Semi-submerged paddle mechanism and boat with same

Abstract

The invention discloses a semi-submerged oar mechanism and discloses a boat with the semi-submerged oar mechanism, the semi-submerged oar mechanism comprises a mounting body, a deflection block, a lifting frame, a buoyancy tank, a transmission shaft, a connecting shaft, a buoyancy adjusting unit and an inclination angle adjusting unit, the deflection block is rotatably connected to the mounting body, the lifting frame is slidably connected to the deflection block in the vertical direction, and the buoyancy tank is slidably connected to the deflection block in the vertical direction. The buoyancy box is connected to the lower end of the lifting frame and used for providing buoyancy for the lifting frame, the transmission shaft is rotationally connected to the lifting frame, one end of the transmission shaft is connected with the propeller, one end of the connecting shaft is in transmission connection with the other end of the transmission shaft through a first universal joint, and the other end of the connecting shaft is in transmission connection with a second universal joint. The second universal joint is used for being in transmission connection with a power piece, the buoyancy adjusting unit communicates with the buoyancy box, the inclination angle adjusting unit is arranged on the mounting body and connected with the deflection block, the buoyancy box is arranged, the lifting frame is lifted through buoyancy, and the propeller has multiple forms to meet different navigation requirements.

Description

Technical Field

[0001] The invention relates to a boat propulsion device, and in particular to a semi-submerged propeller mechanism and a boat having the same. Background Art

[0002] A semi-submerged propeller is a propeller that can operate normally while partially exposing its blades to the water when sailing at high speeds. This type of propeller is often used in speedboats and fishermen's boats.

[0003] The existing semi-submerged paddle only adjusts the propeller's entry and exit of water in an arc, or only adjusts the propeller up and down in the vertical direction. When the boat load changes or is affected by wind and waves, the existing semi-submerged paddle needs to be manually adjusted in height, which is very troublesome. In addition, the existing semi-submerged paddle has few adjustment and driving methods and has certain limitations in use. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a semi-submerged propeller mechanism that can adapt to the sailing conditions of the boat and increase the adjustment method of the propeller to facilitate adjustment.

[0005] The present invention also provides a boat having the semi-submerged propeller mechanism.

[0006] A semi-submerged propeller mechanism according to an embodiment of the first aspect of the present invention comprises a mounting body, a deflection block, a lifting frame, a buoyancy box, a transmission shaft, a connecting shaft, a buoyancy adjustment unit and an inclination adjustment unit, the deflection block is rotatably connected to the mounting body, the lifting frame is vertically slidably connected to the deflection block, the buoyancy box is connected to the lower end of the lifting frame, the buoyancy box is used to provide buoyancy to the lifting frame, the transmission shaft is axially rotatably connected to the lifting frame, one end of the transmission shaft is connected to the propeller, one end of the connecting shaft is connected to the other end of the transmission shaft through a first universal joint, the other end of the connecting shaft is connected to a rotating power part through a second universal joint, the buoyancy adjustment unit is connected to the buoyancy box, the buoyancy adjustment unit is used to inflate or inhale the buoyancy box, and the inclination adjustment unit is arranged on the mounting body, the inclination adjustment unit is connected to the deflection block, and the inclination adjustment unit is used to adjust the rotation angle of the deflection block.

[0007] At least the following beneficial effects are provided: the semi-submerged propeller mechanism uses buoyancy to raise and lower the lifting frame by setting a buoyancy box, and because the lifting frame is connected to the transmission shaft and the propeller, the buoyancy box can drive the propeller to rise and fall, and the set deflection block connects the lifting frame, and when the deflection block is deflected, the lifting frame can deflect with the propeller, thereby realizing the lifting and deflection of the propeller, so that the propeller has a variety of forms to adapt to different navigation requirements, and the set buoyancy box cooperates with the buoyancy adjustment unit so that at the beginning, the buoyancy of the buoyancy box is just enough to allow half of the propeller to be immersed in water, and when the buoyancy adjustment unit is used for inflation and deflation, the lifting and lowering of the propeller can be adjusted. distance, the inclination adjustment unit is arranged to facilitate adjustment of the pitch angle of the propeller, and combined with the lifting and lowering adjustment of the pontoon, multi-mode and multi-way adjustment of the propeller is realized. In the initial state of the semi-submerged propeller mechanism, the lifting frame is in a vertical state, and the propeller is in a horizontal state and half immersed, and can be self-adaptive to lifting and lowering, that is, after the boat load changes or is affected by wind and waves, the propeller and the lifting frame can also be automatically lifted and lowered and can still be half immersed. This is the most common usage scenario. Due to the need to adjust the speed, the inclination adjustment unit is used to adjust the inclination of the propeller. Because the inclination angle is changed, the initial balance is broken, and then the pontoon needs to be inflated and deflated to actively change the buoyancy so that the propeller is half immersed again, to achieve coordinated adjustment and reach a new balance, and the new balance can adapt to changes in the boat load or the influence of wind and waves.

