Underwater manpower propeller

Abstract

The embodiment of the invention discloses an underwater manpower propeller which comprises a power structure, a propeller body and a propeller body. The driving structure comprises a first impeller, a second impeller and a transmission structure, the first impeller and the second impeller are arranged at the same axial position, and the first impeller and the second impeller have opposite blade deviations; the power structure drives the first impeller and the second impeller to rotate in the opposite directions through the transmission structure, so that the first impeller and the second impeller generate thrust in the same direction. Compared with the prior art, manual driving is adopted, the problems of battery capacity, volume, charging and the like of an existing electric driving device do not need to be considered, the two impellers rotate in the opposite directions, the inclination angles of the blades on the two impellers are opposite, torque generated by rotation of the two impellers can be offset, and the service life of the impeller is prolonged. And the propeller is more stable during operation.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of underwater driving technology, and in particular to an underwater human-powered propeller. Background Art

[0002] With the development of society, diving has gradually become a recreational activity for ordinary people to play underwater, and submersible equipment has gradually developed from large deep-sea diving equipment to small shallow-sea diving equipment. In the existing shallow-sea diving equipment, thrusters are gradually used to help divers reach the desired location more quickly and effortlessly. Among the existing thrusters, the most common technical solution is to drive the spiral blades by a motor. The biggest problem with electric drive is power supply, among which the endurance is directly related to the capacity of the battery; and when using it, the battery power needs to be confirmed. Secondly, electric drive also needs to solve the problem of sealing. The battery, motor and circuit need to be placed in a sealed environment. In addition, in the existing technical solution, a single impeller is used to provide driving force, and a single impeller will generate a torque when rotating. If the center of gravity is low, this torque will have an adverse effect. Summary of the invention

[0003] An embodiment of the present application provides an underwater human-powered propeller, which is driven by human power and does not require batteries. In addition, the propeller does not contain electronic devices and has relatively few sealing areas. Moreover, the propeller adopts a dual-impeller drive scheme, and the dual impellers rotate in opposite directions, which can offset the rotational distortion generated by the impeller during rotation, thereby making the propeller move more smoothly.

[0004] A human-powered underwater propeller comprises a power structure, wherein the power structure is configured to use human power as a driving force; and a drive structure, wherein the drive structure comprises a first impeller, a second impeller and a transmission structure, wherein the first impeller and the second impeller are arranged at the same axial position, and the first impeller and the second impeller have opposite blade deflections; wherein the power structure drives the first impeller and the second impeller to rotate in opposite directions through the transmission structure, so that the first impeller and the second impeller generate thrust in the same direction.

[0005] In some embodiments, the power structure includes a central axis and foot pedals respectively arranged at both ends of the central axis, and a power gear is installed on the central axis; the transmission structure includes a gear set, and the gear set includes a first gear fixedly connected to the first impeller and a second gear fixedly connected to the second impeller; the power structure drives the first gear and the second gear of the transmission structure through its power gear to rotate the first impeller and the second impeller.

[0006] In some embodiments, it also includes a fixed shaft; the axis of the central shaft is perpendicular to the axis of the fixed shaft, and the central shaft and the fixed shaft are rotatably connected; the first impeller and the second impeller are both rotatably sleeved on the fixed shaft; the first gear is arranged at the first end of the first impeller facing the central shaft; the second gear is arranged at the first end of the second impeller facing the central shaft.

[0007] In some embodiments, the first impeller is arranged between the central shaft and the second impeller; the transmission structure also includes a third gear, which is fixedly mounted on the second end of the first impeller; and a gear shaft, which is arranged between the first impeller and the second impeller, and on which a fourth gear is rotatably mounted; wherein the first gear is meshingly connected to the power gear, and the second gear is meshingly connected to the third gear through the fourth gear.

[0008] In some embodiments, the transmission structure further includes a shaft sleeve, and the shaft sleeve is disposed between the first gear and the first impeller.

