CN117734936A - Universal hinge type propeller hub structure with propeller hub elastic support and working method thereof - Google Patents
Universal hinge type propeller hub structure with propeller hub elastic support and working method thereof Download PDFInfo
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- CN117734936A CN117734936A CN202410092437.6A CN202410092437A CN117734936A CN 117734936 A CN117734936 A CN 117734936A CN 202410092437 A CN202410092437 A CN 202410092437A CN 117734936 A CN117734936 A CN 117734936A
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- 238000000034 method Methods 0.000 title claims abstract description 14
- 229910000831 Steel Inorganic materials 0.000 claims description 15
- 239000010959 steel Substances 0.000 claims description 15
- 229920001971 elastomer Polymers 0.000 claims description 13
- 239000000806 elastomer Substances 0.000 claims description 11
- 230000009471 action Effects 0.000 claims description 4
- 230000000737 periodic effect Effects 0.000 claims description 2
- 125000006850 spacer group Chemical group 0.000 claims description 2
- 238000013461 design Methods 0.000 abstract description 3
- 230000007547 defect Effects 0.000 abstract description 2
- 230000006872 improvement Effects 0.000 description 6
- 238000011161 development Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 241000239290 Araneae Species 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Abstract
The invention belongs to the technical field of helicopter structural design, and discloses a universal hinged hub structure with a hub elastic support and a working method thereof; wherein, universal hinge formula oar hub structure includes: the constant-speed universal hinged propeller hub of the ball cage, the elastic support of the propeller hub, the pitch-changing assembly and the connecting bracket; the constant-speed universal hinged propeller hub of the ball cage is used for being connected with a rotor shaft of the helicopter; the pitch-changing assembly is arranged on the constant-speed universal hinged hub of the ball cage and is used for being connected with the blades of the helicopter; the propeller hub elastic support is arranged on the constant-speed universal hinged propeller hub of the ball cage, and is provided with a connecting bracket which is used for being connected with a rotor shaft of the helicopter; the elastic support of the propeller hub is used for supporting the constant-speed universal hinged propeller hub of the ball cage and providing an operating moment for the helicopter. The technical scheme of the invention discloses a constant-speed universal hinged propeller hub structure with a propeller hub elastic support and a ball cage, which can overcome the technical defect that the traditional constant-speed universal hinged propeller hub is difficult to provide operation torque.
Description
Technical Field
The invention belongs to the technical field of helicopter structural design, and particularly relates to a universal hinged hub structure with a hub elastic support and a working method thereof.
Background
The constant-speed universal hinged propeller hub structure can weaken the aeroelastic coupling of a rotor wing, a nacelle and a wing, improve the aeroelastic stability, avoid the problems of ground resonance and air resonance of a helicopter mode, and is suitable for being applied to small and medium helicopters or tiltrotors.
In the prior art, the constant-speed universal hinged hub fully releases the degree of freedom of the hub in the dumping direction, the operation moment of the hub can be almost zero, and the hub inclination is difficult to be controlled rapidly and accurately; further illustratively, a helicopter employing a constant velocity universal hub will substantially lose operational efficiency, adversely affecting overall helicopter maneuvering performance. In addition, tiltrotors (illustratively, tiltrotors are one type of helicopter) require a hub tipping direction moment to be applied to the hub during tilting to effect a helicopter mode to fixed wing flight mode transition, and the above-described prior art drawbacks limit the use of constant velocity universal hinges in tiltrotors.
Disclosure of Invention
The present invention is directed to a universal hinged hub structure with a hub elastic support and a working method thereof, so as to solve one or more of the above-mentioned technical problems. The technical scheme provided by the invention is particularly a constant-speed universal hinged propeller hub structure of a ball cage with a propeller hub elastic support, and can overcome the technical defect that the traditional constant-speed universal hinged propeller hub is difficult to provide operation torque.
