Folding cylindrical drone frame and drone

Abstract

The foldable cylindrical drone frame includes a mounting frame, on which a folding device is fixedly arranged, and the folding device is rotatably connected to the machine arm to change the front and rear position of the machine arm. The drone made by the frame of the present invention has a power supply at the bottom, so that the center of gravity of the drone is lowered, which is convenient for the machine arm to extend horizontally. It can be mounted on other large flying platforms for throwing or hand-held throwing. The drone frame of the present invention has foldable arms, which reduces the space occupied by the arms and can be quickly folded and stored; it is not restricted by terrain during takeoff and landing.

Description

Technical Field

[0001] The invention relates to the field of unmanned aerial vehicles, and in particular to a frame of an unmanned aerial vehicle with foldable and automatically unfoldable wings. Background Art

[0002] Unmanned aerial vehicles, or "drones" for short, are unmanned aircraft that are controlled by radio remote control equipment and self-contained program control devices, or are operated completely or intermittently autonomously by an onboard computer. Currently, the arms of small-wheelbase drones are fixed and cannot be folded, resulting in a relatively large storage space. The commonly used structure occupies a relatively large lateral space and is not suitable for multiple-machine deployment and multiple mounts. Summary of the invention

[0003] The object of the present invention is to provide a drone frame and a drone, wherein the arms of the drone frame can be folded to adjust the volume of the drone, so that the drone can be stored easily; moreover, the drone can be mounted on other large aircraft platforms and thrown or thrown by hand.

[0004] In order to solve the above technical purpose, the technical solution provided by the present invention is a foldable cylindrical drone frame, including a mounting frame, on which a folding device is fixedly arranged, and the folding device is rotatably connected to the arm to change the front and rear position state of the arm when folded.

[0005] Preferably, the folding device comprises a support frame and a limiting mechanism mounted on the mounting frame, and the arm and the limiting mechanism are rotatably mounted on the support frame, and the front and rear position states of the arm before and after folding are changed by rotating the limiting mechanism.

[0006] Preferably, the limiting mechanism includes a buckle rotatably arranged on the support frame, and a limiting slot is arranged on the buckle. One end of the arm is clamped in the limiting slot in a horizontally extended state, and in a folded and contracted state, the end of the arm is separated from the limiting slot and is located on one side of the buckle; the buckle limits the front and rear position states of the arm when folded.

[0007] Preferably, the inner side of the upper end of the buckle is connected to the support frame through a compression spring, the limit groove is located on the outer side of the buckle between the buckle rotation connection part and the compression spring, and the machine arm is located on the outside of the buckle; the end of the machine arm and the support frame are connected through a tension spring, and the two ends of the tension spring are respectively rotationally connected; when the machine arm is in a horizontally extended state, the tension spring is arranged obliquely.

[0008] Preferably, a pressing handle is provided on the outer side of the upper end of the buckle.

[0009] Preferably, a limiting protrusion is provided at the end of the arm, and the limiting protrusion can be inserted into the limiting groove.

[0010] Preferably, one side of the limiting protrusion at the end of the arm is an arcuate surface, and the outer side surface of the buckle where the limiting groove is located is an arcuate surface matching the arcuate surface of the end of the arm; when the arm is in a horizontally extended state, the limiting protrusion is clamped in the limiting groove, and the arcuate surface of the end of the arm partially contacts the arcuate surface of the outer side surface of the buckle; when the arm is in a folded and contracted state, the arcuate surface of the end of the arm fits against the arcuate surface of the outer side surface of the buckle, and one side of the limiting protrusion fits against the outer side surface of the buckle.

[0011] Preferably, the mounting frame includes a first fixing plate and a second fixing plate, and the support frame is located between the first fixing plate and the second fixing plate; a plurality of notches are provided on the first fixing plate at intervals around the edge, the support frame is located at the notches, and the buckle is located above the notches; when the arm is in a folded and contracted state, the end of the arm is located in the notch.

