CN111824402B - Unmanned aerial vehicle - Google Patents
Unmanned aerial vehicle Download PDFInfo
- Publication number
- CN111824402B CN111824402B CN202010720768.1A CN202010720768A CN111824402B CN 111824402 B CN111824402 B CN 111824402B CN 202010720768 A CN202010720768 A CN 202010720768A CN 111824402 B CN111824402 B CN 111824402B
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- arm
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- buffer
- base
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- 230000033001 locomotion Effects 0.000 claims abstract description 16
- 230000007246 mechanism Effects 0.000 claims abstract description 16
- 230000003139 buffering effect Effects 0.000 abstract description 9
- 230000006872 improvement Effects 0.000 description 21
- 239000003638 chemical reducing agent Substances 0.000 description 4
- 230000000149 penetrating effect Effects 0.000 description 4
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C25/00—Alighting gear
- B64C25/32—Alighting gear characterised by elements which contact the ground or similar surface
- B64C25/58—Arrangements or adaptations of shock-absorbers or springs
- B64C25/62—Spring shock-absorbers; Springs
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C1/00—Fuselages; Constructional features common to fuselages, wings, stabilising surfaces or the like
- B64C1/30—Parts of fuselage relatively movable to reduce overall dimensions of aircraft
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Aviation & Aerospace Engineering (AREA)
- Forklifts And Lifting Vehicles (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The invention discloses an unmanned aerial vehicle, which comprises a body and a base. The machine body is provided with a paddle arm, a paddle and an adjusting mechanism, and a first buffer assembly and a second buffer assembly are arranged on the base. According to the invention, the paddle arm is connected with the first connecting arm, the paddle arm stretches and contracts through the horizontal movement of the first connecting arm, and is fixed through the fixing device, so that the telescopic performance of the paddle arm is realized; in addition, the invention also provides a first buffer assembly and a second buffer assembly, wherein the first buffer assembly can play a role in buffering in the vertical direction due to the existence of the first buffer spring when the unmanned aerial vehicle descends; the second buffer assembly can be outwards unfolded when falling, plays an auxiliary buffer role, can ensure the stability of the unmanned aerial vehicle and prevent toppling, and effectively solves the problems in the prior art.
Description
Technical Field
The invention relates to an unmanned aerial vehicle.
Background
The unmanned plane has the advantages of flexibility, quick response, no piloting and low operation requirement, can realize real-time image transmission and high-risk area detection functions by carrying various sensors or camera equipment, is a powerful supplement of satellite remote sensing and traditional aviation remote sensing, and has wide application range to three fields of military, scientific research and civil use at present, in particular to the fields of electric power communication, weather, agriculture, sea, exploration, photography, disaster prevention and reduction, crop estimation, anti-toxicity and anti-terrorism, border patrol, security and anti-terrorism and the like.
Unmanned aerial vehicle among the prior art has following problem at least:
(1) The buffering mechanism can only buffer the bottom of the unmanned aerial vehicle, the angle is single, the buffering function is limited, and the buffering effect is poor;
(2) The paddle arms of the unmanned aerial vehicle are mostly fixed, so that the unmanned aerial vehicle is large in size and poor in portability. In addition, in actual operation, if the blades of the unmanned aerial vehicle are of fixed specification dimensions, the pitch of the blades is not adjustable. When the unmanned aerial vehicle needs to be operated again or the requirement on the endurance is high, the operation power consumption is overlarge due to insufficient blade specifications, and the performance of the unmanned aerial vehicle is affected.
Disclosure of Invention
The invention aims to provide an unmanned aerial vehicle which is good in buffering effect and capable of achieving paddle arm extension and contraction.
