34results about How to "Take off smoothly" patented technology

The invention discloses a mounting platform of an unmanned airplane. The mounting platform comprises a gravity center adjustment assembly and a hanging assembly for hanging articles. The gravity center adjustment assembly is connected with a fuselage. The hanging assembly is hung onto the gravity center adjustment assembly. The gravity center adjustment assembly is provided with a plurality of first hanging parts for adjusting the horizontal position of the hanging assembly. The mounting platform is simple in structure and can be applied to the unmanned airplane, wherein the gravity center thereof can be quickly adjusted. Therefore, different articles can be hung onto the hanging assembly. Meanwhile, the mounting platform is good in damping and shock-filtering effect and is particularly suitable for the hanging of heavy articles.

The invention discloses a process for manufacturing a Wolter-I reflector by means of copying. The process includes the following steps that: a precision mandrel used for copying is manufactured; a DLCfilm is applied by means of the PVD (Physical Vapor Deposition) process; a gold film reflective layer is applied by means of the PVD process; a reflector shell is obtained through electroforming; thesurface of the reflector shell is trimmed; a reflector is released from the mandrel in a low-temperature refrigeration room by using a mold release device; and the surface of the reflector is washed.According to the process of the invention, DLC is applied between the copying gold film and the surface of the mandrel so as to be adopted as a release layer, and therefore, the gold film can be effectively prevented being damaged, and the smooth release of the gold film from the mandrel can be facilitated; the gold film is plated at the rotation surface and two end surfaces of the mandrel simultaneously, and therefore, electroforming nickel can be prevented from infiltrating between the gold film at the end surfaces of the mandrel and the surface of the mandrel during an electroforming process; electroforming time can be prolonged, the strength of the reflector shell is increased, the deformation of the reflector shell is prevented, and the reflector shell is easy to shell, transport andinstall; and the mandrel is made to be separated from the reflector shell through an auxiliary shelling device in the low-temperature room, and therefore, the manufacturing cost increase of the reflector and health hazards can be avoided.

The invention discloses a multi-adaptive electromagnetic force adsorption unmanned aerial vehicle recovery system which comprises a recovery platform, a guide system, an infrared recognition system, an adsorption system and a control system. The recovery platform comprises a slide rail system, and a position-adjustable support fixing table is assembled on the slide rail system; the guide system isarranged in the middle of a platform bottom plate, and the unmanned aerial vehicle obtains an image of the guide system through a visual sensor and lands; the adsorption system comprises an electromagnet arranged on each support fixing table, and a metal area matched with the electromagnet is arranged on a undercarriage of the unmanned aerial vehicle; and the infrared recognition system is used for opening the electromagnet for fixing when detecting that the unmanned aerial vehicle lands. The system is simple in structure, convenient to maintain, high in reliability, not prone to being affected by field sundries, convenient to use, high in universality and so on.

The invention relates to a vertical automatic loading and unloading system device and method. The vertical automatic loading and unloading system device comprises cargo carrying equipment, a cargo case, a conveying rail and a lift. The lift rises and falls in the vertical direction to move the cargo case so as to complete the process of loading the cargo case to the cargo carrying equipment or unloading the cargo case from the cargo carrying equipment to the conveying rail. According to the vertical automatic loading and unloading method, loading and unloading are conducted through the vertical automatic loading and unloading system device. The vertical automatic loading and unloading system device is high in automation degree; the cargo case and the cargo carrying equipment are locked through a locking mechanism so that cargos can be hung on the cargo carrying equipment safely and precisely, steadiness is achieved, and unloading is easy and convenient; and the vertical automatic loading and unloading system device is suitable for automatic cargo carrying tools such as an unmanned aerial vehicle, an unmanned vehicle and a sorting device and especially suitable for loading and unloading operation of the unmanned aerial vehicle.

