A propeller arrangement and a rotorcraft

Abstract

The embodiment of the present application relates to the technical field of rotary-wing aircraft, and discloses a propeller device, which comprises a propeller, a propeller base, a first limiting piece, a second limiting piece and a locking assembly, the propeller comprises a propeller blade and a propeller support, the propeller blade is fixed to one end of the propeller support, the other end of the propeller support is provided with a limiting shaft, the limiting shaft is provided with a limiting part, the limiting shaft is pivotally connected with the propeller base, the first limiting piece and the second limiting piece are detachably arranged on the propeller base, the first limiting piece is provided with a limiting hole, the limiting part is inserted into the limiting hole, and the limiting part and the limiting hole jointly limit the rotation angle of the propeller relative to the propeller base, so that the pitch can be quickly adjusted, the second limiting piece is clamped on the limiting shaft and limits the propeller support from being separated from the propeller base along the axial direction of the limiting shaft, and the locking assembly is detachably arranged on the propeller base and is used for fixing the first limiting piece and the second limiting piece on the propeller base, through the above mode, the embodiment of the present application can quickly adjust the pitch of the propeller and does not need to use a hollow shaft motor, and the cost is lower.

Description

Technical Field

[0001] This invention relates to the field of rotorcraft technology, and particularly to a propeller device and a rotorcraft. Background Technology

[0002] Rotary-wing aircraft, as core equipment for the high-altitude economy, are widely used in fields such as plant protection, hoisting, rescue, and logistics. In actual use, it is often necessary to replace the propellers according to the scenario to adjust flight efficiency or load capacity, or to replace them urgently when the propellers are damaged; at the same time, some scenarios require adjusting the propeller pitch to adapt to different flight requirements.

[0003] In the process of realizing this invention, the inventors discovered that in the prior art, the pitch adjustment of rotorcraft relies on an automatic pitch-changing mechanism. The automatic pitch-changing mechanism adjusts the angle of the propeller, thereby adjusting the pitch of the propeller. However, the automatic pitch-changing mechanism requires a hollow shaft motor, which is costly. Summary of the Invention

[0004] The main technical problem solved by the embodiments of the present invention is to provide a propeller device that can adjust the pitch of the propeller without the need for a hollow shaft motor, thus reducing costs.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a propeller device, including a propeller, a propeller base, a first limiting member, a second limiting member, and a locking assembly. The propeller includes blades and a propeller support. The blades are fixed to one end of the propeller support, and a limiting shaft is provided at the other end of the propeller support. The limiting shaft is provided with a limiting part. The propeller base is pivotally connected to the limiting shaft. The first limiting member is detachably disposed on the propeller base and has a limiting hole. The limiting part is inserted into the limiting hole, and the limiting part and the limiting hole cooperate to limit the rotation angle of the propeller relative to the propeller base. The second limiting member is detachably disposed on the propeller base and is engaged with the limiting shaft. The second limiting member restricts the propeller support from disengaging from the propeller base along the axial direction of the limiting shaft. The locking assembly is detachably disposed on the propeller base and is used to fix the first and second limiting members to the propeller base.

[0006] Optionally, the propeller base is provided with a first groove, a first limiting member is accommodated in the first groove, the inner wall of the first groove is attached to the outer wall of the first limiting member and restricts the rotation of the first limiting member relative to the propeller base, and the limiting part is inserted into the first groove.

[0007] Optionally, the propeller base is further provided with a second groove, a first through hole, and a second through hole. The first through hole connects the second groove to the outside, and the second through hole connects the first groove and the second groove. The limiting shaft is inserted into the second groove through the first through hole, and the limiting part is inserted into the first groove through the second through hole. The side wall of the limiting shaft is provided with a limiting groove. The second limiting member includes a top plate and a first extension extending from the top plate. When the second limiting member is installed on the propeller base, the top plate covers the first limiting member, and the first extension simultaneously extends into the second groove and is inserted into the limiting groove. The locking component covers the top plate to fix the second limiting member to the propeller base.

[0008] Optionally, the first limiting member is provided with a movable groove, and the second limiting member is provided with a second extension. When the second limiting member is installed on the paddle base, the second extension extends into the movable groove and restricts the axial movement of the first limiting member along the limiting shaft.

