Tilting automatic variable pitch propeller device

Abstract

The present application discloses a tilting automatic variable pitch propeller device, belonging to the technical field of unmanned aerial vehicles. The tilting automatic variable pitch propeller device of the present application includes: a seat body; a rotating motor rotatably arranged on the seat body; a driving device arranged on the seat body and connected to the rotating motor for driving the rotating motor to rotate relative to the seat body; a propeller hub fixedly arranged on a rotating shaft; a plurality of propeller blades, each propeller blade being rotatably arranged on the propeller hub, and a passive block being arranged on the propeller blade deviating from its axis; a linkage variable pitch assembly including a linkage member and a variable pitch member, the variable pitch member being connected to the passive block; the linkage member connecting the variable pitch member and the seat body. The tilting automatic variable pitch propeller device of the present application can realize automatic change of the propeller pitch while the propeller is tilting, so that the propeller has a high driving efficiency, which is beneficial to improving the efficiency of the power system of a tilting rotor unmanned aerial vehicle; moreover, the propeller has a compact structure and simple pitch control.

Description

Technical Field

[0001] This application relates to the technical field of unmanned aerial vehicles, and particularly to antilateral automatic variable pitch propeller device. Background Art

[0002] A variable pitch propeller is a propeller that can change the blade angle according to flight speed and altitude during flight. During the takeoff phase, the forward speed of the aircraft is small, and the variable pitch device reduces the blade angle of the propeller so that the engine operates at the maximum rotational speed and maximum power state, thereby enabling the propeller to generate the maximum thrust; during the level flight phase, the variable pitch mechanism changes the pitch to a high pitch propeller suitable for this flight state, so that the propeller can obtain the maximum useful power from the engine at the maximum rotational speed. This is mostly applied to fixed-wing aircraft with fixed propellers.

[0003] In the field of tiltrotor aircraft, the propeller can be tiltably arranged on the wing. In the vertical takeoff state, the propeller tilts relative to the wing to a vertical state, enabling the aircraft to take off and land vertically; when the aircraft rises to a certain height, the propeller tilts relative to the wing from the vertical state to the horizontal straight state, enabling the aircraft to obtain the level flight ability. In such aircraft, due to structural limitations, the propeller cannot take into account the variable pitch requirement when tiltably arranged, resulting in the propeller being unable to exert its maximum driving efficiency. Summary of the Invention

[0004] This application aims to solve one of the technical problems existing in the prior art. For this reason, this application proposes antilateral automatic variable pitch propeller device, which can automatically change the pitch while the propeller is tilting, enabling the propeller to have a high driving efficiency, which is beneficial to improving the power system efficiency of tiltrotor unmanned aerial vehicles; and, the propeller structure is compact and the pitch change control is simple.

[0005] According to the antilateral automatic variable pitch propeller device of this application, it includes:

[0006] A seat body;

[0007] A rotating motor, rotatably arranged on the seat body;

[0008] A driving device, arranged on the seat body and connected to the rotating motor, for driving the rotating motor to rotate relative to the seat body;

[0009] A propeller hub, fixedly arranged on the rotating shaft;

[0010] A plurality of blades, each blade is rotatably arranged on the propeller hub, and a passive block is arranged on the blade deviating from its axis;

[0011] A linkage variable pitch assembly, including a linkage member and a pitch change member, the pitch change member is connected to the passive block; the linkage member connects the pitch change member and the seat body;

[0012] When the rotary electric machine rotates relative to the seat body, the linkage member can enable the pitch-changing member to drive the passive block to rotate along the blade axis, so as to realize the change of the blade pitch.

[0013] The tilting type automatic pitch-changing propeller device according to the embodiment of the present application has at least the following beneficial effects:

[0014] The driving device is arranged on the seat body and connected to the rotary electric machine, and is used to drive the rotary electric machine to rotate, so as to realize the tilting of the propeller device, so that it can be switched between the vertical state and the horizontal state. At the same time, a linkage pitch-changing assembly is provided. When the rotary electric machine rotates relative to the seat body and the propeller is switched between the vertical state and the horizontal state, the pitch-changing member can drive the blade to change its pitch, so that the propeller has a high driving efficiency in different flight states of the aircraft. With such a setting, the linkage pitch-changing assembly can be linked with the driving device, and the pitch control is simple.

