CN111776211A - Tail rotor transmission system and unmanned helicopter - Google Patents
Tail rotor transmission system and unmanned helicopter Download PDFInfo
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- CN111776211A CN111776211A CN202010754295.7A CN202010754295A CN111776211A CN 111776211 A CN111776211 A CN 111776211A CN 202010754295 A CN202010754295 A CN 202010754295A CN 111776211 A CN111776211 A CN 111776211A
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- tail
- tail rotor
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- rotating shaft
- frame
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 51
- 230000007246 mechanism Effects 0.000 claims abstract description 33
- 238000005452 bending Methods 0.000 claims abstract description 28
- 230000007480 spreading Effects 0.000 claims abstract description 4
- 238000005096 rolling process Methods 0.000 claims description 9
- 230000001360 synchronised effect Effects 0.000 abstract description 23
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 1
- 235000011613 Pinus brutia Nutrition 0.000 description 1
- 241000018646 Pinus brutia Species 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000004308 accommodation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000035899 viability Effects 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C27/00—Rotorcraft; Rotors peculiar thereto
- B64C27/82—Rotorcraft; Rotors peculiar thereto characterised by the provision of an auxiliary rotor or fluid-jet device for counter-balancing lifting rotor torque or changing direction of rotorcraft
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D35/00—Transmitting power from power plants to propellers or rotors; Arrangements of transmissions
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Aviation & Aerospace Engineering (AREA)
- Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
Abstract
The invention relates to the technical field of unmanned helicopters, and discloses a tail rotor transmission system and an unmanned helicopter. The tail rotor transmission system includes: a frame; the tail mechanism comprises a tail rotor wing assembly, is rotatably connected with the rack, and can rotate upwards to a bending state relative to the rack and also rotate downwards to a spreading state relative to the rack; the main shaft is arranged on the frame and is used for connecting the main rotor; and the driving belt mechanism comprises a driving belt wheel, a driven belt wheel and a synchronous belt, the synchronous belt is tensioned on the driving belt wheel and the driven belt wheel, the driving belt wheel is connected with the spindle in a transmission manner, and the driven belt wheel is connected with the tail rotor wing assembly in a transmission manner. The tail rotor wing transmission system provided by the invention not only can be folded up and is convenient to transport, but also the synchronous belt is convenient to disassemble and assemble.
Description
Technical Field
The invention relates to the technical field of unmanned helicopters, in particular to a tail rotor transmission system and an unmanned helicopter.
Background
The pilotless helicopter is a vertical take-off and landing unmanned aircraft flying by radio ground remote control and autonomous control, belongs to a rotor aircraft in the structural form, and belongs to a vertical take-off and landing aircraft in the function. Compared with the existing helicopters, the unmanned helicopters have incomparable superiority in many aspects due to the characteristics of no casualties, small volume, low cost, strong battlefield viability and the like.
The traditional single-rotor tail-rotor unmanned helicopter overcomes the reaction torque generated by the main rotor through the rear tail rotor, the force provided by the tail rotor is small, and the force arm, namely the distance between the tail rotor and the main rotor, needs to be lengthened to overcome the reaction torque, so that the size of the helicopter body is increased, and the transportation of the unmanned helicopter is inconvenient.
In order to solve the problem, most of the existing solutions adopt a detachable tail pipe design, the detachable tail pipe design is mainly used for a shaft-driven tail rotor, and a belt-driven tail rotor is complex in structure and difficult to detach, so that the detachable tail pipe is not suitable for the scheme.
How to solve the above problems is a technical problem to be solved by those skilled in the art.
Disclosure of Invention
Based on the above, the invention aims to provide a tail rotor transmission system and an unmanned helicopter, which can be folded up to facilitate transportation, and the synchronous belt is also convenient to disassemble and assemble.
In order to achieve the purpose, the invention adopts the following technical scheme:
a tail rotor drive system comprising:
a frame;
the tail mechanism comprises a tail rotor wing assembly, is rotatably connected with the rack, and can rotate upwards to a bending state relative to the rack and also rotate downwards to a spreading state relative to the rack;
the main shaft is arranged on the frame and is used for connecting the main rotor; and
the drive belt mechanism comprises a drive belt wheel, a driven belt wheel and a synchronous belt, the synchronous belt is tensioned on the drive belt wheel and the driven belt wheel, the drive belt wheel is connected with the spindle in a transmission mode, and the driven belt wheel is connected with the tail rotor wing assembly in a transmission mode.
