Driving device, propeller and aircraft

Abstract

The utility model relates to a driving device, a propeller and an aircraft, the driving device is used for the propeller of the aircraft, the driving device comprises a rotating body, a first driving part and a variable pitch mechanism, the rotating body is used for being connected with a plurality of blades arranged in the circumferential direction of the rotating body, and the interior of the rotating body is provided with a closed space; the first driving part is connected to the rotating body and is used for driving the rotating body to drive the plurality of paddles to rotate along the circumferential direction of the rotating body; the variable-pitch mechanism comprises a second driving part and an executing part, the executing part is located in the closed space and connected to the multiple paddles, and the second driving part is used for driving the executing part to drive the paddles to rotate around the axes of the paddles so as to change the paddle angles. By means of the technical scheme, the driving device improves the capacity of resisting external environment interference such as rainwater soaking or impurity particle attachment in the using process, normal work of all structural parts in the closed space is guaranteed, and the stability in the using process is guaranteed.

Description

Technical Field

[0001] The present disclosure relates to the field of aviation technology, and in particular to a driving device, a propeller and an aircraft. Background Art

[0002] At present, aircraft are widely used in the civilian field. For example, more and more people use drones for aerial photography and recording, or provide cargo delivery services through drones. It can be seen that the application range of aircraft is very wide.

[0003] Rotorcraft are a common type of aircraft. Their lift and power are provided by the free rotation of the rotor. They have a simple structure and are relatively easy to operate and maintain. During use, as the take-off weight increases, the diameter of the corresponding blades increases, and the rotational inertia of the blades also increases accordingly. Therefore, a variable pitch structure is added to the aircraft. In related technologies, the variable pitch structure is exposed to the outside and is easily affected by the external environment, causing its operation to be obstructed or partially damaged, thereby affecting the drive rotation of the rotor and the variable pitch control, making the aircraft unable to be used normally. Utility Model Content

[0004] The purpose of the present disclosure is to provide a driving device, a propeller and an aircraft, which have strong resistance to external environmental interference and stable operation, so as to at least partially solve the above technical problems.

[0005] In order to achieve the above object, according to a first aspect of the present disclosure, a driving device is provided for a propeller of an aircraft, the driving device comprising:

[0006] A rotating body, used to connect a plurality of blades arranged along the circumference of the rotating body, wherein the interior of the rotating body has a closed space;

[0007] A first driving member, connected to the rotating body, for driving the rotating body to drive the plurality of blades to rotate along the circumference of the rotating body; and

[0008] The variable pitch mechanism comprises a second driving member and an actuator, wherein the actuator is located in the closed space and connected to the plurality of blades, and the second driving member is used to drive the actuator to drive the blades to rotate around their own axes to change the blade angles.

[0009] Optionally, the second driving member is installed on a base with the first driving member, the first driving member has a hollow shaft, the second driving member is located on a side of the first driving member away from the rotating body, the second driving member includes a connected power member and a transmission shaft, the transmission shaft passes through the hollow shaft to extend into the enclosed space and is connected to the actuator, the power member drives the actuator through the transmission shaft to drive the blade to rotate around its own axis.

[0010] Optionally, the first driving member is an outer rotor motor.

[0011] Optionally, the base includes a base and a top seat, the base and the top seat form an installation space, the second driving member is located in the installation space and connected to the base, and the first driving member is located outside the installation space and connected to the top seat.

[0012] Optionally, the actuator includes a sliding member and a connecting rod mechanism, the sliding member is rotatably sleeved on the transmission shaft around the central axis of the transmission shaft and limited to the transmission shaft along the central axis, the sliding member is movably connected to the rotating body along the central axis, the sliding member and each of the blades are connected through the connecting rod mechanism, so that the movement of the sliding member drives the blade to rotate around its own axis, and the power member is used to drive the transmission shaft to reciprocate along the central axis to drive the sliding member to reciprocate synchronously.

[0013] Optionally, the connecting rod mechanism includes a hinged first connecting rod and a second connecting rod, an end of the first connecting rod away from the second connecting rod is hinged to the sliding member, and an end of the second connecting rod away from the first connecting rod is connected to the blade.

