A drone engine with clutch and propeller stopper

Abstract

The utility model relates to the technical field of engine equipment discloses a kind of unmanned aerial vehicle engine with clutch and propeller brake stop limiting component, including crankcase and the multiple cylinder bodies fixed in the both sides of crankcase, the mounting seat is fixedly installed on the crankcase, the crankshaft is rotatably installed in the crankcase, the piston is slidably arranged in each cylinder body, the connecting rod is rotatably connected between the piston and the crankshaft, the clutch cover is rotatably connected to the one end of the crankshaft, the clutch seat is fixedly installed on the outer side of the crankshaft, two flippers are rotatably connected on the clutch seat, the tensile spring is respectively connected between the both ends of two flippers one by one, the brake disc is fixedly installed on the outer side of the clutch cover, brake assembly and limiting assembly are equipped on the mounting seat.The utility model can avoid that landing parachute rope is twisted into rotating propeller by brake stop assembly and limiting assembly, guarantee the safe recovery of unmanned aerial vehicle.

Description

Technical Field

[0001] This utility model relates to the field of engine equipment technology, specifically to a drone engine with a clutch and a propeller braking limit component. Background Technology

[0002] When a drone engine uses a clutch to drive the propeller, it automatically switches power on and off according to the engine speed. When the engine starts and gradually accelerates to a certain speed, the clutch's internal blocks are thrown outward under the action of centrifugal force. These blocks press against the inner wall of the clutch, thus achieving smooth power transmission. Conversely, when the engine speed decreases, the centrifugal force weakens, and the blocks are pulled back to their original position under the pull of the return spring, disengaging from the inner wall of the clutch, thus automatically cutting off power transmission.

[0003] When recovering drones, some drones use a parachute recovery method. When the drone reaches the designated recovery area, its parachute will deploy according to a pre-programmed procedure or under the command of the ground station, allowing the drone to land slowly. However, when using this recovery method, after the drone's clutched engine shuts down, the clutch will automatically disengage. At this time, the oncoming airflow will drive the propeller to continue rotating, which makes it very easy for the drifting parachute lines to get tangled in the rotating propeller. This can lead to the parachute lines being cut or the parachute canopy failing to deploy properly, causing the drone recovery system to fail and ultimately resulting in the drone crashing. Utility Model Content

[0004] The purpose of this invention is to provide a drone engine with a clutch and a propeller braking limit component to solve the problems mentioned above.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a drone engine with a clutch and a propeller braking limit component, comprising a crankcase and multiple cylinders fixed to both sides of the crankcase, a mounting seat fixedly installed on the crankcase, a crankshaft rotatably installed inside the crankcase, a piston slidably installed in each cylinder, a connecting rod rotatably connected between the piston and the crankshaft, a clutch cover rotatably connected to one end of the crankshaft, a clutch seat fixedly installed on the outside of the crankshaft, two swivel blocks rotatably connected to the clutch seat, tension springs respectively connecting the two ends of the two swivel blocks one-to-one, a brake disc fixedly installed on the outside of the clutch cover, and a brake assembly and a limit component provided on the mounting seat.

[0006] As a preferred embodiment of the UAV engine with clutch and propeller braking limit component described in this utility model, the braking assembly includes a brake seat fixed on a mounting base, and two slide seats are symmetrically slidably connected inside the brake seat. Brake pads facing the brake disc are fixedly installed on both slide seats.

[0007] As a preferred embodiment of the UAV engine with clutch and propeller braking limit component of this utility model, wherein: a guide rod is fixedly installed inside the brake seat, two sliders are slidably connected on the guide rod, a first connecting plate is rotatably connected between the two sliders and the two slide seats, a third spring is fixedly connected between the two sliders, and the third spring is sleeved on the outside of the guide rod.

