A knob-type quick-release propeller device and a water sports board

Abstract

This invention relates to the field of electric hydrofoil technology, and discloses a knob-type quick-release propeller device and a water sports board, comprising: a drive shaft, a propeller, and a knob assembly. The knob assembly is used to lock the propeller onto the drive shaft. The knob assembly includes a knob plate, a baffle, an elastic element, and several locking blocks. The knob plate has a central through hole through which the drive shaft passes. The knob plate has an arc-shaped groove. One end of the elastic element is disposed on the side wall of the arc-shaped groove, and the other end is disposed on the baffle. The baffle has a central movable hole, and each locking block is movably accommodated within the central movable hole. This invention provides a knob-type quick-release propeller device and a water sports board. By setting up the knob plate, baffle, elastic element, and several locking blocks, quick assembly and disassembly can be achieved without the need for any tools, avoiding the problem of threaded connections becoming increasingly tight and difficult to disassemble.

Description

Technical Field

[0001] This invention relates to the field of electric hydrofoil technology, and particularly to a knob-type quick-release propeller device and a water sports board. Background Technology

[0002] Electric surfboards, also known as electric hydrofoils, have complex structures and numerous modules, requiring users to spend time and effort assembling and disassembling them, which is both time-consuming and laborious. If tools are forgotten or lost, assembly and disassembly become impossible, significantly impacting the user experience. Furthermore, most propeller fixing methods on the market use threaded fastening, which tightens due to inertia when the motor is running, becoming even more difficult to disassemble over time. To avoid or improve these issues and reduce the number of tools required and assembly / disassembly time, this invention proposes a knob-type quick-release propeller device. This device requires no tools and allows for easy and quick assembly and disassembly, even after prolonged use. Summary of the Invention

[0003] The purpose of this invention is to provide a knob-type quick-release propeller device and a water sports board to solve the problems mentioned in the background art.

[0004] The technical solution of the present invention to solve the above-mentioned technical problems is as follows:

[0005] A knob-type quick-release propeller device includes: a drive shaft, a propeller, and a knob assembly, wherein the knob assembly is used to lock the propeller onto the drive shaft;

[0006] The knob assembly includes a knob plate, a baffle, an elastic element, and several locking blocks. The knob plate has a central through hole, through which the drive shaft passes. The knob plate has an arc-shaped groove, one end of the elastic element is disposed on the side wall of the arc-shaped groove, and the other end of the elastic element is disposed on the baffle. The baffle has a central movable hole, and each locking block is movably accommodated within the central movable hole.

[0007] The drive shaft has an annular groove. When each locking block rotates with the rotating buckle plate, each locking block can retract into the annular groove or move outward, so that the knob assembly can be locked or unlocked on the drive shaft.

[0008] In one embodiment, each of the locking blocks and the annular groove are located on the same plane.

[0009] In one embodiment, the buckle plate has a plurality of travel holes, and each of the locking blocks is provided with an operating column. Each operating column is respectively located in each of the travel holes. When the locking block rotates with the buckle plate, the operating column can move within the travel hole to control the locking block to retract into the annular groove or move outward.

[0010] In one embodiment, a fixing through hole is provided on the buckle plate, and the fixing through hole communicates with the arc-shaped groove;

[0011] The baffle is provided with a vertical fixing block, which passes through the fixing through hole. One end of the elastic element is provided on the side wall of the arc-shaped groove, and the other end of the elastic element is provided on the vertical fixing block.

[0012] In one embodiment, the locking blocks are evenly distributed around the circumference.

[0013] In one embodiment, a hub head is further included, which is mounted on the knob assembly;

[0014] The buckle plate is provided with a first screw hole, the baffle is provided with a second screw hole, and the rotor head is provided with a third screw hole. The external fixing screws are fixed after passing through the first screw hole, the second screw hole, and the third screw hole.

[0015] In one embodiment, the drive shaft has a radial through hole, and a pin passes through the radial through hole.

[0016] In one embodiment, a drive motor is further included, which is connected to the drive shaft.

[0017] In one embodiment, the propeller includes a propeller body, a bushing, and a plurality of blades, each blade being mounted on the propeller body, the bushing being fitted onto the drive shaft, the propeller body being fitted onto the bushing, and a slot being provided on the propeller body, with the pin passing through the slot.

[0018] The propeller body is also provided with a positioning hole, and the baffle is provided with a positioning post, which passes through the positioning hole of the propeller body.

