CN112623212A - Unmanned aerial vehicle screw displacement device - Google Patents
Unmanned aerial vehicle screw displacement device Download PDFInfo
- Publication number
- CN112623212A CN112623212A CN202011598648.5A CN202011598648A CN112623212A CN 112623212 A CN112623212 A CN 112623212A CN 202011598648 A CN202011598648 A CN 202011598648A CN 112623212 A CN112623212 A CN 112623212A
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- CN
- China
- Prior art keywords
- ball bearing
- aerial vehicle
- unmanned aerial
- paddle
- triangular block
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000006073 displacement reaction Methods 0.000 title claims description 5
- 230000005540 biological transmission Effects 0.000 claims abstract description 37
- 230000033001 locomotion Effects 0.000 claims abstract description 19
- 239000004519 grease Substances 0.000 claims description 5
- 238000005299 abrasion Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 9
- 239000007787 solid Substances 0.000 description 8
- 241000143392 Oar Species 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000005096 rolling process Methods 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C27/00—Rotorcraft; Rotors peculiar thereto
- B64C27/54—Mechanisms for controlling blade adjustment or movement relative to rotor head, e.g. lag-lead movement
- B64C27/58—Transmitting means, e.g. interrelated with initiating means or means acting on blades
- B64C27/59—Transmitting means, e.g. interrelated with initiating means or means acting on blades mechanical
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C11/00—Propellers, e.g. of ducted type; Features common to propellers and rotors for rotorcraft
- B64C11/30—Blade pitch-changing mechanisms
- B64C11/32—Blade pitch-changing mechanisms mechanical
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64U—UNMANNED AERIAL VEHICLES [UAV]; EQUIPMENT THEREFOR
- B64U10/00—Type of UAV
- B64U10/10—Rotorcrafts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64U—UNMANNED AERIAL VEHICLES [UAV]; EQUIPMENT THEREFOR
- B64U30/00—Means for producing lift; Empennages; Arrangements thereof
- B64U30/20—Rotors; Rotor supports
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Aviation & Aerospace Engineering (AREA)
- Remote Sensing (AREA)
- Motor Power Transmission Devices (AREA)
Abstract
The invention provides a propeller pitch changing device of an unmanned aerial vehicle, which comprises: the transmission triangular block, the right-angle ball bearing and the paddle root fixing ring; the side wall of the transmission triangular block is provided with a mounting hole; the bearing end of the right-angle ball bearing is a deep groove ball bearing, the bearing end of the right-angle ball bearing is fixedly connected with the inner ring of the deep groove ball bearing, and the outer ring of the deep groove ball bearing is embedded in the mounting hole; the right-angle ball bearing makes 360-degree rotary motion in the transmission triangular block; the number of the right-angle ball bearings corresponds to that of the paddle root fixing rings, and the paddle root fixing rings are fixed on the right-angle ball bearings; and the paddle root fixing ring is used for fixing a paddle. The invention provides a propeller pitch changing device of an unmanned aerial vehicle, which well solves the problem that the existing crank-slider mechanism has great abrasion of a slider after long-time operation, so that the maneuverability of the unmanned aerial vehicle is influenced.
Description
Technical Field
The invention relates to the technical field of unmanned aerial vehicle propellers, in particular to a propeller pitch changing device of an unmanned aerial vehicle.
Background
The variable pitch propeller is a propeller of which the attack angle of a blade can be changed according to the flight power requirement of an airplane when the unmanned aerial vehicle flies, the advancing speed is low during takeoff, and the blade angle of the propeller is reduced by the variable pitch device, so that the engine works in the state of maximum rotating speed and maximum power, and the propeller generates maximum pulling force; at cruising, the pitch device enables the pitch to be changed to a high pitch compatible with this flight regime, at which the propeller is able to draw the maximum useful power from the engine at maximum rotational speed. Therefore, the variable pitch propeller can utilize the maximum available power of the engine at any flight speed.
But present variable pitch propeller pitch device all adopts crank slider mechanism to transmit basically, and practice proves, the slider all can have very big wearing and tearing after crank slider mechanism runs for a long time, leads to the paddle angle of attack change little, and then influences unmanned aerial vehicle's mobility.
Disclosure of Invention
The invention provides a propeller pitch changing device of an unmanned aerial vehicle, and aims to solve the problem that after an existing crank-slider mechanism runs for a long time, a slider is greatly abraded, and the maneuverability of the unmanned aerial vehicle is further influenced.
