1. The utility model provides an unmanned for helicopter angle adjustable searchlighting device, includes organism (1), its characterized in that: a driving box (2) is fixedly installed at the bottom of the machine body (1), a connecting cylinder (3) is fixedly installed at the bottom of the driving box (2), a transmission box (4) is fixedly installed at the bottom of the connecting cylinder (3), and a searchlight (5) is movably arranged below the transmission box (4);

the outer wall fixed mounting of drive box (2) has electric putter (6), connects the drive arrangement between electric putter (6) and searchlight (5), drives searchlight (5) and rotates round transmission box (4).

2. The angle-adjustable searchlight device for the unmanned helicopter of claim 1, characterized in that: the driving device comprises a moving rod (7), a drawing cylinder (8), a rack (9), a gear (12), a rotating shaft (13) and a connecting rod (14), the moving rod (7) is fixedly installed at the top of an output shaft of the electric push rod (6), the drawing cylinder (8) is inserted into the bottom of the moving rod (7), the rack (9) is fixedly installed at the bottom of the drawing cylinder (8), the gear (12) is meshed with the bottom of the rack (9), the rotating shaft (13) is fixedly installed at the center of the gear (12), and two ends of the rotating shaft (13) are rotatably arranged on the inner wall of the transmission box (4);

the outer walls of the two ends of the rotating shaft (13) are fixedly provided with connecting rods (14), and the tail ends of the connecting rods (14) extend to the outside of the transmission box (4) and are fixedly connected with the searchlight (5).

3. The angle-adjustable searchlight device for the unmanned helicopter of claim 2, characterized in that: the inside of rack (9) is pegged graft and is had guide bar (36), the equal fixed mounting in both ends of guide bar (36) is on the inner wall of holding ring (10), holding ring (10) set up on the inner wall of annular cabinet (11), annular cabinet (11) fixed mounting is on the inner wall of connecting cylinder (3).

4. The angle-adjustable searchlight device for the unmanned helicopter of claim 3, characterized in that: the outer wall of the transmission box (4) is provided with a movable groove (15), the tail ends of the two connecting rods (14) penetrate through the movable groove (15) and are fixedly connected with the searchlight (5), and an elastic rubber pad (16) is fixedly arranged on the left side of the inner wall of the movable groove (15).

5. The angle-adjustable searchlight device for the unmanned helicopter of claim 4, characterized in that: the utility model discloses a transmission box, including holding ring (10), top and interior roof of holding ring (10), holding ring (10) slide to set up on the inner wall of annular cabinet (11), fixedly connected with second spring (24) between the top of holding ring (10) and the interior roof of annular cabinet (11), the bottom of holding ring (10) is provided with annular gasbag (23), the outer wall of annular gasbag (23) is provided with main trachea (22), the end of main trachea (22) extends to the outside of transmission box (4).

6. The angle-adjustable searchlight device for the unmanned helicopter of claim 5, characterized in that: an air duct (18) is fixedly mounted on the outer wall of the connecting cylinder (3), a fan cover (17) is fixedly mounted at the tail end of the air duct (18), a filter screen (19) is fixedly mounted on the inner wall of the fan cover (17), a piston (20) is movably arranged on the inner wall of the air duct (18), and a first spring (21) is fixedly connected between the outer wall of the piston (20) and the inner wall of the connecting cylinder (3);

the tail end of the main air pipe (22) is communicated with the air duct (18).

7. The angle-adjustable searchlight device for the unmanned helicopter of claim 6, characterized in that: a branch air pipe (27) is fixedly mounted at the bottom of the air duct (18), a second control valve (28) is arranged inside the branch air pipe (27), a first control valve (25) is arranged inside the main air pipe (22), a distance sensor (29) is fixedly mounted on the outer wall of the connecting duct (3), and the mounting position of the distance sensor (29) corresponds to the position of the piston (20);

the output end of the distance sensor (29) is electrically connected with a controller, and the output end of the controller is respectively electrically connected with the input ends of the first control valve (25) and the second control valve (28).

