High-load-ratio gasoline engine of unmanned aerial vehicle

Abstract

The unmanned aerial vehicle high-load-ratio gasoline engine comprises an engine body, an air inlet connector and an air outlet pipe are fixedly arranged on the engine body, a connecting ring is fixedly arranged at the end, away from the engine body, of the air inlet connector, and a plurality of arc-shaped plates are arranged on the connecting ring; the arc-shaped plates are slidably connected with the connecting ring in the direction close to or away from the circle center of the connecting ring, the connecting ring is provided with an adjusting piece used for driving the arc-shaped plates to move, plugging plates are arranged between the adjacent arc-shaped plates and synchronously move along with the arc-shaped plates, and pressing pieces are arranged between the plugging plates and the arc-shaped plates and used for pushing the plugging plates to be attached to the arc-shaped plates. A pressure intensity detector used for detecting the pressure intensity of gas in the exhaust pipe is further arranged in the gas inlet connector, and the pressure intensity detector is electrically connected with the adjusting piece and used for controlling the adjusting piece to work. The engine air inlet structure has the effect that the load ratio of the engine is increased while the air inlet requirements of the engine under different conditions are met.

Description

Technical Field

[0001] The invention relates to the field of unmanned aerial vehicle engines, and in particular to a high load-to-weight ratio gasoline engine for unmanned aerial vehicles. Background Art

[0002] Drones are modern equipment that can be widely used in monitoring, navigation and positioning, and logistics transportation. With the continuous development of technology, the functions of drones are constantly improving. The engine, as the power source of drones, is an important part of drones. According to different working methods, drone engines are also divided into internal combustion engines and electric motors.

[0003] Compared with electric motors that use electricity as the main energy source, internal combustion engines have the advantages of large load capacity and long flight time, and are widely used in large and medium-sized drones with high load requirements. There are many sources of raw materials for internal combustion engines, such as gasoline, diesel, hydrogen, etc. The internal combustion engine type engine mainly drives the output shaft to rotate through the cooperation of the piston and the piston cylinder. During this process, external air needs to enter the piston cylinder of the engine to push the piston to move to meet the working requirements of the engine.

[0004] Regarding the above-mentioned related technologies, when the UAV flies to high altitudes, external air flow velocity, direction, pressure and other factors will change with the environment, thereby affecting the engine's air intake and reducing the engine's working stability. In order to solve this problem, some UAVs currently install auxiliary equipment on the fuselage to assist the engine's air intake, such as air compressors or guide plates, but the size and weight of such auxiliary equipment are relatively large, which can easily affect the UAV's endurance and load-bearing performance. Summary of the invention

[0005] In order to improve the engine's load-to-weight ratio while meeting the engine's air intake requirements under different conditions, the present application provides a high-load-to-weight ratio gasoline engine for a UAV.

[0006] The present application provides a high load-to-weight ratio gasoline engine for a UAV, which adopts the following technical solution: A high-load-ratio gasoline engine for an unmanned aerial vehicle comprises an engine body, wherein the engine body is fixedly provided with an air intake joint and an air outlet pipe, wherein a connecting ring is fixedly provided at one end of the air intake joint away from the engine body, and a plurality of arc plates are circumferentially arranged on a side of the connecting ring away from the air intake joint, wherein the plurality of arc plates are coaxial with each other when they are at a position closest to the axis of the connecting ring, and the arc plates are slidably connected with the connecting ring in a direction approaching or away from the center of the connecting ring, and the connecting ring is provided with an adjusting member for driving the arc plates to move, and a sealing plate is provided between adjacent arc plates, the sealing plate is located on a side of the arc plate away from the axis of the connecting ring, and the sealing plate moves synchronously with the arc plate, and a pressing member is provided between the sealing plate and the arc plates, and the pressing member is used to push the sealing plate to fit together with the arc plate so that the sealing plate seals the gap between adjacent arc plates, and a pressure detector for detecting the gas pressure in the exhaust pipe is also provided in the air intake joint, and the pressure detector is electrically connected to the adjusting member for controlling the operation of the adjusting member.

