Helicopter bearingless rotor wing
Through bearingless rotor design, complex rotor structures are abolished and flexible components are used to achieve rotor movement, which solves the problems of complex rotor structure, large weight and low handling efficiency in the existing technology, and achieves lightweight and efficient handling, which is suitable for complex landform environments and helicopters of different tonnages.
Patent Information
- Application Number
- CN202422581227.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-25
- Publication Date
- 2025-08-22
- Estimated Expiration
- 2034-10-25
AI Technical Summary
The existing helicopters have complex rotor structures, resulting in inconvenient maintenance, heavy weight, poor handling efficiency, and inability to fly in complex landform environments.
The bearing-free rotor design is adopted, and the waving hinge, swing vibration hinge and variable distance hinge are eliminated. The waving, swing vibration and variable distance movement are achieved through the flexible elements at the root of the blade. The structure is simple, the weight is light, and the handling efficiency is high.
It has achieved simple structure, light weight and high handling efficiency. It is suitable for flights in complex geomorphic environments and is suitable for helicopters of different tonnages, including small and large tonnage helicopters.
Smart Images
Figure CN223253266U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of helicopters, in particular to a bearingless rotor of a helicopter. Background Art
[0002] The rotor system is the core of the helicopter, used to provide the helicopter with lift. The rotor configurations of helicopters include: seesaw type, articulated type, hingeless type, bearingless type, etc.
[0003] However, the helicopter rotor in the prior art still has some defects:
[0004] The helicopter rotors in the prior art are of high quality, but the rotor hub structure is complex, which makes maintenance inconvenient. At the same time, the complex structure of the rotor hub leads to a heavy weight, resulting in poor control efficiency and inability to fly in complex terrain environments. Utility Model Content
[0005] In order to solve the above problems, the purpose of the present invention is to provide a bearingless rotor for a helicopter.
[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions: a helicopter bearingless rotor, the bearingless rotor comprising an upper rotor hub, a lower rotor hub, a lower rotor control system and an upper rotor control system;
[0007] The lower rotor hub and the upper rotor hub are symmetrically distributed, the upper rotor hub is arranged at the top of the outer ring of the inner shaft and is splined to the inner shaft, the lower rotor hub is arranged at the top of the outer ring of the outer shaft and is fixedly connected to the outer shaft spline, the outer shaft passes through the outer shaft sleeve, the outer shaft sleeve passes through the lower rotor control system and is located below the lower rotor hub, the lower rotor control system is arranged on the outer ring of the outer shaft sleeve, the upper rotor swash plate assembly in the upper rotor control system is fixedly connected to the outer diameter below the inner shaft, and the upper rotor connecting rod assembly of the lower rotor control system passes through the inner diameter of the inner shaft and is rotatably connected to the sleeve assembly in the upper rotor hub.
[0008] Preferably, the upper rotor hub includes an upper rotor hub blade joint, a composite sleeve assembly, a torsion bar assembly, a torsion bracket assembly, an upper rotor hub central piece assembly, an upper rotor upper bracket, an upper rotor buffer limit assembly, and an upper rotor rocker arm assembly.
[0009] Preferably, the upper rotor hub blade connector connects the upper rotor blade and the composite sleeve assembly to determine the initial angle of attack of the upper rotor blade;
[0010] The composite sleeve assembly includes the outer contour of the hub arm, the sleeve, the sleeve bushing, the sleeve cover and the baffle. The sleeve is provided with a weight-reducing observation hole for observing the internal structure.
[0011] One end of the torsion bar assembly passes through the composite sleeve assembly and is fixedly connected to the sleeve and the upper rotor hub blade joint, and the other end of the torsion bar assembly is fixedly connected to the upper rotor hub central component assembly;
[0012] The torsion bracket assembly includes a joint bearing and a torsion bracket. The torsion bracket assembly is located at one end of the composite sleeve close to the upper rotor hub central component assembly and is fixedly connected to the composite sleeve.
[0013] The upper rotor hub central piece assembly includes an upper rotor hub central piece, an upper rotor lower cover plate, and a torsion shaft piece. The upper rotor hub central piece is fixedly connected to the inner shaft. The upper rotor hub central piece torsion shaft piece passes through a joint bearing and is rotatably connected to the joint bearing. The upper rotor hub central piece and the upper rotor lower cover plate are pressed against a torsion bar assembly at both ends, and the two ends are fixedly connected to the torsion bar assembly. The upper rotor lower cover plate of the upper rotor hub central piece assembly is fixedly connected to a guide bracket in an upper rotor buffer limit assembly.
