Brake system of skating take-off and landing light unmanned aerial vehicle

Abstract

According to the braking system, balance rods are fixedly connected to the left side and the right side of the tail of an unmanned aerial vehicle body, empennages are fixedly connected to the ends of the two balance rods, embedded mounting grooves are formed in the lower surfaces of the two balance rods, and braking devices are arranged in the embedded mounting grooves. A sliding block is slidably connected into the sliding groove, a supporting arm is fixedly connected to the outer surface of the sliding block, a second swing arm is connected to the left side of the sliding block through a rotating shaft, and a friction plate mounting movable seat is movably connected into the retainer. The two swing arms are connected, the baffles and the guide wheels are used for guiding, finally, the friction plate mounting movable seat drives the friction plate to be close to a take-off and landing runway, friction force is generated, the unmanned aerial vehicle is braked, a braking point of the device is located on the rear half section of the unmanned aerial vehicle, large dragging force is generated, short-distance braking of the unmanned aerial vehicle during landing is facilitated, and the unmanned aerial vehicle is prevented from falling off. And the device is symmetrically arranged, so that deflection and drifting of the advancing route of the unmanned aerial vehicle during braking are effectively avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of UAV brakes, and particularly to a braking system for a light UAV with takeoff and landing by taxiing. Background Art

[0002] At present, with the continuous development of UAV technology, light UAVs with takeoff and landing by taxiing have been widely used in many fields due to their unique advantages. However, the performance of their braking systems has always been one of the key factors restricting the safe and stable operation of UAVs.

[0003] There are some obvious deficiencies in the existing braking systems for light UAVs with takeoff and landing by taxiing. Some braking systems adopt traditional mechanical braking methods, which have a relatively complex structure and are prone to wear problems during long-term use, resulting in unstable braking performance. Moreover, it is difficult to adjust the braking force, and it is difficult to accurately control according to different landing scenarios and UAV states.

[0004] There are also some braking systems that set the braking point in the first half of the UAV or other unreasonable positions. Such a setting makes the torque generated by the braking force smaller and the drag force insufficient. The UAV needs a longer runway to complete braking during landing, which not only places higher requirements on the takeoff and landing site but also increases the safety risks during landing.

[0005] In addition, during the braking process of traditional braking systems, the distribution of the braking force is often not uniform. When the UAV performs a braking operation, it is easy to have a yaw and drift of the traveling route, which greatly affects the stability and safety of the UAV landing and may even lead to accidents such as UAV out of control and collision.

[0006] Moreover, the existing braking systems do not fully consider the characteristics of light UAVs in design and have a problem of large weight, which undoubtedly increases the load of the UAV and affects its flight performance and endurance. At the same time, the maintenance cost of these braking systems is also relatively high, and it is necessary to frequently repair and replace components, which brings inconvenience to the use of the UAV.

[0007] In summary, the existing braking systems for light UAVs with takeoff and landing by taxiing have defects in braking force, stability, structural complexity, and weight. There is an urgent need for a braking system that can achieve short-distance braking, avoid yaw and drift, has a simple structure, and is light in weight. Based on such a background, the present invention aims to solve these problems existing in the prior art and provide a braking system for a light UAV with takeoff and landing by taxiing with better performance. Summary of the Invention

[0008] The object of the present invention is to solve at least one of the technical problems existing in the prior art, and to provide a braking system for a light take-off and landing unmanned aerial vehicle (UAV) by skidding. The braking device is installed at the bottom of two balance rods. The electric push rod drives the slider, and then the friction plate mounting movable seat moves. Through the connection of two swing arms and the guidance of the baffle and the guide wheel, finally the friction plate mounting movable seat drives the friction plate to approach the take-off and landing runway, so as to generate frictional force and brake the UAV. The braking point of the device is located at the rear half of the UAV, generating a large braking force, which helps the UAV to stop quickly during landing. And the device is symmetrically arranged to effectively avoid the yaw and drift of the UAV's traveling route during braking.

[0009] The present invention also provides a braking system for a light take-off and landing UAV by skidding, including: a UAV fuselage. On the left and right sides of the tail of the UAV fuselage, balance rods are fixedly connected. At the ends of the two balance rods, tail wings are fixedly connected. On the lower surfaces of the two balance rods, embedded installation grooves are provided, and a braking device is arranged inside the embedded installation grooves.

