Knob type quick-release propeller device and water sports board

Abstract

The invention relates to the technical field of electric hydrofoil plates, and discloses a rotary knob type quick-release propeller device and a water sports board, the rotary knob type quick-release propeller device comprises a transmission shaft, a propeller and a rotary knob assembly, and the rotary knob assembly is used for locking the propeller on the transmission shaft; the rotary knob assembly comprises a rotary buckle plate body, a blocking piece, an elastic piece and a plurality of locking blocks, a center through hole is formed in the rotary buckle plate body, a transmission shaft penetrates through the center through hole, an arc-shaped groove is formed in the rotary buckle plate body, one end of the elastic piece is arranged on the side wall of the arc-shaped groove, the other end of the elastic piece is arranged on the blocking piece, and the locking blocks are arranged on the blocking piece. A center movable hole is formed in the blocking piece, and the locking blocks are movably contained in the center movable hole. According to the rotary knob type quick-release propeller device and the water sports plate, by arranging the rotary buckle plate body, the blocking piece, the elastic piece and the multiple locking blocks, quick assembly and disassembly can be achieved, no tool is needed in the whole process, and the problem that due to the fact that threaded connection is tighter and tighter, disassembly is difficult is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric hydrofoil boards, and particularly relates to a knob type quick-release propeller device and a water sports board. BACKGROUND

[0002] An electric surfboard, i.e., an electric hydrofoil board, has a complex structure and a large number of modules, which leads to the need for time-consuming and laborious assembly and disassembly before use and after use by means of tools. Once the tools are forgotten or lost, the assembly and disassembly cannot be performed, which greatly affects the user experience. Meanwhile, the existing propeller fixing methods on the market mostly adopt screw tightening fixation. When the motor starts to work, the screw connection will be tighter due to inertia, the screw connection will be tighter with longer use time, and the disassembly will be more difficult. In order to avoid or improve the above situation and reduce the number of tools to be carried and the assembly and disassembly time, the present application proposes a knob type quick-release propeller device for the propeller part. The device does not need any tools, and even after long time use, the assembly and disassembly can be easily and quickly performed. SUMMARY

[0003] The present application aims to provide a knob type quick-release propeller device and a water sports board to solve the problems in the background art.

[0004] The technical solution of the present application to solve the above technical problems is as follows: A knob type quick-release propeller device comprises a transmission shaft, a propeller and a knob assembly, the knob assembly is used for locking the propeller on the transmission shaft; The knob assembly comprises a rotating buckle plate body, a baffle, an elastic member and a plurality of locking blocks. The rotating buckle plate body is provided with a central through hole, and the transmission shaft is arranged in the central through hole. The rotating buckle plate body is provided with an arc-shaped groove. One end of the elastic member is arranged on the sidewall of the arc-shaped groove, and the other end of the elastic member is arranged on the baffle. The baffle is provided with a central movable hole, and each locking block is movably arranged in the central movable hole. The transmission shaft is provided with an annular groove. When each locking block rotates with the rotating buckle plate body, each locking block can be contracted or dispersed in the annular groove, so that the knob assembly can be locked or unlocked on the transmission shaft.

[0005] In one embodiment, each locking block and the annular groove are located in the same plane.

[0006] In one embodiment, the rotating buckle plate body is provided with a plurality of stroke holes, each of the lock blocks is respectively provided with an operating column, each of the operating columns is correspondingly positioned in each of the stroke holes, and when the lock blocks rotate following the rotating buckle plate body, the operating columns can move in the stroke holes to control the lock blocks to shrink into the annular groove or move outward.

[0007] In one embodiment, the rotating buckle plate body is provided with a fixed through hole, and the fixed through hole is communicated with the arc-shaped groove. The stop sheet is provided with a vertical fixed block, the vertical fixed block is arranged in the fixed through hole, one end of the elastic member is arranged on the side wall of the arc-shaped groove, and the other end of the elastic member is arranged on the vertical fixed block.

