Rudder device, propelling system and kayak

Abstract

The utility model provides a rudder device, a propelling system and a kayak. The rudder device is used for a propelling system of the kayak, and the propelling system comprises a rotatable main shaft and a propeller device in transmission connection with the main shaft. The rudder device comprises a sleeve and a sleeve driving piece, and the sleeve is arranged outside the main shaft in a sleeving mode and can rotate relative to the main shaft; the sleeve driving piece is connected to the sleeve and can drive the sleeve to rotate. The propeller device comprises a propeller shell, a propeller shaft rotatably installed on the propeller shell and blades installed on the propeller shaft, the propeller shell is fixedly installed on the sleeve, and the blades are located on the side face of the main shaft. The rudder device can conveniently adjust the directions of advancing, retreating, turning and the like of the kayak, is convenient and labor-saving to use, and is easy to control steering.

Description

Technical Field

[0001] The utility model relates to the field of outdoor sports, and in particular to a rudder device, a propulsion system and a kayak. Background Art

[0002] There are two types of propulsion methods for existing pedal kayaks: one uses swinging fins to propel the kayak, and the other uses propellers to propel the kayak. In the propeller-propelled kayak, the main shaft is driven by human pedaling to drive the propeller to rotate, thereby propelling the kayak.

[0003] However, steering movements in pedal kayaks, such as forward, backward, and turning, are currently primarily achieved using external paddles. For example, to turn left, the kayak manually paddles the right paddle; to turn right, the left paddle manually paddles the left paddle; and to move backward, the paddle is paddled backward with both hands. Changing direction by paddling is not only cumbersome and laborious, but also difficult to control, especially when the kayak is traveling at high speeds, where it is even more difficult to control the desired angle. Summary of the Invention

[0004] The main purpose of the present invention is to overcome at least one of the above-mentioned defects of the prior art and to provide a rudder device that is easy to use, saves effort, and has easy steering control, as well as a propulsion system and a kayak equipped with the rudder device.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] According to one aspect of the present invention, a rudder device is used in a propulsion system for a kayak, the propulsion system comprising a rotatable main shaft and a propeller device drivingly connected to the main shaft. The rudder device comprises a sleeve and a sleeve driver, wherein the sleeve is mounted on the outside of the main shaft and rotates relative to the main shaft; the sleeve driver is connected to the sleeve and can drive the sleeve to rotate. The propeller device comprises a paddle housing, a paddle shaft rotatably mounted to the paddle housing, and a paddle blade mounted to the paddle shaft, wherein the paddle housing is fixedly mounted to the sleeve.

[0007] According to one embodiment of the present invention, a first bevel gear is installed at the bottom end of the main shaft, and a second bevel gear that can mesh with the first bevel gear is installed on the propeller shaft.

[0008] According to one embodiment of the present invention, the main shaft is arranged vertically, and the propeller shaft is arranged horizontally; the propeller housing is fixed to the sleeve by bolts.

[0009] According to one embodiment of the present invention, a transmission assembly is further included, and the sleeve driving member drives the sleeve to rotate through the transmission assembly.

[0010] According to one embodiment of the present invention, the sleeve drive member includes a transmission rod and a gripping portion fixedly connected to the upper end of the transmission rod; the transmission assembly includes a first steering wheel fixedly mounted on the lower end of the transmission rod, a second steering wheel fixedly mounted on the sleeve, and a transmission belt sleeved on the first steering wheel and the second steering wheel.

[0011] According to one embodiment of the present invention, the gripping portion is a steering wheel or a handle.

[0012] According to another aspect of the present invention, a propulsion system includes a shell and a drive device, wherein the upper end of the main shaft is rotatably mounted on the shell, the drive device is mounted on the shell and is transmission-connected to the main shaft, and the propulsion system also includes the rudder device described in the present invention, wherein the sleeve of the rudder device is rotatably mounted on the shell.

[0013] According to one embodiment of the present invention, the driving device is a human-powered driving device provided on the housing.