[0008] As a preferred embodiment of the UAV engine with clutch and propeller braking limit component of this utility model, wherein: a push block is fixedly installed on one side of one of the slides, a rotating frame is rotatably connected to one end of the brake seat, and an arc-shaped triangular block and a triangular groove that slide and cooperate with each other are respectively provided at one end of the rotating frame and the push block.

[0009] As a preferred embodiment of the UAV engine with clutch and propeller braking limit component described in this utility model, wherein: a second rotating plate is rotatably provided on the mounting base, and a second connecting plate is rotatably connected between the second rotating plate and the rotating frame.

[0010] As a preferred embodiment of the UAV engine with clutch and propeller braking limit component of this utility model, the limit component includes a limit hole provided on the brake disc and a limit rod slidably connected to the mounting base. One end of the limit rod can slidably pass through the limit hole, and a push rod is slidably connected to one end of the limit rod. A second spring is fixedly connected between the push rod and the limit rod.

[0011] As a preferred embodiment of the UAV engine with clutch and propeller braking limit component described in this utility model, a rotating rod is rotatably connected to the mounting base, the end of the push rod is provided with a groove, and the outer wall of the rotating rod is slidably fitted into the groove.

[0012] As a preferred embodiment of the UAV engine with clutch and propeller braking limit component described in this utility model, wherein: a first rotating plate is rotatably provided on the mounting base, a sliding groove is provided on the first rotating plate, and a sliding rod that is slidably engaged in the sliding groove is fixedly installed on the rotating rod.

[0013] As a preferred embodiment of the UAV engine with clutch and propeller braking limit component described in this utility model, wherein: a pressure frame is fixedly installed on one side of the push rod, one end of the pressure frame slides through the rotating frame, and a first spring is fixedly connected between one end of the pressure frame and the push block, and the first spring is initially in a compressed state.

[0014] As a preferred embodiment of the UAV engine with clutch and propeller braking limit component of this utility model, wherein: a top rod is slidably mounted on the mounting base, a locking block is slidably connected to the mounting base, a third connecting plate is rotatably connected between the locking block and the top rod, a slot is provided on the outer side of the limit rod to slide with the locking block, and a fourth spring is fixedly connected between the top rod and the mounting base.

[0015] Compared with the prior art, the beneficial effects of this utility model are: This invention incorporates a braking assembly and a limiting assembly. After the engine is turned off, the braking assembly quickly stops the brake disc from rotating, thereby stopping the clutch cover and the propeller at the end from rotating. Then, the limiting assembly limits the brake disc, further preventing the propeller from rotating during gliding. This prevents the parachute rope from getting caught in the rotating propeller, ensuring the safe recovery of the drone.

[0016] This utility model's braking assembly uses two symmetrical brake pads to abut against both sides of the brake disc. The two brake pads work simultaneously, providing greater braking force, making the drone more stable and safer during emergency braking. At the same time, it can still achieve effective stopping even if one side of the brake fails, ensuring braking performance.

[0017] After the brake disc is braked by the brake assembly, the limiting assembly is then activated. The first rotating plate in the limiting assembly drives the rotating rod to rotate. The outer wall of the rotating rod then pushes the pushing rod towards the brake disc through the groove at the end of the pushing rod. The second spring pushes the limiting rod towards the brake disc, so that the limiting rod extends into the limiting hole to limit the brake disc, thereby limiting the clutch cover and the propeller, and further restricting the rotation of the propeller.

[0018] This utility model is equipped with a second spring. When the limiting assembly is activated, if the limiting rod cannot directly extend into the limiting hole, the limiting rod will abut against the side wall of the brake disc. At the same time, the limiting rod and the push rod compress the second spring. Then, after the brake assembly is released, the propeller can only rotate slowly against the wind due to friction with the limiting rod, causing the clutch cover and brake disc to rotate slowly until the limiting hole on the brake disc moves to the side of the limiting rod. At this time, the elastic force of the second spring causes the limiting rod to extend into the limiting hole, thereby completing the limiting of the limiting assembly.