[0014] The upper rotor buffer limit assembly includes a guide bracket, a buffer limit elastic fixing part, a pin, a buffer shaft, a buffer limit ring and a spring. The guide bracket is mounted on the lower cover plate of the upper rotor. The buffer limit ring passes through the bottom of the upper rotor hub central part. The buffer limit elastic fixing part is rotatably connected to the side of the buffer shaft close to the composite sleeve assembly through the pin. The spring is assembled on the buffer shaft. The buffer shaft passes through the guide bracket, one end is connected to the buffer limit ring, and the other end is connected to the upper baffle of the composite sleeve assembly through the buffer limit elastic fixing part.
[0015] The upper rotor rocker arm assembly includes an upper rotor rocker arm base and a rocker arm shaft. The upper rotor rocker arm base is attached to one end of the composite sleeve assembly close to the upper rotor hub central component assembly and is fixedly connected to the composite sleeve assembly. One end of the rocker arm shaft is fixedly connected to the upper rotor rocker arm base, and the other end of the rocker arm shaft is connected to the upper rotor control rod. The upper rotor control system controls the upper rotor hub through the rocker arm shaft.
[0016] The lower rotor hub is provided with a lower rotor upward limit assembly and a lower rotor hub central piece;
[0017] One end of the lower rotor upswing limit assembly is fixed to the lower rotor hub central piece through an upswing torsion shaft, and the other end of the lower rotor upswing limit assembly is fixed to the lower rotor hub central piece through a spring connection spring fixing assembly.
[0018] Preferably, the upper rotor hub central piece assembly passes through the inner shaft and is fixedly connected to the spline of the inner shaft, one end of the upper rotor upper bracket is fixedly connected to the upper rotor hub central piece assembly, the other end of the upper rotor upper bracket is fixedly connected to the upper rotor connecting rod assembly in the upper rotor control system, both ends of the torsion bracket assembly are fixedly connected to the composite sleeve assembly, one end of the torsion shaft in the upper rotor hub central piece assembly is fixed below the upper rotor hub central piece, and the other end passes through the joint bearing in the torsion bracket assembly and is rotatably connected to the torsion bracket assembly, one end of the torsion strip assembly is fixed between the upper rotor hub central piece of the upper rotor hub central piece assembly and the upper rotor lower cover plate, the other end of the torsion strip assembly passes through the composite sleeve assembly and is fixedly connected to the upper rotor hub blade joint and the composite sleeve assembly, and one end of the composite sleeve assembly is fixed to the torsion bracket assembly The cam is fixedly connected to the upper rotor hub blade joint and the torsion bar assembly, and one end of the upper rotor hub blade joint is fixedly connected to the composite sleeve assembly and the torsion bar assembly. The other end of the upper rotor hub blade joint is fixedly connected to the blade through a blade pin. The intermediate joint bearing of the torsion bracket assembly is rotatably connected to the torsion shaft in the upper rotor hub central piece assembly. The upper rotor lower cover plate of the upper rotor hub central piece assembly is fixedly connected to the guide lower bracket in the upper rotor buffer limit assembly. The rocker base in the upper rotor rocker arm assembly is fixedly connected to the composite sleeve assembly. The rocker shaft in the upper rotor rocker arm assembly is rotatably connected to the upper rotor connecting rod assembly in the upper rotor control system. The upper rotor buffer limit assembly passes through the lower extension shaft of the upper rotor hub central piece and is fixedly connected to the upper rotor lower cover plate of the upper rotor hub central piece assembly.
[0019] Preferably, the lower rotor hub includes a lower hub blade joint, a composite sleeve assembly, a torsion bar assembly, a torsion bracket assembly, a lower rotor hub central piece assembly, a lower rotor buffer limit assembly, and a lower rotor rocker arm assembly.
[0020] Compared with the prior art, the beneficial effects of the present invention are:
[0021] 1. In this utility model, by adopting a bearingless rotor, the rotor with flapping hinge, shimmying hinge and pitch-changing hinge is eliminated. The flapping, shimmying and pitch-changing motions of the blades are completed by the flexible element at the root of the blades, which has a simple structure and is lighter in weight.