In order to solve the problems, the invention provides an unmanned aerial vehicle, which comprises a body and a base, and is characterized in that,
At least two paddle arms are arranged at the top of the machine body, and the paddle arms are symmetrically arranged; the paddle arm is provided with a paddle blade arranged on the paddle arm and a power device for driving the paddle blade to rotate; at least two adjusting mechanisms are also installed on the machine body, each adjusting mechanism corresponds to the paddle arm, and each adjusting mechanism is provided with: the connecting arm is coaxially arranged with the paddle arm and is fixedly connected with the paddle arm; the driving device is used for driving the connecting arm to do telescopic motion along the axis of the connecting arm; a securing means for securing the paddle arm to the fuselage;
the base below is provided with first buffer assembly and second buffer assembly, wherein:
-the first cushioning assembly comprises a first support column fixed in a central position below the base, and a cushioning seat mounted below the first support column, the first support column being at least partially insertable into the cushioning seat and slidable therein in a vertical direction, a first cushioning spring being connected between the cushioning seat and the base;
-the second buffer assembly is provided with four at least, and it evenly sets up along base lower surface circumference, the second buffer assembly is including fixing in the base below and telescopic flexible arm to and rotate the swinging boom of connecting on flexible arm bottom free end, be provided with on the flexible arm and be used for its second buffer spring that provides the buffering power when flexible upward, the swinging boom is provided with the buffering when its bottom free end upward movement by the third buffer spring.
As a further development of the invention, each of the adjusting mechanisms is provided with:
A fixing plate mounted on the body;
rotating discs connected to the fixed plate, wherein the rotating discs are driven to rotate by a rotating shaft;
the first lug is arranged on the surface of the turntable;
the second protruding block is arranged on the fixed plate;
The driving lever is rotationally connected to the fixed plate through the second protruding block, a driving groove parallel to the axis of the driving lever is formed in the driving lever, the first protruding block is located in the driving groove, and one free end of the driving lever is further provided with a first toothed section with one arc-shaped end;
The sliding rod is connected to the fixed plate in a sliding way, and the axial direction of the sliding rod is perpendicular to the connecting line of the first lug and the second lug;
the second toothed segment is fixed on the sliding rod and is of a strip-shaped structure, and the second toothed segment is parallel to the axis of the sliding rod and meshed with the first toothed segment;
The connecting rod is used for connecting the sliding rod with the connecting arm, and the connecting rod is a straight rod or a bent rod, and all the sliding rods are positioned in the same plane through connection of the connecting rod.
As a further improvement of the present invention, the telescopic arm has:
The first arm body is fixed on the lower surface of the base;
The second arm body is connected below the first arm body, the first arm body at least can partially extend into the second arm body and slide in the second arm body, the second buffer spring is sleeved on the first arm body, two ends of the second buffer spring are respectively limited between the end wall of the second arm body and the first annular baffle plate at the top of the first arm body, a through groove is formed in the bottom of the second arm body, and the rotating arm is rotatably connected in the through groove.
As a further improvement of the invention, the second buffer assembly further comprises a second connecting arm with two ends respectively connected with the second arm body and the rotating arm in a rotating way, the second connecting arm is provided with a third arm body connected with the second arm body in a rotating way, and a fourth arm body connected with the rotating arm in a rotating way, the fourth arm body can be inserted into the third arm body and slide in the third arm body, the third arm body and the fourth arm body are respectively provided with a second annular baffle, and the third buffer spring is limited in the second annular baffle.
As a further improvement of the invention, each of the second arm body and the rotating arm is correspondingly provided with two groups of second connecting arms and a third buffer spring, and the two groups of second connecting arms are symmetrically arranged along the axes of the second arm body and the rotating arm.
As a further improvement of the invention, the lower surface of the base is provided with four horizontal first sliding grooves along the circumferential direction, and two adjacent first sliding grooves are vertically arranged;
The first sliding groove is internally provided with a first sliding block capable of sliding in the first sliding groove, the first sliding block is perpendicular to the first sliding groove and is provided with a second sliding groove parallel to the axis of the first sliding block, and the first arm body is installed in the second sliding groove and can slide in the second sliding groove.