8. The angle-adjustable searchlight device for the unmanned helicopter of claim 7, characterized in that: a bottom barrel (26) is fixedly mounted at the bottom of the air barrel (18), the branch air pipe (27) is arranged inside the bottom barrel (26), a pressure plate (30) is movably arranged on the inner wall of the bottom barrel (26), and a third spring (31) is fixedly connected between the bottom of the pressure plate (30) and the inner bottom wall of the bottom barrel (26);

and a microswitch (32) is also fixedly arranged on the inner bottom wall of the bottom barrel (26).

9. The angle-adjustable searchlight device for the unmanned helicopter of claim 8, characterized in that: the bottom fixed mounting of connecting cylinder (3) has water tank (33), the inside of water tank (33) is stored with the coolant liquid, the interior diapire fixed mounting of water tank (33) has water pump (34), the output of micro-gap switch (32) and the input electric connection of water pump (34), the delivery outlet of water pump (34) passes through elastic hose (35) and links to each other with searchlight (5) are fixed.

10. The angle-adjustable searchlight device for the unmanned helicopter of claim 9, characterized in that: the searchlight (5) comprises a lamp body (501) and a heat dissipation shell (502), wherein the heat dissipation shell (502) is covered on the outer wall of the lamp body (501), the inner wall of the heat dissipation shell (502) is uniformly provided with a plurality of heat dissipation grooves (503), and the heat dissipation grooves (503) are communicated with one another through a communication pipe (504);

the tail end of the elastic hose (35) extends to the interior of the heat dissipation shell (502) and is communicated with the heat dissipation groove (503).

Background

The unmanned helicopter has unique flight performance and use value. Compared with the manned helicopter, the unmanned helicopter has the characteristics of no casualties, small volume, low manufacturing cost, strong battlefield viability and the like, and has incomparable superiority in many aspects; compared with a fixed wing unmanned aerial vehicle, the unmanned helicopter can take off and land vertically and hover in the air, flies in any direction, has a small take-off and landing field, and does not need to be provided with a complicated and large-volume launching and recovering system like the fixed wing unmanned aerial vehicle.

Due to the development of the unmanned helicopter technology, the application range of the unmanned helicopter is wider and wider, the unmanned helicopter plays an indispensable importance in both the civil field and the military field, especially the application in the aspect of aerial photography is wider and wider, and the adoption of the unmanned helicopter as an aerial photography platform becomes a mainstream of the current development. However, the existing unmanned helicopter has a weak lighting function, cannot achieve a certain effect in lighting at night or under the condition of poor light, and has a fuzzy shot picture, which brings great trouble to aerial photography;

the Chinese patent publication number is: the invention discloses a searchlight for an unmanned aerial vehicle, which comprises a lamp holder, a rotary steering engine and a lamp barrel, wherein the lamp holder is mounted on the unmanned aerial vehicle, the rotary steering engine is arranged on the outer side of the lamp holder, the rotary steering engine drives the lamp barrel to rotate, the lamp barrel is arranged on the inner side of the lamp holder, a zoom steering engine, a lamp bead and a convex mirror are arranged in the lamp barrel, the zoom steering engine drives the lamp bead to zoom, and the convex mirror is fixed in front of the lamp bead. The searchlight has the advantages of simple structure, convenience in manufacturing and powerful function, is mounted on the unmanned aerial vehicle in a mounting mode, is firm in mounting and convenient to mount and dismount, the lamp barrel is pushed to rotate by the rotary steering engine, the irradiation range of the lamp barrel is increased, the lamp bead seat is pushed by the zoom steering engine through the connecting rod to realize safe zooming of the lamp bead, so that articles can be irradiated more clearly, and the problem of illumination on the unmanned aerial vehicle is effectively solved.

In the above patent, although the searchlight can be rotated to increase the irradiation range, and the safe zooming of the lamp bead can also be realized by pushing the lamp bead seat, in practical application, we find that there still exist certain disadvantages, such as:

1. the searchlight is inconvenient to adjust the up-down irradiation angle of the lamp holder, has a small irradiation range and poor practicability, and brings certain obstruction to aerial photography of the unmanned helicopter;

2. when the unmanned helicopter sails at a high speed or external wind power is large, the searchlight can be subjected to large wind resistance, and under the action of the wind resistance, a mechanical structure for adjusting the angle of the searchlight can be abraded, so that the reliability and the accuracy of angle adjustment are seriously influenced;

3. the searchlight has poor heat dissipation effect, the interior of the searchlight can generate more heat after the searchlight works for a long time, and the service life of the searchlight can be influenced by the untimely heat dissipation;

based on this, we provide an angle-adjustable searchlight device for an unmanned helicopter, and hope to solve the defects in the prior art.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides the angle-adjustable searchlight device for the unmanned helicopter, which has the advantages of convenience in adjusting the irradiation angle of the searchlight, capability of preventing an adjusting mechanism from being abraded when the wind resistance is large, and good heat dissipation effect.