The invention discloses a stamping die of an automobile back door lock reinforcing plate, relating to the technical field of manufacturing of stamping dies. The stamping die comprises an upper die seat and a lower die seat, wherein the lower end of the upper die seat is sequentially provided with an upper clamping plate, an upper template and a molding convex die; edge overturning stamping heads are arranged on the two sides of the molding convex die and penetrate through the upper template and the upper clamping plate to be connected with the upper die seat; the upper clamping plate is provided with a plurality of loading and unloading springs; a plurality of loading and unloading bolts connected with the upper template are hung on the upper die seat; a lower base plate and a molding concave die are sequentially arranged at the upper end of the lower die seat; lower templates are arranged on the two sides of the molding concave die; edge overturning grooves corresponding to the edge overturning stamping heads are formed between the lower template and the molding concave die; a plurality of loading and unloading springs are arranged on the lower base plate; the lower die seat is provided with a plurality of loading and unloading bolts connected with the molding concave die. Compared with the prior art, edge overturning can be carried out when a workpiece is stamped and molded and all machining procedures of the automobile back door lock reinforcing plate are finished; the workpiece does not need to be repositioned and is accurate in positioning, and the product quality is stable.

The invention belongs to the technical field of aircrafts and discloses a four-rotor aircraft based on an AVR single chip microcomputer. The four-rotor aircraft based on the AVR single chip microcomputer comprises a main control module, a remote-control communication module, an inertia measurement module, a power supply module and a driving module. The four-rotor aircraft has the advantages of being simple in mechanical structure, low in cost, low in accident rate, light in weight and the like, the four-rotor aircraft with the functions of self-stabilizing, hovering, returning and the like ofthe aircraft can be realized, meanwhile, the four-rotor aircraft is controlled through cooperation with a double-closed-loop cascade PID control algorithm, and finally online debugging is carried outthrough an upper computer software, an outdoor on-site flight test proves that the four-rotor wings can stably take off well, actions such as self-stabilization and hovering can be completed, such that the purpose of the design is achieved.

The invention relates to the field of unmanned aerial vehicle auxiliary equipment, particularly to an auxiliary take-off device of an unmanned aerial vehicle. The device comprises a base; a boosting mechanism with an adjustable inclination angle is arranged on the base, a clamping mechanism used for clamping and fixing an unmanned aerial vehicle is arranged on the boosting mechanism, a pneumatic thrust mechanism used for accelerating the unmanned aerial vehicle is further arranged on the boosting mechanism, and a triggering mechanism used for releasing the pressure of the pneumatic thrust mechanism and unlocking the clamping mechanism at the same time is arranged on the boosting mechanism. According to the auxiliary take-off device of an unmanned aerial vehicle, the boosting mechanism andthe pneumatic thrust mechanism play an auxiliary role in takeoff of the unmanned aerial vehicle, so that the take-off speed of the unmanned aerial vehicle is effectively improved and the working efficiency of the unmanned aerial vehicle is improved; a special runway does not need to be built, the use cost is reduced, a problem that the unmanned aerial vehicle is large in load during takeoff can besolved; the unmanned aerial vehicle is clamped and fixed through the clamping mechanism, the unmanned aerial vehicle keeps stable on the sliding rail, and then the high stability and reliability of the whole device in the unmanned aerial vehicle auxiliary takeoff process are guaranteed.

The invention provides a flying net egg which comprises a protective net device, obstacle evading sensors, an aircraft, an accumulator device and a damping base device, wherein the protective net device is arranged on the upper part of the aircraft; the obstacle evading sensors are respectively arranged on the left, right, front and rear sides of the aircraft; the accumulator device is inlaid at amiddle position on the upper part of the inner side of the aircraft; the damping base device is in bolted connection with the lower part of the aircraft; the protective net device comprises a solar cell panel, an outer protective net and an inner protective net; the solar cell panel is spliced onto the web surface of the outer protective net and the inner protective net; and the outer protectivenet is spliced onto the inner protective net. The flying net egg disclosed by the invention has the beneficial effects that due to an egg-shaped arrangement of the protective net device, the aircraftis prevented from being hung on tree branches and shuttling back and forth in the crowd while dropping; and due to the arc arrangement on the lower part of the protective net device, the aircraft stably takes off and lands in different environments.