[0014] Optionally, the rotating body is provided with connecting pieces corresponding to the plurality of blades one by one along the circumferential direction, the connecting pieces are used to connect the blades, the connecting pieces have a connecting shaft penetrating the rotating body to extend into the enclosed space, the connecting shaft is coaxial with the blades, and the connecting shaft is connected to the connecting rod mechanism;

[0015] A first bearing is sleeved between the connecting shaft and the rotating body, a first limiting structure for limiting the inner ring of the first bearing is arranged on the connecting shaft, and a second limiting structure for limiting the outer ring of the first bearing is arranged on the rotating body.

[0016] Optionally, a second bearing is sleeved between the transmission shaft and the sliding member, a third limiting structure for limiting the inner ring of the second bearing is provided on the transmission shaft, and a fourth limiting structure for limiting the outer ring of the second bearing is provided on the sliding member.

[0017] According to a second aspect of the present disclosure, there is provided a propeller comprising the above-mentioned driving device and a plurality of blades.

[0018] According to a third aspect of the present disclosure, there is provided an aircraft comprising the above-mentioned propeller.

[0019] Through the above technical solution, that is, the actuator in the pitch-changing mechanism is arranged in the closed space inside the rotating body, so that the driving device can improve its ability to resist external environmental interference during use, such as rainwater soaking or foreign particles adhering, etc., to ensure the normal operation of each structural member in the closed space and ensure stability during use. Among them, the use process refers to the pitch-changing process in which the driving device acts on the propeller to drive the actuator to move through the second driving member to drive the blade to rotate around its own axis to change the blade angle, and the first driving member drives the rotating body to drive multiple blades to rotate in the circumferential direction so that the propeller rotates, which can be applied to the work process such as the lifting and movement of the aircraft.

[0020] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0022] Figure 1 is a schematic diagram of the overall structure of an aircraft provided in an exemplary embodiment of the present disclosure;

[0023] Figure 2 is a schematic diagram of a structure in which an actuator provided in an exemplary embodiment of the present disclosure is located in a closed space;

[0024] Figure 3 is a schematic structural diagram of the connection between a pitch-changing mechanism and a blade provided in an exemplary embodiment of the present disclosure;

[0025] Figure 4 is a schematic structural diagram of a connecting rod mechanism provided in an exemplary embodiment of the present disclosure connected to a sliding member;

[0026] Figure 5 is a schematic diagram of a mechanism in which a third limiting structure provided in an exemplary embodiment of the present disclosure acts on a second bearing;

[0027] Figure 6 Schematic diagram of an explosion of a connector and a second limiting structure provided in an exemplary embodiment of the present disclosure.

[0028] Description of Reference Numerals

[0029] 1. blade; 2. rotating body; 21. closed space; 22. guide groove; 23. mounting groove; 3. first driving member; 31. hollow shaft; 4. pitch mechanism; 41. second driving member; 411. power member; 412. transmission shaft; 42. actuator; 421. sliding member; 422. connecting rod mechanism; 4221. first connecting rod; 4222. second connecting rod; 5. base; 51. base; 52. top seat; 53. machine arm; 6. connecting member; 61 , connecting shaft; 62, first fixing member; 63, second fixing member; 64, fastener; 7, first bearing; 71, first limiting structure; 711, first protrusion; 712, first locking nut; 72, second limiting structure; 721, matching member; 8, second bearing; 81, third limiting structure; 811, second protrusion; 812, second locking nut; 82, fourth limiting structure; 821, moving block; 8211, slider; 822, fixed cover plate. DETAILED DESCRIPTION

[0030] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0031] In the present disclosure, unless otherwise stated, "inside" and "outside" refer to the inside and outside of the outline of the corresponding component; "far" and "near" refer to the distance and nearness of the corresponding component in space relative to another component. In addition, the terms "first", "second", etc. used in the present disclosure are to distinguish one element from another element and do not have order and importance. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0032] The driving device, propeller and aircraft in exemplary embodiments of the present disclosure will be described below with reference to the accompanying drawings.

[0033] According to the first aspect of the present disclosure, referring to Figures 1 to 5 The present invention provides a driving device for a propeller of an aircraft, the driving device includes a rotating body 2, a first driving member 3 and a pitch-changing mechanism 4, the rotating body 2 is used to connect a plurality of blades 1 arranged along the circumference of the rotating body 2, and the interior of the rotating body 2 has a closed space 21; the first driving member 3 is connected to the rotating body 2, and is used to drive the rotating body 2 to drive the plurality of blades 1 to rotate along the circumference of the rotating body 2; the pitch-changing mechanism 4 includes a second driving member 41 and an actuator 42, the actuator 42 is located in the closed space 21, the actuator 42 is connected to the plurality of blades 1, and the second driving member 41 is used to drive the actuator 42 to drive the blades 1 to rotate around their own axes to change the blade angles.

