Anti-fall slow-descent drone and use method thereof

Abstract

The present invention relates to the technical field of drones, and more specifically to an anti-fall slow-descent drone and a method for using the same, comprising: a main body, a rotating support seat provided at the center of the main body, and side support rods rotatably provided above the rotating support seat, wherein fixed locking rings are provided at intervals around the outer sides of the polygonal support rods. The present invention connects and fixes the motor support via multiple horizontal arms provided around the outer side of a support turntable. During normal flight, the polygonal support rods keep the tilt springs locked. When the drone malfunctions, the sliding locking rings can slide downward to unlock the polygonal support rods so that they can rotate. As a result, when the drone falls, the support turntable pushes the slow-descent blades on the multiple horizontal arms in the opposite direction through air resistance to rotate around the polygonal support rods, thereby generating a certain lift force to increase the falling resistance and reduce the falling speed, so that the drone as a whole can land slowly, which is beneficial to improving the safety of the drone.

Description

Technical Field

[0001] The present invention relates to the technical field of unmanned aerial vehicles (UAVs), and in particular to an anti-fall slow-descent UAV and a method for using the same. Background Art

[0002] Since multi-rotor drones rely entirely on the lift generated by the rotation of the blades driven by the motor to fly, when the drone malfunctions in the air, especially when the motor stops, it is difficult to perform a cushioned landing and it is very easy to fall directly and be damaged, causing dangerous damage to people and objects on the ground, and the safety during flight is relatively low.

[0003] The patent with application number CN201810051756.7 discloses an anti-fall device for unmanned aerial vehicles, comprising a unmanned aerial vehicle shell, an anti-fall cavity embedded in the upper part of the unmanned aerial vehicle shell, hinges fixedly provided on both sides of the anti-fall cavity mouth, and the hinges hingedly connected to the tail ends of two sets of anti-fall cavity doors, two telescopic rods fixedly installed on both sides of the anti-fall cavity, and a pushing slide rail fixedly installed at the bottom of the anti-fall cavity door, the head of the telescopic rod is provided with a sliding member, which is slidably clamped in the pushing slide rail, and the bottom end of the anti-fall cavity is fixedly connected to the bottom of the anti-fall parachute cavity. When the unmanned aerial vehicle of the present invention falls, it can be detected by a speed detector or a pressure sensor. At this time, the telescopic rod is extended, and the sliding member at the head of the telescopic rod slides in the pushing slide rail, pushing open the anti-fall cavity door. Under the elastic force of the spring, the ejection plate is quickly ejected, and the anti-fall parachute is ejected. After the anti-fall parachute is deployed, the unmanned aerial vehicle can be prevented from falling.

[0004] However, the parachute cushioning structure it uses has relatively harsh usage conditions. It requires the drone to fall in a non-tumbling state before it can be released and used normally. It has certain limitations, and it is very easy to be entangled by the rotating blade structure during release or be unable to fully unfold due to wind force, causing failure. The overall reliability and safety are also low. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to propose an anti-fall slow-descent drone and a method of using it, so as to solve the problem that the use conditions of the drone using the parachute buffer structure are relatively harsh, and the drone needs to fall in a non-rolling state to be released and used normally, which has certain limitations. In addition, it is very easy to be entangled by the rotating blade structure during release or be unable to fully unfold due to wind force and fail, and the overall reliability and safety are also low.

[0006] Based on the above objectives, the present invention provides an anti-fall slow-descent drone, comprising a main body, a rotating support seat provided at the center of the main body, and further comprising:

[0007] A polygonal support rod is rotatably arranged above the rotating support seat, and a fixed locking ring is arranged around the outer side of the polygonal support rod at intervals. The fixed locking ring is fixedly connected to the main body, and an engaging locking groove is provided at the center of the fixed locking ring;

[0008] A support turntable is fixedly arranged on the top end of the polygonal support rod, and a plurality of horizontal support arms are evenly arranged around the outer side of the support turntable in a circular shape, a slow-down blade is horizontally arranged in the middle of the horizontal support arm, and a motor support is arranged at the outer end of the horizontal support arm;

[0009] A sliding locking ring is embedded in the middle of the embedding locking groove, a center sliding sleeve is provided at the center of the sliding locking ring, the sliding locking ring is slidably connected to the multilateral support rod through the center sliding sleeve, an unlocking spring is provided above the sliding locking ring, a locking groove is provided at the center of the outer side surface of the sliding locking ring, a locking sleeve is provided in the middle of the fixed locking ring, an elastic locking pin is embedded and slidably provided on the inner side of the locking sleeve, a locking electromagnet is provided in the middle of the locking groove, and the elastic locking pin and the locking groove are embedded with each other to lock the sliding locking ring.

[0010] In some optional embodiments, a tilting shaft is provided at the bottom rear end of the rotating support seat, and the rotating support seat is rotatably connected to the main body through the tilting shaft, the axial center line of the tilting shaft is parallel to the horizontal center line of the main body, and a tilting limit block is provided on the rear side of the rotating support seat, and the tilting limit block is fixedly connected to the main body. When the rotating support seat tilts toward the rear side along the tilting shaft, the rotation angle is limited by the tilting limit block, and a tilting spring is provided on the front side of the rotating support seat.

[0011] In some optional embodiments, a center locking sleeve is provided below the rotating support seat, a magnetic elastic pin is provided on the inner side of the center locking sleeve, a center electromagnet is provided at the bottom end of the center locking sleeve, and a center locking groove is provided at the bottom center of the rotating support seat. The sizes of the center locking groove and the magnetic elastic pin match each other, and the rotating support seat maintains vertical locking by the mutual engagement of the magnetic elastic pin and the center locking groove.