[0014] According to one embodiment of the present invention, two guide rails are provided on both sides of the shell, two sliders are matched in the two guide rails, and two slide grooves are provided on the shell corresponding to the positions of the two guide rails; the human-powered driving device includes two pedals, a first one-way bearing and a second one-way bearing installed on the main shaft and with the same driving direction, a first transmission wheel, a second transmission wheel and multiple idler wheels installed on the shell, and a total transmission belt, a first transmission belt and a second transmission belt, wherein the total transmission belt is a double-sided toothed belt or a chain, the inner side of the total transmission belt is sleeved on the outer side of the first transmission wheel and multiple idler wheels, the second transmission wheel is matched with the outer side of the total transmission belt, the first transmission belt is sleeved on the first transmission wheel and the first one-way bearing, the second transmission belt is sleeved on the second transmission wheel and the second one-way bearing, the two sliders are connected to the total transmission belt, and the two pedals are respectively connected to the two sliders through the two slide grooves.

[0015] According to one embodiment of the present invention, the first transmission wheel, the second transmission wheel and the plurality of idler wheels are each mounted on the housing via a wheel axle, wherein at least one of the wheel axles of the first transmission wheel, the second transmission wheel and the plurality of idler wheels is hollow cylindrical; the sleeve drive member includes a transmission rod, which is passed through the hollow cylindrical wheel axle.

[0016] According to one embodiment of the present invention, the driving device is an electric driving device, which includes a motor mounted on the housing, a transmission wheel mounted on the main shaft, and a transmission belt sleeved on the output shaft of the motor and the transmission wheel.

[0017] According to yet another aspect of the present invention, a kayak includes the propulsion system of the present invention.

[0018] From the above technical solution, it can be seen that the advantages and positive effects of the rudder device proposed by the utility model are:

[0019] The rudder device proposed in the present invention includes a sleeve and a sleeve drive. The sleeve is mounted on the outside of a main shaft and is rotatable relative to the main shaft. The propeller housing of the propeller device is fixed to the sleeve, and the propeller blades are located on the side of the main shaft. Therefore, in the present invention, under the driving action of the sleeve drive, the sleeve can rotate 360 degrees, thereby driving the propeller device to rotate around the main shaft to any angle, conveniently adjusting the kayak's forward, backward, turning, and other directions. The rudder device is easy to use, saves effort, and has easy steering control. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The various objects, features, and advantages of the present invention will become more apparent by considering the following detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. The accompanying drawings are merely illustrative illustrations of the present invention and are not necessarily drawn to scale. In the drawings, the same reference numerals represent the same or similar parts throughout.

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the rudder device of the present invention.

[0022] Figure 2 yes Figure 1 The rudder device shown is a schematic diagram of the three-dimensional structure after the propeller device is rotated 180 degrees.

[0023] Figure 3 It is a schematic diagram of the three-dimensional structure of the first embodiment of the propulsion system of the present utility model.

[0024] Figure 4 yes Figure 3 The diagram shows a partially cutaway perspective structural diagram of the first embodiment of the propulsion system, in which the housing is hidden.

[0025] Figure 5 yes Figure 3 A top view of a first embodiment of the propulsion system is shown with the housing and rudder arrangement hidden.

[0026] Figure 6 3D is a schematic diagram of the three-dimensional structure of the second embodiment of the propulsion system, in which the shell is hidden. DETAILED DESCRIPTION

[0027] Typical embodiments that embody the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention can have various variations in different embodiments without departing from the scope of the present invention, and the description and drawings are essentially for illustrative purposes and are not intended to limit the present invention.

[0028] In the following description of different exemplary embodiments of the present invention, reference is made to the accompanying drawings, which form a part of the present invention and in which different exemplary structures, systems and steps that can implement various aspects of the present invention are shown by way of example. It should be understood that other specific schemes of components, structures, exemplary devices, systems and steps can be used, and structural and functional modifications can be made without departing from the scope of the present invention. When introducing the elements / components / etc. described and / or illustrated herein, the terms "comprising", "including" and "having" are used to express the meaning of open-ended inclusion and mean that in addition to the listed elements / components / etc., additional elements / components / etc. may be present.

[0029] Relative terms such as "lower" or "bottom" and "upper" or "top" may be used herein to describe the relationship of one element to another element, as shown in the figures. It should be understood that relative terms are intended to include different orientations of the device in addition to the orientation shown in the figures. For example, if the device in a figure is turned over, the element described as being "lower" or "bottom" of other elements will be oriented "upper" or "top" of the other elements. Thus, the exemplary term "lower" can include both "lower" and "top" orientations, and the term "bottom" can include both "bottom" and "top" orientations, depending on the particular orientation of the figure. Similarly, if the device in a figure is turned over, the element described as being "lower" or "bottom" of other elements will be oriented as being "upper" or "top" of the other elements. Thus, the exemplary terms "bottom" or "below" can include both "upper" and "lower" orientations.