[0009] In some embodiments, the propeller also includes a fixed shaft; the middle shaft and the fixed shaft are rotatably connected; the transmission structure also includes a rotating shaft and a planetary gear, the axial direction of the rotating shaft is the same as the axial direction of the planetary gear, a fifth gear is installed on the rotating shaft, the planetary gear is arranged on the fixed shaft, the fifth gear is meshed with the planetary gear, and the rotating shaft and the fixed shaft are rotatably connected; the first end of the rotating shaft is close to the middle shaft, the second gear is fixedly installed on the first end of the rotating shaft, the second gear is meshed with the power gear, and the second impeller is fixedly installed on the second end of the rotating shaft; the first impeller is arranged between the second gear and the second impeller, and is rotatably sleeved on the rotating shaft; the first gear includes a gear ring arranged on the inner wall of the first impeller, and the gear ring is meshed with the planetary gear.

[0010] In some embodiments, the propeller is installed with an outer cover, and the first impeller and the second impeller are both arranged in the outer cover; the outer cover includes a first end and a second end opposite to each other, wherein the first end of the outer cover faces the thrust direction of the propeller.

[0011] In some embodiments, the outer cover includes a drainage tube, the drainage tube is disposed at a first end of the outer cover, and a radius of an inlet of the drainage tube is greater than a radius of an inner side thereof.

[0012] In some embodiments, the outer cover includes a tail pipe, the tail pipe is disposed at the second end of the outer cover, and the radius of the outlet of the tail pipe is smaller than the radius of the inner side thereof.

[0013] In some embodiments, a protective net is provided at the first end and / or the second end of the outer cover, the protective net has a plurality of meshes, and the outer edge of the protective net is connected to the inner wall of the outer cover.

[0014] In some embodiments, the first end of the fixed shaft faces the thrust direction of the propeller;

[0015] The first end of the fixed shaft is provided with a middle tube, one end of the middle tube is connected to the first end of the fixed shaft, and the fixed shaft and the middle tube are optionally provided with an angle α, so that the middle tube and the power structure and the driving structure are arranged ergonomically.

[0016] In some embodiments, a handle is disposed at the first end of the fixed shaft.

[0017] In some embodiments, a telescopic upper tube is disposed at the first end of the fixed shaft.

[0018] In some embodiments, the thruster further includes a protective cover, and the power gear and the first gear are both disposed inside the protective cover; one end of the protective cover facing the thrust direction of the thruster is conical.

[0019] In some embodiments, at least one one-way gear is provided in the power structure and the driving structure, so that human power can be transmitted to the driving structure in one direction.

[0020] Compared with the prior art, the present application adopts a human-powered driving mode. By adopting human-powered driving, the present application gets rid of the dependence on electric energy, not only avoiding the battery capacity limitation, bulky volume and the inconvenience of frequent charging in the traditional electric drive device, but also greatly reducing environmental pollution. The underwater human-powered propeller disclosed in the present application is lighter and easier to carry, suitable for a variety of scenarios such as swimming, fitness, sports and entertainment, without worrying about power supply problems, and improving the flexibility and universality of use. Secondly, the present application adopts a double-impeller design. Compared with the technical solution of a single impeller, the double impellers of the present application rotate in opposite directions, and the inclination angles of the blades on the two impellers are opposite, which not only effectively balances the deflection torque of the propeller when it is running in the water, ensuring the stability of the operation, but also significantly enhances the thrust efficiency through the coordinated operation of the double impellers. Without increasing energy consumption, a more powerful underwater propulsion force is achieved, which is particularly suitable for application scenarios such as diving and underwater operations that require efficient power support. Third, a protective cover is installed on the power structure to prevent the gears in the power structure from scratching the user, and to prevent debris in the water from being entangled in the gears of the power structure, thereby improving the safety of use, extending the service life of the equipment, and reducing maintenance costs. Fourth, an outer cover is installed on the drive structure, which, in addition to its protective function, can also form a duct for water flow; it achieves effective guidance and acceleration of the water flow, and a drainage pipe is provided at the first end of the outer cover, and a tail pipe is provided at the second end. The setting of the drainage pipe and the tail pipe optimizes the inlet and outlet of the water power, significantly increases the water flow speed and pressure in the duct, thereby further improving the output thrust of the propeller without increasing the manpower burden, and achieving more efficient power conversion. Users can control speed and direction more freely when they are underwater, which improves the sensitivity and efficiency of the operation. It can increase the amount of water inlet into the duct, and also increase the thrust output of the duct. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings constituting part of the present application are used to provide a further understanding of the present application. The exemplary embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. Among them:

[0022] Figure 1 is a schematic diagram of the structure of a propeller in some embodiments;

