Anti-collision device applied to low-altitude aircraft

Abstract

The invention relates to an anti-collision device applied to a low-altitude aircraft, in particular to the technical field of aircraft protection. The problem that fan blades are damaged due to the fact that the aircraft shakes easily when landing on the ground in windy weather is solved. Comprising a machine body, the machine body is rotationally connected with a rotating shell, a sliding straight rod is slidably connected into the rotating shell, the rotating shell is fixedly connected with a fixing block, the fixing block is provided with a through hole communicating with the corresponding rotating shell, a sliding plate is slidably connected into the fixing block, and the sliding plate is provided with a first through hole and a second through hole; and the first through hole and the second through hole in the sliding plate are communicated and matched with the through holes of the corresponding fixed blocks. The purpose of pre-fixing and supporting the machine body is achieved through movement of the sliding plate in the fixing block in cooperation with relative movement of the rotating shell and the sliding straight rod, the situation that the machine body shakes in windy weather, so that the fan blades on the machine body collide with the parking apron is avoided, and the stability and safety of the machine body in the falling process are guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of aircraft protection, and in particular to an anti-collision device applied to low-altitude aircraft. Background Art

[0002] As an important part of modern aviation technology, low-altitude aircraft are used in agricultural plant protection, logistics distribution, topographic mapping, emergency rescue and other fields. Existing low-altitude aircraft are usually equipped with anti-collision devices, which mainly focus on the cushioning protection when the bottom bracket of the aircraft contacts the ground to reduce the landing impact. However, when a low-altitude aircraft lands in windy weather, the aircraft will shake sideways during the landing process, and the unstable movement of the aircraft will cause the fan blades located on the circumference of the aircraft (such as the propellers of a multi-rotor drone) to collide with the ground of the apron, causing damage or even destruction of the fan blades. In severe cases, the aircraft will lose power balance and become out of control, which not only endangers the lives of the onboard personnel, but also shortens the service life of the aircraft, increases maintenance costs, and limits the reliability of the aircraft and the ability to perform missions. Therefore, it is necessary to develop a low-altitude aircraft anti-collision device that can protect the aircraft blades during stable landing in windy weather. Summary of the invention

[0003] In order to solve the problem that an aircraft is prone to shaking and causing damage to fan blades when landing in windy weather, the present invention provides an anti-collision device for low-altitude aircraft.

[0004] The specific scheme is: an anti-collision device applied to low-altitude aircraft, comprising an organism, the lower side of the organism is rotatably connected with a rotating shell distributed in a rectangular array, the rotating shell is slidably connected with a sliding straight rod, the lower side of the sliding straight rod is rotatably connected with a rotating support plate, the rotating shell is close to the body The side of the fixed block is fixedly connected to the fixed block, the fixed block is provided with a through hole connected to the corresponding rotating shell, the fixed block is slidably connected with a sliding plate, the sliding plate is provided with a first through hole and a second through hole, the first through hole and the second through hole on the sliding plate are both connected and matched with the through hole of the fixed block, the fixed block is fixedly connected with a liquid storage cylinder connected with its through hole, and a piston straight rod is slidably connected in the liquid storage cylinder, the lower side of the organism is provided with a locking mechanism for controlling the moving speed of the sliding straight rods distributed in the rectangular array, and the side wall of the sliding straight rod is provided with a state detection mechanism for detecting the relative moving distance between it and the corresponding rotating shell.

[0005] As a preferred embodiment of the present invention, the first through hole in the sliding plate is configured to be conical, and the maximum diameter of the first through hole in the sliding plate is smaller than the diameter of the second through hole in the sliding plate, so as to limit the moving speed of the corresponding sliding straight rod in the rotating shell.

[0006] As a preferred embodiment of the present invention, the locking mechanism includes a fixed connecting rod distributed in a rectangular array, the fixed connecting rods distributed in the rectangular array are all fixedly connected to the lower side of the body, the lower side of the fixed connecting rod is fixedly connected to a first fixed cylinder, a piston support rod is slidably connected in the first fixed cylinder, a tension spring is fixedly connected between the first fixed cylinder and the corresponding piston support rod, and an extrusion block is fixedly connected to the piston support rod, and a slope is provided on the side of the extrusion block close to the corresponding rotating shell, and the slope of the extrusion block is extruded and matched with the corresponding rotating shell. The lower side of the body is fixedly connected to a second fixed cylinder, and one side of the second fixed cylinder is connected to a first connecting pipe, the first fixed cylinders distributed in a rectangular array are all connected to the first connecting pipe, a sliding shell is slidably connected in the second fixed cylinder, a spring is fixedly connected between the second fixed cylinder and the sliding shell, a displacement component for controlling the movement of the sliding plates distributed in the rectangular array is provided on the side wall of the second fixed cylinder, and an auxiliary rotating component for controlling the rotation of the corresponding rotating shell is provided on the side wall of the liquid storage cylinder.

[0007] As a preferred embodiment of the present invention, the shifting assembly includes a second connecting tube, the second connecting tube is connected to the other side of the second fixed cylinder, a limit pin is slidably connected to the side wall of the second fixed cylinder, a spring is fixedly connected between the second fixed cylinder and the limit pin, a blind hole which cooperates with the limit pin is provided on the side wall of the sliding shell, a sliding plate is sealingly and slidably connected in the sliding shell, a spring is fixedly connected between the sliding shell and the sliding plate, a first hydraulic cylinder which is connected to the second connecting tube is fixedly connected to the side wall of the rotating shell, and the telescopic end of the first hydraulic cylinder is fixedly connected to the corresponding sliding plate.