The invention belongs to the technical field of information processing and control, and discloses an autonomous landing and charging method and system of a full-automatic micro quadrotor. The autonomous landing and charging method of the full-automatic micro quadrotor comprises the following steps: electric quantity pre-warning of the micro quadrotor is carried out, and the micro quadrotor is made to fly to the position above a ground relay station through GPS positioning; a camera shoots the micro quadrotor for background subtraction, positioned catching and tracking of the micro quadrotor; and the micro quadrotor is combined with differential GPS information returned from the ground, the height of the micro quadrotor is read for 3D positioning, and autonomous landing of the micro quadrotor is guided. The method can automatically control taking-off and landing of the micro quadrotor to save the labor force; meanwhile, an opening / closing device and a frame can guarantee no damage of the micro quadrotor in special weathers; taking-off and landing of most traditional inland unmanned aerial vehicles are finished on the ground; and no fixed lifting opening / closing structures can guarantee preservation and stable taking-off of the unmanned aerial vehicles.

The invention relates to a maize picker principle and a device arranged on a cropper, and is an agricultural machine. Compared with the current stripping by means of squeezing and rubbing forcibly with a principle of roll rotating and rubbing, the invention is characterized in that when the tip part of a maize plant turns towards a stripper intercept rod and operates reversely from the rod, the corn ear can be toggled from the tip downwardly and steered by the stripper intercept rod, leading the ear to be separated from the plant in the natural direction. The invention has the advantages that the ear can not be impacted and any position of the ear can not be rubbed to cause an injury in the picking process; the picking efficiency can be greatly improved; the energy consumption is lowered in a large scale.

The invention relates to a drone, in particular to a highly stable starting drone. The highly stable starting drone is characterized in that the vehicle is good in take-off stability, stable in placement and good in protection effect. The highly stable starting drone comprises a circular baseplate and the like; multiple supporting legs are evenly arranged on the bottom of the circular baseplate, multiple dial indicators are arranged on the top of the circular baseplate, first rubber pads are arranged at the tops of the dial indicators, a drone body is arranged on the tops of the first rubber pads, and an adjustment device is arranged on the bottom of the drone body. According to the highly stable starting drone, the gravity center is kept stable through the adjustment device, the drone body is kept in a balanced state through a balancing device when the ground is not flat, meanwhile the drone body runs more stably through a stabilizing device, and then the drone body is protected through shielding cloth and a cover plate.

A wrench comprising: a wrench part for loosening or tightening an object body; a pair of wedge-shaped sliding pieces, which are symmetrically combined inside the wrench part, and between the wrench part and the object body Can move to the outside and slide back and forth between them; the coil spring, which is interposed between the inner bottom surface of the wrench head and the side of the sliding piece opposite to the inner bottom surface, elastically biases the sliding piece The sliding piece is elastically supported against the opening direction of the wrench portion. Since the wrench with this structure has a slidable sliding piece, even in a narrow space, it is not necessary to pull out the wrench head of the wrench, so that the work can be carried out continuously and smoothly, and the structure is improved.

The invention relates to the field of unmanned aerial vehicles, and particularly provides an intelligent scheduling system and device based on an unmanned aerial vehicle hangar. The system comprises a hangar, the hangar comprises a hangar shell, a parking opening is formed in the top of the hangar shell, a parking scheduling device and a plurality of parking platforms are arranged in the hangar shell, and the parking scheduling device is used for driving the plurality of parking platforms to move. All the parking platforms intermittently stop at the parking ports to pick up aircrafts. The multiple parking platforms are driven by the parking scheduling device to move, the parking platforms are intermittently stopped at the parking ports for airport pickup, and the unmanned aerial vehicles flying from the outside are stopped on the parking platforms at the parking ports. The unmanned aerial vehicle is conveyed into the hangar shell, workers in the hangar shell can maintain and charge the unmanned aerial vehicle, meanwhile, the next parking platform is moved to the parking opening, and it is guaranteed that the parking opening is in an idle state all the time. In this way, the parking space can be saved to the maximum extent, and it can be guaranteed that the unmanned aerial vehicle always has a parking position.

