 and each cutting element 113 in the second group of cutting elements 11303 are offset in the radial direction of the drive shaft 50, an interlaced and interconnected tortuous channel is formed between the first group of cutting elements 11301 and the second group of cutting elements 11303. When a foreign object rotates into the channel, it is not easy for the foreign object to flow out of the channel quickly to the outside of the cutting module 11 and the actuating module 13. Instead, it is easy for the foreign object to come into contact with and be cut by the cutting elements 113 in the first group of cutting elements 11301 and / or the second group of cutting elements 11303. Therefore, the probability and number of times foreign objects are cut increases, the cutting module 11 effectively improves the cutting ability of foreign objects, the protective structure 10 can cut foreign objects more effectively, the foreign objects will not affect the propulsion device 100, and the propulsion device 100 can work normally.

[0190] Please refer to Figure 5, Figure 6 and Figure 14 In some embodiments, the distance from any one of the cutting elements 113 to the drive shaft 50 is less than the distance from at least one of the toggle elements 133 to the drive shaft 50.

[0191] Specifically, using the plane perpendicular to the axis of the drive shaft 50 as the projection plane, the projection ranges of the rotation trajectory of the actuating member 133 and the rotation trajectory of the cutting member 113 on the projection plane are spaced apart. When the distance from any cutting member 113 to the drive shaft 50 is less than the distance from at least one actuating member 133 to the drive shaft 50, the projection range of the rotation trajectory of at least one actuating member 133 is outside the rotation trajectory of each cutting member 113. It can be understood that at least one actuating member 133 rotates around the cutting member 113, moving foreign objects farther from the cutting member 113 to its vicinity. Therefore, foreign objects in the area surrounding the protective structure 10 can approach the cutting member 113 and be cut up by the actuating module 13, without affecting the propulsion device 100, allowing the propulsion device 100 to function normally.

[0192] In some embodiments, the movement trajectory of the actuating member 133 intersects the movement trajectories of each cutter 113 in the first group of cutters 11301 and each cutter 113 in the second group of cutters 11303. In this case, this part of the actuating member 133 can move the foreign object between the first group of cutters 11301 and the second group of cutters 11303 to the vicinity of the cutter 113. Therefore, the cutting module 11 can cut the foreign object multiple times to cut it into smaller fragments, and the foreign object is less likely to affect the propulsion device 100.

[0193] Please refer to Figure 5 and Figure 6 In some embodiments, the distance from any cutting element 113 to the drive shaft 50 is less than the distance from any toggle element 133 to the drive shaft 50.

[0194] Specifically, using the plane perpendicular to the axis of the drive shaft 50 as the projection plane, the projection ranges of the rotation trajectories of the actuating element 133 and the cutting element 113 on the projection plane are spaced apart. When the distance from any cutting element 113 to the drive shaft 50 is less than the distance from any actuating element 133 to the drive shaft 50, the projection range of the rotation trajectories of all actuating elements 133 is outside the rotation trajectories of each cutting element 113. It can be understood that when all actuating elements 133 rotate around the cutting element 113, a large number of foreign objects far from the cutting element 113 can be moved to its vicinity. Therefore, foreign objects in the area surrounding the protective structure 10 can approach the cutting element 113 under the actuation of the actuating module 13, and foreign objects in a large area around the propulsion device 100 can be effectively cut by the protective structure 10. The foreign objects will not affect the propulsion device 100, and the propulsion device 100 can operate normally.

[0195] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combination of these technical features does not contradict each other, it should be considered within the scope of this specification. At the same time, other implementation methods can be derived from the above embodiments, so that structural and logical substitutions and changes can be made without departing from the scope of this disclosure.

[0196] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these modifications and improvements all fall within the scope of protection of this application. Therefore, the scope of protection of this patent application should be determined by the appended claims.

Claims

1. A protective structure applied to the propulsion device of a water thruster, the propulsion device comprising a propulsion body and a drive shaft extending from the propulsion body, characterized in that, The protective structure includes: The first mounting component is connected to the drive shaft; At least two cutting elements are disposed on the first mounting member at intervals from each other; A second mounting member is connected to the drive shaft, the second mounting member being axially opposite to and spaced apart from the first mounting member on the drive shaft; and At least two actuating elements are disposed at a distance from each other on the second mounting member, and at least two cutting elements are spaced apart from the at least two actuating elements. One of the first mounting member and the second mounting member is capable of rotating with the drive shaft so that the actuating elements and the cutting elements can rotate relative to each other. During the relative rotation of the actuating elements and the cutting elements, the actuating elements are used to actuate foreign objects that have entered between the first mounting member and the second mounting member, and the cutting elements are used to cut foreign objects that have entered between the first mounting member and the second mounting member. In the axial direction of the drive shaft, the extension coverage of the cutting elements and the extension coverage of the actuating elements at least partially overlap.

