CN213414203U - Folding propeller capable of bearing high-speed airflow blowing - Google Patents
Folding propeller capable of bearing high-speed airflow blowing Download PDFInfo
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- CN213414203U CN213414203U CN202021860830.9U CN202021860830U CN213414203U CN 213414203 U CN213414203 U CN 213414203U CN 202021860830 U CN202021860830 U CN 202021860830U CN 213414203 U CN213414203 U CN 213414203U
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- propeller
- lock
- root
- paddle
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Abstract
A folding propeller capable of withstanding high velocity air blasts, comprising: the device comprises a power motor, a propeller hub, a switching bracket, a limiter, a reed, a centrifugal force lock, a lock shaft, a propeller root, a propeller blade, a steel ball, a spiral spring, a jackscrew and a fairing. Under the condition that the unmanned aerial vehicle is at a high speed and a propeller power system does not work, the propeller is ensured to be in a folded state, so that the unmanned aerial vehicle has a smoother appearance, and under the action of high-speed airflow, the propeller blades in the folded state cannot be opened; in addition, when the propeller power system starts to work, the blades can be smoothly opened only through the rotation of the propeller power motor, and the propeller power system is in a working state. The utility model provides a folding problem of accomodating and expanding work of unmanned aerial vehicle screw driving system's paddle, fold condition can bear the high velocity draught and blow to can be to the expansion state conversion, the expansion state can normally work.
Description
Technical Field
The utility model relates to a can bear folding screw that high velocity air flows blows and attacks belongs to unmanned aerial vehicle driving system field.
Background
Modern unmanned aerial vehicle is towards miniaturized development, and beta structure adaptation small space is accomodate, and the quick expanding structure in back is gone out in the release, gets into flight state fast, is unmanned aerial vehicle's an important design. At present unmanned aerial vehicle impels folding of screw mainly still in order to adapt to the demand that reduces the receiving space, and the appearance of screw driving system is not smooth after folding, can not bear high-speed air current and blow, consequently unmanned aerial vehicle can not carry out high-speed (speed is greater than 80m/s) flight with higher aerodynamic performance (low resistance, little interference) under fold condition.
SUMMERY OF THE UTILITY MODEL
The technical solution problem of the utility model is that: the defects of the prior art are overcome, the folding propeller capable of bearing high-speed airflow blowing is provided, and the folding propeller is ensured to be in a folding state under the condition that an unmanned aerial vehicle is at a high speed and a propeller power system does not work, so that the unmanned aerial vehicle has a smoother appearance, and under the action of the high-speed airflow, the folded propeller blades cannot be opened; in addition, when the propeller power system starts to work, the blades can be smoothly opened only through the rotation of the propeller power motor, and the propeller power system is in a working state. The utility model provides a folding problem of accomodating and expanding work of unmanned aerial vehicle screw driving system's paddle, fold condition can bear the high velocity draught and blow to can be to the expansion state conversion, the expansion state can normally work.
The technical scheme of the utility model is that:
a folding propeller capable of withstanding high velocity air blasts, comprising: the device comprises a power motor, a propeller hub, a switching bracket, a limiter, a reed, a centrifugal force lock, a lock shaft, a propeller root, a propeller blade, a steel ball, a spiral spring, a jackscrew and a fairing;
the plurality of blades and the propeller root are connected with the propeller hub through the propeller root shaft; the paddle and the paddle root can rotate around the corresponding paddle root shaft; a plurality of blades and roots are uniformly distributed on the hub in the circumferential direction;
the power motor is used for driving the hub to rotate;
the fairing is fixedly connected with the propeller hub, and grooves matched with the blades in number and shape are processed on the fairing;
the centrifugal locks are fixedly connected with the propeller hub through lock shafts and can rotate around the lock shafts;
the plurality of limiters are fixedly connected with the propeller hub, and each limiter is fixedly connected with a reed;
a locking groove corresponding to the centrifugal force lock protruding part is processed on the paddle root;
the limiting stopper, the reed and the centrifugal force lock are matched to lock the blade and the paddle root in a folded state;
the centrifugal lock can rotate around the lock shaft under the action of centrifugal force, and pushes the reed to bend and deform, so that the paddle and the paddle root are unlocked from a folded state;
a plurality of through holes are processed on the propeller hub at positions corresponding to the propeller root, and the steel balls are fixed in the through holes through a spiral spring and a jackscrew; the locking groove on the paddle root is matched with the steel ball, so that the paddle and the paddle root are locked in the unfolding state after rotating to the proper position.
The propeller hub is connected with the power motor through the adapter bracket; or the hub is directly connected with the power motor.
