Propeller hub structure of electric variable pitch propeller
By using the hub structure of the electric variable pitch propeller, the pitch can be precisely adjusted by utilizing the variable pitch motor and the lead screw and nut system. This solves the problem of unstable pitch function caused by slip ring power supply and improves the working efficiency and control accuracy of the variable pitch propeller.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-27
- Publication Date
- 2026-03-27
AI Technical Summary
The slip ring structure in existing variable pitch propellers is susceptible to environmental influences, leading to poor contact, signal transmission interruption, or reduced power transmission efficiency, which affects the normal operation of the variable pitch function.
The rotor hub structure of the electric variable pitch propeller is fixedly connected to the stator through the drive assembly, and the central part of the rotor hub is fixedly connected to the rotor. The pitch is precisely adjusted by using the variable pitch motor, lead screw and lead screw nut, avoiding slip ring power supply and ensuring the efficient operation of the variable pitch mechanism.
This technology enables the variable pitch mechanism to operate efficiently, saves energy, improves the propeller's working efficiency and control accuracy, and reduces the occurrence of malfunctions.
Smart Images
Figure CN224045419U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a variable pitch propeller technical field especially a kind of propeller hub structure of electric variable pitch propeller. BACKGROUND
[0002] With the rapid development of aircraft technology, more and more fields are applied, and aircraft power source is mostly driven by engine and motor to pull or push fixed pitch propeller, and fixed pitch propeller is only efficient in limited speed range, and the sliding distance is long in take-off stage, and the climbing is slow, and the sliding distance is long in landing stage, and the economy is low, and the existing variable pitch propeller uses slip ring to realize power supply and control of variable pitch motor and power supply side, and in use, slip ring is greatly affected by environment, and is easy to wear in operation, to cause poor contact, signal transmission interruption or electric energy transmission efficiency reduction, to affect the normal operation of variable pitch function, and even cause failure. SUMMARY
[0003] The utility model aims at at least one of the technical problems existing in the related art is solved.For this purpose, the utility model provides a kind of propeller hub structure of electric variable pitch propeller, realizes the accurate adjustment of pitch, and improves the working efficiency of propeller.
[0004] The utility model provides a kind of propeller hub structure of electric variable pitch propeller, including: propeller hub central piece, blade mechanism, end cover, torsion arm mechanism, variable pitch mechanism and power motor;
[0005] The end cover is fixedly connected with the propeller hub central piece;
[0006] The power motor includes stator and rotor, the propeller hub central piece is fixedly connected with the rotor, the blade mechanism includes blade and rocker arm, the root of the blade is in abutment with the end cover and is fixedly connected with the rocker arm;
[0007] The variable pitch mechanism includes moving disc, pull rod assembly, drive assembly and moving piece, the drive assembly is arranged in the inside of the propeller hub central piece and is fixedly connected with the stator, the output end of the drive assembly is connected with one end of the moving piece, the other end of the moving piece is fixedly connected with the moving disc, one end of the pull rod assembly is fixedly connected with the moving disc, the other end of the pull rod assembly is connected with the rocker arm;
[0008] The torsion arm mechanism is connected with the moving disc and the propeller hub central piece.
[0009] According to the propeller hub structure of electric variable pitch propeller provided by the utility model, the torsion arm mechanism includes upper torsion arm and lower torsion arm, one end of the upper torsion arm is connected with the moving disc, one end of the lower torsion arm is hinged with the other end of the upper torsion arm, and the other end of the lower torsion arm is connected with the propeller hub central piece.
[0010] According to the propeller hub structure of the electric variable-pitch propeller provided by the utility model, the driving assembly comprises a variable-pitch motor, a lead screw and a lead screw nut, the variable-pitch motor is arranged inside the propeller hub central part and is fixedly connected with the stator, the output end of the variable-pitch motor is connected with one end of the lead screw, the other end of the lead screw extends out of the top end of the propeller hub central part along the axial direction of the propeller hub central part and is threadedly connected with the lead screw nut, and the lead screw nut is fixedly connected with the moving part.
[0011] According to the propeller hub structure of the electric variable-pitch propeller provided by the utility model, the moving part comprises a sliding block or a sleeve.