[0012] In some optional embodiments, a corrugated flexible sleeve is provided around the outer side of the rotating support seat, the bottom end of the corrugated flexible sleeve is fixedly connected to the main body, and a rotating connecting ring is provided at the top of the corrugated flexible sleeve, and the corrugated flexible sleeve is rotatably connected to the support turntable through the rotating connecting ring.

[0013] In some optional embodiments, a telescopic sleeve is horizontally arranged inside the horizontal support arm, a telescopic support rod is nested and slidably arranged inside the telescopic sleeve, the outer end of the telescopic support rod is fixedly connected to the motor support, a nested receiving groove is arranged on the inner side of the slow-down blade, an extension blade is nested and slidably arranged inside the nested receiving groove, and the outer end of the extension blade is connected to the telescopic support rod.

[0014] In some optional embodiments, a vertical locking sleeve is provided in the middle of the telescopic support rod, a telescopic elastic pin is slidably provided on the inner side of the vertical locking sleeve, a telescopic locking groove is provided in the middle of the telescopic sleeve, the dimensions of the telescopic elastic pin and the telescopic locking groove match each other, a horizontal locking sleeve is horizontally provided at the lower end of the vertical locking sleeve, a centrifugal unlocking block is slidably provided on the inner side of the horizontal locking sleeve, a centrifugal spring is provided at the outer end of the centrifugal unlocking block, the top surface of the centrifugal unlocking block and the bottom surface of the telescopic elastic pin are fitted with each other, and the telescopic elastic pin is restricted from moving downward out of the telescopic locking groove by the centrifugal unlocking block.

[0015] The drone comprises a single, multi-blade rotor structure that can rotate around a center, formed by a support turntable, multiple horizontal arms, and slow-descent blades. When the drone falls, the support turntable, through air resistance, pushes the slow-descent blades on the multiple horizontal arms in the opposite direction to rotate around the multilateral support rods, generating a certain amount of lift to increase the falling resistance and reduce the falling speed, allowing the drone as a whole to land slowly. The rotating support base is rotatably connected to the main body via a tilting shaft. When the drone falls, the central electromagnet loses power, and the magnetic elastic pin loses its magnetic repulsion, moving downward and retracting into the central locking sleeve and disengaging the central locking groove. As a result, the tilt spring rotates rearward along the tilting shaft through the rotating support base, and the rotation angle is limited by a tilting stopper. This causes the support turntable, multiple horizontal arms, and slow-descent blades, which can rotate around a center, to tilt backward at a certain angle as a whole. This facilitates the reverse push of the slow-descent blades on the multiple horizontal arms around the multilateral support rods by air resistance when the drone falls, while providing a component of force to the front, allowing the drone as a whole to fly forward while falling, further reducing the falling speed and improving the safety of the drone.

[0016] In some optional embodiments, a support connecting shaft is provided at the inner end of the horizontal support arm, and the horizontal support arm is rotatably connected to the support turntable through the support connecting shaft. A plurality of variable pitch rods are arranged around the top of the sliding locking ring, and the variable pitch rods are arranged in a one-to-one correspondence with the slow-descent blades. The upper and lower ends of the variable pitch rods are rotatably connected to the slow-descent blades and the variable pitch rods respectively. When the sliding locking ring slides downward, the slow-descent blades are pulled by the variable pitch rods to rotate a certain angle along the support connecting shaft.

[0017] In some optional embodiments, horizontal folding rods are symmetrically arranged in parallel on the left and right sides of the main body, a folding shaft is arranged at the front end of the horizontal folding rod, the horizontal folding rod is rotatably connected to the main body through the folding shaft, the vertical center line of the folding shaft is parallel to the vertical center line of the main body, an unfolding spring is connected to the outer side of the horizontal folding rod, a chimeric receiving groove is arranged in the middle of the horizontal folding rod, an arc-shaped film is folded and chimerically arranged on the inner side of the chimeric receiving groove, the inner and outer ends of the arc-shaped film are respectively fixedly connected to the main body and the horizontal folding rod, a locking magnetic buckle is arranged at the rear end of the horizontal folding rod, and an unlocking electromagnet is arranged on the inner side of the locking magnetic buckle.

[0018] In some optional embodiments, a lifting motor is provided in the middle of the motor support, a storage shaft is symmetrically connected to the shaft end of the lifting motor, and a power blade is rotatably connected to the outer side of the storage shaft.

[0019] A method for using an anti-fall slow-descent drone, comprising the following steps:

[0020] When the drone loses power, the lifting motor and power blades stop rotating, and the locking electromagnet loses power at the same time. The elastic locking pin loses its magnetic force and retracts the locking sleeve to disengage from the locking slot. The sliding locking ring is unlocked and pushed downward by the unlocking spring to disengage from the engaging locking slot, thereby separating the sliding locking ring and the fixed locking ring from each other to dynamically unlock the multilateral support rod so that it can rotate normally. As a result, the support turntable pushes the slow-descent blades on multiple horizontal arms in the opposite direction through air resistance to rotate around the multilateral support rod when the drone falls, so as to generate a certain lift to increase the falling resistance and reduce the falling speed, so that the drone as a whole can land slowly to avoid a falling accident.