[0019] The present invention also provides a water sports board, including the knob-type quick-release propeller device as described above.

[0020] Compared with the prior art, the present invention has at least the following advantages:

[0021] 1. This invention relates to a knob-type quick-release propeller device and a water sports board. By incorporating a knob-type fastener, a baffle, an elastic element, and several locking blocks, it enables rapid assembly and disassembly without the need for any tools, avoiding the problem of threaded connections becoming increasingly tight and difficult to disassemble. Furthermore, placing the knob assembly at the top of the propeller not only prevents accidental disassembly due to accidental contact or collision, but also eliminates structural limitations based on the number of propeller blades, allowing for easy operation even with multiple blades.

[0022] 2. In the knob-type quick-release propeller device of the present invention, when the locking blocks rotate with the rotating buckle plate, each locking block can retract and move closer to the annular groove or diverge outward, so that the locking blocks of the knob assembly can lock or unlock on the annular groove of the transmission shaft, thereby making it convenient and quick to disassemble the propeller, avoiding the problem of traditional threaded connections becoming tighter with use, taking into account the convenience of installation and removal, and avoiding the problems of deformation or breakage after long-term use, thus improving safety and extending service life.

[0023] 3. This invention, through a press-type structure, enables the propeller to be quickly installed and removed from the drive shaft, solving the problem of threaded connections becoming increasingly tight and difficult to disassemble. Furthermore, the operating column on the locking block is positioned within the stroke hole. During the locking or unlocking process of the rotating buckle plate, the buckle plate moves the operating column through the stroke hole, thereby controlling the locking or unlocking function of the locking block. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of a knob-type quick-release propeller device according to one embodiment;

[0025] Figure 2 for Figure 1 An exploded view of the knob-type quick-release propeller assembly shown.

[0026] Figure 3 for Figure 1 A schematic diagram of the drive shaft of a knob-type quick-release propeller device is shown.

[0027] Figure 4 for Figure 1 A schematic diagram of the locking block of a knob-type quick-release propeller device is shown.

[0028] Figure 5 A schematic diagram of a knob-type quick-release propeller device according to another embodiment;

[0029] Figure 6 for Figure 1 A schematic diagram of the screw fastener plate of a knob-type quick-release propeller device is shown.

[0030] Figure 7 for Figure 1A schematic diagram of the structure of a knob-type quick-release propeller device is shown.

[0031] Figure 8 for Figure 1 A schematic diagram of the baffle of the knob-type quick-release propeller device shown;

[0032] Figure 9 (a) and (b) are schematic diagrams of the locked state of the knob-type quick-release propeller device;

[0033] Figure 10 (a) and (b) are schematic diagrams of the unlocked state of the knob-type quick-release propeller device. Detailed Implementation

[0034] It should be noted that, unless otherwise specified, the embodiments and features described in the embodiments of the present invention can be combined with each other. The technical solutions of the present invention will be further described below with reference to the accompanying drawings of the embodiments of the present invention. The present invention is not limited to the following specific embodiments.

[0035] It should be understood that the same or similar reference numerals in the accompanying drawings of the embodiments correspond to the same or similar components. In the description of this invention, it should be understood that if terms such as "upper," "lower," "front," "rear," "left," "right," "top," and "bottom" indicate orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, they are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms describing positional relationships in the accompanying drawings are for illustrative purposes only and should not be construed as limiting this patent. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0036] The propeller is fixed to the motor drive shaft, and it rotates around the shaft by the motor driving the drive shaft. From a mechanical point of view, for the propeller to achieve efficient and safe rotation, two points need to be guaranteed: first, the ability to withstand torque, and second, axial restraint.

[0037] Currently, there are two main types of propeller installation methods available on the market: fixed and quick-release.

[0038] In the fixed propeller mounting method, tools are needed to secure the propeller to the motor drive shaft. This structure typically involves a small radial through-hole on the motor shaft, through which a metal pin is inserted. A U-shaped groove is pre-drilled in the center of the propeller's bottom. During installation, the metal pin must be aligned with this U-shaped groove. The radial metal pin on the motor drive shaft and the U-shaped groove at the propeller's bottom serve to absorb torque. However, axial positioning requires structural fixation. This is generally achieved by using screws (with internal threads in the top hole of the motor drive shaft) or nuts (with external threads cut into the top of the motor drive shaft; nuts can be standard, bullet-shaped, or other shapes, but the core remains the internal thread) on one side of the propeller top for fixation. It is crucial to strictly control the axial length of the propeller. Once the top of the propeller is secured with screws / nuts, the surface of the metal pin should just meet the bottom of the U-shaped groove at the propeller's bottom, thus achieving axial positioning.