[0022] 2. In the present invention, by adopting a bearingless rotor, the helicopter bearingless rotor has the advantages of simple structure, high control efficiency, good agility, high reliability, and simple maintenance;
[0023] 3. In this invention, by adopting a bearingless rotor, the equivalent horizontal extension is large, which has good control performance. Compared with the seesaw configuration, it has better maneuverability and can be used to fly in complex terrain environments such as plateaus and canyons;
[0024] 4. In the utility model, by adopting a bearingless rotor, it can be applied to helicopters of different tonnages. After being applied to small helicopters, it can be applied to subsequent large-tonnage helicopters. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0026] Figure 1 This is a schematic diagram of the rotor system structure of the present utility model.
[0027] Figure 2 This is a schematic diagram of the upper rotor hub structure of the present utility model.
[0028] Figure 3 This is a schematic diagram of the lower rotor hub structure of the present utility model.
[0029] Figure 4 This is a schematic structural diagram of the upper rotor control system of the present utility model.
[0030] Figure 5 This is a schematic structural diagram of the lower rotor control system of the present utility model.
[0031] In the figure: 101, upper rotor hub; 102, inner shaft; 103, lower rotor hub; 104, outer shaft; 105, outer shaft sleeve; 106, lower rotor control system; 107, upper rotor control system; 201, upper rotor hub blade joint; 203, composite sleeve assembly; 204, torsion bar assembly; 205, torsion bracket assembly; 206, upper rotor hub centerpiece assembly; 207, upper rotor upper bracket; 208, upper rotor buffer limit assembly; 2010, upper rotor rocker arm assembly; 301, lower hub blade joint; 306, lower rotor hub centerpiece assembly; 307, lower rotor buffer limit assembly; 309, lower rotor rocker arm assembly; 401, lower rotor upswing limit assembly; 402, lower rotor hub centerpiece. DETAILED DESCRIPTION
[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0033] Example: Figure 1-5 As shown, the present invention provides a bearingless rotor for a helicopter, which includes an upper rotor hub 101, a lower rotor hub 103, a lower rotor control system 106 and an upper rotor control system 107;
[0034] The lower rotor hub 103 and the upper rotor hub 101 are symmetrically distributed. The upper rotor hub 101 is arranged at the top of the outer ring of the inner shaft 102 and is splined to the inner shaft 102. The lower rotor hub 103 is arranged at the top of the outer ring of the outer shaft 104 and is fixedly connected to the outer shaft 104 by spline. The outer shaft 104 passes through the outer shaft sleeve 105. The outer shaft 104 passes through the outer shaft sleeve 105. The outer shaft sleeve 105 passes through the lower rotor control system 106 and is located below the lower rotor hub 103. The lower rotor control system 106 is arranged on the outer ring of the outer shaft sleeve 105. The lower rotor connecting rod assembly in the lower rotor control system 106 is rotatably connected to the lower rotor sleeve assembly. The upper rotor swash plate assembly in the upper rotor control system 107 is fixedly connected to the outer diameter below the inner shaft. The upper rotor connecting rod assembly of the lower rotor control system 106 passes through the inner diameter of the inner shaft and is rotatably connected to the sleeve assembly in the upper rotor hub 101.
[0035] The upper rotor hub 101 includes an upper rotor hub blade joint 201, a composite sleeve assembly 203, a torsion bar assembly 204, a torsion bracket assembly 205, an upper rotor hub central piece assembly 206, an upper rotor upper bracket 207, an upper rotor buffer limit assembly 208, and an upper rotor rocker arm assembly 2010. The upper rotor hub blade joint 201, the torsion bar assembly 204, the torsion bracket assembly 205, the upper rotor hub central piece assembly 206 and the upper rotor rocker arm assembly 2010 are functional parts of the upper rotor hub 101, and the functional parts are used to realize the three kinds of motions of the blades: collective pitch, periodic, and differential. The upper rotor buffer limit assembly 208 is a limiting part.
[0036] The upper rotor hub blade connector 201 connects the upper rotor hub blade and the composite sleeve assembly 203 to determine the initial angle of attack of the upper rotor blade;
[0037] The composite sleeve assembly 203 includes the outer contour of the hub arm, the sleeve, the sleeve bushing, the sleeve cover and the baffle. The sleeve is provided with a weight-reducing observation hole for observing the internal structure.
