Piston engine braking device of unmanned aerial vehicle

Abstract

The invention relates to the technical field of unmanned aerial vehicles, in particular to an unmanned aerial vehicle piston engine braking device which comprises a braking device body, and the braking device body comprises a power source; the bearing bracket is detachably connected with the power source; and the brake part penetrates through the bearing support and is provided with a follow-up unit matched with the power source, and the power source can drive the follow-up unit to move so that the brake part can directionally move relative to the bearing support. When the unmanned aerial vehicle is landed by opening a parachute or colliding with a net and a rope, landing failure caused by winding and cutting off a parachute rope or a net rope by a windmill effect or an inertia high-speed rotating propeller is prevented, and potential safety hazards to personnel and the unmanned aerial vehicle caused by collision and disassembly of the high-speed rotating propeller are prevented; aiming at the condition that the engine of the unmanned aerial vehicle is out of control during flight or ground work, the unmanned aerial vehicle can be braked to lose power to land or stop working, additional loss caused by out-of-control flight of the unmanned aerial vehicle is prevented, and the safety of personnel and the unmanned aerial vehicle is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of unmanned aerial vehicles, in particular to a piston engine braking device for an unmanned aerial vehicle. Background Art

[0002] At present, small and medium-sized UAVs widely use aviation piston engines as their power core. However, after the engine is turned off, the output shaft often continues to rotate at high speed due to the rotational inertia and the "windmill effect" caused by the propeller continuing to rotate in the air, which may interfere with the operation of other systems of the UAV. Therefore, it is particularly important to ensure that the engine can stop running quickly after the engine is turned off. In addition, in the face of an emergency situation where the UAV or engine is out of control, taking quick and effective measures to stop the engine in an emergency is a key link to ensure flight safety. Unfortunately, although the existing aviation piston engines have conventional starting, flameout and valve control functions, they generally lack a direct emergency braking mechanism. The common method in the industry is to close the valve by controlling the engine's valve system, trying to use the compressed gas in the cylinder to do work to slow down or stop the engine rotation. However, the effect of this braking measure is not significant, especially in the situation where the engine is completely out of control, there is a lack of effective emergency braking means. Summary of the invention

[0003] The object of the present invention is to provide a brake device for a piston engine of an unmanned aerial vehicle to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above object, the present invention provides the following technical solutions: A brake device for a piston engine of an unmanned aerial vehicle comprises a brake device body, wherein the brake device body comprises: Power source; A bearing bracket, detachably connected to the power source; The brake member passes through the bearing bracket and is formed with a follower unit adapted to the power source. The power source can drive the follower unit to move so that the brake member moves in a directional manner relative to the bearing bracket.

[0005] The unmanned aerial vehicle piston engine brake device as described above: the brake member includes a shaft rod and a brake pad; A mounting plate is formed at one end of the shaft rod, and the brake pad is attached to the mounting plate and can be clamped and fixed by a pressure plate.

[0006] The unmanned aerial vehicle piston engine brake device as described above: the brake member includes a shaft and a brake pad connected to the shaft; The shaft rod comprises a sleeve rod and a columnar connecting piece, one end of the sleeve rod is in a conductive shape, one end of the columnar connecting piece is inserted into the sleeve rod and connected with a spring, and the other end is fixed with a mounting plate, the brake pad is attached to the mounting plate and can be fixed by pressing the pressure plate; A convex column is formed on the columnar connecting member, and the convex column is placed in a guide slot formed on the inner side of the sleeve rod and can move relative to the guide slot.

[0007] The unmanned aerial vehicle piston engine braking device as described above: the guide groove includes a first groove body parallel to the axial direction of the sleeve rod and a second groove body spirally arranged along the inner side of the sleeve rod, and the first groove body is connected to the second groove body.

[0008] The unmanned aerial vehicle piston engine brake device as described above: the columnar connecting member includes a movable column and a connecting rod; The movable column is arranged on the inner side of the sleeve rod, the convex column is fixed on the movable column, and a fixed column is fixed on one end of the movable column facing the connecting rod; One end of the connecting rod is fixed to the mounting plate, and the other end is formed with an embedded hole, the fixing column is inserted into the embedded hole, and is fixed to a sliding sleeve that is slidably mounted on the outside of the connecting rod; The outer side of the connecting rod is also threadedly connected with a threaded sleeve, and the threaded sleeve is rotatably connected to the sliding sleeve.