[0009] Optionally, the locking assembly includes a spring clip, which includes two clamping portions and a connection. The two clamping parts are fixed to the connecting part, and the clamping parts are provided with protrusions; the two opposite sides of the propeller base are provided with snap-fit ​​grooves, and the protrusion of one clamping part is engaged with a snap-fit ​​groove so that the spring clip is engaged with the propeller base. The connecting part covers the opening of the first groove and the second groove, and the connecting part abuts against the second limiting member to fix the second limiting member to the propeller base.

[0010] Optionally, the locking assembly also includes two triggers, each trigger comprising a connecting arm and two fixed arms. The two fixed arms are fixed to both ends of the connecting arm, and the two fixed arms of one trigger are respectively fixed to both sides of a clamping portion. The connecting arm protrudes from the connecting portion, and the connecting arms of the two triggers are arranged opposite to each other.

[0011] Optionally, both ends of the clamping part are provided with connecting holes, and the two fixed arms of a trigger are respectively inserted into the two connecting holes of the clamping part.

[0012] Optionally, the propeller support is provided with a mounting groove, a third through hole and a fourth through hole, the third through hole and the fourth through hole are respectively connected to the mounting groove, and the third through hole and the fourth through hole are respectively located on the two side walls of the mounting groove; the propeller also includes a propeller pin and a screw, the propeller pin passes through the third through hole and the propeller blade, and the screw passes through the fourth through hole and is screwed to the propeller pin, and the propeller support clamps and fixes the propeller blade on both sides of the mounting groove.

[0013] Optionally, the propeller support is provided with receiving grooves on both side walls of the mounting slot; the propeller also includes two gaskets, one gasket is received in the receiving groove on one side wall of the mounting slot, and the gasket at least partially protrudes from the receiving groove, the gasket is placed between the side wall of the mounting slot and the propeller blade, the propeller pin passes through one gasket, and the screw passes through the other gasket.

[0014] To solve the above-mentioned technical problems, another technical solution adopted by the present invention is to provide a rotorcraft, including a drive motor and a propeller device as described above, wherein the propeller base of the propeller device is mounted on the output end of the drive motor.

[0015] The beneficial effects of this invention are as follows: Unlike existing technologies, in this invention, the propeller device includes a propeller, a base, a first limiting member, a second limiting member, and a locking assembly. The propeller includes blades and a support. The blades are fixed to one end of the support, and the other end of the support is provided with a limiting shaft. The limiting shaft has a limiting portion and is pivotally connected to the base. Both the first and second limiting members are separably disposed on the base. The first limiting member has a limiting hole, and the limiting portion is inserted into the limiting hole. When the first limiting member is disposed on the base, the limiting portion is inserted into the limiting hole, and the limiting portion and the limiting hole work together to limit the rotation angle of the propeller relative to the base. When the second limiting member is disposed on the base, the second limiting member is engaged with the limiting shaft and limits... The propeller bracket detaches from the propeller base along the axial direction of the limiting shaft. The locking assembly is detachably mounted on the propeller base. When the locking assembly is fixed to the propeller base, it restricts the first and second limiting members to the propeller base. When it is necessary to adjust the propeller pitch, first remove the locking assembly, then remove the second and first limiting members, and separate the propeller from the propeller base. Then replace the first limiting member with one of different limiting hole angles, and reinstall the replaced first limiting member back into the propeller base. Then insert the propeller into the propeller base. At this time, the limiting part of the propeller is inserted into the limiting hole of the new first limiting member. The angle of the propeller is adjusted, thereby adjusting the propeller pitch. Finally, the second limiting member and the locking assembly are reinstalled. This eliminates the need for a hollow shaft motor, resulting in lower costs. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the drawings without creative effort.

[0017] Figure 1 This is a perspective view of the propeller device according to an embodiment of the present invention; Figure 2 yes Figure 1 Enlarged view of section A; Figure 3 This is an exploded view of the propeller device according to an embodiment of the present invention; Figure 4 yes Figure 3 Enlarged view of section B; Figure 5 This is a perspective view of the paddle base according to an embodiment of the present invention. Detailed Implementation

[0018] To facilitate understanding of the present invention, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is described as being "fixed to" another element, it can be directly on the other element, or one or more intermediate elements may exist between them. When an element is described as being "connected to" another element, it can be directly connected to the other element, or one or more intermediate elements may exist between them. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this specification are for illustrative purposes only.