[0008] According to some embodiments of the present invention, the buoyancy box includes a connecting plate and a folding airbag, the connecting plate is connected to the lower end of the lifting frame, the folding airbag is sealingly connected to the lower end of the connecting plate, the buoyancy adjusting unit is connected to the folding airbag, and the buoyancy box has a simple structure. The connecting plate is convenient for connecting to the lifting frame and also for unfolding the folding airbag.

[0009] According to some embodiments of the present invention, a bottom plate is provided at the lower end of the folding airbag, and a bottom contact wheel is connected to the bottom plate. The height of the bottom contact wheel is lower than the height of the propeller. The bottom contact wheel is used to contact the bottom of the water. The bottom plate is provided to facilitate the installation of the bottom contact wheel. When the bottom contact wheel faces the bottom slope, the deflection block can be pushed and offset to make the propeller raise its head and avoid the propeller touching the bottom.

[0010] According to some embodiments of the present invention, the buoyancy regulating unit includes an air box and a piston, wherein the air box is arranged on the mounting body, and the piston is slidably connected to the inner cavity of the air box, and the piston divides the inner cavity of the air box into an air cavity and a power cavity, and the air cavity is connected to the folding airbag through a hose, and the piston is connected to the inner wall of the air box through a spring, and the spring is accommodated in the power cavity, and the spring is used to drive the piston to a predetermined position, and the power cavity is externally connected to a driving air source, and the driving air source is used to drive the piston to move. The buoyancy regulating unit has a simple structure, and the spring is used to maintain the position of the piston, thereby ensuring that a predetermined amount of gas is filled in the folding airbag, maintaining a semi-immersed state of the propeller, and at the same time, the folding airbag can also rely on the spring to reset when it fluctuates.

[0011] According to some embodiments of the present invention, the inclination adjustment unit includes a bracket, a push rod, a driving screw and a handwheel, the bracket is arranged on the mounting body, the push rod is slidably connected to the bracket, one end of the push rod is configured to push the deflection block, the other end of the push rod is threadedly connected to the driving screw, one end of the driving screw is rotatably connected to the bracket, and the other end of the driving screw is connected to the handwheel, and the inclination adjustment unit utilizes the push rod and the driving screw to realize stepless adjustment of the deflection block, so as to actively drive the deflection block to deflect.

[0012] According to some embodiments of the present invention, a connecting arm is hinged on the deflection block, and the connecting arm is detachably hinged to one end of the push rod. The provision of the connecting arm allows a higher degree of freedom in the connection between the deflection block and the push rod, thereby facilitating the rotation of the deflection block.

[0013] According to some embodiments of the present invention, a locking member is further included, wherein the locking member is disposed on the mounting body and is used to lock the deflection block.

[0014] According to some embodiments of the present invention, the deflection block is connected to a rotating shaft, and the rotating shaft is rotatably connected to the mounting body. The locking member includes a brake pad, and the brake pad is covered on the rotating shaft. The brake pad is transmission-connected to a brake power member, and the brake power member drives the brake pad to brake the rotating shaft. The locking member has a simple structure and is convenient for locking the deflection block to position the angle of the propeller.

[0015] According to some embodiments of the present invention, a receiving groove is provided at the upper end of the lifting frame, and the receiving groove is used to receive a counterweight block.

[0016] A boat according to an embodiment of the second aspect of the present invention comprises a hull and the semi-submerged propeller mechanism, wherein the mounting body is arranged on the hull.

[0017] At least the following beneficial effects are achieved: the boat has all the beneficial effects brought about by the above-mentioned semi-submerged propeller mechanism, which will not be described repeatedly here.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 It is a structural schematic diagram of a propeller of a semi-submerged propeller mechanism according to an embodiment of the present invention in a semi-submerged posture; Figure 2 It is a structural schematic diagram of the propeller deflection in a semi-submerged posture of the semi-submerged propeller mechanism according to an embodiment of the present invention; Figure 3 It is a schematic diagram of the bottoming wheel of the semi-submerged paddle mechanism in the working state according to an embodiment of the present invention; Figure 4 for Figure 1 The enlarged view of point A in the middle; Figure 5 for Figure 1 A schematic diagram showing the combination of the locking member of a semi-submerged propeller and the rotating shaft is shown.