[0015] According to some embodiments of the present application, the pitch-changing member includes a pitch-changing rod and a pitch-changing disc; the rotating shaft of the rotary electric machine is hollow, and the pitch-changing rod is inserted into the hollow interior of the rotating shaft; the pitch-changing disc is arranged on the rotating shaft and connected to the pitch-changing rod; a slideway matched with the passive block is arranged on the pitch-changing disc, and the slideway is used to push the passive block to rotate along the axis of the blade.

[0016] According to some embodiments of the present application, the passive block includes a connecting portion and an abutting portion, the connecting portion is arranged perpendicular to the blade axis, and the abutting portion is arranged on the connecting portion away from the blade axis along the blade axis direction; the abutting portion is inserted into the slideway.

[0017] According to some embodiments of the present application, the linkage member includes an arc-shaped chute opened on the seat body and a sliding member with one end connected to the pitch-changing rod and the other end inserted into the chute; the distances between the points on the chute and the rotation axis of the rotary electric machine are not equal; the pitch-changing disc is slidably sleeved on the rotating shaft.

[0018] According to some embodiments of the present application, the slideway is an annular slideway arranged around the circumferential surface of the pitch-changing disc; each of the passive blocks is matched with the annular slideway.

[0019] According to some embodiments of the present application, the pitch-changing rod is rotatably connected to the hollow interior of the rotating shaft, and a connecting component is connected between the pitch-changing rod and the pitch-changing disc. The connecting component includes a connecting seat and a connecting rod. The connecting seat is rotatably arranged on the pitch-changing rod, and the two ends of the connecting rod are respectively fixedly connected to the connecting seat and the pitch-changing disc.

[0020] According to some embodiments of the present application, a limiting groove is axially provided on the rotating shaft, and the connecting seat is inserted into the limiting groove.

[0021] According to some embodiments of the present application, the driving device includes a driving motor and a two-link mechanism, one end of the two-link mechanism is connected to the driving motor, and the other end is connected to the rotating motor.

[0022] Additional aspects and advantages of the present application will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, wherein:

[0024] Figure 1 is a perspective view of a tilting type automatic variable pitch propeller device in an embodiment of the present application.

[0025] Figure 2 is a front view of a tilting type automatic variable pitch propeller device in an embodiment of the present application.

[0026] Figure 3 is a perspective view of a tilting type automatic variable pitch propeller device in an embodiment of the present application.

[0027] Figure 4 is a perspective view of a tilting type automatic variable pitch propeller device in an embodiment of the present application.

[0028] Figure 5 is a perspective view showing the specific structure of the variable pitch member in an embodiment of the present application.

[0029] Figure 6 is a perspective view showing the specific structure of the variable pitch member in an embodiment of the present application.

[0030] Figure 7 is a perspective view of a blade in an embodiment of the present application.

[0031] Figure 8 is a perspective view of a variable pitch disk in an embodiment of the present application.

[0032] Figure 9 is a perspective view showing the specific structure of the variable pitch member in another embodiment of the present application.

[0033] Figure 10 is a schematic diagram of the tilting type automatic variable pitch propeller device in a horizontal state in an embodiment of the present application.

[0034] Figure 11Schematic diagram of a tilting type automatic pitch propeller device in a conversion state in an embodiment of the present application. Detailed implementation manners

[0035] The embodiments of the present application will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary only for explaining the present application and should not be construed as a limitation to the present application.

[0036] In the description of the present application, it should be understood that the orientation descriptions, such as up, down, left, right, front, back, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0037] In the description of the present application, unless otherwise clearly defined, words such as setting, installation, connection, etc. should be understood in a broad sense. Those skilled in the art can reasonably determine the specific meanings of the above words in the present application in combination with the specific content of the technical solution.