[0007] By adopting the above technical solution, in the initial state, all the arc plates are close to each other and closed. At this time, the blocking plate is close to the arc plate under the compression of the clamping member. The arc plate and the blocking plate are in a gathered state, and the windward surface is relatively small, so the impact of the airflow is small. The gap between adjacent arc plates constitutes an air intake channel, and the end of the air intake channel is located away from the engine body, which makes it easier to reduce the probability of the flowing airflow affecting the internal pipelines of the drone when the engine absorbs the airflow. When the engine body is working, the outside air is sucked in through the intake joint and the pipe formed by the arc plate, and the exhaust gas is discharged from the exhaust pipe. During this process, the pressure detector continuously monitors the pressure in the intake joint. When the outside airflow is turbulent, the air intake of the exhaust pipe is insufficient. At this time, the pressure in the intake joint changes, which triggers the adjustment member, so that the adjustment member drives all the arc plates to move in the direction away from the axis of the connecting ring. When the arc plate moves, it drives the sealing plate to move, so that the sealing plate keeps sealing the gap between adjacent arc plates. After all the arc plates are away from the axis of the connecting ring, the inner diameter of the intake channel is expanded, which is beneficial to increase the air intake of the intake joint and improve the working stability of the engine body. While meeting the air intake needs of the engine body, there is no need to install heavy auxiliary devices, which is beneficial to improve the engine's load ratio.

[0008] Optionally, the adjusting member includes a power member, a driving ring and a plurality of driving rods. The driving ring is sleeved on the outside of all the arc plates and the sealing plates and is coaxially arranged with the connecting ring. The driving rod corresponds to the arc plate one by one and is located between the arc plate and the driving ring. The arc plate slides linearly with the connecting ring along the radial direction of the connecting ring. One end of the driving rod is hinged to the arc plate, and the other end is hinged to the driving ring. The driving rod is arranged along the direction of the connecting ring pointing to the arc plate, and is gradually inclined toward the arc plate. The power member is fixed to the outside of the engine body to drive the driving ring to move.

[0009] By adopting the above technical solution, under the support of the connecting ring, when the power part drives the driving ring to move along the axial direction, the driving ring drives the arc plate to move through the driving rod, and then drives all the arc plates to open and close by controlling the moving direction of the driving ring, so as to realize the control of the air supply amount of the air intake joint.

[0010] Optionally, the clamping member includes a plurality of clamping plates, a straight plate is fixedly provided in the middle position of the arc plate along the length direction, one end of the clamping plate along the length direction is fixedly connected to the straight plate, and the other end is deflected in the direction away from the straight plate toward the direction close to the arc plate, the sealing plate is radially slidably connected to the connecting ring along the connecting ring, and the sealing plate is located between the clamping plate and the arc plate, the end of the clamping plate away from the straight plate is in contact with the sealing plate, and the clamping plate is made of deformable material and is in a deformed state, a thrust is applied to the sealing plate close to the clamping plate, the sealing plate is arc-shaped, and both sides of the sealing plate along the width direction are bent in the direction close to the arc plate.

[0011] By adopting the above technical solution, the arc plate fixes and supports all the clamping plates through the straight plate, so that the clamping plate pushes the sealing plate to fit together with the arc plate. When the arc plate moves away from the axis of the connecting ring, it pushes the sealing plate to move. When the arc plate approaches the axis of the connecting ring, the sealing plate moves synchronously with the clamping plate. The arc-shaped setting of the sealing plate is beneficial to reduce the windward surface of the sealing plate and reduce the probability of the sealing plate being affected by airflow.

[0012] Optionally, sliding columns are fixedly provided at both ends of the blocking plate along the width direction, and the sliding columns are in contact with the side of the corresponding arc plate away from the axis of the connecting ring. Sealing edges corresponding to the sliding columns are fixedly connected to both sides of the arc plate along the width direction, and the sealing edges are located on the side of the arc plate away from the axis of the connecting ring. A sealing strip is fixedly provided on the side of the sealing edge close to the sliding column.

[0013] By adopting the above technical solution, when the arc plate moves, the sealing edge drives the sealing strip to move closer to or away from the corresponding sliding column. When the arc plate moves to the farthest end from the axis of the connecting ring, the sealing strip contacts the sliding column, so that the sealing edge, the sealing strip and the sliding column cooperate to seal the gap between the arc plate and the sealing plate, which is beneficial to improve the air tightness between the sealing plate and the arc plate.

[0014] Optionally, the engine body is provided with a support ring, and a connecting block is fixedly provided at one end of the arc plate away from the connecting ring, all connecting blocks are located on the inner side of the support ring, and a telescopic rod is provided between the support ring and the connecting block, one end of the telescopic rod is fixedly connected to the support ring, and the other end is fixedly connected to the connecting block, and is telescopically arranged along the axial direction.