2. The protective structure according to claim 1, characterized in that, The at least two cutting elements are evenly distributed around the axis of the drive shaft; and / or, The at least two actuating elements are evenly distributed around the axis of the drive shaft; and / or, The number of cutting components is equal to the number of actuating components. The cutting components are evenly distributed around the axis of the drive shaft, and the actuating components are evenly distributed around the axis of the drive shaft.

3. The protective structure according to any one of claims 1-2, characterized in that, In the axial direction of the drive shaft, the first mounting member includes a first surface facing the second mounting member and a second surface facing away from the second mounting member; the second mounting member includes a third surface facing the first mounting member and a fourth surface facing away from the first mounting member; the cutting member is mounted on the first surface; and the actuating member is mounted on the third surface; and / or, the second mounting member includes a side surface connecting the third surface and the fourth surface; the actuating member is mounted on the side surface and bent toward the first surface.

4. The protective structure according to claim 1, characterized in that, The cutting component includes: The connecting part is connected to the first mounting component; and A cutting portion is connected to the connecting portion, at least a portion of which protrudes from the first mounting member, and the portion of the cutting portion protruding from the first mounting member is used to cut foreign objects that enter between the first mounting member and the second mounting member; The connecting part is detachably connected to the first mounting component.

5. The protective structure according to claim 4, characterized in that, The protruding position of the cutting part on the first mounting member along the radial direction of the drive shaft is adjustable; The first mounting member has a first protrusion and a second protrusion, which are radially offset from each other on the drive shaft. The protruding position of the cutting portion on the first mounting member is adjustable so that the connecting portion can be selectively fitted to either the first protrusion or the second protrusion for adjustment; and / or, The first mounting member is provided with a first sliding groove, which extends radially along the drive shaft. The protruding position of the cutting part on the first mounting member is adjustable so that the connecting part can be slidably adjusted to any position in the first sliding groove. The cutting member includes a first locking part, which connects the connecting part and the first mounting member and is used to lock the connecting part in a set position in the first sliding groove. And / or, the protective structure includes a first driving member, which is connected to the connecting part and is used to drive the connecting part to move to different positions in the first sliding groove.

6. The protective structure according to claim 4, characterized in that, The position of the connecting part on the first mounting member along the direction parallel to the axis of the drive shaft is adjustable; The first mounting component has a first mounting position and a second mounting position, which are offset in a direction parallel to the axis of the drive shaft. The mounting position of the connecting part on the first mounting component is adjustable so that the connecting part can be selectively mounted on the first mounting position or the second mounting position; and / or, The first mounting member is provided with a second sliding groove, which extends along a direction parallel to the axis of the drive shaft. The mounting position of the connecting part on the first mounting member is adjustable so that the connecting part can be slidably adjusted to any position in the second sliding groove. The cutting member includes a second locking part, which connects the connecting part and the first mounting member and is used to lock the connecting part in a set position in the second sliding groove. And / or, the protective structure includes a second driving member, which is connected to the connecting part and is used to drive the connecting part to move to different positions in the second sliding groove.

7. The protective structure according to claim 4, characterized in that, The protective structure further includes a buffer member disposed between the connecting portion and the first mounting member, for absorbing the increased load from the cutting portion; and / or, the buffer member surrounds the connecting portion around its periphery in a direction parallel to the axis of the drive shaft; and / or, The first mounting component is provided with an anti-reverse mounting hole, and the connecting part is adapted to the anti-reverse mounting hole; and / or, The extending direction of the cutting portion is parallel to the extending direction of the actuating member, and / or the extending direction of the cutting portion is parallel to the axis of the drive shaft, and the extending direction of the actuating member is parallel to the axis of the drive shaft.

8. The protective structure according to claim 4, characterized in that, The cutting part is provided with a first blade and a second blade on opposite sides of the drive shaft in the circumferential direction. When the actuating member and the cutting member can rotate relative to each other in a first direction, the first blade is used to cut the foreign object; when the actuating member and the cutting member can rotate relative to each other in a second direction, the second blade is used to cut the foreign object, and the first direction is opposite to the second direction. The cutting section has a first surface facing the axis of the drive shaft and a second surface facing away from the first surface, and the two sides of the first surface and the two sides of the second surface are respectively used to form the first cutting edge and the second cutting edge.

9. The protective structure according to claim 8, characterized in that, The cutting section also includes an end away from the first mounting member, and the end is provided with a third cutting edge; the third cutting edge smoothly transitions with the first cutting edge and the second cutting edge.