The invention discloses a process for manufacturing a Wolter-I reflector by means of copying. The process includes the following steps that: a precision mandrel used for copying is manufactured; a DLCfilm is applied by means of the PVD (Physical Vapor Deposition) process; a gold film reflective layer is applied by means of the PVD process; a reflector shell is obtained through electroforming; thesurface of the reflector shell is trimmed; a reflector is released from the mandrel in a low-temperature refrigeration room by using a mold release device; and the surface of the reflector is washed.According to the process of the invention, DLC is applied between the copying gold film and the surface of the mandrel so as to be adopted as a release layer, and therefore, the gold film can be effectively prevented being damaged, and the smooth release of the gold film from the mandrel can be facilitated; the gold film is plated at the rotation surface and two end surfaces of the mandrel simultaneously, and therefore, electroforming nickel can be prevented from infiltrating between the gold film at the end surfaces of the mandrel and the surface of the mandrel during an electroforming process; electroforming time can be prolonged, the strength of the reflector shell is increased, the deformation of the reflector shell is prevented, and the reflector shell is easy to shell, transport andinstall; and the mandrel is made to be separated from the reflector shell through an auxiliary shelling device in the low-temperature room, and therefore, the manufacturing cost increase of the reflector and health hazards can be avoided.

The invention relates to the field of anti-counterfeiting labels, and discloses a multi-layer tamper-proof disposable digital anti-counterfeiting label, which sequentially comprises an anti-counterfeiting label surface layer, an isolation layer, a solid glue layer, a vacuum aluminum plating layer, an adhesive layer and a silicone oil bottom paper from inside to outside, the viscosity of between the isolation layer and the solid glue layer is less than that between the solid glue layer and the vacuum aluminum plating layer. When the anti-counterfeiting label is lifted, the anti-counterfeiting label surface layer and the isolation layer are completely removed and separated from the solid glue layer, so that the purpose of non-repeated use of the anti-counterfeiting label is realized. Meanwhile, the production method is simple, so that the method is suitable for large-scale popularization.

The invention discloses a hand-held water chestnut picker. The picker includes a holding rod, a grip, a handle, a connecting shell, a U-shaped shell, a sleeve shell, a lower stabilization disc, a griprod, a stem cutting device and a driving device. One end of the grip rod is fixedly connected with the connecting shell, the end, away from the holding rod, of the connecting shell is fixedly connected with the U-shaped shell, the U-shaped shell is internally provided with a sleeve shell, the two sides of the sleeve shell are communicated with the two ends of the U-shaped shell, the bottom of thesleeve shell is internally and rotatably connected with a rotating shaft through a bearing, one end of the bearing passes through the sleeve shell and is fixedly connected with the lower stabilization disc, the inner wall of the top of the sleeve shell is fixedly connected with a support rod, the side, near the rotating shaft, of the support rod is slidably connected with a rack, the outer side of the rotating shaft is sleeved with and fixedly provided with a gear column, and a gear is meshed and connected with a gear column. When the picker is used for picking water chestnuts, the picker isconvenient and fast to operate, the picking efficiency is increased, the picking range is increased, and some water chestnuts which are difficult to reach or pick manually can be conveniently picked.