In the folded state, the blades are stored in the grooves of the fairing to form a smooth shape.
The locking groove of oar root includes: an auxiliary locking groove and a folding locking groove;
the auxiliary locking groove and the folding locking groove are distributed around the propeller root shaft, and the relative distribution angle is equal to the angle of the propeller from folding to unfolding.
The depth of the locking groove is more than 0.9 times of the radius of the steel ball.
The spring plate presses the centrifugal lock to avoid the centrifugal lock from being separated from the locking state due to vibration and air flow blowing.
Compared with the prior art, the utility model beneficial effect be:
the utility model discloses the paddle fold condition is down forms a comparatively smooth appearance with the radome fairing to there is locking mechanical system locking paddle for folding and paste the state of tight radome fairing, can bear blowing of the air current of great speed. Additionally, the utility model discloses under fold condition, owing to have comparatively in the same direction as smooth appearance, the aerodynamic resistance that this system produced is smaller, and the aerodynamic interference power of production is less, is favorable to unmanned aerial vehicle to fly at a high speed under fold condition.
Drawings
Fig. 1 is the utility model discloses folding screw fold condition is the installation schematic diagram on unmanned aerial vehicle.
Fig. 2 is the utility model discloses folding screw expandes the installation schematic diagram of state on unmanned aerial vehicle.
Fig. 3 is a schematic view of the folding propeller folding state of the present invention as an independent part.
Fig. 4 is a cross-sectional view of the foldable propeller of the present invention in an unfolded state.
Fig. 5 is a cross-sectional view of the folding propeller of the present invention in a folded state.
Fig. 6 is a partial cross-sectional view of the folded blade root locking mechanism of the foldable propeller of the present invention.
Fig. 7 is a partial sectional view of the folded propeller of the present invention in an unlocked state.
Figure 8 is the folding screw fold condition of the present invention screw blade and fairing cross-sectional view.
Fig. 9 is a schematic view of a folded propeller blade and a blade root of the present invention.
Fig. 10 is a schematic view of the centrifugal lock of the foldable propeller of the present invention.
Detailed Description
As shown in fig. 1 and 2, the utility model relates to a folding propeller capable of bearing high-speed airflow blowing, which has the main function that when an unmanned aerial vehicle flies at high speed and a propeller power system does not work, the propeller is in a folded state, so that the unmanned aerial vehicle has a smoother appearance, and under the action of high-speed airflow, the propeller blades in the folded state can not be opened; in addition, when the propeller power system starts to work, the blades can be smoothly opened only through the rotation of the propeller power motor, and the propeller power system is in a working state. The utility model provides a folding problem of accomodating and expanding work of unmanned aerial vehicle screw driving system's paddle, fold condition can bear the high velocity draught and blow to can be to the expansion state conversion, the expansion state can normally work.
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
The utility model relates to a can bear folding screw that high-speed air current blows, as shown in fig. 5, 6, include: the device comprises a power motor 1, a propeller hub 2, a switching bracket 3, a limiter 4, a reed 5, a centrifugal force lock 6, a lock shaft 7, a propeller shaft 8, a propeller root 9, a propeller blade 10, a steel ball 11, a spiral spring 12, a jackscrew 13 and a fairing 14. The blades 10 and the propeller roots 9 are connected with the propeller hub 2 through a propeller root shaft 8; the blades 10 and the blade roots 9 can rotate around the corresponding blade root shafts 8; a plurality of blades 10 and a plurality of blade roots 9 are uniformly distributed on the hub 2 in the circumferential direction. The power motor 1 is used to drive the hub 2 in rotation.
The fairing 14 is fixedly connected to the hub 2, and the fairing 14 is provided with grooves matched with the blades 10 in number and shape, as shown in figure 8. The centrifugal locks 6 are fixedly connected to the hub 2 by a lock shaft 7, the centrifugal locks 6 being rotatable around the lock shaft 7.
The plurality of limiters 4 are fixedly connected with the propeller hub 2, and each limiter 4 is fixedly connected with a reed 5. The paddle root 9 is provided with a locking groove corresponding to the protruding part of the centrifugal lock 6. The stop 4, the spring plate 5 and the centrifugal force lock 6 are matched to lock the paddle 10 and the paddle root 9 in a folded state. The centrifugal lock 6 can rotate around the lock shaft 7 under the action of centrifugal force, and the centrifugal lock 6 pushes the reed 5 to be bent and deformed, so that the paddle 10 and the paddle root 9 are unlocked from a folded state, as shown in fig. 7.