[0008] In one embodiment, the lock blocks are uniformly distributed in a circle.

[0009] In one embodiment, a hub head is further included, and the hub head is installed on the rotating knob assembly. The rotating buckle plate body is further provided with a first screw hole, the stop sheet is provided with a second screw hole, the hub head is provided with a third screw hole, and an external fixing screw is arranged in the first screw hole, the second screw hole and the third screw hole.

[0010] In one embodiment, the transmission shaft is provided with a radial through hole, and a pin shaft is arranged in the radial through hole.

[0011] In one embodiment, a driving motor is further included, and the driving motor is connected with the transmission shaft.

[0012] In one embodiment, the propeller includes a propeller body, a shaft sleeve and a plurality of blades, each of the blades is installed on the 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 a clamping groove, and the pin shaft is arranged in the clamping groove. The propeller body is further provided with a positioning hole, and the stop sheet is provided with a positioning column, and the positioning column is arranged in the positioning hole of the propeller body.

[0013] The application further provides a water sports board including the rotating knob type quick-release propeller device.

[0014] Compared with the prior art, the application has at least the following advantages: 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.

[0015] 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.

[0016] 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

[0017] Figure 1 This is a schematic diagram of a knob-type quick-release propeller device according to one embodiment; Figure 2 for Figure 1 An exploded view of the knob-type quick-release propeller assembly shown. Figure 3 for Figure 1 A schematic diagram of the drive shaft of a knob-type quick-release propeller device is shown. Figure 4 for Figure 1 A schematic diagram of the locking block of a knob-type quick-release propeller device is shown. Figure 5 A schematic diagram of a knob-type quick-release propeller device according to another embodiment; Figure 6 for Figure 1 A schematic diagram of the screw fastener plate of a knob-type quick-release propeller device is shown. Figure 7 for Figure 1 A schematic diagram of the structure of a knob-type quick-release propeller device is shown. Figure 8 for Figure 1Structure diagram of the baffle of the knob quick-release propeller device; Figure 9 Figures (a) and (b) are schematic diagrams of the locked state of the knob quick-release propeller device; Figure 10 Figures (a) and (b) are schematic diagrams of the unlocked state of the knob quick-release propeller device. DETAILED DESCRIPTION

[0018] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The technical solutions of the present application will be further described below in combination with the drawings of the embodiments of the present application. The present application is not limited to the following specific embodiments.

[0019] It should be understood that the same or similar reference numerals in the drawings of the embodiments correspond to the same or similar components. In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "upper", "lower", "front", "back", "left", "right", "top" and "bottom" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore the terms describing the positional relationship in the drawings are only used for exemplary illustration, and cannot be understood as a limitation on the present patent, and for those skilled in the art, the specific meanings of the above terms can be understood according to the specific circumstances.

[0020] The propeller is fixed on the motor transmission shaft, which rotates around the shaft by the motor driving the transmission shaft. From the perspective of mechanics, two points need to be ensured for the propeller to achieve efficient and safe rotation: first, to bear the torque, and second, to be axially limited.

[0021] At present, the propeller installation methods on the market are only fixed type and quick-release type.

[0022] Among them, the fixed propeller installation method needs to fix the propeller on the motor transmission shaft with the help of tools. The structure is usually to open a small radial hole on the motor shaft, insert a metal pin shaft in the hole, and reserve a "U" shaped slot in the middle of the bottom of the propeller, so that the propeller needs to be placed in the "U" shaped slot when installed. The radial metal pin shaft on the motor transmission shaft and the "U" shaped slot at the bottom of the propeller realize the function of bearing torque. However, axial positioning needs to be fixed by structure, which is usually fixed and limited by screws (threaded hole on the top of the motor transmission shaft) or nuts (outer thread cut on the top of the motor transmission shaft; the fixed nuts are regular standard nuts, bullet head tapered head, or other shapes, but the core is still internal thread). This method needs to pay attention to strictly control the axial length of the propeller. When the propeller is fixed by screws / nuts, the surface of the metal pin shaft just touches the bottom of the "U" shaped slot at the bottom of the propeller, thus achieving axial positioning.