In order to achieve the above purpose, the invention adopts the following technical scheme:
in a first aspect of the present invention, there is provided a universal hinged hub structure comprising a hub elastic support, comprising: the constant-speed universal hinged propeller hub of the ball cage, the elastic support of the propeller hub, the pitch-changing assembly and the connecting bracket; wherein,
the constant-speed universal hinged propeller hub of the ball cage is used for being connected with a rotor shaft of the helicopter;
the pitch-changing assembly is arranged on the constant-speed universal hinged hub of the ball cage and is used for being connected with the blades of the helicopter;
the propeller hub elastic support is arranged on the constant-speed universal hinged propeller hub of the rzeppa, the propeller hub elastic support is provided with the connecting bracket, and the connecting bracket is used for being connected with a rotor shaft of the helicopter; the elastic support of the hub is used for supporting the constant-speed universal hinged hub of the ball cage and providing an operating moment for the helicopter.
A further improvement of the present invention is that the birfield constant velocity universal joint hub comprises: the device comprises a star sleeve, a retainer, steel balls and a three-fork piece; wherein,
the star cover is used for being connected with a rotor shaft of the helicopter;
the three fork members are used for being connected with the variable-pitch assembly;
the three-fork piece is provided with a raceway, the steel balls are respectively contacted with the star cover and the raceway of the three-fork piece, and the retainer is used for keeping the positions of the steel balls; the steel balls are used for transmitting torque from the star sleeve to the three fork pieces; the three fork members can incline around the star cover, so that the helicopter blades realize periodic pitch variation.
A further development of the invention consists in that the star is intended to be connected to the rotor shaft of a helicopter, in particular by means of splines.
A further improvement of the present invention is that the hub elastic support comprises: a lower gasket, an elastomer and an upper connecting piece; wherein,
the elastic body is fixedly arranged between the lower gasket and the upper connecting piece, the lower gasket is used for being connected with the constant-speed universal hinge type propeller hub of the ball cage, and the upper connecting piece is used for being connected with the connecting bracket; wherein the elastomer compresses to provide an operating torque when the birfield constant velocity universal joint hub is tilted.
A further improvement of the present invention is that the lower gasket, the elastomer and the upper connecting piece are vulcanized integrally.
A further improvement of the present invention is that the elastomer is a rubber elastomer.
The invention is further improved in that the pitch changing assembly comprises two deep groove ball bearings, a thrust ball bearing and a pitch changing housing; wherein,
the deep groove ball bearing and the thrust ball bearing are used for supporting the variable-pitch shell on the three-fork piece, and the variable-pitch assembly can rotate around the extending shaft of the three-fork piece;
the variable-pitch housing is adapted to be connected to a blade.
A further improvement of the invention is that the helicopter is a tiltrotor aircraft.
According to a second aspect of the present invention, there is provided a method for operating a universal hinged hub structure having a hub elastic support according to the first aspect of the present invention, comprising:
the constant-speed universal hinged propeller hub of the ball cage is connected with a rotor shaft of the helicopter; the pitch-changing assembly is arranged on the constant-speed universal hinged hub of the ball cage and is connected with the blades of the helicopter; the propeller hub elastic support is arranged on the constant-speed universal hinged propeller hub of the rzeppa, the propeller hub elastic support is provided with the connecting bracket, and the connecting bracket is connected with a rotor shaft of the helicopter;
when the helicopter is maneuvered, the constant-speed universal hinged propeller hubs of the ball cages incline under the action of external force, elastic moment is generated by elastic supporting and compressing of the propeller hubs, operating moment is provided, the inclination of the propeller disc is restrained, the constant-speed universal hinged propeller hubs of the ball cages are driven to move along the helicopter, and the helicopter moves according to a preset track.
A further improvement of the invention is that the helicopter maneuvers in the form of one of a helicopter turning, flying forward or tilting.