[0021] As can be seen from the above description, the present invention provides an anti-fall slow-descent drone, which is connected to a fixed motor support by multiple horizontal arms arranged around the outer side of the support turntable, and flies by the lift generated by the rotation of the power blades driven by the lifting motor installed on the motor support, forming a multi-rotor flight structure, and the horizontal arms are also provided with slow-descent blades. The entire support turntable and the multiple slow-descent blades constitute a multi-blade structure, and the support turntable is interconnected with the main body through a multilateral support rod and a rotating support seat. During normal flight, the multilateral support rod is locked and fixed by the mutual engagement of a sliding locking ring and a fixed locking ring. When the drone malfunctions, the sliding locking ring can slide downward to unlock the multilateral support rod, allowing the multilateral support rod to rotate normally, and then the support turntable pushes the slow-descent blades on the multiple horizontal arms in the opposite direction to rotate around the multilateral support rod through air resistance when the drone falls, thereby generating a certain lift to increase the falling resistance and reduce the falling speed, so that the drone as a whole can land slowly, thereby avoiding falling accidents and improving the safety of the drone. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 This is a schematic diagram of the front structure of an embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of the back structure of an embodiment of the present invention;

[0025] Figure 3 A schematic diagram of a partial structure of an embodiment of the present invention;

[0026] Figure 4 This is a schematic structural diagram of the center of the main body of an embodiment of the present invention;

[0027] Figure 5 A schematic diagram of a partial structure of a rotating support seat according to an embodiment of the present invention;

[0028] Figure 6 A schematic structural diagram of a multilateral support rod according to an embodiment of the present invention;

[0029] Figure 7 A schematic structural diagram of a support turntable according to an embodiment of the present invention;

[0030] Figure 8 This is a schematic structural diagram of a telescopic sleeve according to an embodiment of the present invention;

[0031] Figure 9 For the embodiment of the present invention Figure 8 A schematic diagram of the structure at the enlarged position of part A;

[0032] Figure 10 Schematic diagram of the structure of the horizontal support arm in the extended state according to an embodiment of the present invention;

[0033] Figure 11 A schematic structural diagram of a horizontal folding rod according to an embodiment of the present invention;

[0034] Figure 12 Schematic diagram of the structure of the horizontal folding rod in the unfolded state according to an embodiment of the present invention.

[0035] The following are marked in the figure:

[0036] 1. Main body; 101. Corrugated flexible sleeve; 102. Rotating connecting ring; 103. Center locking sleeve; 104. Magnetic elastic pin; 105. Center electromagnet; 106. Tilt limit block; 2. Rotating support seat; 201. Multi-sided support rod; 202. Tilt shaft; 203. Center locking groove; 204. Tilt spring; 3. Fixed locking ring; 301. Chiming locking groove; 302. Locking sleeve; 303. Elastic locking pin; 304. Locking electromagnet; 4. Support turntable; 401. Horizontal support arm; 402. Support connecting shaft; 403. Slow-down blade; 404. Nested storage slot; 405. Extended blade; 5. Telescopic sleeve; 501, telescopic locking slot; 502, telescopic support rod; 503, vertical locking sleeve; 504, horizontal locking sleeve; 505, telescopic elastic pin; 506, centrifugal unlocking block; 507, centrifugal spring; 6, motor support; 601, lifting motor; 602, storage shaft; 603, power blade; 7, sliding locking ring; 701, locking slot; 702, center sliding sleeve; 703, unlocking spring; 704, pitch-changing rod; 8, horizontal folding rod; 801, folding shaft; 802, unfolding spring; 803, interlocking storage slot; 804, arc-shaped film; 805, locking magnetic buckle; 806, unlocking electromagnet. DETAILED DESCRIPTION

[0037] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to specific embodiments.

[0038] It should be noted that, unless otherwise defined, the technical or scientific terms used in the present invention should have the usual meanings understood by people with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0039] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 and Figure 7As shown, an anti-fall slow-descent UAV includes a main body 1, a rotating support base 2 is provided at the center of the main body 1, and further includes:

[0040] The polygonal support rod 201 is rotatably mounted above the rotating support base 2. A fixed locking ring 3 is disposed around the outer side of the polygonal support rod 201. The fixed locking ring 3 is fixedly connected to the main body 1. A locking groove 301 is disposed at the center of the fixed locking ring 3.

[0041] The support turntable 4 is fixedly arranged at the top end of the multilateral support rod 201. The outer side of the support turntable 4 is evenly and circularly arranged with multiple horizontal support arms 401. The middle of the horizontal support arm 401 is horizontally provided with a slow-down blade 403. The outer end of the horizontal support arm 401 is provided with a motor support 6;

[0042] The sliding locking ring 7 is embedded in the middle of the embedding locking groove 301. A center sleeve 702 is provided at the center of the sliding locking ring 7. The sliding locking ring 7 is slidingly connected to the multilateral support rod 201 through the center sleeve 702. An unlocking spring 703 is provided above the sliding locking ring 7. A locking groove 701 is provided at the center of the outer side of the sliding locking ring 7. A locking sleeve 302 is provided in the middle of the fixed locking ring 3. An elastic locking pin 303 is embedded and slidably provided on the inner side of the locking sleeve 302. A locking electromagnet 304 is provided in the middle of the locking groove 701. The elastic locking pin 303 and the locking groove 701 are embedded with each other to lock the sliding locking ring 7.