As a preferred embodiment of the tail rotor transmission system, the tail rotor transmission system further comprises:
the bending rotating shaft is fixedly connected to the rack, and the tail mechanism is rotatably connected with the bending rotating shaft.
As a preferred embodiment of the tail rotor drive system, the tail mechanism further includes:
the rear partition frame is rotationally connected with the bending rotating shaft; and
tail pipe, one end with the back is separated the frame and is connected, and the other end is equipped with the tail rotor subassembly, the hold-in range penetrates in the tail pipe, and with locate in the tail pipe driven pulley transmission is connected.
As an optimal scheme of a tail rotor transmission system, a rotating shaft bearing seat is arranged on the rear partition frame, a rolling bearing is sleeved on the bending rotating shaft, and the rolling bearing is arranged on the rotating shaft bearing seat.
As a preferable scheme of the tail rotor transmission system, a tension wheel is arranged on the machine frame, and the tension wheel presses against the synchronous belt.
As a preferable mode of the tail rotor transmission system, the tension pulley is slidably connected to the frame in a thickness direction of the timing belt, and the tension pulley can be fixed to the frame.
As a preferable scheme of the tail rotor transmission system, two tensioning wheels are provided, the two tensioning wheels are respectively provided at two sides of the synchronous belt, and the two tensioning wheels respectively press against the synchronous belt from the outer side of the synchronous belt inwards.
As a preferred embodiment of the tail rotor transmission system, the tail rotor transmission system further comprises:
the first fixing piece is used for fixedly connecting the rack and the tail mechanism in a bending state.
As a preferred embodiment of the tail rotor transmission system, the tail rotor transmission system further comprises:
and the second fixing piece is used for fixedly connecting the rack and the tail mechanism in an unfolding state.
Still provide an unmanned helicopter, include above the tail rotor transmission system.
The invention has the beneficial effects that:
the tail rotor transmission system comprises a rack and a tail mechanism which can rotate relatively, when the tail rotor transmission system needs to be transported, the tail mechanism is rotated upwards relative to the rack to be in a bending state and is fixed, the occupied area required by transporting the tail rotor transmission system is saved, and meanwhile, as the central distance between a driving belt wheel and a driven belt wheel is reduced in the bending state, the tension force borne by a synchronous belt is reduced, so that the tail rotor transmission system is convenient to disassemble and assemble; in the same way, when tail rotor transmission system needs to be switched to the expansion state, the synchronous belt sleeve is only required to be arranged on the driving belt wheel and the driven belt wheel, and is assisted to limit, the tail rotor transmission system is switched to the expansion state, the synchronous belt is tensioned along with the increase of the central distance between the driving belt wheel and the driven belt wheel, and therefore the disassembly and the installation efficiency of the synchronous belt are improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.
FIG. 1 is a schematic structural view of a tail rotor drive system according to the present invention in a bent state;
FIG. 2 is a schematic structural view of a tail rotor drive system provided by the present invention in a deployed state;
fig. 3 is an enlarged schematic view of region a in fig. 2.
In the figure:
1. a frame; 21. a tail rotor assembly; 22. a rear bulkhead; 23. a tail pipe; 3. a main shaft; 41. a driving pulley; 42. a synchronous belt; 5. bending the rotating shaft; 6. a rotating shaft bearing seat; 7. a tension wheel; 8. a bearing block; 9. a rolling bearing.
Detailed Description
In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1-3, this embodiment provides a tail rotor transmission system, which includes a rack 1, a tail mechanism, a main shaft 3 and a transmission belt mechanism, where the tail mechanism includes a tail rotor assembly 21, the tail mechanism is rotatably connected to the rack 1, the tail mechanism can rotate upward to a bending state relative to the rack 1, and can also rotate downward to a spreading state relative to the rack 1, the main shaft 3 is installed on the rack 1 and is used to connect a main rotor, the transmission belt mechanism includes a driving pulley 41, a driven pulley and a synchronous belt 42, the synchronous belt 42 is tensioned on the driving pulley 41 and the driven pulley, the driving pulley 41 is in transmission connection with the main shaft 3, and the driven pulley is in transmission connection with the tail rotor assembly 21.