[0023] Secondly, the quick release propeller installation method. The common quick release device on the market is usually set on the "axial positioning". This scheme retains the pin shaft structure of the fixed type, continues to transmit torque through the pin shaft, and achieves axial positioning by cutting a circular slot on the top of the transmission shaft and using the spring and sliding buckle form. (In the natural state, the sliding buckle is embedded in the transmission shaft slot under the action of the spring force, achieving axial positioning; when disassembling, press the sliding buckle, and the buckle will be separated from the slot, which can be easily removed.) Another quick release device realizes the functions of bearing torque and axial positioning. This scheme also uses the sliding buckle with spring form. Compared with the former, the latter cleverly designs a protruding cylindrical structure on the sliding buckle structure, which replaces the pin shaft to bear torque (in the natural state, the protruding cylinder is inserted into the radial hole of the transmission shaft; when the sliding buckle is pressed, the protruding cylinder can exit the radial hole of the transmission shaft).

[0024] Compared with the fixed type, the obvious advantage of the quick release device is that it is easy and convenient to assemble and disassemble without the need for any tools, and there is no need to worry about the problem of difficult disassembly caused by the tightening of the threaded connection. However, the fixed device structure is simple (low cost) and the connection is more firm and reliable. However, the quick release device also has many shortcomings. The sliding buckle of the former device is only axially limited. When the sliding buckle is set at the bottom of the propeller, it is easy to be limited by the number of blades. When the number of blades is greater than 2, the pressing space is insufficient, and it is difficult to operate. When the sliding buckle is placed at the top of the propeller, it is easy to be accidentally opened due to collision, which has safety hazards. The sliding buckle of the latter device bears torque and axial force, which leads to the deformation and even fracture of the sliding buckle during use, resulting in short fatigue life.

[0025] Based on the above problems, the application provides a knob type quick-release propeller device, which places a knob assembly on the top of a propeller, avoids the problems of accidental opening or collision, avoids the influence of the number of blades, and avoids the problems of difficult disassembly and tight thread connection after long-term use.

[0026] Please refer to Figures 1-10 A knob type quick-release propeller device, comprising a transmission shaft 101, a propeller 200 and a knob assembly 300, the knob assembly 300 is used for locking the propeller 200 on the transmission shaft 101; the knob type quick-release propeller device further comprises a driving motor 100 and a hub head 400, the hub head is installed on the knob assembly, and the driving motor is connected with the transmission shaft. It should be noted that the transmission shaft 101 is used for installing the propeller 200, the knob assembly 300 and the hub head 400; the propeller 200 can be installed with multiple blades, at least three, or even more, and is not limited by the structure; the knob assembly 300 can be locked in the annular groove 104 of the transmission shaft 101, so that the position of the propeller 200 can be locked; and the driving motor is used for driving the transmission shaft to rotate, thereby driving the propeller 200 and the knob assembly 300 to rotate.