[0019] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0020] Please see Figures 1-4 The propeller assembly includes a propeller 1, a propeller base 2, a first limiting member 3, a second limiting member 4, and a locking assembly 5. The propeller 1 is provided with a limiting shaft 121, and the limiting shaft 121 is provided with a limiting part 1211. The limiting shaft 121 is inserted into the propeller base 2 and is pivotally connected to the propeller base 2. The propeller 1 rotates relative to the propeller base 2 about the axis of the limiting shaft 121. The first limiting member 3 is detachably disposed on the propeller base 2 and is provided with a limiting hole 31. When the propeller 1 is assembled onto the propeller base 2, the limiting part 1211 is inserted into the limiting hole 31. 1211 and the limiting hole 31 work together to limit the rotation angle of the propeller 1 relative to the propeller base 2. The second limiting member 4 can be detachably disposed on the propeller base 2. When the second limiting member 4 is disposed on the propeller base 2, the second limiting member 4 is engaged with the limiting shaft 121. The second limiting member 4 restricts the propeller support 12 from disengaging from the propeller base 2 along the axial direction of the limiting shaft 121. The locking component 5 can be detachably disposed on the propeller base 2. When the locking component 5 is fixed to the propeller base 2, the locking component 5 abuts against the first limiting member 3 and the second limiting member 4, thereby fixing the first limiting member 3 and the second limiting member 4 to the propeller base 2 to complete the assembly.

[0021] When the angle of propeller 1 needs to be adjusted, first disassemble the locking assembly 5, remove the first limiting piece 3 and the second limiting piece 4 respectively, then pull propeller 1 out of the propeller base 2, then replace the first limiting piece 3 with the one matching the required angle of propeller 1, then reinstall the matching first limiting piece 3 into the propeller base 2, and then insert propeller 1 into the propeller base 2. At this time, propeller 1 will also insert into the first limiting piece 3. Then reinstall the second limiting piece 4, which is engaged with propeller 1. Finally, reinstall the locking assembly 5 to achieve the angle adjustment of propeller 1. In short, when it is necessary to change the rotation angle range of propeller 1 to adjust the pitch, simply disassemble and reassemble the first limiting piece 3, or replace the first limiting piece 3 with one having a different angle limiting hole 31, to quickly adjust the rotation angle of propeller 1, thereby achieving flexible pitch adjustment, greatly improving debugging efficiency, and suitable for power requirements in different flight scenarios.

[0022] Regarding the aforementioned propeller base 2, refer to... Figure 5 The propeller base 2 is provided with a first groove 21, and a first limiting member 3 is accommodated in the first groove 21. The inner wall of the first groove 21 fits against the outer wall of the first limiting member 3 and restricts the rotation of the first limiting member 3 relative to the propeller base 2. Therefore, when the limiting part 1211 is inserted into the first groove 21 and cooperates with the limiting hole 31, the first limiting member 3 can restrict the propeller 1 from rotating relative to the propeller base 2. In some embodiments, the limiting part 1211 is rectangular, and the shape of the first groove 21 is also rectangular. Of course, the limiting part 1211 and the first groove 21 are not limited to the above-described structure, and can also be other structures, such as polygonal structures.

[0023] In some embodiments, the propeller base 2 is further provided with a second groove 22, a first through hole 23 and a second through hole 24. The second groove 22 is provided on the propeller base 2, the first through hole 23 connects the second groove 22 to the outside, and the second through hole 24 connects the first groove 21 and the second groove 22. Specifically, during assembly, the limiting shaft 121 is inserted into the second groove 22 through the first through hole 23, and the limiting part 1211 enters the second groove 22 together with the limiting shaft 121. Then, it is inserted into the first groove 21 through the second through hole 24 and engages with the limiting hole 31 of the first limiting member 3 pre-installed in the first groove 21, thereby completing the limiting assembly of the propeller 1 and the first limiting member 3. The second groove 22 is used to install the second limiting member 4.