[0034] Through the above technical solution, that is, the actuator 42 in the pitch mechanism 4 is arranged in the closed space 21 inside the rotating body 2, so that the driving device can improve its ability to resist external environmental interference during use, such as rainwater soaking or foreign particles adhering, etc., to ensure the normal operation of each structural member in the closed space 21 and ensure stability during use. Among them, the use process refers to the pitch change process in which the driving device acts on the propeller to drive the actuator 42 to move through the second driving member 41 to drive the blade 1 to rotate around its own axis to change the blade angle, and the first driving member 3 drives the rotating body 2 to drive multiple blades 1 to rotate in the circumferential direction so that the propeller rotates, which can be applied to the work process such as the lifting and movement of the aircraft.

[0035] In some embodiments, reference Figures 2 to 4 , the second drive member 41 can be located outside the closed space 21, and the first drive member 3 and the second drive member 41 can be installed on the base 5 in any suitable position relationship. In this way, the second drive member 41 does not rotate synchronously with the rotating body 2, which can reduce the influence of the first drive member 3 and the rotating body 2 on the second drive member 41 when driving the actuator 42 to act, making the pitch change process more stable, and also facilitating the connection between the second drive member 41 and the actuator 42, and also facilitating the electrical connection between the second drive member 41 and the power supply of the aircraft, simplifying the arrangement of the electrical connection, and making the operation of the pitch change mechanism 4 more reliable. Of course, the second drive member 41 can also be located in the closed space 21, so that the second drive member 41 can be protected by the rotating body 2 to reduce the possibility of the second drive member 41 itself being damaged by external environmental factors and affecting the pitch change function. Therefore, the installation position of the second drive member 41 will not affect the pitch change function, and the second drive member 41 can be selectively installed in the closed space 21 or outside the closed space 21 according to actual use requirements, and the present disclosure does not make specific restrictions on this.

[0036] The base 5 can be configured in any suitable manner for mounting the first drive member 3 and the second drive member 41. For example, in some embodiments, refer to Figures 2 to 4The base 5 may include a base 51 and a top seat 52, and the base 51 and the top seat 52 may be connected in a detachable manner to enclose an installation space, wherein the second drive member 41 may be located in the installation space and connected to the base 51, and the first drive member 3 may be located outside the installation space and connected to the top seat 52, so that, on the one hand, the second drive member 41 and the first drive member 3 are arranged at intervals, so that the second drive member 41 drives the actuator 42 to drive the blade 1 to rotate around its own axis to change the pitch of the blade angle, and the first drive member 3 drives the rotating body 2 to drive the plurality of blades 1 to rotate in the circumferential direction so that the propeller rotation process does not interfere with each other as much as possible, so that the drive device works smoothly. On the other hand, similar to the second drive member 41 being located in the closed space 21, at this time, the second drive member 41 is located in the installation space, and the second drive member 41 can also be protected by the base 5 to reduce the possibility of the second drive member 41 itself being damaged by external environmental factors and affecting the pitch function. It is understandable that in some other possible deformation modes not shown in the accompanying drawings, the second drive member 41 can also be connected to the top seat 52, and the base 51 plays a protective role for the second drive member 41, and the present disclosure is not limited to this. In addition, in an exemplary application scenario, for example, when the above-mentioned drive device is used for an aircraft, the aircraft arm 53 can be connected through the base 5, and then the aircraft can be lifted and moved by the drive device, wherein an interface for docking with the arm 53 can be reserved on the base 5, and the interface can be docked with the arm 53 in any suitable form, such as the form of flange docking, or the form of plug-in, etc., and the present disclosure is not limited to this. In addition, the wire electrically connected to the first drive member 3 and the second drive member 41 can extend from the interface through the reserved space in the arm 53 to the fuselage of the aircraft to realize power supply and signal control of the first drive member 3 and the second drive member 41. In addition, the interface can be set on the base 51, or it can be set on the top seat 52, and the present disclosure is not specifically limited to this.

