CN204507267U - A kind of tail-rotor distance changing mechanism of depopulated helicopter - Google Patents
A kind of tail-rotor distance changing mechanism of depopulated helicopter Download PDFInfo
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- CN204507267U CN204507267U CN201520193392.8U CN201520193392U CN204507267U CN 204507267 U CN204507267 U CN 204507267U CN 201520193392 U CN201520193392 U CN 201520193392U CN 204507267 U CN204507267 U CN 204507267U
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Abstract
A tail-rotor distance changing mechanism for depopulated helicopter, it is made up of bearing seat, steering wheel, displacement slide block, universal spindle nose A, pitch-change-link, universal spindle nose B, steering wheel, belt wheel, screw hole, transmission shaft, fixed screw holes, steering wheel auricle and tail-rotor rocking arm; Bearing seat is connected by screw with tail boom, and transmission shaft and belt wheel are connected, and the V belt translation that the power input of transmission shaft is formed by belt and belt wheel realizes; Steering wheel auricle is connected by screw with bearing seat, and steering wheel is connected by steering wheel screw with steering wheel, and steering wheel is connected by universal spindle nose B with the end of pitch-change-link; Displacement slide block is connected by bearing with tail rotor driving shafts, and one end of pitch-change-link is connected by universal spindle nose A with displacement slide block, thus achieves the connection of steering wheel and displacement slide block; Displacement slide block and tail-rotor rocking arm adopt circumference to be rotatably connected.The tail-rotor structure design that the utility model makes accident rate very high is optimized, and alleviates architecture quality, and connection reliability strengthens, and is the prioritization scheme of tail-rotor transmission.
Description
Technical field
The utility model relates to depopulated helicopter part design, particularly relates to a kind of tail-rotor distance changing mechanism of depopulated helicopter, belongs to aviation aircraft design field.
Background technology
Depopulated helicopter is generally used for aviation target, battlefield investigation, injures the military mission such as assessment, target guide, also can be used for the non-military task such as flight test, aerial mapping simultaneously.Comparatively fixed wing aircraft, depopulated helicopter has the functions such as hovering, vertical takeoff and landing, can execute the task more flexibly.Because the rotor load of depopulated helicopter is limited, therefore have very high requirement for housing construction, not only claimed structure quality is light, also to have reliable transmission and driving efficiency high.
Structure and the rotor of helicopter tail rotor are similar (except No Tail Rotor technology), are positioned on tail boom, for the balancing helicopter rotor moment of reaction, the parts ensureing helicopter direction control and stability.Lifting airscrew can produce lift in rotary course, also can produce the moment of torsion perpendicular to plane of rotation simultaneously, in order to ensure trim moment of torsion, needs to increase tail-rotor to provide reciprocal moment of torsion.The attitude of tail-rotor by providing the moment of torsion of variable size can control helicopter body simultaneously is also the important component part ensureing helicopter directional control and stability.
Because the power of tail-rotor is generally from the sustainer, main engine of helicopter, the main method therefore controlling tail-rotor amount of force is exactly the pitch changing screw propeller, i.e. displacement.The development of this type of aircraft at present is also in elementary development phase, design both at home and abroad for depopulated helicopter tail-rotor displacement is also very different, mostly general depopulated helicopter tail-rotor displacement is to adopt the drive mechanism of many parts to be delivered on pitch-change-link by the actuating force of steering wheel, finally passes to tail-rotor again.The direct result that such design causes is exactly that its architecture quality increases, and too much drive joint can cause the reliability of transmission to reduce.In the accident investigation of helicopter, the accident caused due to tail-rotor system reaches in helicopter fuselage/system failure 32%, and wherein the accident rate of tail rotor driving shafts is 18%, and tail-rotor accident rate is 14%.Therefore can find out that the design of a set of failure-free tail-rotor is the key ensureing flight safety.
The key of depopulated helicopter tail-rotor design is the design of optimization on drive path and junction, and the drive mechanism of general depopulated helicopter often complex structure on drive path, and be attended by the problem that point of connection is many, if in use misoperation is easy to cause problem.This project namely for these problems, have developed one more simply, reliably tail-rotor driving system, achieve good effect.