[0023] Figure 2 for Figure 1 A local enlarged schematic diagram of the middle A;

[0024] Figure 3 for Figure 1 Exploded diagram of

[0025] Figure 4 for Figure 1 A side view schematic diagram of the structure;

[0026] Figure 5 for Figure 4 BB direction cross-sectional view;

[0027] Figure 6 for Figure 5 A partial enlarged schematic diagram of point C in the middle;

[0028] Figure 7 for Figure 5 A partial enlarged schematic diagram of point D in the middle;

[0029] Figure 8 is a schematic diagram of the overall structure of some embodiments;

[0030] Fig. 9 for Figure 8 EE direction cross-sectional view;

[0031] Fig.10 for Fig. 9 A partial enlarged schematic diagram of point F in the middle;

[0032] Fig.11 and Fig.12 for Figure 8 Schematic diagram of different viewing angles;

[0033] Fig.13 is a schematic diagram of the structure of a propeller in some embodiments;

[0034] Fig.14 is a schematic diagram of a power structure in some embodiments;

[0035] Fig.15 Schematic diagram of a power structure and a driving structure in some embodiments;

[0036] Fig.16 for Fig.15 Schematic diagram of the GG direction section;

[0037] Fig.17 Schematic diagram of a power structure and a driving structure in some embodiments;

[0038] Fig.18 for Fig.17 Schematic diagram of the HH direction section;

[0039] Fig.19 for Fig.18 A local enlarged schematic diagram of point I in the middle;

[0040] Fig. 20 for Fig.18 A local enlarged schematic diagram of point J in the middle.

[0041] Description of reference numerals:

[0042] 101-middle tube; 102-fixed shaft; 103-upper tube; 104-buckle; 105-handle; 106-rotating shaft; 1061-sixth bevel gear; 1062-third gear; 107-planetary gear; 1071-gear shaft;

[0043] 20, 21-power structure; 201-middle shaft; 202-crank; 203-pedal; 204-first bevel gear; 205-shaft hole; 206-protective cover; 207-turbine; 208-worm; 209-support seat; 2010-first gear;

[0044] 30, 31, 32-driving structure; 301-sleeve; 3011-second bevel gear; 3012-third bevel gear; 302-first impeller; 3021-gear ring; 3022-first blade; 303-second impeller; 3031-fourth bevel gear; 3032-second blade; 304-transmission shaft; 3041-fifth bevel gear; 305-outer cover; 3051-support rod; 3052-duct; 3053-first protective net; 3054-second protective net; 3055-drainage pipe; 3056-tail pipe; 306-second gear. DETAILED DESCRIPTION

[0045] The present application will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments. Each example is provided by way of explanation of the present application and does not limit the present application. In fact, it will be clear to those skilled in the art that modifications and variations may be made in the present application without departing from the scope or spirit of the present application. For example, a feature shown or described as a part of an embodiment may be used in another embodiment to produce yet another embodiment. Therefore, it is desired that the present application includes such modifications and variations within the scope of the appended claims and their equivalents.

[0046] In the description of this application, the terms "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and do not require that this application must be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on this application. The terms "connected", "connected", and "set" used in this application should be understood in a broad sense. For example, they can be fixed connections or detachable connections; they can be directly connected or indirectly connected through intermediate components. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0047] One or more examples of the present application are shown in the accompanying drawings. The detailed description uses numbers and letter marks to refer to features in the drawings. Similar or similar marks in the drawings and description have been used to refer to similar or similar parts of the present application. As used herein, the terms "first", "second", and "third", etc. are used interchangeably to distinguish one component from another and are not intended to indicate the location or importance of individual components.

[0048] like Figures 1 to 3 As shown, according to an embodiment of the present application, an underwater human-powered propulsion device is provided, including a fixed shaft 102 , on which a power structure 20 and a driving structure 30 are arranged, and the power structure 20 is connected to the driving structure 30 and provides driving force for the driving structure 30 .