[0008] As a preferred embodiment of the present invention, the auxiliary rotating assembly includes a second hydraulic cylinder, the second hydraulic cylinder is fixedly connected to the side wall of the corresponding liquid storage cylinder, the telescopic end of the second hydraulic cylinder is fixedly connected to the corresponding piston straight rod, a spring is fixedly connected between the sliding straight rod and the corresponding rotating support plate, a spring is fixedly connected between the piston straight rod and the corresponding liquid storage cylinder, the second hydraulic cylinder is connected to a liquid guide tube, a side of the body close to the corresponding rotating shell is fixedly connected to an arc-shaped cylinder connected to the liquid guide tube, an arc-shaped piston rod fixed to the corresponding rotating shell is sealingly and slidably connected inside the arc-shaped cylinder, and a tension spring is fixedly connected between the arc-shaped cylinder and the corresponding arc-shaped piston rod.

[0009] As a preferred embodiment of the present invention, the state detection mechanism includes a fixed sleeve, the fixed sleeve is fixedly connected to the side wall of the corresponding rotating shell, a sliding rod is slidably connected in the fixed sleeve and is extruded and matched with the corresponding sliding straight rod, a spring is fixed between the fixed sleeve and the corresponding sliding rod, and a speed limiting component for controlling the connecting area of ​​the first through hole therein is provided on the side of the sliding plate away from the corresponding first hydraulic cylinder.

[0010] As a preferred embodiment of the present invention, the speed limiting assembly includes a third hydraulic cylinder, the third hydraulic cylinder is fixed to the side of the corresponding sliding plate away from the corresponding first hydraulic cylinder, the third hydraulic cylinder is connected to a guide tube connected to the side of the corresponding fixed sleeve away from the corresponding sliding straight rod, the telescopic end of the third hydraulic cylinder is fixed to a blocking plate slidably connected to the corresponding sliding plate, and the blocking plate is matched with the first through hole of the corresponding sliding plate for blocking.

[0011] As a preferred embodiment of the present invention, the maximum area of ​​the first through hole of the sliding plate blocked by the blocking plate is only half, so as to limit the relative movement of the rotating shells distributed in a rectangular array and the corresponding sliding straight rods.

[0012] As a preferred embodiment of the present invention, it also includes a buffer limit mechanism distributed in a rectangular array, the buffer limit mechanisms distributed in a rectangular array are respectively arranged on the lower side of the corresponding rotating support plate, the buffer limit mechanism is used to buffer the extrusion of the corresponding rotating support plate, the buffer limit mechanism includes a buffer plate, the buffer plate is slidably connected to the lower side of the corresponding rotating support plate, a tension spring is fixedly connected between the buffer plate and the corresponding rotating support plate, a connecting rod is fixedly connected to the upper side of the rotating support plate, a connecting slide rod is slidingly connected to the upper side of the connecting rod, a one-way wheel is arranged on the side of the connecting slide rod away from the corresponding connecting rod, a spring is fixedly connected between the one-way wheel and the corresponding connecting rod, the buffer plate is fixedly connected to a rack meshing with the corresponding one-way wheel, the rack penetrates the corresponding rotating support plate, and a reset component for controlling the movement of the corresponding one-way wheel is arranged on the upper side of the rotating support plate.

[0013] As a preferred embodiment of the present invention, the reset assembly includes a fixed support rod, the fixed support rod is fixedly connected to the upper side of the corresponding rotating support plate, the buffer plate and the corresponding rotating support plate are slidably connected to a limiting slide rod, the lower side of the limiting slide rod is fixedly connected to an extrusion plate slidably connected to the corresponding buffer plate, the fixed support rod is slidably connected to a sliding bent plate, the sliding bent plate is provided with a sliding groove that limits sliding with the corresponding limiting slide rod, and the sliding bent plate is fixedly connected to the corresponding one-way wheel.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The present invention achieves the purpose of pre-fixed support for the fuselage by moving the sliding plate in the fixed block in coordination with the relative movement of the rotating shell and the sliding straight rod, thereby avoiding the shaking of the fuselage in windy weather and causing the upper fan blades to collide with the apron, thereby ensuring the stability and safety of the fuselage during the falling process.

[0015] 2. The extrusion cooperation between the extrusion block and the rotating shell in the locking mechanism ensures the stability and balance of the support of the machine body by the four rotating shells of the device, reducing the influence of the sliding of the machine body on its landing positioning.

[0016] 3. By moving the blocking plate in the speed limiting assembly, the speed of the sliding straight rod moving toward the rotating shell is controlled, so that the aircraft body is placed stably and slowly on the apron, ensuring the safety of the aircraft body and the stability of the structure, and indirectly extending the service life of the aircraft body.

[0017] 4. Through the meshing of the one-way wheel and the rack in the buffer limit mechanism, a stable buffer is provided between the rotating support plate and the apron, thereby ensuring the safety and service life of the parts in the device and reducing the possibility of damage to the apron caused by the landing collision of the aircraft. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a three-dimensional structural schematic diagram of the parts of the body and the rotating shell of the present invention; Figure 3 It is a three-dimensional structural schematic diagram of the parts of the sliding straight rod and the rotating support plate of the present invention; Figure 4 It is a three-dimensional structural schematic diagram of the parts of the liquid storage cylinder and the piston straight rod of the present invention; Figure 5 It is a three-dimensional structural schematic diagram of the parts at the fixed block and the sliding plate of the present invention; Figure 6 It is a three-dimensional structural schematic diagram of the parts of the fixed connecting rod and the second fixed cylinder of the present invention; Figure 7 It is a three-dimensional structural schematic diagram of the parts at the first fixed cylinder and the piston support rod of the present invention; Figure 8 It is a three-dimensional structural schematic diagram of the parts of the limit pin and the sliding sheet of the present invention; Fig. 9 It is a three-dimensional structural schematic diagram of the parts of the third hydraulic cylinder and the guide pipe of the present invention; Fig.10 It is a three-dimensional structural schematic diagram of the parts of the fixed sleeve and the sliding rod of the present invention; Fig.11 It is a three-dimensional structural schematic diagram of the parts at the rotating support plate and the buffer plate of the present invention; Fig.12 It is a three-dimensional structural schematic diagram of the one-way wheel and rack parts of the present invention.