[0038] The following is based on Figures 1 to 11 Describe the tilting type automatic pitch propeller device of the present application.

[0039] Refer to Figures 1 to 4 , the tilting type automatic pitch propeller device of the present application includes:

[0040] A seat body 100;

[0041] A rotating motor 200, rotatably arranged on the seat body 100;

[0042] A driving device 300, arranged on the seat body 100 and connected to the rotating motor 200, for driving the rotating motor 200 to rotate relative to the seat body 100;

[0043] A propeller hub 400, fixedly arranged on a rotating shaft 210;

[0044] A plurality of propeller blades 500, each propeller blade 500 is rotatably arranged on the propeller hub 400, and a passive block 510 is arranged on the propeller blade 500 deviating from its axis;

[0045] A linkage pitch-changing assembly 600, including a linkage member 610 and a pitch-changing member 620, the pitch-changing member 620 is connected to the passive block 510; the linkage member 610 connects the pitch-changing member 620 and the seat body 100;

[0046] When the rotary electric machine 200 rotates relative to the base body 100, the linkage member 610 can cause the pitch-changing member 620 to drive the passive block 510 to rotate along the axis of the blade 500, so as to realize the change of the pitch of the blade 500.

[0047] It can be understood that a plurality of blades 500 are provided. Generally speaking, three blades 500 are provided. At the same time, the base body 100 is fixedly arranged. Generally speaking, the base body 100 is fixedly arranged on the wing. The rotary electric machine 200 includes a base 220, and its base 220 is rotatably arranged on the base body 100.

[0048] It can be understood that the driving device 300 is fixedly arranged on the base body 100, and it can be a driving motor 310 and a gear assembly. The gear assembly includes a first gear arranged on the base 220 of the rotary electric machine 200 and a second gear arranged on the driving end of the driving motor 310, and the first gear and the second gear mesh with each other; the driving device 300 can also be a driving motor 310 and a connecting rod assembly. The connecting rod assembly connects the driving motor 310 and the base 220 of the rotary electric machine 200, and this solution will be elaborated in detail in the following embodiments.

[0049] When the driving device 300 drives the rotary electric machine 200 to rotate relative to the base body 100 to the vertical state, the aircraft is in the vertical take-off and landing state; when the driving device 300 drives the rotary electric machine 200 to rotate relative to the base body 100 to the horizontal state, the aircraft is in the level flight state. With such a setting, the aircraft can have the ability of vertical take-off and landing, and the thrust of the propeller is large in its level flight state, so that a relatively large cruising speed can be achieved.

[0050] The linkage pitch-changing assembly 600 includes a linkage member 610 and a pitch-changing member 620. Among them, the linkage member 610 connects the pitch-changing member 620 and the base body 100, and the pitch-changing member 620 connects the linkage member 610 and the passive block 510 on the blade 500. When the rotary electric machine 200 rotates relative to the base body 100, the linkage member 610 drives the pitch-changing member 620 to move, so that the pitch-changing member 620 drives the passive block 510 on the blade 500 to rotate, and finally the pitch of the blade 500 is changed.

[0051] For example, the pitch-changing member 620 can be arranged to be composed of a pitch-changing rod 621 and a pitch-changing disc 622, and both ends of the pitch-changing rod 621 are respectively connected to the pitch-changing disc 622 and the linkage member 610.

[0052] Of course, the linkage pitch-changing assembly 600 can also be arranged such that the linkage member 610 is used to drive the pitch-changing rod 621 to move linearly, the pitch-changing disk 622 is fixedly connected to the pitch-changing rod 621 at the axial position of the pitch-changing rod 621. When the rotating motor 200 rotates relative to the base body 100, the linkage member 610 follows the rotation of the rotating motor 200 and pushes the pitch-changing rod 621 to move linearly, so that the pitch-changing rod 621 drives the pitch-changing disk 622 to move linearly. When the pitch-changing disk 622 moves linearly, it pushes the driven block 510 to rotate around the axis of the blade 500, finally realizing the change of the pitch of the blade 500.

