Unmanned aerial vehicle warehouse facilitating unloading and unmanned aerial vehicle

Abstract

The invention relates to the technical field of unmanned aerial vehicle warehouses, in particular to an unmanned aerial vehicle warehouse facilitating unloading and an unmanned aerial vehicle. A retarding unit is arranged between the bin body and the unmanned aerial vehicle body and comprises a mounting plate fixedly arranged at the bottom of the unmanned aerial vehicle body, a connecting frame is fixedly arranged on the lower portion of the mounting plate, a bearing ring is fixedly arranged on the connecting frame, the axis of the bearing ring is vertically arranged, and a rotating ball is rotationally arranged in an inner ring of the bearing ring. A lower connecting shaft is vertically and fixedly arranged on the lower portion of the rotating ball, the two ends of the lower connecting shaft are fixedly connected with the rotating ball and the upper portion of the bin body respectively, and a gravity center control unit is arranged at the bottom of the bin body and used for changing the shape of the bottom of the bin body. The stability of the cabin body in the transportation process is improved, and the influence on normal flight of the unmanned aerial vehicle body when the cabin body is subjected to the crosswind effect is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of drone cargo warehouses, and in particular to a drone cargo warehouse and a drone that are convenient for unloading. Background Art

[0002] At present, drones often use mechanical grippers to transport and load cargo. The cargo box is placed on the mechanical gripper through manual operation, and the mechanical gripper grabs the cargo box. This requires a lot of manpower operation, resulting in a lot of waste of manpower costs. Among them, when the mechanical gripper grabs the cargo box during transportation, it is easy to cause the cargo box to tilt or fall, which is inconvenient to use.

[0003] Chinese patent publication number CN209160600U discloses a cargo hold for a logistics drone, comprising a box body with a lower opening and at least two lifting mechanisms respectively arranged on the left and right sides of the bottom of the box body; wherein, the lifting mechanism comprises a shell fixedly mounted on the bottom edge of the box body and a lifting handle for lifting and unloading the cargo box, a self-locking servo for driving the lifting handle to rotate horizontally is provided in the shell body, and a clamping device for clamping and fixing the cargo box fixed in the box body is provided on the box body.

[0004] The clamping device in the above scheme can only clamp a single cargo, and the size of drones also varies. Setting a clamping device to clamp the cargo in the cargo hold of a large drone will inevitably lead to a reduction in the capacity of the cargo hold. This is because more space is needed to place multiple clamping devices. If the clamping device is removed, since the cargo hold is directly fixed to the drone, the cargo will slide back and forth in the cargo hold during transportation. Such constantly sliding cargo can easily have a greater impact on the normal flight of the drone. Summary of the Invention

[0005] In response to the above problems, a drone cargo warehouse and a drone that are easy to unload are provided. By arranging a center of gravity control unit at the bottom of the warehouse body, when the warehouse body is loaded with cargo, the center of gravity control unit switches the bottom of the warehouse body to a concave state. At the same time, it is arranged on a receiving ring and a rotating ball, so that when the drone body turns, moves forward, moves backward, etc., it will not provide greater thrust to overcome the impact of the warehouse body containing cargo on the drone body, thereby reducing the energy consumption of the drone body and improving the maneuverability of the drone body. At the same time, the tilt of the drone body during maneuvering will not affect the warehouse body, reducing the probability of the cargo in the warehouse body moving or rolling. When the warehouse body is shaken by crosswind, the warehouse body drives the rotating ball to rotate in the receiving ring through the lower connecting shaft, so that the center of gravity of the warehouse body carrying cargo is not easily offset, and the warehouse body is more stable during transportation.

[0006] In order to solve the problems of the existing technology, the present invention provides a drone cargo warehouse that is convenient for unloading, including a warehouse body arranged at the lower part of the drone body; a deceleration unit is arranged between the warehouse body and the drone body, the deceleration unit includes a mounting plate fixedly arranged at the bottom of the drone body, a connecting frame fixedly arranged at the lower part of the mounting plate, a receiving ring fixedly arranged on the connecting frame, the axis of the receiving ring is vertically arranged, a rotating ball is rotatably arranged in the inner ring of the receiving ring, a lower connecting shaft is vertically fixedly arranged at the lower part of the rotating ball, two ends of the lower connecting shaft are fixedly connected to the rotating ball and the upper part of the warehouse body respectively, a center of gravity control unit is arranged at the bottom of the warehouse body, the center of gravity control unit is used to change the shape of the bottom of the warehouse body, when the warehouse body is not loaded with cargo, the shape of the bottom of the warehouse body is horizontal, when the warehouse body is stored in the warehouse body, the shape of the bottom of the warehouse body is concave, and the projection of the lowest position of the bottom of the warehouse body in the concave state in the vertical direction is located at the center of the warehouse body.