Compared with the prior art, the invention has the following beneficial effects:
aiming at the problem that the conventional constant-speed universal hinged type propeller hub is difficult to apply an operation moment to the propeller hub, the invention provides a universal hinged type propeller hub structure with a propeller hub elastic support, which is characterized in that the propeller hub elastic support is added on a ball cage type constant-speed universal propeller hub, and the elastic deformation of the propeller hub elastic support when the propeller hub tilts is utilized to provide a reverse supporting force, so that the operation moment can be effectively provided for the propeller hub; the problem that the traditional constant-speed universal hinged hub is difficult to provide operation torque can be solved, the operation efficacy of a universal hinged hub helicopter can be improved, the universal hinged hub helicopter can be applied to a tiltrotor aircraft, and an effective method is provided for the development of novel tiltrotor aircraft in China.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following description of the embodiments or the drawings used in the description of the prior art will make a brief description; it will be apparent to those of ordinary skill in the art that the drawings in the following description are of some embodiments of the invention and that other drawings may be derived from them without undue effort.
FIG. 1 is a schematic view of a structure of a gimbaled hub with a resilient support for the hub in accordance with an embodiment of the present invention;
FIG. 2 is a schematic view showing the assembly of a gimbaled hub structure with a resilient support for the hub in accordance with an embodiment of the present invention;
the reference numerals in the drawings illustrate:
1. constant-speed universal hinged propeller hub of the ball cage; 11. a star cover; 12. a retainer; 13. a steel ball; 14. a three-fork member;
2. the paddle hub is elastically supported; 21. a lower gasket; 22. an elastomer; 23. an upper connecting sheet;
3. a pitch varying assembly; 31. deep groove ball bearings; 32. a thrust ball bearing; 33. a variable-pitch housing;
4. a connecting bracket; 5. a rotor shaft; 6. a blade.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The invention is described in further detail below with reference to the attached drawing figures:
referring to fig. 1 and 2, an embodiment of the present invention provides a universal hinged hub structure with a hub elastic support, in particular to a constant-velocity universal hinged hub structure with a ball cage with a hub elastic support for a helicopter, comprising: the constant-speed universal hinged propeller hub of the ball cage 1, a propeller hub elastic support 2, a variable-pitch assembly 3 and a connecting bracket 4; wherein,
the constant-speed universal hinged propeller hub 1 is used for being connected with a rotor shaft 5;
the pitch-changing assembly 3 is arranged on the constant-speed universal hinged hub 1 of the ball cage and is used for being connected with the blade 6; illustratively, the constant velocity universal joint hub 1 is used for supporting the blades 6, and transmitting the torque of the rotor shaft 5 to the blades 6 to drive the blades 6 to rotate;
the hub elastic support 2 is mounted on the rzeppa constant velocity universal hinged hub 1 (specifically, illustratively, can be mounted by a screw connection mode), and the hub elastic support 2 is used for being connected with a rotor shaft 5 through the connecting bracket 4 (specifically, illustratively, can be connected by a bolt mode); illustratively, the hub elastic support 2 is used for supporting the constant velocity universal joint hub 1 of the ball cage and providing an operating torque for the helicopter so as to improve the operability of the helicopter.
The embodiment of the invention is specifically explained, the hub elastic support 2 is connected with the connecting bracket 4, and the connecting bracket 4 is used for being connected with the rotor shaft 5; the hub elastic support 2 provides axial support and positioning for the birfield constant velocity universal hinged hub 1, and provides an operating moment when the birfield constant velocity universal hinged hub 1 is tilted. In addition, the pitch-changing assembly 3 is arranged on the constant-speed universal hinge type propeller hub 1 of the ball cage, the blade 6 is arranged on the pitch-changing assembly 3, and the helicopter driving device sequentially transmits power to the blade 6 through the rotor shaft 5, the constant-speed universal hinge type propeller hub 1 of the ball cage and the pitch-changing assembly 3 to drive the blade 6 to rotate so as to provide lifting force for the helicopter.
In a further preferred embodiment of the present invention, the constant velocity universal joint hub 1 comprises: a star cover 11, a retainer 12, steel balls 13 and a three-fork piece 14; wherein, the steel balls 13 are respectively contacted with the raceways of the star cover 11 and the three-fork piece 14, the star cover 11 transmits torque to the three-fork piece 14 through the steel balls 13, and the retainer 12 is used for keeping the positions of the steel balls 13 and preventing the steel balls 13 from sliding out of the raceways of the star cover 11 and the three-fork piece 14. Further illustratively, spider 11 is configured to couple to rotor shaft 5 to transfer torque from rotor shaft 5; the three fork members 14 are used for being connected with the variable-pitch assembly 3 and transmitting the torque transmitted from the steel balls 13 to the variable-pitch assembly 3; the three fork 14 can tilt around the star 11, allowing the helicopter blades 6 to perform a cyclic function. Further specifically by way of example, spider 11 may be splined to rotor shaft 5 to transmit torque from rotor shaft 5.