[0039] Secondly, quick-release propeller installation methods commonly found in the market typically involve axial limiting. This approach retains the fixed pin structure, continuing to transmit torque via the pin. A groove is cut around the top of the drive shaft, and axial limiting is achieved using a spring and sliding latch (in its natural state, the sliding latch is engaged in the drive shaft groove under spring force, achieving axial limiting; when disassembly is needed, pressing the sliding latch disengages it from the groove, allowing for easy removal). Another quick-release device simultaneously achieves torque reception and axial limiting. This approach also utilizes a sliding latch and spring, but unlike the former, the latter cleverly incorporates a protruding cylindrical structure within the sliding latch. This protruding cylinder replaces the pin in receiving torque (in its natural state, the protruding cylinder inserts into the drive shaft radial hole; pressing the sliding latch removes the protruding cylinder from the drive shaft radial hole).

[0040] Compared to fixed devices, quick-release devices offer the significant advantage of easy and convenient installation and removal, requiring no tools and eliminating concerns about threaded connections tightening over time and causing disassembly difficulties. Fixed devices, however, have a simpler structure (lower cost) and a more robust and reliable connection. However, quick-release devices also have several drawbacks. The sliding latch in the former only provides axial restraint. When positioned at the bottom of the propeller, the number of blades can limit its operation; with more than two blades, insufficient pressing space makes operation difficult. A sliding latch at the top of the propeller is prone to accidental activation or opening due to impact, posing a safety hazard. The sliding latch in the latter device both bears torque and provides axial restraint (withstanding axial force), making it susceptible to deformation and even breakage during use, resulting in a short fatigue life.

[0041] Based on the above problems, this invention proposes a knob-type quick-release propeller device. This device places the knob assembly on the top of the propeller, which avoids the problems of accidental activation or collision, and also avoids the limitations imposed by the number of propeller blades. At the same time, the quick-release structure design avoids disassembly difficulties and also avoids the problem of threaded connections becoming tighter with use. It takes into account the convenience of installation and removal, and can also avoid the problems of deformation or breakage after long-term use, thereby improving safety and extending service life.

[0042] Please see Figures 1-10 A knob-type quick-release propeller device includes: a drive shaft 101, a propeller 200, and a knob assembly 300. The knob assembly 300 is used to lock the propeller 200 onto the drive shaft 101. The knob-type quick-release propeller device also includes a drive motor 100 and a rotor hub 400. The rotor hub is mounted on the knob assembly, and the drive motor is connected to the drive shaft. It should be noted that the drive shaft 101 is used to mount the propeller 200, the knob assembly 300, and the rotor hub 400; the propeller 200 can be equipped with multiple blades, at least three, or even more, and is not structurally limited; the knob assembly 300 can be locked within an annular groove 104 of the drive shaft 101 to lock the position of the propeller 200; the drive motor is used to drive the drive shaft to rotate, thereby causing the propeller 200 and the knob assembly 300 to rotate.

[0043] Please see Figure 2 , Figure 5 and Figure 6The knob assembly 300 includes a knob plate 304, an elastic element 303, a baffle 302, and several locking blocks 301. The knob plate has a central through hole, through which the drive shaft passes. The knob plate 304 has an arc-shaped groove 341. One end of the elastic element is disposed on the side wall of the arc-shaped groove, and the other end is disposed on the baffle. The baffle has a central movable hole 321, within which each locking block is movably accommodated. It should be noted that the knob plate 304 is used to fix the elastic element 303 and connect the baffle 302. The elastic element 303 is used to connect the knob plate and the baffle, and also provides a restoring force for the rotation of the baffle. The baffle 302 is used to mount the knob assembly 300 on the propeller 200 and provides the locking block 301 with the central movable hole 321, so that it is limited within the central movable hole 321 during locking and unlocking operations. Specifically, multiple arc-shaped grooves 341 are arranged in a ring, and the number of elastic elements 303 is the same as the number of arc-shaped grooves 341. In this embodiment, each locking block is evenly distributed circumferentially. It should be noted that the entire knob assembly 300 is clamped between the propeller 200 and the hub head 400. The propeller 200 and the hub head 400 are clamped together by fixing screws 202. After assembly, the propeller 200, knob assembly 300, and hub head 400 are assembled as a whole, which can be easily removed from the drive shaft and installed.