[0043] In this embodiment, the drone is connected to the fixed motor support 6 through multiple horizontal support arms 401 arranged around the outside of the support turntable 4, and a lifting motor 601 is arranged in the middle of the motor support 6, and the axial end of the lifting motor 601 is symmetrically connected with a storage shaft 602, and the outer side of the storage shaft 602 is rotatably connected with a power blade 603, so that the lifting motor 601 installed on the motor support 6 can drive the power blade 603 to generate lift flight by rotating, thereby forming a multi-rotor flight structure, and the horizontal support arm 401 is also provided with a slow-descent blade 403. The entire support turntable 4 and multiple slow-descent blades 403 constitute a multi-blade structure, and the support turntable 4 is interconnected with the main body 1 through the multilateral support rod 201 and the rotating support seat 2. During normal flight, the sliding locking ring 7 is embedded in the middle of the embedding locking groove 301, so that the multilateral support rod 201 is embedded with the fixed locking ring 3 to ensure stability. When the power failure occurs in the UAV, the lifting motor 601 and the power blade 603 stop rotating, and the locking electromagnet 304 also loses power. The elastic locking pin 303 loses its magnetic attraction and retracts the locking sleeve 302 to disengage from the locking slot 701. The sliding locking ring 7 is unlocked and pushed by the unlocking spring 703 to slide downward and disengage from the embedded locking slot 301, thereby separating the sliding locking ring 7 and the fixed locking ring 3 from each other to dynamically unlock the multilateral support rod 201, so that the multilateral support rod 201 can rotate normally, and then the support turntable 4 pushes the slow-descent blades 403 on the multiple horizontal support arms 401 in the opposite direction to rotate around the multilateral support rod 201 through air resistance when the UAV falls, so as to generate a certain lift force to increase the falling resistance and reduce the falling speed, so that the UAV as a whole can land slowly, thereby avoiding falling accidents and improving the safety of the UAV.

[0044] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 and Figure 7As shown, preferably, a corrugated flexible sleeve 101 is provided around the outer side of the rotating support seat 2, the bottom end of the corrugated flexible sleeve 101 is fixedly connected to the main body 1, and a rotating connecting ring 102 is provided on the top of the corrugated flexible sleeve 101. The corrugated flexible sleeve 101 is rotatably connected to the support turntable 4 through the rotating connecting ring 102. The drone sets a slow-down blade 403 on the horizontal support arm 401, so that the entire support turntable 4, multiple horizontal support arms 401 and slow-down blades 403 not only serve as a supporting structure for the multi-rotor, but also constitute a multi-blade single rotor structure that can rotate around the center, so that the support turntable When the UAV falls, the disc 4 pushes the slow-descent blades 403 on the multiple horizontal arms 401 in the opposite direction through air resistance to rotate around the multilateral support rod 201, so as to generate a certain lift to increase the falling resistance and reduce the falling speed, so that the UAV as a whole can land slowly. The outer side of the rotating support seat 2 is surrounded by a corrugated flexible sleeve 101 to cover the central multilateral support rod 201 and the locking structure to protect them and reduce resistance during normal flight. The corrugated flexible sleeve 101 is rotatably connected to the support turntable 4 through a rotating connecting ring 102 to facilitate the normal rotation of the support turntable 4.

[0045] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 and Figure 7As shown, optionally, a tilting shaft 202 is provided at the bottom rear end of the rotating support base 2, and the rotating support base 2 is rotatably connected to the main body 1 through the tilting shaft 202. The axial center line of the tilting shaft 202 is parallel to the horizontal center line of the main body 1. A tilting limit block 106 is provided on the rear side of the rotating support base 2. The tilting limit block 106 is fixedly connected to the main body 1. When the rotating support base 2 tilts and rotates toward the rear side along the tilting shaft 202, the rotation angle is limited by the tilting limit block 106. A tilting spring 204 is provided on the front side of the rotating support base 2, and a center locking sleeve 103 is provided at the bottom of the rotating support base 2. The inner side of the center locking sleeve 103 is provided with a A magnetic elastic pin 104 is provided, a central electromagnet 105 is provided at the bottom end of the central locking sleeve 103, a central locking groove 203 is provided at the bottom center of the rotating support base 2, and the dimensions of the central locking groove 203 and the magnetic elastic pin 104 match each other. The rotating support base 2 is locked vertically by the mutual engagement of the magnetic elastic pin 104 and the central locking groove 203. The UAV is composed of a multi-blade single rotor structure that can rotate around the center through the support turntable 4, multiple horizontal support arms 401 and the slow-down blades 403, so that when the UAV falls, the support turntable 4 pushes the slow-down blades 403 on the multiple horizontal support arms 401 in the opposite direction through air resistance around the multilateral support The support rod 201 rotates to generate a certain lift force to increase the falling resistance and reduce the falling speed, so that the drone can slowly land when it malfunctions and falls, and the rotating support seat 2 is rotatably connected to the main body 1 through the tilt shaft 202. When the drone falls, the central electromagnet 105 loses power, and the magnetic elastic pin 104 loses the magnetic repulsion and moves downward to retract the central locking sleeve 103 and disengage from the central locking groove 203, so that the tilt spring 204 will rotate backward along the tilt shaft 202 through the rotating support seat 2, and the rotation angle is limited by the tilt limit block 106, so that the support turntable 4, multiple horizontal support arms 401 and the slow-down blades 403 can form a The multi-blade single rotor structure rotates around the center and is tilted toward the rear at a certain angle as a whole, so that when the UAV falls, the air resistance can be used to push the descent blades 403 on the multiple horizontal arms 401 in the opposite direction to rotate around the multilateral support rod 201, while providing a component force to the front side, so that the UAV as a whole can fly forward while falling, so as to further reduce the falling speed and improve the safety of the UAV. At the same time, it is also convenient to tilt the lifting motor 601 and the power blade 603 on the motor support 6, and use the residual rotational kinetic energy of the lifting motor 601 and the power blade 603 to drive the horizontal arm 401 to rotate, so as to avoid the horizontal arm 401 being unable to start rotating due to the airflow.