[0012] The present invention also provides a drone, which uses the drone frame.

[0013] The drone of the present invention is provided with a propeller and a driving motor at the other end of the machine arm relative to the connecting end; various loads and power supplies are installed on the mounting frame; and the power supply is placed downward.

[0014] The drone of the present invention can be mounted on a flying platform and thrown, thrown by hand or taken off by hand.

[0015] The drone of the present invention can be mounted on other large-scale flying platforms for throwing. During the free fall process, the arms are slightly unfolded. After the arms are slightly unfolded, the drone is started and unlocked, the propeller rotates, and the arms are pressed into the limit mechanism by gravity and lift, and the arms are locked. At this time, the frame has the same structure as the frame of an ordinary drone and can perform drone flight missions. When storing, press the four buckles, the limit mechanism is released, the arms are unconstrained, and can be folded downward under the action of gravity. The drone is placed in a cylindrical tube for storage. The frame of the present invention takes out the aircraft from the storage box, and the frame is turned upside down to unfold and lock the arms without any external force, so as to quickly and efficiently enter the ready-to-fly state. It can be taken off by hand or thrown by hand. The hand-throwing flight has the same principle as the mounting on the flying platform for throwing.

[0016] The drone frame of the present invention has foldable arms, which reduces the space occupied by the arms, can be quickly folded and stored, and can be thrown in the air or thrown by hand. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the drone's structure from a bird's-eye view.

[0018] Figure 2 It is a schematic diagram of the side view structure of the UAV.

[0019] Figure 3 It is a schematic diagram of the structure between the first fixing plate, the second fixing plate, the support frame, and the machine arm.

[0020] Figure 4 It is a schematic diagram of the structure between the first fixing plate, the second fixing plate and the supporting member.

[0021] Figure 5 It is a schematic diagram of the buckle structure.

[0022] Figure 6 It is a schematic diagram of the structure of the locking state between the machine arm and the buckle when the machine arm is in a horizontally extended state.

[0023] Figure 7 It is a schematic diagram of the structure where the machine arm and the buckle are disengaged.

[0024] Figure 8 It is a schematic diagram of the structure after the aircraft arm is folded and retracted. DETAILED DESCRIPTION

[0025] For the above technical solution, a preferred embodiment is now given and specifically described in conjunction with the drawings. Figures 1 to 8 ,in:

[0026] The drone frame includes a mounting base 1, a first fixing plate 101 and a second fixing plate 102 which are parallel to each other, and the first fixing plate and the second fixing plate are made of carbon material. A notch 103 is provided at the position where the arm 20 is to be installed on the first fixing plate 101, and the width of the notch 103 is sufficient to allow the end portion of the arm 20 to be received in the notch, and the notch 103 is used to accommodate and limit the folded and contracted arm.

[0027] The folding device is installed between the first fixed plate and the second fixed plate and is located at the notch 103. The folding device includes a support frame 30, which includes two parallel support members 300. The two support members are installed between the first fixed plate and the second fixed plate at the positions on both sides of the notch 103, and the support members 300 are fixedly connected to the first fixed plate and the second fixed plate. A limiting mechanism is arranged between the two support members, and the limiting mechanism is a buckle 40. The lower end of the buckle 40 is rotatably installed between the two support members 300 through a rotating shaft, and the upper end of the buckle 40 is connected to the support member through a compression spring 401. The compression spring 401 is located on the inner side of the buckle, and a handle 404 is arranged on the outer side surface of the upper end of the buckle. The outer side surface of the buckle below the handle 404 is arranged as an arc surface 403. At the arc surface 403, a limiting groove 402 is arranged on the outer side surface of the buckle between the compression spring 401 and the buckle rotating shaft.

[0028] A rotating shaft 301 and a pin 302 are respectively arranged on the two supporting members located outside the buckle. The pin 302 is located above the rotating shaft 301.