Specifically, when the tail rotor transmission system needs to be transported, the tail mechanism is rotated upwards relative to the rack 1 to a bending state and is fixed, so that the occupied area required for transporting the tail rotor transmission system is saved, and meanwhile, as the central distance between the driving pulley 41 and the driven pulley is reduced in the bending state, the tension force applied to the synchronous belt 42 is reduced, so that the tail rotor transmission system is convenient to disassemble; in the same way, when tail rotor transmission system needs to be switched to the expansion state, only need locate drive pulley 41 and driven pulley with hold-in range 42 cover on to assist with spacingly, tail rotor transmission system is switching to the in-process of expansion state, hold-in range 42 along with drive pulley 41 and driven pulley's the increase of center distance and tensioning, therefore hold-in range 42's dismantlement and installation effectiveness all can promote by a wide margin.
Alternatively, the driving pulley 41 and the driven pulley are both gears, and the timing belt 42 is a flexible rack.
Alternatively, in the unwound state, the rotational axes of the driving pulley 41 and the driven pulley are parallel to each other.
Preferably, the outer diameter of the driving pulley 41 is larger than the outer diameter of the driven pulley.
Optionally, as shown in fig. 1, the tail rotor transmission system further includes a bending rotating shaft 5, the bending rotating shaft 5 is fixedly connected to the rack 1, and the tail mechanism is rotatably connected to the bending rotating shaft 5.
Optionally, as shown in fig. 1 and fig. 2, the tail mechanism further includes a rear bulkhead 22 and a tail pipe 23, the rear bulkhead 22 is rotatably connected to the bending rotating shaft 5, one end of the tail pipe 23 is connected to the rear bulkhead 22, the other end of the tail pipe 23 is provided with a tail rotor assembly 21, the tail pipe 23 is a hollow tubular structure, and the synchronous belt 42 penetrates through the tail pipe 23 and is in transmission connection with a driven pulley arranged in the tail pipe 23.
Further, as shown in fig. 3, a rotating shaft bearing seat 6 is arranged on the rear bulkhead 22, a rolling bearing 9 is sleeved on the bent rotating shaft 5, and the rolling bearing 9 is arranged on the rotating shaft bearing seat 6. Preferably, the rolling bearing 9 is a deep groove ball bearing. Preferably, the number of the rotating shaft bearing seats 6 is two, and the two rotating shaft bearing seats 6 are rotatably connected with the bending rotating shaft 5 through rolling bearings 9.
Optionally, the tail rotor assembly 21 includes a tail rotor and a gear box, wherein the tail rotor is mounted on an output shaft of the gear box, the driven pulley is in transmission connection with an input shaft of the gear box, and an output shaft of the gear box is perpendicular to the input shaft of the gear box, that is, a rotation axis of the tail rotor is perpendicular to a rotation axis of the main rotor.
Preferably, as shown in fig. 3, a tension pulley 7 is provided on the frame 1, and the tension pulley 7 is pressed against the timing belt 42.
Preferably, as shown in fig. 3, the tension pulley 7 is slidably connected to the frame 1 in the thickness direction of the timing belt 42, and the tension pulley 7 can be fixed to the frame 1. Particularly, all be equipped with bearing block 8 between the both ends of take-up pulley 7's axis of rotation and the frame 1, be equipped with first waist shape hole on the bearing block 8, frame 1 is equipped with second waist shape hole on the position that corresponds the mounting hole, and the extending direction in first waist shape hole and second waist shape hole all is the same with hold-in range 42's thickness direction, and the axis of rotation of take-up pulley 7 is connected with frame 1 through the bolt and nut structure of wearing to locate first waist shape hole and second waist shape hole. When the tensioning dynamics of drive belt mechanism need be adjusted, only need to take off bolt and nut structure and frame 1 pine, then remove take-up pulley 7 to corresponding position along the extending direction in first waist shape hole and second waist shape hole to lock take-up pulley 7 and frame 1 through bolt and nut structure again, can realize the adjustment of tensioning dynamics, accommodation process is simple high-efficient.