[0027] Please refer to Figure 2 、 Figure 5 and Figure 6The knob assembly 300 comprises a rotating buckle plate body 304, an elastic member 303, a blocking piece 302 and a plurality of locking blocks 301. The rotating buckle plate body is provided with a central through hole, and the transmission shaft is arranged in the central through hole. The rotating buckle plate body 304 is provided with an arc-shaped groove 341. One end of the elastic member is arranged on the sidewall of the arc-shaped groove, and the other end of the elastic member is arranged on the blocking piece. The blocking piece is provided with a central movable hole 321, and each locking block is movably arranged in the central movable hole 321. It should be noted that the rotating buckle plate body 304 is used for fixing the elastic member 303 and connecting the blocking piece 302. The elastic member 303 is used for connecting the rotating buckle plate body and the blocking piece, and provides a rebound force for the rotation of the blocking piece. The blocking piece 302 is used for mounting the knob assembly 300 on the propeller 200, and provides the central movable hole 321 for the locking block 301, so that the locking block is limited in the central movable hole 321 during the locking and unlocking operations. Specifically, the arc-shaped groove 341 is annularly provided with a plurality of arc-shaped grooves, and the number of the elastic members 303 is the same as that of the arc-shaped grooves 341. In this embodiment, the locking blocks are uniformly distributed in the circumferential direction. It should be noted that the whole knob assembly 300 is clamped in the middle by the propeller 200 and the hub head 400. The propeller 200 and the hub head 400 are clamped by tightening the fixing screw 202. The propeller 200, the knob assembly 300 and the hub head 400 are assembled as a whole, which can be conveniently taken off and installed on the transmission shaft.

[0028] Please refer to Figure 3 The transmission shaft 101 is provided with an annular groove 104. When each locking block rotates with the rotating buckle plate body, each locking block can be contracted or dispersed in the annular groove 104, so that the knob assembly can be locked or unlocked on the transmission shaft. Further, when the rotating buckle plate body 304 is rotated, the locking block 301 is contracted in the annular groove 104 in the radial direction of the central movable hole 321 of the blocking piece 302 under the guidance of the arc-shaped groove 341 of the rotating buckle plate body 304. At this time, the outer wedge surface of the locking block 301 and the inner side surface of the annular groove 104 of the transmission shaft 101 abut each other, and a radial locking force is generated to lock the whole knob assembly 300 in the annular groove 104. The elastic member 303 is further stretched in this process, and additional locking pre-tightening force is provided to make the system maintain stable locking force at high speed, reduce the fluctuation range of the locking force and improve the locking stability. When the rotating buckle plate body 304 is reversely rotated, the rotation of the blocking piece 302 causes the locking block 301 to be subjected to a centripetal force, i.e. the locking block 301 is dispersed outward, the elastic force of the elastic member 303 is compressed, and the locking block 301 is moved away from the center of the annular groove 104 to be separated from the buckle of the annular groove 104, so as to realize quick unlocking.

[0029] Specifically, when assembling, the transmission shaft 101 can be directly inserted through the propeller 200 and then abut against the locking blocks 301 of the knob assembly 300. Since the top of the transmission shaft is conical, the locking blocks can be spread out in a direction away from the central axis of the annular groove 104. After the locking blocks 301 are spread out, the transmission shaft 101 can be inserted into the spread area of the locking blocks 301. Then the locking blocks slide down along the top end of the transmission shaft and finally slide into the annular groove of the transmission shaft. Under the action of the elastic member, the locking blocks are shrunk and clamped together. The locking blocks 301 are locked in the annular groove 104 to achieve the locking of the rotating assembly in the radial direction. When the propeller needs to be removed, i.e., when unlocking, the rotating clasp plate body 304 of the knob assembly is rotated, and then under the action of the elastic member, the locking blocks are spread out in a direction away from the central axis of the annular groove 104, so that the locking state of the locking blocks is "opened". When the opening diameter is greater than the diameter of the transmission shaft 101, the locking blocks can be separated from the annular groove 104 of the transmission shaft 101, thereby achieving the unlocking state, and the entire propeller can be removed.

[0030] In this way, by arranging the rotating clasp plate body, the blocking piece, the elastic member, and the plurality of locking blocks, quick assembly and disassembly can be achieved, and no tools are needed in the entire process, thereby avoiding the problem that the threaded connection becomes tighter and tighter, making disassembly difficult. Moreover, the knob assembly is arranged at the top of the propeller, which can avoid accidental touch or collision and accidental falling, and the structure is not limited by the number of blades, and the knob assembly can be easily operated in the case of multiple blades. When the locking blocks rotate with the rotating clasp plate body, the locking blocks can be shrunk and closed or spread out and moved outward into the annular groove, so that the locking blocks of the knob assembly can be locked or unlocked on the annular groove of the transmission shaft, thereby making it convenient and fast to disassemble the propeller, avoiding the problem that the threaded connection becomes tighter and tighter, and balancing the convenience of assembly and disassembly, avoiding deformation or fracture after long-term use, and improving safety and prolonging service life.