[0044] Please see Figure 3 The drive shaft 101 has an annular groove 104. When each locking block rotates along with the rotating buckle plate, each locking block can retract towards or diverge within the annular groove 104, allowing the knob assembly to be locked or unlocked onto the drive shaft. Furthermore, when the rotating buckle plate 304 is rotated, the locking block 301, guided by the arc-shaped groove 341 of the rotating buckle plate 304, retracts towards the annular groove 104 along the radial direction of the central movable hole 321 of the baffle 302. At this time, the outer wedge-shaped surface of the locking block 301 abuts against the inner surface of the annular groove 104 of the drive shaft 101, generating a radial locking force. This locks the entire knob assembly 300 within the annular groove 104. During this process, the elastic element 303 is further stretched, providing additional locking preload, ensuring stable locking force even during high-speed rotation, reducing locking force fluctuations, and improving locking stability. When the buckle plate 304 is rotated in the opposite direction, the rotation of the baffle 302 causes the locking block 301 to be subjected to a centripetal force, that is, the locking block 301 moves outward and compresses the elastic force of the elastic element 303, moving away from the center of the annular groove 104 and disengaging from the buckle of the annular groove 104, thus achieving quick unlocking.

[0045] Specifically, during assembly, the drive shaft 101 can be directly passed through the propeller 200 and pressed against each locking block 301 of the knob assembly 300. Since the top of the drive shaft is conical, each locking block can be pushed open so that the locking blocks are spread outward away from the central axis of the annular groove 104. After each locking block 301 spreads out, the drive shaft 101 can pass into the area where the locking blocks 301 spread. Then, each locking block slides down along the top of the drive shaft and finally slides into the annular groove of the drive shaft. Under the action of the elastic element, each locking block retracts and clamps together, locking the locking block 301 in the annular groove 104 to achieve radial locking of the rotating assembly. When it is necessary to remove the propeller, i.e. to unlock it, the knob assembly's latch plate 304 is rotated. Under the action of the elastic element, the locking blocks are spread away from the central axis of the annular groove 104, thus "opening" the locked state of each locking block. When the opening diameter is greater than the diameter of the drive shaft 101, it can disengage from the annular groove 104 of the drive shaft 101, thereby achieving the unlocked state and allowing the entire propeller to be removed.

[0046] Thus, by incorporating a rotary latch plate, baffles, elastic elements, and several locking blocks, rapid assembly and disassembly can be achieved without the need for any tools, avoiding the problem of threaded connections becoming increasingly tight and difficult to disassemble over time. Furthermore, placing the knob assembly at the top of the propeller not only prevents accidental disassembly due to accidental contact or collision, but also eliminates structural limitations based on the number of blades, allowing for easy operation even with multiple blades. As the locking blocks rotate with the rotary latch plate, they can retract into the annular groove or move outwards, allowing the knob assembly's locking blocks to lock or unlock onto the annular groove of the drive shaft. This facilitates convenient and quick propeller disassembly, avoiding the problem of traditional threaded connections becoming increasingly tight over time. It balances ease of assembly and disassembly with preventing deformation or breakage over prolonged use, thus improving safety and extending service life.

[0047] It should be noted that each of the locking blocks and the annular groove are located on the same plane. This ensures that the locking blocks are in a horizontal position when they retract and open, avoiding misalignment between the annular groove and the locking blocks.

[0048] Please see Figure 4 and Figure 6 The buckle plate 304 has a plurality of travel holes 342. Each of the locking blocks 301 is provided with an operating column 305. Each operating column is respectively located in each of the travel holes. When the locking block rotates with the buckle plate, the operating column can move in the travel hole to control the locking block to retract into the annular groove or move outward.

[0049] Please seeFigure 6 The buckle plate 304 has a fixing through hole 343, which is connected to the arc-shaped groove;

[0050] Please see Figure 5 and Figure 7 The baffle 302 is provided with a vertical fixing block 322, which passes through the fixing through hole. One end of the elastic element is disposed on the side wall of the arc-shaped groove, and the other end of the elastic element is disposed on the vertical fixing block. In this embodiment, the elastic element is a spring, which is placed in the arc-shaped groove of the snap fastener plate 304, with one end fixed to the side of the arc-shaped groove and the other end fixed to the vertical fixing block 322 of the baffle 302. During the circumferential rotation of the snap fastener plate, the snap fastener plate 304 can rotate, so the side of the arc-shaped groove is the movable end, and the vertical fixing block on the baffle 302 is the fixed end.