[0038] One end of the torsion bar assembly 204 passes through the composite sleeve assembly 203 and is fixedly connected to the sleeve and the upper rotor hub blade joint 201, and the other end of the torsion bar assembly 204 is fixedly connected to the upper rotor hub central component assembly 206;
[0039] The torsion bracket assembly 205 includes a spherical bearing and a torsion bracket. The torsion bracket assembly 205 is located at one end of the composite sleeve close to the upper rotor hub central component assembly 206 and is fixedly connected to the composite sleeve.
[0040] The upper rotor hub central component assembly 206 includes an upper rotor hub central component, an upper rotor lower cover plate, and a torsion shaft component. The upper rotor hub central component is fixedly connected to the inner shaft 102. The upper rotor hub central component torsion shaft component passes through the joint bearing and is rotatably connected to the joint bearing. The two ends of the upper rotor hub central component and the upper rotor lower cover plate that are pressed together are fixedly connected to the torsion bar assembly 204. The upper rotor lower cover plate of the upper rotor hub central component assembly 206 is fixedly connected to the guide bracket in the upper rotor buffer limit assembly 208.
[0041] The upper rotor buffer limit assembly 208 includes a guide bracket, a buffer limit elastic fixing member, a pin, a guide bracket, a buffer shaft, a buffer limit ring and a spring. The guide bracket is mounted on the lower cover plate of the upper rotor. The buffer limit ring passes under the central member of the upper rotor hub. The buffer limit elastic fixing member is rotatably connected to the side of the buffer shaft near the composite sleeve assembly 203 via the pin. The spring is assembled on the buffer shaft. The buffer shaft passes through the guide bracket, one end of which is connected to the buffer limit ring, and the other end is connected to the upper baffle of the composite sleeve assembly 203 via the buffer limit elastic fixing member.
[0042] The upper rotor rocker arm assembly 2010 includes an upper rotor rocker arm base and a rocker arm shaft. The upper rotor rocker arm base is attached to one end of the composite sleeve assembly 203 near the upper rotor hub centerpiece assembly 206 and is fixedly connected to the composite sleeve assembly 203. One end of the rocker arm shaft is fixedly connected to the upper rotor rocker arm base, and the other end of the rocker arm shaft is connected to the upper rotor control rod. The upper rotor control system 107 controls the upper rotor hub 101 through the rocker arm shaft.
[0043] A lower rotor hub (103) is provided with a lower rotor upward swing limit assembly (401) and a lower rotor hub central component (402);
[0044] One end of the lower rotor upswing limit assembly 401 is fixed to the lower rotor hub central piece 402 through the upswing torsion shaft, and the other end of the lower rotor upswing limit assembly 401 is fixed to the lower rotor hub central piece 402 through a spring connection spring fixing assembly. When the lower rotor assembly rotates at low speed, the lower rotor upswing limit assembly 401 is fixed to the span direction of the blade under the action of the spring tension. When the lower rotor encounters a gust of wind, it plays a limiting role when the rotor swings up. When the lower rotor assembly rotates at high speed, the centrifugal force it is subjected to is greater than the spring tension, and the lower rotor upswing limit assembly 401 deviates from the span direction of the blade, and the rotor is not disturbed.