[0046] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 and Figure 10As shown, optionally, a telescopic sleeve 5 is horizontally provided inside the horizontal support arm 401, and a telescopic support rod 502 is nested and slidably provided on the inner side of the telescopic sleeve 5. The outer end of the telescopic support rod 502 is fixedly connected to the motor support 6, and a nested storage groove 404 is provided on the inner side of the slow-down blade 403. An extension blade 405 is nested and slidably provided on the inner side of the nested storage groove 404. The outer end of the extension blade 405 is connected to the telescopic support rod 502. A vertical locking sleeve 503 is provided in the middle of the telescopic support rod 502, and a telescopic elastic pin 505 is slidably provided on the inner side of the vertical locking sleeve 503. A telescopic locking groove 501 is provided in the middle of the telescopic sleeve 5, and the dimensions of the telescopic elastic pin 505 and the telescopic locking groove 501 match each other, and the vertical locking The lower end of the sleeve 503 is horizontally provided with a horizontal locking sleeve 504, and the inner side of the horizontal locking sleeve 504 is slidably provided with a centrifugal unlocking block 506, and the outer end of the centrifugal unlocking block 506 is provided with a centrifugal spring 507. The top surface of the centrifugal unlocking block 506 fits with the bottom surface of the telescopic elastic pin 505. The telescopic elastic pin 505 is restricted by the centrifugal unlocking block 506 to move downward out of the telescopic locking groove 501. The UAV is composed of a multi-blade single rotor structure that can rotate around the center through the support turntable 4, multiple horizontal support arms 401 and the slow-down blades 403, so that when the UAV falls, the support turntable 4 pushes the slow-down blades 403 on the multiple horizontal support arms 401 in the opposite direction to rotate around the multilateral support rod 201 through air resistance, so as to generate a certain lift to increase the fall. The resistance and the falling speed are reduced, so that the UAV can land slowly when it malfunctions and falls. The horizontal support arm 401 and the slow-down blade 403 are all telescopic structures. The telescopic support rod 502 slides outward along the telescopic sleeve 5 to extend the overall length of the horizontal support arm 401, and pulls the extension blade 405 to slide outward along the nested storage groove 404 to extend the overall length of the slow-down blade 403, thereby increasing the overall area of ​​the slow-down blade 403, so as to further increase the resistance during landing and the lift generated by the rotation of the slow-down blade 403. At the same time, when the UAV is flying normally, it can be stored to maintain a small flight resistance. At the same time, the telescopic support rod 502 is locked by the telescopic elastic pin 505 when it is nested and stored in the telescopic sleeve 5, and the telescopic elastic pin 505 is locked. 05 is limited by the centrifugal unlocking block 506, so when the drone falls, the horizontal support arm 401 and the slow-descent blade 403 rotate around the multilateral support rod 201, a certain centrifugal force will be generated, which will push the centrifugal unlocking block 506 to slide outward and stagger with the telescopic elastic pin 505, so that the telescopic elastic pin 505 can move downward to disengage from the telescopic locking groove 501 to unlock the telescopic support rod 502, and the telescopic support rod 502 can be pushed by the telescopic spring arranged inside to move outward and extend, so that unlocking the telescopic support rod 502 is more convenient, fast and reliable. At the same time, when the drone has a dangerous flight accident of spinning, the telescopic support rod 502 can also be extended by centrifugal force to increase the diameter of the rotor part of the drone and the rotation resistance.This reduces the spin speed and improves the stability of the drone, making it easier to recover from the spin state, which is beneficial to improving the overall safety of the drone.

[0047] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 and Figure 7 As shown, preferably, the inner end of the horizontal support arm 401 is provided with a support connecting shaft 402, and the horizontal support arm 401 is rotatably connected to the support turntable 4 through the support connecting shaft 402, and a plurality of pitch-changing pull rods 704 are arranged around the top of the sliding locking ring 7, and the pitch-changing pull rods 704 are arranged in a one-to-one correspondence with the slow-down blades 403. The upper and lower ends of the pitch-changing pull rods 704 are rotatably connected to the slow-down blades 403 and the pitch-changing pull rods 704 respectively. When the sliding locking ring 7 slides downward, the pitch-changing pull rods 704 pull the slow-down blades 403 to rotate a certain angle along the support connecting shaft 402. The UAV is composed of a multi-blade single rotor structure that can rotate around the center through the support turntable 4, a plurality of horizontal support arms 401 and the slow-down blades 403, so that when the UAV falls, the support turntable 4 pushes the slow-down blades 403 on the multiple horizontal support arms 401 in the opposite direction through air resistance to rotate around the multilateral support rods 201, so as to generate a certain lift to increase the falling resistance and The falling speed is reduced so that the drone can land slowly when it malfunctions and falls. The horizontal support arm 401 is rotatably connected to the support turntable 4 through the support connecting shaft 402, which can drive the slow-down blade 403 to rotate along the support connecting shaft 402 to adjust its tilt angle. The multilateral support rod 201 is locked by the sliding locking ring 7 when the drone is flying normally and cannot rotate to maintain structural stability. The sliding locking ring 7 slides downward to unlock the multilateral support rod 201. At the same time, the variable pitch pull rod 704 is used to pull the slow-down blade 403 to rotate a certain angle along the support connecting shaft 402, so that the slow-down blade 403 can be adjusted from a horizontal state to a tilted state, thereby facilitating the formation of a lifting blade structure, increasing the lift generated during rotation, and thus reducing the falling speed, which is beneficial to improving the overall safety of the drone. At the same time, it is convenient for the slow-down blade 403 to maintain a horizontal angle when the drone is flying normally, so as to reduce the resistance during horizontal flight.