[0053] Regarding the implementation manner of the above-mentioned linkage pitch-changing assembly 600, it will be specifically described below and will not be elaborated here.

[0054] By setting like this, the linkage pitch-changing assembly 600 can be linked with the driving device 300. When the rotating motor 200 rotates relative to the base body 100, the linkage pitch-changing assembly 600 can drive the change of the pitch of the blade 500 following the position state of the propeller. There is no need to additionally set up structures such as a pitch-changing driving motor 310, and the pitch-changing control is simple.

[0055] Specifically, referring to Figure 2 、 Figure 10 and Figure 11 , during the vertical takeoff stage of the aircraft, the speed of the aircraft is relatively small. At this time, the linkage pitch-changing assembly 600 drives the blade 500 to be at a small pitch, so that the driving efficiency of the propeller is relatively high; during the level flight stage of the aircraft, the speed of the aircraft is relatively large. At this time, the linkage pitch-changing assembly 600 drives the blade 500 to be at a large pitch, so that the driving efficiency of the propeller is relatively high, so as to achieve high aerodynamic efficiency and is beneficial to saving flight energy consumption.

[0056] Referring to Figure 5 、 Figure 6 and Figure 9 , in some embodiments of the present application, the pitch-changing member 620 includes a pitch-changing rod 621 and a pitch-changing disk 622; the rotating shaft 210 of the rotating motor 200 is hollowly arranged, and the pitch-changing rod 621 is inserted into the hollow interior of the rotating shaft 210; the pitch-changing disk 622 is arranged on the rotating shaft 210 and is connected to the pitch-changing rod 621; a slideway 6221 cooperating with the driven block 510 is arranged on the pitch-changing disk 622, and the slideway 6221 is used to push the driven block 510 to rotate along the axis of the blade 500.

[0057] It can be understood that the rotating shaft 210 of the rotating electric machine 200 is hollowly arranged. With such an arrangement, the pitch-changing rod 621 can pass through the hollow interior of the upper rotating shaft 210 of the rotating electric machine 200. At the same time, one end of the pitch-changing rod 621 is connected to the linkage member 610, and the other end is connected to the pitch-changing disc 622. The rotating shaft 210 of the rotating electric machine 200 is arranged such that when the rotating shaft 210 rotates, the rotating shaft 210 will not drive the pitch-changing rod 621 to rotate together; and when the propeller blade 500 rotates, the pitch-changing rod 621 will not interfere with the rotation of the propeller hub 400 either. With such an arrangement, when the driving device 300 drives the rotating electric machine 200 to rotate so that the unmanned aerial vehicle switches between the vertical takeoff and landing state and the level flight state, the linkage pitch-changing assembly 600 can automatically change the pitch of the propeller blade 500 following the rotation of the rotating electric machine 200 to achieve the linkage change of the pitch.

[0058] Further, the pitch-changing disc 622 is arranged on the rotating shaft 210 and connected to the pitch-changing rod 621. For example, in the case where the linkage member 610 is used to drive the pitch-changing rod 621 to move linearly, a bearing is connected between the pitch-changing disc 622 and the pitch-changing rod 621. Therefore, the axial position of the pitch-changing disc 622 on the pitch-changing rod 621 is relatively fixed with respect to the pitch-changing rod 621.

[0059] Furthermore, a slideway 6221 matching with the passive block 510 is arranged on the pitch-changing disc 622. The passive block 510 is inserted into the slideway 6221 and the side wall of the slideway 6221 abuts against the passive block 510. With such an arrangement, the connection structure between the passive block 510 and the pitch-changing disc 622 is simple and the connection is stable. During the high-speed rotation of the propeller, the failure rate of the propeller is low, and moreover, the later assembly and maintenance are convenient.

[0060] Reference Figure 7 , in some embodiments of the present application, the passive block 510 includes a connecting portion 512 and an abutting portion 511. The connecting portion 512 is arranged perpendicular to the axis of the propeller blade 500, and the abutting portion 511 is arranged on the connecting portion 512 at one end far from the axis of the propeller blade 500 along the axis direction of the propeller blade 500; the abutting portion 511 is inserted into the slideway 6221.