In a further preferred technical solution of the embodiment of the invention, the elastic support 2 of the hub comprises a lower gasket 21, an elastomer 22 and an upper connecting piece 23; the elastic body 22 is located between the lower gasket 21 and the upper connecting piece 23, and after the lower gasket 21, the elastic body 22 and the upper connecting piece 23 are assembled, the lower gasket, the elastic body and the upper connecting piece 23 are put into a die to be vulcanized and integrally formed to form the elastic support 2 of the hub; the lower spacer 21 may be connected to the rzeppa constant velocity universal hub 1 by means of screws, and the upper connecting piece 23 may be connected to the connecting bracket 4 by means of screws, the connecting bracket 4 being adapted to be connected to the rotor shaft 5. By adopting the connecting mode of the embodiment of the invention, the flexible support of the constant-speed universal hinged propeller hub 1 of the rzeppa is realized by the elastic support 2 of the propeller hub, and when the constant-speed universal hinged propeller hub 1 of the rzeppa inclines, the elastic body 22 is compressed to provide an operation moment and improve the operation performance of the helicopter. Further illustratively, the elastic body 22 is difficult to be directly connected with the hub and the rotor shaft due to strong flexibility, and by adopting the connecting scheme of the embodiment of the invention, the structures of the lower gasket 21 and the upper connecting sheet 23 can be flexibly adjusted according to the structure of the universal hub to be connected with the hub, so that the structure of the elastic body is not changed, and the flexibility and the adaptability are high; in addition, the elasticity of the elastic body can be flexibly adjusted according to the actual control moment requirement of the helicopter, and the helicopter is suitable for different helicopter operation conditions. In summary, in the embodiment of the invention, the elastic body has simple structure, simple and easy elastic adjustment, stable and reliable connection structure and strong applicability, and is beneficial to popularization and application.
Further specifically explaining, the lower gasket 21 is connected with the constant-speed universal hinged propeller hub 1 of the ball cage, the upper connecting piece 23 is connected with the rotor shaft 5 through the connecting bracket 4, and the elastic support 2 of the propeller hub realizes the support of the constant-speed universal hinged propeller hub 1 of the ball cage; when the helicopter is maneuvered (for example, the helicopter turns, flies forwards or tilts, etc.), the constant-speed universal hinged propeller hub 1 of the ball cage tilts under the action of external force due to the release state of the tilting degree of the propeller disc of the constant-speed universal hinged propeller hub 1 of the ball cage, the elastic body 22 compresses to generate elastic moment, provides operation moment, inhibits the tilting of the propeller disc, promotes the constant-speed universal hinged propeller hub 1 of the ball cage to follow the movement of the helicopter, ensures the movement of the helicopter according to a preset track, improves the operation performance of the helicopter and ensures the flying quality of the helicopter. If the helicopter is not provided with a hub elastic support, the operation control of the hub is lost when the helicopter is maneuvered, and the helicopter is at risk of out of control. Therefore, the technical scheme of the embodiment of the invention can effectively improve the flight quality of the helicopter.
In a further preferred embodiment of the present invention, the pitch assembly 3 includes two deep groove ball bearings 31, a thrust ball bearing 32 and a pitch housing 33; the deep groove ball bearing 31 and the thrust ball bearing 32 support the pitch-changing housing 33 on the three-fork piece 14, axial positioning of the deep groove ball bearing 31 and the thrust ball bearing 32 is completed by using round nuts and shaft shoulders, and by means of the structure, the pitch-changing assembly 3 can rotate around the extending shaft of the three-fork piece 14, so that the pitch-changing function of the blade 6 is realized; the pitch-changing housing 33 is connected with the blade 6 to realize the support of the blade 6, and transmits the torque of the constant-speed universal hinged hub 1 of the ball cage to the blade 6 to realize the pitch-changing and rotation functions of the blade 6 around the rotor shaft 5.