[0012] According to the propeller hub structure of the electric variable-pitch propeller provided by the utility model, the propeller hub structure further comprises an anti-twist arm mechanism, the anti-twist arm mechanism comprises an upper twist arm and a lower twist arm, one end of the lower twist arm is fixedly connected with the lead screw nut, the other end of the lower twist arm is hingedly connected with one end of the upper twist arm, and the other end of the upper twist arm is fixedly connected with the sliding block or the sleeve.
[0013] According to the propeller hub structure of the electric variable-pitch propeller provided by the utility model, the driving assembly comprises a variable-pitch rudder mechanism, the variable-pitch rudder mechanism is arranged inside the propeller hub central part, and the output end of the variable-pitch rudder mechanism is fixedly connected with the moving part.
[0014] According to the propeller hub structure of the electric variable-pitch propeller provided by the utility model, a plurality of arm holes are uniformly arranged on the outer side wall of the propeller hub central part, and the propeller blades are rotationally matched with the arm holes.
[0015] According to the propeller hub structure of the electric variable-pitch propeller provided by the utility model, the propeller blade mechanism further comprises a first combined bearing, a second combined bearing, a bearing spacer sleeve, a pressing sleeve and a pressing nut, the arm hole is sleeved on the root of the propeller blade, the pressing nut, the pressing sleeve, the first combined bearing, the bearing spacer sleeve and the second combined bearing are sequentially arranged from inside to outside in the gap between the arm hole and the root of the propeller blade and are all sleeved on the root of the propeller blade, the pressing nut is threadedly connected with the root of the propeller blade, the inner ring of the second combined bearing is in abutment with the shaft shoulder of the root of the propeller blade, and the outer ring of the second combined bearing is in abutment with the boss inside the arm hole.
[0016] According to the propeller hub structure of the electric variable-pitch propeller provided by the utility model, the first combined bearing comprises a needle roller angular contact combined bearing, and the second combined bearing comprises a needle roller thrust combined bearing.
[0017] According to the propeller hub structure of the electric variable-pitch propeller provided by the utility model, a rotary bearing is arranged between the moving disc and the moving part.
[0018] The one or more technical solutions in the embodiment of the utility model have at least one of the following technical effects:
[0019] According to the propeller hub structure of the electric variable-pitch propeller, the driving assembly is fixedly connected with the stator, and the propeller hub central part is fixedly connected with the rotor, so that the structure for power supply by the slip ring in the prior art is solved, only the propeller hub central part needs to rotate in the rotating process, the driving assembly is relatively static with the fuselage, so that the working efficiency of the variable-pitch mechanism is ensured, and energy is saved.
[0020] The additional aspects and advantages of the utility model will be partially given in the following description, partially will become obvious from the following description, or will be understood through the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS
[0021] In order to more clearly illustrate the technical scheme in the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, obviously, the drawings in the following description are some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creating labor.
[0022] Figure 1 It is one of the structure schematic diagram of the propeller hub structure of the electric variable-pitch propeller provided by the utility model.
[0023] Figure 2 It is the second structure schematic diagram of the propeller hub structure of the electric variable-pitch propeller provided by the utility model.
[0024] Figure 3 It is the third structure schematic diagram of the propeller hub structure of the electric variable-pitch propeller provided by the utility model.
[0025] Figure 4 It is the explosion view of the variable-pitch mechanism of the propeller hub structure of the electric variable-pitch propeller provided by the utility model.
[0026] Reference signs:
[0027] 1, propeller hub central part;2, propeller mechanism;21, propeller blade;22, rocker arm;23, first combined bearing;24, second combined bearing;25, bearing spacer sleeve;26, compression sleeve;27, compression nut;3, end cover;4, torsion arm mechanism;41, upper torsion arm;42, lower torsion arm;5, variable-pitch mechanism;51, moving disc;52, pull rod assembly;53, driving assembly;531, variable-pitch motor;532, lead screw;533, lead screw nut;54, moving part;55, rotary bearing;56, bearing inner ring pressing plate;57, bearing outer ring pressing plate;58, compression bolt;6, anti-torsion arm mechanism. DETAILED DESCRIPTION
[0028] In order to make the purpose, technical scheme and advantages of the utility model clearer, the technical scheme in the utility model will be clearly and completely described below. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model. The following embodiments are used to illustrate the utility model, but cannot be used to limit the scope of the utility model.