[0061] It can be understood that the abutting portion 511 is cylindrical. Further, one end of the abutting portion 511 inserted into the slideway 6221 can be spherical, and the depth of the slideway 6221 is greater than the length of the abutting portion 511. When the pitch-changing disc 622 slides axially along the rotating shaft 210 or rotates on the rotating shaft 210, the side wall of the slideway 6221 on the pitch-changing disc 622 abuts against the abutting portion 511 and drives the abutting portion 511 to rotate around the axis of the propeller blade 500. Therefore, with such an arrangement of the abutting portion 511, it can be avoided that the free end of the abutting portion 511 interferes with the bottom of the slideway 6221, which is beneficial to improving the smoothness and reliability of the pitch-changing operation.

[0062] ReferenceFigure 4 In some embodiments of the present application, the linkage member 610 includes an arc-shaped chute 612 formed in the base body 100, and a sliding member 611 having one end connected to the pitch-changing rod 621 and the other end inserted into the chute 612; the distances between the points on the chute 612 and the rotation axis of the rotation motor 200 are not equal; the pitch-changing disc 622 is slidably sleeved on the rotating shaft 210.

[0063] It should be understood that the chute 612 has different curvatures, and the center of curvature of the chute 612 is on the rotation axis of the rotation motor 200. Specifically, the distances from the points on the chute 612 to the rotation axis of the rotation motor 200 are gradually shortened; when the rotation motor 200 rotates relative to the base body 100, the rotation motor 200 rotates around the center of curvature of the chute 612.

[0064] Furthermore, the included angle between the two ends of the chute 612 is a right angle, and the distance from one end of the chute 612 to its center of curvature is less than the distance from the other end of the chute 612 to its center of curvature. That is, the difference between the distances from the two ends of the chute 612 to its center of curvature is the moving distance of the pitch-changing disc 622 in the axial direction of the rotating shaft 210 of the rotation motor 200. It should be understood that the longer the moving distance of the pitch-changing disc 622 in the axial direction of the rotating shaft 210, the larger the angle by which the passive block 510 on the blade 500 rotates relative to the axis of the blade 500. Therefore, the change in the blade angle of the blade 500 is larger, that is, the pitch change of the blade 500 is greater. For this reason, for the time being, the two ends of the chute 612 are called the first end and the second end, and the distance from the first end to the rotation axis of the rotation motor 200 is greater than the distance from the second end to the rotation axis of the rotation motor 200.

[0065] The sliding member 611 can be a bolt. One end of the bolt is fixedly connected to the pitch-changing rod 621, and the other end is inserted into the chute 612. When the rotation motor 200 rotates relative to the base body 100, the bolt slides to different positions of the chute 612, thereby driving the pitch-changing rod 621 to move axially along the rotating shaft 210, so that the slideway 6221 of the pitch-changing disc 622 pushes the passive block 510 to rotate, realizing the change in the pitch of the blade 500.

[0066] Reference Figure 5 、 Figure 6 and Figure 8 In some embodiments of the present application, the slideway 6221 is an annular slideway provided around the circumferential surface of the pitch-changing disc 622; each passive block 510 is matched with the annular slideway.

[0067] It can be understood that, specifically, the annular slideway is arranged around the circumferential surface of the pitch-changing disc 622, and the passive blocks 510 of each blade 500 are inserted into the annular slideway; similar to the above embodiment, the width of the annular slideway is slightly larger than the diameter of the abutting portion 511 on the passive block 510. Therefore, the frictional force of the abutting portion 511 sliding in the annular slideway can be reduced.

[0068] When the pitch-changing disc 622 slides axially on the rotating shaft 210, the side wall of the annular slideway pushes the abutting portion 511 to slide in the annular slideway, so that the passive block 510 drives the blade 500 to rotate, thereby realizing the change of the blade angle, that is, the pitch of the blade 500 changes.