(II) technical scheme

In order to achieve the purpose of conveniently adjusting the irradiation angle of the searchlight, the invention provides the following technical scheme: the angle-adjustable searchlight device for the unmanned helicopter comprises a helicopter body, wherein a driving box is fixedly installed at the bottom of the helicopter body, a connecting cylinder is fixedly installed at the bottom of the driving box, a transmission box is fixedly installed at the bottom of the connecting cylinder, and a searchlight is movably arranged below the transmission box;

the outer wall fixed mounting of drive box has electric putter, connects the drive arrangement between electric putter and searchlight, drives the searchlight and rotates round the transmission box.

As a preferred technical scheme of the invention, the driving device comprises a movable rod, a drawing cylinder, a rack, a gear, a rotating shaft and a connecting rod, wherein the movable rod is fixedly installed at the top of an output shaft of the electric push rod, the drawing cylinder is inserted into the bottom of the movable rod, the rack is fixedly installed at the bottom of the drawing cylinder, the gear is meshed with the bottom of the rack, the rotating shaft is fixedly installed at the center of the gear, and two ends of the rotating shaft are rotatably arranged on the inner wall of the transmission box;

the outer walls at the two ends of the rotating shaft are fixedly provided with connecting rods, and the tail ends of the two connecting rods extend to the outside of the transmission box and are fixedly connected with the searchlight.

As a preferred technical scheme of the invention, a guide rod is inserted in the rack, two ends of the guide rod are fixedly arranged on the inner wall of a positioning ring, the positioning ring is arranged on the inner wall of an annular cabinet, and the annular cabinet is fixedly arranged on the inner wall of a connecting cylinder.

As a preferable technical scheme of the invention, the outer wall of the transmission box is provided with a movable groove, the tail ends of the two connecting rods penetrate through the movable groove and are fixedly connected with the searchlight, and the left side of the inner wall of the movable groove is also fixedly provided with an elastic rubber pad.

On the basis of the technical scheme, in order to achieve the purpose of preventing the adjusting mechanism from being abraded when the wind resistance is large, the invention also provides the following technical scheme: the holding ring slides and sets up on the inner wall of annular cabinet, fixedly connected with second spring between the top of holding ring and the interior roof of annular cabinet, the bottom of holding ring is provided with annular gasbag, annular gasbag's outer wall is provided with main trachea, main trachea's end extends to the outside of transmission box.

As a preferred technical scheme of the invention, an air duct is fixedly mounted on the outer wall of the connecting cylinder, a fan housing is fixedly mounted at the tail end of the air duct, a filter screen is fixedly mounted on the inner wall of the fan housing, a piston is movably arranged on the inner wall of the air duct, and a first spring is fixedly connected between the outer wall of the piston and the inner wall of the connecting cylinder;

the tail end of the main air pipe is communicated with the air duct.

On the basis of the technical scheme, in order to achieve the purpose of good heat dissipation effect, the invention further provides the following technical scheme: a branch air pipe is fixedly installed at the bottom of the air duct, a second control valve is arranged inside the branch air pipe, a first control valve is arranged inside the main air pipe, a distance sensor is fixedly installed on the outer wall of the connecting tube, and the installation position of the distance sensor corresponds to the position of the piston;

the output end of the distance sensor is electrically connected with a controller, and the output end of the controller is electrically connected with the input ends of the first control valve and the second control valve respectively.

As a preferred technical scheme of the invention, the bottom of the air duct is also fixedly provided with a bottom barrel, the bronchus is arranged in the bottom barrel, the inner wall of the bottom barrel is movably provided with a pressure plate, and a third spring is fixedly connected between the bottom of the pressure plate and the inner bottom wall of the bottom barrel;

and the inner bottom wall of the bottom barrel is also fixedly provided with a microswitch.