[0007] Preferably, the center of gravity control unit includes a bottom plate arranged in the warehouse body for movement in the vertical direction, an elastic support membrane for receiving the goods is provided on the upper part of the bottom plate, the four sides of the elastic support membrane are fixedly connected to the inner wall of the warehouse body, and the bottom plate has a highest position and a lowest position when moving in the vertical direction. When the bottom plate is at the highest position, the elastic support membrane is in a horizontal state, and when the bottom plate is in the lowest position, the elastic support membrane is in a concave state, and the two ends of the bottom plate pass through the two sides of the warehouse body along the length direction of the drone body.

[0008] Preferably, a lifting unit for driving the base plate to move in the vertical direction is provided on one side of the warehouse body, and the lifting unit includes a first threaded rod provided in the vertical direction, and the first threaded rod moves in the vertical direction. A limiting groove is provided in the vertical direction on the peripheral wall of the first threaded rod, and a shell is fixedly provided on the side of the warehouse body where the first threaded rod is provided. The first threaded rod vertically penetrates the upper part of the shell and slides with the shell in the vertical direction, and a gear ring is provided on the outer periphery of the first threaded rod, and the gear ring is threadedly engaged with the first threaded rod, and a first rotary driver for driving the gear ring to rotate is provided on one side of the gear ring.

[0009] Preferably, a power generation unit is provided on the mounting plate, and the power generation unit includes a contact plate fixedly provided at the bottom of the mounting plate, the lower end surface of the contact plate is a curved surface, and the center of the lower end surface of the contact plate coincides with the center of the rotating ball, and a roller is rotatably provided at the lower part of the contact plate, and the roller rolls in cooperation with the lower part of the contact plate, and when the rotating ball rotates, the roller rotates synchronously with the rotating ball around the center of the rotating ball, and a generator is provided on one side of the roller.

[0010] Preferably, an upper connecting shaft is vertically fixedly provided on the upper part of the rotating ball, a follower frame is rotatably provided on the upper part of the upper connecting shaft, and the roller is rotatably provided on the follower frame.

[0011] Preferably, three positioning rods are arranged in parallel on one side of the first threaded rod, and the first threaded rod and the three positioning rods are respectively arranged on the four corners of the base plate. Winders are provided on the upper part of the first threaded rod and the upper part of the three positioning rods, and a traction rope is provided inside the winder. The traction rope in the winder directly above the first threaded rod is fixedly connected to the upper end of the first threaded rod, and the traction rope in the winder directly above the positioning rod is fixedly connected to the upper end of the positioning rod. A torque sensor is provided in the winder.

[0012] Preferably, positioning blocks are fixedly provided on the upper part of the first threaded rod and each positioning rod, and four positioning slots are provided on the lower part of the mounting plate. The four positioning blocks correspond to the four positioning slots one by one in the vertical direction, and the positioning blocks are plugged into the positioning slots.

[0013] Preferably, an inlet and an outlet are provided through the side wall of the warehouse body, a switch door is rotatably provided on the inlet and the outlet, a slot is provided on the upper part of the switch door, a locking pin is provided on the warehouse body above the switch door and moves in the vertical direction, the locking pin passes through the upper part of the warehouse body, and the locking pin is plugged into the slot.

[0014] Preferably, an ejection unit is provided in the warehouse body, and the ejection unit includes a second threaded rod rotatable along the width direction of the drone body, the second threaded rod is located in the warehouse body, and a push plate moving along the width direction of the drone body is also provided in the warehouse body, the second threaded rod passes through the push plate and cooperates with the push plate thread, when the elastic support membrane is in a horizontal state, the bottom of the push plate slides with the upper end surface of the elastic support membrane, and a second rotation driver for driving the second threaded rod to rotate is provided on one side of the second threaded rod.

[0015] The present invention also relates to a drone, comprising a drone cargo hold that is convenient for unloading.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The present invention provides a center of gravity control unit at the bottom of the warehouse body, so that when the warehouse body is loaded with cargo, the center of gravity control unit switches the bottom of the warehouse body to a concave state. At the same time, it is provided on the receiving ring and the rotating ball, so that when the unmanned vehicle body performs turning, moving forward, backward, etc., it does not provide greater thrust to overcome the influence of the warehouse body containing cargo on the unmanned vehicle body, thereby reducing the energy consumption of the unmanned vehicle body and improving the maneuverability of the unmanned vehicle body. At the same time, the tilt of the unmanned vehicle body during maneuvering will not affect the warehouse body, thereby reducing the probability of the cargo in the warehouse body moving or rolling. When the warehouse body is shaken by crosswind, the warehouse body drives the rotating ball to rotate in the receiving ring through the lower connecting shaft, thereby making it difficult for the center of gravity of the warehouse body carrying cargo to shift. The warehouse body is more stable during transportation. At the same time, the warehouse body loaded with cargo will not affect the maneuverability of the unmanned vehicle body, and the shaking of the warehouse body by crosswind will not directly affect the unmanned vehicle body, thereby reducing the influence of the warehouse body on the normal flight of the unmanned vehicle body when it is affected by crosswind.