[0069] The slideway 6221 is arranged in this way. On the one hand, during assembly or disassembly, since only a single slideway 6221 is provided, after assembly, the debugging work of each blade 500 is simple and fast, which can effectively reduce the situation that each blade 500 is not assembled in place due to processing errors, and later maintenance is convenient; moreover, the connection structure between the pitch-changing disc 622 and the rotating shaft 210 or the hub 400 is simpler, which is convenient for processing.

[0070] It can be understood that the pitch-changing disc 622 is slidably sleeved on the rotating shaft 210. Generally speaking, considering the convenience of processing and adaptability problems of the rotating shaft 210, its cross-section is generally circular. Therefore, when the pitch-changing disc 622 is slidably sleeved on the rotating shaft 210, it is inevitable to have relative rotation with the rotating shaft 210 when the rotating shaft 210 rotates, resulting in certain errors in assembly. For this reason, a guiding device is arranged between the pitch-changing disc 622 and the hub 400, so that the pitch-changing disc 622 can only slide axially along the rotating shaft 210 and cannot rotate, so as to improve the accuracy of controlling the pitch change and reduce the assembly difficulty. Specifically, the guiding device is a guiding pin 410 fixedly arranged on the hub 400 and a guiding groove 6222 axially arranged on the pitch-changing disc 622, and the guiding pin 410 is inserted into the guiding groove 6222, so as to realize the circumferential positioning of the pitch-changing disc 622.

[0071] Reference Figure 5 and Figure 6 In some embodiments of the present application, the pitch-changing rod 621 is rotatably connected to the hollow interior of the rotating shaft 210, and a connecting component is connected between the pitch-changing rod 621 and the pitch-changing disc 622. The connecting component includes a connecting seat 623 and a connecting rod 624. The connecting seat 623 is rotatably arranged on the pitch-changing rod 621, and both ends of the connecting rod 624 are fixedly connected to the connecting seat 623 and the pitch-changing disc 622 respectively.

[0072] It can be understood that a bearing is sleeved on the pitch-changing rod 621. It should be understood that the bearing is not in a tight fit with the hollow interior of the rotating shaft 210, so that while the pitch-changing rod 621 slides relative to the rotating shaft 210, the wobbling of the pitch-changing rod 621 relative to the rotating shaft 210 is reduced, which is beneficial to improving the smoothness of the pitch-changing operation. The connecting seat 623 is rotatably connected to the pitch-changing rod 621. Similarly, it can be that the connecting seat 623 and the pitch-changing rod 621 can be connected by a bearing, so as to maintain the relative fixation of the connecting seat 623 and the pitch-changing rod 621 in the axial position. A connecting rod 624 is connected between the connecting seat 623 and the pitch-changing disc 622. With such a setting, while maintaining the stable connection between the pitch-changing disc 622 and the pitch-changing rod 621, the volume and mass of the pitch-changing disc 622 can be reduced, so that the shaft load on the rotating shaft 210 of the rotating motor 200 is smaller, thereby improving the driving efficiency of the rotating motor 200; and, the pitch-changing disc 622 can be completely sleeved on the rotating shaft 210, so that the stability of the pitch-changing disc 622 sliding on the rotating shaft 210 is higher.

[0073] Reference Figure 3 , in some embodiments of the present application, a limiting groove 211 is axially provided on the rotating shaft 210, and the connecting seat 623 is inserted into the limiting groove 211.

[0074] It can be understood that a limiting groove 211 is axially opened on the rotating shaft 210, and the connecting seat 623 can be inserted into the limiting groove 211 and connect the pitch-changing rod 621 and the connecting rod 624. With such a setting, a fairing can be assembled at one end of the rotating shaft 210 far from the rotating motor 200, thereby reducing the wind resistance of the propeller when the aircraft is flying level.

[0075] Reference Figure 3 and Figure 5 , in some embodiments of the present application, the driving device 300 includes a driving motor 310 and a two-link mechanism 320. One end of the two-link mechanism 320 is connected to the driving motor 310, and the other end is connected to the rotating motor 200.