[0019] Numbers in the figure: 1-body, 2-rotating shell, 3-sliding straight rod, 4-rotating support plate, 5-fixed block, 6-sliding plate, 7-liquid storage cylinder, 8-piston straight rod, 201-fixed connecting rod, 202-first fixed cylinder, 203-piston support rod, 204-extrusion block, 205-second fixed cylinder, 206-first connecting pipe, 207-sliding shell, 301-second connecting pipe, 302-limiting pin, 303-sliding sheet, 304-first hydraulic Cylinder, 401-second hydraulic cylinder, 402-liquid guide tube, 403-arc cylinder, 404-arc piston rod, 501-fixed sleeve, 502-sliding rod, 601-third hydraulic cylinder, 602-guide tube, 603-blocking plate, 701-buffer plate, 702-connecting rod, 703-connecting slide rod, 704-one-way wheel, 705-rack, 801-fixed support rod, 802-limiting slide rod, 803-extrusion plate, 804-sliding bent plate. DETAILED DESCRIPTION

[0020] The following is combined with Figure 1-Figure 12 , the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0021] Example 1: When an existing aircraft is landing in windy weather, the aircraft is prone to lateral shaking. Landing in a shaking state will cause the circumferential blades of the aircraft (such as the propellers of a multi-rotor drone) to collide with the apron, causing damage or even destruction of the blades, thereby causing the aircraft to lose power balance and become out of control, which not only endangers the lives of the personnel on board, but also shortens the service life of the aircraft.

[0022] An anti-collision device for low-altitude aircraft, referring to Figure 1-Figure 5As shown, it includes an organism 1, the lower side of the organism 1 is rotatably connected to four rotating shells 2 distributed in a rectangular array, a sliding straight rod 3 is slidably connected inside the rotating shell 2, and a rotating support plate 4 is rotatably connected to the lower side of the sliding straight rod 3. The organism 1 is supported and fixed by four pairs of rotating shells 2, sliding straight rods 3 and rotating support plates 4. A fixed block 5 is fixedly connected to the upper side of the rotating shell 2, and the fixed block 5 is provided with a through hole. The through hole of the fixed block 5 is connected to the corresponding rotating shell 2, and a sliding plate 6 is slidably connected inside the fixed block 5. The sliding plate 6 is provided with a first through hole and a second through hole. Taking the sliding plate 6 on the right front side as an example, the inner diameter of the first through hole on the sliding plate 6 gradually decreases from right to left, and the first through hole and the second through hole on the sliding plate 6 are both connected and matched with the through holes of the corresponding fixed block 5. Through the movement of the sliding plate 6, the two through holes on the sliding plate 6 are respectively connected with the through holes of the corresponding fixed block 5. The first through hole in the sliding plate 6 is set to be conical, and the maximum diameter of the first through hole in the sliding plate 6 is smaller than the diameter of the second through hole in the sliding plate 6, which is used to limit the moving speed of the corresponding sliding straight rod 3 in the corresponding rotating shell 2. Through the movement of the sliding plate 6 The fixed block 5 is fixedly connected with a liquid storage cylinder 7, which is connected with the through hole of the corresponding fixed block 5. A piston straight rod 8 is slidably connected in the liquid storage cylinder 7. The rotating shell 2 and the corresponding piston straight rod 8 in the liquid storage cylinder 7 are both filled with hydraulic oil on the side close to the corresponding fixed block 5. When the sliding straight rod 3 moves into the corresponding rotating shell 2, the hydraulic oil in the rotating shell 2 flows into the liquid storage cylinder 7 to store pressure, which is convenient for the subsequent reverse flow of the hydraulic oil to reset. The lower side of the body 1 is provided with a device for controlling the moving speed of the rectangular array distributed sliding straight rod 3 The locking mechanism of the degree is provided, and a state detection mechanism for detecting the relative movement distance between the sliding straight rod 3 and the corresponding rotating shell 2 is provided on the side wall of the sliding straight rod 3. By moving the sliding plate 6, the through hole connecting the sliding plate 6 with the through hole of the fixed block 5 is switched, so as to control the speed at which the hydraulic oil in the rotating shell 2 flows into the liquid storage cylinder 7, so that the rotating shell 2, the sliding straight rod 3 and the rotating support plate 4 support and fix the machine body 1, avoiding the collision of the fan blades of the machine body 1 with the apron due to the shaking of the wind before landing, thereby ensuring the safety of the machine body 1 and the stability of landing.

[0023] Reference Figure 2 and Figure 6-Figure 8As shown, the locking mechanism includes four fixed links 201 distributed in a rectangular array, and the four fixed links 201 are all fixedly connected to the lower side of the body 1. Taking the fixed link 201 on the right front side as an example, a first fixed cylinder 202 is fixedly connected to the lower side of the fixed link 201, and a piston support rod 203 is slidably connected in the first fixed cylinder 202. A tension spring is fixedly connected between the first fixed cylinder 202 and the corresponding piston support rod 203. The tension spring is initially in a stretched state, and the extrusion block 204 and the corresponding rotating shell 2 are initially in an extrusion state. The piston support rod 203 is fixedly connected to the extrusion block 204, and the front side of the extrusion block 204 is provided with an inclined surface, which is inclined to the right from front to back. The inclined surface of the extrusion block 204 is extruded and matched with the rotating shell 2, which is used to squeeze the extrusion block 204 when the rotating shell 2 is rotated and reset, and the extrusion block 204 moves and resets. A second fixed cylinder 205 is fixedly connected to the lower side of the body 1, and the right side of the second fixed cylinder 205 is connected to There is a first connecting tube 206, and the four first fixed cylinders 202 are all connected to the first connecting tube 206. A sliding shell 207 is slidably connected in the second fixed cylinder 205. A spring is fixed between the second fixed cylinder 205 and the sliding shell 207 to push the sliding shell 207 to move and reset. A transposition component for controlling the movement of the four sliding plates 6 is arranged on the side wall of the second fixed cylinder 205, and an auxiliary rotating component for controlling the rotation of the corresponding rotating shell 2 is arranged on the side wall of the liquid storage cylinder 7. The second fixed cylinder 205, the first connecting tube 206 and the corresponding piston support rod 203 in the first fixed cylinder 202 are all filled with hydraulic oil on the side close to the corresponding extrusion block 204. Through the extrusion block 204 and the rotating shell 2, the device can accurately determine whether the four groups of rotating shells 2 and the sliding straight rod 3 support the body 1, which is convenient for subsequent control of the fan blades on the body 1 to stop rotating and stably control the body 1 to land on the apron.