[0009] The unmanned aerial vehicle piston engine braking device as described above: the power source includes a steering gear, and the steering gear is formed with an output end connected to the follower unit.

[0010] The unmanned aerial vehicle piston engine braking device as described above: the steering gear is also equipped with a steering gear bracket, and the steering gear bracket is used to install the steering gear on the piston engine.

[0011] The unmanned aerial vehicle piston engine braking device as described above: the follower unit includes a rocker arm, one end of which is fixed to the output end of the servo, and the other end is equipped with a connecting shaft, which is inserted into a mounting hole on the shaft rod away from one end of the mounting plate and is gap-matched with the mounting hole.

[0012] The unmanned aerial vehicle piston engine braking device as described above: the bearing bracket is formed with a through hole for the shaft rod to pass through, and a radial bearing is installed in the through hole.

[0013] The unmanned aerial vehicle piston engine braking device as described above: the power source includes a linear push-pull electromagnet installed on the bearing bracket, and the follower unit includes a permanent magnet fixed to the end of the shaft away from the mounting plate.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The present invention aims to prevent the windmill effect or the inertia of the high-speed rotating propeller from winding and cutting the parachute rope or net rope to cause landing failure when the drone opens the parachute to land or hits the net or rope to land, and prevents the high-speed rotating propeller from colliding and disintegrating to bring safety hazards to personnel and drones; In response to the situation where the UAV engine loses control during flight or ground operation, the present invention can use the brake to make the UAV lose power and land or stop working, thereby preventing the UAV from losing control and causing additional losses, and ensuring the safety of personnel and the UAV. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a structural explosion diagram of the unmanned aerial vehicle piston engine braking device.

[0016] Figure 2 The figure is a schematic diagram of the structure of the piston engine braking device of an unmanned aerial vehicle.

[0017] Figure 3 The figure is a schematic diagram of the installation state of the unmanned aerial vehicle piston engine braking device applied to the piston engine.

[0018] Figure 4 This is a schematic diagram of the connection between the shaft rod and the brake pad in another embodiment of the unmanned aerial vehicle piston engine brake device.

[0019] Figure 5 It is a front view of the connection state of the shaft rod and the brake pad in another embodiment of the unmanned aerial vehicle piston engine brake device.

[0020] Figure 6 This is an exploded view of the structure of the shaft rod and brake pad in another embodiment of the unmanned aerial vehicle piston engine brake device.

[0021] Figure 7 This is an exploded view of the structure of the shaft rod and the brake pad at another angle in another embodiment of the unmanned aerial vehicle piston engine brake device.

[0022] Figure 8 The figure is a schematic diagram of the structure of a sleeve rod in another embodiment of a piston engine brake device for an unmanned aerial vehicle.

[0023] In the figure: 11-brake device body, 22-piston engine, 221-rotating part, 1-brake pad, 2-servo, 3-rocker arm, 4-axle rod, 401-mounting hole, 402-mounting plate, 403-sleeve rod, 404-connecting rod, 405-sliding sleeve, 406-threaded sleeve, 407-strip groove, 408-spring, 409-movable column, 410-convex column, 411-guide column, 412-fixed column, 413-connecting plate, 414-external thread, 415-embedded hole, 416-guide hole, 417-guide slide groove, 5-radial bearing, 6-bearing bracket, 7-servo bracket, 8-pressure plate, 9-top screw. DETAILED DESCRIPTION

[0024] Various exemplary embodiments, features and aspects of the present application will be described in detail below with reference to the accompanying drawings. The same reference numerals in the accompanying drawings represent elements with the same or similar functions. Although various aspects of the embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless otherwise specified.

[0025] The word “exemplary” is used exclusively herein to mean “serving as an example, example, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0026] In addition, in order to better illustrate the present application, numerous specific details are provided in the specific embodiments below. It should be understood by those skilled in the art that the present application can also be implemented without certain specific details. In some examples, methods, means, and elements well known to those skilled in the art are not described in detail in order to highlight the subject matter of the present application.