[0030] Rudder device embodiment

[0031] See also Figure 1 and Figure 2 The rudder device of the present invention is used for a kayak, and is particularly used for a propulsion system of a kayak. The propulsion system includes a rotatable main shaft 110 and a propeller device 14 drivingly connected to the main shaft 110.

[0032] See also Figure 1 and Figure 4 The propeller device 14 includes a propeller shell 142, a propeller blade 141 and a propeller shaft 145 (see Figure 4 ).

[0033] The paddle housing 142 is fixedly mounted on the sleeve 155. The paddle housing 142 and the sleeve 155 can be fixed in various ways. For example, a bolt can be passed through the mounting hole 1420 on the paddle housing 142 and locked to the sleeve 155, allowing the paddle housing 142 to rotate synchronously with the sleeve 155. Other fixing methods known in the art are also acceptable, as long as the paddle housing 142 can be firmly fixed to the sleeve 155.

[0034] The paddle shaft 145 is rotatably mounted on the paddle housing 142, for example, supported by the paddle housing 142 via a bearing 1450. One end of the paddle shaft 145 extends out of the paddle housing 142, and the paddle blade 141 is mounted on the end of the paddle shaft 145 extending out of the paddle housing 142. The paddle blade 141 can be located on the side of the main shaft 110.

[0035] A first bevel gear 143 is mounted on the bottom end of the main shaft 110, and a second bevel gear 144 that can mesh with the first bevel gear 143 is mounted on the paddle shaft 145. In this embodiment, the main shaft 110 is vertically arranged, and the paddle shaft 145 is horizontally arranged.

[0036] The power of the main shaft 110 is transmitted to the propeller shaft 145 of the propeller device 14 through the cooperation of the first bevel gear 143 and the second bevel gear 144. The propeller shaft 145 rotates, driving the propeller blades 141 to rotate, thereby driving the kayak to move forward.

[0037] See also Figure 1 and Figure 2 The first embodiment of the rudder device of the present invention includes a sleeve 155, a sleeve driver and a transmission assembly. The sleeve 155 is sleeved on the outside of the main shaft 110 and can rotate relative to the main shaft 110; the upper end of the sleeve 155 can be rotatably mounted on a fixed object, such as through a bearing 1550 (see Figure 4 ) is mounted on the shell 16 of the kayak (see Figure 3 ).

[0038] The sleeve driving member is connected to the sleeve 155 and can drive the sleeve 155 to rotate. The sleeve driving member drives the sleeve 155 to rotate through the transmission assembly.

[0039] The specific structure of the sleeve drive can be varied. For example, the sleeve drive includes a transmission rod 150 and a grip 151 fixedly connected to the upper end of the transmission rod 150. The grip 151 can be a steering wheel or a handle. The transmission assembly includes a first steering wheel 153 fixedly mounted at the lower end of the transmission rod 150, a second steering wheel 154 fixedly mounted to the sleeve 155, and a transmission belt 152 sleeved around the first and second steering wheels 153, 154. The first and second steering wheels 153, 154 can be pulleys or sprockets, and the corresponding transmission belt 152 can be a belt or chain.

[0040] When the grip 151 is rotated, the transmission rod 150 rotates accordingly, the first steering wheel 153 fixed to the transmission rod 150 rotates, and the second steering wheel 154 is driven to rotate through the transmission belt 152, and the sleeve 155 fixedly connected to the second steering wheel 154 rotates, thereby rotating the propeller device 14 fixed to the sleeve 155.

[0041] In the present invention, the sleeve 155 can rotate 360° relative to the main shaft 110, so the propeller device 14 can rotate 360° relative to the main shaft 110, thereby realizing the steering of the kayak at any angle.

[0042] like Figure 1 As shown, the blades 141 of the propeller device 14 are located at the rear side of the main shaft 110. In this state, the blades 141 rotate to drive the kayak forward.

[0043] like Figure 2 As shown, when the grip 151 is rotated 180°, the blades 141 of the propeller device 14 also rotate 180°. At this time, the blades 141 of the propeller device 14 are located in front of the main shaft 110. In this state, the blades 141 rotate to drive the kayak backward.

[0044] The gripping portion 151 can be rotated at different angles to drive the blades 141 of the propeller device 14 to rotate at corresponding angles, thereby enabling the kayak to turn at corresponding angles.

[0045] In some other embodiments, the rudder device may not include a transmission assembly, but instead directly connect the sleeve driver to the sleeve 155. Any driver that can rotate the sleeve 155 may be applied to the present invention.