The invention discloses a constant-speed universal hinged propeller hub structure of a rzeppa, which comprises a constant-speed universal hinged propeller hub of the rzeppa, a propeller hub elastic support, a pitch-changing assembly, a rotor shaft and a connecting bracket; the pitch-changing assembly is arranged on the constant-speed universal hinged propeller hub of the ball cage, the propeller blade is connected with the pitch-changing assembly, and the constant-speed universal hinged propeller hub of the ball cage is used for supporting the propeller blade, transmitting torque of the rotor shaft to the propeller blade and driving the propeller blade to rotate; the propeller hub elastic support is arranged on the constant-speed universal hinged propeller hub of the rzeppa, the propeller hub elastic support is connected with the rotor shaft through the connecting support, and the propeller hub elastic support is used for supporting the constant-speed universal hinged propeller hub of the rzeppa and providing operation torque for the helicopter. The invention can enhance the operation performance of the helicopter and inhibit the vibration of the blades, and particularly can provide the tilting moment of the hub for the tilting rotorcraft in the tilting process and provide reference for the structural design of the constant-speed universal hinged hub of the ball cage of the helicopter.
In summary, the technical solution provided by the embodiments of the present invention is a constant-velocity universal hinged hub structure of a helicopter with a ball cage having a hub elastic support, which can overcome the disadvantage that the conventional constant-velocity universal hinged hub is difficult to provide an operation moment; when the helicopter is motorized, the universal propeller hub can be effectively controlled to follow the movement of the helicopter, the problem that the propeller hub is free to tilt under the action of external force due to no operation moment is prevented, the risk of out-of-control of the helicopter is caused, the operation performance of the constant-speed universal hinged propeller hub helicopter with the ball cage can be greatly enhanced, the maneuverability of the helicopter is improved, and the effect is obvious. In addition, the ball cage constant velocity universal hinge type propeller hub structure with the propeller hub elastic support provided by the invention can be used for popularizing and applying the constant velocity universal hinge type propeller hub to a tiltrotor, so that the application range of the constant velocity universal hinge type propeller hub is increased, technical support is provided for development of small and medium-sized helicopters, and the ball cage constant velocity universal hinge type propeller hub structure with the propeller hub elastic support has higher commercial value and popularization value.
Finally, it should be noted that: the above embodiments are only for illustrating the technical aspects of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the above embodiments, it should be understood by those of ordinary skill in the art that: modifications and equivalents may be made to the specific embodiments of the invention without departing from the spirit and scope of the invention, which is intended to be covered by the claims.
Claims (10)
1. A universal hinged hub structure comprising a hub elastic support, comprising: the constant-speed universal hinged propeller hub (1) of the ball cage, a propeller hub elastic support (2), a variable-pitch assembly (3) and a connecting bracket (4); wherein,
the constant-speed universal hinged propeller hub (1) of the ball cage is used for being connected with a rotor shaft (5) of the helicopter;
the pitch-changing assembly (3) is arranged on the constant-speed universal hinged hub (1) of the ball cage and is used for being connected with a blade (6) of the helicopter;
the propeller hub elastic support (2) is arranged on the constant-speed universal hinged propeller hub (1) of the rzeppa, the connecting bracket (4) is arranged on the propeller hub elastic support (2), and the connecting bracket (4) is used for being connected with a rotor shaft (5) of a helicopter; the elastic support (2) of the propeller hub is used for supporting the constant-speed universal hinged propeller hub (1) of the ball cage and providing an operating moment for the helicopter.