[0037] It is understandable that the configuration of the first driving member 3 and the second driving member 41 is related to the installation position. Figures 2 to 4, taking the base 51 and the top seat 52 as an example to form an installation space, the second driving member 41 is located in the installation space and connected to the base 51, and the first driving member 3 is located outside the installation space and connected to the top seat 52, at this time, the second driving member 41 is located on the side of the first driving member 3 away from the rotating body 2, thus, the first driving member 3 can have a hollow shaft 31, and the second driving member 41 can include a connected power member 411 and a transmission shaft 412, the transmission shaft 412 passes through the hollow shaft 31 to extend into the closed space 21 and is connected to the actuator 42, and the power member 411 drives the actuator 42 to move through the transmission shaft 412. In this way, the first driving member 3 can drive the rotating body 2 to drive the multiple blades 1 to rotate along the circumferential direction of the rotating body 2 to rotate the propeller, for example, it can be applied to the working process of the lifting and movement of the aircraft. At the same time, the transmission shaft 412 passes through the hollow shaft 31 without contacting the hollow shaft 31. Therefore, the rotation of the hollow shaft 31 will not affect the movement of the transmission shaft 412. Then, the power member 411 can drive the actuator 42 to move through the transmission shaft 412 to drive the blade 1 to rotate around its own axis to change the blade angle. Accordingly, the pitch change process will not affect the normal action of the first driving member 3 driving the rotating body 2 to drive the blade 1 to rotate. At this time, based on the installation positions of the first drive member 3 and the second drive member 41, the first drive member 3 can be constructed as an outer rotor motor, wherein the outer rotor part of the outer rotor motor is connected to the rotating body 2 so as to be able to drive the rotating body 2 to rotate, and a hollow shaft 31 is installed inside. The power member 411 can be constructed as a linear servo, and the transmission shaft 412 is connected to the linear servo and passes through the hollow shaft 31. In this way, the volume of the rotating body 2 can be reduced, and at the same time, the load of the first drive member 3 can be reduced. Of course, in other embodiments, the transmission shaft 412 can also fit in contact with the hollow shaft 31, and the present disclosure is not limited to this.

[0038] In some other possible embodiments not shown in the accompanying drawings, the first drive member 3 can be located outside the closed space 21 and connected to the base 5, and the second drive member 41 can be located inside the closed space 21. At this time, based on the installation positions of the first drive member 3 and the second drive member 41, the first drive member 3 can be constructed as an outer rotor motor, and the second drive member 41 can include a power source such as a linear servo or a linear motor, and a drive shaft connected to the power source, the drive shaft is connected to the actuator 42, and the power source drives the actuator 42 to move through the drive shaft, wherein the outer rotor part of the outer rotor motor is connected to the rotating body 2 so as to be able to drive the rotating body 2 to rotate. In addition, the second drive member 41 can be protected by the rotating body 2 to reduce the possibility of the second drive member 41 itself being damaged by external environmental factors and affecting the pitch function, and the pitch structure is more integrated. Therefore, the installation position and structural form of the first drive member 3 and the second drive member 41 can be adaptively adjusted according to the use requirements, and the present disclosure does not make specific restrictions on this.

[0039] In some embodiments, reference Figures 1 to 4 The actuator 42 may include a sliding member 421 and a connecting rod mechanism 422. The sliding member 421 is limited to the transmission shaft 412 along the central axis. The sliding member 421 is movably connected to the rotating body 2 along the central axis. In this way, the power member 411 can be used to drive the transmission shaft 412 to move back and forth along the central axis to drive the sliding member 421 to move back and forth synchronously. The sliding member 421 is connected to each blade 1 through a connecting rod mechanism 422, so that the movement of the sliding member 421 drives the connecting rod mechanism 422 to rotate the blade 1 around its own axis, thereby meeting the requirement of variable pitch. Among them, a guide groove 22 extending along the central axis may be formed in the rotating body 2, and the side edge of the sliding member 421 may slidably abut against the groove wall of the guide groove 22 to slide along the guide groove 22. In addition, the sliding member 421 is rotatably sleeved on the transmission shaft 412 around the central axis of the transmission shaft 412. At the same time, the central axis of the transmission shaft 412 is the pivot axis of the rotating body 2. In this way, when the first driving member 3 drives the rotating body 2 to rotate to drive the multiple blades 1 to rotate in the circumferential direction, the sliding member 421 and the connecting rod mechanism 422 can also rotate around the central axis of the transmission shaft 412. Therefore, the second driving member 41 drives the actuator 42 to move, that is, the power member 411 drives the transmission shaft 412 to drive the sliding member 421 to move back and forth along the central axis to drive the connecting rod mechanism 422 to move so that the blade 1 rotates around its own axis. The pitch change process does not interfere with the process in which the first driving member 3 drives the rotating body 2 to rotate to drive the multiple blades 1 to rotate in the circumferential direction.