As a preferred technical scheme of the present invention, a water tank is fixedly installed at the bottom of the connecting cylinder, a cooling liquid is stored in the water tank, a water pump is fixedly installed on an inner bottom wall of the water tank, an output end of the micro switch is electrically connected with an input end of the water pump, and an output end of the water pump is fixedly connected with the searchlight through an elastic hose.

As a preferred technical scheme of the invention, the searchlight comprises a lamp body and a heat dissipation shell, wherein the heat dissipation shell is covered on the outer wall of the lamp body, the inner wall of the heat dissipation shell is uniformly provided with a plurality of heat dissipation grooves, and the heat dissipation grooves are communicated with one another through a communication pipe;

the tail end of the elastic hose extends into the radiating shell and is communicated with the radiating groove.

(III) advantageous effects

Compared with the prior art, the angle-adjustable searchlighting device for the unmanned helicopter provided by the invention has the following beneficial effects:

1. this angle adjustable searchlight device for unmanned helicopter, the removal pole that electric putter moved its output shaft top is controlled in the operation, remove about the removal pole and control through taking out a section of thick bamboo drive rack, the rack is removed and is moved the gear rotation that drives its outer wall meshing, the gear rotation drives the axis of rotation, the axis of rotation drives the connecting rod swing, the connecting rod swing just can drive the searchlight swing, the angle of shining of adjustment searchlight, the structure is simpler, the adjustment is got up convenience more, the practicality is better.

2. This unmanned helicopter is with angle adjustable searchlighting device, when unmanned helicopter is at high-speed navigation or external wind-force is great, piston windforce effect inwards moves in the dryer, the air that can make in the dryer when the piston inwards moves the compression first spring can make through main air tube inflation annular gasbag, annular gasbag is inflated and is bloated and promotes the holding ring rebound, the holding ring rebound drives rack rebound through the guide bar, make the rack break away from the gear, at this moment, the searchlight, connecting rod and gear rotate left to maximum amplitude and paste on the elastic rubber pad, can not produce the collision, and the rack also with gear phase separation, can not produce wearing and tearing under the effect of windage, life is longer, it is also higher to adjust the precision.

3. This unmanned helicopter is with angle adjustable searchlighting device, distance sensor can monitor the distance of piston inward movement, under the normal condition, the second control valve is opened, first control valve is closed, the air can fill the end section of thick bamboo through the bronchus when the piston inward movement, when unmanned helicopter is at high speed navigation or when external wind-force is great, the piston receives the wind power to act on and moves inwards darker in the dryer, when the piston inward movement is darker (the piston crosses the bronchus) distance sensor can control the second control valve through the controller and close, first control valve is opened, the air can fill annular gasbag through the bronchus this moment, make rack and gear phase separation, prevent that it from producing wearing and tearing under the effect of windage.

4. This unmanned helicopter is with angle-adjustable searchlighting device, when the air fills the end section of thick bamboo through the bronchus, can push down the board under the effect of atmospheric pressure, can trigger micro-gap switch when clamp plate rebound compression third spring, micro-gap switch is by the operation of trigger control water pump, coolant liquid in the water pump operation extraction water tank and through elastic hose to coolant liquid transport to the radiating groove, coolant liquid flows in a plurality of radiating groove through communicating pipe, wind also walks to flow in the radiating groove simultaneously, utilize the flow of wind and the evaporation of coolant liquid, can effectually dispel the heat to the lamp body, prevent that the lamp body temperature is too high.

Drawings

FIG. 1 is a perspective view of the overall structure of the present invention;

FIG. 2 is a perspective view of a portion of the connector barrel of the present invention;

FIG. 3 is an elevational, cross-sectional view of a connector barrel portion of the present invention;

FIG. 4 is an enlarged view taken at A of FIG. 3 in accordance with the present invention;

FIG. 5 is a perspective view of the rack and pinion drive of the present invention;

FIG. 6 is a perspective view of the annular bladder portion of the present invention;

FIG. 7 is a sectional view of a portion of an air duct of the present invention;

FIG. 8 is a side cross-sectional view of a portion of the searchlight of the present invention.