[0031] It should be noted that the locking blocks and the annular groove are located on the same plane. In this way, the locking blocks can be guaranteed to be in a horizontal position when being shrunk and closed or spread out and opened, avoiding the case that the annular groove and the locking blocks are not aligned.

[0032] Please refer to Figure 4 and Figure 6 , a plurality of stroke holes 342 are arranged on the rotating clasp plate body 304, and each locking block 301 is respectively provided with an operating column 305. Each operating column is correspondingly arranged in each stroke hole. When the locking blocks rotate with the rotating clasp plate body, the operating columns can move in the stroke holes to control the locking blocks to be shrunk and closed or spread out and moved outward into the annular groove.

[0033] Please refer toFigure 6 The fixing through hole 343 is communicated with the arc-shaped groove; Please refer to Figure 5 and Figure 7 The vertical fixing block 322 is arranged on the baffle 302, the vertical fixing block is penetrated in the fixing through hole, one end of the elastic member is arranged on the side wall of the arc-shaped groove, and the other end of the elastic member is arranged on the vertical fixing block. In the embodiment, the elastic member is a spring, the spring is arranged in the arc-shaped groove of the rotating buckle plate body 304, one end of the spring is fixed on the side wall of the arc-shaped groove, and the other end of the spring is fixed on the vertical fixing block 322 of the baffle 302. In the rotating process of the rotating buckle plate body, the rotating buckle plate body 304 can rotate, therefore the side wall of the arc-shaped groove is a movable end, and the vertical fixing block on the baffle 302 is a fixed end.

[0034] It should be noted that the rotating buckle plate body is further provided with a first screw hole, the baffle is provided with a second screw hole, and the hub head is provided with a third screw hole, and the external fixing screw 202 is penetrated in the first screw hole, the second screw hole and the third screw hole and is fixed. In this way, by arranging a plurality of screw holes, the rotating buckle plate body, the baffle and the hub head can be fixed, and the reliability is further improved.

[0035] Please refer to Figure 3 The radial through hole 103 is arranged on the transmission shaft 101, and the pin shaft is penetrated in the radial through hole. The transmission shaft 101 of the motor is led out from the inside of the motor 100, and is used for transmitting the motor torque to the 200 propeller. The radial through hole 103 is arranged on the transmission shaft 101 of the motor, and is used for inserting the pin shaft 102; meanwhile, a circumferential groove 104 of 360° is cut out at the top of the transmission shaft 101, the groove width is slightly larger than the thickness of the lock block 301, the lock block 301 can be embedded in the groove and cannot shake left and right. The pin shaft 102 is penetrated through the radial through hole 103 on the transmission shaft 101, the left and right end protruding parts are consistent, and the length of the pin shaft needs to be slightly smaller than the inner wall diameter of the propeller body 203.

[0036] Please refer to Figure 2 and Figure 7The propeller 200 includes a propeller body 203, a shaft sleeve 201, and a plurality of blades 204, each of which is mounted on the propeller body. The shaft sleeve is sleeved on the transmission shaft, and the propeller body is sleeved on the shaft sleeve. The propeller body is provided with a clamping groove, and the pin shaft is arranged in the clamping groove. In this embodiment, the shaft sleeve is a metal shaft sleeve, and the metal shaft sleeve is in clearance fit with the transmission shaft to reduce friction heat. The clamping groove is a U-shaped clamping groove, and a U-shaped clamping groove is arranged at the bottom of the propeller. When the propeller is installed, the transmission shaft passes through the metal shaft sleeve of the propeller, and finally the pin shaft on the transmission shaft is embedded in the U-shaped clamping groove. The surface of the shaft sleeve 201 is knurled, and the shaft sleeve 201 is connected with the propeller body 203 in an integrated structure, which can ensure accurate fit and centering, and improve the wear resistance and durability of the propeller as a whole. The propeller body 203 is provided with blades. In this embodiment, the number of blades can be set to be multiple, and the number is not limited according to actual needs.