[0049] like Figure 1 and Figures 2 to 6 As shown, the power structure 20 includes an axial hole 205, which is arranged at the first end of the fixed shaft 102, and the axial hole 205 is arranged along the radial direction of the fixed shaft 102. A rotatable central shaft 201 is installed in the axial hole 205, and the central shaft 201 is connected to the inner wall of the axial hole 205 through a bearing. Cranks 202 are respectively arranged on both sides of the axial hole 205, and the first ends of the cranks 202 are respectively fixedly connected to the ends of the central shaft 201, and a pedal 203 is installed at the second end of each crank 202. The central shaft 201 is directly driven to rotate by the pedal 203, which not only conforms to the natural movement mode of the human body, but also enables the user to comfortably and efficiently use the leg strength for propulsion, which is particularly suitable for long-term underwater operations or recreational activities, and reduces fatigue. A first bevel gear 204 is fixedly installed on one side of the central shaft 201.

[0050] like Figures 1 to 7 As shown, the driving structure 30 includes a first impeller 302, a second impeller 303 and a transmission structure for transmitting power.

[0051] The transmission structure includes a sleeve 301, which is sleeved on the outer side of the fixed shaft 102. The first end of the sleeve 301 is close to the middle shaft 201, and the first end of the sleeve 301 is fixedly installed with a second bevel gear 3011, and the second bevel gear 3011 is meshed and connected with the first bevel gear 204; the second end of the sleeve 301 is fixedly installed with a third bevel gear 3012. Among them, the second bevel gear 3011 and the third bevel gear 3012 are both connected to the fixed shaft 102 through bearings. The first impeller 302 is fixedly sleeved on the outer side of the sleeve 301, and the first impeller 302 is arranged between the second bevel gear 3011 and the third bevel gear 3012 and close to the third bevel gear 3012. The second end of the fixed shaft 102 extends from the second end of the sleeve 301, and the second impeller 303 is installed between the second end of the fixed shaft 102 and the third bevel gear 3012, and the second impeller 303 is connected to the fixed shaft 102 through bearings. A fourth bevel gear 3031 is fixedly mounted on one end of the second impeller 303 facing the sleeve 301. The transmission structure further includes a transmission shaft 304, which is disposed between the third bevel gear 3012 and the fourth bevel gear 3031. The axial direction of the transmission shaft 304 is disposed along the radial direction of the fixed shaft 102, and the first end of the transmission shaft 304 is fixedly connected to the fixed shaft 102. A fifth bevel gear 3041 is mounted on the transmission shaft 304, and the fifth bevel gear 3041 is connected to the transmission shaft 304 through a bearing. The fifth bevel gear 3041 is meshedly connected with the third bevel gear 3012 and the fourth bevel gear 3031.

[0052] When the driving force drives the sleeve 301, the third bevel gear 3012 and the first impeller 302 to rotate in the first direction, the third bevel gear 3012 transmits the driving force to the fourth bevel gear 3031 through the fifth bevel gear 3041, thereby driving the second impeller 303 to rotate in the second direction. The first direction and the second direction are opposite, and the function is that the two impellers rotating in opposite directions can offset each other's torque in at least a part of the rotation direction, reduce the mechanical vibration and energy loss caused by the torque imbalance, and improve the operation efficiency and stability of the entire propulsion system. In addition, the first impeller 302 is provided with a plurality of first blades 3022 extending outwardly in the circumference, and the second impeller 303 is provided with a plurality of second blades 3032 extending outwardly in the circumference, and the first blade 3022 and the second blade 3032 have opposite deflections, and the purpose is that when the first impeller 302 and the second impeller 303 rotate in opposite directions, the two impellers can provide driving forces in the same direction, which not only offsets the torque, but more importantly, can concentrate the output thrust in the same direction. This design makes the hydrodynamics more concentrated, increases the volume and speed of the propulsive water flow per unit time, and thus significantly enhances the overall propulsion effect.

[0053] In some embodiments, the third bevel gear 3012 and the fourth bevel gear 3031 have the same specifications, the first impeller 302 and the second impeller 303 have the same specifications, but the first impeller 302 and the second impeller 303 are arranged oppositely. The purpose is that the first impeller 302 and the second impeller 303 can maintain the same rotation speed and have the same magnitude of rotation torque. This symmetry and synchronization optimizes the distribution and use of power, so that each impeller can efficiently contribute its thrust, avoiding the efficiency reduction or uneven mechanical stress caused by the impeller speed mismatch.