The invention discloses a multi-flapping-rotor aircraft which comprises an aircraft body, supporting assemblies and flapping rotor assemblies, each flapping rotor assembly comprises four sets of flapping rotor devices, and the four sets of flapping rotor devices are symmetrically arranged on the two sides of the aircraft body in pairs through the supporting assemblies correspondingly; each flapping rotor wing device comprises a revolution main shaft, a rotating arm, an autorotation main shaft, a rotating wheel, a driving part, a rotor wing part, a pulling part, a brake part and a rotor wing frame, and the revolution main shaft, the rotating arm, the autorotation main shaft, the rotating wheel, the driving part, the rotor wing part, the pulling part, the brake part and the rotor wing frameare in linkage fit. Through the arrangement of the rotating wheel, the autorotation main shaft can also rotate in the revolution process, so that the rotor wing part is driven to rotate, and in the autorotation process, an upward lifting force is generated by utilizing the continuously rotating wing pieces, and the relatively large lifting force is provided for take-off and hovering of the aircraft.

The invention provides an automatic feeding device for buffer blocks. The automatic feeding device is suitable for stripping a plurality of buffer blocks arranged on a release paper material strip and realizing automatic feeding of the buffer blocks. The automatic feeding device comprises a rack, a buffer block feeding mechanism, a material strip recycling mechanism and a separation mechanism, wherein the buffer block feeding mechanism, the material strip recycling mechanism and the separation mechanism are respectively arranged on the rack; the release paper material strip extending from the buffer block feeding mechanism is recycled by the material strip recycling mechanism after passing through the separation mechanism; the separation mechanism comprises a separation block, and a material strip feeding guide surface and a material strip recycling guide surface are respectively arranged on the front side and the rear side; the front ends of the material strip feeding guide surface and the material strip recycling guide surface are intersecting to form an acute angle; the separation block can do reciprocating motion relatively to the rack along the arrangement direction of the material strip feeding guide surface. As the separation block can do reciprocating motion, in the process of separating from release paper, the buffer blocks can be subjected to the absorption of an external buffer block absorbing head and the stripping effect of acute angle end faces at the same time; the adhesive property of the buffer blocks and the release paper is overcome by depending on combination of the two effects, and therefore the buffer block with small size can also be separated from the release paper successfully.

The invention discloses a flying device which comprises a device body, a supporting assembly and a flapping rotor wing assembly, the flapping rotor wing assembly comprises two sets of flapping rotor wing devices, the two sets of flapping rotor wing devices are symmetrically arranged on the two sides of the drone body through the supporting assembly, and each set of flapping rotor wing device comprises a revolution main shaft, a rotating arm, a rotation main shaft, a rotating wheel, a driving part, a clutch and a rotor wing part. According to the ornithopter rotor wing device, through linkage cooperation of the revolution main shaft, the rotating arm, the autorotation main shaft, the rotating wheel, the driving part, the clutch and the rotor wing part, the revolution main shaft in the ornithopter rotor wing device drives the rotating arm and the autorotation main shaft to revolve, and the autorotation main shaft can also rotate in the revolution process through the arrangement of the rotating wheel; when one rotor part of the flapping rotor wing device rotates to a horizontal state, the clutch is closed, and the second driving motor is started to drive the other autorotation main shaft and the rotor wing part to autorotate until the other autorotation main shaft and the rotor wing part rotate to the horizontal state, so that the four rotor wing parts are all in the horizontal state, and larger lift force is provided for take-off and hovering of the aircraft.

One-piece shapewear belongs to the technical field of clothes and comprises a jacket and trousers, the front side of the one-piece shapewear is of an integrated one-piece structure, and the back sideof the one-piece shapewear is of an open split structure; a rear waist of trousers and a rear lower hem of a coat are arranged on a split part section; the rear waist of trousers and the rear lower hem can be in contact with each other and can also cover each other, and the rear hip circumference of the trousers is lengthened by 3-7%. The one-piece shapewear has the advantages that the body curvecan be highlighted and shaped, and defecation is facilitated; no zippers, row buttons or magic tapes and the like are arranged at the covering part of the rear underpants head and the rear lower hem,so that lateral proud flesh can be prevented from being pushed forwards and backwards, and skin recession is avoided; the rear underpants head structure occupying more than half of the waistline or the lower arc structure of the rear underpants head can be taken off more smoothly during defecation; the arc-shaped structure of the rear lower hem can hold the hip cup, lift the hip, highlight the figure curve and achieve the effects of beautifying and shaping the body; the rear hip circumference of the trousers is lengthened, so that hip cups can be enlarged, the overall fat of the buttocks is better improved, the buttock lifting effect is improved, and the rear hip circumference of the trousers can be matched with the rear waist of trousers to be more smoothly taken off during defecation.