[0019] This invention relates to a braking and limiting assembly that controls the sequential rotation of the second and first rotating plates at fixed time intervals. When the brake pads wear down, the rotation of the second rotating plate reduces the pressure between the brake pads and the brake disc, thus reducing friction and increasing braking time. If the limiting assembly is activated before complete braking, the limiting hole will exert a significant impact force on the limiting rod, potentially causing deformation and jamming, thus affecting equipment operation. Therefore, when the limiting assembly is activated and the push rod moves, the push rod moves the pressure frame on one side, compressing the first spring and generating a certain thrust on the push block and slide. This increases the pressure of the two brake pads on the brake disc, increasing friction and reducing braking time, ensuring effective braking. This effectively reduces the risk of jamming caused by deformation of the limiting rod during subsequent limiting of the brake disc, improving the reliability of equipment operation.

[0020] This invention incorporates a locking block to prevent the limiting rod from entering the limiting hole before the brake disc has completely stopped. The locking block limits the limiting rod's position. When the first rotating plate rotates, the push rod first moves the pressure frame, allowing the worn brake pads to bring the brake disc to a stop. At this time, the locking block compresses the second spring between the limiting rod and the push frame. When the pressure frame contacts and pushes the top rod, the top rod disengages the locking block from the slot outside the limiting rod via the third connecting plate. Then, the limiting rod springs out under the force of the second spring, ensuring that the limiting rod only contacts the brake disc after it has completely stopped, thus preventing the limiting rod from being impacted and causing the equipment to jam or be damaged.

[0021] After the brake disc is stopped by the brake pads through the pressure frame and the first spring, the first rotating plate can be rotated in the opposite direction by a small angle. At this time, the brake pads are separated from the brake disc, and the second spring makes the limiting rod still abut against the brake disc. The clutch cover and the brake disc can be moved to the side of the limiting rod by the slow rotation of the propeller facing the wind, thus completing the limiting operation. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0023] Figure 2 This is a schematic diagram of the crankshaft assembly structure of this utility model.

[0024] Figure 3 This is a schematic diagram of the first three-dimensional structure of the brake disc assembly of this utility model.

[0025] Figure 4 This is a schematic diagram of the second three-dimensional structure of the brake disc assembly of this utility model.

[0026] Figure 5 This is a first cross-sectional view of the brake disc assembly of this utility model.

[0027] Figure 6 This is a second cross-sectional view of the brake disc assembly of this utility model.

[0028] Figure 7 This is a schematic diagram of the first three-dimensional structure of the brake assembly and limit assembly of this utility model.

[0029] Figure 8 This is a schematic diagram of the second three-dimensional structure of the brake assembly and limit assembly of this utility model.

[0030] Figure 9 This is a cross-sectional view of the assembly structure of the brake component and the limiting component of this utility model.

[0031] Figure 10 This is a cross-sectional view of the assembly structure of the limiting component of this utility model.

[0032] Figure 11 This is a three-dimensional structural diagram of the rotating frame and push block assembly of this utility model.

[0033] Figure 12 for Figure 11 A magnified structural diagram at point A.

[0034] Figure 13 This is a schematic diagram of the three-dimensional structure of the limiting rod assembly of this utility model.

[0035] Figure 14 This is a schematic diagram of the three-dimensional structure of the block assembly of this utility model.

[0036] In the diagram: 1. Crankcase; 2. Cylinder block; 3. Crankshaft; 4. Clutch cover; 41. Clutch seat; 42. Thruster; 43. Tension spring; 5. Brake disc; 51. Limiting rod; 511. Limiting hole; 512. First rotating plate; 513. Rotating rod; 514. Pressure frame; 515. Push rod; 516. First spring; 517. Second spring; 52. Mounting seat; 53. Second rotating plate; 531. Second connecting plate; 54. Brake seat; 541. Brake pad; 542. Rotating frame; 543. Slide seat; 544. First connecting plate; 545. Slider; 546. Guide rod; 547. Push block; 548. Third spring; 55. Clamping block; 551. Push rod; 552. Third connecting plate; 553. Fourth spring; 6. Piston; 7. Connecting rod. Detailed Implementation