[0029] In the description of the embodiments of the utility model, it should be explained that the orientation or position relationship indicated by the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is the orientation or position relationship shown in the drawings, which is only for the convenience of describing the embodiments of the utility model and simplifying the description, and cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the embodiments of the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.
[0030] In the description of the embodiments of the utility model, it should be explained that, unless otherwise explicitly specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the embodiments of the utility model can be understood according to the specific circumstances.
[0031] In the embodiments of the utility model, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be that the first feature is directly above or obliquely above the second feature, or it only means that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be that the first feature is directly below or obliquely below the second feature, or it only means that the horizontal height of the first feature is less than that of the second feature.
[0032] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the utility model. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any suitable manner in any one or more embodiments or examples. In addition, the skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of the different embodiments or examples without contradiction.
[0033] Figure 1 is one of the structure schematic diagram of the hub structure of the electric variable pitch propeller provided by the utility model. Figure 2 is the second structure schematic diagram of the hub structure of the electric variable pitch propeller provided by the utility model. Figure 3 is the third structure schematic diagram of the hub structure of the electric variable pitch propeller provided by the utility model. Figure 4 is the explosion view of the variable pitch mechanism of the hub structure of the electric variable pitch propeller provided by the utility model.
[0034] The utility model provides a kind of hub structure of electric variable pitch propeller, as shown in Figures 1 to 4 The hub structure of electric variable pitch propeller includes: hub central piece 1, blade mechanism 2, end cover 3, torsion arm mechanism 4, variable pitch mechanism 5 and power motor;
[0035] The end cover 3 is fixedly connected with the hub central piece 1;
[0036] The power motor includes stator and rotor, the hub central piece 1 is fixedly connected with the rotor, the blade mechanism 2 includes blade 21 and rocker arm 22, the root of the blade 21 is abutted with the end cover 3 and is fixedly connected with the rocker arm 22;
[0037] The variable pitch mechanism 5 includes dynamic disc 51, pull rod assembly 52, drive assembly 53 and moving piece 54, the drive assembly 53 is arranged in the inside of the hub central piece 1 and is fixedly connected with the stator, the output end of the drive assembly 53 is connected with one end of the moving piece 54, the other end of the moving piece 54 is fixedly connected with the dynamic disc 51, one end of the pull rod assembly 52 is fixedly connected with the dynamic disc 51, the other end of the pull rod assembly 52 is connected with the rocker arm 22;
[0038] The torsion arm mechanism 4 is connected the dynamic disc 51 and the hub central piece 1.
[0039] In the embodiment, by setting the driving assembly 53 in fixed connection with the stator and the hub central member 1 in fixed connection with the rotor, the structure of power supply by the slip ring in the prior art is solved, only the hub central member 1 rotates in the rotating process, the driving assembly 53 is relatively static with the fuselage, so that the working efficiency of the pitch changing mechanism 5 is ensured, and energy is saved.
[0040] According to some embodiments of the utility model, in the flying process of the aircraft, the power motor drives the rotor to rotate, the hub central member 1 drives the blade mechanism 2 to rotate with the rotor, when the pitch needs to be changed, the driving assembly 53 drives the moving piece 54 to move axially and then drives the movable disc 51 to move up and down, the movable disc 51 is connected with the blade 21 through the pull rod, the movable disc 51 moves up and down to drive the blade 21 to swing, and then the pitch is adjusted.
[0041] According to some embodiments of the utility model, the torsion arm mechanism 4 is arranged to connect the movable disc 51 and the hub central member 1, so that the relative rotation between the movable disc 51 and the hub central member 1 is avoided.
[0042] According to some embodiments of the utility model, the movable disc 51 is evenly distributed with a plurality of torsion arm mechanisms 4.
[0043] According to some embodiments of the utility model, the moving piece 54 comprises one of a sliding block, a sleeve and an output rod.