The invention provides a propeller pitch changing device of an unmanned aerial vehicle, which comprises: the transmission triangular block, the right-angle ball bearing and the paddle root fixing ring; the side wall of the transmission triangular block is provided with a mounting hole; the bearing end of the right-angle ball bearing is a deep groove ball bearing, the bearing end of the right-angle ball bearing is fixedly connected with the inner ring of the deep groove ball bearing, and the outer ring of the deep groove ball bearing is embedded in the mounting hole; the right-angle ball bearing makes 360-degree rotary motion in the transmission triangular block; the number of the right-angle ball bearings corresponds to that of the paddle root fixing rings, and the paddle root fixing rings are fixed on the right-angle ball bearings; and the paddle root fixing ring is used for fixing a paddle.
Further, the number of the mounting holes is three; correspondingly, the number of the right-angle ball bearings is three.
Further, the right-angle ball bearing also comprises a bolt end; the paddle root fixing ring comprises a fixing ring body and a connecting part; one side of the fixed ring body is provided with a connecting part, and the other side of the fixed ring body is connected with the paddle; and the connecting part is internally provided with a thread matched with the bolt end, and the bolt end is in threaded connection with the connecting part.
Through threaded connection between the bolt end of right angle ball bearing and the connecting portion, can make up right angle ball bearing and the solid fixed ring combination of oar root integrative, when right angle ball bearing carries out rotary motion, and then drive the solid fixed ring motion of oar root, drive the motion of paddle at last, the angle of attack that can adjust the paddle through the motion of paddle changes, realizes the good mobility of unmanned aerial vehicle.
Further, the pitch changing device further comprises a guide shaft, and the guide shaft plays a role in guiding and supporting; the transmission triangular block is provided with a guide hole, and the guide shaft is sleeved in the guide hole.
The guide shaft is fixed in position, mainly plays a role in guiding and supporting the transmission triangular block, and can also play a role in limiting the transmission triangular block to only move up and down and axially rotate.
Furthermore, a power connecting rod is fixed on the upper top surface of the transmission triangular block; the power connecting rod drives the transmission triangular block to do up-and-down and rotary motion along the guide shaft.
Further, the bolt end is also provided with a locknut.
The effect that sets up lock nut lies in, plays the solid fixed ring's of locking right angle ball bearing and oar root effect, prevents that right angle ball bearing from driving the solid fixed ring of oar root when rotatory, owing to take place the condition of skidding and lead to influencing the problem of unmanned aerial vehicle mobility.
Further, lubricating grease is coated on the deep groove ball bearing.
The effect of providing grease is that friction of the bearing during movement can be reduced, improving the life and accuracy of the pitch device.
According to the propeller pitch changing device for the unmanned aerial vehicle, the right-angle ball bearing is connected with the transmission triangular block through the rolling ball bearing, so that the friction effect between the right-angle ball bearing and the transmission triangular block during movement can be reduced, and the wide-range change of the attack angle of the blade is realized. The device can adjust the paddle to provide tension for the unmanned aerial vehicle, so that the autonomous maneuvering performance of the unmanned aerial vehicle is greatly enhanced; fine solution current slider-crank mechanism long-time operation back slider can very big wearing and tearing, and then influence the problem of unmanned aerial vehicle mobility.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic structural diagram of a propeller pitch changing device of an unmanned aerial vehicle according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a transmission triangle provided in the embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a guide shaft according to an embodiment of the present invention;
FIG. 4 is a schematic view of the connection between the guide shaft and the transmission triangle block provided by the embodiment of the invention;
FIG. 5 is a schematic view of the connection between a right-angle ball bearing and a root fixing ring provided in the embodiment of the invention;
fig. 6 is a schematic structural diagram of a right-angle ball bearing provided in the embodiment of the present invention.
Description of reference numerals:
1 is a transmission triangular block, 11 is a mounting hole, and 12 is a guide hole; 2, a right-angle ball bearing, 21 a deep groove ball bearing, 22 a bolt end and 23 a locknut; 3 is a paddle root fixing ring, 31 is a fixing ring body, and 32 is a connecting part; and 4, a guide shaft.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all, embodiments of the present invention. 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.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. Furthermore, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1-6, the invention provides an unmanned aerial vehicle propeller pitch changing device, comprising: the device comprises a transmission triangular block 1, a right-angle ball bearing 2 and a paddle root fixing ring 3; the side wall of the transmission triangular block 1 is provided with a mounting hole 11; the bearing end of the right-angle ball bearing 2 is a deep groove ball bearing 21, the bearing end of the right-angle ball bearing 2 is fixedly connected with the inner ring of the deep groove ball bearing 21, and the outer ring of the deep groove ball bearing 21 is embedded in the mounting hole 11; the right-angle ball bearing 2 rotates 360 degrees in the transmission triangular block 1; the number of the right-angle ball bearings 2 corresponds to that of the paddle root fixing rings 3, and the paddle root fixing rings 3 are fixed on the right-angle ball bearings 2; and the paddle root fixing ring 3 is used for fixing a paddle.