[0045] The upper rotor hub central component assembly 206 passes through the inner shaft 102 and is fixedly connected to the spline of the inner shaft 102. One end of the upper rotor upper bracket 207 is fixedly connected to the upper rotor hub central component assembly 206. The other end of the upper rotor upper bracket 207 is fixedly connected to the upper rotor connecting rod assembly in the upper rotor control system 107. The two ends of the torsion bracket assembly 205 are fixedly connected to the composite sleeve assembly 203. One end of the torsion shaft in the upper rotor hub central component assembly 206 is fixed below the upper rotor hub central component, and the other end is fixed to the upper rotor hub central component. The end of the torsion bracket assembly 205 passes through the joint bearing of the torsion bracket assembly 205 and is rotatably connected to the torsion bracket assembly 205. One end of the torsion bar assembly 204 is fixed between the upper rotor hub central piece of the upper rotor hub central piece assembly 206 and the upper rotor lower cover plate. The other end of the torsion bar assembly 204 passes through the composite sleeve assembly 203 and is fixedly connected to the upper rotor hub blade joint 201 and the composite sleeve assembly 203. One end of the composite sleeve assembly 203 is fixed on the torsion bracket assembly 205, and the other end of the composite sleeve assembly 203 It is fixedly connected to the upper rotor hub blade joint 201 and the torsion bar assembly 204, one end of the upper rotor hub blade joint 201 is fixedly connected to the composite sleeve assembly 203 and the torsion bar assembly 204, the other end of the upper rotor hub blade joint 201 is fixedly connected to the blade through a blade pin, the torsion shaft in the upper rotor hub central component assembly 206 is rotatably connected to the torsion bracket assembly 205, the intermediate joint bearing of the torsion bracket assembly 205 is rotatably connected to the torsion shaft in the upper rotor hub central component assembly 206, and the upper The upper rotor lower cover plate of the rotor hub central piece assembly 206 is fixedly connected to the guide bracket in the upper rotor buffer limit assembly 208, the rocker base in the upper rotor rocker arm assembly 2010 is fixedly connected to the composite sleeve assembly 203, the rocker shaft in the upper rotor rocker arm assembly 2010 is rotatably connected to the upper rotor intermediate connecting rod in the upper rotor control system 107, and the upper rotor buffer limit assembly 208 passes through the lower extension shaft of the upper rotor hub central piece and is fixedly connected to the upper rotor lower cover plate of the upper rotor hub central piece assembly 206.
[0046] The composite sleeve assembly 203 is a sleeve-shaped thin-walled component. The sleeve structure of the composite sleeve assembly 203 is an elliptical sleeve structure with the short axis in the vertical direction. It is a special-shaped structure. The sleeve is made of glass fiber reinforced composite material ply. The structure and material of the sleeve can make it have sufficient strength. A plurality of sleeve observation holes are also provided on both sides of the sleeve structure. On the one hand, it is helpful to reduce the weight of the sleeve. On the other hand, the sleeve observation holes can facilitate the observation of the use status of the tension and twist strip assembly 204, which is convenient for timely maintenance.
[0047] The torsion bracket assembly 205 is located between the sleeve ends of the composite sleeve assembly 203 and the upper rotor hub centerpiece assembly 206, and is rotatably connected to the spherical bearing in the torsion bracket assembly 205 via a torsion shaft installed in the upper rotor hub centerpiece assembly 206. Specifically, the torsion shaft passes through the inner hole of the spherical bearing, and the composite sleeve assembly 203 can move around the spherical bearing. There is no structural limit on the spherical bearing extending outward.
[0048] The limiting portion includes an upper rotor buffer limit assembly 208, which is used to limit the positional relationship of the functional portion of the hub relative to the upper rotor hub central component assembly 206. The buffer limit ring of the upper rotor buffer limit assembly 208 is sleeved under the upper rotor hub central component, the guide bracket is installed on the upper rotor lower cover plate, and the baffle is located on the composite sleeve. The buffer limit ball supports the movement of the limit baffle, so that the control movement of the hub is controlled within the swing range;
[0049] One end of the torsion bar assembly 204 is superimposed between the upper rotor hub center piece of the upper rotor hub center piece assembly 206 and the upper rotor lower cover plate, and is tightened with bolts, and the other end is fixedly connected to the upper rotor hub blade connector 201 and the composite sleeve assembly 203 by bolts;
[0050] The upper rotor rocker arm assembly 2010 is mounted on the side of the composite sleeve assembly 203 near one end of the upper rotor hub centerpiece and is used to connect to the upper rotor control system 107 that provides force for the rotor hub pitch change movement. The movement principle of the lower rotor hub 103 and the lower rotor control system 106 is the same as that of the upper rotor hub 101 and the upper rotor control system 107.
[0051] The upper rotor control system 107 is mounted on the inner shaft 102. The control link is located inside the inner shaft 102, connected to the upper rotor upper bracket 207, and further connected to the upper rotor rocker assembly 2010. The movement of the upper rotor control system 107 is controlled by the servo to move the upper rotor automatic tilt device. During cyclic pitch control, the upper rotor automatic tilt device rotates around the upper rotor joint bearing, and the rotation is transmitted to the upper rotor sleeve rocker arm through the connecting rod, which controls the rotation of the sleeve assembly.