Optionally, as shown in fig. 3, two tensioning wheels 7 are provided, the two tensioning wheels 7 are respectively provided at two sides of the synchronous belt 42, and the two tensioning wheels 7 respectively press against the synchronous belt 42 from the outer side of the synchronous belt 42 to make the tensioning force applied to the synchronous belt 42 more balanced.
Optionally, the tail rotor transmission system further comprises a first fixing member, the first fixing member is used for fixedly connecting the rack 1 and the tail mechanism in the bending state, and the tail mechanism in the bending state is prevented from falling off due to rotation relative to the rack 1 and causing damage to the tail rotor transmission system or injury to workers.
Preferably, the first fixing member is in a bolt and nut structure or a buckle structure.
Optionally, the tail rotor transmission system further includes a second fixing member, and the second fixing member is used to fixedly connect the rack 1 in the deployed state and the tail mechanism, so as to improve stability of the tail mechanism in the deployed state relative to the rack 1.
Preferably, the second fixing part adopts a bolt and nut structure or a buckle structure.
The embodiment also provides an unmanned helicopter, including foretell tail rotor transmission system, still include main rotor, motor, fuselage and control and navigation, wherein main rotor installs on main shaft 3, and the output and the 3 transmission of main shaft of motor are connected, and the fuselage wraps up in frame 1 outside and is connected with frame 1, and control and navigation locate in the fuselage. It should be noted that the control and navigation system of the unmanned helicopter is a control system for realizing autonomous attitude stabilization, flight course flight and other tasks of the unmanned helicopter, belongs to the mature prior art, and is not described herein again.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. A tail rotor drive system, comprising:
a frame (1);
the tail mechanism comprises a tail rotor assembly (21), the tail mechanism is rotatably connected with the rack (1), and the tail mechanism can rotate upwards to a bending state relative to the rack (1) and also can rotate downwards to a spreading state relative to the rack (1);
the main shaft (3) is arranged on the frame (1) and is used for connecting a main rotor wing; and
drive belt mechanism, including driving pulley (41), driven pulley and hold-in range (42), hold-in range (42) tensioning in driving pulley (41) with on the driven pulley, driving pulley (41) with main shaft (3) transmission is connected, driven pulley with tail rotor subassembly (21) transmission is connected.
2. The tail rotor drive system according to claim 1, further comprising:
the bending mechanism comprises a bending rotating shaft (5), the bending rotating shaft (5) is fixedly connected to the rack (1), and the tail mechanism is rotatably connected with the bending rotating shaft (5).
3. The tail rotor drive system according to claim 2, wherein the tail mechanism further comprises:
the rear bulkhead frame (22) is rotationally connected with the bending rotating shaft (5); and
tail pipe (23), one end with back bulkhead (22) are connected, and the other end is provided with tail rotor subassembly (21), hold-in range (42) penetrate in tail pipe (23), and with locate in tail pipe (23) driven pulley transmission is connected.
4. The tail rotor transmission system according to claim 3, wherein a rotating shaft bearing seat (6) is arranged on the rear bulkhead (22), a rolling bearing (9) is sleeved on the bending rotating shaft (5), and the rolling bearing (9) is arranged on the rotating shaft bearing seat (6).
5. A tail rotor drive system according to claim 1, wherein a tension pulley (7) is provided on the frame (1), the tension pulley (7) pressing against the timing belt (42).
6. The tail rotor drive system according to claim 5, wherein the tension pulley (7) is slidably connected to the frame (1) in a thickness direction of the timing belt (42), and the tension pulley (7) is fixable to the frame (1).
7. The tail rotor drive system according to claim 5, wherein two tension pulleys (7) are provided, two tension pulleys (7) are provided on both sides of the timing belt (42), and the two tension pulleys (7) are pressed inward against the timing belt (42) from the outside of the timing belt (42).
8. A tail rotor drive system according to any one of claims 1-7, further comprising:
the first fixing piece is used for fixedly connecting the rack (1) and the tail mechanism in a bending state.
9. A tail rotor drive system according to any one of claims 1-7, further comprising:
and the second fixing piece is used for fixedly connecting the rack (1) and the tail mechanism in an unfolded state.