As a further improvement of the invention, at least two fixing sleeves are fixed on the machine body, the paddle arms are at least partially inserted into the through holes of the fixing sleeves, at least one fixing strip parallel to the axis of the paddle arms is arranged on the hole walls of the through holes, sliding grooves are formed in the paddle arms, and the fixing strips can relatively slide in the sliding grooves.
As a further improvement of the invention, the paddle arms are provided with four included angles.
As a further improvement of the invention, the paddle arm is provided with a first chute penetrating through the upper surface and the lower surface of the paddle arm, the fixed sleeve is provided with a second chute penetrating through the upper surface and the lower surface of the paddle arm, the fixed device is a fixed bolt and a fixed nut, and the fixed bolt penetrates through the first chute and the second chute and clamps the paddle arm and the fixed sleeve together with the fixed nut.
As a further improvement of the invention, the free end of the bottom of the rotating arm is provided with a universal joint, and the bottom of the universal joint is provided with a roller.
As a further improvement of the invention, an auxiliary connecting rod is fixedly connected to the connecting rod, and the sliding rod is connected with the connecting arm through the connecting rod or the auxiliary connecting rod.
As a further development of the invention, the rotary shaft is fixedly connected to a gear reducer, and the gear speed reducer is driven to rotate by a stepping motor.
As a further improvement of the invention, the bottom of the buffer seat is provided with a buffer cushion.
As a further improvement of the invention, a box body is arranged below the base, and the first buffer component and the second buffer component are positioned in the box body and can partially extend out of the box body.
The invention has the beneficial effects that the paddle arm is connected with the first connecting arm, the paddle arm stretches and contracts through the horizontal movement of the first connecting arm, and is fixed through the fixing device, so that the paddle arm can stretch and contract; the second buffer assembly can be outwards unfolded when falling, plays an auxiliary buffer role, can ensure the stability of the unmanned aerial vehicle and prevent toppling, and effectively solves the problems in the prior art.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic illustration of the connection of an adjustment mechanism to a paddle arm;
FIG. 3 is a schematic structural view of an adjustment mechanism;
Fig. 4 is a schematic structural view of a base in the present invention.
In the figure: 2-a fuselage; 3-a base; 4-paddle arms; 5-a first cushioning assembly; 502-a first support column; 504-a buffer seat; 506-a first buffer spring; 6-paddles; 602-a first connecting arm; 606-a fixed plate; 608—a turntable; 610-first bump; 612-second bump; 614—a lever; 616—toggle slots; 618-a first toothed segment; 620-a sliding bar; 621-a second toothed segment; 624-connecting rod; 626-auxiliary connecting rods; 7-a second cushioning assembly; 702—telescoping arms; 704-rotating arm; 708-a second buffer spring; 710-a third buffer spring; 712-first arm; 714-second arm; 716-a second connecting arm; 718-third arm; 720-fourth arm; 8-rotating shafts; 902-a first sliding groove; 904-a first slider; 906-a second chute; 10-fixing the sleeve; 1002-fixing strips; 11-a box body; 1202-fixing bolts; 1204-fixing the nut.
Detailed Description
The technical scheme of the invention is further described below by the specific embodiments with reference to the accompanying drawings.