[0037] The features and exemplary embodiments of various aspects of this utility model will now be described in detail. In the following detailed description, numerous specific details are set forth in order to provide a comprehensive understanding of this utility model. However, it will be apparent to those skilled in the art that this utility model can be practiced without requiring some of these specific details. The following description of embodiments is merely intended to provide a better understanding of this utility model by illustrating examples of it. This utility model is by no means limited to any specific configuration and algorithm presented below, but covers any modifications, substitutions, and improvements to elements, components, and algorithms without departing from the spirit of this utility model. In the accompanying drawings and the following description, well-known structures and techniques are not shown in order to avoid unnecessarily obscuring this utility model.

[0038] Example 1, referring to Figure 1-14 This is the first embodiment of the present invention, which provides a drone engine with a clutch and a propeller braking limit component. The drone engine with a clutch and a propeller braking limit component includes a crankcase 1 and multiple cylinders 2 fixed on both sides of the crankcase 1. A mounting seat 52 is fixedly installed on the crankcase 1. A crankshaft 3 is rotatably installed inside the crankcase 1. A piston 6 is slidably provided in each cylinder 2. A connecting rod 7 is rotatably connected between the piston 6 and the crankshaft 3. A clutch cover 4 is rotatably connected to one end of the crankshaft 3. A clutch seat 41 is fixedly installed on the outside of the crankshaft 3. Two sling blocks 42 are rotatably connected to the clutch seat 41. Tension springs 43 are respectively connected between the two ends of the two sling blocks 42. A brake disc 5 is fixedly installed on the outside of the clutch cover 4. A brake assembly and a limit assembly are provided on the mounting seat 52.

[0039] The brake assembly includes a brake seat 54 fixed on a mounting base 52. Two slides 543 are symmetrically slidably connected inside the brake seat 54, and brake pads 541 facing the brake disc 5 are fixedly installed on both slides 543.

[0040] A guide rod 546 is fixedly installed inside the brake seat 54. Two sliders 545 are slidably connected to the guide rod 546. A first connecting plate 544 is rotatably connected between the two sliders 545 and the two slide seats 543. A third spring 548 is fixedly connected between the two sliders 545 and is sleeved on the outside of the guide rod 546.

[0041] One of the slide blocks 543 has a push block 547 fixedly installed on one side, and a rotating frame 542 is rotatably connected to one end of the brake seat 54. The rotating frame 542 and the push block 547 are respectively provided with an arc-shaped triangular block and a triangular groove that slide and cooperate with each other.

[0042] The mounting base 52 is rotatably provided with a second rotating plate 53, and a second connecting plate 531 is rotatably connected between the second rotating plate 53 and the rotating frame 542.

[0043] During use, the propeller is fixedly mounted on the clutch cover 4, and multiple pistons 6 reciprocate within multiple cylinders 2, causing multiple connecting rods 7 to transmit the power generated by fuel combustion within the cylinders 2 to the crankshaft 3, causing the crankshaft 3 to rotate continuously. During the drone startup phase, the crankshaft 3 rotates at a low speed, resulting in a low speed for the clutch seat 41. Under the tension of two tension springs 43, the two sling blocks 42 on the clutch seat 41 are positioned close to the center of the clutch seat 41, and the two sling blocks 42 separate from the inner wall of the clutch cover 4. At this time, the propeller does not rotate. As the rotational speed of crankshaft 3 gradually increases, the centrifugal force on the two swivel blocks 42 gradually increases. When the centrifugal force on the two swivel blocks 42 exceeds the tension of the two tension springs 43, the two swivel blocks 42 open outward around the connecting shaft, so that the outer sides of the two swivel blocks 42 are tightly attached to the inner wall of the clutch cover 4, so that the rotation of crankshaft 3 is transmitted to the clutch cover 4 through the two swivel blocks 42, thereby driving the clutch cover 4 to rotate, and then driving the propeller to rotate.