Particularly, unmanned aerial vehicle screw displacement device includes transmission triangle piece 1 and guiding axle 4, guiding hole 12 has been seted up on the transmission triangle piece 1, guiding axle 4 cup joints in the guiding hole 12. The guide shaft 4 is fixed in position, mainly plays a role in guiding and supporting the transmission triangular block 1, and can also play a role in limiting the transmission triangular block 1 to only move up and down and axially rotate.
Further, a power connecting rod is fixed on the upper top surface of the transmission triangular block 1; the power connecting rod drives the transmission triangular block 1 to do up-and-down and rotary motion along the guide shaft 4.
Specifically, unmanned aerial vehicle screw displacement device still includes right angle ball bearing 2, right angle ball bearing 2 is installed around the transmission triangle piece 1, right angle ball bearing 2 includes bearing end and bolt end 22.
Further, the side wall of the transmission triangular block 1 is provided with three mounting holes 11, and the number of the mounting holes 11 is three; accordingly, the number of the right-angle ball bearings 2 is also three.
Further, the bearing end of the right-angle ball bearing 2 is a deep groove ball bearing 21, the bearing end of the right-angle ball bearing 2 is fixedly connected with the inner ring of the deep groove ball bearing 21, and the outer ring of the deep groove ball bearing 21 is embedded in the mounting hole 11.
The right-angle ball bearing 2 is connected with the transmission triangular block 1 through the deep groove ball bearing 21, so that the friction effect between the right-angle ball bearing 2 and the transmission triangular block 1 can be reduced during movement, and the wide-range change of the attack angle of the paddle is realized.
Further, the deep groove ball bearing 21 is coated with grease. The grease has the effect of reducing friction of the deep groove ball bearing 21 during movement, and improving the life and accuracy of the pitch control device.
Specifically, the propeller pitch-changing device of the unmanned aerial vehicle further comprises a propeller root fixing ring 3, wherein the propeller root fixing ring 3 comprises a fixing ring body 31 and a connecting part 32; one surface of the fixed ring body 31 is provided with a connecting part 32, and the other surface of the fixed ring body 31 is connected with the paddle; the connecting portion 32 is internally provided with threads matched with the bolt end 22, and the bolt end 22 is in threaded connection with the connecting portion 32.
Through threaded connection between the bolt end 22 of right angle ball bearing 2 and the connecting portion 32, can make up right angle ball bearing 2 and the solid fixed ring 3 of root integrative, when right angle ball bearing 2 carries out rotary motion, and then drive the solid fixed ring 3 motion of root, drive the motion of paddle at last, the angle of attack that can adjust the paddle through the motion of paddle changes, realizes the good mobility of unmanned aerial vehicle.
Further, the bolt end 22 is also provided with a locknut 23.
The effect that sets up lock nut 23 lies in, plays the solid fixed ring 3's of locking right angle ball bearing 2 and oar root effect, prevents that right angle ball bearing 2 from driving the solid fixed ring 3 of oar root when rotatory, owing to take place the condition of skidding and lead to influencing the problem of unmanned aerial vehicle mobility.
It should be noted that chinese patent No. CN103661927B discloses a variable pitch propeller of a fixed-wing aircraft, that is, how to control the performance of an unmanned aerial vehicle through the variable pitch propeller, which has been known in the prior art for a long time, and this application is not described in detail and is not equal to the insufficient disclosure of the specification.
Therefore, according to the propeller pitch varying device for the unmanned aerial vehicle, the right-angle ball bearing and the transmission triangular block are connected through the rolling ball bearing, so that the friction effect between the right-angle ball bearing and the transmission triangular block during movement can be reduced, and the wide-range change of the attack angle of the blade is realized. The device can adjust the paddle to provide tension for the unmanned aerial vehicle, so that the autonomous maneuvering performance of the unmanned aerial vehicle is greatly enhanced; fine solution current slider-crank mechanism long-time operation back slider can very big wearing and tearing, and then influence the problem of unmanned aerial vehicle mobility.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (7)
1. The utility model provides an unmanned aerial vehicle screw displacement device which characterized in that includes: the transmission triangular block, the right-angle ball bearing and the paddle root fixing ring;
the side wall of the transmission triangular block is provided with a mounting hole;
the bearing end of the right-angle ball bearing is a deep groove ball bearing, the bearing end of the right-angle ball bearing is fixedly connected with the inner ring of the deep groove ball bearing, and the outer ring of the deep groove ball bearing is embedded in the mounting hole;
the right-angle ball bearing makes 360-degree rotary motion in the transmission triangular block;
the number of the right-angle ball bearings corresponds to that of the paddle root fixing rings, and the paddle root fixing rings are fixed on the right-angle ball bearings;
and the paddle root fixing ring is used for fixing a paddle.