[0029] The machine arm 20, whose connecting end 201 is rotatably mounted between the two supporting members 300 via a rotating shaft 301, is located above the notch 103 and outside the buckle 40. A hollow portion is provided between the machine arm connecting end and the free end of the machine arm, near the side of the machine arm connecting end. One end of the tension spring 202 is rotatably mounted on the pin 302, and the other end is rotatably mounted on the hollow portion of the machine arm via the pin 203. When the machine arm is in a horizontally extended state, the tension spring 202 is in an obliquely tightened state.

[0030] A limiting protrusion 204 is provided on the connecting end 201 of the machine arm 20. When the machine arm is in a horizontally extended state, the limiting protrusion 204 is clamped on the limiting groove 402 on the buckle 40 to limit the horizontal extension state of the machine arm. The connecting end surface on one side of the limiting protrusion 204 at the connecting end 201 of the machine arm is an arc surface 205. When the machine arm rotates, the arc surface 205 of the connecting end of the machine arm can rotate along the arc surface 403 of the buckle. When the machine arm is in a horizontally extended state, the arc surface 205 of the connecting end of the machine arm is partially in contact with the arc surface 403 of the buckle; when the machine arm is in a folded and contracted state, that is, when the machine arm is in an approximately vertical relationship with the first fixing plate and the second fixing plate, the arc surface 205 at the connecting end 201 of the machine arm is in contact with the arc surface 403 on the outer side of the buckle, and one side of the limiting protrusion 204 is in contact with the outer side of the buckle above the arc surface 403 of the buckle 40. The outer side of the buckle is used to limit the folding and contracting state of the machine arm. When the end of the machine arm changes from the horizontally extended state to the folded and contracted state, the tension spring 202 also changes from the obliquely tightened state to the vertical natural state.

[0031] The drone frame is folded: when the machine arm is horizontally extended, the limiting protrusion 204 at the connecting end of the machine arm is clamped in the limiting groove 402 of the buckle 40, the tension spring 202 obliquely tightens the machine arm, and the compression spring 401 provides an outward supporting force for the upper end of the buckle, so that the limiting protrusion of the machine arm and the limiting groove of the buckle are pressed tightly to provide a limit for the horizontal state of the machine arm; when the machine arm is folded, the buckle handle is pressed inward to compress the compression spring, so that the buckle rotates inward, so that the limiting protrusion 204 at the connecting end of the machine arm is released from the limit of the buckle 40 The arm is disengaged from the positioning groove 402, and the machine arm rotates downward under the action of gravity. The buckle is released, and the arc surface of the machine arm rotates along the arc surface 403 on the outer side of the buckle. At the same time, the buckle gives the connecting end of the machine arm an outward rotation pressure through the elastic force of the compression spring, prompting it to fold quickly. After folding into place, the arc surface 403 on the outer side of the buckle fits against the arc surface 205 on the machine arm, and the side of the limiting protrusion 204 connected to the arc surface 205 abuts against the outer side of the buckle above the arc surface 403 of the buckle. The two ends of the tension spring 202 rotate, so that the tension spring is turned from the oblique tensioning device to a vertical natural state. After folding, the drone is stored in the storage tube.

[0032] When the machine arm needs to be opened, an external force is applied to the machine arm, and the machine arm rotates upward under the action of the external force. The limiting protrusion at the connecting end of the machine arm presses the buckle to rotate inward until the limiting protrusion at the connecting end of the machine arm enters the limiting groove, and the machine arm stops rotating upward. At this time, the buckle rotates outward under the elastic force of the compression spring, presses against the connecting end of the machine arm, and locks the limiting protrusion and the limiting groove of the machine arm to achieve horizontal limit. At this time, the tension spring changes from a vertical natural state to a diagonally tightened state, providing support force for the machine arm.

[0033] External force is the artificial external force, or the lift when the drone is throwing. When throwing in the air, the arms are slightly opened outward, the propellers are opened, and the lift is used to drive the arms to rotate and press into the buckle. The aerial throwing can be done by drone or hand.