[0027] The present invention aims to provide a braking device, which is applied to a piston engine 22 to achieve braking of a rotating component 221 of the piston engine 22, thereby solving the problem of rapid braking of a high-speed rotating propeller of the piston engine 22. The specific implementation method is as follows: See also Figure 1-Figure 3 In an embodiment of the present invention, an unmanned aerial vehicle piston engine braking device is installed on a piston engine 22. A rotating component 221 on the piston engine 22 can be braked by the unmanned aerial vehicle piston engine braking device, and specifically includes a braking device body 11. The braking device body 11 includes a power source, a bearing bracket 6 and a brake member. The bearing bracket 6 is detachably connected to the power source; the brake member passes through the bearing bracket 6 and is formed with a follower unit adapted to the power source. The power source can drive the follower unit to move so that the brake member moves in a directional manner relative to the bearing bracket 6.

[0028] In this embodiment, when braking is required, the power source works in conjunction with the follower unit to drive the brake member to move, and the brake member abuts against the rotating member 221 to achieve friction braking.

[0029] The present invention aims to optimize the landing process of the drone, especially to address the challenges commonly encountered in traditional landing methods such as opening the parachute, hitting the net and hitting the rope, and to prevent the entanglement and breakage of the parachute rope and the net rope that may be caused by the windmill effect or the high-speed rotation of the propeller inertia, thereby significantly reducing the risk of landing failure. At the same time, the present invention also aims to enhance the safety performance of the drone, effectively prevent the high-speed rotating propeller from disintegrating under accidental collisions, and greatly reduce the potential threats to personnel and the drone itself. In addition, in response to the engine out-of-control emergency situation that the drone may encounter during flight operations or ground operations, the present invention can quickly cut off the power source of the drone in an emergency, ensuring that the drone can safely slow down, land or stop working, effectively curbing further damage that may be caused by out-of-control flight or continuous operation. The present invention improves the safety of drone operations and provides a solid guarantee for personnel safety and the integrity of the drone.

[0030] Further, in one embodiment, the brake member includes a shaft 4 and a brake pad 1; One end of the shaft 4 is provided with a mounting plate 402, and the brake pad 1 is attached to the mounting plate 402 and fixed by the pressing plate 8. The specific fixing method includes but is not limited to fixing with bolts and nuts, thereby effectively ensuring the stability of the brake pad after installation and facilitating disassembly and replacement.

[0031] In this embodiment, the brake pad 1 can be made of rubber, metal friction material or composite friction material, which can be selected according to actual needs, and this embodiment does not make any specific restrictions on this.

[0032] In another embodiment, please refer to Figure 4-Figure 8 The brake member includes a shaft rod 4 and a brake pad 1 connected to the shaft rod 4; the shaft rod 4 includes a sleeve rod 403 and a columnar connector, one end of the sleeve rod 403 is a conducting end, a spring 408 is arranged in the conducting end of the sleeve rod 403, one end of the columnar connector is inserted into the conducting end of the sleeve rod 403 and connected to the spring 408, and a mounting plate 402 is fixed to the other end of the columnar connector, the brake pad 1 is attached to the mounting plate 402 and is fixed by the pressing plate 8; a boss 410 is arranged on the columnar connector, the boss 410 is placed in a guide slot 417 on the inner wall of the sleeve rod 403, and can move in the guide slot 417. Among them, the guide slot 417 includes a first slot body parallel to the axial direction of the sleeve rod 403 and a second slot body spirally arranged along the inner wall of the sleeve rod 403, and the first slot body is connected to the second slot body.

[0033] In this embodiment, in the initial state, the length direction of the brake pad 1 is parallel to the tangential direction of the rotating component 221. When the shaft rod 4 moves toward the rotating component 221, the brake pad 1 abuts against the rotating component 221 to provide a certain friction force. At the same time, after the brake pad 1 abuts against the rotating component 221, the sleeve rod 403 continues to move in the direction of the rotating component 221. At this time, the spring 408 is gradually compressed, and when the boss 410 moves from the first slot body to the second slot body, the brake pad 1 begins to rotate under the action of the columnar connecting member and the mounting plate 402 until the length direction of the brake pad 1 is perpendicular to the axial direction of the rotating component 221. During the movement of the sleeve rod 403, the extrusion pressure between the brake pad 1 and the rotating component 221 gradually increases, so as to gradually decelerate the rotating component 221, so as to eliminate the problem of severe wear of the brake pad 1 caused by direct and large force contact. At the same time, when the brake pad 1 rotates, the contact area between the brake pad 1 and the rotating component 221 in the rotation direction can be increased to improve the braking effect.