[0015] By adopting the above technical solution, the support ring is in a positioning state. When the arc plate moves, it drives the connecting block to move, so that the connecting block drives the telescopic rod to extend and retract. The support ring limits and guides the connecting block through the telescopic rod, thereby improving the movement stability of the arc plate.

[0016] Optionally, a plurality of guide plates are provided on the side of the support ring facing away from the arc plate, and the guide plates are hinged to the support ring along a direction approaching or away from the axis of the support ring. A linkage rod is provided between the arc plate and the guide plate, and the linkage rod is hinged to the support ring. The hinge axis of the linkage rod is parallel to the hinge axis of the guide plate. One end of the linkage rod is hinged to the guide plate, and the upper end of the connecting block is rotatably connected to a rocker arm, and the end of the linkage rod away from the guide plate is hinged to the rocker arm. An elastic member is provided between the connecting block and the rocker arm, and the elastic member is used to limit the rocker arm.

[0017] By adopting the above technical scheme, the guide plate is used to guide the external airflow to flow toward the air inlet channel. In the initial state, all the arc plates are close to each other. At this time, the end of the guide plate away from the support ring is in a position close to the axis of the support ring, so that the guide plate is less affected by the external airflow. When the air intake of the air intake joint needs to be expanded, the arc plate is manipulated to move to a position away from the axis of the connecting ring. When the arc plate moves, the swing rod drives the linkage rod to rotate, so that the linkage rod drives the guide plate to rotate, so that the end of the guide plate away from the support ring rotates in a direction away from the axis of the support ring. The swing rod is connected to the connecting block through an elastic member, which is beneficial to reduce the probability of the linkage rod getting stuck when rotating, thereby guiding the airflow to flow toward the air inlet channel and improving the air intake effect of the air inlet channel.

[0018] Optionally, the blocking plate corresponds one-to-one to the arc plate, the blocking plate is connected to one side of the arc plate along the width direction and is parallel to the arc plate, between any two circumferentially adjacent arc plates, the blocking plate connected to one arc plate contacts the side of the other arc plate away from the axis of the connecting ring, the blocking plate is made of elastic material, the clamping piece includes a limit rod and a limit plate, the limit rod is located on the side of the blocking plate away from the corresponding arc plate and is fixedly connected to the blocking plate, the limit plate is located on the side of the arc plate away from the axis of the connecting ring and at the end of the arc plate along the length direction, the limit rod corresponds one-to-one to the limit plate, and an arc groove arranged along the arc line direction of the arc plate is opened on the side of the limit plate close to the limit rod, the limit rod is located in the arc groove and is slidably connected to the limit plate along the length direction of the arc groove.

[0019] By adopting the above technical solution, the blocking plate is connected to the arc plate, and when the arc plate moves, it directly drives the blocking plate to move. Initially, all the arc plates are in a state of being close to each other, and the blocking plate of any arc plate fits with another arc plate. When all the arc plates are away from each other, the blocking plate gradually deforms. At this time, the limit plate limits the limit rod through the arc groove, so that when the blocking plate and another arc plate produce relative displacement, they are always in a state of contact, so as to improve the blocking effect of the blocking plate.

[0020] Optionally, a plug plate is fixedly provided on one side of the blocking plate close to the arc plate, a slot adapted to the plug plate is opened on one side of the arc plate close to the axis of the connecting ring, the plug plate is inserted in the slot and fits with the inner wall of the slot, a clamping plate is provided on one side of the arc plate close to the axis of the connecting ring, and a plurality of clamping screws are provided on the arc plate, which pass through the arc plate plug plate in turn and are threadedly connected to the clamping plate.

[0021] By adopting the above technical solution, the clamping screw limits the clamping plate, so that the clamping plate and the arc plate cooperate to clamp and position the plug plate. The slot is used to accommodate the plug plate and the clamping plate, thereby reducing the probability of the clamping plate and the plug plate affecting the airflow in the air intake channel. By removing the clamping screw, the sealing edge can be easily replaced.

