A fully movable horizontal tail mechanism for unmanned aerial vehicle

Abstract

In order to meet the requirements of UAV for light weight and high reliability of horizontal tail mechanism, the present invention proposes a UAV full-moving horizontal tail mechanism. The mechanism is suitable for UAV with full-moving horizontal tail, and realizes the deflection of the horizontal tail driven by the servo through a simple and reliable transmission mechanism, and has the characteristics of high reliability and light weight.

Description

Technical Field

[0001] The invention relates to a fully movable horizontal tail mechanism of an unmanned aerial vehicle. Background Art

[0002] At present, some small UAVs use a fully movable horizontal tail mechanism to improve their pitch maneuverability. At the same time, under the condition of achieving their functions, UAVs, which are extremely sensitive to the weight of the entire machine, pursue lightweighting of each component during the design and manufacturing process. Therefore, a fully movable horizontal tail mechanism is needed, which is as light as possible and highly reliable.

[0003] The horizontal tail of a UAV is an important structure that provides it with pitch maneuverability. The aerodynamic characteristics of some small UAVs determine that they need to be equipped with a full-moving horizontal tail to improve pitch maneuverability. Under the condition of achieving its functions, small UAVs also have higher requirements for the reliability and weight of the horizontal tail. The reliability of the horizontal tail of a UAV directly affects the flight safety of the UAV. A highly reliable horizontal tail mechanism is an important guarantee for the safe flight of the UAV. At the same time, the horizontal tail is generally located at the rear of the UAV. The increase in its weight will reduce the stability margin of the UAV. In order to compensate for the reduction in the stability margin, the counterweight of the UAV needs to be increased, which is unacceptable for UAVs that are sensitive to take-off weight. Therefore, it is necessary to design a highly reliable and lightweight full-moving horizontal tail mechanism to meet actual needs. Summary of the invention

[0004] According to one aspect of the present invention, a fully movable horizontal tail mechanism for an unmanned aerial vehicle is provided, which is characterized by comprising:

[0005] A pair of horizontal tail fins,

[0006] Tail connecting rod,

[0007] Horizontal tail mounting bracket,

[0008] in:

[0009] The pair of horizontal tail fins are fixedly connected to the tail connecting rod via a horizontal tail fin mounting frame.

[0010] The horizontal tail mounting bracket is located below the tail connecting rod to prevent water from accumulating inside the horizontal tail mounting bracket and affecting the operation of the servo.

[0011] The horizontal tail mounting frame fixes the horizontal tail and controls its deflection. The horizontal tail mounting frame includes:

[0012] The overall frame includes a front vertical plate, a middle plate, a rear vertical plate, a steering gear mounting plate, a left side plate and a right side plate, wherein: the front vertical plate, the middle plate and the rear vertical plate are passed through by the tail connecting rod, and the left side plate and the right side plate cooperate with the front vertical plate, the middle plate and the rear vertical plate respectively to realize the fixed connection between the horizontal tail mounting frame and the tail connecting rod,

[0013] The horizontal tail mounting rod passes through the positioning hole between the left plate and the right plate to achieve relative fixation between the horizontal tail mounting rod and the tail connecting rod.

[0014] The horizontal tail rocker arm has a fixing hole, a positioning bolt hole, and a steering gear rocker arm transmission hole. The horizontal tail mounting rod is inserted into the horizontal tail rocker arm, and the horizontal tail rocker arm fixing bolt is screwed into the positioning bolt hole to achieve the fixation of the horizontal tail rocker arm and the horizontal tail mounting rod.

[0015] The servo is installed on the servo mounting plate through the servo bracket.

[0016] The servo rocker arm is connected to the servo and rotates synchronously.

[0017] The connecting rod is connected to the servo rocker arm and the horizontal tail rocker arm, so that the movement of the servo is transmitted to the horizontal tail through the servo rocker arm, the connecting rod and the horizontal tail rocker arm. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a bottom view of a fully movable horizontal tail mechanism of a small UAV according to an embodiment of the present invention.

[0019] Figure 2 The present invention is a front view of a horizontal tail connection portion of a full-moving horizontal tail mechanism of a UAV according to an embodiment of the present invention.