10. An unmanned helicopter comprising a tail rotor drive system according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010754295.7A CN111776211A (en) | 2020-07-30 | 2020-07-30 | Tail rotor transmission system and unmanned helicopter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010754295.7A CN111776211A (en) | 2020-07-30 | 2020-07-30 | Tail rotor transmission system and unmanned helicopter |
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| Publication Number | Publication Date |
|---|---|
| CN111776211A true CN111776211A (en) | 2020-10-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010754295.7A Pending CN111776211A (en) | 2020-07-30 | 2020-07-30 | Tail rotor transmission system and unmanned helicopter |
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| Country | Link |
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| CN (1) | CN111776211A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116923753A (en) * | 2023-09-13 | 2023-10-24 | 四川腾盾科技有限公司 | Unmanned helicopter transmission system and use method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6050521A (en) * | 1997-08-01 | 2000-04-18 | Finmeccanica S.P.A | Releasable coupling for a helicopter tail rotor power transmission line |
| KR20110121232A (en) * | 2010-04-30 | 2011-11-07 | 경북대학교 산학협력단 | An unmanned helicopter for spraying chemical |
| CN202270360U (en) * | 2011-09-29 | 2012-06-13 | 深圳市沈氏彤创航天模型有限公司 | Tail rotor transmission device for simulation remote control helicopter model |
| US20120298792A1 (en) * | 2009-12-02 | 2012-11-29 | Per-Erik Cardell | Dismountable helicopter |
| CN106927036A (en) * | 2017-02-28 | 2017-07-07 | 中航维拓（天津）科技有限公司 | A kind of dynamic four rotor wing unmanned aerial vehicles at a high speed of folding combined type oil |
| CN110550201A (en) * | 2019-10-14 | 2019-12-10 | 贾伟杰 | Control system and three rotor unmanned aerial vehicle of oil-drive that ball cage universal joint constitutes |
| CN210364376U (en) * | 2019-07-15 | 2020-04-21 | 天津宏泽天成科技有限公司 | Tail rotor transmission structure of unmanned helicopter |
| CN212797309U (en) * | 2020-07-30 | 2021-03-26 | 天津曙光天成科技有限公司 | Tail rotor transmission system and unmanned helicopter |
-
2020
- 2020-07-30 CN CN202010754295.7A patent/CN111776211A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6050521A (en) * | 1997-08-01 | 2000-04-18 | Finmeccanica S.P.A | Releasable coupling for a helicopter tail rotor power transmission line |
| US20120298792A1 (en) * | 2009-12-02 | 2012-11-29 | Per-Erik Cardell | Dismountable helicopter |
| KR20110121232A (en) * | 2010-04-30 | 2011-11-07 | 경북대학교 산학협력단 | An unmanned helicopter for spraying chemical |
| CN202270360U (en) * | 2011-09-29 | 2012-06-13 | 深圳市沈氏彤创航天模型有限公司 | Tail rotor transmission device for simulation remote control helicopter model |
| CN106927036A (en) * | 2017-02-28 | 2017-07-07 | 中航维拓（天津）科技有限公司 | A kind of dynamic four rotor wing unmanned aerial vehicles at a high speed of folding combined type oil |
| CN210364376U (en) * | 2019-07-15 | 2020-04-21 | 天津宏泽天成科技有限公司 | Tail rotor transmission structure of unmanned helicopter |
| CN110550201A (en) * | 2019-10-14 | 2019-12-10 | 贾伟杰 | Control system and three rotor unmanned aerial vehicle of oil-drive that ball cage universal joint constitutes |
| CN212797309U (en) * | 2020-07-30 | 2021-03-26 | 天津曙光天成科技有限公司 | Tail rotor transmission system and unmanned helicopter |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116923753A (en) * | 2023-09-13 | 2023-10-24 | 四川腾盾科技有限公司 | Unmanned helicopter transmission system and use method |
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Effective date of registration: 20221010 Address after: Room 105, Building 9, Area B3 (formerly Area 2 of Ronghui Business Park), Enterprise Headquarters Base, Binhai-Zhongguancun Science and Technology Park, Economic and Technological Development Zone, Binhai New Area, Tianjin 300457 Applicant after: Tianjin Phoenix Intelligent Technology Co.,Ltd. Address before: Floor 1, block B, No.3, Tengfei Road, Junliang City, Dongli District, Tianjin Applicant before: TIANJIN SHUGUANG TIANCHENG TECHNOLOGY Co.,Ltd. |