[0024] Reference Figure 2-Figure 4 , Figure 7 and Figure 8As shown, the shifting assembly includes a second connecting pipe 301, the second connecting pipe 301 is connected to the left side of the second fixed cylinder 205, the side wall of the second fixed cylinder 205 is slidably connected to the limit pin 302, a spring is fixed between the second fixed cylinder 205 and the limit pin 302, a blind hole is provided on the side wall of the sliding shell 207, the blind hole of the sliding shell 207 is limited by the limit pin 302, initially the limit pin 302 limits the sliding shell 207, the sliding shell 207 is relatively fixed to the second fixed cylinder 205, and the hydraulic oil in the four first fixed cylinders 202 all enters the second fixed cylinder 205, so that the limit pin 302 can be 02 releases the limit on the sliding shell 207, the sliding shell 207 is sealed and slidably connected with a sliding sheet 303, a spring is fixed between the sliding shell 207 and the sliding sheet 303, a first hydraulic cylinder 304 is fixedly connected to the side wall of the rotating shell 2, the first hydraulic cylinder 304 is connected to the second connecting pipe 301, the telescopic end of the first hydraulic cylinder 304 is fixedly connected to the corresponding sliding plate 6, the second connecting pipe 301 is filled with hydraulic oil, and the sliding shell 207 moves through the second fixed cylinder 205, so as to achieve the purpose of controlling the sliding plate 6 to switch the connecting hole, thereby ensuring the accuracy and stability of the rotating shell 2 and the sliding straight rod 3 supporting the body 1.

[0025] Reference Figure 2 and Figure 3 As shown, the auxiliary rotating assembly includes a second hydraulic cylinder 401, the second hydraulic cylinder 401 is fixedly connected to the side wall of the corresponding liquid storage cylinder 7, the telescopic end of the second hydraulic cylinder 401 is fixedly connected to the corresponding piston straight rod 8, a spring is fixedly connected between the sliding straight rod 3 and the corresponding rotating support plate 4, which is used to ensure that the rotating support plate 4 is gradually fitted with the ground through rotation, a spring is fixedly connected between the piston straight rod 8 and the corresponding liquid storage cylinder 7, the second hydraulic cylinder 401 is connected to a liquid guide tube 402, an arc tube 403 is fixedly connected to the lower side of the body 1, the lower side of the arc tube 403 is connected to the liquid guide tube 402, and an arc piston is sealed and slidably connected inside the arc tube 403 Rod 404, the arc piston rod 404 is fixedly connected to the corresponding rotating shell 2, and a tension spring is fixedly connected between the arc cylinder 403 and the corresponding arc piston rod 404, which is used to assist the rotating shell 2 to rotate back to its original position while maintaining the stability of its own rotation angle. The lower side of the arc piston rod 404 in the arc cylinder 403 and the liquid guide tube 402 are filled with hydraulic oil. The rotation of the rotating shell 2 is controlled by the movement of the piston straight rod 8, so that the total length of the rotating shell 2 and the sliding straight rod 3 is shortened, while the rotating support plate 4 remains relatively fixed with the apron, avoiding sliding of the rotating support plate 4 and the apron, affecting the stability of the device supporting the body 1.

[0026] Reference Figure 2 , Fig. 9 and Fig.10As shown, the state detection mechanism includes a fixed sleeve 501, which is fixedly connected to the side wall of the corresponding rotating shell 2. A sliding rod 502 is slidably connected in the fixed sleeve 501. The sliding rod 502 is squeezed and matched with the corresponding sliding straight rod 3. The sliding straight rod 3 squeezes the sliding rod 502 to achieve the purpose of detecting the relative movement distance between the rotating shell 2 and the corresponding sliding straight rod 3. A spring is fixedly connected between the fixed sleeve 501 and the corresponding sliding rod 502. A speed limiting component for controlling the communication area of ​​the first through hole in the sliding plate 6 is provided on the upper side of the sliding plate 6. Hydraulic oil is filled in the fixed sleeve 501. The relative movement of the fixed sleeve 501 and the sliding rod 502 can be detected to detect the relative movement distance between the rotating shell 2 and the sliding straight rod 3.

[0027] Reference Figure 2 , Fig. 9 and Fig.10 As shown, the speed limiting component includes a third hydraulic cylinder 601, which is fixedly connected to the upper side of the corresponding sliding plate 6, and the third hydraulic cylinder 601 is connected to a guide tube 602, and the guide tube 602 is connected to the upper side of the corresponding fixed sleeve 501. The telescopic end of the third hydraulic cylinder 601 is fixedly connected to a blocking plate 603, and the blocking plate 603 is matched with the first through hole of the corresponding sliding plate 6. Initially, the first through hole in the sliding plate 6 is completely connected, and the blocking plate 603 is slidably connected to the corresponding sliding plate 6. The fixed sleeve 501 and the sliding rod 502 move relative to each other to control the speed limiting component. The moving distance of the blocking plate 603 in the sliding plate 6 controls the connection area of ​​the first through hole of the sliding plate 6. The maximum area of ​​the first through hole of the corresponding sliding plate 6 blocked by the blocking plate 603 is only half, which is used to limit the relative movement of the rotating shell 2 and the corresponding sliding straight rod 3 distributed in the rectangular array. The guide tube 602 is filled with hydraulic oil. The blocking plate 603 blocks the first through hole of the sliding plate 6 to achieve the purpose of controlling the relative movement speed of the rotating shell 2 and the corresponding sliding straight rod 3, thereby ensuring the stability and accuracy of the device in placing the body 1 on the apron.