Utility model content
1. the technical matters that will solve
Traditional depopulated helicopter tail-rotor design adopts " L " type drive mechanism, its complex structure and also point of connection many, architecture quality is large, and transmission efficiency is not high, and Fig. 1 is the tail-rotor transmission diagram of drive mechanism.The purpose of this utility model is the tail-rotor distance changing mechanism providing a kind of depopulated helicopter, and it makes the connection of steering wheel and tail-rotor simplify, to improve the problems referred to above.
2. the technical scheme adopted
The utility model mainly by bearing seat and tail-rotor pitch-change-link appropriate design realize.
The technical scheme that the utility model is specifically implemented below is described: the tail-rotor distance changing mechanism of a kind of depopulated helicopter of the utility model, it is made up of bearing seat (1), steering wheel (2), displacement slide block (3), universal spindle nose A (4), pitch-change-link (5), universal spindle nose B (6) steering wheel (7), belt wheel (8), screw hole (9), transmission shaft (10), fixed screw holes (11), steering wheel auricle (12), tail-rotor rocking arm (13).Position annexation between them is: bearing seat (1) is connected by screw with tail boom, transmission shaft (10) and belt wheel (8) are connected, and the V belt translation that the power input of transmission shaft (10) is formed by belt and belt wheel (8) realizes; Steering wheel auricle (12) is connected by screw with bearing seat (1), steering wheel (2) is connected by steering wheel screw with steering wheel (7), and steering wheel (7) is connected by universal spindle nose B (6) with the end of pitch-change-link (5); Displacement slide block (3) is connected by bearing with tail rotor driving shafts (10), one end of pitch-change-link (5) is connected by universal spindle nose A (4) with displacement slide block (3), thus achieves the connection of steering wheel (2) and displacement slide block (3); Displacement slide block (3) and tail-rotor rocking arm (13) adopt circumference to be rotatably connected.
Such design makes the manipulation drive mechanism from steering wheel (2) to tail-rotor simple and reliable, eliminate " L " type distance changing mechanism in conventional confguration, the substitute is and utilize pitch-change-link (5) directly to promote displacement slide block (3), and on bearing seat (1), have the cross travel that groove can limit pitch-change-link (5), framing member is few, architecture quality obviously reduces, and achieves simplification.
3. beneficial effect
The utility model has the advantage of:
1) positional distance tail-rotor rocking arm nearer of steering wheel, makes transmission more simple, reliable like this;
2) design of distance-variable rocker arm simplifies the part transmission of tail-rotor drive mechanism complexity in the past, utilizes the cross spacing of bearing seat that the part displacement constraint originally needing multiple part to complete is simplified;
3) structure design simplified makes the structure design at the tail-rotor structure place that accident rate is very high originally be optimized, and alleviating the architecture quality of its tail-rotor part, and connection reliability is strengthened, is the prioritization scheme of tail-rotor transmission.
Accompanying drawing explanation
Fig. 1 tail-rotor connecting overall axonometric drawing a.
Fig. 2 tail-rotor connecting overall axonometric drawing b.
Fig. 3 drive mechanism sketch.
In figure, nomenclature is as follows:
1, bearing seat; 2, steering wheel; 3, displacement slide block; 4, universal spindle nose A; 5, pitch-change-link; 6, universal spindle nose B; 7, steering wheel; 8, belt wheel; 9, screw hole; 10, transmission shaft; 11, fixed screw holes; 12, steering wheel auricle; 13, tail-rotor rocking arm.
Detailed description of the invention
See Fig. 1-Fig. 3, the tail-rotor distance changing mechanism of a kind of depopulated helicopter of the utility model, it is made up of bearing seat (1), steering wheel (2), displacement slide block (3), universal spindle nose A (4), pitch-change-link (5), universal spindle nose B (6) steering wheel (7), belt wheel (8), screw hole (9), transmission shaft (10), fixed screw holes (11), steering wheel auricle (12), tail-rotor rocking arm (13).Between them for putting annexation be: bearing seat (1) is connected by screw with tail boom, transmission shaft (10) and belt wheel (8) are connected, and the V belt translation that the power input of transmission shaft (10) is formed by belt and belt wheel (8) realizes; Steering wheel auricle (12) is connected by screw with bearing seat (1), steering wheel (2) is connected by steering wheel screw with steering wheel (7), and steering wheel (7) is connected by universal spindle nose B (6) with the end of pitch-change-link (5); Displacement slide block (3) is connected by bearing with tail rotor driving shafts (10), one end of pitch-change-link (5) is connected by universal spindle nose A (4) with displacement slide block (3), thus achieves the connection of steering wheel (2) and displacement slide block (3); Displacement slide block (3) and tail-rotor rocking arm (13) adopt circumference to be rotatably connected.