[0054] like Figure 8 and Fig. 9 As shown, in some embodiments, a protective cover 206 is provided at the first end of the fixed shaft 102, and the first bevel gear 204 and the second bevel gear 3011 are both provided in the protective cover 206, so as to avoid finger scratches or other injuries caused by accidental contact when the user is operating or approaching the propeller. At the same time, the presence of the protective cover 206 can also prevent foreign objects such as water plants and debris in the water from entering the gear system, reducing the risk of the gear being entangled or damaged, thereby extending the service life of the propeller and improving the safety of use.

[0055] In some embodiments, one end of the protective cover 206 is conical, and the apex of the cone faces the direction of motion of the propeller, which helps to reduce the water flow resistance when traveling underwater. The conical front end can smoothly guide the water flow, reduce the eddy current and separation of the water flow on the surface of the protective cover, and make the water flow pass smoothly without forming a large resistance, thereby improving the hydrodynamic performance and forward efficiency of the propeller. This is particularly important for human-powered underwater propellers because it is directly related to the conversion efficiency of the force applied by the user and the response speed of the propeller.

[0056] like Figures 8 to 10 As shown, in some embodiments, a tubular outer cover 305 is provided at the second end of the fixed shaft 102, and the outer cover 305 is sleeved on the outer side of the fixed shaft 102, and the first end of the outer cover 305 faces the moving direction of the propeller. The first impeller 302 and the second impeller 303 are both arranged in the outer cover 305. The outer cover 305 is fixedly connected to the fixed shaft 102 through at least one support rod 3051. In addition to having a protective function, the inner side of the outer cover 305 can form a duct 3052. The duct 3052 can output the water flow driven by the first impeller 302 and the second impeller 303 to the second end of the duct 3052 along the axial direction of the duct 3052.

[0057] like Figures 9 to 11As shown, in some embodiments, a first protective net 3053 is provided at the first end of the outer cover 305, a first through hole R1 is provided at the center of the first protective net 3053, and the first protective net 3053 is connected to the outer side of the sleeve 301. The outer edge of the first protective net 3053 is fixedly connected to the inner wall of the outer cover 305, and the aperture of the first through hole R1 is greater than or equal to the outer diameter R2 of the sleeve 301. It can not only ensure the free rotation of the sleeve 301, but also effectively prevent larger debris from entering the duct 3052, protect the internal mechanical structure from damage, and keep the water flow unobstructed. The first protective net 3053 is provided with a plurality of meshes to prevent debris from entering the duct 3052.

[0058] like Fig. 9 , Fig.10 and Fig.12 As shown, in some embodiments, a second protective net 3054 is disposed at the second end of the outer cover 305, and the outer edge of the second protective net 3054 is fixedly connected to the inner wall of the outer cover 305; a second through hole is disposed at the center of the second protective net 3054, and the hole wall of the second through hole is fixedly connected to the fixed shaft 102. In addition to preventing debris from entering the duct 3052, the second protective net 3054 can also provide support for the outer cover 305.

[0059] like Figure 8 and Fig.10 As shown, in some embodiments, a drainage tube 3055 is disposed at the first end of the outer cover 305, the radius of the first end of the drainage tube 3055 is greater than the radius of the second end, the radius of the second end of the drainage tube 3055 is the same as the radius of the first end of the outer cover 305, and the second end of the drainage tube 3055 is connected to the first end of the outer cover 305. The drainage tube 3055 can introduce more water into the duct 3052 to increase the water intake.

[0060] like Figure 8 and Fig.10 As shown, in some embodiments, the second end of the outer cover 305 is provided with a tail pipe 3056, the radius of the first end of the tail pipe 3056 is greater than the radius of the second end, the radius of the first end of the tail pipe 3056 is the same as the radius of the second end of the outer cover 305, and the first end of the tail pipe 3056 is connected to the second end of the outer cover 305. The tail pipe 3056 can concentrate the water flow output from the duct 3052, increase the flow rate of the water flow, and then increase the thrust output of the propeller, thereby improving the overall propulsion performance. The conical design of the drainage pipe and the tail pipe not only optimizes the introduction and output of the water flow in terms of function, but also may reduce the direct impact of the water flow on the duct wall to a certain extent, protect the duct structure, and extend the service life.

[0061] like Figure 4 and Figure 5As shown, in some embodiments, the first end of the fixed shaft 102 is provided with a middle tube 101, and the first end of the fixed shaft 102 is connected to the first end of the middle tube 101. The second end of the middle tube 101 is provided with an upper tube 103, and the first end of the upper tube 103 can be inserted into or pulled out from the second end of the middle tube 101 to achieve the telescopic function. The upper tube 103 and the middle tube 101 are locked by a buckle 104 provided at the second end of the middle tube 101.