[0044] According to the hub structure of the electric variable-pitch propeller provided by the utility model, Figures 1 to 4 As shown, the torsion arm mechanism 4 comprises an upper torsion arm 41 and a lower torsion arm 42, one end of the upper torsion arm 41 is connected with the movable disc 51, the other end of the upper torsion arm 41 is hingedly connected with one end of the lower torsion arm 42, and the other end of the lower torsion arm 42 is connected with the hub central member 1.
[0045] In the embodiment, by setting the upper torsion arm 41 and the lower torsion arm 42, the axial relative movement between the movable disc 51 and the hub central member 1 is realized on the basis that the relative rotation between the movable disc 51 and the hub central member 1 is avoided.
[0046] According to some embodiments of the utility model, a hinge shaft is arranged between the upper torsion arm 41 and the lower torsion arm 42.
[0047] According to some embodiments of the utility model, the moving piece 54 drives the movable disc 51 to move up and down, only the relative rotation between the hub central member 1 and the fuselage occurs, no axial movement occurs, and the upper torsion arm 41 and the lower torsion arm 42 rotate along the hinge shaft in the movement process of the movable disc 51.
[0048] According to the hub structure of the electric variable-pitch propeller provided by the utility model, Figures 2 to 4As shown, the driving assembly 53 comprises a variable pitch motor 531, a lead screw 532 and a lead screw nut 533, the variable pitch motor 531 is arranged inside the hub central part 1 and fixedly connected with the stator, the output end of the variable pitch motor 531 is connected with one end of the lead screw 532, the other end of the lead screw 532 extends out of the top end of the hub central part 1 along the axial direction of the hub central part 1 and is threadedly connected with the lead screw nut 533, and the lead screw nut 533 is fixedly connected with the moving part 54.
[0049] In the embodiment, the rotation is converted into linear motion through the cooperation of the lead screw 532 and the lead screw nut 533.
[0050] According to some embodiments of the utility model, the variable pitch motor 531 and the lead screw 532 are connected through a shaft coupling.
[0051] According to some embodiments of the utility model, the variable pitch motor 531 drives the rotation of the lead screw 532, the lead screw nut 533 moves up and down along the lead screw 532, and the moving part 54 is further driven to move up and down.
[0052] According to a hub structure of an electric variable pitch propeller provided by the utility model, the moving part 54 comprises a sliding block or a sleeve.
[0053] According to a hub structure of an electric variable pitch propeller provided by the utility model, as Figure 3 As shown, the hub structure of the electric variable pitch propeller further comprises an anti-twist arm mechanism 6, the anti-twist arm mechanism 6 comprises an upper twist arm and a lower twist arm, one end of the lower twist arm is fixedly connected with the lead screw nut 533, the other end of the lower twist arm is hingedly connected with one end of the upper twist arm, and the other end of the upper twist arm is fixedly connected with the sliding block or the sleeve.
[0054] In the embodiment, the upper twist arm and the lower twist arm are hingedly connected, so that the sliding block or the sleeve is prevented from rotating with the lead screw 532, and the relative movement between the lead screw 532 and the moving part 54 is ensured.
[0055] According to a hub structure of an electric variable pitch propeller provided by the utility model, the driving assembly 53 comprises a variable pitch rudder mechanism, the variable pitch rudder mechanism is arranged inside the hub central part 1, and the output end of the variable pitch rudder mechanism is fixedly connected with the moving part 54.
[0056] According to some embodiments of the utility model, the bottom end of the variable pitch rudder mechanism is provided with a brake, so as to ensure the control accuracy of the variable pitch of the blade 21.
[0057] According to some embodiments of the utility model, the moving part 54 adopts an output rod, the variable pitch rudder mechanism directly drives the output rod to move up and down, and the moving disc 51 is further driven to move.
[0058] According to the propeller hub structure of the electric variable-pitch propeller provided by the utility model, the outer side wall of the propeller hub central part 1 is uniformly provided with a plurality of arm holes, and the propeller blade 21 is rotationally matched with the arm hole.