A plurality of through holes are processed on the propeller hub 2 at positions corresponding to the propeller root 9, and the steel balls 11 are fixed in the through holes through a spiral spring 12 and a jackscrew 13; the locking groove on the paddle root 9 is matched with the steel ball 11, so that the paddle 10 and the paddle root 9 are locked in the unfolding state after being rotated to the proper position.
The propeller hub 2 is connected with the power motor 1 through the adapter bracket 3; or the hub 2 is directly connected with the power motor 1.
In the folded condition, the blade 10 is stored in a recess in the fairing 14 to form a smooth profile.
The locking groove of the paddle root 9 comprises: an auxiliary locking groove 902 and a folding locking groove 901;
the secondary locking slots 902 and the fold-over locking slots 901 are distributed around the root axis 8 at a relative distribution angle equal to the angle of the propeller from folded to unfolded.
The depth of the lock groove 901 is greater than 0.9 times the radius of the steel ball 11.
The spring 5 presses the centrifugal lock 6 to prevent the centrifugal lock 6 from being separated from the locking state due to vibration and air flow blowing.
Examples
A folding propeller capable of withstanding high velocity air blasts, comprising: the device comprises a power motor 1, a propeller hub 2, a switching bracket 3, a limiter 4, a reed 5, a centrifugal force lock 6, a lock shaft 7, a propeller shaft 8, a propeller root 9, a propeller blade 10, a steel ball 11, a spiral spring 12, a jackscrew 13 and a fairing 14.
The propeller hub 2 is an important basic structure of the folding propeller, most parts are installed on the propeller hub 2, and the propeller hub 2 is connected with the power motor 1 through the adapter bracket 3 and can also be directly connected with the power motor 1.
The blade 10 is stored in the recess of the fairing 14 in the folded condition to form a smooth profile. The centrifugal lock 6 locks the propeller root 9, and the reed 5 presses the centrifugal lock 6 to prevent the centrifugal lock 6 from being separated from the locking state due to vibration and air flow blowing.
When the power motor 1 is ready to be unfolded, the centrifugal force lock 6 rotates around the lock shaft 7 under the action of centrifugal force to push the reed 5 to bend and deform, the centrifugal force lock 6 is separated from a locking state, the paddle 10 and the paddle root 9 rotate around the paddle root shaft 8 under the action of centrifugal force until the paddle root is unfolded, the steel balls 11 fall into the pits on the paddle root, and the paddle 10 and the paddle root 9 are locked in the unfolded state, as shown in fig. 4.
1) With a centrifugal lock 6 and a paddle root 9 which can be locked by the centrifugal lock 6 in the folded state.
2) The root 9 and the blade 10 may be integrally produced parts, may have no clear interface, and when being an integral part, the root 9 or the blade 10 of the present invention is regarded as the same part, as shown in fig. 9.
3) The paddle root 9 has a fold-over locking slot 901.
4) The paddle root 9 has a fold-assist locking slot 902.
5) The secondary locking slots 902 and the fold-over locking slots 901 are distributed around the root rotation axis 903 at an angle equal to the angle of the propeller from folded to unfolded.
6) The depth of the lock groove 901 is greater than 0.9 times the radius of the steel ball 11.
7) The centrifugal lock 6 has a mass 601 which generates a centrifugal force when rotated in the propeller folded state, the centrifugal force generated by which causes the centrifugal lock 6 to rotate about its rotation axis hole 603.
8) As shown in fig. 10, the centrifugal lock 6 has a lock face 602 that locks the blade root, and in the locked state, the lock face 602 is in contact with the blade root groove 901.
9) The mass block 601 and the locking surface 602 are axially distributed around the rotating shaft space 603, and the distribution angles are different from 50 degrees to 180 degrees.
10) Fairing 14 has an equal number of recesses 1402 to blades 10 for storing blades 10 in the folded condition.
11) The fairing 14 is made as any one cross fairing section 1401, the cross section 1001 of the corresponding blade 10 is jointed with the fairing section 1401, and the maximum clearance of the jointed part is less than 1 mm.
Description of the principle:
as shown in fig. 3, the fold-locked state: the paddle 10 is arranged in the groove 1402 of the fairing 14, the steel ball 11 is pressed against the auxiliary locking groove 902 under the action of the spiral spring 12 to provide secondary locking force, and the locking surface 602 of the centrifugal lock 6 is abutted with the locking groove 901 under the action of the reed 5 to provide primary locking force. In the locked state, the blade can bear the blowing of airflow which is equal to the airflow dynamic pressure and is perpendicular to the rotation axis of the propeller at the sea level of 0-100 m/s (the conversion method is that the airflow dynamic pressure is equal, and the airflow speed component perpendicular to the axis is taken), and the condition that the blade 10 is separated from the fairing 14 and even unfolded does not occur.