[0024] Please review the above-mentioned second limiting element 4. Figure 3The second limiting member 4 includes a top plate 41 and a first extension 42 extending from the top plate 41. The top plate 41 is a flat structure that can completely cover the openings of the first groove 21 and the second groove 22. The first extension 42 is a long strip-shaped protrusion that extends vertically from the lower surface of the top plate 41. The side wall of the limiting shaft 121 is provided with a limiting groove 1212. When the second limiting member 4 is installed on the paddle base 2, the top plate 41 covers the top of the first limiting member 3. At the same time, the first extension 42 passes through the opening of the first groove 21, extends into the second groove 22, and is inserted into the limiting groove 1212 of the limiting shaft 121 to prevent the paddle support 12 from detaching from the paddle base 2 along the axial direction of the limiting shaft 121. The top plate 41 abuts against the first limiting member 3. The locking component 5 is covered on the top plate 41 to firmly press and fix the second limiting member 4 to the paddle base 2. The second limiting member 4 firmly presses the first limiting member 3. In some embodiments, the end of the first extension 42 away from the top plate 41 is provided with a concave structure. When the first extension 42 is engaged with the limiting groove 1212, the limiting shaft 121 is also engaged with the concave structure, increasing the area of ​​the first extension 42 engaged with the limiting groove 1212, thereby improving the limiting effect on the propeller 1.

[0025] The first limiting member 3 is provided with a movable groove 32, which is opened on the upper surface of the first limiting member 3. The second limiting member 4 is provided with a second extension 43, which extends vertically from the lower surface of the top plate 41 and is located inside the first extension 42, corresponding to the position of the movable groove 32. When the second limiting member 4 is installed on the paddle base 2, the second extension 43 extends into the movable groove 32 and restricts the first limiting member 3 from moving axially along the limiting shaft 121.

[0026] Regarding the aforementioned locking component 5, the locking component 5 includes a spring clip 51, the spring clip 51 The assembly includes two clamping parts 511 and a connecting part 512. The two clamping parts 511 are fixed to the two ends of the connecting part 512. Each clamping part 511 has a protrusion 5111. The propeller base 2 has a snap-fit ​​groove 25 on both sides. The protrusion 5111 of one clamping part 511 is engaged in a snap-fit ​​groove 25 so that the entire spring clip snap-fit ​​51 is snapped and fixed to the propeller base 2. Specifically, during assembly, the spring clip snap-fit ​​51 is aligned with the slots of the first groove 21 and the second groove 22 of the propeller base 2. The spring clip snap-fit ​​51 is pressed down, causing the two clamping parts 511 to undergo elastic deformation. The protrusion 5111 gradually snaps into the corresponding snap-fit ​​groove 25. When the protrusion 5111 is fully engaged in the snap-fit ​​groove 25, the two clamping parts 511 return to their elastic deformation, and the protrusion 5111 fits tightly with the snap-fit ​​groove 25, thereby snapping and fixing the entire spring clip snap-fit ​​51 to the propeller base 2. At this time, the connecting part 512 covers the openings of the first groove 21 and the second groove 22. Simultaneously, the lower surface of the connecting part 512 abuts against the top plate 41 of the second limiting member 4, firmly pressing and fixing the second limiting member 4 to the paddle base 2, ensuring that the second limiting member 4 will not loosen. During disassembly, simply squeeze the two clamping parts 511 together to cause them to elastically deform, and the protrusion 5111 will disengage from the buckle groove 25, allowing the spring clip buckle 51 to be easily removed. The entire disassembly and assembly process requires no tools, making the operation convenient and efficient.

[0027] To facilitate the operator in applying force to disassemble the spring clip 51, the locking assembly 5 also includes two triggers 52. Each trigger 52 includes a connecting arm 521 and two fixing arms 522. The two fixing arms 522 are symmetrically fixed at both ends of the connecting arm 521 to form a U-shaped structure. The two fixing arms 522 of the trigger 52 are respectively fixed on both sides of a clamping part 511.