[0028] After the device is installed on the lower side of the aircraft, in windy weather conditions, when the aircraft moves downward to land while shaking, the body 1 drives the four rotating shells 2 and the parts connected thereto to move downward synchronously, and the two rotating support plates 4 on the front side first contact and squeeze the ground. Taking the rotating shell 2 on the right front side as an example, as the body 1 drives the rotating support plate 4 to move downward through the rotating shell 2 and the sliding straight rod 3, the rotating support plate 4 rotates clockwise (from front to back) on the sliding straight rod 3 and compresses the spring connected thereto, until the lower side of the rotating support plate 4 fits against the apron, and the rotating support plate 4 stops moving.

[0029] When the rotating support plate 4 is fitted with the apron, as the machine body 1 moves downward to land, the four rotating shells 2 and the sliding straight rod 3 gradually support the machine body 1, and the sliding straight rod 3 moves into the rotating shell 2. The hydraulic oil in the rotating shell 2 enters the liquid storage cylinder 7 through the through hole of the fixed block 5 and the second through hole of the sliding plate 6. The hydraulic oil in the liquid storage cylinder 7 increases, and the piston straight rod 8 moves to the left and compresses the spring connected to it. In the process of the sliding straight rod 3 moving into the rotating shell 2, the rotating support plate 4 does not move after fitting with the apron, and the piston straight rod 8 drives the telescopic end of the second hydraulic cylinder 401 to move to the left. The telescopic end of the second hydraulic cylinder 401 extends out, and the hydraulic oil in the second hydraulic cylinder 401 flows into the lower side of the arc piston rod 404 in the arc cylinder 403 through the liquid guide tube 402. The arc piston rod 404 stretches the tension spring connected to it, and finally the rotating shell 2 rotates counterclockwise (viewed from front to back) relative to the body 1. The arc piston rod 404 in the arc cylinder 403 moves, so that the sliding straight rod 3 and the rotating shell 2 swing as a whole during the relative movement, thereby achieving the purpose of stable fit between the rotating support plate 4 and the apron, and avoiding the sliding of the rotating support plate 4 on the apron to affect the stability of the device supporting the body 1.

[0030] During the rotation of the rotating shell 2, the rotating shell 2 releases the squeezing of the squeezing block 204, and the piston support rod 203 drives the squeezing block 204 to move forward under the tension of the tension spring connected to it. The hydraulic oil on the front side of the piston support rod 203 in the first fixed cylinder 202 flows into the right side of the sliding shell 207 in the second fixed cylinder 205 through the first connecting pipe 206. Since the limiting pin 302 limits the sliding shell 207, the sliding shell 207 in the second fixed cylinder 205 does not move, and the hydraulic oil on the right side of the sliding shell 207 enters it, and the sliding sheet 303 moves to the left and compresses the spring connected to it. The body 1 moves downward, and the other two rotating support plates 4 then contact the apron and drive related parts to repeat the above operations. When the hydraulic oil in the four first fixed cylinders 202 flows into the second fixed cylinder 205, the elastic force of the spring connected to the sliding sheet 303 is greater than the resistance of the limit pin 302 limiting the sliding shell 207, and the sliding shell 207 moves to the left and compresses the spring on its left side. The blind hole of the sliding shell 207 squeezes the limit pin 302, and the limit pin 302 moves downward and compresses the spring connected to it. The limit pin 302 moves out of the blind hole of the sliding shell 207, and the blind hole limit of the sliding shell 207 is released.

[0031] During the process of the sliding shell 207 in the second fixed cylinder 205 moving to the left, the space on the left side of the sliding shell 207 in the second fixed cylinder 205 is reduced, and the hydraulic oil on the left side of the sliding shell 207 in the second fixed cylinder 205 flows into the four first hydraulic cylinders 304 through the second connecting pipe 301. The telescopic end of the first hydraulic cylinder 304 drives the sliding plate 6 to move downward in the fixed block 5, and the through hole connecting the sliding plate 6 with the through hole of the fixed block 5 is switched from the second through hole to the first through hole. Since the maximum inner diameter of the first through hole on the sliding plate 6 is smaller than the inner diameter of the second through hole on the sliding plate 6, and since the through hole of the sliding plate 6 is tapered, the hydraulic oil in the rotating shell 2 passes through the fixed block 5. 5 and the first through hole of the sliding plate 6, the speed of the liquid flowing into the reservoir 7 is reduced, and the speed of the sliding straight rod 3 entering the rotating shell 2 is reduced. At this time, the operator stops the rotation of the fan blades on the body 1, and the body 1 loses the upward lift. Only the four pairs of rotating shells 2 and the sliding straight rod 3 support the body 1. Under the action of the gravity of the body 1, the hydraulic oil in the rotating shell 2 continues to flow into the reservoir 7, so that the body 1 continues to fall slowly. The contact state of the four rotating support plates 4 and the apron is judged by the squeezing block 204 and the rotating shell 2. Only after the four rotating shells 2 support the body 1, the rotation of the fan blades stops, ensuring the stability of the support and placement of the body 1 by the device.