[0052] During collective pitch control, the upper rotor automatic tilt device and the upper rotor joint bearing move up and down along the inner shaft 102 as a whole, and the movement is transmitted to the upper rotor sleeve rocker arm through the connecting rod to control the sleeve assembly to rotate;
[0053] Cyclic pitch control: Through different control amounts of the servo, the automatic tilt device tilts accordingly, so that the pitch of the blades changes cyclically once a week, causing the rotor thrust vector to tilt in the corresponding direction, thereby controlling the forward, backward (left, right) and pitch (or roll) movement of the helicopter.
[0054] The collective pitch control system is used to control the rotor's collective pitch, increasing or decreasing the pitch of each blade simultaneously, thereby changing the rotor's thrust. Both the rotor's collective pitch and cyclic pitch control are achieved through the automatic tilt mechanism.
[0055] The lower rotor hub 103 includes a lower hub blade joint 301, a composite sleeve assembly, a torsion bar assembly, a torsion bracket assembly, a lower rotor hub central piece assembly 306, a lower rotor buffer limit assembly 307, and a lower rotor rocker arm assembly 309.
[0056] The lower rotor control system 106 is mounted on the outer shaft sleeve 105 and connected to the lower rotor rocker arm assembly 309 via a tie rod;
[0057] The movement of the lower rotor automatic tilt device is achieved by manipulating the servo to drive the lower rotor pull rod, thereby manipulating the lower rotor sleeve assembly to achieve collective pitch and cyclic pitch control.
[0058] Obviously, those skilled in the art may make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if such modifications and variations fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include such modifications and variations.
Claims
1. A helicopter bearingless rotor, characterized in that: The bearingless rotor comprises an upper rotor hub (101), a lower rotor hub (103), a lower rotor control system (106) and an upper rotor control system (107); The lower rotor hub (103) and the upper rotor hub (101) are symmetrically distributed, the upper rotor hub (101) is arranged at the top of the outer ring of the inner shaft (102) and is spline-connected to the inner shaft (102), the lower rotor hub (103) is arranged at the top of the outer ring of the outer shaft (104) and is spline-fixedly connected to the outer shaft (104), the outer shaft (104) passes through the outer shaft sleeve (105), the outer shaft sleeve (105) passes through the lower rotor control system (106) and is located below the lower rotor hub (103), the lower rotor control system (106) is arranged on the outer ring of the outer shaft sleeve (105), the upper rotor swash plate assembly in the upper rotor control system (107) is fixedly connected to the outer diameter below the inner shaft, and the upper rotor connecting rod assembly of the lower rotor control system (106) passes through the inner diameter of the inner shaft and is rotatably connected to the sleeve assembly in the upper rotor hub (101).
2. The helicopter bearingless rotor according to claim 1, characterized in that: The upper rotor hub (101) comprises an upper rotor hub blade joint (201), a composite sleeve assembly (203), a torsion bar assembly (204), a torsion bracket assembly (205), an upper rotor hub central piece assembly (206), an upper rotor upper bracket (207), an upper rotor buffer limit assembly (208), and an upper rotor rocker arm assembly (2010).