10. The protective structure according to claim 8, characterized in that, The second surface is a convex surface oriented outwards in a direction away from the axis of the drive shaft, and the first surface is a plane or a concave surface oriented inwards in a direction away from the axis of the drive shaft, or a convex surface oriented towards the drive shaft; or, the second surface is a plane or a concave surface oriented towards the drive shaft, and the first surface is a convex surface oriented towards the drive shaft; or, at least one of the second surface and the first surface is a wavy surface; and / or, The first and second cutting edges are provided with reinforcing layers, which are used to improve the cutting performance of the cutting part; and / or, The shape of the first cutting edge is any one of wavy, serrated, continuous curve, or straight line; and / or, The shape of the second blade can be any one of wavy, toothed, continuous curve, or straight line.

11. The protective structure according to claim 4, characterized in that, The cutting component includes: The first group of cutting components includes a plurality of said cutting components, wherein the cutting portions of the first group of cutting components are arranged around the axis of the first mounting component and distributed on a first circle centered at a reference point on the axis of the first mounting component; and The second set of cutting components includes multiple cutting components. The cutting portions of the second set of cutting components are arranged around the axis of the first mounting component and distributed on a second circle centered on a reference point on the axis of the first mounting component. The diameter of the second circle is larger than the diameter of the first circle. In the first group of cutting components, the second surface of the cutting portion is a convex curved surface oriented outwards in a direction away from the axis of the drive shaft; the first surface of the cutting portion in the first group of cutting components is a concave curved surface oriented inwards in a direction away from the axis of the drive shaft. Similarly, in the second group of cutting components, the second surface of the cutting portion is a convex curved surface oriented outwards in a direction away from the axis of the drive shaft; the first surface of the cutting portion in the second group of cutting components is a concave curved surface oriented inwards in a direction away from the axis of the drive shaft. In the first group of cutting components, the first surface of the cutting portion is a convex curved surface convex outward in a direction close to the axis of the drive shaft; the second surface of the cutting portion in the first group of cutting components is a concave curved surface convex in a direction close to the axis of the drive shaft; the second surface of the cutting portion in the second group of cutting components is a convex curved surface convex outward in a direction away from the axis of the drive shaft; the first surface of the cutting portion in the second group of cutting components is a concave curved surface convex in a direction away from the axis of the drive shaft; or, In the first group of cutting components, the second surface of the cutting portion is a convex curved surface oriented away from the axis of the drive shaft; the first surface of the cutting portion in the first group of cutting components is a concave curved surface oriented away from the axis of the drive shaft; in the second group of cutting components, the first surface of the cutting portion is a convex curved surface oriented towards the axis of the drive shaft; the second surface of the cutting portion in the second group of cutting components is a concave curved surface oriented towards the axis of the drive shaft; or, The first surface of the cutting portion in the first group of cutting components is a curved surface that convexes outward toward the axis of the drive shaft, and the second surface of the cutting portion in the first group of cutting components is a curved surface that is concave inward toward the axis of the drive shaft. The first surface of the cutting portion in the second group of cutting components is a curved surface that convexes outward toward the axis of the drive shaft, and the second surface of the cutting portion in the second group of cutting components is a curved surface that is concave inward toward the axis of the drive shaft.

12. The protective structure according to claim 11, characterized in that, Each of the cutting elements in the first group is radially offset from each of the cutting elements in the second group on the drive shaft; and / or, The distance from any one of the cutting elements to the drive shaft is less than the distance from at least one of the actuating elements to the drive shaft; or, the distance from any one of the cutting elements to the drive shaft is less than the distance from any one of the actuating elements to the drive shaft.

13. A propulsion device, characterized in that, include: The propulsion unit used to output propulsion power underwater; A drive shaft passes through and extends out of the propulsion body, and the drive shaft is rotatable relative to the propulsion body; and The protective structure according to any one of claims 1-12 is installed on the drive shaft, wherein one of the first mounting member and the second mounting member in the protective structure can rotate with the drive shaft, and the other is fixedly connected to the propulsion body; The propulsion device further includes a propeller, which is fixedly connected to the drive shaft. The propeller includes a hub and blades disposed on the hub, and the protective structure is disposed between the hub and the propulsion body.

14. A water propulsion device, said water propulsion device being used to propel a water carrier to move in water, characterized in that, include: Main body of the fuselage; A connecting device for connecting the main body of the machine to the water carrier; and The propulsion device of claim 13, wherein the propulsion device is connected to the fuselage body and is used to output propulsion force.

15. A water-based mobile device, characterized in that, include: Waterborne carriers; and The water propulsion device of claim 14, wherein the connecting device is connected to the water carrier.

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