[0032] During the movement of the sliding straight rod 3 into the rotating shell 2, the sliding straight rod 3 contacts and squeezes the sliding rod 502, and the sliding rod 502 moves into the fixed sleeve 501 and compresses the spring connected thereto. The hydraulic oil in the fixed sleeve 501 flows into the third hydraulic cylinder 601 through the guide pipe 602, and the telescopic end of the third hydraulic cylinder 601 drives the blocking plate 603 to move downward, and the blocking plate 603 gradually blocks half of the flow area of ​​the conical hole of the sliding plate 6. The speed of the sliding straight rod 3 moving into the rotating shell 2 is further reduced, thereby ensuring the stability and safety of the body 1 itself and the operators therein during the falling process. When the bracket on the lower side of the body 1 contacts the apron, the body 1 completes the landing, and the rotating shell 2 and the sliding straight rod 3 move to assist the body 1 in falling, thereby avoiding the collision of the fan blades on the body 1 with the apron, ensuring the stability and continuity of the placement of the body 1, and improving the safety of the fan blades on the body 1.

[0033] When the fan blades on the body 1 start and rotate, the body 1 moves upward, and the piston straight rod 8 is driven to move right by the elastic force of the spring connected to it. The hydraulic oil in the liquid storage cylinder 7 flows back into the rotating shell 2, and the sliding straight rod 3 moves downward from the rotating shell 2 and gradually recovers to the initial position. The hydraulic oil in the guide tube 602 and the guide tube 402 flows in the above-mentioned reverse direction. The sliding rod 502 moves downward from the fixed sleeve 501 under the elastic force of the spring connected to it, and the telescopic end of the third hydraulic cylinder 601 drives the blocking plate 603 to move upward, and the blocking plate 603 releases the blockage of the first through hole of the sliding plate 6. The arc piston rod 404 in the arc cylinder 403 moves downward and recovers to the initial position under the tension of the tension spring connected to it, the rotating shell 2 swings to recover to the initial position, and the rotating support plate 4 rotates and recovers to the initial position under the elastic force of the spring connected to it.

[0034] When the rotating shell 2 swings to restore the initial position, the rotating shell 2 contacts and squeezes the inclined surface of the squeezing block 204, and the squeezing block 204 drives the piston support rod 203 to move into the first fixed cylinder 202. The piston support rod 203 stretches the tension spring connected to it, and the hydraulic oil in the first connecting pipe 206 performs the above-mentioned reverse flow, and the hydraulic oil on the left side of the sliding shell 207 in the second fixed cylinder 205 is reduced. The sliding shell 207 and the sliding plate 303 both move to the right to restore the initial position under the elastic force of the spring connected to them. When the limit pin 302 is aligned with the blind hole of the sliding shell 207, the limit pin 302 moves upward under the elastic force of the spring connected to it and is inserted into the blind hole of the sliding shell 207, and the sliding shell 207 restores the limited state. The hydraulic oil in the second connecting pipe 301 performs the above-mentioned reverse flow, and the telescopic end of the first hydraulic cylinder 304 drives the sliding plate 6 to move and restore the initial position. At this point, all parts have restored their initial positions. When the machine body 1 falls again, the device repeats the above-mentioned stable fixing operation.

[0035] Example 2: When an existing aircraft is descending to the apron, the aircraft's support will collide with the apron, causing the aircraft to vibrate. In windy weather, the shaking of the aircraft will increase the impact force between its support and the apron, thereby increasing the intensity of the vibration generated in the aircraft, which will not only greatly affect passenger comfort and flight safety, but may also damage internal equipment, increase structural burden, and even threaten overall flight safety and operational controllability.

[0036] Based on Example 1, Figure 2 , Fig.11 and Fig.12As shown, it also includes four buffer limit mechanisms distributed in a rectangular array, and the four buffer limit mechanisms are respectively arranged on the lower side of the corresponding rotating support plate 4. The buffer limit mechanism is used to buffer the extrusion of the corresponding rotating support plate 4. The buffer limit mechanism includes a buffer plate 701, and the buffer plate 701 is slidably connected to the lower side of the corresponding rotating support plate 4. A tension spring is fixedly connected between the buffer plate 701 and the corresponding rotating support plate 4, which is used to buffer the collision between the buffer plate 701 and the apron. A connecting rod 702 is fixedly connected to the upper side of the rotating support plate 4, and a connecting slide bar 703 is slidably connected to the upper side of the connecting rod 702. A one-way wheel 704 is arranged on the rear side of the connecting slide bar 703. The one-way wheel 704 is unidirectional and can only rotate clockwise (from front to back). The one-way wheel 704 and the corresponding connecting rod 7 02 is fixedly connected with a spring, and the buffer plate 701 is fixedly connected with a rack 705, and the rack 705 is meshed with the corresponding one-way wheel 704. The one-way wheel 704 and the rack 705 are initially in a misaligned state. The one-way wheel 704 is meshed with the rack 705, so that the buffer plate 701 and the rotating support plate 4 can only approach each other during the buffering process, and the rack 705 penetrates the corresponding rotating support plate 4. A reset component for controlling the movement of the corresponding one-way wheel 704 is arranged on the upper side of the rotating support plate 4. The one-way wheel 704 is meshed with the rack 705, and the buffer plate 701 is used to buffer the collision between the rotating support plate 4 and the apron, thereby ensuring the safety of the parts in the device, reducing the vibration received by the body 1 during the landing to the apron, and improving the safety of the connection of the precision parts in the body 1.

[0037] Reference Figure 3 , Fig.11 and Fig.12 As shown, the reset assembly includes a fixed support rod 801. Taking the fixed support rod 801 on the right front side as an example, the fixed support rod 801 is fixedly connected to the upper side of the corresponding rotating support plate 4. The buffer plate 701 and the corresponding rotating support plate 4 are slidably connected to the limited slide rod 802. The lower side of the limited slide rod 802 is fixedly connected with an extrusion plate 803. The extrusion plate 803 is slidably connected to the corresponding buffer plate 701. The fixed support rod 801 is slidably connected to a sliding bent plate 804. The sliding bent plate 804 is provided with a sliding groove. The sliding groove is slidably connected to the corresponding limited slide rod 802. The front side of the slide groove is a horizontal straight groove, and the rear side is an inclined groove from front to back and upward. The upper side of the limiting slide bar 802 is initially located at the connection between the inclined groove and the horizontal straight groove on the corresponding sliding curved plate 804, which is used to make the sliding curved plate 804 move backward when the limiting slide bar 802 moves upward. The sliding curved plate 804 is fixedly connected to the corresponding one-way wheel 704, and the meshing state of the one-way wheel 704 and the rack 705 is controlled by the movement of the limiting slide bar 802 and the extrusion plate 803, thereby ensuring the accuracy and speed of the buffering and release of the buffer plate 701.