[0018] 2. When the drone is maneuvering or the cabin is affected by crosswinds, the rotating ball rotates within the receiving ring. The upper connecting shaft, located above the rotating ball, rotates synchronously with the rotating ball. The upper connecting shaft drives the follower frame to swing synchronously, and the follower frame drives the roller to roll on the lower end face of the contact plate. To ensure that the roller can always roll, the upper connecting shaft and the follower frame rotate in coordination. This results in the roller's rotation direction being bidirectional, so the generator needs to use a bidirectional rotating generator to adapt to the bidirectional rotation of the roller. The generator can still generate electricity normally when the roller is bidirectional. A battery is installed on one side of the cabin. The generator transmits electrical energy to the battery for storage during the flight of the drone, and can also directly power the battery in the drone, thereby improving the drone's endurance. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional schematic diagram of a drone cargo hold that is convenient for unloading according to the present invention.

[0020] Figure 2 This is a three-dimensional diagram of a drone cargo hold that is easy to unload, with some doors and shells removed. Figure 1 .

[0021] Figure 3 The invention is a drone cargo hold that is convenient for unloading Figure 2 A local enlarged schematic diagram of point A in the middle.

[0022] Figure 4 It is a cutaway perspective schematic diagram of a drone cargo hold that is convenient for unloading according to the present invention.

[0023] Figure 5 The invention is a drone cargo hold that is convenient for unloading Figure 4 A partial enlarged schematic diagram of point B in the middle.

[0024] Figure 6 This is a cutaway perspective diagram of a drone cargo hold for easy unloading according to the present invention, with the bottom of the hold in a sunken state. Figure 1 .

[0025] Figure 7 The invention is a drone cargo hold that is convenient for unloading Figure 6 A partial enlarged schematic diagram of point C in the middle.

[0026] Figure 8 The invention is a drone cargo hold that is convenient for unloading Figure 6 A local enlarged schematic diagram of point D in the middle.

[0027] Figure 9 This is a three-dimensional diagram of a drone cargo hold that is easy to unload, with some doors and shells removed. Figure 2 .

[0028] Figure 10 This is a cutaway perspective diagram of a drone cargo hold for easy unloading according to the present invention, with the bottom of the hold in a sunken state. Figure 2 .

[0029] The numbers in the figure are:

[0030] 1. Chamber; 11. Inlet / Outlet; 12. Door Opener / Closer; 13. Locking Pin; 14. Ejection Unit; 141. Second Threaded Rod; 142. Push Plate; 143. Second Rotary Drive; 144. Second Gear; 145. Third Gear; 2. Slowing Unit; 21. Mounting Plate; 22. Adapter Ring; 23. Connecting Bracket; 24. Rotating Ball; 241. Lower Connecting Shaft; 25. Center of Gravity Control Unit; 251. Elastic Support Membrane; 252. Bottom Plate; 252 1. Positioning rod; 2522. Winder; 2523. Traction rope; 2524. Positioning block; 2525. Positioning slot; 253. Lifting unit; 2531. First rotary drive; 2532. First threaded rod; 2533. Gear ring; 2534. Housing; 2535. First gear; 26. Power generation unit; 261. Contact plate; 262. Roller; 263. Generator; 264. Follow-up frame; 27. Upper connecting shaft; 3. Unmanned aerial vehicle body. DETAILED DESCRIPTION

[0031] In order to further understand the features, technical means, specific objectives and functions achieved by the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] Reference Figure 1 、 Figure 2 、 Figure 4 and Figure 8: A drone cargo hold convenient for unloading, comprising a hold body 1 arranged at the lower part of a drone body 3; a deceleration unit 2 is arranged between the hold body 1 and the drone body 3, the deceleration unit 2 comprises a mounting plate 21 fixedly arranged at the bottom of the drone body 3, a connecting frame 23 is fixedly arranged at the lower part of the mounting plate 21, a receiving ring 22 is fixedly arranged on the connecting frame 23, the axis of the receiving ring 22 is vertically arranged, a rotating ball 24 is rotatably arranged in the inner ring of the receiving ring 22, and the lower part of the rotating ball 24 is vertically fixedly arranged. A lower connecting shaft 241 is provided, and the two ends of the lower connecting shaft 241 are fixedly connected to the rotating ball 24 and the upper part of the warehouse body 1 respectively. A center of gravity control unit 25 is provided at the bottom of the warehouse body 1. The center of gravity control unit 25 is used to change the shape of the bottom of the warehouse body 1. When there is no cargo in the warehouse body 1, the shape of the bottom of the warehouse body 1 is horizontal. When cargo is stored in the warehouse body 1, the shape of the bottom of the warehouse body 1 is concave, and the projection of the lowest position of the bottom of the warehouse body 1 in the concave state in the vertical direction is located at the center of the warehouse body 1.