[0020] Mounting body 100; Deflection block 200, connecting arm 210, rotating shaft 220; Lifting frame 300, accommodating tank 310; The floating box 400, the connecting plate 410, the folding airbag 420, the bottom plate 430, and the bottom contact wheel 440; Transmission shaft 500, connecting shaft 600, first universal joint 610, second universal joint 620; Buoyancy adjustment unit 700, air filling box 710, air cavity 711, power cavity 712, spring 713, piston 720; Inclination adjustment unit 800, bracket 810, push rod 820, drive screw 830, hand wheel 840; Locking member 900 and brake pad 910 . DETAILED DESCRIPTION

[0021] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0022] In the description of the present invention, if there is a description of first and second, it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0023] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0024] Reference Figures 1 to 5 The present invention discloses a semi-submerged paddle mechanism, comprising a mounting body 100, a deflection block 200, a lifting frame 300, a buoyancy box 400, a transmission shaft 500, a connecting shaft 600, a buoyancy adjustment unit 700 and an inclination adjustment unit 800, wherein the deflection block 200 is rotatably connected to the mounting body 100; the lifting frame 300 is vertically slidably connected to the deflection block 200; the buoyancy box 400 is connected to the lower end of the lifting frame 300, and the buoyancy box 400 is used to provide buoyancy to the lifting frame 300; the transmission shaft 500 is rotatably connected to the lifting frame 300 around its own axis, and the transmission shaft 500 is connected to the lifting frame 300. One end of the driving shaft 500 is connected to the propeller; one end of the connecting shaft 600 is connected to the other end of the driving shaft 500 through a first universal joint 610, and the other end of the connecting shaft 600 is connected to the rotating power part through a second universal joint 620; the buoyancy adjustment unit 700 is connected to the buoyancy tank 400, and the buoyancy adjustment unit 700 is used to inflate or inhale the buoyancy tank 400; the inclination adjustment unit 800 is arranged on the mounting body 100, and the inclination adjustment unit 800 is connected to the deflection block 200, and the inclination adjustment unit 800 is used to adjust the inclination angle of the deflection block 200.

[0025] Reference Figure 1One end of the connecting shaft 600 is connected to the other end of the transmission shaft 500 through a first universal joint 610, and the other end of the connecting shaft 600 is connected to a second universal joint 620, and the second universal joint 620 is used to connect the power parts, the buoyancy adjustment unit 700 is connected to the floating box 400, and the buoyancy adjustment unit 700 is used to inflate or inhale the floating box 400, and the inclination adjustment unit 800 is arranged on the mounting body 100, and the inclination adjustment unit 800 is connected to the deflection block 200, and the inclination adjustment unit 800 is used to adjust the rotation angle of the deflection block 200. It should be noted that the first universal joint 610, the second universal joint 620 and the connecting shaft 600 are used to realize universal transmission of power, so as to avoid the failure of power transmission during the lifting and deflection of the propeller. The deflection realizes a small angle of deflection and change, and the deflection angle is between -10° and 10°. Therefore, the displacement of the connecting shaft 600 is correspondingly only a small displacement. In order to avoid the universal joint transmission part being immersed in water, a waterproof cover can be provided and connected to the lifting frame 300. The first universal joint 610 is sealed by the waterproof cover, and the transmission part entering the water is provided with an anti-corrosion layer, such as an electroplated nickel layer or an electroplated chromium layer. The transmission part can also be protected by cathodic protection. In addition, because a waterproof cover is provided, applying grease on the first universal joint 610 will facilitate smooth transmission.

[0026] In addition, the buoyancy adjustment unit 700 can also be completely replaced by an air pump, so that the motor part of the air pump is connected to a controller. The controller is a commonly used controller, which mainly controls the start, stop and reversal of the motor part of the air pump. By utilizing this control relationship, the buoyancy tank 400 can be inflated or inhaled, and the position of the propeller can be determined by observation to see whether it meets the navigation requirements.