[0038] When the aircraft body 1 moves downward to perform the falling operation, taking the rotating support plate 4 on the right front side as an example, the rotating support plate 4 drives the buffer plate 701 to move synchronously, the buffer plate 701 contacts and squeezes the apron, and the buffer plate 701 drives the rotating support plate 4 to rotate synchronously. The buffer plate 701 stops after being fitted with the apron. At the same time, the squeezing plate 803 contacts and squeezes the apron. The squeezing plate 803 moves upward relative to the buffer plate 701, and the squeezing plate 803 drives the limiting slide bar 802 to slide upward. The limiting slide bar 802 slides in the sliding groove of the sliding bent plate 804. The sliding bent plate 804 moves forward and pushes the connecting slide bar 703 and the one-way wheel 704 to move forward. The connecting slide bar 703 moves into the connecting rod 702. The spring between the connecting rod 702 and the one-way wheel 704 is compressed. If the one-way wheel 704 and rack 705 are not aligned, the spring between the connecting rod 702 and the one-way wheel 704 is compressed, and as the rotating support plate 4 moves downward, the buffer plate 701 moves upward relative to the rotating support plate 4, the buffer plate 701 stretches the tension spring connected to it, and the buffer plate 701 drives the rack 705 to move upward, and as the rack 705 moves upward relative to the rotating support plate 4, when the one-way wheel 704 and the rack 705 are aligned, the one-way wheel 704 moves forward and engages with the rack 705, and the spring between the connecting rod 702 and the one-way wheel 704 continues to be compressed, and then the rack 705 moves upward relative to the rotating support plate 4 to drive the one-way wheel 704 to rotate. Since the one-way wheel 704 is unidirectional, the rack 705 cannot move downward, thereby avoiding the up and down shaking of the machine body 1 during buffering.

[0039] Repeat the above-mentioned stable support and placement operations. When the body 1 starts and leaves the apron, the one-way wheel 704 moves backward under the elastic force of the spring connected to it to release the engagement with the rack 705, and the buffer plate 701 moves to reset. The one-way wheel 704 drives the sliding curved plate 804 to move backward and reset through the spring. The sliding groove of the sliding curved plate 804 drives the limiting slide bar 802 and the extrusion plate 803 to move downward and reset. At this point, all parts are restored to their initial positions. Through the cooperation of the one-way wheel 704 and the rack 705, the collision force between the rotating support plate 4 and the apron when the body 1 shakes is weakened, thereby ensuring the safety of the parts in the device and the stability of the mechanism, and reducing the internal vibration of the body 1 when it falls to the ground.

[0040] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An anti-collision device for low-altitude aircraft, comprising an organism (1), characterized in that: The machine body (1) further comprises rotating shells (2) arranged in a rectangular array, wherein the rotating shells (2) arranged in a rectangular array are all rotatably connected to the lower side of the machine body (1), a sliding straight rod (3) is slidably connected inside the rotating shell (2), a rotating support plate (4) is rotatably connected to the lower side of the sliding straight rod (3), a fixed block (5) is fixedly connected to the side of the rotating shell (2) close to the machine body (1), the fixed block (5) is provided with a through hole communicating with the corresponding rotating shell (2), a sliding plate (6) is slidably connected inside the fixed block (5), and the sliding plate (6) is provided with a through hole communicating with the corresponding rotating shell (2), and a sliding plate (6) is provided in the fixed block (5). A first through hole and a second through hole are provided, the first through hole and the second through hole on the sliding plate (6) are both connected and matched with the through hole of the corresponding fixed block (5), the fixed block (5) is fixedly connected with a liquid storage cylinder (7) connected with its through hole, a piston straight rod (8) is slidably connected in the liquid storage cylinder (7), a locking mechanism for controlling the moving speed of the sliding straight rods (3) distributed in a rectangular array is provided on the lower side of the body (1), and a state detection mechanism for detecting the relative moving distance between the sliding straight rods (3) and the corresponding rotating shell (2) is provided on the side wall of the sliding straight rods (3).

2. The anti-collision device for low-altitude aircraft according to claim 1, characterized in that: The first through hole in the sliding plate (6) is configured to be conical, and the maximum diameter of the first through hole in the sliding plate (6) is smaller than the diameter of the second through hole in the sliding plate (6), so as to limit the moving speed of the corresponding sliding straight rod (3) in the corresponding rotating shell (2).

3. The anti-collision device for low-altitude aircraft according to claim 1, characterized in that: The locking mechanism comprises fixed connecting rods (201) distributed in a rectangular array, the fixed connecting rods (201) distributed in a rectangular array are all fixedly connected to the lower side of the body (1), a first fixed cylinder (202) is fixedly connected to the lower side of the fixed connecting rod (201), a piston support rod (203) is slidably connected inside the first fixed cylinder (202), a tension spring is fixedly connected between the first fixed cylinder (202) and the corresponding piston support rod (203), the piston support rod (203) is fixedly connected to an extrusion block (204), a side of the extrusion block (204) close to the corresponding rotating shell (2) is provided with an inclined surface, and the inclined surface of the extrusion block (204) is extrusion-matched with the corresponding rotating shell (2). A second fixed cylinder (205) is fixedly connected to the lower side of the body (1); one side of the second fixed cylinder (205) is connected to a first connecting tube (206); the first fixed cylinders (202) distributed in a rectangular array are all connected to the first connecting tube (206); a sliding shell (207) is slidably connected inside the second fixed cylinder (205); a spring is fixedly connected between the second fixed cylinder (205) and the sliding shell (207); a displacement component for controlling the movement of the sliding plates (6) distributed in the rectangular array is arranged on the side wall of the second fixed cylinder (205); and an auxiliary rotating component for controlling the rotation of the corresponding rotating shell (2) is arranged on the side wall of the liquid storage cylinder (7).