[0022] In summary, the present application includes at least one of the following beneficial technical effects: 1. In the initial state, all the arc plates are close to each other and closed. At this time, the blocking plate is close to the arc plate under the compression of the clamping member. The arc plate and the blocking plate are in a gathered state, and the windward surface is relatively small, so the impact of the airflow is small. The gap between adjacent arc plates constitutes an air intake channel, and the end of the air intake channel is located away from the engine body, which makes it easier to reduce the probability of the flowing airflow affecting the internal pipelines of the drone when the engine absorbs the airflow. When the engine body is working, the outside air is sucked in through the intake joint and the pipe formed by the arc plate, and the exhaust gas is discharged from the exhaust pipe. During this process, the pressure detector continuously monitors the pressure in the intake joint. When the outside airflow is turbulent, the intake volume of the exhaust pipe is insufficient. At this time, the pressure in the intake joint changes, which triggers the adjustment member, so that the adjustment member drives all the arc plates to move in the direction away from the axis of the connecting ring. When the arc plate moves, it drives the blocking plate to move, so that the blocking plate keeps blocking the gap between adjacent arc plates. After all the arc plates are away from the axis of the connecting ring, the inner diameter of the intake channel is expanded, which is conducive to increasing the intake volume of the intake joint and improving the working stability of the engine body. While meeting the intake demand of the engine body, there is no need to install heavy auxiliary devices, which is conducive to improving the load ratio of the engine. 2. The arc plate fixes and supports all the clamping plates through the straight plate, so that the clamping plate pushes the sealing plate to fit with the arc plate. When the arc plate moves away from the axis of the connecting ring, it pushes the sealing plate to move. When the arc plate approaches the axis of the connecting ring, the sealing plate moves synchronously with the clamping plate. The arc-shaped setting of the sealing plate is beneficial to reduce the windward surface of the sealing plate and reduce the probability of the sealing plate being affected by airflow. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of Example 1.

[0024] Figure 2 It is a schematic diagram intended to highlight the external structure of the curved plate and the blocking plate.

[0025] Figure 3 It is a schematic diagram intended to highlight the connection structure between the connecting ring and the arc plate.

[0026] Figure 4 This is a schematic diagram intended to highlight the location of the sliding struts and sealing strips.

[0027] Figure 5 It is a schematic diagram of the connection structure between the arc plate and the blocking plate in Example 2.

[0028] Explanation of the reference numerals: 1. engine body; 11. air intake connector; 111. pressure detector; 12. air outlet pipe; 2. connecting ring; 21. arc plate; 211. sealing edge; 212. sealing strip; 213. slot; 214. clamping plate; 215. clamping screw; 22. blocking plate; 221. sliding column; 222. plug plate; 231. clamping plate; 232. straight plate; 24. connecting block; 241. rocker arm; 242. elastic member; 25. tension spring; 3. adjusting member; 31. power member; 32. driving ring; 33. driving rod; 4. supporting ring; 41. telescopic rod; 42. guide plate; 43. linkage rod. DETAILED DESCRIPTION

[0029] The present application is further described in detail below in conjunction with all the accompanying drawings.

[0030] The embodiment of the present application discloses a high load-to-weight ratio gasoline engine for a UAV.

[0031] Embodiment 1: Reference Figure 1 and Figure 2 A high load-to-weight ratio gasoline engine for an unmanned aerial vehicle comprises an engine body 1. The engine body 1 is provided with an air intake joint 11 for absorbing external air and an air outlet pipe 12 for discharging exhaust gas. A connecting ring 2 is fixedly provided at one end of the air intake joint 11 away from the engine body 1, and the inner diameter of the connecting ring 2 is not less than the inner diameter of the air intake pipe.

[0032] Reference Figure 2 and Figure 3 , a plurality of arc plates 21 are provided at one end of the connecting ring 2 away from the air intake joint 11, the arc plates 21 are arranged along the axis direction of the connecting ring 2, and the position of the arc plates 21 away from the connecting ring 2 is at a position away from the engine body 1, a slider is fixedly connected to one end of the arc plates 21 close to the connecting ring 2, and a slide groove matching the slider is provided on the end surface of the connecting ring 2 close to the arc plates 21, the slider is located in the slide groove and is slidably connected to the connecting ring 2 along the length direction of the slide groove. The slide groove is arranged along the diameter direction of the connecting ring 2, and when the slider moves along the slide groove, the arc plates 21 move in the direction close to or away from the axis of the connecting ring 2.

[0033] Reference Figure 2 and Figure 3 The connecting ring 2 is provided with an adjusting member 3 for driving the arc plate 21 to move. The adjusting member 3 includes a power member 31, a driving ring 32 and a plurality of driving rods 33. The driving ring 32 is sleeved on the outside of all the arc plates 21 and is slidably connected with the connecting ring 2 along the axis direction of the connecting ring 2. The power member 31 is an electric push rod, which is fixedly connected with the connecting ring 2 and is used to push the connecting ring 2 to move. The driving rod 33 corresponds to the arc plate 21 one by one, and one end of the driving rod 33 is hinged to the arc plate 21, and the other end is hinged to the driving tube.