[0076] It can be understood that an extension arm 221 is provided on the mounting seat of the rotating motor 200, and, viewed from the side, the extension arm 221 is arranged at an angle with the rotating shaft 210. The two-link mechanism 320 includes a first link 321 and a second link 322. Among them, the first link 321 is connected to the driving end of the driving motor 310, and both ends of the second link 322 are respectively connected to the extension arm 221 and the first link 321. Specifically, when the propeller is in the vertical state, the second link 322 is in the horizontal state, and when the propeller is in the horizontal state, the second link 322 is in the inclined state. With such a setting of the driving device 300, it has a light weight, a simple and stable structure, and a low failure rate, and can drive the propeller to change the position state and the pitch in a timely, stable and efficient manner.

[0077] The embodiments of the present application have been described in detail above in conjunction with the accompanying drawings. However, the present application is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present application within the scope of knowledge possessed by those of ordinary skill in the art.

Claims

1. A tilting type automatic variable pitch propeller device, characterized in that, Comprising: A seat body; A rotary motor rotatably arranged on the seat body; A driving device arranged on the seat body and connected to the rotary motor, for driving the rotary motor to rotate relative to the seat body; A hub fixedly arranged on a rotating shaft; A plurality of blades, each blade rotatably arranged on the hub, and a passive block is arranged on the blade deviating from its axis; A linkage pitch-changing assembly, including a linkage member and a pitch-changing member, the pitch-changing member being connected to the passive block; The linkage member connects the pitch-changing member and the seat body; When the rotary motor rotates relative to the seat body, the linkage member can enable the pitch-changing member to drive the passive block to rotate along the axis of the blade, so as to realize the change of the pitch of the blade; Wherein, the pitch-changing member includes a pitch-changing rod and a pitch-changing disc; the rotating shaft of the rotary motor is hollow, and the pitch-changing rod is arranged through the hollow interior of the rotating shaft; the pitch-changing disc is arranged on the rotating shaft and connected to the pitch-changing rod; a slideway matching with the passive block is arranged on the pitch-changing disc, and the slideway is used for pushing the passive block to rotate along the axis of the blade; Wherein, a guiding device is arranged between the pitch-changing disc and the hub, and the guiding device is a guiding pin fixedly arranged on the hub and a guiding groove axially arranged on the pitch-changing disc, and the guiding pin is inserted into the guiding groove.

2. The tilting type automatic pitch propeller device according to claim 1, characterized in that: The passive block includes a connecting portion and an abutting portion, the connecting portion is arranged perpendicular to the axis of the blade, and the abutting portion is arranged on the connecting portion at one end far from the axis of the blade along the axis direction of the blade; the abutting portion is inserted into the slideway.

3. The tilting type automatic variable pitch propeller device according to claim 1, characterized in that: The linkage member includes an arc-shaped chute opened on the seat body, and a sliding member with one end connected to the pitch-changing rod and the other end inserted into the chute; the distances between the points on the chute and the axis of rotation of the rotary motor are not equal; the pitch-changing disc is slidably sleeved on the rotating shaft.

4. The tilting type automatic pitch propeller device according to claim 3, characterized in that: The slideway is an annular slideway arranged around the circumferential surface of the pitch-changing disc; each passive block is matched with the annular slideway.

5. The tilting type automatic variable pitch propeller device according to claim 3, wherein: The pitch-changing rod is rotatably connected to the hollow interior of the rotating shaft, and a connecting component is connected between the pitch-changing rod and the pitch-changing disc, and the connecting component includes a connecting seat and a connecting rod, the connecting seat is rotatably arranged on the pitch-changing rod, and two ends of the connecting rod are respectively fixedly connected to the connecting seat and the pitch-changing disc.

6. The tilting type automatic variable pitch propeller device according to claim 5, characterized in that: A limiting groove is axially arranged on the rotating shaft, and the connecting seat is arranged through the limiting groove.

7. The tilting type automatic pitch propeller device according to claim 1, wherein: The driving device includes a driving motor and a two-link mechanism, and one end of the two-link mechanism is connected to the driving motor and the other end is connected to the rotary motor.

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