[0044] During flight, when it is necessary to reduce the propeller speed or stop the engine, the crankshaft 3 speed decreases, the centrifugal force on the two swivel blocks 42 gradually decreases, and under the tension of the two tension springs 43, the two swivel blocks 42 retract back to the position close to the center of the clutch seat 41, causing the two swivel blocks 42 to separate from the clutch cover 4, cutting off the power transmission, and the propeller speed gradually decreases until it stops.

[0045] When the drone is recovered via parachute, upon reaching the designated recovery area, the drone first shuts off its engine and then drives the second rotating plate 53 to rotate. This causes the second rotating plate 53 to pull the rotating frame 542 to rotate via the second connecting plate 531. As the rotating frame 542 rotates, the arc-shaped triangular block on the rotating frame 542 abuts against and slides relative to the inclined surface of the triangular groove on the push block 547, causing the push block 547 to move towards the brake disc 5. This push block 547 then pushes the fixedly connected slide block 543 towards the brake disc 5. The two first connecting plates 544 rotatably connected to this slide block 543 push the two sliders 545 to move to both sides along the guide rod 546. Simultaneously, the two sliders 545 stretch the third spring 548. One end of the two first connecting plates 544 on the other side of the two sliders 545 moves to both sides, causing the other end of the two first connecting plates 544 to drive the other slide block 543 towards the brake disc 5. The two slide blocks 543 move towards the brake disc 5, causing the two brake pads 541 to move towards the brake disc 5 respectively. The two brake pads 541 move a fixed distance, squeezing the brake disc 5. The friction between the brake pads 541 and the brake disc 5 causes the brake disc 5 to gradually stop rotating, thereby stopping the clutch cover 4 and the propeller. After the second rotating plate 53 drives the rotation, a certain time interval is elapsed before the limit component is activated, limiting the brake disc 5, thereby limiting the clutch cover 4 and the propeller. Then, the parachute equipped on the UAV opens according to a predetermined program or under the command of the ground station, allowing the UAV to land slowly. By stopping and limiting the brake disc 5, clutch cover 4, and propeller, the parachute ropes can be prevented from getting caught in the propeller during deployment, ensuring the safe recovery of the UAV.

[0046] When the brake assembly is released, the second rotating plate 53 is driven to rotate in the opposite direction, causing the second connecting plate 531 to push the rotating frame 542 to rotate in the opposite direction. At this time, the stretched third spring 548 releases its elastic force, pulling the two sliders 545 to move towards the middle of the guide rod 546. This, through the two sets of first connecting plates 544, pushes the two slide blocks 543 to move away from the brake disc 5, thereby causing the two brake pads 541 to move away from the brake disc 5 to release the brake. One of the slide blocks 543 drives the push block 547 to move away from the brake disc 5, so that the triangular groove on the push block 547 and the triangular block on the rotating frame 542 slide back to the initial engagement position, thereby achieving reset and facilitating use for the next braking.

[0047] By having two symmetrical brake pads 541 abut against both sides of the brake disc 5, the two brake pads 541 squeeze and rub simultaneously, which can provide greater frictional braking resistance to the brake disc 5, making the drone more stable and safer during emergency braking. At the same time, it can still achieve effective stopping when one side of the brake pad 541 fails, ensuring braking effect.

[0048] Example 2, refer to Figure 3-12 This is the second embodiment of the present invention, which differs from the first embodiment in that: The limiting assembly includes a limiting hole 511 provided on the brake disc 5 and a limiting rod 51 slidably connected to the mounting base 52. One end of the limiting rod 51 can slide through the limiting hole 511, and a push rod 515 is slidably connected to one end of the limiting rod 51. A second spring 517 is fixedly connected between the push rod 515 and the limiting rod 51.