4. The anti-collision device for low-altitude aircraft according to claim 3, characterized in that: The shifting assembly comprises a second connecting pipe (301), the second connecting pipe (301) being connected to the other side of the second fixed cylinder (205), a limiting pin (302) being slidably connected to the side wall of the second fixed cylinder (205), a spring being fixedly connected between the second fixed cylinder (205) and the limiting pin (302), a blind hole being provided on the side wall of the sliding shell (207) and being limitedly matched with the limiting pin (302), a sliding sheet (303) being sealingly slidably connected inside the sliding shell (207), a spring being fixedly connected between the sliding shell (207) and the sliding sheet (303), a first hydraulic cylinder (304) being connected to the second connecting pipe (301) being fixedly connected to the side wall of the rotating shell (2), and a telescopic end of the first hydraulic cylinder (304) being fixedly connected to the corresponding sliding plate (6).

5. The anti-collision device for low-altitude aircraft according to claim 4, characterized in that: The auxiliary rotating assembly comprises a second hydraulic cylinder (401), the second hydraulic cylinder (401) being fixedly connected to the side wall of the corresponding liquid storage cylinder (7), the telescopic end of the second hydraulic cylinder (401) being fixedly connected to the corresponding piston straight rod (8), a spring being fixedly connected between the sliding straight rod (3) and the corresponding rotating support plate (4), a spring being fixedly connected between the piston straight rod (8) and the corresponding liquid storage cylinder (7), the second hydraulic cylinder (401) being connected to a liquid guide tube (402), a curved cylinder (403) being connected to the liquid guide tube (402) being fixedly connected to a side of the machine body (1) close to the corresponding rotating shell (2), a curved piston rod (404) being fixedly connected to the corresponding rotating shell (2) in a sealed and sliding manner inside the curved cylinder (403), and a tension spring being fixedly connected between the curved cylinder (403) and the corresponding curved piston rod (404).

6. The anti-collision device for low-altitude aircraft according to claim 5, characterized in that: The state detection mechanism comprises a fixed sleeve (501), the fixed sleeve (501) being fixedly connected to the side wall of the corresponding rotating shell (2), a sliding rod (502) being slidably connected inside the fixed sleeve (501) and being pressed and matched with the corresponding sliding straight rod (3), a spring being fixedly connected between the fixed sleeve (501) and the corresponding sliding rod (502), and a speed limiting component for controlling the connecting area of ​​the first through hole inside the sliding plate (6) being arranged on the side of the sliding plate (6) away from the corresponding first hydraulic cylinder (304).

7. The anti-collision device for low-altitude aircraft according to claim 6, characterized in that: The speed limiting component comprises a third hydraulic cylinder (601), the third hydraulic cylinder (601) being fixedly connected to a side of the corresponding sliding plate (6) away from the corresponding first hydraulic cylinder (304), the third hydraulic cylinder (601) being connected to a guide tube (602) connected to a side of the corresponding fixed sleeve (501) away from the corresponding sliding straight rod (3), the telescopic end of the third hydraulic cylinder (601) being fixedly connected to a blocking plate (603) slidably connected to the corresponding sliding plate (6), the blocking plate (603) being matched to block a first through hole of the corresponding sliding plate (6).

8. The anti-collision device for low-altitude aircraft according to claim 7, characterized in that: The maximum area of ​​the first through hole of the corresponding sliding plate (6) blocked by the blocking plate (603) is only half, and is used to limit the relative movement of the rotating shells (2) distributed in a rectangular array and the corresponding sliding straight rods (3).

9. The anti-collision device for low-altitude aircraft according to claim 1, characterized in that: The device further comprises a buffering and limiting mechanism distributed in a rectangular array, wherein the buffering and limiting mechanisms distributed in a rectangular array are respectively arranged on the lower side of the corresponding rotating support plate (4), and the buffering and limiting mechanism is used to buffer the extrusion of the corresponding rotating support plate (4). The buffering and limiting mechanism comprises a buffer plate (701), wherein the buffer plate (701) is slidably connected to the lower side of the corresponding rotating support plate (4), a tension spring is fixedly connected between the buffer plate (701) and the corresponding rotating support plate (4), and a connecting rod (702) is fixedly connected to the upper side of the rotating support plate (4). The connecting rod (702) The upper side of the connecting rod (702) is limitedly slidably connected with a connecting slide rod (703), a one-way wheel (704) is arranged on the side of the connecting slide rod (703) away from the corresponding connecting rod (702), a spring is fixedly connected between the one-way wheel (704) and the corresponding connecting rod (702), the buffer plate (701) is fixedly connected with a rack (705) meshing with the corresponding one-way wheel (704), the rack (705) penetrates the corresponding rotating support plate (4), and a reset component for controlling the movement of the corresponding one-way wheel (704) is arranged on the upper side of the rotating support plate (4).

10. The anti-collision device for low-altitude aircraft according to claim 9, characterized in that: The reset assembly comprises a fixed support rod (801), the fixed support rod (801) being fixedly connected to the upper side of the corresponding rotating support plate (4), the buffer plate (701) and the corresponding rotating support plate (4) being slidably connected to a limit slide rod (802), the lower side of the limit slide rod (802) being fixedly connected to an extrusion plate (803) slidably connected to the corresponding buffer plate (701), the fixed support rod (801) being slidably connected to a sliding bent plate (804), the sliding bent plate (804) being provided with a sliding groove for limiting sliding with the corresponding limit slide rod (802), and the sliding bent plate (804) being fixedly connected to the corresponding one-way wheel (704).

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