[0040] It can be known from the above description that the sliding member 421 is rotatably sleeved on the transmission shaft 412 around the central axis of the transmission shaft 412 and is limited to the transmission shaft 412 along the central axis. Based on this connection method, in some embodiments, refer to Figures 3 to 5, the second bearing 8 between the transmission shaft 412 and the sliding member 421 can be sleeved on the transmission shaft 412, and a third limiting structure 81 for limiting the inner ring of the second bearing 8 is provided on the transmission shaft 412, and a fourth limiting structure 82 for limiting the outer ring of the second bearing 8 is provided on the sliding member 421. It can be understood that the third limiting structure 81 and the fourth limiting structure 82 can be constructed in any suitable manner, for example, the third limiting structure 81 can include a second protrusion 811 formed on the transmission shaft 412, and a second locking nut 812 threadedly connected to the transmission shaft 412, and the second protrusion 811 and the second locking nut 812 are arranged at intervals on both sides of the second bearing 8 along the central axis direction of the transmission shaft 412 to act on the inner ring of the second bearing 8 in the axial direction. The sliding member 421 may include a moving block 821 and a fixed cover plate 822 connected to the moving block 821, a slider 8211 is formed on the moving block 821 to slidably abut against the groove wall of the guide groove 22, so that the moving block 821 and the fixed cover plate 822 can slide along the guide groove 22, the moving block 821 cooperates with the fixed cover plate 822 to form a fourth limiting structure 82, and an installation space for placing the second bearing 8 is formed between the moving block 821 and the fixed cover plate 822, wherein the fixed cover plate 822 and the moving block 821 are arranged at intervals on both sides of the second bearing 8 along the central axis direction to act on the outer ring of the second bearing 8 in the axial direction, and the connecting The rod mechanism 422 can be connected to the movable block 821 or the fixed cover plate 822, so that the power member 411 can be used to drive the transmission shaft 412 to reciprocate along the central axis, so as to drive the movable block 821 and the fixed cover plate 822 to reciprocate synchronously through the second bearing 8, and then drive the connecting rod mechanism 422 to rotate the blade 1 around its own axis to meet the requirement of variable pitch. At the same time, under the action of the second bearing 8, in the process of the first driving member 3 driving the rotating body 2 to rotate to drive multiple blades 1 to rotate in the circumferential direction, the connecting rod mechanism 422, the movable block 821 and the fixed cover plate 822 can also rotate around the central axis of the transmission shaft 412.

[0041] In some embodiments, reference Figures 2 to 4The connecting rod mechanism 422 may include a hinged first connecting rod 4221 and a second connecting rod 4222, wherein an end of the first connecting rod 4221 away from the second connecting rod 4222 is hinged to the sliding member 421, and an end of the second connecting rod 4222 away from the first connecting rod 4221 is connected to the blade 1. When the pitch needs to be changed, the power part 411 drives the transmission shaft 412 to move along the central axis, and drives the moving block 821 and the fixed cover plate 822 to move synchronously through the second bearing 8. It can be understood that the first connecting rod 4221 can be hinged to any one of the moving block 821 and the fixed cover plate 822, and then the position of the hinge point of the first connecting rod 4221 and the sliding member 421 moves along the central axis of the transmission shaft 412. Since the position of the connection point between the second connecting rod 4222 and the blade 1 will not change, the lengths of the first connecting rod 4221 and the second connecting rod 4222 will not change. Therefore, as the position of the hinge point between the first connecting rod 4221 and the sliding member 421 changes, the position of the hinge point between the first connecting rod 4221 and the second connecting rod 4222 will change, and then the second connecting rod 4222 will rotate accordingly to drive the blade 1 to rotate around its own axis to change the blade angle, thereby completing the pitch change work. It should be noted that the power member 411 may include a linear servo or a linear motor, etc., so that the drive shaft 412 can stop moving and achieve self-locking after the blade 1 rotates to meet the blade angle requirement, so that the position of the hinge point of the first connecting rod 4221 and the sliding member 421 will no longer change and remain stably at this position. Similarly, since the position of the hinge point of the second connecting rod 4222 and the blade 1 will not change, the length of the first connecting rod 4221 and the second connecting rod 4222 will not change, and the second connecting rod 4222 will no longer rotate, so that the blade angle remains stable. Of course, the length of the first connecting rod 4221 and the second connecting rod 4222 will affect the change in the blade angle per unit distance moved by the drive shaft 412. The length of the first connecting rod 4221 and the second connecting rod 4222 and the movement process can be simulated by calculation and motion simulation, and the present disclosure will not elaborate on this.