2. A universal hinged hub structure with elastic support of hub according to claim 1, characterized in that said birfield constant velocity universal hinged hub (1) comprises: a star sleeve (11), a retainer (12), steel balls (13) and a three-fork piece (14); wherein,
the star cover (11) is used for being connected with a rotor shaft (5) of the helicopter;
the three fork members (14) are used for being connected with the variable-pitch assembly (3);
the three-fork piece (14) is provided with a rollaway nest, the steel balls (13) are respectively contacted with the star-shaped sleeve (11) and the rollaway nest of the three-fork piece (14), and the retainer (12) is used for retaining the positions of the steel balls (13); the steel balls (13) are used for transmitting torque from the star sleeve (11) to the three fork members (14); the three fork members (14) can tilt around the star-shaped sleeve (11) to realize periodic pitch variation of the helicopter blades (6).
3. A gimbaled hub structure with elastic support of the hub according to claim 2, characterized in that the star (11) is intended to be connected to the rotor shaft (5) of a helicopter, in particular in that the star (11) is intended to be connected to the rotor shaft (5) of a helicopter by means of splines.
4. A universal hinged hub structure comprising a hub elastic support according to claim 1, characterized in that said hub elastic support (2) comprises: a lower gasket (21), an elastic body (22) and an upper connecting sheet (23); wherein,
the elastic body (22) is fixedly arranged between the lower gasket (21) and the upper connecting sheet (23), the lower gasket (21) is used for being connected with the constant velocity universal hinge type propeller hub (1) of the ball cage, and the upper connecting sheet (23) is used for being connected with the connecting bracket (4); wherein the elastomer (22) compresses to provide an operating moment when the rzeppa constant velocity universal hub (1) is tilted.
5. A hub structure comprising a flexible support of a hub according to claim 4, wherein said lower spacer (21), said elastomer (22) and said upper connecting piece (23) are vulcanized and integrally formed.
6. A universal hinged hub structure with elastic support of hub according to claim 4, characterized in that said elastomer (22) is a rubber elastomer.
7. A universal hinged hub structure with elastic support of the hub according to claim 2, characterized in that said pitch-changing assembly (3) comprises two deep-groove ball bearings (31), one thrust ball bearing (32) and a pitch-changing housing (33); wherein,
-the deep groove ball bearing (31) and the thrust ball bearing (32) are used to support the pitch-changing housing (33) on the three-fork piece (14), the pitch-changing assembly (3) being rotatable about the protruding axis of the three-fork piece (14);
the variable-pitch shell (33) is used for being connected with the blade (6).
8. The hub structure of claim 1, wherein said helicopter is a tiltrotor aircraft.
9. A method of operating a gimbaled hub structure having a hub elastic support as defined in claim 1, comprising:
the constant-speed universal hinged propeller hub (1) of the ball cage is connected with a rotor shaft (5) of the helicopter; the pitch-changing assembly (3) is arranged on the constant-speed universal hinged hub (1) of the ball cage and is connected with a blade (6) of the helicopter; the propeller hub elastic support (2) is arranged on the constant-speed universal hinged propeller hub (1) of the rzeppa, the connecting bracket (4) is arranged on the propeller hub elastic support (2), and the connecting bracket (4) is connected with a rotor shaft (5) of the helicopter;
when the helicopter is maneuvered, the constant-speed universal hinged propeller hubs (1) of the ball cages incline under the action of external force, the elastic supports (2) of the propeller hubs compress to generate elastic moment, the operation moment is provided, the inclination of the propeller discs is restrained, and the constant-speed universal hinged propeller hubs (1) of the ball cages are driven to move along the helicopter, so that the helicopter moves according to a preset track.
10. The method of claim 9, wherein the helicopter maneuvers in the form of one of a helicopter turn, fly forward, or lean.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410092437.6A CN117734936A (en) | 2024-01-22 | 2024-01-22 | Universal hinge type propeller hub structure with propeller hub elastic support and working method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410092437.6A CN117734936A (en) | 2024-01-22 | 2024-01-22 | Universal hinge type propeller hub structure with propeller hub elastic support and working method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117734936A true CN117734936A (en) | 2024-03-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410092437.6A Pending CN117734936A (en) | 2024-01-22 | 2024-01-22 | Universal hinge type propeller hub structure with propeller hub elastic support and working method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117734936A (en) |
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2024
- 2024-01-22 CN CN202410092437.6A patent/CN117734936A/en active Pending
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