[0046] Propulsion system first embodiment

[0047] like Figure 3 ,and Figure 4 and Figure 5 As shown, the first embodiment of the propulsion system for a kayak of the present invention includes a housing 16 , a main shaft 110 , a human-powered driving device, a propeller device 14 and a rudder device 15 .

[0048] The housing 16 may include an upper housing 161 and a lower housing 162 connected to each other. A frame 100 is fixed within the housing 16. Left and right guide rails 1213 and 1216 are symmetrically disposed on the left and right sides of the frame 100. Left and right guide rails 1213 and 1216 correspond to left and right sliders 1212 and 1215. Two slidable slots 160 are symmetrically disposed on the left and right sides of the housing 16, corresponding to the left and right guide rails 1213 and 1216, respectively.

[0049] The main shaft 110 is rotatably mounted on the frame 100 , and the main shaft 110 can rotate around its own axis.

[0050] like Figure 4 and Figure 5 As shown, the driving device in the first embodiment of the propulsion system is a human-powered driving device, which is installed in the housing 16 and includes a left pedal 1211, a right pedal 1214, and a transmission assembly. The two pedals 1211 and 1214 are connected to the left slider 1212 and the right slider 1215 through the slide slots 160 on the left and right sides of the housing, respectively.

[0051] The transmission assembly includes a main belt 122, a first pulley 1231, a first belt 1232, a second pulley 1233, a second belt 1234, a first one-way bearing 1235, a second one-way bearing 1236, and a plurality of idler pulleys. The main belt 122 is a double-sided toothed belt. This transmission assembly is a belt drive assembly. In other embodiments, the belt drive assembly can be replaced by other types of drive assemblies, such as a chain drive assembly, where the belts and belt shafts are replaced by chains and sprockets, respectively.

[0052] The first one-way bearing 1235 and the second one-way bearing 1236 are mounted on the main shaft 110 , and the driving directions of the first one-way bearing 1235 and the second one-way bearing 1236 are the same (the idling directions are the same).

[0053] In this embodiment, the plurality of idler pulleys include a first idler pulley 20, a second idler pulley 21, and a third idler pulley 22. Each pulley and each idler pulley are mounted on the frame 100 via a wheel shaft. The main shaft 110 is located between the first pulley 1231, the second pulley 1233, the first idler pulley 20, and the second idler pulley 21 and the third idler pulley 22. For example, the first pulley 1231, the second pulley 1233, and the first idler pulley 20 are located at the rear side of the frame 100; the second idler pulley 21 and the third idler pulley 22 are located at the front side of the frame 100; and the main shaft 110 is located in the middle of the frame 100.

[0054] The axle of the second pulley 1233 can be hollow and cylindrical, so that the transmission rod 150 in the rudder device can pass through the axle of the second pulley 1233. This effectively reduces the occupied space without affecting their respective functions, which is conducive to the miniaturization of the kayak. Of course, in other embodiments, the axle of the first pulley 1231 or the axles of each idler wheel can also be designed as a hollow cylinder, so that the transmission rod 150 in the rudder device can be selectively passed through the axle of the first pulley 1231 or the axle of a certain idler wheel, which can also reduce the occupied space. The present utility model provides multiple possible settings for the transmission rod 150 and the grip portion 151, making the setting position of the grip portion 151 more flexible and convenient for operation.

[0055] The inner side of the main belt 122 is sleeved around the outer sides of the first pulley 1231, the first idler pulley 20, the second idler pulley 21, and the third idler pulley 22. The second pulley 1233 can be located between the first pulley 1231 and the first idler pulley 20, and is closer to the main shaft 110 than the first pulley 1231 and the first idler pulley 20. The second pulley 1233 is engaged with the outer side of the main belt 122. A tensioning device, such as a tensioning pulley 23, can also be provided on the housing frame 100 to maintain the main belt 122 in a taut state.

[0056] The first belt 1232 is sleeved on the outside of the first pulley 1231 and the first one-way bearing 1235 ; the second belt 1234 is sleeved on the outside of the second pulley 1233 and the second one-way bearing 1236 .

[0057] The left and right sliders 1212 and 1215 are connected to the main belt 122 on the left and right sides of the frame 100, respectively. When external force is applied to the left and right pedals 1211 and 1214, the left and right pedals 1211 and 1214 respectively drive the left and right sliders 1212 and 1215 to reciprocate within the left and right guide rails 1213 and 1216, respectively. This in turn drives the main belt 122 to rotate reciprocally clockwise and counterclockwise, which in turn drives the main shaft 110 to rotate via the first belt 1232 and second pulley 1233. This is described in detail below.