[0059] According to the propeller hub structure of the electric variable-pitch propeller provided by the utility model, the outer side wall of the propeller hub central part 1 is uniformly provided with a plurality of arm holes, and the propeller blade 21 is rotationally matched with the arm hole. Figures 1 to 3 As shown in the figure, the propeller blade mechanism 2 further comprises a first combined bearing 23, a second combined bearing 24, a bearing spacer sleeve 25, a pressing sleeve 26 and a pressing nut 27, the arm hole is sleeved at the root of the propeller blade 21, the pressing nut 27, the pressing sleeve 26, the first combined bearing 23, the bearing spacer sleeve 25 and the second combined bearing 24 are sequentially arranged from inside to outside in the gap between the arm hole and the root of the propeller blade 21 and are all sleeved at the root of the propeller blade 21, the pressing nut 27 is threadedly connected with the root of the propeller blade 21, the inner ring of the second combined bearing 24 abuts against the shaft shoulder of the root of the propeller blade 21, and the outer ring of the second combined bearing 24 abuts against the arm hole.
[0060] In the embodiment, the first combined bearing 23 and the second combined bearing 24 are matched to improve the load bearing capacity of the propeller, facilitate the stability of the propeller in operation, and compactly arrange the root structure of the propeller blade 21, so that the weight can be effectively reduced.
[0061] According to some embodiments of the utility model, the arm hole of the propeller hub central part 1 and the two ends of the root of the propeller blade 21 are designed with sealing rings, and the O-shaped ring is arranged between the end cover 3 and the propeller hub central part 1, so that the external medium is prevented from entering to affect the rotation of the first combined bearing 23 and the second combined bearing 24, the leakage of lubricating grease is also prevented, the supplement frequency of the lubricating grease is reduced, the energy is saved, and the maintainability of the product is improved.
[0062] According to the propeller hub structure of the electric variable-pitch propeller provided by the utility model, the first combined bearing 23 comprises a needle roller angular contact combined bearing, and the second combined bearing 24 comprises a needle roller thrust combined bearing.
[0063] According to some embodiments of the utility model, the needle roller thrust combined bearing and the needle roller angular contact combined bearing are matched to bear the axial load, the radial load and the bending moment.
[0064] According to the propeller hub structure of the electric variable-pitch propeller provided by the utility model, the outer side wall of the propeller hub central part 1 is uniformly provided with a plurality of arm holes, and the propeller blade 21 is rotationally matched with the arm hole. Figures 1 to 4 As shown in the figure, the moving disc 51 and the moving part 54 are provided with a rotary bearing 55.
[0065] According to some preferred embodiments of the utility model, the rotary bearing 55 comprises a spherical roller bearing.
[0066] According to some embodiments of the utility model, the variable distance mechanism 5 further includes a bearing inner ring pressing plate 56, a bearing outer ring pressing plate 57 and a pressing bolt 58, the inner ring of the rotating bearing 55 is sleeved on the moving piece 54, the rotating bearing 55 is fixedly connected with the moving piece 54 through the bearing inner ring pressing plate 56, the movable disc 51 is sleeved on the outer ring of the rotating bearing 55, the rotating bearing 55 is fixedly connected with the movable disc 51 through the bearing outer ring pressing plate 57, the bearing inner ring pressing plate 56 and the bearing outer ring pressing plate 57 are fixed through the pressing bolt 58 respectively, the outer side wall of the moving piece 54 is provided with a moving boss, and the moving boss is in abutment with the lower end of the rotating bearing 55.
[0067] The technical scheme of the utility model will be further explained in combination with a specific embodiment, and it should be noted that the specific embodiment is only for the convenience of the person skilled in the art to better understand the technical scheme of the utility model, and should not be regarded as an unreasonable limitation on the protection scope of the utility model.
[0068] Embodiment one
[0069] After receiving the instruction, the variable distance motor drives the lead screw to rotate, further drives the lead screw nut, and the lead screw nut drives the moving piece to move up and down, and in the process of the movable disc moving up and down along the lead screw, the rocker arm is connected with the movable disc through the pull rod assembly, the rocker arm and the root of the paddle are fixedly connected, and then the linear motion of the movable disc and the connecting rod assembly is converted into the rotation of the paddle assembly around the support arm hole, the paddle angle changes in the process of rotation, and then the pitch is adjusted.