[0033] With the development of drone technology, more and more drones have cargo carrying capabilities. In the existing technology, most drones with cargo carrying capabilities are equipped with a warehouse 1. Some warehouses 1 are arranged inside the drone body 3, and some warehouses 1 are arranged under the drone body 3. However, no matter which warehouse 1 layout is used, it is necessary to ensure that the cargo in the warehouse 1 cannot shake during transportation. If the cargo in the warehouse 1 is not fixed due to loading reasons, when the drone body 3 takes off, the cargo in the warehouse 1 will slide freely in the warehouse 1, causing the center of gravity of the warehouse 1 to change continuously. As the drone flies at high altitude, the cargo will not be able to move freely. It will also be affected by airflow, crosswind, etc., so as long as the drone body 3 shakes due to external reasons, the goods in the warehouse body 1 will also move, causing the drone body 3 to shake again, and the flight posture needs to be adjusted in real time, which has a greater impact on flight safety. In order to prevent the goods from moving with the shaking of the drone body 3, the existing technology usually provides a clamping device on the drone body 3, and clamps the goods through the clamping device to ensure that the goods will not move in the warehouse body 1 when the drone body 3 shakes. However, the capacity of the warehouse body 1 equipped with the clamping device is limited, and a large amount of space is occupied by the clamping device.

[0034] In order to avoid the above situation, the cargo hold 1 of the drone is optimized so that the cargo in the hold 1 will not slide freely due to shaking without the clamping device. The specific structure and working steps of the mitigation unit 2 are as follows:

[0035] The warehouse body 1 is set under the drone, and an entrance and exit 11 is set on one side of the warehouse body 1. The staff loads the goods into the warehouse body 1 through the entrance and exit 11 on the side of the warehouse body 1. When the warehouse body 1 is not loaded with goods, the bottom of the warehouse body 1 is in a horizontal state. When the warehouse body 1 starts to load goods, the center of gravity control unit 25 controls the bottom of the warehouse body 1 to switch from a horizontal state to a concave state, and the loaded goods are piled up at the bottom of the concave state of the warehouse body 1. Since the lowest position of the concave part of the warehouse body 1 is at the center of the warehouse body 1, the weight at the center of the warehouse body 1 must be greater than the weight around the warehouse body 1, ensuring the stability of the warehouse body 1. The center of gravity can be concentrated in the center of the warehouse body 1. The depression at the bottom of the warehouse body 1 has a limiting effect on the goods in the depression. It is worth noting that the amount of goods stored in the depression is limited. Some goods will still be piled up on the upper part of the depression. The goods located on the upper part of the depression of the warehouse body 1 will still move during the operation of the drone body 3. In order to overcome the above problem, a receiving ring 22 and a rotating ball 24 are set between the warehouse body 1 and the drone body 3, so that the rotating ball 24 is fixedly connected to the warehouse body 1 through the lower connecting shaft 241. When the drone body 3 encounters crosswinds while flying in the air, the drone The body 3 and the warehouse body 1 need to be analyzed in two parts. First, the drone body 3 can adjust its posture by itself, while the warehouse body 1 will shake after being affected by the airflow. The warehouse body 1 cannot adjust its own posture, and the goods inside the warehouse body 1 will also move within the warehouse body 1 due to the shaking of the warehouse body 1. In this way, the warehouse body 1 drives the rotating ball 24 to rotate through the lower connecting shaft 241, so that the rotating ball 24 rotates in the receiving ring 22. In this way, the shaking warehouse body 1 will not directly affect the drone body 3, avoiding the situation where the drone body 3 suddenly changes its flight posture due to the shaking of the warehouse body 1. , reducing the risk of flight. At the same time, the unmanned aerial vehicle body 3 will not always be in a horizontal state during flight. This is because the unmanned aerial vehicle body 3 will tilt when turning, moving forward, moving backward, etc. After the warehouse body 1 and the unmanned aerial vehicle body 3 are connected by the rotating ball 24 and the receiving ring 22, the maneuverability of the unmanned aerial vehicle body 3 is better. If the unmanned aerial vehicle body 3 and the warehouse body 1 are fixedly connected, the unmanned aerial vehicle body 3 needs to drive the warehouse body 1 to tilt together when maneuvering, resulting in the unmanned aerial vehicle body 3 needing to provide greater thrust to overcome the weight of the goods in the warehouse body 1, and also increasing the probability of the goods in the warehouse body 1 sliding.