[0048] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 11 and Figure 12As shown, preferably, the main body 1 is symmetrically and parallelly provided with a horizontal folding rod 8, the front end of the horizontal folding rod 8 is provided with a folding shaft 801, the horizontal folding rod 8 is rotatably connected to the main body 1 through the folding shaft 801, the vertical center line of the folding shaft 801 is parallel to the vertical center line of the main body 1, the outer side of the horizontal folding rod 8 is connected with an expansion spring 802, the middle of the horizontal folding rod 8 is provided with a chiming receiving groove 803, the inner side of the chiming receiving groove 803 is folded and chime with an arc film 804, the inner and outer ends of the arc film 804 are respectively connected to the main body 1 The horizontal folding rod 8 is fixedly connected to each other, and the rear end of the horizontal folding rod 8 is provided with a locking magnetic buckle 805, and the inner side of the locking magnetic buckle 805 is provided with an unlocking electromagnet 806. The UAV is composed of a single rotor structure with multiple blades that can rotate around the center through the support turntable 4, multiple horizontal support arms 401 and the slow-down blades 403. When the UAV falls, the support turntable 4 pushes the slow-down blades 403 on the multiple horizontal support arms 401 in the opposite direction to rotate around the multilateral support rod 201 through air resistance, so as to generate a certain lift force to increase the falling resistance and reduce the falling speed, so that the UAV fails and falls. The turntable 4, the multiple horizontal arms 401 and the slow-descent blades 403 constitute a multi-blade single rotor structure that can rotate around the center. The whole structure can be tilted to a certain angle to the rear side, so that the slow-descent blades 403 on the multiple horizontal arms 401 can be pushed in the reverse direction by air resistance to rotate around the multilateral support rod 201 when the drone falls, and at the same time provide a component force to the front side, so that the drone as a whole can fly forward while falling, so as to further reduce the falling speed. The drone is also provided with a foldable horizontal flying wing structure, which can unlock the electromagnet 80 when the drone fails. 6 loses power and the locking magnetic buckle 805 on the horizontal folding rod 8 loses its magnetic attraction and locking, the unfolding spring 802 will drive the horizontal folding rod 8 to rotate outward along the folding shaft 801 and unfold, and pull the curved film 804 on the inner side of the storage groove 803 so that the curved film 804 is opened in a fan shape as a whole, thereby forming a horizontal flying wing structure on both sides of the main body 1 of the drone. When the drone as a whole is falling and flying towards the front, a certain resistance and lift are provided to further reduce the falling speed and improve the overall stability of the drone, which is conducive to further improving the safety of the drone.

[0049] When in use, the drone is connected to the fixed motor support 6 through multiple horizontal support arms 401 arranged around the outer side of the support turntable 4 to form a multi-rotor flight structure, and the lift generated by the rotation of the power blades 603 driven by the lifting motor 601 installed on the motor support 6 is used for flight. When the drone malfunctions and falls, the lifting motor 601 and the power blades 603 stop rotating, and the locking electromagnet 304 also loses power. The elastic locking pin 303 loses its magnetic force and retracts the locking sleeve 302 to disengage from the locking slot 701. The sliding locking ring 7 is unlocked and pushed by the unlocking spring 703 to slide downward to disengage from the embedded locking slot 301, thereby separating the sliding locking ring 7 and the fixed locking ring 3 from each other to dynamically unlock the multilateral support rod 201, so that the multilateral support rod 201 can rotate normally. Then, when the UAV falls, the support turntable 4 pushes the slow-descent blades 403 on the multiple horizontal support arms 401 in the opposite direction through the air resistance to rotate around the multilateral support rod 201, so as to generate a certain lift force to increase the falling resistance and reduce the falling speed. At the same time, the magnetic elastic pin 104 loses the magnetic repulsion and moves downward to retract the center locking sleeve 103 and disengage from the center locking groove 203, so that the tilt spring 204 will rotate backward along the tilt axis 202 through the rotating support seat 2, and the rotation angle is limited by the tilt limit block 106, so that the support turntable 4, multiple horizontal support arms 401 and the slow-descent blade 403 constitute a multi-blade single rotor structure that can rotate around the center and tilt backward at a certain angle, so that it is convenient for the multi-blade single rotor structure to be pushed in the opposite direction by air resistance when the UAV falls. The slow-down blades 403 on the horizontal support arms 401 rotate around the multilateral support rods 201 and provide a force component to the front side, so that the drone as a whole flies forward while falling. The sliding locking ring 7 slides downward to unlock the rotation of the multilateral support rods 201. At the same time, the variable pitch pull rod 704 pulls the slow-down blades 403 to rotate a certain angle along the support connecting shaft 402, so that the slow-down blades 403 can be adjusted from a horizontal state to an inclined state to increase the lift generated during rotation. When the horizontal support arms 401 and the slow-down blades 403 rotate, the centrifugal unlocking block 506 is pushed outward by the centrifugal force to stagger with the telescopic elastic pin 505, so that the telescopic elastic pin 505 can move downward to disengage from the telescopic locking slot 501 to unlock the telescopic support rod 502. 02 slides outward along the telescopic sleeve 5 to extend the overall length of the horizontal support arm 401, and pulls the extension blade 405 to slide outward along the nested storage groove 404 to extend the overall length of the slow-down blade 403, thereby increasing the overall area of ​​the slow-down blade 403, so as to further improve the resistance during landing and the lift generated by the rotation of the slow-down blade 403. At the same time, after the locking magnetic buckle 805 on the horizontal folding rod 8 loses its magnetic adsorption lock, the unfolding spring 802 drives the horizontal folding rod 8 to rotate outward along the folding shaft 801 and unfold, and pulls the arc-shaped film 804 on the inner side of the embedded storage groove 803, so that the arc-shaped film 804 is fan-shaped as a whole to form a horizontal flying wing structure on both sides of the main body 1 of the drone. When the drone as a whole is falling and flying forward,Provide a certain amount of resistance and lift to further reduce the falling speed, so that the drone can land slowly as a whole, thus avoiding falling accidents.

