Tail rotor for providing backward thrust of helicopter
By designing a detachable helicopter tail rotor and an automatic bird-driven system, the problem of the tail rotor in the prior art is not spliced in segments and cannot automatically drive birds, achieving convenient assembly and improved flight safety.
Patent Information
- Application Number
- CN202421158770.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-24
- Publication Date
- 2024-12-27
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
Most of the existing helicopter tail rotors are integrated and cannot be spliced in segments, resulting in inconvenience in handling and unable to automatically drive away nearby birds, affecting normal flight.
A removable tail rotor including wings, blades, blades of No. 1 and blades of No. 2 are designed. They are connected by a reducer and connector. The blades are composed of retractable side bolts and plugs, equipped with radar sensors and The liquid spray pump can automatically drive away birds.
It realizes simple disassembly and assembly and handling of the tail rotor, convenient assembly, and automatically drives birds through radar sensors and liquid spray pump systems to prevent them from affecting flight.
Smart Images
Figure CN222247634U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of helicopters, in particular to a tail rotor providing backward thrust for a helicopter. Background Art
[0002] The tail rotor of a helicopter is a component used to balance the anti-torque and control the heading of the helicopter. The rotating tail rotor is equivalent to a vertical stabilizer, which can stabilize the heading of the helicopter. Although the function of the rear propeller is different from that of the rotor, they both generate aerodynamic force by rotation and work in an asymmetric airflow when flying forward. Therefore, the tail rotor structure has many similarities with the rotor structure. The structural forms of the tail rotor include seesaw type, universal joint type, articulated type, bearingless type, "ducted tail rotor" type, etc. The previous forms are similar to the discussion in the rotor form, except that the articulated tail rotor is generally not equipped with a swing hinge. Since the 1970s, bearingless tail rotors (including cross-arranged bearingless tail rotors) and "ducted tail rotors" have been developed. The "ducted tail rotor" is to place the tail rotor in the "duct" of the tail beam of the fuselage.
[0003] During flight, the helicopter's tail rotor provides backward force, mainly by rotating the tail rotor blades to generate aerodynamics, thereby forming a torque in the opposite direction of rotation of the helicopter's main rotor, in order to achieve the purpose of balancing and stabilizing the helicopter. Existing helicopters can adjust thrust by controlling the direction of rotor rotation.
[0004] However, in actual use, the existing helicopter tail rotors have the following problems: most helicopter tail rotors are integrated and cannot be spliced in sections, which is very inconvenient to carry; secondly, the tail rotor cannot automatically repel birds. When birds approach, it can easily affect the normal operation of the tail rotor. Therefore, a tail rotor that provides backward thrust for the helicopter is needed to solve the above problems. Utility Model Content
[0005] The utility model aims to solve the shortcomings in the prior art and proposes a tail rotor which provides backward thrust for a helicopter.
[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a tail rotor for providing backward thrust for a helicopter, comprising a wing, a blade, a blade No. 1 and a blade No. 2, a reducer is installed on the front of the wing, the front transmission connection of the reducer is connected to an output end, the front of the output end is clamped with a connector, the back of the connector is provided with a round head interface, the round head interface and the end of the output end are adapted to each other, the blade consists of a blade No. 1 and a blade No. 2, the top and bottom of the blade are blade No. 1, and the middle of the blade is blade No. 2.
[0007] Preferably, connecting arms are installed on both sides, top and bottom of the joint, one end of the connecting arm is threadedly connected to an arm shaft, and the top, middle and bottom of the front side of the blade are embedded with mounting hoops.
[0008] Preferably, the top, middle and bottom of the front side of the arm shaft are provided with through holes, and a threaded locking bolt passes through between the mounting hoop and the arm shaft.
[0009] Preferably, an insert block is provided at the bottom end of the No. 1 leaf, and the insert block and the No. 1 leaf are integrated. Both sides of the No. 1 leaf are connected with retractable side bolts, and the outer sides of the retractable side bolts are threadedly connected with side caps.
[0010] Preferably, slots are provided at the top and bottom of the second leaf, the slots and the plug blocks are adapted to each other, side holes are provided on both sides of the slots, the retractable side bolts pass through the side holes, and the retractable side bolts and the side holes are adapted to each other.