In the figure: 1. a body; 2. a drive cartridge; 3. a connecting cylinder; 4. a transmission box; 5. a searchlight; 501. a lamp body; 502. a heat dissipation housing; 503. a heat sink; 504. a communicating pipe; 6. an electric push rod; 7. a travel bar; 8. drawing the tube; 9. a rack; 10. a positioning ring; 11. an annular cabinet; 12. a gear; 13. a rotating shaft; 14. a connecting rod; 15. a movable groove; 16. an elastic rubber pad; 17. a fan housing; 18. an air duct; 19. a filter screen; 20. a piston; 21. a first spring; 22. a main air pipe; 23. an annular air bag; 24. a second spring; 25. a first control valve; 26. a bottom cylinder; 27. a bronchus; 28. a second control valve; 29. a distance sensor; 30. pressing a plate; 31. a third spring; 32. a microswitch; 33. a water tank; 34. a water pump; 35. an elastic hose; 36. a guide rod.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The first embodiment is as follows:

referring to fig. 1, 2, 3 and 5, an angle-adjustable searchlight device for an unmanned helicopter comprises a machine body 1, wherein a driving box 2 is fixedly installed at the bottom of the machine body 1, a connecting cylinder 3 is fixedly installed at the bottom of the driving box 2, a transmission box 4 is fixedly installed at the bottom of the connecting cylinder 3, and a searchlight 5 is movably arranged below the transmission box 4;

the outer wall of the driving box 2 is fixedly provided with an electric push rod 6, a driving device connected between the electric push rod 6 and the searchlight 5 drives the searchlight 5 to rotate around the transmission box 4, the driving device comprises a moving rod 7, a drawing tube 8, a rack 9, a gear 12, a rotating shaft 13 and a connecting rod 14, the top of an output shaft of the electric push rod 6 is fixedly provided with the moving rod 7, the bottom of the moving rod 7 is spliced with the drawing tube 8, the bottom of the drawing tube 8 is fixedly provided with the rack 9, the bottom of the rack 9 is meshed with the gear 12, the center of the gear 12 is fixedly provided with the rotating shaft 13, two ends of the rotating shaft 13 are rotatably arranged on the inner wall of the transmission box 4, the outer walls at two ends of the rotating shaft 13 are fixedly provided with the connecting rods 14, the tail ends of the two connecting rods 14 extend to the outside of the transmission box 4 and are fixedly connected with the searchlight 5, the electric push rod 6 operates to drive the moving rod 7 at the top of the output shaft to move left and right, the moving rod 7 moves left and right to drive the rack 9 to move left and right through the drawing cylinder 8, the rack 9 moves left and right to drive the gear 12 meshed with the outer wall of the rack to rotate, the gear 12 rotates to drive the rotating shaft 13 to rotate, the rotating shaft 13 rotates to drive the connecting rod 14 to swing, the connecting rod 14 can swing to drive the searchlight 5 to swing, the irradiation angle of the searchlight 5 is adjusted, the structure is simpler, the adjustment is more convenient, and the practicability is better;

a guide rod 36 is inserted into the rack 9, two ends of the guide rod 36 are fixedly arranged on the inner wall of the positioning ring 10, the rack 9 can be more stably moved left and right due to the insertion of the guide rod 36 in the rack 9, the positioning ring 10 is arranged on the inner wall of the annular cabinet 11, and the annular cabinet 11 is fixedly arranged on the inner wall of the connecting cylinder 3;

the movable groove 15 has been seted up to the outer wall of transmission box 4, and the end of two connecting rods 14 passes movable groove 15 and links to each other with searchlight 5 is fixed, and two connecting rods 14 can be at the removal of the round trip in movable groove 15, and the left side of movable groove 15 inner wall still fixed mounting has elastic rubber mat 16, and elastic rubber mat 16 plays the effect of buffering, prevents that connecting rod 14 from striking movable groove 15's inner wall and damaging.