[0020] Figure 3 The figure is an exploded view of a horizontal tail mounting frame of a full-moving horizontal tail mechanism of a UAV according to an embodiment of the present invention.

[0021] Figure 4 is an isometric view of a horizontal tail rocker arm according to one embodiment of the present invention.

[0022] Figure 5 and Figure 6 Schematic diagram of a horizontal tail connection portion according to an embodiment of the present invention. DETAILED DESCRIPTION

[0023] The fully movable horizontal tail mechanism of the small unmanned aerial vehicle according to the present invention is realized by rationally assembling a horizontal tail (1), a horizontal tail mounting rod (21), and a horizontal tail mounting frame (2).

[0024] Overall structure

[0025] A bottom view of a fully movable horizontal tail mechanism of a small UAV according to an embodiment of the present invention is shown in FIG. Figure 1 As shown, a pair of horizontal tails (1) are connected to the tail connecting rod (3) through a horizontal tail mounting frame (2) to achieve fixation. A front view of the horizontal tail connection part of a full-motion horizontal tail mechanism of a drone according to an embodiment of the present invention is shown in FIG. Figure 2 As shown, the horizontal tail wing mounting frame (2) is located below the tail wing connecting rod (3) in order to prevent water from accumulating inside the horizontal tail wing mounting frame (2) and affecting the normal operation of the steering gear (20).

[0026] Horizontal tail mounting bracket

[0027] An exploded view of a horizontal tail mounting frame of a fully movable horizontal tail mechanism of a UAV according to an embodiment of the present invention is shown in FIG. Figure 3 As shown, the schematic diagram of the horizontal tail connection part is as follows Figure 6 The horizontal tail wing mounting frame (2) realizes the function of fixing the horizontal tail wing (1) and controlling its deflection.

[0028] In fixing the horizontal tail (1), the overall frame is assembled by a front vertical plate (9), a middle vertical plate (11), a rear vertical plate (4), a steering gear mounting plate (10), a left side plate (6) and a right side plate (12). The front vertical plate (9), the middle vertical plate (11) and the rear vertical plate (4) are penetrated by the tail connecting rod (3). The left side plate (6) and the right side plate (12) are respectively matched with the front vertical plate (9), the middle vertical plate (11) and the rear vertical plate (4), and resin glue is filled in the connecting gap to realize the fixed connection between the horizontal tail mounting frame (2) and the tail connecting rod (3). The horizontal tail mounting rod (21) ( Figure 6 ) passes through the positioning hole (7) between the left plate (6) and the right plate (12) to achieve the fixation of the relative position of the horizontal tail mounting rod (21) and the tail connecting rod (3). According to one embodiment, the front vertical plate (9), the left plate (6), the right plate (12) and the rear vertical plate (4) are provided with threading holes (8) on the top. After the various components of the horizontal tail mounting frame (2) are bonded, high-strength silk threads are passed through the threading holes (8) and tied to fix them, thereby improving the connection strength. According to one embodiment, in order to reduce the pressure of the contact part between the horizontal tail mounting rod (21) and the left plate (6) and the right plate (12), a reinforcement ring (5) is bonded on the left plate (6) and the right plate (12) to increase the contact area between the two, and an anti-friction sleeve (13) is inserted into the inner ring of the reinforcement ring (5). The material of the contact surface is changed to reduce wear, thereby further improving the reliability of the horizontal tail mounting frame (2).

[0029] In order to prevent wear from occurring during the relative movement between the edge of the horizontal tail (1) and the horizontal tail mounting frame (2), an anti-friction retaining ring (29) is added between the two.

[0030] Horizontal tail transmission mechanism

[0031] Among the transmission components for controlling the deflection of the horizontal tail (1), the isometric view of the horizontal tail rocker arm (15) is shown in FIG. Figure 4 The schematic diagram of the horizontal tail connection part is shown in Figure 5 and Figure 6 The steering gear (20) is mounted on the steering gear mounting plate (10) through the steering gear mounting bolts (27) and the steering gear bracket (28). The steering gear rocker arm (26) is connected to the steering gear (20) and rotates synchronously.