[0034] When the drone arm is opened, it can also be achieved by gravity. Take the drone out of the storage tube and place it in reverse, so that the drone arm faces upward and the mounting frame faces downward. Under the action of gravity, the arm overcomes the buckle limit rotation, and the limit protrusion enters the limit groove of the buckle and automatically locks, quickly putting the drone in a flight-ready state.

[0035] When the above-mentioned drone frame is in use, a propeller and a driving motor are installed on the other end of the arm relative to the connection end, that is, the free end of the arm, and various loads and power supplies are installed on the mounting frame. The power supply is placed downward to make the center of gravity of the drone lower, which helps the drone to be horizontal and upward when it is thrown.

[0036] Compared with other drone models that must take off and land in an open and flat area, the drone frame of the present invention is not restricted by terrain when taking off and landing.

Claims

1. A foldable cylindrical drone frame, characterized in that: It comprises a mounting frame, on which a folding device is fixedly arranged, and the folding device is rotatably connected to the machine arm to change the front and rear folding positions of the machine arm; The folding device comprises a support frame and a limiting mechanism mounted on the mounting frame, the machine arm and the limiting mechanism can be rotatably mounted on the support frame, and the folding front and rear position states of the machine arm can be changed by rotating the limiting mechanism; The limiting mechanism comprises a buckle rotatably arranged on the support frame, and a limiting groove is arranged on the buckle. One end of the machine arm is clamped in the limiting groove in a horizontally extended state, and in a folded and contracted state, the end of the machine arm is separated from the limiting groove and is located on one side of the buckle; the buckle limits the front and rear position states of the machine arm when folded; The inner side of the upper end of the buckle is connected to the support frame through a compression spring, the limit groove is located on the outer side of the buckle between the buckle rotation connection part and the compression spring, and the machine arm is located on the outside of the buckle; the end of the machine arm and the support frame are connected through a tension spring, and both ends of the tension spring are rotationally connected respectively; when the machine arm is in a horizontally extended state, the tension spring is arranged obliquely.

2. The drone frame according to claim 1, characterized in that: A pressing handle is arranged on the outer side of the upper end of the buckle.

3. The drone frame according to claim 1, characterized in that: A limiting protrusion is arranged at the end of the machine arm, and the limiting protrusion can be inserted into the limiting groove.

4. The drone frame according to claim 3, characterized in that: One side of the limiting protrusion at the end of the arm is an arcuate surface, and the outer side surface of the buckle where the limiting groove is located is an arcuate surface matching the arcuate surface of the end of the arm; when the arm is in a horizontally extended state, the limiting protrusion is clamped in the limiting groove, and the arcuate surface of the end of the arm partially contacts the arcuate surface of the outer side surface of the buckle; when the arm is in a folded and contracted state, the arcuate surface of the end of the arm fits and abuts against the arcuate surface of the outer side surface of the buckle, and one side of the limiting protrusion fits and abuts against the outer side surface of the buckle.

5. The drone frame according to any one of claims 1 to 4, characterized in that: The mounting frame includes a first fixing plate and a second fixing plate, and the support frame is located between the first fixing plate and the second fixing plate; a plurality of notches are spaced around the edge of the first fixing plate, the support frame is located at the notches, and the buckle is located above the notches; when the machine arm is in a folded and contracted state, the end of the machine arm is located in the notch.

6. A drone, characterized in that: Use the drone frame described in any one of claims 1 to 5.

7. The drone according to claim 6, characterized in that: A propeller and a driving motor are installed at the other end of the machine arm relative to the connecting end; various loads and power supplies are installed on the mounting frame; and the power supply is placed at the bottom.

8. The drone according to any one of claims 6 or 7, characterized in that: The UAV can be mounted on a flying platform and thrown, hand-held and thrown, or hand-held and taken off.

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