Example two:

referring to fig. 2, 3, 4, 6 and 7, based on the first embodiment, the positioning ring 10 is slidably disposed on the inner wall of the annular cabinet 11, a second spring 24 is fixedly connected between the top of the positioning ring 10 and the inner top wall of the annular cabinet 11, an annular air bag 23 is disposed at the bottom of the positioning ring 10, a main air pipe 22 is disposed on the outer wall of the annular air bag 23, and the end of the main air pipe 22 extends to the outside of the transmission box 4;

an air duct 18 is fixedly installed on the outer wall of the connecting cylinder 3, a fan cover 17 is fixedly installed at the tail end of the air duct 18, a filter screen 19 is fixedly installed on the inner wall of the fan cover 17, the filter screen 19 can filter dust in air and prevent the dust from entering the fan cover 17 and the air duct 18, a piston 20 is movably arranged on the inner wall of the air duct 18, a first spring 21 is fixedly connected between the outer wall of the piston 20 and the inner wall of the connecting cylinder 3, and the tail end of a main air pipe 22 is communicated with the air duct 18;

when the unmanned helicopter sails at high speed or has high external wind power, the piston 20 moves inwards under the action of wind power in the air duct 18, the piston 20 moves inwards to compress the first spring 21, air in the air duct 18 is filled into the annular air bag 23 through the main air pipe 22, the annular air bag 23 is inflated to push the positioning ring 10 to move upwards, the positioning ring 10 moves upwards to drive the rack 9 to move upwards through the guide rod 36, and the rack 9 is separated from the gear 12, at the moment, the searchlight 5, the connecting rod 14 and the gear 12 rotate leftwards to the maximum amplitude under the action of the wind and are attached to the elastic rubber pad 16, collision cannot occur, the rack 9 is also separated from the gear 12, abrasion cannot occur under the action of wind resistance, the service life is longer, and the adjustment precision is higher;

the movable rod 7 is inserted into the pumping cylinder 8, and even if the vertical position of the rack 9 is changed, the movable rod 7 can still drive the rack 9 to move left and right through the pumping cylinder 8.

Example three:

referring to fig. 3, 4 and 8, on the basis of the first and second embodiments, a branch air pipe 27 is fixedly installed at the bottom of the air duct 18, a second control valve 28 is installed inside the branch air pipe 27, a first control valve 25 is installed inside the main air pipe 22, a distance sensor 29 is fixedly installed on the outer wall of the connecting duct 3, and the installation position of the distance sensor 29 corresponds to the position of the piston 20;

the output end of the distance sensor 29 is electrically connected with a controller, the output end of the controller is respectively electrically connected with the input ends of the first control valve 25 and the second control valve 28, the distance sensor 29 can monitor the inward moving distance of the piston 20, and under the normal state, the second control valve 28 is opened and the first control valve 25 is closed, and air is filled in the bottom cylinder 26 through the branch pipe 27 when the piston 20 moves inward, when the unmanned helicopter sails at a high speed or the external wind power is large, the piston 20 moves deeper inwards under the action of the wind force in the wind cylinder 18, when the piston 20 moves deeper inwards (the piston 20 passes through the branch air pipe 27), the distance sensor 29 controls the second control valve 28 to be closed through the controller, the first control valve 25 is opened, and at the moment, air is filled into the annular air bag 23 through the branch air pipe 27, so that the rack 9 is separated from the gear 12, and the rack is prevented from being abraded under the action of wind resistance;

the bottom of the air duct 18 is also fixedly provided with a bottom tube 26, the branch air duct 27 is arranged inside the bottom tube 26, the inner wall of the bottom tube 26 is movably provided with a pressure plate 30, a third spring 31 is fixedly connected between the bottom of the pressure plate 30 and the inner bottom wall of the bottom tube 26, and the inner bottom wall of the bottom tube 26 is also fixedly provided with a microswitch 32;

the bottom of the connecting cylinder 3 is fixedly provided with a water tank 33, cooling liquid is stored in the water tank 33, a water pump 34 is fixedly arranged on the inner bottom wall of the water tank 33, the output end of the microswitch 32 is electrically connected with the input end of the water pump 34, the output port of the water pump 34 is fixedly connected with the searchlight 5 through an elastic hose 35, when air is filled into the bottom cylinder 26 through the branch air pipe 27, the pressing plate 30 can be pressed down under the action of air pressure, the pressing plate 30 moves downwards to compress the third spring 31 and simultaneously trigger the microswitch 32, the microswitch 32 is triggered to control the operation of the water pump 34, the water pump 34 pumps the cooling liquid in the water tank 33, and conveys the cooling liquid to the searchlight 5 through the elastic hose 35 to dissipate heat of the searchlight 5;