[0049] A rotating rod 513 is rotatably connected to the mounting base 52. The end of the push rod 515 is provided with a groove, and the outer wall of the rotating rod 513 slides within the groove.

[0050] The mounting base 52 is provided with a first rotating plate 512, which is provided with a sliding groove. A sliding rod that is slidably fitted in the sliding groove is fixedly installed on the rotating rod 513.

[0051] During use, after the second rotating plate 53 is driven to rotate, the control system controls the limit component to start after a certain interval, that is, drives the first rotating plate 512 to rotate. The slide groove on the first rotating plate 512 pushes the slide rod on the rotating rod 513 to make the rotating rod 513 rotate on the mounting base 52. The outer wall of the rotating rod 513 then moves the pushing rod 515 toward the brake disc 5 through the groove on the pushing rod 515. This causes the second spring 517 to push the limit rod 51 toward the brake disc 5, so that the end of the limit rod 51 extends into the limit hole 511 to limit the brake disc 5, thereby limiting the clutch cover 4 and the propeller. If the limiting rod 51 moves toward the brake disc 5 and cannot directly extend into the limiting hole 511, the end of the limiting rod 51 will abut against the side wall of the brake disc 5. At the same time, the limiting rod 51 and the push rod 515 will compress the second spring 517. After the brake assembly is released, the propeller will rotate in the wind. However, due to the frictional contact between the brake disc 5 and the end of the limiting rod 51, the propeller can only rotate slowly, which causes the clutch cover 4 and the brake disc 5 to rotate slowly until the limiting hole 511 on the brake disc 5 moves to the side of the end of the limiting rod 51. At this time, the elastic force of the second spring 517 causes the limiting rod 51 to automatically extend into the limiting hole 511, thereby completing the limiting of the limiting assembly.

[0052] The remaining structure is the same as that in Example 1.

[0053] Example 3, referring to Figure 3-12 This is the second embodiment of the present invention, which differs from the first embodiment in that: A pressure frame 514 is fixedly installed on one side of the push rod 515. One end of the pressure frame 514 slides through the rotating frame 542. A first spring 516 is fixedly connected between one end of the pressure frame 514 and the push block 547. The first spring 516 is initially in a compressed state.

[0054] A push rod 551 is slidably mounted on the mounting base 52. A locking block 55 is slidably connected to the mounting base 52. A third connecting plate 552 is rotatably connected between the locking block 55 and the push rod 551. A slot is provided on the outer side of the limiting rod 51 to slide with the locking block 55. A fourth spring 553 is fixedly connected between the push rod 551 and the mounting base 52.

[0055] During operation, the braking assembly and the limiting assembly are controlled by the control system to rotate the second rotating plate 53 and the first rotating plate 512 sequentially at fixed time intervals. If the brake pad 541 wears, the rotation of the second rotating plate 53 causes the brake pad 541 to move a set distance, reducing the pressure of the brake pad 541 on the brake disc 5. This reduces the friction between the brake pad 541 and the brake disc 5, thus increasing the braking time of the brake disc 5. When driving the first rotating plate 512 to rotate, if the brake disc 5 does not stop completely, and the limiting rod 51 inserts into the limiting hole 511, the limiting hole 511 will exert a large impact force on the limiting rod 51, causing the limiting rod 51 to deform and potentially jamming the equipment, affecting its use. Therefore, when driving the first rotating plate 512 to rotate... When the device is activated, the push rod 515 will first drive the pressure frame 514 to move. At this time, the locking block 55 is engaged in the locking groove on the outside of the limiting rod 51, so that the limiting rod 51 does not move. The movement of the pressure frame 514 causes the pressure frame 514 to compress the first spring 516, and the first spring 516 applies a certain pushing force to the push block 547 and the slide block 543, so that the worn brake pads 541 can continue to move, thereby compensating for the wear of the brake pads 541. This increases the pressure of the two brake pads 541 on the brake disc 5, thereby increasing the friction between the two brake pads 541 and the brake disc 5, so that the brake disc 5 can stop quickly. This effectively reduces the possibility of the limiting rod 51 deforming and jamming when the brake disc 5 is re-limited, thus improving the reliability of the equipment operation. Then, as the push rod 515 moves, the limit rod 51 is limited by the locking block 55, causing the push rod 515 and the limit rod to compress the second spring 517. The movement of the pressure frame 514 compensates for the wear of the brake pad 541, causing the brake disc 5 to stop. When the pressure frame 514 moves a set distance, the pressure frame 514 pushes the top rod 551 to move, causing the top rod 551 to push one end of the third connecting plate 552 to move, while compressing the fourth spring 553, causing the other end of the third connecting plate 552 to push the locking block 55 to slide on one side of the mounting base 52, causing the locking block 55 to disengage from the slot outside the limit rod 51. Under the elastic force of the second spring 517, the limit rod 51 automatically pops out and inserts into the limit hole 511 on the brake disc 5. This ensures that the limit rod 51 will only contact the brake disc 5 after the brake disc 5 has completely stopped, preventing the limit rod 51 from being impacted and causing the equipment to jam and be damaged.