[0034] The above-mentioned columnar connecting member includes a movable column 409 and a connecting rod 404; the movable column 409 is arranged in the sleeve rod 403, the convex column 410 is fixed on the movable column 409, and a fixed column 412 is fixed to one end of the movable column 409 facing the connecting rod 404; one end of the connecting rod 404 is fixed to the mounting plate 402, and the other end is formed with an embedded hole 415, the fixed column 412 is inserted into the embedded hole 415, and is fixed to the sliding sleeve 405 slidingly arranged on the outside of the connecting rod 404; the outer side of the connecting rod 404 is also threadedly connected with a threaded sleeve 406, and the threaded sleeve 406 is rotatably connected to the sliding sleeve 405.

[0035] It should be noted that an external thread 414 is provided on the outer side of the connecting rod 404 , and the threaded sleeve 406 is threadedly connected to the external thread 414 , so that when the threaded sleeve 406 is rotated, the sliding sleeve 405 can be driven to move along the axial direction of the connecting rod 404 .

[0036] Specifically, when the brake pad 1 is worn, the squeezing pressure between the brake pad 1 and the rotating component 221 becomes smaller, affecting the braking effect of the rotating component 221. The sliding sleeve 405 is driven to move toward the movable column 409 by rotating the threaded sleeve 406, thereby driving the fixed column 412 to move to change the distance between the movable column 409 and the connecting rod 404. In other words, the length adjustment of the columnar connecting part is realized to eliminate the disadvantages caused by the wear of the brake pad 1.

[0037] Furthermore, at least four guide posts 411 are fixed to one end of the movable post 409 facing the connecting rod 404 , and the guide posts 411 are inserted into guide holes 416 formed on the connecting rod 404 to achieve the purpose that the movable post 409 can only move axially along the connecting shaft 404 .

[0038] A plurality of strip-shaped through grooves 407 are formed circumferentially on the connecting rod 404. The sliding sleeve 405 is fixedly connected to the fixing column 412 via a plurality of connecting plates 413. The connecting plates 413 slide in the strip-shaped through grooves 407. The length of the connecting plates 413 (a side parallel to the axial direction of the connecting rod 404) is smaller than the length of the strip-shaped through grooves 407.

[0039] Exemplarily, in one embodiment, the power source includes a linear push-pull electromagnet mounted on the bearing bracket 6, and the follower unit includes a permanent magnet fixed to the end of the shaft 4 away from the mounting plate 402. By controlling the magnetic pole change of the linear push-pull electromagnet, the permanent magnet is attracted or repelled, thereby driving the shaft 4 and the brake pad 1 to move toward the rotating component 221 or away from the rotating component 221, thereby achieving contact or separation between the brake pad 1 and the rotating component 221, forming a friction braking effect or maintaining a non-braking state.

[0040] Exemplarily, in one embodiment, the power source includes a servo 2, which has an output end connected to the follower unit, wherein the follower unit includes a rocker arm 3, one end of the rocker arm 3 is fixed to the output end of the servo 2, and the other end is equipped with a connecting shaft, which is inserted into a mounting hole 401 on the shaft rod 4 away from the mounting plate 402, and is loosely matched with the mounting hole 401.

[0041] When the servo 2 is working, it drives the rocker arm 3 to rotate slightly. When the rocker arm 3 rotates, the shaft rod 4 is driven to move through the connecting shaft, thereby driving the brake pad 1 to move toward the rotating component 221 or away from the rotating component 221, so that the brake pad 1 is in contact with or separated from the rotating component 221, forming a friction braking effect or maintaining a non-braking state.

[0042] It should be noted that, due to the clearance fit between the mounting hole 401 and the connecting shaft, the connecting shaft can move slightly radially along the mounting hole 401 in the mounting hole 401. Therefore, when the swing arm 3 rotates, the shaft rod 4 can move vertically relative to the bearing bracket 6 to achieve directional movement of the brake pad 1.

[0043] Furthermore, a through hole is formed on the bearing bracket 6 for the shaft rod 4 to pass through, and a radial bearing 5 is installed in the through hole. Preferably, the radial bearing 5 is fixed in the through hole by a top screw 9. The radial bearing 5 can reduce the friction of the shaft rod 4 moving relative to the bearing bracket 6.

[0044] A steering gear bracket 7 is also installed on the steering gear 2 , and the steering gear bracket 7 is used to install the steering gear 2 on the piston engine 22 .