[0011] Preferably, a radar sensor is installed on one side of the front side of the second lobe, and a spray hole is opened on the other side of the front side of the second lobe.
[0012] Preferably, an inner chamber is provided in the middle of the second leaf, a solution tank is clamped inside the inner chamber, a spray pump is installed at the top of the solution tank, a nozzle is connected to the top of the spray pump, and one end of the nozzle is clamped to the inner side of the spray hole.
[0013] Beneficial Effects
[0014] In the utility model, the tail rotor of the equipment is mainly composed of four groups of blades, each group of blades is detachable, and during assembly, first put the No. 2 blade vertically, and then install the upper and lower No. 1 blades in the same way, squeeze the retractable side bolts on both sides of the plug block at the bottom of the No. 1 blade inward, the retractable side bolts are spring columns, which are retractable, and after being squeezed inward, the retractable side bolts will fit with the sides of the plug block, and then the plug block is directly inserted into the slot of the No. 2 blade, and the retractable side bolts on both sides of the plug block entering the slot will pop out directly from the side holes, and then use the side cap thread to tighten it to fix it, and the installation of the blades is completed after the upper and lower parts are assembled, and the entire installation procedure is simple, which solves the problem that most helicopter tail rotors are integrated and cannot be spliced in sections, which is very inconvenient during transportation.
[0015] In the utility model, the radar sensor on the front side of the second blade is used to sense in real time whether there are birds approaching in the surrounding area. When it senses that a bird is approaching, a start signal will be transmitted to the spray pump in the inner chamber through the built-in MCU. After receiving the signal, the spray pump will draw bird repellent from the solution tank and spray it to the outside from the spray hole through the nozzle, so as to drive away the approaching birds and prevent them from affecting normal flight. This solves the problem that the tail rotor part cannot automatically drive away birds, and when birds approach, it will easily affect the normal operation of the tail rotor. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is the overall structure diagram of the utility model;
[0017] Figure 2 This is the installation structure diagram of the utility model;
[0018] Figure 3 This is a disassembled structure diagram of the blade of the utility model;
[0019] Figure 4 This is a diagram of the blade installation structure of the utility model;
[0020] Figure 5 This is the second leaf structure diagram of the utility model.
[0021] Legend:
[0022] 1. Wing; 2. Connecting arm; 3. Blade; 4. Joint; 5. Reducer; 6. Output end; 7. Arm shaft; 8. Round head interface; 9. Mounting hoop; 10. Threaded lock bolt; 11. No. 1 blade; 12. No. 2 blade; 13. Side hole; 14. Side cap; 15. Insert block; 16. Retractable side bolt; 17. Slot; 18. Perforation; 19. Spray hole; 20. Inner chamber; 21. Nozzle; 22. Spray pump; 23. Solution tank; 24. Radar sensor. DETAILED DESCRIPTION
[0023] In order to make the technical means, creative features, objectives and effects of the present invention easy to understand, the present invention is further described below in conjunction with specific embodiments and drawings, but the following embodiments are only preferred embodiments of the present invention, not all. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the protection scope of the present invention.
[0024] The specific embodiments of the present utility model are described below in conjunction with the accompanying drawings. Specific embodiment one:
[0026] Reference Figure 1-5A tail rotor that provides backward thrust for a helicopter comprises a wing 1, a blade 3, a blade No. 11 and a blade No. 2 12. A reducer 5 is installed on the front of the wing 1. The front transmission connection of the reducer 5 is connected with an output end 6. The front of the output end 6 is clamped with a connector 4. A round head interface 8 is provided on the back of the connector 4. The round head interface 8 and the end of the output end 6 are adapted to each other. The blade 3 consists of a blade No. 11 and a blade No. 2 12. The top and bottom of the blade 3 are the blade No. 11, and the middle part of the blade 3 is the blade No. 2 12. The connection method between the output end 6 of the wing 1 and the blade 3 is not the focus of protection of the present invention, so it will not be described in detail here.