[0028] Furthermore, both ends of the clamping part 511 are provided with connecting holes 5112. The two fixing arms 522 of one trigger 52 are respectively inserted into the two connecting holes 5112 of one clamping part 511, thereby fixing the trigger 52 to the clamping part 511. When the spring clip 51 is installed, the connecting arms 521 of the two triggers 52 protrude above the connecting part 512, and the two connecting arms 521 are arranged opposite each other. The protruding connecting arms 521 are convenient for the user to hold. When disassembly is required, the operator can easily press the two connecting arms 521 towards each other, and the connecting arms 521 drive the two fixing arms 522 to lift up, thereby driving the two clamping parts 511 to move towards each other, causing the clamping parts 511 to undergo elastic deformation, and the protrusions 5111 disengage from the clip grooves 25, thereby quickly removing the spring clip 51.

[0029] It is worth noting that propellers 1 are usually arranged in pairs. Therefore, there are two second grooves 22, two first through holes 23, and two second through holes 24. The two second grooves 22 are located on both sides of the first groove 21. One second through hole 24 connects one second groove 22 to the outside, and one first through hole 23 connects one second groove 22 to one side of the first groove 21. The limiting hole 31 passes through the first limiting member 3. There are also two first extensions 42, located at both ends of the top plate 41. During assembly, the limiting shaft 121 of one propeller 1 is inserted into one second groove 22 through one first through hole 23. The limiting part 1211 enters the second groove 22 from one side along with the limiting shaft 121, and then enters the first groove 21 through one second through hole 24. It is also inserted into the limiting hole 31 from one side. The limiting shaft 121 of one propeller 1 enters from the other side. The first through hole 23 is inserted into another second groove 22. The limiting part 1211 enters the second groove 22 from one side along with the limiting shaft 121, and then enters the first groove 21 through another second through hole 24. It is also inserted into the limiting hole 31 from the other side, so that one first limiting member 3 simultaneously restricts the rotation of two first limiting members 3. Then, the second limiting member 4 is assembled. A second extension 43 of the second limiting member 4 is inserted into a second groove 22. The second extension is engaged with the limiting groove 1212 of the limiting shaft 121 of the propeller 1, thereby preventing the two propellers 1 from detaching from the propeller base 2. At this time, the top plate 41 of the second limiting member 4 spans the first limiting member 3. The second limiting member 4 also serves to prevent the first limiting member 3 from detaching from the first groove 21. Finally, the locking component 5 is assembled. The locking component 5 abuts against the first limiting member 3, restricting the first limiting member 3 to the propeller base 2. Of course, in some embodiments, the movable groove 32 may be through the first limiting member 3 to divide the first limiting member 3 into two independent parts. In other words, the first limiting member 3 is composed of two independent parts, and the two parts are spaced apart to form the movable groove 32. The second extension 43 of the second limiting member 4 is inserted between the two independent parts, and a propeller 1 is inserted into one part.

[0030] For the aforementioned propeller 1, the propeller 1 includes a blade 11 and a propeller support 12. The blade 11 is fixed to one end of the propeller support 12, and the limiting shaft 121 is provided at the other end of the propeller support 12. The propeller support 12 is provided with a mounting groove 122, a third through hole 123 and a fourth through hole 124. The mounting groove 122 is opened at one end of the propeller support 12 to accommodate the root of the blade 11. The third through hole 123 and the fourth through hole 124 are respectively connected to the mounting groove 122, and the third through hole 123 and the fourth through hole 124 are respectively located on the opposite side walls of the mounting groove 122.

[0031] Furthermore, the propeller 1 also includes a propeller pin 13 and a screw 14. The propeller pin 13 passes through the third through hole 123 and the blade 11. The screw 14 passes through the fourth through hole 124 and is screwed onto the propeller pin 13. The propeller pin 13 and the screw 14 force the propeller bracket 12 to clamp and fix the blade 11 on both sides of the mounting groove 122. Specifically, when assembling the propeller 1 assembly, the root of the blade 11 is placed in the mounting groove 122. The propeller pin 13 passes through the third through hole 123 and the pin hole at the root of the blade 11 in sequence. The screw 14 passes through the fourth through hole 124 and is screwed into the threaded hole at the end of the propeller pin 13. By tightening the screw 14, the propeller bracket 12 clamps and fixes the blade 11 on both sides of the mounting groove 122.