[0010] The braking device includes: a cage. A chute is provided on the inner wall of the cage. A slider is slidably connected inside the chute. An arm is fixedly connected to the outer surface of the slider. An electric push rod is fixedly connected inside the cage. The output end of the electric push rod is fixedly connected to the arm. The left side of the slider is connected to a second swing arm through a rotating shaft, and the right side of the slider is connected to a first swing arm through a rotating shaft. A friction plate mounting movable seat is movably connected inside the cage. A friction plate is detachably connected to the lower surface of the friction plate mounting movable seat. On the right side of the upper surface of the friction plate mounting movable seat, a first connecting bracket is fixedly connected. The first connecting bracket is rotatably connected to the first swing arm through a rotating shaft. On the left side of the upper surface of the friction plate mounting movable seat, a second connecting bracket is fixedly connected. The second connecting bracket is rotatably connected to the second swing arm through a rotating shaft. One end of the second swing arm is fixedly connected with a movable guide wheel. A baffle is fixedly connected inside the cage. A guide groove is provided on the outer surface of the baffle. The movable guide wheel is in rolling connection with the guide groove.

[0011] According to a braking system for a light take-off and landing UAV by skidding provided by the present invention, a top sealing plate is fixedly connected to the upper surface of the cage, and a bottom protection plate is fixedly connected to the lower surface of the cage.

[0012] According to a braking system for a light take-off and landing UAV by skidding provided by the present invention, a notch is reserved between the right end of the bottom protection plate and the cage. The friction plate mounting movable seat is movable at the notch and inside the cage.

[0013] A taxi - takeoff and landing light UAV braking system provided by the present invention, a propeller is installed on the outer surface of the UAV fuselage, and the propeller is located between the two balance rods.

[0014] A taxi - takeoff and landing light UAV braking system provided by the present invention, a fixed wing is installed on the outer surface of the UAV fuselage, and ailerons and flaps are connected to the fixed wing through servos.

[0015] A taxi - takeoff and landing light UAV braking system provided by the present invention, a rudder is connected to the tail wing through a servo, and an elevator is connected to the tail wing through a servo.

[0016] A taxi - takeoff and landing light UAV braking system provided by the present invention, a landing gear is installed at the bottom of the UAV fuselage, and a wheel set is installed at the bottom of the landing gear.

[0017] A taxi - takeoff and landing light UAV braking system provided by the present invention, the friction plate is slidably connected to the surface of the takeoff - landing runway.

[0018] Compared with the prior art, in a taxi - takeoff and landing light UAV braking system of the present invention, by the braking device installed at the bottom of the two balance rods, the electric push rod drives the slider, and then makes the friction plate mounting movable seat move. Through the connection of the two swing arms and with the baffle and guide wheels as guides, finally, the friction plate mounting movable seat drives the friction plate to approach the takeoff - landing runway, thereby generating frictional force to brake the UAV.

[0019] Compared with the prior art, in a taxi - takeoff and landing light UAV braking system of the present invention, the braking point of the device is located in the rear half of the UAV, generating a large braking force, which helps the UAV to stop quickly within a short distance during landing. And the device is symmetrically arranged to effectively avoid the deviation and drift of the UAV's traveling route during braking. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below with reference to the drawings and embodiments; Figure 1 is the overall structure diagram of a taxi - takeoff and landing light UAV of the present invention; Figure 2 is the bottom view of a taxi - takeoff and landing light UAV of the present invention; Figure 3 is the overall structure diagram of a taxi - takeoff and landing light UAV braking system of the present invention; Figure 4 is the internal structure schematic diagram of a taxi - takeoff and landing light UAV braking system of the present invention; Figure 5 is of a taxi - takeoff and landing light UAV braking system of the present invention Figure 4 enlarged view at A.

[0021] Legend Explanation: 1. UAV fuselage; 2. Fixed wing; 3. Tail wing; 4. Balance bar; 5. Wheel set; 6. Embedded installation groove; 7. Brake device; 701. Cage; 702. Upper sealing plate; 703. Bottom protection plate; 704. Friction plate; 705. Friction plate installation movable seat; 706. Chute; 707. Electric push rod; 708. First connecting bracket; 709. Slide block; 710. Arm; 711. First swing arm; 712. Second connecting bracket; 713. Baffle; 714. Movable guide wheel; 715. Guide groove; 716. Second swing arm; 8. Propeller. Specific Embodiment

[0022] This part will describe the specific embodiments of the present invention in detail. The preferred embodiments of the present invention are shown in the drawings. The function of the drawings is to supplement the description of the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it should not be construed as a limitation on the protection scope of the present invention.