[0027] As shown in the figure, it can be seen that the tail propeller of this equipment is mainly composed of four groups of blades 3, each group of blades 3 is detachable, and the rotation of the blades 3 is mainly driven indirectly by the reducer 5. The reducer 5 drives the joint 4 to rotate by controlling the rotation of the output end 6. Arm shafts 7 are installed in four directions of the joint 4, and the assembled blades 3 will be directly installed on the arm shaft 7 for fixation.
[0028] Connecting arms 2 are installed on both sides, top and bottom of the joint 4, one end of the connecting arm 2 is threadedly connected to an arm shaft 7, and mounting hoops 9 are embedded on the top, middle and bottom of the front of the blade 3.
[0029] The top, middle and bottom of the front side of the arm shaft 7 are provided with through holes 18 , and a threaded locking bolt 10 passes through between the mounting hoop 9 and the arm shaft 7 .
[0030] An insert block 15 is provided at the bottom end of the No. 1 leaf 11 , and the insert block 15 and the No. 1 leaf 11 are integrated. Both sides of the No. 1 leaf 11 are connected with retractable side bolts 16 , and the outer sides of the retractable side bolts 16 are threadedly connected with side caps 14 .
[0031] The top and bottom of the second leaf 12 are provided with slots 17, the slots 17 and the plug blocks 15 are adapted to each other, side holes 13 are provided on both sides of the slots 17, retractable side bolts 16 pass through the side holes 13, and the retractable side bolts 16 and the side holes 13 are adapted to each other.
[0032] During assembly, first place the No. 2 leaf 12 vertically, and then the installation steps of the upper and lower No. 1 leaves 11 are the same. The retractable side bolts 16 on both sides of the plug block 15 at the bottom of the No. 1 leaf 11 are squeezed inward. The retractable side bolts 16 are spring columns and can be retracted. After squeezing inward, the retractable side bolts 16 will fit with the side of the plug block 15, and then the plug block 15 is directly inserted into the slot 17 of the No. 2 leaf 12. The retractable side bolts 16 on both sides of the plug block 15 that enter the slot 17 will pop out directly from the side holes 13 on the side, and then use the side cap 14 to tighten it with threads to fix it. After the upper and lower parts are assembled, the installation of the blade 3 is completed, and the entire installation step is simple. Specific embodiment 2:
[0034] Reference Figure 1-5 A radar sensor 24 is installed on one side of the front of the second leaf 12, and a spray hole 19 is opened on the other side of the front of the second leaf 12.
[0035] An inner chamber 20 is provided in the middle of the second leaf 12, and a solution tank 23 is clamped inside the inner chamber 20. A spray pump 22 is installed at the top of the solution tank 23. A nozzle 21 is connected to the top of the spray pump 22. One end of the nozzle 21 is clamped with the inner side of the spray hole 19.
[0036] Although the No. 2 leaf 12 has an inner chamber 20 and a part of it is hollow, the actual weight of the No. 2 leaf 12 is the same as that of the No. 1 leaf 12, so it will not affect its use. The radar sensor 24 on the front side of the No. 2 leaf 12 is used to sense in real time whether there are birds approaching in the surrounding area. When a bird is sensed approaching, a start signal will be transmitted to the spray pump 22 in the inner chamber through the built-in MCU. After receiving the signal, the spray pump 22 will suck the bird repellent from the solution tank 23 and spray it to the outside from the spray hole 19 through the nozzle 21, so as to drive away the approaching birds and prevent them from affecting normal flight. The specific types of bird repellents will not be described in detail here, and need to be set according to actual conditions. At the same time, the spray pump 22 here is a kind of metering pump, and the amount of each suction is pre-set. The sprayed agent is in mist, the aperture of the spray hole 19 is small, and the back is blocked by the nozzle 21, so no excess wind will enter.