[0034] Reference Figure 2 and Figure 3 , the driving rod 33 points to the position of the arc plate 21 along the connecting ring 2, and gradually tilts toward the direction close to the arc plate 21. When the driving ring 32 moves away from the connecting ring 2 along the axial direction, the driving rod 33 applies a thrust to the arc plate 21 close to the axis of the connecting ring 2. In the initial state, the driving ring 32 is at the farthest distance from the connecting ring 2. At this time, all the arc plates 21 are close to each other and form a complete circular tube. When the electric push rod drives the driving ring 32 to approach the connecting ring 2, the driving ring 32 drives the arc plate 21 to move away from the axis of the connecting ring 2 through the driving rod 33.

[0035] Reference Figure 2 and Figure 3 Furthermore, a tensioning spring 25 is provided between the arc plate 21 and the connecting ring 2. One end of the tensioning spring 25 is fixedly connected to the arc plate 21, and the other end is fixedly connected to the connecting ring 2. The tensioning spring 25 is in a stretched state, thereby applying a pulling force to the arc plate 21 away from the axis of the connecting ring 2, which is beneficial to improving the convenience of driving the arc plate 21 away from the axis of the connecting ring 2.

[0036] Reference Figure 2 and Figure 3A blocking plate 22 is provided between adjacent arc plates 21. The blocking plate 22 is located on the side of the arc plate 21 away from the axis of the connecting ring 2, and the blocking plate 22 is slidably connected to the connecting ring 2 along the axis direction of the connecting ring 2. A rubber pad is fixedly provided on the side of the blocking plate 22 close to the connecting ring 2 to improve the sealing effect between the blocking plate 22 and the connecting ring 2. The arc plate 21 is provided with a clamping member for limiting the blocking plate 22. The clamping member includes a plurality of clamping plates 231. The clamping plates 231 are made of an elastic material, such as spring steel. A straight plate 232 is fixedly provided on the side of the arc plate 21 away from the axis of the connecting ring 2. The straight plate 232 is provided along the length direction of the arc plate 21. A plurality of clamping plates 214 are respectively located on both sides of the straight plate 232 along the width direction, and the clamping plates 214 are arranged along the length direction of the straight plate 232.

[0037] Reference Figure 2 and Figure 3 , the clamping plate 214 gradually tilts in the direction away from the straight plate 232 and towards the direction close to the arc plate 21, and the blocking plate 22 is located between the arc plate 21 and the clamping plate 214. At this time, the clamping plate 214 is in contact with the arc plate 21, and the clamping plate 231 is in a deformed state, thereby pushing the blocking plate 22 to fit the arc plate 21. When the arc plate 21 moves along the length direction of the slide groove, the blocking plate 22 moves with the arc plate 21 under the limiting action of the clamping plate 214 and the arc plate 21, thereby maintaining the blocking of the gap between adjacent arc plates 21.

[0038] Reference Figure 3 and Figure 4 , sliding columns 221 are provided on both sides of the blocking plate 22 along the width direction. When the blocking plate 22 moves, the sliding columns 221 are driven to move along the width direction of the arc plate 21. At this time, relative sliding occurs between the sliding columns 221 and the arc plate 21. Under the action of the sliding columns 221, a gap is formed between the blocking plate 22 and the arc plate 21. A sealing edge 211 corresponding to the sliding column 221 is fixed on the side of the arc plate 21 close to the blocking plate 22. The sealing edge 211 contacts the blocking plate 22, and a sealing strip 212 is fixed on the side of the sealing edge 211 close to the sliding column 221. The sealing strip 212 is made of a deformable material, such as rubber. When all the arc plates 21 move to the farthest distance from the axis of the connecting ring 2, the sealing edge 211 drives the sealing strip 212 to contact the sliding column 221, which is beneficial to improve the sealing effect between the arc plate 21 and the blocking plate 22. The blocking plate 22 is arc-shaped, and the bending direction of the arc-shaped plate 21 is the same as that of the arc-shaped plate 21 , which is beneficial to improve the connection stability between the arc-shaped plate 21 and the blocking plate 22 .