[0050] A method for using an anti-fall slow-down drone, comprising the following steps: when a power failure occurs in the drone, the lifting motor 601 and the power blade 603 stop rotating, and at the same time the locking electromagnet 304 loses power, the elastic locking pin 303 loses its magnetic force and adsorbs and retracts the locking sleeve 302 to disengage from the locking slot 701, and the sliding locking ring 7 is unlocked and pushed by the unlocking spring 703 to slide downward to disengage from the embedded locking slot 301, thereby separating the sliding locking ring 7 and the fixed locking ring 3 from each other to dynamically unlock the multilateral support rod 201 so that it can rotate normally, and then the support turntable 4 pushes the slow-down blades 403 on the multiple horizontal support arms 401 in the opposite direction to rotate around the multilateral support rod 201 through air resistance when the drone falls, so as to generate a certain lift force to increase the falling resistance and reduce the falling speed, so that the drone as a whole can land slowly to avoid a falling accident.

[0051] The anti-fall slow-down drone provided by the present invention is connected to a fixed motor support 6 through multiple horizontal support arms 401 arranged around the outer side of the support turntable 4, so that the lift generated by the rotation of the power blades 603 driven by the lifting motor 601 installed on the motor support 6 forms a multi-rotor flight structure, and the horizontal support arms 401 are also provided with slow-down blades 403. The entire support turntable 4 and the multiple slow-down blades 403 form a multi-blade structure, and the support turntable 4 is interconnected with the main body 1 through the multilateral support rods 201 and the rotating support seat 2. During normal flight, the multilateral support rods 201 The sliding locking ring 7 and the fixed locking ring 3 are engaged with each other to keep them locked and fixed. When the drone malfunctions, the sliding locking ring 7 can slide downward to unlock the multilateral support rod 201, so that the multilateral support rod 201 can rotate normally, and then the support turntable 4 can push the slow-descent blades 403 on the multiple horizontal support arms 401 in the opposite direction to rotate around the multilateral support rod 201 through air resistance when the drone falls, so as to generate a certain lift force to increase the falling resistance and reduce the falling speed, so that the drone as a whole can land slowly, thereby avoiding falling accidents and improving the safety of the drone.

[0052] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples. Within the scope of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0053] The present invention is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An anti-fall slow-descent drone, comprising a main body (1), a rotating support seat (2) being provided at the center of the main body (1), characterized in that: Also includes: A polygonal support rod (201) is rotatably arranged above the rotating support seat (2); a fixed locking ring (3) is arranged around the outer side of the polygonal support rod (201); the fixed locking ring (3) is fixedly connected to the main body (1); and a fitting locking groove (301) is provided at the center of the fixed locking ring (3); A support turntable (4) is fixedly arranged at the top end of the polygonal support rod (201); a plurality of horizontal support arms (401) are evenly arranged around the outer side of the support turntable (4) in a circular shape; a slow-down blade (403) is horizontally arranged in the middle of the horizontal support arm (401); and a motor support (6) is arranged at the outer end of the horizontal support arm (401); A sliding locking ring (7) is arranged in the middle of the locking groove (301), a center sleeve (702) is arranged at the center of the sliding locking ring (7), the sliding locking ring (7) is slidably connected to the multilateral support rod (201) through the center sleeve (702), an unlocking spring (703) is arranged above the sliding locking ring (7), a locking groove (701) is arranged at the center of the outer side of the sliding locking ring (7), a locking sleeve (302) is arranged in the middle of the fixed locking ring (3), an elastic locking pin (303) is arranged on the inner side of the locking sleeve (302), a locking electromagnet (304) is arranged in the middle of the locking groove (701), and the elastic locking pin (303) and the locking groove (701) are mutually engaged to lock the sliding locking ring (7).

2. The anti-fall slow-down drone according to claim 1, characterized in that: The bottom rear end of the rotating support seat (2) is provided with a tilting shaft (202), and the rotating support seat (2) is rotatably connected to the main body (1) through the tilting shaft (202). The axial center line of the tilting shaft (202) is parallel to the horizontal center line of the main body (1). The rear side of the rotating support seat (2) is provided with a tilting limit block (106), and the tilting limit block (106) is fixedly connected to the main body (1). When the rotating support seat (2) tilts and rotates toward the rear side along the tilting shaft (202), the rotation angle is limited by the tilting limit block (106). The front side of the rotating support seat (2) is provided with a tilting spring (204).