As shown in fig. 1-4, the present invention comprises a body 2 and a base 3, characterized in that,
At least two paddle arms 4 are arranged at the top of the machine body 2, and the paddle arms 4 are symmetrically arranged; a paddle 6 arranged on the paddle arm 4 and a power device for driving the paddle 6 to rotate; at least two adjusting mechanisms are also mounted on the machine body 2, each adjusting mechanism corresponds to the paddle arm 4, and the adjusting mechanism comprises: a first connecting arm 602 coaxially disposed with and fixedly connected to the paddle arm 4; a driving device for driving the first connecting arm 602 to make telescopic motion along the axis thereof; fixing means for fixing the paddle arm 4 to the fuselage 2;
a first buffer assembly 5 and a second buffer assembly 7 are arranged below the base 3, wherein:
The first cushioning assembly 5 comprises a first support column 502 fixed in a central position below the base 3, and a cushioning seat 504 mounted below the first support column 502, the first support column 502 being at least partially insertable into the cushioning seat 504 and slidable therein in a vertical direction, a first cushioning spring 506 being connected between the cushioning seat 504 and the base 3;
The second buffer assemblies 7 are at least four, and are uniformly arranged along the circumference of the lower surface of the base 3, the second buffer assemblies 7 comprise telescopic arms 702 fixed below the base 3 and telescopic, and rotating arms 704 rotatably connected to the bottom free ends of the telescopic arms 702, the telescopic arms 702 are provided with second buffer springs 708 for providing buffer force when the telescopic arms 702 are telescopic upwards, and the rotating arms 704 are provided with buffer force when the bottom free ends of the rotating arms move upwards by third buffer springs 710.
As a further development of the invention, each of the adjusting mechanisms is provided with:
A fixing plate 606 mounted on the body 2;
a turntable 608 rotatably coupled to the fixed plate 606, a plurality of the turntables 608 being rotated by a rotation shaft 8;
a first bump 610 disposed on a surface of the turntable 608;
A second bump 612 disposed on the fixing plate 606;
the second protruding block 612 rotates a shift lever 614 connected to the fixed plate 606, a shift groove 616 parallel to the axis of the shift lever 614 is provided on the shift lever 614, the first protruding block 610 is located in the shift groove 616, and one free end of the shift lever 614 is further provided with a first toothed segment 618 with an arc end;
a sliding rod 620 slidably connected to the fixed plate 606, wherein an axial direction of the sliding rod 620 is perpendicular to a connection line between the first bump 610 and the second bump 612;
A second toothed segment 621 fixed to the sliding rod 620 and having a bar-shaped structure, the second toothed segment 621 being parallel to the axis of the sliding rod 620 and engaged with the first toothed segment 618;
A connecting rod 624 connecting the sliding rod 620 with the first connecting arm 602, wherein the connecting rod 624 is a straight rod or a bent rod, and all the sliding rods 620 are located in the same plane through connection.
As a further improvement of the present invention, the telescopic arm 702 has:
a first arm 712 fixed to the lower surface of the base 3;
The second arm body 714 is connected below the first arm body 712, the first arm body 712 can at least partially extend into the second arm body 714 and slide therein, the second buffer spring 708 is sleeved on the first arm body 712, two ends of the second buffer spring 708 are respectively limited between the end wall of the second arm body 714 and the first annular baffle plate at the top of the first arm body 712, a through groove is formed at the bottom of the second arm body 714, and the rotating arm 704 is rotatably connected in the through groove.
As a further improvement of the present invention, the second buffer assembly 7 further includes a second connecting arm 716 rotatably connected to the second arm 714 and the rotating arm 704 at both ends, the second connecting arm 716 is provided with a third arm 718 rotatably connected to the second arm 714, and a fourth arm 720 rotatably connected to the rotating arm 704, the fourth arm 720 is capable of being inserted into the third arm 718 and sliding therein, and a second annular baffle is provided on each of the third arm 718 and the fourth arm 720, and the third buffer spring 710 is limited in the second annular baffle.
As a further improvement of the present invention, each of the second arm 714 and the rotating arm 704 is correspondingly provided with two sets of second connecting arms 716 and a third buffer spring 710, and the two sets of second connecting arms 716 are symmetrically arranged along the axes of the second arm 714 and the rotating arm 704.