[0032] In some embodiments, to reduce frictional wear between the root of the blade 11 and the propeller support 12 and extend the component life, the propeller 1 further includes two gaskets 15. The propeller support 12 has receiving grooves 1221 on both side walls of the mounting groove 122. One gasket 15 is received within the receiving groove 1221 on one side wall of the mounting groove 122, and the gasket 15 at least partially protrudes from the receiving groove 1221. After assembly, the gasket 15 is placed between the side wall of the mounting groove 122 and the blade 11. A propeller pin 13 passes through one of the gaskets 15, and a screw 14 passes through the other gasket 15. The gaskets 15 can be made of wear-resistant materials, such as copper or engineering plastics, effectively protecting the propeller support 12 and the blade 11.

[0033] In this embodiment of the invention, the propeller device includes a propeller 1, a propeller base 2, a first limiting member 3, a second limiting member 4, and a locking assembly 5. The propeller 1 includes a blade 11 and a propeller support 12. The blade 11 is fixed to one end of the propeller support 12, and the other end of the propeller support 12 is provided with a limiting shaft 121. The limiting shaft 121 is provided with a limiting part 1211 and is pivotally connected to the propeller base 2. The first limiting member 3 and the second limiting member 4 are both separably disposed on the propeller base 2. The first limiting member 3 is provided with a limiting hole 31, and the limiting part 1211 is inserted into the limiting hole 31. When the first limiting member 3 is disposed on the propeller base 2, the limiting part 1211 is inserted into the limiting hole 31. The limiting part 1211 and the limiting hole 31 cooperate to limit the rotation angle of the propeller 1 relative to the propeller base 2. When the second limiting member 4 is disposed on the propeller base 2, the second limiting member 4 is engaged with the limiting shaft 121 and limits the rotation angle of the propeller 1. The propeller bracket 12 detaches from the propeller base 2 along the axial direction of the limiting shaft 121. The locking component 5 is detachably mounted on the propeller base 2. When the locking component 5 is fixed to the propeller base 2, it restricts the first limiting member 3 and the second limiting member 4 to the propeller base 2. When it is necessary to adjust the pitch of the propeller 1, first remove the locking component 5, then remove the second limiting member 4 and the first limiting member 3, and separate the propeller 1 from the propeller base 2. Then replace the first limiting member 3 with one of different angles in the limiting hole 31, and then reinstall the replaced first limiting member 3 back into the propeller base 2. Then insert the propeller 1 into the propeller base 2. At this time, the limiting part 1211 of the propeller 1 is inserted into the limiting hole 31 of the new first limiting member 3. At this time, the angle of the propeller 1 is adjusted, thereby adjusting the pitch of the propeller 1. Finally, the second limiting member 4 and the locking component 5 are reinstalled respectively. There is no need to use a hollow shaft motor, which reduces costs.

[0034] The present invention also provides an embodiment of a rotorcraft, which includes a drive motor (not shown) and the aforementioned propeller assembly. The propeller base 2 of the propeller assembly is mounted on the output end of the drive motor. Typically, the propeller base 2 is provided with mounting holes (not shown in the figure). The propeller base 2 is mounted on the output end of the drive motor by fasteners such as screws 14. When the drive motor rotates, it drives the entire propeller assembly to rotate, providing lift or thrust to the aircraft.

[0035] For the structure and function of the propeller device, please refer to the above embodiments, which will not be repeated here; It should be noted that while the preferred embodiments of the present invention are given in the specification and accompanying drawings, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are not intended to impose additional limitations on the content of the present invention; their purpose is to provide a more thorough and comprehensive understanding of the disclosure of the present invention. Furthermore, the above-described technical features can be combined with each other to form various embodiments not listed above, all of which are considered to be within the scope of the present invention specification. Moreover, those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A propeller device, characterized in that, include: A propeller includes blades and a propeller support. The blades are fixed to one end of the propeller support, and a limiting shaft is provided at the other end of the propeller support. The limiting shaft is provided with a limiting part. The propeller base, wherein the limiting shaft is pivotally connected to the propeller base; The first limiting member is detachably disposed on the propeller base. The first limiting member is provided with a limiting hole. When the first limiting member is disposed on the propeller base, the limiting part is inserted into the limiting hole. The limiting part and the limiting hole cooperate to limit the rotation angle of the propeller relative to the propeller base. The second limiting member is detachably disposed on the propeller base. When the second limiting member is disposed on the propeller base, the second limiting member is engaged with the limiting shaft, and the second limiting member restricts the propeller support from disengaging from the propeller base along the axial direction of the limiting shaft. A locking component is detachably disposed on the propeller base, and the locking component is used to fix the first limiting member and the second limiting member to the propeller base.