[0032] like Figure 4 As shown, the horizontal tail rocker arm (15) has the characteristics of a fixing hole (17), a positioning bolt hole (16), and a steering gear rocker arm transmission hole (14).

[0033] like Figure 6 As shown, the horizontal tail mounting rod (21) penetrates into the horizontal tail rocker arm (15), and the horizontal tail rocker arm (15) and the horizontal tail mounting rod (21) are fixed by screwing a horizontal tail rocker arm fixing bolt (22) into the positioning bolt hole (16).

[0034] like Figure 6 As shown, the connection between the connecting rod (18) and the steering gear rocker arm (26) is achieved by the cooperation of the steering gear rocker arm fastening bolt (25) and the steering gear rocker arm fastening nut (19) that penetrate into the steering gear rocker arm (26), and the connection between the connecting rod (18) and the horizontal tail rocker arm (15) is achieved by the cooperation of the horizontal tail rocker arm fastening bolt (24) and the horizontal tail rocker arm fastening nut (23). Finally, the movement of the steering gear (20) is transmitted to the horizontal tail (1) through the steering gear rocker arm (26), the connecting rod (18) and the horizontal tail rocker arm (15).

[0035] According to the process, Figure 3 As shown, after bonding the various structural components of the horizontal tail mounting frame (2), the horizontal tail mounting frame (2) is bonded to the tail connecting rod (3), and parts such as the steering gear (20), the steering gear rocker arm (26), the horizontal tail mounting rod (21) and the horizontal tail rocker arm (15) are installed. Finally, the horizontal tail (1) is fixed to the horizontal tail mounting rod (21), thereby achieving complete assembly of the horizontal tail (1).

[0036] The steering engine (20) is powered on and a motion command is issued, so that the steering engine (20) drives the horizontal tail (1) to deflect. The deflection angle is measured, and the length of the connecting rod (18) is manually adjusted so that the deflection angle of the horizontal tail (1) meets the design index.

[0037] The beneficial effects of the present invention include:

[0038] 1) The horizontal tail is fixed without significantly increasing the weight of the UAV tail;

[0039] 2) The horizontal tail wing mounting frame (2) is bonded to the tail wing connecting rod (3) through the front vertical plate (9), the middle vertical plate (11), the rear vertical plate (4), and the horizontal tail wing mounting frame (2), so that the bonding strength is high and the torsion resistance is strong;

[0040] 3) By providing an anti-friction retaining ring (29), the friction between the moving unit and the stationary unit is reduced;

[0041] 4) By providing the reinforcement ring (5), the pressure of the contact portion between the horizontal tail wing mounting rod (21) and the left side plate (6) and the right side plate (12) is reduced;

[0042] 5) By providing threading holes (8) between the front vertical plate (9) and the rear vertical plate (4) and the left side plate (6) and the right side plate (12), and passing high-strength wires through the threading holes (8) to achieve secondary reinforcement, the reliability of the horizontal tail mounting frame (2) is further improved;

[0043] 6) The horizontal tail mounting frame (2) is inverted, that is, the horizontal tail mounting frame (2) is located below the space of the tail connecting rod (3), thereby preventing the accumulation of precipitation during the flight of the UAV from affecting the steering gear (20).