[0058] When the left pedal 1211 drives the left slider 1212 to move forward, for example, in the direction away from the first pulley 1231 (the corresponding right pedal 1214 moves backward), the total belt 122 connected to the left slider 1212 rotates clockwise, and the total belt 122 drives the first belt 1232 to rotate clockwise through the first pulley 1231, and then the first belt 1232 drives the main shaft 110 to rotate clockwise through the first one-way bearing 1235, and the main shaft 110 drives the propeller device 14 to rotate, and the propeller device 14 pushes the kayak forward; at the same time, in the process of the left pedal 1211 driving the total belt 122 forward through the left slider 1212, the total belt 122 drives the second belt 1234 to rotate counterclockwise through the second pulley 1233, and the second belt 1234 drives the second one-way bearing 1236 to rotate counterclockwise on the main shaft 110 without interfering with the rotation of the main shaft 110.

[0059] Similarly, when the right pedal 1214 drives the total belt 122 forward through the right slider 1215 (the corresponding left pedal 1211 moves backward), the total belt 122 rotates counterclockwise, driving the first idler pulley 20 to rotate counterclockwise, driving the second pulley 1233 to rotate clockwise, the second pulley 1233 drives the second belt 1234 to rotate clockwise, and then drives the second one-way bearing 1236 to rotate clockwise, driving the main shaft 110 to rotate clockwise, the main shaft 110 drives the propeller device 14 to rotate, and the propeller device 14 pushes the kayak forward; in this process, the total belt 122 drives the first belt 1232 to rotate counterclockwise through the second pulley 1233, and the first belt 1232 drives the first one-way bearing 1235 to rotate counterclockwise on the main shaft 110 without interfering with the rotation of the main shaft 110.

[0060] Therefore, in this human-powered drive device, whether the left pedal 1211 or the right pedal 1214 moves forward, the transmission assembly drives the main shaft 110 to rotate in the same direction (clockwise), thereby driving the kayak forward through the propeller assembly. Furthermore, during human-powered operation, the pedals reciprocate linearly along the guide rails, reducing fatigue for the user and improving the efficiency of human power conversion.

[0061] When the kayak needs to turn or move backward, as mentioned above, the rudder device can be operated to complete it.

[0062] The above only lists one type of human-powered drive device. Other types of human-powered drive devices, such as a human-powered drive device in which the pedals perform circular motion in a vertical plane, can also be combined with the rudder device of the present invention to form the propulsion system of the present invention.

[0063] Second embodiment of the propulsion system

[0064] like Figure 6 As shown, the second embodiment of the propulsion system for kayaks of the present invention is different from the first embodiment in that the human-powered drive device is replaced by an electric drive device.

[0065] The electric drive device includes a motor 131, a transmission belt 132 and a transmission wheel 133. The motor 131 is mounted on the frame 100 in the housing, the transmission wheel 133 is mounted on the main shaft 110, and the transmission belt 132 is sleeved around the output shaft of the motor 131 and the transmission wheel 133.

[0066] When motor 131 is started, its output shaft rotates drive wheel 133 via drive belt 132. Drive wheel 133 then rotates spindle 110, which in turn rotates propeller blades 141, thereby causing the kayak to move. In other embodiments, a driving wheel may be mounted on the output shaft of motor 131. In this case, drive belt 132 may be mounted around the driving wheel and drive wheel 133.

[0067] In the second embodiment of the propulsion system, the motor provides the power for the kayak movement, and the rudder device realizes the steering functions such as forward, backward, and turning.

[0068] Other structures of the second embodiment of the propulsion system, such as the housing 16, the main shaft 110, the propeller device 14 and the rudder device, are basically the same as those of the first embodiment of the propulsion system and will not be described again here.

[0069] Kayak Example

[0070] The kayak of the present invention comprises the propulsion system of the present invention.

[0071] The exemplary embodiments of the rudder device, propulsion system, and kayak proposed by the present invention are described and / or illustrated in detail above. However, the embodiments of the present invention are not limited to the specific embodiments described herein. Rather, the components and / or steps of each embodiment can be used independently and in combination with other components and / or steps described herein. Each component and / or each step of one embodiment can also be used in combination with other components and / or steps of other embodiments. When introducing the elements / components / etc. described and / or illustrated herein, the terms "a," "an," and "above" are used to indicate the presence of one or more elements / components / etc.