3. The anti-fall slow-down drone according to claim 1, characterized in that: A central locking sleeve (103) is provided below the rotating support seat (2), a magnetic elastic pin (104) is provided inside the central locking sleeve (103), a central electromagnet (105) is provided at the bottom end of the central locking sleeve (103), a central locking groove (203) is provided at the bottom center of the rotating support seat (2), the dimensions of the central locking groove (203) and the magnetic elastic pin (104) are matched with each other, and the rotating support seat (2) is kept vertically locked by the mutual engagement of the magnetic elastic pin (104) and the central locking groove (203).

4. The anti-fall slow-down drone according to claim 1, characterized in that: A corrugated flexible sleeve (101) is provided around the outer side of the rotating support seat (2); the bottom end of the corrugated flexible sleeve (101) is fixedly connected to the main body (1); the top end of the corrugated flexible sleeve (101) is provided with a rotating connection ring (102); the corrugated flexible sleeve (101) is rotatably connected to the supporting turntable (4) via the rotating connection ring (102).

5. The anti-fall slow-down drone according to claim 1, characterized in that: A telescopic sleeve (5) is horizontally arranged inside the horizontal support arm (401), a telescopic support rod (502) is nested and slidably arranged inside the telescopic sleeve (5), the outer end of the telescopic support rod (502) is fixedly connected to the motor support (6), a nested storage groove (404) is arranged inside the slow-down blade (403), an extension blade (405) is nested and slidably arranged inside the nested storage groove (404), and the outer end of the extension blade (405) is connected to the telescopic support rod (502).

6. The anti-fall slow-down drone according to claim 5, characterized in that: A vertical locking sleeve (503) is provided in the middle of the telescopic support rod (502), and a telescopic elastic pin (505) is slidably provided on the inner side of the vertical locking sleeve (503), and a telescopic locking groove (501) is provided in the middle of the telescopic sleeve (5), and the dimensions of the telescopic elastic pin (505) and the telescopic locking groove (501) are matched with each other. A horizontal locking sleeve (504) is horizontally provided at the lower end of the vertical locking sleeve (503), and a centrifugal unlocking block (506) is slidably provided on the inner side of the horizontal locking sleeve (504), and a centrifugal spring (507) is provided at the outer end of the centrifugal unlocking block (506), and the top surface of the centrifugal unlocking block (506) is in contact with the bottom surface of the telescopic elastic pin (505), and the telescopic elastic pin (505) is restricted from moving downward and disengaging from the telescopic locking groove (501) by the centrifugal unlocking block (506).

7. The anti-fall slow-down drone according to claim 1, characterized in that: A support connecting shaft (402) is provided at the inner end of the horizontal support arm (401), and the horizontal support arm (401) is rotatably connected to the support turntable (4) through the support connecting shaft (402). A plurality of pitch-changing pull rods (704) are arranged around the top of the sliding locking ring (7), and the pitch-changing pull rods (704) are arranged in a one-to-one correspondence with the slow-down blades (403). The upper and lower ends of the pitch-changing pull rods (704) are rotatably connected to the slow-down blades (403) and the pitch-changing pull rods (704) respectively. When the sliding locking ring (7) slides downward, the pitch-changing pull rods (704) pull the slow-down blades (403) to rotate a certain angle along the support connecting shaft (402).

8. The anti-fall slow-descent UAV according to claim 1, characterized in that: The main body (1) is symmetrically provided with a horizontal folding rod (8) in parallel with the left and right sides. The front end of the horizontal folding rod (8) is provided with a folding shaft (801). The horizontal folding rod (8) is rotatably connected to the main body (1) through the folding shaft (801). The vertical center line of the folding shaft (801) is parallel to the vertical center line of the main body (1). The outer side of the horizontal folding rod (8) is connected with an unfolding spring (802). The middle of the horizontal folding rod (8) is provided with a chiming receiving groove (803). The inner side of the chiming receiving groove (803) is folded and chime-connected with an arc film (804). The inner and outer ends of the arc film (804) are respectively fixedly connected to the main body (1) and the horizontal folding rod (8). The rear end of the horizontal folding rod (8) is provided with a locking magnetic buckle (805). The inner side of the locking magnetic buckle (805) is provided with an unlocking electromagnet (806).

9. The anti-fall slow-descent UAV according to claim 1, characterized in that: A lifting motor (601) is provided in the middle of the motor support (6), a storage shaft (602) is symmetrically connected to the shaft end of the lifting motor (601), and a power blade (603) is rotatably connected to the outer side of the storage shaft (602).

10. A method for using the anti-fall slow-down drone according to any one of claims 1 to 9, characterized in that: The invention comprises the following steps: when a power failure occurs in the drone, the lifting motor (601) and the power blade (603) stop rotating, and the locking electromagnet (304) loses power at the same time, the elastic locking pin (303) loses magnetic force and adsorbs and retracts the locking sleeve (302) to disengage from the locking slot (701), and the sliding locking ring (7) is unlocked and pushed by the unlocking spring (703) to slide downward and disengage from the embedded locking slot (301), thereby separating the sliding locking ring (7) and the fixed locking ring (3) from each other to dynamically unlock the multilateral support rod (201) so that it can rotate normally, and then the supporting turntable (4) pushes the slow-descent blades (403) on the multiple horizontal support arms (401) in the opposite direction through air resistance when the drone falls, so as to generate a certain lift force, increase the falling resistance and reduce the falling speed, so that the drone as a whole can land slowly to avoid a falling accident.

Images