The invention relates to the technical field of unmanned aerial vehicles, in particular to an unmanned aerial vehicle cluster cooperation control system which comprises a bearing plate, fixing rods are arranged on the left side and the right side of the top of the bearing plate correspondingly, stirring grooves are formed in the surfaces of the fixing rods, and a plurality of rotating rods which are evenly distributed at equal intervals are rotationally connected into the stirring grooves. The surface of the rotating rod is fixedly sleeved with a connecting pipe, the end, close to the outer side surface of the shifting groove, of the connecting pipe is fixedly connected with a balance plate, and the end, away from the balance plate, of the connecting pipe is fixedly connected with a shutdown plate. The unmanned aerial vehicle cluster cooperative control system solves the problems that an existing unmanned aerial vehicle cluster cooperative control system lacks a management and control device after centralized storage of unmanned aerial vehicles and returning of the unmanned aerial vehicles, and when the unmanned aerial vehicles are subjected to centralized storage of the management and control device, due to the fact that the unmanned aerial vehicles have many bodies, the storage device is large; and an operator cannot conveniently carry and use the device.

The invention relates to an automatic unmanned aerial vehicle continuous launching system and a control method, the automatic unmanned aerial vehicle continuous launching system comprises a catapult, an adjusting platform, lifting adjusting devices and a control system, the adjusting platform is supported by the three lifting adjusting devices, the lower ends of the lifting adjusting devices are installed on a ship body, the catapult is arranged on the adjusting platform, and an unmanned aerial vehicle is arranged on the catapult; the expansion and contraction amount of each lifting adjusting device is controlled through the control system, and the control system calculates the expansion and contraction amount of the lifting adjusting devices according to the movement of the ship body. The adjusting platform is used for compensating hull movement caused by sea waves, so that it is guaranteed that the unmanned aerial vehicle can take off smoothly without being affected by the sea waves, the unmanned aerial vehicle is particularly suitable for small ships prone to being affected by the sea waves, and the control system adjusts the lifting telescopic amount of all the lifting adjusting devices according to the LQR optimal control theory; the pose of the adjusting platform can be accurately and timely adjusted, and meanwhile, the whole process is automatically completed without other intervention.

The invention belongs to the technical field of information processing and control, and discloses a method and system for automatic landing and charging of a miniature quadrotor. The method for automatic landing and charging of a miniature quadrotor includes: early warning of electric power of a miniature quadrotor , use GPS to locate the micro quadrotor and fly directly above the ground relay station; the camera shoots the micro quadrotor, performs background difference, locates, captures, and tracks the micro quadrotor; combined with the differential GPS information sent back from the micro quadrotor and the ground, Read the height of the micro-quadrotor, perform 3D positioning, and guide the micro-quadrotor to land autonomously. The invention can automatically control the take-off and landing of the miniature quadrotor, which saves manpower. At the same time, the opening and closing device and the frame can ensure that the miniature quadrotor will not be damaged in special weather. The takeoff and landing of the existing domestic drones are mostly completed on the ground. , there is no fixed liftable opening and closing structure to ensure the preservation and smooth take-off of the drone.