[0039] Reference Figure 1 and Figure 3In the initial state, all the arc plates 21 are at the closest point to the axis of the connecting ring 2. At this time, all the arc plates 21 are in contact with each other in sequence, and the gaps between all the arc plates 21 constitute an intake channel connected to the intake joint 11. When the engine body 1 is working, the external airflow passes through the connecting ring 2 along the intake channel and enters the intake joint 11. A pressure detector 111 is installed in the intake joint 11. The pressure detector 111 is electrically connected to the electric push rod, and the pressure detector 111 is provided with a detection threshold. When the flow rate of the airflow in the intake joint 11 is sufficient for the normal operation of the engine body 1, the pressure in the intake joint 11 is within the threshold range. When the airflow in the intake pipe is insufficient, the pressure in the intake joint 11 is outside the threshold range. At this time, the electric push rod triggers and drives the arc plate 21 to move away from the axis of the connecting ring 2, thereby increasing the internal diameter of the intake channel, which is conducive to increasing the flow rate of the intake joint 11 when inhaling air and improving the working stability of the engine body 1.

[0040] Reference Figure 3 and Figure 4 , initially, all the arc plates 21 and the blocking plates 22 are close to the axis of the connecting ring 2, and at this time, the arc plates 21 and the blocking plates 22 are in a converged state, which is conducive to reducing the wind resistance generated by the blocking plates 22 and the arc plates 21 at high altitudes. At the same time, the end of the air intake channel away from the connecting ring 2 is located away from the engine body 1, which is conducive to reducing the impact of the airflow on the circuits and pipelines near the engine body 1 when the air intake connector 11 absorbs the airflow. The air intake volume of the engine is automatically adjusted according to demand, and there is no need to install a large auxiliary device, which is conducive to improving the load-to-weight ratio of the engine body 1.

[0041] Reference Figure 1 and Figure 3 The engine body 1 is also provided with a support ring 4, which is located at one end of the arc plate 21 away from the connecting ring 2. The support ring 4 can be connected to the drone frame or the engine body 1, and can be specifically set according to actual needs. The support ring 4 is sleeved on the outside of all the arc plates 21, and the end of the arc plate 21 away from the connecting ring 2 is fixedly connected to the connecting block 24. The side of the connecting block 24 away from the axis of the support ring 4 is provided with a telescopic rod 41, one end of the telescopic rod 41 is fixedly connected to the connecting block 24, and the other end is fixedly connected to the support ring 4. The support ring 4 is in a positioning state. When all the arc plates 21 are opened or gathered, the support ring 4 guides the arc plates 21 through the telescopic rod 41 to improve the moving stability of the arc plates 21. Further, a tension spring 25 is also provided between the support ring 4 and the connecting block 24 to improve the force uniformity of the arc plate 21 when moving.

[0042] Reference Figure 2 and Figure 3A plurality of guide plates are provided on the side of the support ring 4 away from the arc plate 21, and all the guide plates are hinged to the support ring 4. A linkage rod 43 is provided between the guide plate and the connecting block 24, and the middle position of the linkage rod 43 is hinged to the support ring 4. The connecting block 24 is rotatably connected with a swing rod 241 corresponding to the linkage rod, and an elastic member 242 is provided between the swing rod 241 and the connecting block 24. The elastic member 242 is specifically a torsion spring, one end of the torsion spring is fixedly connected to the swing rod 241, and the other end is fixedly connected to the connecting block 24. One end of the linkage rod 43 is hinged to the swing rod 241, and the other end is hinged to the guide plate. When all the arc plates 21 are close to each other, the guide plate is parallel to the arc plate 21. When the arc plate 21 moves in the direction away from the axis of the connecting ring 2, the connecting block 24 drives the linkage rod 43 to move through the corresponding rocker rod 241. At this time, the elastic member 242 limits the rocker rod 241, so that there is a movable space between the connecting block 24 and the rocker rod 241, thereby reducing the probability of the linkage rod being stuck. The linkage rod 43 drives the guide plate to rotate, so that the end of the guide plate away from the connecting ring 2 is tilted in the direction away from the axis of the connecting ring 2. At this time, the guide plate 42 guides the airflow, so that the airflow flows to the air intake channel, which is beneficial to improve the air replenishment effect of the air intake channel on the air intake connector 11.

[0043] The implementation principle of Example 1 is as follows: arc plates 21 and sealing plates 22 are set so that all arc plates 21 cooperate with the sealing plates 22 to form an air intake channel. When the air flow in the air intake connector 11 decreases, the pressure detector 111 is triggered and drives the electric push rod to start, thereby making all arc plates 21 move away from each other, thereby expanding the inner diameter of the air intake channel and improving the air intake efficiency of the air intake connector 11, so that the engine body 1 is suitable for different working environments, and there is no need to install heavy air compressors and other mechanisms, which is beneficial to improving the load ratio of the engine body 1.