[0062] like Figure 4 and Figure 5 As shown, in some embodiments, a handle 105 is provided at the second end of the upper tube 103 to facilitate the user's holding and operation, thereby improving the portability and operating comfort of the device, and enabling the user to more stably control the direction and strength of the propeller when using it in water.

[0063] In some embodiments, Fig.13 As shown, the middle tube and the fixed axis can be selectively set to an angle α. The angle α can be set according to ergonomics to provide comfortable support and reduce fatigue during exercise. In some embodiments, the middle tube and the fixed axis are rotatably connected so that the angle α can be selectively set to meet different needs in different situations. At the same time, after the angle α is determined, a limiting structure can be used to fix the angle α. The limiting structure can adopt a locking structure, a damping structure, etc.

[0064] like Fig.14 As shown, according to an embodiment of the present application, a power structure 21 is provided, which includes an axial hole 205, which is arranged on the middle tube 101, and the axial hole 205 is arranged along the radial direction of the middle tube 101, and the axial hole 205 is close to the first end of the middle tube 101. A rotatable middle shaft 201 is installed in the axial hole 205, and the middle shaft 201 is connected to the inner wall of the axial hole 205 through a bearing. Cranks 202 are respectively arranged on both sides of the axial hole 205, and the first ends of the cranks 202 are respectively fixedly connected to the ends of the middle shaft 201, and a pedal 203 is arranged and installed on the second end of each crank 202. A worm wheel 207 is fixedly installed on the middle shaft 201, and a worm 208 is arranged on the outer side of the middle tube 101. The worm 208 is connected to the middle tube 101 through a support seat 209, and the worm 208 is connected to the support seat 209 through a bearing, and the worm wheel 207 is meshed with the worm 208. The first gear 2010 is installed at one end of the worm 208 close to the shaft sleeve 301. In the above-mentioned driving structure 30, the second bevel gear 3011 on the shaft sleeve 301 of the transmission structure is replaced with a second gear 306 that is matched and connected with the first gear 2010.

[0065] like Fig.15 and Fig.16 As shown, according to an embodiment of the present application, a power structure 20 and a driving structure 31 are provided.

[0066] The power structure 20 includes a central shaft 201, which is rotatably mounted on the fixed shaft 102 through a bearing. Cranks 202 are respectively provided on both sides of the central shaft 201, the first end of the crank 202 is fixedly connected to the end of the central shaft 201, the second end of the crank 202 is installed with a pedal 203, and a first bevel gear 204 is fixedly mounted on the central shaft 201.

[0067] The driving structure 31 includes a first impeller 302 and a second impeller 303, which are respectively arranged on both sides of the central shaft 201 and rotatably sleeved on the fixed shaft 102. The third bevel gear 3012 is arranged on the side of the first impeller 302 facing the first bevel gear 204, and is coaxially fixedly connected to the first impeller 302. The fourth bevel gear 3031 is arranged on the side of the second impeller 303 facing the first bevel gear 204, and is coaxially fixedly connected to the second impeller 303. The third bevel gear 3012 and the fourth bevel gear 3031 are both meshed and connected with the first bevel gear 204.

[0068] The third bevel gear 3012 and the fourth bevel gear 3031 are jointly constructed into a transmission structure, and the user converts manpower into driving force through the power structure, and drives the first impeller 302 and the second impeller 303 to rotate through the transmission structure. Among them, the rotation direction of the first impeller 302 is opposite to the rotation direction of the second impeller 303, and its function is that the two impellers rotating in opposite directions can offset each other's torque in at least a part of the rotation direction, reduce the mechanical vibration and energy loss caused by the torque imbalance, and improve the operation efficiency and stability of the entire propulsion system. In addition, the circumference of the first impeller 302 is provided with a plurality of first blades extending outward, and the circumference of the second impeller 303 is provided with a plurality of second blades extending outward, and the first blade and the second blade have opposite deflections, and its purpose is that when the first impeller 302 and the second impeller 303 rotate in opposite directions, the two impellers can provide driving force in the same direction, which not only offsets the torque, but more importantly, can concentrate the output thrust in the same direction. Such a design makes the hydrodynamic force more concentrated, increases the volume and speed of the propulsion water flow per unit time, and thus significantly enhances the overall propulsion effect.