[0042] In some embodiments, reference Figure 2 and Figure 3A connecting piece 6 corresponding to a plurality of blades 1 is circumferentially arranged on the rotating body 2, and the connecting piece 6 is used to connect the blades 1 so that the blades 1 can rotate circumferentially along the rotating body 2 as the rotating body 2 rotates, wherein the connecting piece 6 has a connecting shaft 61 that penetrates the rotating body 2 and extends into the closed space 21, and the connecting shaft 61 and the blade 1 are coaxial, and the connecting shaft 61 is connected to the connecting rod mechanism 422, specifically, the end of the second connecting rod 4222 away from the first connecting rod 4221 can be connected to the connecting shaft 61, so that the second connecting rod 4222 rotates to drive the connecting shaft 61 to rotate, and then drives the blade 1 to rotate around its own axis through the connecting piece 6 to change the blade angle. It can be understood that the connecting member 6 can be constructed in any suitable manner. For example, the connecting member 6 can include a first fixing member 62 and a second fixing member 63 that are spaced apart on both sides of the blade 1, and the connecting shaft 61 is connected to any one of the first fixing member 62 and the second fixing member 63. Then, the first fixing member 62 and the second fixing member 63 can be fixed by fasteners 64 such as bolts, thereby clamping and fixing the blade 1 by the first fixing member 62 and the second fixing member 63. The present disclosure does not make any specific limitations on this.

[0043] In addition, in order to reduce the wear of the connecting shaft 61 when it rotates during the pitch change process, the first bearing 7 located between the connecting shaft 61 and the rotating body 2 can be sleeved on the connecting shaft 61, and a first limiting structure 71 for limiting the inner ring of the first bearing 7 is provided on the connecting shaft 61, and a second limiting structure 72 for limiting the outer ring of the first bearing 7 is provided on the rotating body 2. It can be understood that the first limiting structure 71 and the second limiting structure 72 can be constructed in any suitable manner, for example, referring to Figure 3 and Figure 6 The first limiting structure 71 may include a first protrusion 711 formed on the connecting shaft 61, and a first locking nut 712 threadedly connected to the connecting shaft 61, the first protrusion 711 and the first locking nut 712 are arranged at intervals on both sides of the first bearing 7 and act on the inner ring of the second bearing 8 in an axial limiting manner. The fourth limiting structure 82 may include a mounting groove 23 formed on the rotating body 2 for mounting the first bearing 7, and a matching piece 721 connected to the rotating body 2, the groove bottom wall of the mounting groove 23 and the matching piece 721 are arranged at intervals on both sides of the second bearing 8 to act on the outer ring of the second bearing 8 in an axial limiting manner, wherein the connecting shaft 61 passes through the groove bottom wall of the mounting groove 23 to be connected to the second connecting rod 4222. Of course, the mounting groove 23 can be formed on the outer wall of the rotating body 2, or in order to ensure the strength of the rotating body 2, a boss can be connected to the outer surface of the rotating body 2, and the mounting groove 23 can be formed on the boss. At this time, the mating piece 721 can be threadedly connected to the inner wall of the mounting groove 23 or the outer wall surface of the boss to limit the second bearing 8. The present disclosure does not make specific limitations on this.

[0044] According to a second aspect of the present disclosure, a propeller is provided, comprising the above-mentioned driving device and a plurality of blades 1. The propeller has all the beneficial effects of the above-mentioned driving device and can be applied to unmanned aerial vehicle equipment such as rotorcraft, which will not be described in detail in the present disclosure.

[0045] According to a third aspect of the present disclosure, an aircraft is provided, comprising the above-mentioned propeller, and the aircraft has all the beneficial effects of the above-mentioned propeller, which are not described in detail in the present disclosure. The aircraft can be any unmanned aerial vehicle equipment such as a rotorcraft that can be equipped with the above-mentioned propeller, and the present disclosure does not specifically limit this.

[0046] The present disclosure exemplarily describes the use process of the driving device.