[0056] If the limiting rod 51 fails to directly extend into the limiting hole 511 when the second spring 517 automatically pops out, the end of the limiting rod 51 will abut against the side wall of the brake disc 5. At the same time, the second spring 517 still has some elastic force, which drives the second rotating plate 53 to rotate in the opposite direction, causing the brake assembly to rotate. Then, the first rotating plate 512 is driven to rotate in the opposite direction by a small angle. The elastic force of the first spring 516 causes the pressure bracket 514 to move away from the brake disc 5. The decrease in the elastic force of the first spring 516 allows the elastic force of the third spring 548 to push it. The two sliders 545 move to the sides, thereby separating the two brake pads 541 from the brake disc 5. The elastic force of the second spring 517 causes the limiting rod 51 to abut against the brake disc 5. The frictional contact between the brake disc 5 and the end of the limiting rod 51 causes the propeller to rotate slowly when facing the wind, thereby causing the clutch cover 4 and the brake disc 5 to rotate slowly until the limiting hole 511 on the brake disc 5 moves to one side of the end of the limiting rod 51. At this time, the remaining elastic force of the second spring 517 causes the limiting rod 51 to automatically extend into the limiting hole 511, completing the limiting operation.

[0057] After both the second rotating plate 53 and the first rotating plate 512 have rotated and reset, the elastic force of the first spring 516 causes the pressure frame 514 to drive the push rod 515 to move away from the brake disc 5, which causes the second spring 517 to pull the limiting rod 51 to move away from the brake disc 5 until the slot on the limiting rod 51 moves to the side of the locking block 55. This causes the elastic force of the fourth spring 553 to push the top rod 551 to move, thereby causing the third connecting rod plate 552 to pull the locking block 55 into the slot on the outside of the limiting rod 51, thus resetting the limiting rod 51 for future use.

[0058] The remaining structure is the same as that in Example 2.

[0059] Different technical features appearing in different embodiments can be combined to achieve beneficial effects. Those skilled in the art, based on a study of the drawings, specification, and claims, should be able to understand and implement other variations of the disclosed embodiments. In the claims, the term "comprising" does not exclude other means or steps; the indefinite article "a" does not exclude a plurality; the terms "first" and "second" are used to identify names rather than to indicate any particular order. No reference numerals in the claims should be construed as limiting the scope of protection. The functionality of multiple parts appearing in the claims can be implemented by a single hardware or software module. The appearance of certain technical features in different dependent claims does not mean that these technical features cannot be combined to achieve beneficial effects.