[0051] It should be noted that the snap-fit ​​plate also has a first screw hole, the baffle has a second screw hole, and the propeller hub has a third screw hole. External fixing screws 202 pass through the first, second, and third screw holes for secure installation. Thus, by providing multiple screw holes, the snap-fit ​​plate, baffle, and propeller hub can be fixed in place, further improving reliability.

[0052] Please see Figure 3 The drive shaft 101 has a radial through hole 103, through which a pin passes. The drive shaft 101 of the motor extends from inside the motor 100 and is used to transmit the motor torque to the propeller 200. The drive shaft 101 of the motor has a radial through hole 103 for inserting the pin 102; at the same time, a 360° annular groove 104 is cut into the top of the drive shaft 101, the groove width of which is slightly larger than the thickness of the locking block 301, so that the locking block 301 can be embedded in the groove and will not wobble from side to side. The pin 102 passes through the radial through hole 103 on the drive shaft 101, with the protruding parts at the left and right ends being consistent, and the length of the pin needs to be slightly smaller than the inner diameter of the propeller body 203.

[0053] Please see Figure 2 and Figure 7The propeller 200 includes a propeller body 203, a bushing 201, and multiple blades 204. Each blade is mounted on the propeller body. The bushing is fitted onto the drive shaft, and the propeller body is fitted onto the bushing. A groove is provided on the propeller body, and a pin passes through the groove. In this embodiment, the bushing is a metal bushing with a clearance fit between it and the drive shaft to reduce friction and heat generation. The groove is a U-shaped groove, located at the bottom center of the propeller. During installation, the drive shaft passes through the metal bushing, ultimately embedding the pin on the drive shaft into the U-shaped groove. The bushing 201 has a knurled surface and is integrated with the propeller body 203, ensuring precise fit and alignment, and improving the overall wear resistance and durability of the propeller. The propeller body 203 has blades; in this embodiment, the number of blades can be multiple, depending on actual needs, and there is no limit to the number.

[0054] Please see Figure 7 and Figure 8 The propeller body 200 is also provided with a positioning hole 205, and the baffle 302 is provided with a positioning post 323, which passes through the positioning hole of the propeller body. Thus, by setting the positioning post 323 through the positioning hole, the propeller body 200 and the baffle can be fixed together, thereby fixing the knob assembly to the propeller body 200. The baffle 302 inserts the positioning post into the positioning hole at the top of the propeller, restricting its own circumferential rotation.

[0055] In this embodiment, the stroke hole is an oblong hole, and the direction of the oblong hole is set in the radial direction. The first screw hole is a micro-arc shape, which is offset from the arc groove to achieve different connections.

[0056] The locking block's shape matches the central movable hole. The central movable hole is the hollowed-out area in the middle of the baffle plate, resembling multiple fan-shaped holes evenly distributed around the circumference, and it cooperates with the shape of the locking block to achieve its movement. The baffle plate axially limits the locking block, preventing axial back-and-forth wobbling. The rotary buckle plate controls the locking and unlocking states of the locking block through stroke holes. The outer surface of the rotary buckle plate has knurling to increase contact force during rotation and provides an anti-slip effect.

[0057] When working, please refer to Figure 5 and Figure 9 , Figure 9(a) and (b) show the locked state (also the natural state) of the quick-release propeller. (a) has an additional screw-on plate 304 compared to (b). In the locked state, the spring force acts on the vertical fixing block of the baffle 302 and the arc-shaped groove side of the screw-on plate 304. Because the baffle 302 is restricted from circumferential rotation by the positioning pin, the spring force acts on the arc-shaped groove side (movable surface) of the screw-on plate 304 at the other end, pushing the screw-on plate 304 to rotate around the central circumference. Figure 9 (Clockwise) During the rotation, the travel hole on the buckle plate 304 will drive the operating column 305 to move. The movement of the operating column 305 causes the locking block 301 to move, that is, the locking block retracts and moves closer to the axis until the operating column 305 moves to one end of the travel hole ( Figure 9 (a) is the proximal end), until it can no longer move. At this point, the retracted locking block 301 just fits into the annular groove 104 of the drive shaft 101, as shown. Figure 9 As shown in (b), the propeller 200 is axially limited under the continuous elastic force of the spring. When the motor is working, the torque output through the drive shaft is transmitted to the propeller through the pin shaft, realizing the rotation of the propeller. The axial limit prevents the propeller from moving axially on the motor drive shaft, so that the propeller can rotate safely and efficiently.