[0044] Embodiment 2: Reference Figure 5 The difference between this embodiment and the first embodiment is that the connection method between the blocking plate 22 and the arc plate 21 is different. In this embodiment, the blocking plate 22 is located on one side of the arc plate 21 along the width direction. The blocking plate 22 is fixedly connected to the side of the arc plate 21 close to the arc plate 21 with a plug plate 222. The side of the arc plate 21 close to the axis of the connecting ring 2 is provided with a clip slot 213 adapted to the plug plate 222. The plug plate 222 is located in the slot 213 and fits with the inner wall of the slot 213. The arc plate 21 limits the plug plate 222 through the slot 213, thereby limiting the displacement of the blocking plate 22 along the length direction.

[0045] Reference Figure 5The blocking plate 22 is also provided with a clamping plate 214, which is located on the side of the plug plate 222 away from the arc plate 21 and fits with the plug plate 222. The arc plate 21 is provided with a plurality of clamping screws 215, which pass through the arc plate 21 and the plug plate 222 in sequence and are threadedly connected with the clamping plate 214, and the clamping screws 215 push the clamping plate 214 to fit with the plug plate 222, so that the clamping plate 214 and the arc plate 21 cooperate to clamp and position the plug plate 222, and when the blocking plate 22 needs to be replaced, the clamping screws 215 can be directly removed.

[0046] Reference Figure 5 , the blocking plate 22 is bent along the bending direction of the arc plate 21, and then when all the arc plates 21 are close to each other, between two adjacent arc plates 21, the blocking piece of one arc plate 21 is located on the side of the other arc plate 21 away from the axis of the connecting ring 2, and the blocking piece fits with the end face of the arc plate 21 away from the axis of the connecting ring 2. The blocking piece is made of a deformable material, such as spring steel, and when the arc plate moves in a direction away from the axis of the connecting ring 2, it drives the blocking piece to gradually deform. At this time, the blocking piece has a tendency to reset and maintain fit with the arc plate. At this time, the arc plate 21 does not need an additional clamping mechanism to clamp the blocking piece, and the required connection structure is less, which makes it easy to reduce the thickness of the blocking piece and the arc plate 21, and further reduce the load.

[0047] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A high load-to-weight ratio gasoline engine for an unmanned aerial vehicle, comprising an engine body (1), the engine body (1) being provided with an air intake joint (11) and an air outlet pipe (12), characterized in that: A connecting ring (2) is fixedly provided at one end of the air intake joint (11) away from the engine body (1); a plurality of arc-shaped plates (21) are circumferentially arranged on one side of the connecting ring (2) away from the air intake joint (11); the plurality of arc-shaped plates (21) are coaxial with each other when in a position closest to the axis of the connecting ring (2); the arc-shaped plates (21) are slidably connected to the connecting ring (2) in a direction approaching or moving away from the center of the connecting ring (2); the connecting ring (2) is provided with an adjusting member (3) for driving the arc-shaped plates (21) to move; and sealing plates (22) are provided between adjacent arc-shaped plates (21); the sealing plates (22) are arranged to move the arc-shaped plates (21) and ... ) is located on a side of the arc plate (21) away from the axis of the connecting ring (2), and the blocking plate (22) moves synchronously with the arc plate (21), a pressing member is provided between the blocking plate (22) and the arc plate (21), the pressing member is used to push the blocking plate (22) and the arc plate (21) to fit together, so that the blocking plate (22) blocks the gap between adjacent arc plates (21), and a pressure detector (111) for detecting the gas pressure in the exhaust pipe is also provided in the air intake joint (11), and the pressure detector (111) is electrically connected to the regulating member (3) and is used to control the operation of the regulating member (3).

2. The high load-to-weight ratio gasoline engine for UAV according to claim 1, characterized in that: The adjusting member (3) comprises a power member (31), a driving ring (32) and a plurality of driving rods (33). The driving ring (32) is sleeved on the outside of all the arc plates (21) and the blocking plate (22) and is coaxially arranged with the connecting ring (2). The driving rods (33) correspond to the arc plates (21) one by one and are located between the arc plates (21) and the driving ring (32). The arc plates (21) slide linearly with the connecting ring (2) along the radial direction of the connecting ring (2). One end of the driving rod (33) is hinged to the arc plate (21) and the other end is hinged to the driving ring (32). The driving rod (33) is gradually tilted toward the arc plate (21) along the direction from the connecting ring (2) to the arc plate (21). The power member (31) is fixedly arranged on the outside of the engine body (1) and is used to drive the driving ring (32) to move.