[0045] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates. In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A brake device for an unmanned aerial vehicle piston engine, comprising a brake device body (11), characterized in that: The braking device body (11) comprises: Power source; A bearing bracket (6) detachably connected to the power source; a brake member, which passes through the bearing bracket (6) and is formed with a follower unit adapted to the power source, wherein the power source can drive the follower unit to move so as to cause the brake member to move in a directional manner relative to the bearing bracket (6); The brake component comprises a shaft (4) and a brake pad (1) connected to the shaft (4); The shaft rod (4) includes a sleeve rod (403) and a columnar connecting member, one end of the sleeve rod (403) is a conducting end, a spring (408) is provided in the conducting end of the sleeve rod (403), one end of the columnar connecting member is inserted into the conducting end of the sleeve rod (403) and connected to the spring (408), and the other end of the columnar connecting member is fixed with a mounting plate (402), and the brake pad (1) is attached to the mounting plate (402) and is fixed by a pressing plate (8); The columnar connecting member is provided with a boss (410), and the boss (410) is placed in a guide slot (417) on the inner wall of the sleeve rod (403) and is capable of moving in the guide slot (417); The guide slot (417) comprises a first slot body axially parallel to the sleeve rod (403) and a second slot body spirally arranged along the inner wall of the sleeve rod (403), wherein the first slot body is in communication with the second slot body.

2. The unmanned aerial vehicle piston engine braking device according to claim 1, characterized in that: The brake component comprises a shaft (4) and a brake pad (1); A mounting plate (402) is provided at one end of the shaft (4), and the brake pad (1) is fitted onto the mounting plate (402) and is pressed and fixed by a pressure plate (8).

3. The unmanned aerial vehicle piston engine braking device according to claim 1, characterized in that: The columnar connecting member includes a movable column (409) and a connecting rod (404); The movable column (409) is arranged in the sleeve rod (403), the protruding column (410) is fixed on the movable column (409), and a fixed column (412) is fixed to one end of the movable column (409) facing the connecting rod (404); One end of the connecting rod (404) is fixed to the mounting plate (402), and the other end is formed with an embedded hole (415), the fixing column (412) is inserted into the embedded hole (415), and is fixed to the sliding sleeve (405) that is slidably mounted on the outside of the connecting rod (404); The outer side of the connecting rod (404) is also threadedly connected to a threaded sleeve (406), and the threaded sleeve (406) is rotatably connected to the sliding sleeve (405).

4. The unmanned aerial vehicle piston engine braking device according to claim 3, characterized in that: A plurality of strip-shaped through grooves (407) are formed on the connecting rod (404) along the circumferential direction. The sliding sleeve (405) is fixedly connected to the fixed column (412) via a plurality of connecting pieces (413). The connecting pieces (413) slide in the strip-shaped through grooves (407), and the length of the connecting pieces (413) is less than the length of the strip-shaped through grooves (407).

5. The unmanned aerial vehicle piston engine braking device according to claim 3, characterized in that: The power source comprises a steering gear (2), and the steering gear (2) is provided with an output end connected to the follower unit.

6. The unmanned aerial vehicle piston engine braking device according to claim 5, characterized in that: A steering gear bracket (7) is also installed on the steering gear (2), and the steering gear bracket (7) installs the steering gear (2) on the piston engine (22).

7. The unmanned aerial vehicle piston engine braking device according to claim 5, characterized in that: The follower unit comprises a rocker arm (3), one end of the rocker arm (3) is fixed to the output end of the servo (2), and the other end is provided with a connecting shaft, the connecting shaft being inserted into a mounting hole (401) on the shaft rod (4) at one end away from the mounting plate (402) and having a clearance fit with the mounting hole (401).

8. The unmanned aerial vehicle piston engine braking device according to claim 6, characterized in that: The bearing bracket (6) is provided with a through hole for the shaft (4) to pass through, and a radial bearing (5) is installed in the through hole.

9. The unmanned aerial vehicle piston engine braking device according to claim 3, characterized in that: At least four guide posts (411) are fixed to one end of the movable post (409) facing the connecting rod (404), and the guide posts (411) are inserted into guide holes (416) formed on the connecting rod (404).

10. The unmanned aerial vehicle piston engine braking device according to claim 2, characterized in that: The power source includes a linear push-pull electromagnet mounted on the bearing bracket (6), and the follower unit includes a permanent magnet fixed to an end of the shaft (4) away from the mounting plate (402).

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