[0037] Please refer to Figure 7 and Figure 8 , the propeller body 200 is further provided with a positioning hole 205, and the baffle 302 is provided with a positioning column 323, which is arranged in the positioning hole of the propeller body. In this way, by arranging the positioning column 323 in the positioning hole, the propeller body 200 and the baffle can be fixed, so that the knob assembly can be fixed on the propeller body 200. The baffle 302 inserts the positioning column into the positioning hole at the top of the propeller, and limits the circumferential rotation of the baffle.

[0038] In this embodiment, the stroke hole is a waist-shaped hole, and the direction of the waist-shaped hole is arranged along the radial direction. The first screw hole is a micro-arc shape, which is arranged in a staggered manner with the circular arc groove to realize different connections.

[0039] The lock block is matched with the shape of the center movable hole. The center movable hole is a hollow area in the middle of the baffle, which is similar to a plurality of fan-shaped holes uniformly distributed around the circumference, and cooperates with the shape of the lock block to realize the movement of the lock block. The baffle axially limits the lock block to avoid axial shaking. The rotation buckle plate body controls the locking and loosening state of the lock block by arranging the stroke hole. The outer surface of the rotation buckle plate body has knurling to increase the contact force during rotation and has an anti-skid effect.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] Any combination of the technical features in the above-described embodiments can be made, and for the sake of brevity, not all possible combinations are described, however, as long as the combination of the technical features does not exist in contradiction, it shall be considered within the scope of the present disclosure.

[0044] The above-described embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it shall not be understood as a limitation on the patent scope of the present application. It shall be pointed out that, for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present application, and these shall be within the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. A knob-type quick-release propeller device, characterized in that, include: A drive shaft, a propeller, and a knob assembly, wherein 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 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. 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.

2. The knob-type quick-release propeller device according to claim 1, characterized in that, Each of the locking blocks and the annular groove are located on the same plane.

3. The knob-type quick-release propeller device according to claim 1, characterized in that, The buckle plate has several travel holes, and each lock block has an operating column. Each operating column is respectively located in each travel hole. When the lock block rotates with the buckle plate, the operating column can move in the travel hole to control the lock block to retract or diverge into the annular groove.

4. A knob-type quick-release propeller device according to claim 3, characterized in that, The buckle plate has a fixing through hole, which communicates with the arc-shaped groove. 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.

5. A knob-type quick-release propeller device according to claim 3, characterized in that, Each of the aforementioned locking blocks is evenly distributed around the circumference.

6. A knob-type quick-release propeller device according to claim 1, characterized in that, It also includes a propeller hub head, which is mounted on the knob assembly; 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.

7. A knob-type quick-release propeller device according to claim 1, characterized in that, The drive shaft has a radial through hole, and a pin passes through the radial through hole.

8. A knob-type quick-release propeller device according to claim 7, characterized in that, It also includes a drive motor, which is connected to the transmission shaft.

9. A knob-type quick-release propeller device according to claim 7, characterized in that, The propeller includes a propeller body, a bushing, and multiple blades. Each blade is mounted on the propeller body. The bushing is fitted onto the drive shaft. The propeller body is fitted onto the bushing. A slot is provided on the propeller body, and the pin passes through the slot. 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.

10. A water sports board, characterized in that, Includes the rotary quick-release propeller device as described in any one of claims 1-9.

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