[0072] The embodiments of the present invention are not limited to the specific embodiments described herein. On the contrary, the components of each embodiment can be used independently and staggered with the other components described herein. Each component of an embodiment can also be used in combination with other components of other embodiments. In the description of this specification, the description of the terms "one embodiment", "some embodiments", "other embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the application embodiment. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0073] In the embodiments, the term "plurality" refers to two or more, unless otherwise specified. Terms such as "installed," "connected," "connected," and "fixed" should be interpreted broadly. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; "connected" can mean a direct connection or an indirect connection through an intermediary. Those skilled in the art will understand the specific meanings of these terms in the embodiments based on the specific circumstances.

[0074] While the present invention has been described with respect to various specific embodiments of the rudder device, propulsion system, and kayak, those skilled in the art will recognize that the invention can be practiced with modification within the spirit and scope of the claims.

Claims

1. A rudder device for a kayak propulsion system, the propulsion system comprising a rotatable main shaft and a propeller device drivingly connected to the main shaft, characterized in that: The rudder device comprises: a sleeve, sleeved on the outside of the main shaft and capable of rotating relative to the main shaft; and The sleeve driving member is connected to the sleeve and can drive the sleeve to rotate. The propeller device includes a propeller housing, a propeller shaft rotatably mounted on the propeller housing, and a propeller blade mounted on the propeller shaft, wherein the propeller housing is fixedly mounted on the sleeve.

2. The rudder device according to claim 1, characterized in that A first bevel gear is installed at the bottom end of the main shaft, and a second bevel gear that can mesh with the first bevel gear is installed on the propeller shaft.

3. The rudder device according to claim 1 or 2, characterized in that: It also includes a transmission assembly, and the sleeve driving member drives the sleeve to rotate through the transmission assembly.

4. The rudder device according to claim 3, characterized in that The sleeve drive member includes a transmission rod and a gripping portion fixedly connected to the upper end of the transmission rod; the transmission assembly includes a first steering wheel fixedly mounted on the lower end of the transmission rod, a second steering wheel fixedly mounted on the sleeve, and a transmission belt sleeved on the first steering wheel and the second steering wheel.

5. A propulsion system comprising a housing and a drive device, wherein the upper end of the main shaft is rotatably mounted on the housing, and the drive device is mounted on the housing and is in driving connection with the main shaft, characterized in that: It also includes a rudder device according to any one of claims 1 to 4, wherein the sleeve of the rudder device is rotatably mounted on the housing.

6. The propulsion system according to claim 5, characterized in that The driving device is a human-powered driving device arranged on the housing.

7. The propulsion system according to claim 6, wherein: Two guide rails are provided on both sides of the shell, and two sliders are matched in the two guide rails. Two slide grooves are provided on the shell corresponding to the positions of the two guide rails; the human-powered drive device includes two pedals, a first one-way bearing and a second one-way bearing installed on the main shaft and with the same driving direction, a first transmission wheel, a second transmission wheel and multiple idle wheels installed on the shell, and a total transmission belt, a first transmission belt and a second transmission belt, wherein the total transmission belt is a double-sided toothed belt or a chain, the inner side of the total transmission belt is sleeved on the outer side of the first transmission wheel and multiple idle wheels, the second transmission wheel is matched with the outer side of the total transmission belt, the first transmission belt is sleeved on the first transmission wheel and the first one-way bearing, the second transmission belt is sleeved on the second transmission wheel and the second one-way bearing, the two sliders are connected to the total transmission belt, and the two pedals are respectively connected to the two sliders through the two slide grooves.

8. The propulsion system according to claim 7, wherein: The first transmission wheel, the second transmission wheel and the plurality of idler wheels are each mounted on the housing via a wheel axle, wherein at least one of the wheel axles of the first transmission wheel, the second transmission wheel and the plurality of idler wheels is hollow cylindrical; the sleeve drive member includes a transmission rod, which is passed through the hollow cylindrical wheel axle.

9. The propulsion system according to claim 5, wherein: The driving device is an electric driving device, which includes a motor installed on the housing, a transmission wheel installed on the main shaft, and a transmission belt sleeved on the output shaft of the motor and the transmission wheel.

10. A kayak, characterized in that: Comprising a propulsion system as claimed in any one of claims 5 to 9.

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