Unlocking and unfolding: when the centrifugal force is large enough, the centrifugal force lock 6 pushes the reed 5 to bend and deform, and the centrifugal force lock 6 is separated from the locking state. The paddle 10 and the paddle root 9 rotate around the paddle root shaft 8 under the action of centrifugal force, and the steel balls 11 are separated from the auxiliary locking groove 902. The paddle 10 and the paddle root 9 are rotated until the deployed state, the steel balls 11 fall into the locking grooves 901 on the paddle root, and the paddle 10 and the paddle root 9 are locked in the deployed state.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. A folding propeller capable of withstanding high velocity air blasts, comprising: the device comprises a power motor (1), a propeller hub (2), a switching bracket (3), a limiter (4), a reed (5), a centrifugal force lock (6), a lock shaft (7), a propeller shaft (8), a propeller root (9), a propeller blade (10), steel balls (11), a spiral spring (12), a jackscrew (13) and a fairing (14);
the plurality of blades (10) and the propeller root (9) are connected with the propeller hub (2) through a propeller root shaft (8); the paddles (10) and the paddle root (9) can rotate around the corresponding paddle root shafts (8); a plurality of blades (10) and blade roots (9) are uniformly distributed on the hub (2) in the circumferential direction;
the power motor (1) is used for driving the propeller hub (2) to rotate;
the fairing (14) is fixedly connected with the propeller hub (2), and grooves matched with the blades (10) in number and shape are machined on the fairing (14);
the centrifugal locks (6) are fixedly connected with the propeller hub (2) through lock shafts (7), and the centrifugal locks (6) can rotate around the lock shafts (7);
the plurality of limiters (4) are fixedly connected with the propeller hub (2), and each limiter (4) is fixedly connected with a reed (5) respectively;
a locking groove corresponding to the protruding part of the centrifugal lock (6) is processed on the paddle root (9);
the limiter (4), the reed (5) and the centrifugal lock (6) are matched to lock the paddle (10) and the paddle root (9) in a folded state;
the centrifugal lock (6) can rotate around the lock shaft (7) under the action of centrifugal force, and the centrifugal lock (6) pushes the reed (5) to bend and deform, so that the paddle (10) and the paddle root (9) are unlocked from a folded state;
a plurality of through holes are processed on the propeller hub (2) at positions corresponding to the propeller root (9), and the steel balls (11) are fixed in the through holes through a spiral spring (12) and a jackscrew (13); the locking groove on the paddle root (9) is matched with the steel ball (11), so that the paddle (10) and the paddle root (9) are locked in the unfolding state after rotating to the right position.
2. The folding propeller capable of bearing high-speed airflow blowing according to claim 1, characterized in that the propeller hub (2) is connected with the power motor (1) through a switching bracket (3); or the propeller hub (2) is directly connected with the power motor (1).
3. A foldable propeller capable of withstanding high velocity air blasts according to claim 1, characterised in that in the folded condition the blades (10) are stored in recesses in the cowling (14) to form a smooth profile.
4. A folded rotor capable of withstanding high velocity air blasts according to any of claims 1 to 3, characterised in that the lock-up slot of the root (9) comprises: an auxiliary locking groove (902) and a folding locking groove (901);
the auxiliary locking groove (902) and the folding locking groove (901) are distributed around the propeller shaft (8), and the relative distribution angle is equal to the angle from the folding to the unfolding of the propeller.
5. The foldable propeller capable of withstanding high velocity air blasts as claimed in claim 4, wherein the depth of the lock groove (901) is greater than 0.9 times the radius of the steel balls (11).
6. The folding propeller capable of withstanding high-speed airflow blows according to claim 4, characterized in that the centrifugal lock (6) is pressed by the spring plate (5) to avoid the centrifugal lock (6) from being out of the locking state due to vibration and airflow blows.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021860830.9U CN213414203U (en) | 2020-08-31 | 2020-08-31 | Folding propeller capable of bearing high-speed airflow blowing |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021860830.9U CN213414203U (en) | 2020-08-31 | 2020-08-31 | Folding propeller capable of bearing high-speed airflow blowing |
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| CN213414203U true CN213414203U (en) | 2021-06-11 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112124567A (en) * | 2020-08-31 | 2020-12-25 | 中国航天空气动力技术研究院 | Folding propeller capable of bearing high-speed airflow blowing |
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- 2020-08-31 CN CN202021860830.9U patent/CN213414203U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112124567A (en) * | 2020-08-31 | 2020-12-25 | 中国航天空气动力技术研究院 | Folding propeller capable of bearing high-speed airflow blowing |
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