[0036] In this way, after the deceleration unit 2 is set up, the center of gravity of the warehouse body 1 carrying the goods is not easily shifted, and the warehouse body 1 is more stable during transportation. At the same time, the warehouse body 1 loaded with goods will not affect the maneuverability of the unmanned aerial vehicle 3, and the warehouse body 1 will not directly act on the unmanned aerial vehicle 3 when shaken by crosswinds, reducing the impact of the warehouse body 1 on the normal flight of the unmanned aerial vehicle 3 when affected by crosswinds.

[0037] Reference Figure 2 、 Figure 6 and Figure 10: The center of gravity control unit 25 includes a bottom plate 252 that is arranged in the warehouse body 1 and moves in the vertical direction. An elastic support membrane 251 for receiving the goods is provided on the upper part of the bottom plate 252. The four sides of the elastic support membrane 251 are fixedly connected to the inner wall of the warehouse body 1. The bottom plate 252 has a highest position and a lowest position when moving in the vertical direction. When the bottom plate 252 is in the highest position, the elastic support membrane 251 is in a horizontal state. When the bottom plate 252 is in the lowest position, the elastic support membrane 251 is in a concave state. The two ends of the bottom plate 252 pass through the two sides of the warehouse body 1 along the length direction of the unmanned aerial vehicle body 3.

[0038] Reference Figure 2-Figure 4 : A lifting unit 253 for driving the base plate 252 to move in the vertical direction is provided on one side of the warehouse body 1, and the lifting unit 253 includes a first threaded rod 2532 provided in the vertical direction. The first threaded rod 2532 moves in the vertical direction, and a limiting groove is provided in the vertical direction on the peripheral wall of the first threaded rod 2532. A shell 2534 is fixedly provided on the side of the warehouse body 1 where the first threaded rod 2532 is provided. The first threaded rod 2532 vertically penetrates the upper part of the shell 2534 and slides with the shell 2534 in the vertical direction. A gear ring 2533 is provided on the outer periphery of the first threaded rod 2532, and the gear ring 2533 is threadedly engaged with the first threaded rod 2532. A first rotation driver 2531 for driving the gear ring 2533 to rotate is provided on one side of the gear ring 2533.

[0039] A first gear 2535 is fixedly mounted on the output end of the first rotary driver 2531. The first gear 2535 and the gear ring 2533 mesh with each other. The first rotary driver 2531 is preferably a servo motor. When the first rotary driver 2531 drives the gear ring 2533 to rotate via the first gear 2535, the first threaded rod 2532 begins to move vertically, thereby driving the base plate 252 to move vertically. When the base plate 252 moves to its lowest position, the elastic support membrane 251 becomes concave. When the base plate 252 moves to its highest position, the elastic support membrane 251 becomes horizontal.

[0040] Reference Figure 6 and Figure 8 : A power generation unit 26 is provided on the mounting plate 21. The power generation unit 26 includes a contact plate 261 fixedly provided at the bottom of the mounting plate 21. The lower end surface of the contact plate 261 is a curved surface, and the center of the lower end surface of the contact plate 261 coincides with the center of the rotating ball 24. A roller 262 is rotatably provided at the lower part of the contact plate 261. The roller 262 rolls with the lower part of the contact plate 261, and when the rotating ball 24 rotates, the roller 262 rotates synchronously with the rotating ball 24 around the center of the rotating ball 24. A generator 263 is provided on one side of the roller 262.

[0041] Reference Figure 8An upper connecting shaft 27 is vertically fixedly provided on the upper part of the rotating ball 24 , a follower frame 264 is rotatably provided on the upper part of the upper connecting shaft 27 , and the roller 262 is rotatably provided on the follower frame 264 .

[0042] When the drone 3 maneuvers or the cabin 1 encounters a crosswind, the rotating ball 24 rotates within the receiving ring 22. The upper connecting shaft 27 disposed above the rotating ball 24 rotates synchronously with the rotating ball 24. The upper connecting shaft 27 drives the follower frame 264 to swing synchronously. The follower frame 264 drives the roller 262 to roll on the lower end surface of the contact plate 261. To ensure that the roller 262 can always roll, the upper connecting shaft 27 and the follower frame 264 rotate in coordination. This results in the roller 262 rotating in a bidirectional direction. Therefore, the generator 263 needs to be a bidirectional rotating generator 263 to accommodate the bidirectional rotation of the roller 262. A battery is provided on one side of the cabin 1. The generator 263 transmits electrical energy to the battery for storage during the flight of the drone 3. It can also directly power the battery in the drone 3, thereby improving the drone's endurance.

[0043] Reference Figure 9 and Figure 10 : Three positioning rods 2521 are arranged in parallel on one side of the first threaded rod 2532. The first threaded rod 2532 and the three positioning rods 2521 are respectively arranged on the four corners of the base plate 252. A winder 2522 is provided on the upper part of the first threaded rod 2532 and the upper part of the three positioning rods 2521. A traction rope 2523 is provided inside the winder 2522. The traction rope 2523 in the winder 2522 located directly above the first threaded rod 2532 is fixedly connected to the upper end of the first threaded rod 2532. The traction rope 2523 in the winder 2522 located directly above the positioning rod 2521 is fixedly connected to the upper end of the positioning rod 2521. A torque sensor is provided in the winder 2522.