Claims

1. A drone engine with a clutch and a propeller braking limit component, characterized in that: The system includes a crankcase (1) and multiple cylinder blocks (2) fixed on both sides of the crankcase (1). A mounting base (52) is fixedly installed on the crankcase (1). A crankshaft (3) is rotatably installed inside the crankcase (1). A piston (6) is slidably provided in each cylinder block (2). A connecting rod (7) is rotatably connected between the piston (6) and the crankshaft (3). A clutch cover (4) is rotatably connected to one end of the crankshaft (3). A clutch seat (41) is fixedly installed on the outside of the crankshaft (3). Two sling blocks (42) are rotatably connected to the clutch seat (41). Tension springs (43) are respectively connected between the two ends of the two sling blocks (42). A brake disc (5) is fixedly installed on the outside of the clutch cover (4). A brake assembly and a limit assembly are provided on the mounting base (52).

2. The UAV engine with clutch and propeller braking limit component according to claim 1, characterized in that: The brake assembly includes a brake seat (54) fixed on a mounting base (52), and two slides (543) are symmetrically slidably connected inside the brake seat (54). Each of the two slides (543) has a brake pad (541) fixedly mounted on it facing the brake disc (5).

3. The UAV engine with clutch and propeller braking limit component according to claim 2, characterized in that: A guide rod (546) is fixedly installed inside the brake seat (54). Two sliders (545) are slidably connected on the guide rod (546). A first connecting plate (544) is rotatably connected between the two sliders (545) and the two slide seats (543). A third spring (548) is fixedly connected between the two sliders (545). The third spring (548) is sleeved on the outside of the guide rod (546).

4. A UAV engine with a clutch and a propeller braking limit component according to claim 3, characterized in that: One of the slides (543) has a push block (547) fixedly installed on one side, and a rotating frame (542) is rotatably connected to one end of the brake seat (54). The rotating frame (542) and the push block (547) are respectively provided with an arc-shaped triangular block and a triangular groove that slide and cooperate with each other.

5. A UAV engine with a clutch and a propeller braking limit component according to claim 4, characterized in that: The mounting base (52) is rotatably provided with a second rotating plate (53), and a second connecting plate (531) is rotatably connected between the second rotating plate (53) and the rotating frame (542).

6. A UAV engine with a clutch and a propeller braking limit component according to claim 4, characterized in that: The limiting component includes a limiting hole (511) disposed on the brake disc (5) and a limiting rod (51) slidably connected to the mounting base (52). One end of the limiting rod (51) can slide through the limiting hole (511), and a push rod (515) is slidably connected to one end of the limiting rod (51). A second spring (517) is fixedly connected between the push rod (515) and the limiting rod (51).

7. A UAV engine with a clutch and a propeller braking limit component according to claim 6, characterized in that: A rotating rod (513) is rotatably connected to the mounting base (52). The end of the push rod (515) is provided with a groove, and the outer wall of the rotating rod (513) slides within the groove.

8. A UAV engine with a clutch and a propeller braking limit component according to claim 7, characterized in that: The mounting base (52) is rotatably provided with a first rotating plate (512), the first rotating plate (512) is provided with a sliding groove, and the rotating rod (513) is fixedly installed with a sliding rod that slides in the sliding groove.

9. A UAV engine with a clutch and a propeller braking limit component according to claim 7, characterized in that: A pressure frame (514) is fixedly installed on one side of the push rod (515). One end of the pressure frame (514) slides through the rotating frame (542). A first spring (516) is fixedly connected between one end of the pressure frame (514) and the push block (547). The first spring (516) is initially in a compressed state.

10. A UAV engine with a clutch and a propeller braking limit component according to claim 9, characterized in that: A top rod (551) is slidably mounted on the mounting base (52), a locking block (55) is slidably connected on the mounting base (52), a third connecting plate (552) is rotatably connected between the locking block (55) and the top rod (551), a locking groove is provided on the outside of the limiting rod (51) to slide with the locking block (55), and a fourth spring (553) is fixedly connected between the top rod (551) and the mounting base (52).

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