[0027] It should be understood that the present application sets a buoyancy box 400 to raise and lower the lifting frame 300 by utilizing buoyancy. Since the lifting frame 300 is connected to the transmission shaft 500 and the propeller, the buoyancy box 400 can drive the propeller to rise and fall. The set deflection block 200 connects the lifting frame 300. When the deflection block 200 is deflected, the lifting frame 300 can deflect with the propeller. Thus, the lifting and deflection of the propeller can be realized, so that the propeller has a variety of forms to adapt to different navigation requirements. The set buoyancy box 400 and the buoyancy adjustment unit 700 cooperate so that the buoyancy of the buoyancy box 400 can just allow half of the propeller to be immersed in water at the beginning. When the buoyancy adjustment unit 700 is used for inflation and deflation, the lifting distance of the propeller can be adjusted. The set inclination adjustment unit 800 facilitates the adjustment of the pitch angle of the propeller. Combined with the lifting and lowering adjustment of the buoyancy box 400, multi-mode and multi-method adjustment of the propeller can be realized.

[0028] It should be noted that in the initial state of the semi-submerged propeller mechanism, the lifting frame 300 is in a vertical state, and the propeller is in a horizontal state and half immersed, and can be raised and lowered adaptively, that is, after the boat load changes or is affected by wind and waves, the propeller and the lifting frame can also automatically rise and fall and can still be half immersed. This is the most common usage scenario. Due to the need to adjust the speed, the inclination adjustment unit is used to adjust the inclination of the propeller. Because the inclination angle is changed, the initial balance is broken, and then the buoyancy needs to be actively changed by inflating and deflating the float 400 so as to make the propeller half immersed again, realize coordinated adjustment, and reach a new balance. Moreover, the new balance can adapt to changes in the boat load or be affected by wind and waves.

[0029] It can be understood that, because the lifting frame 300 is connected to the transmission shaft 500 and the propeller, the thrust brought by the propeller can be transmitted to the lifting frame 300, and the lifting frame 300 can transmit the force to the deflection block 200, and the deflection block 200 can transmit the force to the rotating shaft 220, and the rotating shaft 220 is connected to the installation body 100, so the entire installation body 100 can transmit the force to the boat.

[0030] In some embodiments, the buoyancy box 400 includes a connecting plate 410 and a folding airbag 420. The connecting plate 410 is connected to the lower end of the lifting frame 300. The folding airbag 420 is sealed and connected to the lower end of the connecting plate 410. The buoyancy adjustment unit 700 is connected to the folding airbag 420. The buoyancy box 400 has a simple structure. The connecting plate 410 facilitates the connection to the lifting frame 300 and also facilitates the deployment of the folding airbag 420. It should be noted that the folding airbag 420 is an airbag that can be folded vertically, and the outside of the folding airbag 420 is coated with an anti-corrosion layer.

[0031] It should be noted that a bottom plate 430 is provided at the lower end of the folded airbag 420, and a bottom-touching wheel 440 is connected to the bottom plate 430. The height of the bottom-touching wheel 440 is lower than the height of the propeller. The bottom-touching wheel 440 is used to contact the bottom of the water. The provided bottom plate 430 is convenient for installing the bottom-touching wheel 440. When the provided bottom-touching wheel 440 faces the bottom slope, it can push the deflection block 200 to deflect, so that the propeller is tilted back to avoid the propeller touching the bottom. It should be understood that the bottom-touching wheel 440 needs to contact the restriction on the deflection block 200 when in use, so that the deflection block 200 can deflect freely. At this time, the bottom-touching wheel 440 relatively close to the bottom slope It can make contact first, thereby pushing the deflection block 200 to deflect, so that the propeller can swing up, and avoid the propeller from contacting and colliding with the sand and stones on the bottom of the water. Of course, during the launching of the boat, the bottoming wheel 440 can provide certain support to protect the propeller. In some other embodiments, the bottoming wheel 440 can be completely removed, or the bottoming wheel 440 can be replaced with a bottoming rod. The bottoming rod can also achieve the corresponding technical effect, and the buoyancy can be increased by inflating the folding airbag 420, so that the propeller floats up and avoids touching the bottom. At this time, there is no need to fix the deflection block 200, so that the propeller can float up adaptively.