[0044] Reference Figure 9 and Figure 10 : A positioning block 2524 is fixedly provided on the upper part of the first threaded rod 2532 and each positioning rod 2521, and four positioning grooves 2525 are provided on the lower part of the mounting plate 21. The four positioning blocks 2524 correspond to the four positioning grooves 2525 one by one in the vertical direction, and the positioning blocks 2524 and the positioning grooves 2525 are plugged into each other.

[0045] The length of the first threaded rod 2532 is the same as the length of the positioning rod 2521. For ease of understanding, this article takes one of the positioning rods 2521 as an example for description. When the drone body 3 lands and waits for loading, the winder 2522 just above the positioning rod 2521 completely retracts the traction rope 2523, and the positioning block 2524 is inserted into the positioning slot 2525. When loading is completed, the drone body 3 starts to take off, and the winder 2522 gradually releases the traction rope 2523. When the bottom plate 252 drops to the lowest position, the elastic support film 251 is concave under the action of the cargo, and the winder 2522 continues to release the traction rope 2523. The length of the traction rope 2523 that continues to be released needs to be determined according to actual conditions. The longer the traction rope 2523 continues to be released after the bottom plate 252 reaches the lowest position, the greater the amplitude of the rotation of the rotating ball 24 driven by the warehouse body 1, and when the drone When the body 3 transports the warehouse body 1 to the designated position and starts to descend, before landing, all the winders 2522 operate synchronously, the winders 2522 reel the traction rope 2523, and at the same time the lifting unit 253 drives the bottom plate 252 to rise. The initial reeling speed of the winder 2522 is greater than the rising speed of the bottom plate 252, so that before the bottom plate 252 rises to the highest position, the traction rope 2523 is in a taut state, and the torque sensor arranged in the winder 2522 reduces the reeling speed after detecting the torque, so that the reeling speed is the same as the rising speed of the bottom plate 252. Since the four traction ropes 2523 are all in a taut state, the rotating ball 24 located on the upper part of the warehouse body 1 serves as the fulcrum of the warehouse body 1, so that the warehouse body 1 is no longer affected by the external crosswind, and the upper end face of the warehouse body 1 is always parallel to the lower end face of the mounting plate 21, ensuring that the positioning block 2524 can be smoothly inserted into the positioning groove 2525.

[0046] Reference Figure 1 and Figure 2 : An entrance and exit 11 is provided through the side wall of the warehouse body 1, and a switch door 12 is rotatably provided on the entrance and exit 11. A slot is provided on the upper part of the switch door 12, and a locking pin 13 is provided on the warehouse body 1 above the switch door 12 so as to move in the vertical direction. The locking pin 13 penetrates the upper part of the warehouse body 1, and the locking pin 13 is plugged into the slot.

[0047] When loading and unloading, the locking pin 13 connected to the switch door 12 is pulled upward, and then the switch door 12 is rotated to open. After loading or unloading is completed, the switch door 12 is rotated to close on the entrance and exit 11. Since the locking pin 13 relies on its own gravity to be inserted into the slot of the switch door 12, it is also necessary to lift the locking pin 13 when closing the switch door 12, and then put down the locking pin 13 after the switch door 12 is closed.

[0048] Reference Figure 5 and Figure 10: An ejection unit 14 is provided in the warehouse body 1, and the ejection unit 14 includes a second threaded rod 141 that is rotatable along the width direction of the drone body 3. The second threaded rod 141 is located in the warehouse body 1, and a push plate 142 that moves along the width direction of the drone body 3 is also provided in the warehouse body 1. The second threaded rod 141 passes through the push plate 142 and is threadedly engaged with the push plate 142. When the elastic support membrane 251 is in a horizontal state, the bottom of the push plate 142 is slidably engaged with the upper end surface of the elastic support membrane 251. On one side of the second threaded rod 141 is provided a second rotation driver 143 for driving the second threaded rod 141 to rotate.

[0049] In order to improve the safety of the unmanned aerial vehicle body 3 during flight, the second rotary driver 143 is arranged on one side of the second threaded rod 141. In order to ensure that the second rotary driver 143 can drive the second threaded rod 141 normally, a second gear 144 is fixedly provided on the output end of the second rotary driver 143. A third gear 145 is engaged with one side of the second gear 144. The third gear 145 is fixedly connected to the end of the second threaded rod 141. The second rotary driver 143 is preferably a servo motor. When the second rotary driver 143 is started, the second rotary driver 143 drives the third gear 145 to rotate through the second gear 144, thereby causing the second threaded rod 141 to rotate. In this way, the push plate 142 can push the goods on the elastic support membrane 251 out, and there is no need for staff to reach into the warehouse body 1 to unload the goods.