Below by example, embodiment of the present utility model is described:
In the displacement of tail-rotor regulates, steering wheel (2) can be handled steering wheel (7) deflection according to control signal and rotate to an angle, steering wheel (7) makes pitch-change-link (5) axially produce displacement by universal spindle nose B (6), and the cross travel that pitch-change-link (5) produces limited by spacing on bearing seat (1).The longitudinal travel of pitch-change-link (5) passes to displacement slide block (3) by universal spindle nose A (4) again, displacement slide block (3) is connected on transmission shaft (10) by bearing, and transmission shaft (10) can limit displacement slide block (3) and only move at the axial direction of transmission shaft (10).Displacement slide block (3) and tail-rotor rocking arm (13) adopt circumferential rotatable connection mode, finally the manipulation of steering wheel (2) can be passed to tail-rotor rocking arm (13), tail-rotor rocking arm (13) makes by rotating a certain angle it change the angle of attack and realizes tail-rotor displacement.
In small-sized depopulated helicopter design, apply above-mentioned technology, the tail-rotor structural rate in this aircraft was simplified in the past greatly, and in manufacturing process, installation process can shorten, and matching relationship is more easily assembled.In full machine, this design makes tail-rotor architecture quality alleviate, and trim center of gravity is simpler.In the process of working service, it is more convenient that such design maintenance gets up, and needs the place of smearing grease obviously to reduce, transmission optimized, and reliability strengthens.
Claims (1)
1. a tail-rotor distance changing mechanism for depopulated helicopter, is characterized in that: it is made up of bearing seat (1), steering wheel (2), displacement slide block (3), universal spindle nose A (4), pitch-change-link (5), universal spindle nose B (6), steering wheel (7), belt wheel (8), screw hole (9), transmission shaft (10), fixed screw holes (11), steering wheel auricle (12) and tail-rotor rocking arm (13); Bearing seat (1) is connected by screw with tail boom, transmission shaft (10) and belt wheel (8) are connected, steering wheel auricle (12) is connected by screw with bearing seat (1), steering wheel (2) is connected by steering wheel screw with steering wheel (7), and steering wheel (7) is connected by universal spindle nose B (6) with the end of pitch-change-link (5); Displacement slide block (3) is connected by bearing with tail rotor driving shafts (10), one end of pitch-change-link (5) is connected by universal spindle nose A (4) with displacement slide block (3), and displacement slide block (3) and tail-rotor rocking arm (13) adopt circumference to be rotatably connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520193392.8U CN204507267U (en) | 2015-04-01 | 2015-04-01 | A kind of tail-rotor distance changing mechanism of depopulated helicopter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520193392.8U CN204507267U (en) | 2015-04-01 | 2015-04-01 | A kind of tail-rotor distance changing mechanism of depopulated helicopter |
Publications (1)
| Publication Number | Publication Date |
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| CN204507267U true CN204507267U (en) | 2015-07-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520193392.8U Expired - Fee Related CN204507267U (en) | 2015-04-01 | 2015-04-01 | A kind of tail-rotor distance changing mechanism of depopulated helicopter |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104843183A (en) * | 2015-04-01 | 2015-08-19 | 天峋创新（北京）科技有限公司 | Tail rotor pitch structure of unmanned helicopter |
| CN106081102A (en) * | 2016-08-11 | 2016-11-09 | 深圳天鹰兄弟无人机创新有限公司 | A kind of unmanned plane and bar thick stick formula tail-rotor distance changing mechanism thereof |
-
2015
- 2015-04-01 CN CN201520193392.8U patent/CN204507267U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104843183A (en) * | 2015-04-01 | 2015-08-19 | 天峋创新（北京）科技有限公司 | Tail rotor pitch structure of unmanned helicopter |
| CN106081102A (en) * | 2016-08-11 | 2016-11-09 | 深圳天鹰兄弟无人机创新有限公司 | A kind of unmanned plane and bar thick stick formula tail-rotor distance changing mechanism thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150729 Termination date: 20170401 |