[0032] In some embodiments, the buoyancy regulating unit 700 includes an inflatable box 710 and a piston 720. The inflatable box 710 is arranged on the mounting body 100. The piston 720 is slidably connected to the inner cavity of the inflatable box 710. The piston 720 divides the inner cavity of the inflatable box 710 into an air cavity 711 and a power cavity 712. The air cavity 711 is connected to the folded airbag 420 through a hose. The piston 720 is connected to the inner wall of the inflatable box 710 through a spring 713. The spring 713 is accommodated in the power cavity 712. The spring 713 is used to drive the piston 72 0 is in a predetermined position, the power chamber 712 is externally connected to a driving gas source, and the driving gas source is used to drive the piston 720 to move. The buoyancy adjustment unit 700 has a simple structure, and uses a spring 713 to maintain the position of the piston 720, so as to ensure that a predetermined amount of gas is filled in the folded airbag 420, and the propeller is kept in a semi-immersed state. At the same time, when the folded airbag 420 fluctuates, it can also be reset by relying on the spring 713. It can be understood that the so-called predetermined position is that the piston 720 can just allow the folded airbag 420 to maintain a predetermined amount of gas, so that The propeller just achieves a semi-immersed state, and the spring 713 is used to achieve dynamic balance of the air volume in the folded airbag 420. Of course, after the angle and depth are adjusted, the deflection block 200 needs to be locked. In addition, an additional locking mechanism can be added to lock the lifting frame 300, for example, a plug is set to plug the gap where the lifting frame 300 slides, or a tightening bolt is set on the deflection block 200, and the lifting frame 300 is tightened by the tightening bolt or the lifting frame 300 is directly threaded by the tightening bolt, so as to fix the lifting frame 300; In addition, when the lifting frame 300 is not fixed, the propeller can be kept in a semi-submerged state because a predetermined amount of gas is filled in the folding airbag 420. During navigation, the folding airbag 420 rises and falls with the waves, and the propeller can quickly return to the semi-submerged state due to the existence of buoyancy. This process simulates manual operation of the propeller to maintain the semi-submerged state. In addition, a damping pad can be provided at the sliding connection between the lifting frame 300 and the deflection block 200, so that the sliding of the lifting frame 300 in the deflection block 200 presents a damped sliding.

[0033] It can be understood that the driving air source is a common air pump.

[0034] Reference Figure 2 The inclination adjustment unit 800 includes a bracket 810, a push rod 820, a driving screw 830 and a hand wheel 840. The bracket 810 is arranged on the mounting body 100, and the push rod 820 is slidably connected to the bracket 810. One end of the push rod 820 is configured to push the deflection block 200, and the other end of the push rod 820 is threadedly connected to the driving screw 830. One end of the driving screw 830 is rotatably connected to the bracket 810, and the other end of the driving screw 830 is connected to the hand wheel 840. The inclination adjustment unit 800 utilizes the push rod 820 and the driving screw 830 to realize stepless adjustment of the deflection block 200, so as to actively drive the deflection block 200 to deflect.

[0035] In some embodiments, a connecting arm 210 is hinged on the deflection block 200, and the connecting arm 210 is detachably hinged to one end of the push rod 820. The setting of the connecting arm 210 allows the connection between the deflection block 200 and the push rod 820 to have a higher degree of freedom, which facilitates the rotation of the deflection block 200.

[0036] Reference Figure 3 , and further includes a locking member 900 , which is disposed on the mounting body 100 , and is used to lock the deflection block 200 .

[0037] In some embodiments, the deflection block 200 is connected to the rotating shaft 220, and the rotating shaft 220 is rotatably connected to the installation body 100. The locking member 900 includes a brake pad 910, which is covered on the rotating shaft 220. The brake pad 910 is connected to a brake power member in a transmission manner, and the brake power member drives the brake pad 910 to brake the rotating shaft 220. The locking member 900 has a simple structure and is convenient for locking the deflection block 200 to position the angle of the propeller. It can be understood that the brake pad 910 is installed on the clamping hoop, and the clamping hoop clamps the rotating shaft 220. The open end of the clamping hoop is provided with bolts and nuts. The clamping of the clamping hoop is achieved by tightening the bolts and nuts. The bolts are connected to the installation body 100. The brake power member is a common motor. The rotating shaft of the motor is connected to the nut in a transmission manner. The motor outputs torque to screw the nut into the bolt, thereby achieving the clamping of the clamping hoop and making the brake pad 910 brake the rotating shaft 220.

[0038] It should be noted that a receiving groove 310 is provided at the upper end of the lifting frame 300, and the receiving groove 310 is used to receive a counterweight.

[0039] A boat according to an embodiment of the second aspect of the present invention includes a hull and a semi-submerged propeller mechanism, and a mounting body 100 is disposed on the hull.

[0040] At least the following beneficial effects are achieved: the boat has all the beneficial effects brought about by the above-mentioned semi-submerged propeller mechanism, which will not be described repeatedly here.