[0069] like Figures 17 to 20 As shown, according to an embodiment of the present application, a power structure 20 and a driving structure 32 are provided.

[0070] The power structure 20 includes a central shaft 201, which is rotatably mounted on the fixed shaft 102 through a bearing. Cranks 202 are respectively provided on both sides of the central shaft 201, the first end of the crank 202 is fixedly connected to the end of the central shaft 201, the second end of the crank 202 is installed with a pedal 203, and a first bevel gear 204 is fixedly mounted on the central shaft 201.

[0071] The driving structure 32 includes a first impeller 302, a second impeller 303 and a transmission structure for transmitting power. The transmission structure includes a rotating shaft 106, a first side of which is inserted from the first end of the fixed shaft 102 and is rotatably connected to the inner wall of the fixed shaft 102. A sixth bevel gear 1061 is fixedly mounted on the first side of the rotating shaft 106, and the sixth bevel gear 1061 is meshedly connected to the first bevel gear 204. The first impeller 302 and the second impeller 303 are both sleeved on the second side of the rotating shaft 106, wherein the first impeller 302 is close to the first end of the fixed shaft 102 and is rotatably connected to the rotating shaft 106, and the second impeller 303 is fixedly connected to the rotating shaft 106. A plurality of first blades extending outward are arranged in the circumference of the first impeller 302, and a plurality of second blades extending outward are arranged in the circumference of the second impeller 303, and the first blades and the second blades are arranged in a mirror image.

[0072] In some embodiments, the first impeller 302 is provided with a first end and a second end along its axial direction, wherein the first end of the first impeller 302 is close to the first end of the fixed shaft 102. The second end of the first impeller 302 is rotatably connected to the outer wall of the rotating shaft 106 through a bearing, and a gear ring 3021 is provided on the inner wall of the first end of the first impeller 302. The transmission structure further includes a planetary gear 107, the axial direction of the planetary gear 107 is the same as the axial direction of the rotating shaft 106 and the axial direction of the first impeller 302, the planetary gear 107 is fixedly mounted on the first end of the fixed shaft 102 through a gear shaft 1071, and the planetary gear 107 is meshedly connected with the gear ring 3021. A third gear 1062 is provided on the rotating shaft 106, and the third gear 1062 is meshedly connected with the gear ring 3021 through the planetary gear 107. The user converts manpower into driving force through the power structure, and drives the first impeller 302 and the second impeller 303 to rotate through the transmission structure, wherein the rotation direction of the first impeller 302 is opposite to the rotation direction of the second impeller 303, and its function is the same as that in the above embodiment, which will not be repeated here.

[0073] In some embodiments, the first bevel gear 204 of any of the above embodiments is rotatably connected to the central shaft 201 via a one-way gear; or, the worm gear 207 is rotatably connected to the central shaft via a one-way gear; or, the first gear 2010 is rotatably connected to the worm 208 via a one-way gear, so that the power structure and the drive structure can transmit motion in one direction.

[0074] The fixed shaft 102 of any of the above embodiments may selectively include a middle tube 101 , and the fixed shaft 102 and the middle tube 101 are integrally formed or fixedly connected or detachably connected or rotatably connected.

[0075] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An underwater human-powered propulsion device, characterized in that: include, a power structure configured to convert human power into driving force; and A driving structure, the driving structure comprising a first impeller (302), a second impeller (303) and a transmission structure, the first impeller (302) and the second impeller (303) being arranged at the same axial position, and the first impeller (302) and the second impeller (303) having opposite blade deflections; The power structure drives the first impeller (302) and the second impeller (303) to rotate in opposite directions via the transmission structure, so that the first impeller (302) and the second impeller (303) generate thrust in the same direction.

2. The underwater human-powered propulsion device according to claim 1, characterized in that: The power structure comprises a central axis (201) and foot pedals (203) respectively arranged at two ends of the central axis (201); a power gear is installed on the central axis (201); The transmission structure comprises a gear set, wherein the gear set comprises a first gear fixedly connected to the first impeller (302) and a second gear fixedly connected to the second impeller (303); The power structure drives the first gear and the second gear of the transmission structure through its power gear, so as to rotate the first impeller (302) and the second impeller (303).