As a further improvement of the invention, the lower surface of the base 3 is provided with four horizontal first sliding grooves 902 along the circumferential direction, and two adjacent first sliding grooves 616 are vertically arranged;
The first sliding groove 616 is provided with a first sliding block 904 capable of sliding therein, the first sliding block 904 is arranged perpendicular to the first sliding groove 616, the first sliding block is provided with a second sliding groove 906 parallel to the axis of the first sliding block, and the first arm 712 is mounted in the second sliding groove 906 and can slide therein.
As a further improvement of the invention, at least two fixing sleeves 10 are fixed on the machine body 2, the paddle arms 4 are at least partially inserted into through holes of the fixing sleeves 10, at least one fixing strip 1002 parallel to the axis of the paddle arms 4 is arranged on the hole wall of each through hole, a sliding groove is arranged on each paddle arm 4, and the fixing strips 1002 can relatively slide in the sliding grooves.
As a further improvement of the invention, the paddle arms 4 are provided with four included angles.
As a further improvement of the invention, the paddle arm 4 is provided with a first sliding groove 616 penetrating through the upper surface and the lower surface, the fixing sleeve 10 is provided with a second sliding groove 906 penetrating through the upper surface and the lower surface, the fixing device is a fixing bolt 1202 and a fixing nut 1204, and the fixing bolt 1202 passes through the first sliding groove 616 and the second sliding groove 906 to clamp the paddle arm 4 and the fixing sleeve 10 together with the fixing nut 1204.
As a further improvement of the invention, the free end of the bottom of the rotating arm 704 is provided with a universal joint, and the bottom of the universal joint is provided with a roller.
As a further development of the invention, an auxiliary connecting rod 626 is also fixedly connected to the connecting rod 624, and the sliding rod 620 is connected to the connecting arm 602 via the connecting rod 624 or the auxiliary connecting rod 626.
As a further development of the invention, the rotary shaft 8 is fixedly connected to a gear reducer, which is driven in rotation by a stepper motor.
As a further improvement of the present invention, a cushion pad is disposed at the bottom of the cushion seat 504.
As a further improvement of the present invention, a box 11 is further disposed below the base 3, and the first buffer component 5 and the second buffer component 7 are located in the box 11 and can partially extend out of the box 11.
1. Telescoping movement of the paddle arm 4:
(1) When the paddle arm 4 is required to stretch, the fixing bolt 1202 and the fixing nut 1204 are loosened;
(2) The motor rotates, torque is transmitted to the rotating shaft 8 through the gear reducer, and four turntables 608 are connected to the rotating shaft 8, so that the turntables 608 are driven to rotate simultaneously (of course, the rotating shaft 8 can also be driven to rotate manually);
(3) When the rotary table 608 rotates, the driving rod 614 is driven to move, the driving rod 614 drives the sliding rod 620 to do reciprocating motion in one circular motion, namely, the driving rod 614 is driven to do one-way linear motion every 180 degrees of rotation of the rotary table 608, and the total distance of the motion is certain, so that the distance of the motion can be converted into 1 degree of no motion, the distance of the sliding rod 620 can be moved, and finally, the rotating angle of the rotary table 608 can be calculated according to the distance of the motion required;
(4) In the present invention, the four paddle arms 4 are arranged in the same horizontal plane, but because the turntable 608 cannot be located in the same horizontal plane, a straight bar structure connecting rod 624 and a bent bar structure connecting rod 624 need to be arranged, wherein one sliding bar 620 is connected with the straight bar structure connecting rod 624, and the other three sliding bars 620 are connected with the bent bar structure connecting rod 624, so that the four paddle arms 4 are located in the same plane;
(5) After moving into place, the fixing bolt 1202 and the fixing nut 1204 are tightened.