[0050] Reference Figures 1-10 : The present invention also relates to a drone, comprising a drone cargo hold that is convenient for unloading.

[0051] Working principle: When the warehouse body 1 is not loaded with goods, the bottom of the warehouse body 1 is in a horizontal state. When the warehouse body 1 starts to load goods, the center of gravity control unit 25 controls the bottom of the warehouse body 1 to switch from a horizontal state to a concave state, and the loaded goods are piled up at the bottom of the concave of the warehouse body 1. Since the lowest position of the concave part of the warehouse body 1 is located at the center of the warehouse body 1, the weight at the center of the warehouse body 1 must be greater than the weight around the warehouse body 1, ensuring that the center of gravity of the warehouse body 1 can be concentrated at the center of the warehouse body 1. The concave part of the bottom of the warehouse body 1 has a limiting effect on the goods located in the concave part. It is worth noting that the amount of goods stored in the concave part is limited, and some goods will still be piled up on the upper part of the concave part. The goods located on the upper part of the concave part of the warehouse body 1 will still move during the operation of the unmanned aerial vehicle 3.

[0052] In order to overcome the above problems, a receiving ring 22 and a rotating ball 24 are set between the warehouse body 1 and the drone body 3, so that the rotating ball 24 is fixedly connected to the warehouse body 1 through the lower connecting shaft 241. When the drone body 3 encounters crosswinds while flying in the air, the drone body 3 and the warehouse body 1 need to be divided into two parts for analysis. First, the drone body 3 can adjust its posture by itself, while the warehouse body 1 will shake after being affected by the airflow. The warehouse body 1 cannot adjust its own posture, and the goods inside the warehouse body 1 will also move within the warehouse body 1 due to the shaking of the warehouse body 1. In this way, the warehouse body 1 drives the rotating ball 24 to rotate through the lower connecting shaft 241, so that the rotating ball 24 rotates in the receiving ring 22, so that the shaking warehouse body 1 will not shake directly The swaying of the warehouse body 1 and the tilting of the drone body 3 prevent the drone body 3 from suddenly changing its flight posture due to the shaking of the warehouse body 1, thereby reducing the risk of flight. At the same time, the drone body 3 will not always be in a horizontal state during flight. This is because the drone body 3 will tilt when turning, moving forward, or moving backward. After the warehouse body 1 and the drone body 3 are connected by the rotating ball 24 and the receiving ring 22, the maneuverability of the drone body 3 is better. If the drone body 3 and the warehouse body 1 are fixedly connected, the drone body 3 needs to drive the warehouse body 1 to tilt together when maneuvering, resulting in the drone body 3 needing to provide greater thrust to overcome the weight of the goods in the warehouse body 1, and also increasing the probability of the goods in the warehouse body 1 sliding.

[0053] The above embodiments merely represent one or more embodiments of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of protection of the present invention. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present invention, and such modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the appended claims.

Claims

1. A drone cargo hold for easy unloading, comprising a hold body (1) disposed below a drone body (3); It is characterized in that A deceleration unit (2) is provided between the warehouse body (1) and the unmanned aerial vehicle body (3). The deceleration unit (2) comprises a mounting plate (21) fixedly provided at the bottom of the unmanned aerial vehicle body (3). A connecting frame (23) is fixedly provided at the lower portion of the mounting plate (21). A receiving ring (22) is fixedly provided on the connecting frame (23). The axis of the receiving ring (22) is vertically provided. A rotating ball (24) is rotatably provided in the inner ring of the receiving ring (22). A lower connecting shaft (241) is vertically fixedly provided at the lower portion of the rotating ball (24). The lower connecting shaft The two ends of (241) are fixedly connected to the rotating ball (24) and the upper part of the warehouse body (1), respectively. A center of gravity control unit (25) is provided at the bottom of the warehouse body (1). The center of gravity control unit (25) is used to change the shape of the bottom of the warehouse body (1). When the warehouse body (1) is not loaded with goods, the shape of the bottom of the warehouse body (1) is in a horizontal state. When the warehouse body (1) is loaded with goods, the shape of the bottom of the warehouse body (1) is in a concave state, and the projection of the lowest position of the bottom of the warehouse body (1) in the concave state in the vertical direction is located at the center of the warehouse body (1).

2. The drone cargo hold for easy unloading according to claim 1, characterized in that: The center of gravity control unit (25) includes a bottom plate (252) arranged in the warehouse body (1) for movement in the vertical direction. An elastic support membrane (251) for receiving goods is arranged on the upper part of the bottom plate (252). The four sides of the elastic support membrane (251) are fixedly connected to the inner wall of the warehouse body (1). The bottom plate (252) has a highest position and a lowest position when moving in the vertical direction. When the bottom plate (252) is in the highest position, the elastic support membrane (251) is in a horizontal state. When the bottom plate (252) is in the lowest position, the elastic support membrane (251) is in a concave state. The two ends of the bottom plate (252) pass through the two sides of the warehouse body (1) along the length direction of the unmanned aerial vehicle body (3).