[0047] First, the base 5 may include a base 51 and a top seat 52, and the base 51 and the top seat 52 enclose an installation space. The second drive member 41 may be located in the installation space and connected to the base 51, and the first drive member 3 may be located outside the installation space and connected to the top seat 52. The first drive member 3 is constructed as an outer rotor motor, wherein the outer rotor part of the outer rotor motor is connected to the rotating body 2 so as to be able to drive the rotating body 2 to rotate, and through the connecting member 6, the blade 1 rotates circumferentially with the rotation of the rotating body 2 so that the propeller rotates, which can be applied to work such as the lifting and movement of an aircraft.

[0048] At the same time, the power member 411 is constructed as a linear servo so as to be able to drive the transmission shaft 412 to move along the central axis, so as to drive the moving block 821 and the fixed cover plate 822 to move synchronously through the second bearing 8, and then the position of the hinge point between the first connecting rod 4221 and the sliding member 421 changes, and the position of the hinge point between the first connecting rod 4221 and the second connecting rod 4222 will change accordingly, and then the second connecting rod 4222 will rotate accordingly to drive the blade 1 to rotate around its own axis to change the blade angle, thereby completing the pitch change process.

[0049] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0050] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0051] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A driving device, It is characterized in that A propeller for an aircraft, the driving device comprising: A rotating body, used to connect a plurality of blades arranged along the circumference of the rotating body, wherein the interior of the rotating body has a closed space; A first driving member, connected to the rotating body, for driving the rotating body to drive the plurality of blades to rotate along the circumference of the rotating body; and The variable pitch mechanism comprises a second driving member and an actuator, wherein the actuator is located in the closed space and connected to the plurality of blades, and the second driving member is used to drive the actuator to drive the blades to rotate around their own axes to change the blade angles.

2. The driving device according to claim 1, It is characterized in that The second driving member and the first driving member are installed on a base, the first driving member has a hollow shaft, the second driving member is located on a side of the first driving member away from the rotating body, the second driving member includes a connected power member and a transmission shaft, the transmission shaft passes through the hollow shaft to extend into the enclosed space and is connected to the actuator, the power member drives the actuator through the transmission shaft to drive the blade to rotate around its own axis.

3. The driving device according to claim 2, It is characterized in that The first driving member is an outer rotor motor.

4. The drive device according to claim 2 or 3, It is characterized in that The base includes a bottom seat and a top seat, the bottom seat and the top seat enclose an installation space, the second driving member is located in the installation space and connected to the bottom seat, and the first driving member is located outside the installation space and connected to the top seat.

5. The driving device according to claim 2, It is characterized in that The actuator includes a sliding member and a connecting rod mechanism. The sliding member is rotatably sleeved on the transmission shaft around the central axis of the transmission shaft and is limited to the transmission shaft along the central axis. The sliding member is movably connected to the rotating body along the central axis. The sliding member and each of the blades are connected through the connecting rod mechanism so that the movement of the sliding member drives the blade to rotate around its own axis. The power member is used to drive the transmission shaft to reciprocate along the central axis to drive the sliding member to reciprocate synchronously.

6. The driving device according to claim 5, It is characterized in that The connecting rod mechanism comprises a hinged first connecting rod and a second connecting rod, wherein one end of the first connecting rod away from the second connecting rod is hinged to the sliding member, and one end of the second connecting rod away from the first connecting rod is connected to the blade.

7. The driving device according to claim 5 or 6, It is characterized in that The rotating body is provided with connecting pieces corresponding to the plurality of blades one by one along the circumferential direction, the connecting pieces are used to connect the blades, the connecting pieces have a connecting shaft that penetrates the rotating body and extends into the closed space, the connecting shaft and the blades are coaxial, and the connecting shaft is connected to the connecting rod mechanism; A first bearing is sleeved between the connecting shaft and the rotating body, a first limiting structure for limiting the inner ring of the first bearing is arranged on the connecting shaft, and a second limiting structure for limiting the outer ring of the first bearing is arranged on the rotating body.

8. The driving device according to claim 5, It is characterized in that A second bearing is sleeved between the transmission shaft and the sliding member, a third limiting structure for limiting the inner ring of the second bearing is arranged on the transmission shaft, and a fourth limiting structure for limiting the outer ring of the second bearing is arranged on the sliding member.

9. A propeller, It is characterized in that It comprises the driving device as described in any one of claims 1 to 8 and the plurality of blades.

10. An aircraft, It is characterized in that Comprising the propeller as claimed in claim 9.

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