3. The helicopter bearingless rotor according to claim 2, characterized in that: The upper rotor hub blade connector (201) connects the upper rotor blade and the composite sleeve assembly (203) to determine the initial angle of attack of the upper rotor blade; The composite sleeve assembly (203) comprises an outer contour of a propeller hub support arm, a sleeve, a sleeve bushing, a sleeve cover plate and a baffle, and a weight-reducing observation hole is provided on the sleeve for observing the internal structure; One end of the pull-twist strip assembly (204) passes through the composite sleeve assembly (203) and is fixedly connected to the sleeve and the upper rotor hub blade joint (201), and the other end of the pull-twist strip assembly (204) is fixedly connected to the upper rotor hub central component assembly (206); The torsion bracket assembly (205) comprises a joint bearing and a torsion bracket, and the torsion bracket assembly (205) is located at one end of the composite sleeve close to the upper rotor hub central component assembly (206) and is fixedly connected to the composite sleeve; The upper rotor hub central component assembly (206) includes an upper rotor hub central component, an upper rotor lower cover plate, and a torsion shaft component. The upper rotor hub central component is fixedly connected to the inner shaft (102). The upper rotor hub central component torsion shaft component passes through the joint bearing and is rotatably connected to the joint bearing. The upper rotor hub central component and the upper rotor lower cover plate are pressed against the torsion bar assembly (204) at both ends, and the two ends are fixedly connected to the torsion bar assembly (204). The upper rotor lower cover plate of the upper rotor hub central component assembly (206) is fixedly connected to the guide bracket in the upper rotor buffer limit assembly (208); The upper rotor buffer limit assembly (208) comprises a guide bracket, a buffer limit elastic fixing member, a pin, a buffer shaft, a buffer limit ring and a spring, wherein the guide bracket is mounted on the upper rotor lower cover plate, the buffer limit ring passes through the lower side of the upper rotor hub central member, the buffer limit elastic fixing member is rotatably connected to the buffer shaft on a side close to the composite sleeve assembly (203) via the pin, the spring is assembled on the buffer shaft, the buffer shaft passes through the guide bracket, one end is connected to the buffer limit ring, and the other end is connected to the upper baffle of the composite sleeve assembly (203) via the buffer limit elastic fixing member; The upper rotor rocker arm assembly (2010) comprises an upper rotor rocker arm base and a rocker arm shaft. The upper rotor rocker arm base is fitted on one end of the composite sleeve assembly (203) close to the upper rotor hub central component assembly (206) and is fixedly connected to the composite sleeve assembly (203). One end of the rocker arm shaft is fixedly connected to the upper rotor rocker arm base. The other end of the rocker arm shaft is connected to the upper rotor control rod. The upper rotor control system (107) controls the upper rotor hub (101) via the rocker arm shaft. The lower rotor hub (103) is provided with a lower rotor upward limit assembly (401) and a lower rotor hub central component (402); One end of the lower rotor upward swing limiting assembly (401) is fixed to the lower rotor hub central piece (402) via an upward swing torsion shaft, and the other end of the lower rotor upward swing limiting assembly (401) is fixed to the lower rotor hub central piece (402) via a spring connection spring fixing assembly.
4. The helicopter bearingless rotor according to claim 3, characterized in that: The upper rotor hub central component assembly (206) passes through the inner shaft (102) and is fixedly connected to the spline of the inner shaft (102); one end of the upper rotor upper bracket (207) is fixedly connected to the upper rotor hub central component assembly (206); the other end of the upper rotor upper bracket (207) is fixedly connected to the upper rotor connecting rod assembly in the upper rotor control system (107); both ends of the torsion bracket assembly (205) are fixedly connected to the composite sleeve assembly (203); one end of the torsion shaft in the upper rotor hub central component assembly (206) is fixed to the upper rotor The other end of the pull-twist strip assembly (204) is fixed between the upper rotor hub central piece and the upper rotor lower cover plate of the upper rotor hub central piece assembly (206), and the other end of the pull-twist strip assembly (204) passes through the composite sleeve assembly (203) and is fixedly connected to the upper rotor hub blade joint (201) and the composite sleeve assembly (203). One end of the composite sleeve assembly (203) is fixed to the torsion bracket assembly. (205), the other end of the composite sleeve assembly (203) is fixedly connected to the upper rotor hub blade joint (201) and the torsion bar assembly (204), one end of the upper rotor hub blade joint (201) is fixedly connected to the composite sleeve assembly (203) and the torsion bar assembly (204), the other end of the upper rotor hub blade joint (201) is fixedly connected to the blade through a blade pin, the middle joint bearing of the torsion bracket assembly (205) is rotatably connected to the torsion shaft in the upper rotor hub central component assembly (206), and the upper rotor hub The upper rotor lower cover plate of the central component assembly (206) is fixedly connected to the guide lower bracket in the upper rotor buffer limit assembly (208); the rocker base in the upper rotor rocker assembly (2010) is fixedly connected to the composite sleeve assembly (203); the rocker shaft in the upper rotor rocker assembly (2010) is rotatably connected to the upper rotor connecting rod assembly in the upper rotor control system (107); and the upper rotor buffer limit assembly (208) passes through the lower extension shaft of the upper rotor hub central component and is fixedly connected to the upper rotor lower cover plate of the upper rotor hub central component assembly (206).