[0041] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0042] Of course, the present invention is not limited to the above-mentioned embodiments, and those skilled in the art may make equivalent modifications or substitutions without violating the spirit of the present invention, and these equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A semi-submerged paddle mechanism, characterized in that: include: Mounting body (100); A deflection block (200) rotatably connected to the mounting body (100); A lifting frame (300) is slidably connected to the deflection block (200) in a vertical direction; A buoyancy box (400) connected to the lower end of the lifting frame (300), the buoyancy box (400) being used to provide buoyancy to the lifting frame (300); A transmission shaft (500) is connected to the lifting frame (300) so as to rotate around its own axis, and one end of the transmission shaft (500) is connected to a propeller; A connecting shaft (600), one end of which is transmission-connected to the other end of the transmission shaft (500) via a first universal joint (610), and the other end of the connecting shaft (600) is transmission-connected to a rotating power component via a second universal joint (620); A buoyancy regulating unit (700) connected to the buoyancy box (400), the buoyancy regulating unit (700) being used to inflate or inhale air from the buoyancy box (400); An inclination adjustment unit (800) is arranged on the mounting body (100), the inclination adjustment unit (800) is connected to the deflection block (200), and the inclination adjustment unit (800) is used to adjust the inclination angle of the deflection block (200).

2. A semi-submerged paddle mechanism according to claim 1, characterized in that: The buoyancy box (400) comprises a connecting plate (410) and a folding airbag (420), wherein the connecting plate (410) is connected to the lower end of the lifting frame (300), the folding airbag (420) is sealedly connected to the lower end of the connecting plate (410), and the buoyancy regulating unit (700) is connected to the folding airbag (420).

3. A semi-submerged paddle mechanism according to claim 2, characterized in that: A bottom plate (430) is provided at the lower end of the folding airbag (420), and a bottom contact wheel (440) is connected to the bottom plate (430). The height of the bottom contact wheel (440) is lower than the height of the propeller, and the bottom contact wheel (440) is used to contact the bottom of the water.

4. A semi-submerged paddle mechanism according to claim 3, characterized in that: The buoyancy regulating unit (700) comprises an air-filling box (710) and a piston (720), wherein the air-filling box (710) is arranged on the mounting body (100), and the piston (720) is slidably connected to the inner cavity of the air-filling box (710), and the piston (720) divides the inner cavity of the air-filling box (710) into an air cavity (711) and a power cavity (712), wherein the air cavity (711) is connected to the folding airbag (420) via a hose, and the piston (720) is connected to the inner wall of the air-filling box (710) via a spring (713), and the spring (713) is accommodated in the power cavity (712), and the spring (713) is used to drive the piston (720) to a predetermined position, and the power cavity (712) is externally connected to a driving air source, and the driving air source is used to drive the piston (720) to move.

5. A semi-submerged paddle mechanism according to claim 4, characterized in that: The tilt adjustment unit (800) comprises a bracket (810), a push rod (820), a driving screw rod (830) and a hand wheel (840); the bracket (810) is arranged on the mounting body (100); the push rod (820) is slidably connected to the bracket (810); one end of the push rod (820) is configured to push the deflection block (200); the other end of the push rod (820) is threadedly connected to the driving screw rod (830); one end of the driving screw rod (830) is rotatably connected to the bracket (810); and the other end of the driving screw rod (830) is connected to the hand wheel (840).

6. A semi-submerged paddle mechanism according to claim 5, characterized in that: A connecting arm (210) is hingedly connected to the deflection block (200), and the connecting arm (210) is detachably hingedly connected to one end of the push rod (820).

7. A semi-submerged paddle mechanism according to any one of claims 1 to 6, characterized in that: It also comprises a locking member (900), wherein the locking member (900) is arranged on the mounting body (100), and the locking member (900) is used to lock the deflection block (200).

8. A semi-submerged paddle mechanism according to claim 7, characterized in that: The deflection block (200) is connected to a rotating shaft (220), and the rotating shaft (220) is rotatably connected to the mounting body (100). The locking member (900) includes a brake pad (910), and the brake pad (910) is coated on the rotating shaft (220). The brake pad (910) is transmission-connected to a brake power member, and the brake power member drives the brake pad (910) to brake the rotating shaft (220).

9. A semi-submerged paddle mechanism according to claim 1, characterized in that: The upper end of the lifting frame (300) is provided with a receiving groove (310), and the receiving groove (310) is used to receive a counterweight block.

10. A boat, characterized in that: It comprises a hull and a semi-submerged propeller mechanism according to any one of claims 1 to 9, wherein the mounting body (100) is arranged on the hull.

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