[0023] Referring to Figures 1-5 , an embodiment of the present invention is a braking system for a light takeoff and landing UAV with a skid takeoff and landing, which includes: a UAV fuselage 1. Balance bars 4 are fixedly connected to both the left and right sides of the tail of the UAV fuselage 1. Tail wings 3 are fixedly connected to the ends of the two balance bars 4. Embedded installation grooves 6 are provided on the lower surfaces of the two balance bars 4. A brake device 7 is provided inside the embedded installation groove 6; the brake device 7 includes: a cage 701. A chute 706 is provided on the inner wall of the cage 701. A slide block 709 is slidably connected inside the chute 706. An arm 710 is fixedly connected to the outer surface of the slide block 709. An electric push rod 707 is fixedly connected inside the cage 701. The output end of the electric push rod 707 is fixedly connected to the arm 710. A second swing arm 716 is connected to the left side of the slide block 709 through a rotating shaft. A first swing arm 711 is connected to the right side of the slide block 709 through a rotating shaft. A friction plate installation movable seat 705 is movably connected inside the cage 701. A friction plate 704 is detachably connected to the lower surface of the friction plate installation movable seat 705; the friction plate 704 is slidably connected to the surface of the takeoff and landing runway.

[0024] A first connecting bracket 708 is fixedly connected to the right side of the upper surface of the friction plate installation movable seat 705. The first connecting bracket 708 is rotatably connected to the first swing arm 711 through a rotating shaft. A second connecting bracket 712 is fixedly connected to the left side of the upper surface of the friction plate installation movable seat 705. The second connecting bracket 712 is rotatably connected to the second swing arm 716 through a rotating shaft. One end of the second swing arm 716 is fixedly connected to a movable guide wheel 714. A baffle 713 is fixedly connected inside the cage 701. A guide groove 715 is provided on the outer surface of the baffle 713. The movable guide wheel 714 is in rolling connection with the guide groove 715.

[0025] The upper surface of the cage 701 is fixedly connected with an upper sealing plate 702, and the lower surface of the cage 701 is fixedly connected with a bottom protection plate 703. There is a notch reserved between the right end of the bottom protection plate 703 and the cage 701, and the friction plate mounting movable seat 705 is movable at the notch and inside the cage 701.

[0026] Propellers 8 are installed on the outer surface of the UAV fuselage 1, and the propellers 8 are located between the two balance bars 4. A fixed wing 2 is installed on the outer surface of the UAV fuselage 1, and ailerons and flaps are connected to the fixed wing 2 through servos. A rudder is connected to the tail wing 3 through a servo, and an elevator is connected to the tail wing 3 through a servo. Landing gears are installed at the bottom of the UAV fuselage 1, and wheel sets 5 are installed at the bottoms of the landing gears.

[0027] Working principle: After the electric push rod 707 is powered on, its output end pushes the support arm 710, driving the slider 709 to slide in the chute 706 on the inner wall of the cage 701. The moving direction of the slider 709 is determined by the telescopic direction of the electric push rod 707: when the electric push rod 707 extends, the slider 709 slides to the side away from the electric push rod 707; when the electric push rod 707 retracts, the slider 709 slides in the reverse direction.

[0028] The left side of the slider 709 is connected to the second swing arm 716 through a rotating shaft, and the right side is connected to the first swing arm 711. When the slider moves, the first swing arm 711 and the second swing arm 716 rotate around the rotating shaft. When the slider 709 moves, the movements of the first swing arm 711 and the second swing arm 716 will push the friction plate mounting movable seat 705 to move downward or upward. An active guide wheel 714 is fixed at the end of the second swing arm 716. When the electric push rod 707 drives the friction plate mounting movable seat 705 to perform a braking action, when the active guide wheel 714 runs to the guide groove 715 on the inner baffle 713 of the cage 701 and generates an impact, thereby changing the moving direction of the friction plate mounting movable seat 705. At this time, the horizontal movement in the front and back direction is converted into the up and down movement. The guide groove 715 ensures its stable movement along the direction perpendicular to the runway and avoids shaking.