3. The drone cargo hold for easy unloading according to claim 2, characterized in that: A lifting unit (253) for driving the bottom plate (252) to move in a vertical direction is provided on one side of the bin body (1). The lifting unit (253) includes a first threaded rod (2532) provided in a vertical direction. The first threaded rod (2532) moves in the vertical direction. A limiting groove is provided in the vertical direction on the peripheral wall of the first threaded rod (2532). A shell (2534) is fixedly provided on the side of the bin body (1) provided with the first threaded rod (2532). The first threaded rod (2532) vertically penetrates the upper part of the shell (2534) and slides with the shell (2534) in the vertical direction. A gear ring (2533) is provided on the outer periphery of the first threaded rod (2532). The gear ring (2533) is threadedly engaged with the first threaded rod (2532). A first rotation driver (2531) for driving the gear ring (2533) to rotate is provided on one side of the gear ring (2533).

4. The drone cargo hold for easy unloading according to claim 1, characterized in that: A power generation unit (26) is provided on the mounting plate (21). The power generation unit (26) includes a contact plate (261) fixedly provided at the bottom of the mounting plate (21). The lower end surface of the contact plate (261) is a curved surface, and the center of the lower end surface of the contact plate (261) coincides with the center of the rotating ball (24). A roller (262) is rotatably provided at the lower portion of the contact plate (261). The roller (262) and the lower portion of the contact plate (261) are in rolling engagement. When the rotating ball (24) rotates, the roller (262) rotates synchronously with the rotating ball (24) around the center of the rotating ball (24). A generator (263) is provided on one side of the roller (262).

5. The drone cargo hold for easy unloading according to claim 4, characterized in that: An upper connecting shaft (27) is vertically fixedly provided on the upper portion of the rotating ball (24), a follower frame (264) is rotatably provided on the upper portion of the upper connecting shaft (27), and a roller (262) is rotatably provided on the follower frame (264).

6. The drone cargo hold for easy unloading according to claim 3, characterized in that: Three positioning rods (2521) are arranged in parallel on one side of the first threaded rod (2532). The first threaded rod (2532) and the three positioning rods (2521) are respectively arranged on the four corners of the bottom plate (252). A winder (2522) is arranged on the upper part of the first threaded rod (2532) and the upper part of the three positioning rods (2521). A traction rope (2523) is sleeved inside the winder (2522). The traction rope (2523) in the winder (2522) located directly above the first threaded rod (2532) is fixedly connected to the upper end of the first threaded rod (2532). The traction rope (2523) in the winder (2522) located directly above the positioning rod (2521) is fixedly connected to the upper end of the positioning rod (2521). A torque sensor is arranged in the winder (2522).

7. The drone cargo hold for easy unloading according to claim 6, characterized in that: A positioning block (2524) is fixedly provided on the upper portion of the first threaded rod (2532) and each positioning rod (2521), and four positioning slots (2525) are provided on the lower portion of the mounting plate (21). The four positioning blocks (2524) correspond to the four positioning slots (2525) in a one-to-one manner in the vertical direction, and the positioning blocks (2524) and the positioning slots (2525) are plugged into each other.

8. The drone cargo hold for easy unloading according to claim 1, characterized in that: An inlet and outlet (11) is provided through the side wall of the bin body (1), a switch door (12) is rotatably provided on the inlet and outlet (11), a slot is provided on the upper portion of the switch door (12), a locking pin (13) is provided on the bin body (1) above the switch door (12) and is movable in the vertical direction, the locking pin (13) passes through the upper portion of the bin body (1), and the locking pin (13) is plugged into and engaged with the slot.

9. The drone cargo hold for easy unloading according to claim 2, characterized in that: An ejection unit (14) is provided in the warehouse body (1), and the ejection unit (14) includes a second threaded rod (141) rotatably provided along the width direction of the unmanned aerial vehicle body (3). The second threaded rod (141) is located in the warehouse body (1), and a push plate (142) is also provided in the warehouse body (1) and moves along the width direction of the unmanned aerial vehicle body (3). The second threaded rod (141) passes through the push plate (142) and is threadedly engaged with the push plate (142). When the elastic support membrane (251) is in a horizontal state, the bottom of the push plate (142) is slidably engaged with the upper end surface of the elastic support membrane (251). A second rotation driver (143) for driving the second threaded rod (141) to rotate is provided on one side of the second threaded rod (141).

10. A drone, characterized in that: A drone cargo hold that is convenient for unloading, comprising the device described in any one of claims 1-9.

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