Claims

1. A fully movable horizontal tail mechanism for an unmanned aerial vehicle, characterized in that include: a pair of horizontal tail fins (1), Tail connecting rod (3), Horizontal tail mounting bracket (2), in: The pair of horizontal tail wings (1) and the tail connecting rod (3) are fixedly connected via a horizontal tail wing mounting frame (2). The horizontal tail wing mounting frame (2) is located below the tail wing connecting rod (3) and is used to prevent water from accumulating inside the horizontal tail wing mounting frame (2) and affecting the operation of the steering gear (20). The horizontal tail wing mounting frame (2) realizes the function of fixing the horizontal tail wing (1) and controlling its deflection. The horizontal tail mounting frame (2) includes: The overall frame includes a front vertical plate (9), a middle vertical plate (11), a rear vertical plate (4), a steering gear mounting plate (10), a left side plate (6) and a right side plate (12), wherein: the front vertical plate (9), the middle vertical plate (11) and the rear vertical plate (4) are penetrated by the tail connecting rod (3), and the left side plate (6) and the right side plate (12) are respectively matched with the front vertical plate (9), the middle vertical plate (11) and the rear vertical plate (4) to realize the fixed connection between the horizontal tail mounting frame (2) and the tail connecting rod (3). The horizontal tail wing mounting rod (21) passes through the positioning hole (7) between the left side plate (6) and the right side plate (12) to achieve relative fixation between the horizontal tail wing mounting rod (21) and the tail wing connecting rod (3). The horizontal tail rocker arm (15) has a fixing hole (17), a positioning bolt hole (16), and a steering gear rocker arm transmission hole (14). The horizontal tail mounting rod (21) penetrates into the horizontal tail rocker arm (15), and the horizontal tail rocker arm fixing bolt (22) is screwed into the positioning bolt hole (16) to achieve the fixing of the horizontal tail rocker arm (15) and the horizontal tail mounting rod (21). The steering gear (20) is mounted on the steering gear mounting plate (10) via a steering gear bracket (28). A steering gear rocker arm (26) is connected to the steering gear (20) and rotates synchronously. The connecting rod (18) is connected to the steering gear rocker arm (26) and the horizontal tail rocker arm (15), so that the movement of the steering gear (20) is transmitted to the horizontal tail (1) through the steering gear rocker arm (26), the connecting rod (18) and the horizontal tail rocker arm (15).

2. The UAV full-moving horizontal tail mechanism according to claim 1 is characterized in that: The front vertical plate (9), the left side plate (6), the right side plate (12) and the rear vertical plate (4) are provided with threading holes (8). After the various components of the horizontal tail wing mounting frame (2) are installed, high-strength silk threads are passed through the threading holes (8) and tied and fixed to improve the connection strength.

3. The UAV full-moving horizontal tail mechanism according to claim 1 is characterized in that Further including: The reinforcing ring (5) bonded to the left side plate (6) and the right side plate (12) is used to increase the contact area between the two and reduce the pressure of the contact part between the horizontal tail wing mounting rod (21) and the left side plate (6) and the right side plate (12).

4. The UAV full-moving horizontal tail mechanism according to claim 1 is characterized in that Further including: The anti-friction sleeve (13) inserted into the inner ring of the reinforcement ring (5) is used to reduce wear by changing the material of the contact surface.

5. The UAV full-moving horizontal tail mechanism according to claim 1 is characterized in that Further including: An anti-friction retaining ring (29) is arranged between the edge of the horizontal tail (1) and the horizontal tail mounting frame (2) to prevent wear during relative movement.

6. The UAV full-moving horizontal tail mechanism according to claim 1, characterized in that: The horizontal tail wing mounting frame (2) and the tail wing connecting rod (3) are fixedly connected by filling resin glue into each connected gap.

7. The UAV full-moving horizontal tail mechanism according to claim 1, characterized in that: The connection between the connecting rod (18) and the steering gear rocker arm (26) is achieved through the cooperation of a steering gear rocker arm fastening bolt (25) that penetrates into the steering gear rocker arm (26) and a steering gear rocker arm fastening nut (19), and the connection between the connecting rod (18) and the horizontal tail rocker arm (15) is achieved through the cooperation of a horizontal tail rocker arm fastening bolt (24) and a horizontal tail rocker arm fastening nut (23).

8. The UAV full-moving horizontal tail mechanism according to claim 1, characterized in that: The steering gear (20) is mounted on the steering gear mounting plate (10) via steering gear mounting bolts (27).

9. The UAV full-moving horizontal tail mechanism according to any one of claims 1 to 8, characterized in that: By energizing the steering gear (20) and issuing a motion command, the steering gear (20) drives the horizontal tail (1) to deflect, and by measuring the deflection angle of the horizontal tail (1), the length of the connecting rod (18) is adjusted so that the deflection angle of the horizontal tail (1) meets the design value.

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