[0029] When the friction plate mounting movable seat 705 moves downward, it drives the friction plate 704 to extend out of the notch of the bottom protection plate 703 and makes sliding contact with the surface of the takeoff and landing runway. The frictional force between the friction plate 704 and the runway forms a braking force, which acts on the tail of the UAV and generates a large dragging force, causing the UAV to stop braking in a short distance.

[0030] Since the braking devices 7 are symmetrically installed below the balance bars 4 on both sides, the braking forces on both sides are uniform, which can effectively prevent the drone from yawing or drifting during braking. When the drone completes braking or needs to release the brake, the electric push rod 707 retracts, driving the slider 709 to slide in the reverse direction. The first swing arm 711 and the second swing arm 716 rotate in the reverse direction, pulling the friction plate mounting movable seat 705 upward, so that the friction plate 704 retracts into the cage 701 and disengages from the runway surface, and the drone resumes normal taxiing.

[0031] The embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the scope of knowledge possessed by those of ordinary skill in the art.

Claims

1. A braking system for a light takeoff and landing unmanned aerial vehicle during taxiing, characterized in that Comprising: The drone fuselage (1), both the left and right sides of the tail of the drone fuselage (1) are fixedly connected with balance rods (4), the ends of the two balance rods (4) are fixedly connected with tail fins (3), the lower surfaces of the two balance rods (4) are both provided with embedded mounting grooves (6), and a braking device (7) is arranged inside the embedded mounting grooves (6); The braking device (7) includes: a cage (701), the inner wall of the cage (701) is provided with a chute (706), a slider (709) is slidably connected inside the chute (706), an arm (710) is fixedly connected to the outer surface of the slider (709), an electric push rod (707) is fixedly connected inside the cage (701), the output end of the electric push rod (707) is fixedly connected to the arm (710), the left side of the slider (709) is connected with a second swing arm (716) through a rotating shaft, the right side of the slider (709) is connected with a first swing arm (711) through a rotating shaft, a friction plate mounting movable seat (705) is movably connected inside the cage (701), and a friction plate (704) is detachably connected to the lower surface of the friction plate mounting movable seat (705); A first connecting bracket (708) is fixedly connected to the upper surface right side of the friction plate mounting movable seat (705), the first connecting bracket (708) is rotatably connected with the first swing arm (711) through a rotating shaft, a second connecting bracket (712) is fixedly connected to the upper surface left side of the friction plate mounting movable seat (705), the second connecting bracket (712) is rotatably connected with the second swing arm (716) through a rotating shaft, one end of the second swing arm (716) is fixedly connected with a movable guide wheel (714), a baffle (713) is fixedly connected inside the cage (701), a guide groove (715) is arranged on the outer surface of the baffle (713), and the movable guide wheel (714) is in rolling connection with the guide groove (715).

2. The braking system for a light takeoff and landing unmanned aerial vehicle with taxiing according to claim 1, characterized in that An upper sealing plate (702) is fixedly connected to the upper surface of the cage (701), and a bottom guard plate (703) is fixedly connected to the lower surface of the cage (701).

3. The braking system for a light takeoff and landing unmanned aerial vehicle with a taxiing takeoff and landing according to claim 2, characterized in that, A notch is reserved between the right end of the bottom guard plate (703) and the cage (701), and the friction plate mounting movable seat (705) is movable at the notch and inside the cage (701).

4. A braking system for a takeoff and landing light unmanned aerial vehicle by taxiing according to claim 1, characterized in that, A propeller (8) is installed on the outer surface of the drone fuselage (1), and the propeller (8) is located between the two balance rods (4).

5. The braking system for a light takeoff and landing unmanned aerial vehicle with taxiing as claimed in claim 1, wherein A fixed wing (2) is installed on the outer surface of the drone fuselage (1), and ailerons and flaps are connected to the fixed wing (2) through servos.

6. The braking system for a takeoff and landing light unmanned aerial vehicle by taxiing according to claim 1, characterized in that, A rudder is connected to the tail fin (3) through a servo, and an elevator is connected to the tail fin (3) through a servo.

7. The braking system for a light take-off and landing unmanned aerial vehicle using a runway according to claim 1, wherein A landing gear is installed at the bottom of the drone fuselage (1), and a wheel set (5) is installed at the bottom of the landing gear.

8. The braking system for a light takeoff and landing unmanned aerial vehicle with taxiing according to claim 1, characterized in that, The friction plate (704) is in sliding connection with the surface of the takeoff and landing runway.

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