[0058] Please see Figure 10 , Figure 10 (a) and (b) show the unlocked state of the quick-release propeller (after the snap-lock plate 304 has been rotated a certain angle). (a) has the additional snap-lock plate 304 compared to (b). In this state, when the propeller needs to be disassembled, the snap-lock plate 304 is manually rotated, and the stroke hole on the snap-lock plate 304 drives the control column 305 to move. Figure 10 (a) indicates movement away from the axis. The movement of the operating column 305 drives the locking block 301 to move away from the axis within the central movable hole of the baffle 302 until the operating column 305 stops at the edge furthest from the axis within the stroke hole. At this point, the locking block 301 has exited the annular groove 104 of the drive shaft 101. Figure 10 As shown in (b), when the axial limit fails, the knob assembly can be pulled out to disassemble the propeller. As long as the locking block 301 exits the annular groove 104, there is no need to output knob force, and the entire rotation stroke angle is not large.

[0059] The present invention also provides a water sports board, including the knob-type quick-release propeller device described above. Although the quick-release propeller mounting of the present invention is based on electric hydrofoil products, it is not limited to electric hydrofoil products. It can be extended to products equipped with propellers such as household electric fans, drone propellers, and underwater thrusters, solving the problem of threaded connections becoming tighter with use, leading to difficulties in disassembly.

[0060] The technical features of the above embodiments can be combined in any way. For the sake of brevity, 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.

[0061] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A knob type quick release propeller device, characterized by, The utility model provides a transmission shaft, propeller and knob assembly, the knob assembly is used for locking propeller on transmission shaft, the knob assembly includes screw plate body, baffle, elastic element and a plurality of lock block, the transmission shaft passes the center through -hole in screw plate body, the screw plate body is provided with arc -shaped recess, one end of elastic element is arranged on the side wall of arc -shaped recess, the other end of elastic element is arranged on baffle, baffle is provided with center movable hole, each lock block is movably arranged in center movable hole, the transmission shaft is provided with annular recess, when each lock block rotates with the rotation of screw plate body, each lock block can contract or diverge to annular recess, so that the knob assembly can be locked or unlocked on the transmission shaft, the screw plate body is provided with a plurality of stroke holes, each lock block is provided with operating column, each operating column is limited in each stroke hole, when the lock block rotates with the rotation of screw plate body, operating column can move in stroke hole, to control the lock block contract or diverge to annular recess, the screw plate body is provided with fixed through -hole, fixed through -hole is communicated with arc -shaped recess, the baffle is provided with vertical fixed block, vertical fixed block passes fixed through -hole, one end of elastic element is arranged on the side wall of arc -shaped recess, the other end of elastic element is arranged on vertical fixed block, each lock block is evenly distributed in circumference, still include propeller hub head, propeller hub head is installed on the knob assembly, the screw plate body is provided with first screw hole, baffle is provided with second screw hole, propeller hub head is provided with third screw hole, and after the fixed screw passes first screw hole, second screw hole, third screw hole, fixed setting is arranged outside, the transmission shaft is provided with radial through -hole, and the radial through -hole is provided with pin shaft, still include driving motor, driving motor is connected with transmission shaft, the propeller includes propeller body, shaft sleeve and a plurality of blades, each blade is installed on propeller body, the shaft sleeve is sleeved on the transmission shaft, the propeller body is sleeved on the shaft sleeve, the propeller body is provided with clamping groove, the pin shaft passes in clamping groove, the propeller body is still provided with positioning hole, the baffle is provided with positioning column, and the positioning column passes in the positioning hole of propeller body, including the knob formula quick release propeller device of any one of claims 1-6. ​ ​ ​ ​ ​ ​ 2. A knob release propeller device according to claim 1, wherein, ​ 3. A knob release propeller device according to claim 1, wherein, ​ ​ 4. A knob release propeller device according to claim 1, wherein, ​ 5. A knob release propeller assembly according to claim 4, wherein, ​ 6. A knob release propeller assembly according to claim 4, wherein: ​ ​ 7. A water ride board characterized by, ​

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