2. The unmanned aerial vehicle propeller pitch change device of claim 1, wherein the number of mounting holes is three;
correspondingly, the number of the right-angle ball bearings is three.
3. The unmanned aerial vehicle propeller pitch device of claim 2, wherein the right angle ball bearing further comprises a bolt end;
the paddle root fixing ring comprises a fixing ring body and a connecting part;
one side of the fixed ring body is provided with a connecting part, and the other side of the fixed ring body is connected with the paddle;
and the connecting part is internally provided with a thread matched with the bolt end, and the bolt end is in threaded connection with the connecting part.
4. The unmanned aerial vehicle propeller pitch change device of claim 1, further comprising a guide shaft, wherein the guide shaft serves as a guide support;
the transmission triangular block is provided with a guide hole, and the guide shaft is sleeved in the guide hole.
5. The propeller pitch changing device for the unmanned aerial vehicle as claimed in claim 4, wherein a power connecting rod is fixed to the upper top surface of the transmission triangular block;
the power connecting rod drives the transmission triangular block to do up-and-down and rotary motion along the guide shaft.
6. The unmanned aerial vehicle propeller pitch change device of claim 3, wherein the bolt end is further provided with a locknut.
7. The unmanned aerial vehicle propeller pitch changing device of claim 1, wherein the deep groove ball bearings are coated with grease.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011598648.5A CN112623212A (en) | 2020-12-29 | 2020-12-29 | Unmanned aerial vehicle screw displacement device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011598648.5A CN112623212A (en) | 2020-12-29 | 2020-12-29 | Unmanned aerial vehicle screw displacement device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112623212A true CN112623212A (en) | 2021-04-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011598648.5A Pending CN112623212A (en) | 2020-12-29 | 2020-12-29 | Unmanned aerial vehicle screw displacement device |
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| Country | Link |
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| CN (1) | CN112623212A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114148507A (en) * | 2021-12-31 | 2022-03-08 | 广东汇天航空航天科技有限公司 | Variable pitch device and aircraft |
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| WO2018023861A1 (en) * | 2016-08-04 | 2018-02-08 | 深圳市大疆创新科技有限公司 | Propeller, power kit and unmanned aerial vehicle |
| CN108860629A (en) * | 2018-06-25 | 2018-11-23 | 云南优航无人机科技有限公司 | A kind of rotary-wing transmission mechanism of unmanned plane |
| CN208559757U (en) * | 2018-05-25 | 2019-03-01 | 杨伟 | Efficient mute type helicopter screw propeller |
| US20190161179A1 (en) * | 2016-04-07 | 2019-05-30 | AileLinX Inc. | Helicopter Rotor Head, Multirotor Helicopter, and Helicopter |
| EP3753850A1 (en) * | 2019-06-17 | 2020-12-23 | LEONARDO S.p.A. | Anti-torque rotor for a helicopter |
| CN213921487U (en) * | 2020-12-29 | 2021-08-10 | 中国航天空气动力技术研究院 | Unmanned aerial vehicle screw displacement device |
-
2020
- 2020-12-29 CN CN202011598648.5A patent/CN112623212A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20190161179A1 (en) * | 2016-04-07 | 2019-05-30 | AileLinX Inc. | Helicopter Rotor Head, Multirotor Helicopter, and Helicopter |
| WO2018023861A1 (en) * | 2016-08-04 | 2018-02-08 | 深圳市大疆创新科技有限公司 | Propeller, power kit and unmanned aerial vehicle |
| CN107042884A (en) * | 2017-03-18 | 2017-08-15 | 北京天宇新超航空科技有限公司 | A kind of tilting rotor wing unmanned aerial vehicle |
| CN208559757U (en) * | 2018-05-25 | 2019-03-01 | 杨伟 | Efficient mute type helicopter screw propeller |
| CN108860629A (en) * | 2018-06-25 | 2018-11-23 | 云南优航无人机科技有限公司 | A kind of rotary-wing transmission mechanism of unmanned plane |
| EP3753850A1 (en) * | 2019-06-17 | 2020-12-23 | LEONARDO S.p.A. | Anti-torque rotor for a helicopter |
| CN213921487U (en) * | 2020-12-29 | 2021-08-10 | 中国航天空气动力技术研究院 | Unmanned aerial vehicle screw displacement device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114148507A (en) * | 2021-12-31 | 2022-03-08 | 广东汇天航空航天科技有限公司 | Variable pitch device and aircraft |
| CN114148507B (en) * | 2021-12-31 | 2023-11-03 | 广东汇天航空航天科技有限公司 | Pitch control device and aircraft |
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