2. Buffering of base 3:
(1) When the unmanned aerial vehicle falls, the buffer seat 504 in the first buffer assembly 5 is firstly contacted with the ground, the bottom of the buffer seat 504 is provided with a rubber buffer pad which can firstly play a part in damping, after the buffer seat 504 is contacted with the ground, the ground gives an upward acting force to the buffer seat 504, the buffer seat 504 slides upwards relative to the first support column 502, and the first buffer spring 506 is compressed to generate elastic deformation, so that the buffer effect is played, and the spring force of the first buffer spring 506 ensures that the buffer seat 504 is not contacted with the bottom of the base 3;
(2) Thereafter, the second cushioning assembly 7 is in contact with the ground, and the contact of the second cushioning assembly 7 with the ground will result in three movements:
a. Firstly, the rotating arm 704 is driven to rotate around the second arm 714, at this time, the bottom of the rotating arm 704 is outwards spread, because the bottom of the rotating arm 704 is provided with a universal joint and a roller, at this time, the friction force with the ground is small, and the rotating movement of the rotating arm 704 is buffered by the third buffer spring 710;
b. When the rotating arm 704 moves to the maximum limit, the force acting on the rotating arm 704 will be decomposed into a first component force vertically upwards and a second component force horizontally outwards, and the first component force will enable the second arm 714 to move upwards relative to the first arm 712, so as to compress the second spring and play a role of buffering;
c. The second component force will drive the first arm 712 to slide in the second sliding groove and the first slider 904 to slide in the first sliding groove 902, thereby spreading out;
the technical principle of the present invention is described above in connection with the specific embodiments. The description is made for the purpose of illustrating the general principles of the invention and should not be taken in any way as limiting the scope of the invention. Other embodiments of the invention will be apparent to those skilled in the art from consideration of this specification without undue burden.
Claims (8)
1. An unmanned aerial vehicle comprises a machine body (2) and a base (3), and is characterized in that at least two paddle arms (4) are arranged at the top of the machine body (2), and the paddle arms (4) are symmetrically arranged; the paddle arm is provided with a paddle (6) and a power device for driving the paddle (6) to rotate; at least two adjusting mechanisms are also installed on the machine body, each adjusting mechanism corresponds to the paddle arm (4), and each adjusting mechanism is provided with: a first connecting arm (602) coaxially arranged with the paddle arm (4) and fixedly connected with the paddle arm; a driving device for driving the first connecting arm (602) to do telescopic motion along the axis; -fixing means for fixing the paddle arm (4) to the fuselage (2); the base (3) below is provided with first buffer assembly (5) and second buffer assembly (7), wherein: -the first cushioning assembly (5) comprises a first support column (502) fixed in a central position below the base (3), and a cushioning seat (504) mounted below the first support column (502), the first support column (502) being at least partially insertable into the cushioning seat (504) and slidable therein in a vertical direction, a first cushioning spring (506) being connected between the cushioning seat (504) and the base (3); -the second buffer assembly (7) is provided with at least four, which are uniformly arranged along the circumference of the lower surface of the base (3), the second buffer assembly (7) comprises a telescopic arm (702) which is fixed below the base (3) and can be telescopic, and a rotating arm (704) which is rotatably connected on the free end at the bottom of the telescopic arm (702), the telescopic arm (702) is provided with a second buffer spring (708) for providing buffer force when the telescopic arm (702) stretches upwards, and the rotating arm (704) is provided with buffer when the free end at the bottom of the rotating arm moves upwards by a third buffer spring (710); each of the adjusting mechanisms is provided with: a fixed plate (606) mounted on the fuselage (2); a turntable (608) rotatably connected to the fixed plate (606), a plurality of the turntables (608) being driven to rotate by one rotation shaft (8); a first bump (610) disposed on a disk surface of the turntable (608); a second bump (612) provided on the fixing plate (606); the poking rod (614) is rotatably connected to the fixed plate (606) through the second protruding block (612), a poking groove (616) parallel to the axis of the poking rod is arranged on the poking rod (614), the first protruding block (610) is positioned in the poking groove (616), and one free end of the poking rod (614) is further provided with a section of arc-shaped first toothed section (618); a sliding rod (620) slidably connected to the fixed plate (606), wherein the axial direction of the sliding rod (620) is perpendicular to the connecting line of the first bump (610) and the second bump (612); a second toothed segment (621) fixed to the sliding rod (620) and having a bar-shaped structure, the second toothed segment (621) being parallel to the axis of the sliding rod (620) and meshing with the first toothed segment (618); and a connecting rod (624) connecting the sliding rod (620) with the first connecting arm (602), wherein the connecting rod (624) is a straight rod or a bent rod, and all the sliding rods (620) are positioned in the same plane through the connection.