2. The propeller device according to claim 1, characterized in that, The propeller base is provided with a first groove, the first limiting member is accommodated in the first groove, the inner wall of the first groove is attached to the outer wall of the first limiting member and restricts the rotation of the first limiting member relative to the propeller base, and the limiting part is inserted into the first groove.

3. The propeller device according to claim 2, characterized in that, The paddle base is also provided with a second groove, a first through hole and a second through hole. The first through hole connects the second groove to the outside, and the second through hole connects the first groove and the second groove. The limiting shaft is inserted into the second groove from the first through hole, and the limiting part is inserted into the first groove from the second through hole. The side wall of the limiting shaft is provided with a limiting groove. The second limiting member includes a top plate and a first extension extending from the top plate. When the second limiting member is installed on the paddle base, the top plate covers the first limiting member, and the first extension simultaneously extends into the second groove and is inserted into the limiting groove. The locking component covers the top plate to fix the second limiting member to the paddle base.

4. The propeller device according to claim 3, characterized in that, The first limiting member has a movable groove, and the second limiting member has a second extension. When the second limiting member is installed on the paddle base, the second extension extends into the movable groove and restricts the first limiting member from moving axially along the limiting shaft.

5. The propeller device according to claim 3, characterized in that, The locking component The device includes a spring clip, which includes two clamping parts and a connecting part. The two clamping parts are fixed relative to each other in the connecting part, and the clamping parts are provided with protrusions. Both sides of the propeller base are provided with snap-fit ​​grooves. The protrusion of one of the clamping parts is engaged with one of the snap-fit ​​grooves so that the spring clip is engaged with the propeller base. The connecting part covers the opening of the first groove and the second groove. The connecting part abuts against the second limiting member to fix the second limiting member to the propeller base.

6. The propeller device according to claim 5, characterized in that, The locking assembly further includes two triggers, each trigger comprising a connecting arm and two fixed arms. The two fixed arms are fixed to both ends of the connecting arm, and the two fixed arms of the trigger are respectively fixed to both sides of a clamping portion. The connecting arm protrudes from the connecting portion, and the connecting arms of the two triggers are arranged opposite to each other.

7. The propeller device according to claim 6, characterized in that, Both ends of the clamping part are provided with connecting holes, and the two fixed arms of the trigger are respectively inserted into the two connecting holes of the clamping part.

8. The propeller device according to any one of claims 1-7, characterized in that, The propeller support is provided with a mounting groove, a third through hole and a fourth through hole. The third through hole and the fourth through hole are respectively connected to the mounting groove, and the third through hole and the fourth through hole are respectively located on the two side walls of the mounting groove. The propeller also includes a propeller pin and a screw. The propeller pin passes through the third through hole and the propeller blade. The screw passes through the fourth through hole and is screwed to the propeller pin. The propeller bracket clamps and fixes the propeller blade on both sides of the mounting groove.

9. The propeller device according to claim 8, characterized in that, The paddle support is provided with receiving slots on both side walls of the mounting slot; The propeller also includes two gaskets, one of which is received in a receiving groove on one side wall of the mounting groove and at least partially protrudes from the receiving groove. The gasket is placed between the side wall of the mounting groove and the propeller blade. The propeller pin passes through one of the gaskets, and the screw passes through the other gasket.

10. A rotorcraft, characterized in that... It includes a drive motor and a propeller device as described in any one of claims 1-9, wherein the propeller base of the propeller device is mounted on the output end of the drive motor.

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