3. The high load-to-weight ratio gasoline engine for UAV according to claim 1, characterized in that: The clamping member comprises a plurality of clamping plates (231), a straight plate (232) is fixedly provided at the middle position of the arc plate (21) along the length direction, one end of the clamping plate (231) along the length direction is fixedly connected to the straight plate (232), and the other end is inclined in a direction away from the straight plate (232) towards a direction close to the arc plate (21), the sealing plate (22) is slidably connected to the connecting ring (2) along the radial direction of the connecting ring (2), and the sealing plate (22) is located between the clamping plate (231) and the arc plate (21), the end of the clamping plate (231) away from the straight plate (232) is in contact with the sealing plate (22), and the clamping plate (231) is made of a deformable material and is in a deformed state, a thrust is applied to the sealing plate (22) towards the clamping plate (231), the sealing plate (22) is arc-shaped, and both sides of the sealing plate (22) along the width direction are bent towards a direction close to the arc plate (21).

4. The high load-to-weight ratio gasoline engine for UAV according to claim 3, characterized in that: Both ends of the blocking plate (22) along the width direction are fixedly provided with sliding columns (221), the sliding columns (221) are in contact with the side of the corresponding arc plate (21) away from the axis of the connecting ring (2), and both sides of the arc plate (21) along the width direction are fixedly connected with sealing edges (211) corresponding to the sliding columns (221), the sealing edges (211) are located on the side of the arc plate (21) away from the axis of the connecting ring (2), and a sealing strip (212) is fixedly provided on the side of the sealing edge (211) close to the sliding column (221).

5. The high load-to-weight ratio gasoline engine for UAV according to claim 1, characterized in that: The engine body (1) is provided with a support ring (4), a connection block (24) is fixedly provided at one end of the arc plate (21) away from the connection ring (2), all the connection blocks (24) are located inside the support ring (4), and a telescopic rod (41) is provided between the support ring (4) and the connection block (24), one end of the telescopic rod (41) is fixedly connected to the support ring (4), and the other end is fixedly connected to the connection block (24), and is telescopically arranged along the axial direction.

6. The high load-to-weight ratio gasoline engine for UAV according to claim 5, characterized in that: A plurality of guide plates (42) are provided on a side of the support ring (4) away from the arc plate (21). The guide plates (42) are hinged to the support ring (4) in a direction close to or away from the axis of the support ring (4). A linkage rod (43) is provided between the arc plate (21) and the guide plates (42). The linkage rod (43) is hinged to the support ring (4). The hinge axis of the linkage rod (43) is parallel to the hinge axis of the guide plates (42). One end of the linkage rod (43) is hinged to the guide plates (42). The upper end of the connecting block (24) is rotatably connected to a swing rod (241). The end of the linkage rod (43) away from the guide plate (42) is hinged to the swing rod (241). An elastic member (242) is provided between the connecting block (24) and the swing rod (241). The elastic member (242) is used to limit the swing rod (241).

7. The high load-to-weight ratio gasoline engine for UAV according to claim 1, characterized in that: The blocking plate (22) corresponds to the arc-shaped plate (21) one by one, and the blocking plate (22) is made of elastic material. The blocking plate (22) is connected to one side of the arc-shaped plate (21) along the width direction and is parallel to the arc-shaped plate (21). Between any two circumferentially adjacent arc-shaped plates (21), the blocking plate (22) connected to one arc-shaped plate (21) contacts the side of the other arc-shaped plate (21) that is away from the axis of the connecting ring (2).

8. The high load-to-weight ratio gasoline engine for UAV according to claim 7, characterized in that: A plug plate (222) is fixedly arranged on one side of the blocking plate (22) close to the arc plate (21); a slot (213) adapted to the plug plate (222) is provided on one side of the arc plate (21) close to the axis of the connecting ring (2); the plug plate (222) is inserted into the slot (213) and fits with the inner wall of the slot (213); a clamping plate (214) is arranged on one side of the arc plate (21) close to the axis of the connecting ring (2); the arc plate (21) is provided with a plurality of clamping screws (215); the clamping screws (215) pass through the plug plate (222) of the arc plate (21) in sequence and are threadedly connected to the clamping plate (214).

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