[0070] Finally, it should be noted that: the above embodiments are only used to illustrate the technical scheme of the utility model, and not to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical scheme recorded in the foregoing embodiments, or make equivalent replacement to part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical scheme deviate from the spirit and scope of the technical scheme of the embodiments of the utility model.
Claims
1. A hub structure for an electric variable-pitch propeller, characterized in that, The utility model relates to a propeller mechanism, including: The hub central part, paddle mechanism, end cover, torsion arm mechanism, variable pitch mechanism and power motor are fixedly connected with each other. The power motor includes a stator and a rotor, the hub central part is fixedly connected with the rotor, the paddle mechanism includes a paddle and a rocker arm, the root of the paddle is in abutment with the end cover and is fixedly connected with the rocker arm. The variable pitch mechanism includes a moving disc, a pull rod assembly, a driving assembly and a moving piece, the driving assembly is arranged in the interior of the hub central part and is fixedly connected with the stator, the output end of the driving assembly is connected with one end of the moving piece, the other end of the moving piece is fixedly connected with the moving disc, one end of the pull rod assembly is fixedly connected with the moving disc, the other end of the pull rod assembly is connected with the rocker arm. The torsion arm mechanism is connected with the moving disc and the hub central part. The torsion arm mechanism includes an upper torsion arm and a lower torsion arm, one end of the upper torsion arm is connected with the moving disc, one end of the lower torsion arm is hinged with the other end of the upper torsion arm, the other end of the lower torsion arm is connected with the hub central part.
2. The hub structure of an electric variable-pitch propeller according to claim 1, characterized by The driving assembly includes a variable pitch motor, a lead screw and a lead screw nut, the variable pitch motor is arranged in the interior of the hub central part and is fixedly connected with the stator, the output end of the variable pitch motor is connected with one end of the lead screw, the other end of the lead screw extends out of the top end of the hub central part along the axial direction of the hub central part and is threadedly connected with the lead screw nut, the lead screw nut is fixedly connected with the moving piece.
3. The electric variable-pitch propeller hub structure according to claim 1, characterized by The moving piece includes a sliding block or a sleeve.
4. The electric variable-pitch propeller hub structure according to claim 3, characterized by The utility model also includes an anti-torsion arm mechanism, the anti-torsion arm mechanism includes an upper torsion arm and a lower torsion arm, one end of the lower torsion arm is fixedly connected with the lead screw nut, the other end of the lower torsion arm is hinged with one end of the upper torsion arm, the other end of the upper torsion arm is fixedly connected with the sliding block or the sleeve.
5. The electric variable-pitch propeller hub structure according to claim 4, characterized by The driving assembly includes a variable pitch steering engine, the variable pitch steering engine is arranged in the interior of the hub central part and is fixedly connected with the stator, the output end of the variable pitch steering engine is fixedly connected with the moving piece.
6. The electric variable-pitch propeller hub structure according to claim 1, characterized by Multiple support arm holes are uniformly arranged on the outer side wall of the hub central part, the paddle is rotationally matched with the support arm holes.
7. The electric variable-pitch propeller hub structure according to claim 1, characterized by The paddle mechanism also includes a first combined bearing, a second combined bearing, a bearing spacer sleeve, a compression sleeve and a compression nut, the support arm hole is sleeved on the root of the paddle, the compression nut, the compression sleeve, the first combined bearing, the bearing spacer sleeve and the second combined bearing are sequentially arranged from inside to outside in the gap between the support arm hole and the root of the paddle and are all sleeved on the root of the paddle, the compression nut is threadedly connected with the root of the paddle, the inner ring of the second combined bearing is in abutment with the shaft shoulder of the root of the paddle, and the outer ring of the second combined bearing is in abutment with the boss inside the support arm hole.
8. The electric variable-pitch propeller hub structure according to claim 7, characterized by The first combined bearing includes a needle roller angular contact combined bearing, and the second combined bearing includes a needle roller thrust combined bearing.
9. The electric variable-pitch propeller hub structure according to claim 8, wherein A rotary bearing is arranged between the moving disc and the moving piece.
10. The electric variable-pitch propeller hub structure according to claim 8, wherein