2. A drone according to claim 1, wherein the telescopic arm (702) has: a first arm body (712) fixed on the lower surface of the base (3); the second arm body (714) of connection in first arm body (712) below, first arm body (712) can at least partly stretch into in second arm body (714) and slide therein, second buffer spring (708) cover is established on first arm body (712), its both ends are restricted respectively between the end wall of second arm body (714) and the first annular baffle at first arm body (712) top, second arm body (714) bottom is provided with the link up the groove, swinging arm (704) rotate and connect link up in the link up the inslot.
3. An unmanned aerial vehicle according to claim 2, wherein the second buffer assembly (7) further comprises a second connecting arm (716) with two ends respectively rotatably connected to the second arm (714) and the rotating arm (704), the second connecting arm (716) is provided with a third arm (718) rotatably connected to the second arm (714), and a fourth arm (720) rotatably connected to the rotating arm (704), the fourth arm (720) is insertable into the third arm (718) and slides therein, the third arm (718) and the fourth arm (720) are each provided with a second annular baffle, and the third buffer spring (710) is limited in the second annular baffle.
4. A drone according to claim 3, wherein each of the second arm (714) and the rotary arm (704) is provided with two sets of second connecting arms (716) and third buffer springs (710) respectively, and the two sets of second connecting arms (716) are symmetrically arranged along the axes of the second arm (714) and the rotary arm (704).
5. The unmanned aerial vehicle according to claim 4, wherein four horizontal first sliding grooves (902) are uniformly formed in the lower surface of the base (3) along the circumferential direction, and two adjacent first sliding grooves (902) are vertically arranged; the first sliding groove (902) is internally provided with a first sliding block (904) capable of sliding in the first sliding groove, the first sliding block (904) is perpendicular to the first sliding groove (902) and is provided with a second sliding groove (906) parallel to the axis of the first sliding block, and the first arm body (712) is installed in the second sliding groove (906) and can slide in the second sliding groove.
6. An unmanned aerial vehicle according to claim 5, wherein at least two fixing sleeves (10) are fixed to the fuselage (2), the paddle arms (4) are at least partially inserted into through holes of the fixing sleeves (10), at least one fixing strip (1002) parallel to the axis of the paddle arms (4) is arranged on the wall of each through hole, a sliding groove (402) is arranged on each paddle arm (4), and the fixing strips (1002) can slide relatively in the sliding grooves (402).
7. An unmanned aerial vehicle according to claim 6, wherein the number of the paddles (4) is four and the angle between them is 90 degrees.
8. A unmanned aerial vehicle according to claim 7, wherein the free end of the base of the swivel arm (704) is provided with a universal joint, the base of which is provided with a roller.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010720768.1A CN111824402B (en) | 2020-07-24 | 2020-07-24 | Unmanned aerial vehicle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010720768.1A CN111824402B (en) | 2020-07-24 | 2020-07-24 | Unmanned aerial vehicle |
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| CN111824402A CN111824402A (en) | 2020-10-27 |
| CN111824402B true CN111824402B (en) | 2024-05-31 |
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| CN210364356U (en) * | 2019-07-02 | 2020-04-21 | 詹恭强 | Unmanned aerial vehicle's descending support |
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| GB2428650B (en) * | 2005-08-04 | 2011-01-12 | Messier Dowty Ltd | Landing gear |
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