A one-piece body-shaping underwear, which belongs to the technical field of clothing, includes a jacket and trousers, the front of which is an integral one-piece structure, and the back is an open split structure; Hem; the back top of the trousers and the back hem can touch each other or cover each other, and the hip circumference of the back trousers will be lengthened by 3-7%; its beneficial effect is that it can highlight and shape the body curve and facilitate toileting; the cover of the back top of the trousers and the back hem There are no zippers, buttons or Velcro at the joint, which can avoid pushing the side fat forward and backward, and avoid skin depression; the rear trousers structure or the lower arc structure of the rear trousers, which account for more than half of the waistline, can be used more smoothly when going to the toilet The curved structure of the rear hem can cover the hip cup, enhance the buttocks, highlight the body curve, and achieve the effect of body shaping; lengthening the hip circumference of the rear pants can enlarge the hip cup, so that the overall fat of the buttocks can be better improved and increased. The hip-lifting effect can also be used to take off the bottom of the pants more smoothly when going to the toilet.

The invention discloses a stamping die of an automobile back door lock reinforcing plate, relating to the technical field of manufacturing of stamping dies. The stamping die comprises an upper die seat and a lower die seat, wherein the lower end of the upper die seat is sequentially provided with an upper clamping plate, an upper template and a molding convex die; edge overturning stamping heads are arranged on the two sides of the molding convex die and penetrate through the upper template and the upper clamping plate to be connected with the upper die seat; the upper clamping plate is provided with a plurality of loading and unloading springs; a plurality of loading and unloading bolts connected with the upper template are hung on the upper die seat; a lower base plate and a molding concave die are sequentially arranged at the upper end of the lower die seat; lower templates are arranged on the two sides of the molding concave die; edge overturning grooves corresponding to the edge overturning stamping heads are formed between the lower template and the molding concave die; a plurality of loading and unloading springs are arranged on the lower base plate; the lower die seat is provided with a plurality of loading and unloading bolts connected with the molding concave die. Compared with the prior art, edge overturning can be carried out when a workpiece is stamped and molded and all machining procedures of the automobile back door lock reinforcing plate are finished; the workpiece does not need to be repositioned and is accurate in positioning, and the product quality is stable.

The invention discloses a hand-held water chestnut picker. The picker includes a holding rod, a grip, a handle, a connecting shell, a U-shaped shell, a sleeve shell, a lower stabilization disc, a griprod, a stem cutting device and a driving device. One end of the grip rod is fixedly connected with the connecting shell, the end, away from the holding rod, of the connecting shell is fixedly connected with the U-shaped shell, the U-shaped shell is internally provided with a sleeve shell, the two sides of the sleeve shell are communicated with the two ends of the U-shaped shell, the bottom of thesleeve shell is internally and rotatably connected with a rotating shaft through a bearing, one end of the bearing passes through the sleeve shell and is fixedly connected with the lower stabilization disc, the inner wall of the top of the sleeve shell is fixedly connected with a support rod, the side, near the rotating shaft, of the support rod is slidably connected with a rack, the outer side of the rotating shaft is sleeved with and fixedly provided with a gear column, and a gear is meshed and connected with a gear column. When the picker is used for picking water chestnuts, the picker isconvenient and fast to operate, the picking efficiency is increased, the picking range is increased, and some water chestnuts which are difficult to reach or pick manually can be conveniently picked.

The invention discloses a two-duct propulsion control four-rotor-wing solar butterfly variant airship which comprises airship cloth, rotor wings and a solar film cell panel. A framework type airship cover is arranged inside the airship cloth, the framework type airship cover is fixedly connected with the airship cloth, the rotor wings are fixed to the outer side of the framework type airship cover, rotary vanes are connected above the rotor wings, and the rotor wings are movably connected with the rotary vanes. The solar film cell panel is arranged above the airship cloth, a airship-carrying platform is connected below the frame-type airship cover, an automatic helium charging and exhausting device and a charging and discharging power supply system are fixed to the top of the airship-carrying platform, and horizontal propulsion control ducts are installed on the outer side of the airship-carrying platform. The two-duct propulsion control four-rotor-wing solar butterfly variant airshipis provided with a connecting rod, a framework type airship cover connecting rod and a framework type airship cover connecting frame rod so that the shape of the airship can be changed, the lifting force of the airship can be improved, and the airship is prevented from falling during use.