[0037] In summary:
[0038] 1. The tail propeller of this equipment is mainly composed of four groups of blades 3, each group of blades 3 is detachable, and the rotation of the blades 3 is mainly driven indirectly by the reducer 5, and the reducer 5 drives the joint 4 to rotate by controlling the output end 6. The arm shaft 7 is installed in the four directions of the joint 4. The assembled blades 3 will be directly installed on the arm shaft 7 to fix them. When assembling, first put the second blade 12 vertically, and then the installation steps of the upper and lower first blades 11 are the same, insert the bottom block 15 of the first blade 11 The retractable side bolts 16 on both sides are squeezed inward. The retractable side bolts 16 are spring columns and are retractable. After being squeezed inward, the retractable side bolts 16 will fit with the sides of the plug block 15, and then the plug block 15 will be directly inserted into the slot 17 of the second blade 12. The retractable side bolts 16 on both sides of the plug block 15 that enter the slot 17 will pop out directly from the side holes 13, and then the side caps 14 can be tightened with threads to fix them. After the upper and lower parts are assembled, the installation of the blade 3 is completed, and the entire installation procedure is simple.
[0039] 2. Although the No. 2 leaf 12 has an inner chamber 20 and a part of it is hollow, the actual weight of the No. 2 leaf 12 is the same as that of the No. 1 leaf 12, so it will not affect the use. The radar sensor 24 on the front side of the No. 2 leaf 12 is used to sense in real time whether there are birds approaching the surrounding area. When a bird is sensed approaching, a start signal will be transmitted to the spray pump 22 in the inner chamber through the built-in MCU. After receiving the signal, the spray pump 22 will suck the bird repellent from the solution tank 23 and spray it to the outside from the spray hole 19 through the nozzle 21, so as to drive away the approaching birds and prevent them from affecting normal flight.
[0040] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.
[0041] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.
Claims
1. A tail rotor for providing backward thrust for a helicopter, comprising a wing (1), a blade (3), a first blade (11) and a second blade (12), characterized in that: A reducer (5) is installed on the front of the wing (1), and the front of the reducer (5) is connected to the output end (6) in a transmission manner. The front of the output end (6) is clamped with a connector (4), and the back of the connector (4) is provided with a round head interface (8). The round head interface (8) and the end of the output end (6) are adapted to each other. The blade (3) is composed of a first blade (11) and a second blade (12). The top and bottom of the blade (3) are the first blade (11), and the middle of the blade (3) is the second blade (12). An inner chamber (20) is provided in the middle of the second blade (12), and a solution tank (23) is clamped inside the inner chamber (20). A liquid spray pump (22) is installed at the top of the solution tank (23), and a nozzle (21) is connected to the top of the liquid spray pump (22).
2. A tail rotor for providing backward thrust to a helicopter according to claim 1, characterized in that: Connecting arms (2) are installed on both sides, top and bottom of the joint (4), one end of the connecting arm (2) is threadedly connected to an arm shaft (7), and mounting hoops (9) are embedded on the top, middle and bottom of the front of the blade (3).
3. A tail rotor for providing backward thrust to a helicopter according to claim 2, characterized in that: The top, middle and bottom of the front side of the arm shaft (7) are all provided with through holes (18), and a threaded locking bolt (10) passes through between the mounting hoop (9) and the arm shaft (7).
4. A tail rotor for providing backward thrust to a helicopter according to claim 1, characterized in that: The bottom end of the first leaf (11) is provided with an insert block (15), the insert block (15) and the first leaf (11) are integrated, both sides of the first leaf (11) are connected with retractable side bolts (16), and the outer sides of the retractable side bolts (16) are threadedly connected with side caps (14).
5. A tail rotor for providing backward thrust to a helicopter according to claim 4, characterized in that: The top and bottom of the second leaf (12) are both provided with slots (17), the slots (17) and the inserts (15) are adapted to each other, side holes (13) are provided on both sides of the slots (17), the retractable side bolts (16) pass through the side holes (13), and the retractable side bolts (16) and the side holes (13) are adapted to each other.
6. The tail rotor for providing backward thrust to a helicopter according to claim 1, characterized in that: A radar sensor (24) is installed on one side of the front face of the second leaf (12), and a spray hole (19) is opened on the other side of the front face of the second leaf (12).
7. A tail rotor for providing backward thrust to a helicopter according to claim 6, characterized in that: One end of the nozzle (21) is clamped with the inner side of the nozzle hole (19).