the searchlight 5 comprises a lamp body 501 and a heat dissipation shell 502, the heat dissipation shell 502 is covered on the outer wall of the lamp body 501, a plurality of heat dissipation grooves 503 are uniformly formed in the inner wall of the heat dissipation shell 502, the heat dissipation grooves 503 are communicated with each other through a communication pipe 504, the tail end of the elastic hose 35 extends into the heat dissipation shell 502 and is communicated with the heat dissipation grooves 503, cooling liquid in the elastic hose 35 flows into the heat dissipation grooves 503 and flows in the heat dissipation grooves 503 through the communication pipe 504, meanwhile, external wind also flows in the heat dissipation grooves 503 in a penetrating mode, the flowing of the wind and the evaporation of the cooling liquid are utilized, the heat dissipation of the lamp body 501 can be effectively achieved, and the over-high temperature of the lamp body 501 is prevented.

The working principle and the using process of the invention are as follows:

the electric push rod 6 operates to drive the moving rod 7 at the top of the output shaft to move left and right, the moving rod 7 moves left and right to drive the rack 9 to move left and right through the drawing cylinder 8, the rack 9 moves left and right to drive the gear 12 meshed with the outer wall of the rack to rotate, the gear 12 rotates to drive the rotating shaft 13 to rotate, the rotating shaft 13 rotates to drive the connecting rod 14 to swing, the connecting rod 14 can drive the searchlight 5 to swing to adjust the irradiation angle of the searchlight 5, the structure is simpler, the adjustment is more convenient, and the practicability is better;

when the unmanned helicopter sails at high speed or has high external wind power, the piston 20 moves inwards under the action of wind power in the air duct 18, the piston 20 moves inwards to compress the first spring 21, air in the air duct 18 is filled into the annular air bag 23 through the main air pipe 22, the annular air bag 23 is inflated to push the positioning ring 10 to move upwards, the positioning ring 10 moves upwards to drive the rack 9 to move upwards through the guide rod 36, and the rack 9 is separated from the gear 12, at the moment, the searchlight 5, the connecting rod 14 and the gear 12 rotate leftwards to the maximum amplitude under the action of the wind and are attached to the elastic rubber pad 16, collision cannot occur, the rack 9 is also separated from the gear 12, abrasion cannot occur under the action of wind resistance, the service life is longer, and the adjustment precision is higher;

the distance sensor 29 can monitor the inward movement distance of the piston 20, in a normal state, the second control valve 28 is opened, the first control valve 25 is closed, air can be filled into the bottom barrel 26 through the branch air pipe 27 when the piston 20 moves inward, when the unmanned helicopter sails at high speed or external wind power is large, the piston 20 moves deeper inward in the wind barrel 18 under the action of wind power, when the piston 20 moves deeper inward (the piston 20 passes through the branch air pipe 27), the distance sensor 29 can control the second control valve 28 to be closed through the controller, the first control valve 25 is opened, and at the moment, air can be filled into the annular air bag 23 through the branch air pipe 27, so that the rack 9 is separated from the gear 12, and the abrasion of the rack 9 under the action of wind resistance is prevented;

when air is filled into the bottom barrel 26 through the branch air pipe 27, the pressing plate 30 can be pushed downwards under the action of air pressure, the pressing plate 30 moves downwards to compress the third spring 31 and simultaneously trigger the micro switch 32, the micro switch 32 is triggered to control the water pump 34 to operate, the water pump 34 operates to pump cooling liquid in the water tank 33 and convey the cooling liquid to the radiating grooves 503 through the elastic hose 35, the cooling liquid flows in the radiating grooves 503 through the communicating pipes 504, meanwhile, air also flows in the radiating grooves 503 in a penetrating mode, and by means of the flowing of the air and the evaporation of the cooling liquid, the heat of the lamp body 501 can be effectively dissipated, and the temperature of the lamp body 501 is prevented from being overhigh.

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.