3. The underwater human-powered propulsion device according to claim 2, characterized in that: Also includes a fixed shaft (102); The central shaft (201) and the fixed shaft (102) are rotatably connected; The first impeller (302) and the second impeller (303) are both rotatably sleeved on the fixed shaft (102); the first gear is arranged at the first end of the first impeller (302) facing the central shaft (201); and the second gear is arranged at the first end of the second impeller (303) facing the central shaft (201).

4. The underwater human-powered propulsion device according to claim 3, characterized in that: The first impeller (302) is arranged between the central shaft (201) and the second impeller (303); The transmission structure also includes: A third gear fixedly mounted on the second end of the first impeller (302); and a gear shaft (304), the gear shaft (304) being arranged between the first impeller (302) and the second impeller (303), and a fourth gear being rotatably mounted on the gear shaft (304); Wherein, the first gear is meshed and connected with the power gear, and the second gear is meshed and connected with the third gear through the fourth gear.

5. The underwater human-powered propulsion device according to claim 4, characterized in that: The transmission structure further comprises a shaft sleeve (301), wherein the shaft sleeve (301) is arranged between the first gear and the first impeller (302); or / and The propeller further comprises a protective cover (206), wherein the power gear and the first gear are both arranged in the protective cover (206); one end of the protective cover (206) facing the thrust direction of the propeller is conical.

6. The underwater human-powered propulsion device according to claim 2, characterized in that: Also includes a fixed shaft (102); The central shaft (201) and the fixed shaft (102) are rotatably connected; The transmission structure further comprises a rotating shaft (106) and a planetary gear (107); the axial direction of the rotating shaft (106) is the same as the axial direction of the planetary gear (107); a fifth gear (1062) is mounted on the rotating shaft (106); the planetary gear (107) is arranged on the fixed shaft (102); the fifth gear (1062) is meshedly connected with the planetary gear (107); and the rotating shaft (106) and the fixed shaft (102) are rotatably connected; The first end of the rotating shaft (106) is close to the central shaft (201), the second gear is fixedly mounted on the first end of the rotating shaft (106), the second gear is meshingly connected with the power gear, and the second impeller (303) is fixedly mounted on the second end of the rotating shaft (106); The first impeller (302) is arranged between the second gear and the second impeller (303), and is rotatably sleeved on the rotating shaft (106); the first gear includes a ring gear (3021) arranged on the inner wall of the first impeller (302), and the ring gear (3021) is meshingly connected with the planetary gear (107).

7. The underwater human-powered propulsion device according to claim 1, 2, 3 or 6, characterized in that: It also includes an outer cover (305), wherein the first impeller (302) and the second impeller (303) are both disposed in the outer cover (305); The outer cover (305) comprises a first end and a second end opposite to each other, wherein the first end of the outer cover (305) faces the thrust direction of the propeller.

8. The underwater human-powered propulsion device according to claim 7, characterized in that: The outer cover (305) comprises a drainage tube (3055), wherein the drainage tube (3055) is arranged at a first end of the outer cover (305), and the radius of the inlet of the drainage tube (3055) is greater than the radius of the inner side thereof; or / and The outer cover (305) comprises a tail pipe (3056), wherein the tail pipe (3056) is arranged at the second end of the outer cover (305), and the radius of the outlet of the tail pipe (3056) is smaller than the radius of the inner side thereof.

9. The underwater human-powered propulsion device according to claim 7, characterized in that: A protective net is provided at the first end or / and the second end of the outer cover (305), the protective net having a plurality of mesh holes, and the outer edge of the protective net is connected to the inner wall of the outer cover (305).

10. The underwater human-powered propulsion device according to claim 3 or 6, characterized in that: The first end of the fixed shaft (102) faces the thrust direction of the propeller; The first end of the fixed shaft (102) is provided with a middle tube (101), one end of the middle tube (101) is connected to the first end of the fixed shaft (102), and the fixed shaft (102) and the middle tube (101) are optionally provided with an angle α, so that the middle tube (101) and the power structure and the drive structure are arranged in accordance with ergonomics; or / and The first end of the fixed shaft (102) is provided with a handle (105); or / and A telescopic upper tube (103) is provided at the first end of the fixed shaft (102).

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