Tandem double-rotor unmanned helicopter safety guarantee device

Abstract

The utility model discloses a tandem type double-rotor unmanned helicopter safety guarantee device, which belongs to the technical field of unmanned aerial vehicles and comprises a true current motor, rotating rods are symmetrically and fixedly connected to the outer end of a rotor of the true current motor, the rotating rods and the true current motor are of an integrated structure, worm thread sleeves are fixedly connected to the exteriors of the two rotating rods, and the worm thread sleeves are fixedly connected to the interiors of the two rotating rods. Worm gear sleeves are meshed with the exteriors of the two worm gear sleeves, a swing frame is fixedly installed on the two worm gear sleeves, a bearing frame is rotationally installed on the lower portion of the swing frame, the swing frame is driven to swing through the worm gear sleeves, the protective frame is driven to descend through the swing frame, the number of turns of a rotating rod driven by a true current motor is controlled through a program, and the swing frame only swings by 180 degrees; and during take-off, the protection frame is blocked on the outer side of the propeller through reverse driving, the effect of protecting the propeller is achieved, the overall load is reduced by means of the dual-purpose mode of the swing frame and the protection frame, and practicability is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of unmanned aerial vehicles, and particularly relates to a safety protection device for a tandem dual-rotor unmanned helicopter. Background Art

[0002] An unmanned aerial vehicle, abbreviated as "UAV", is an unpiloted aircraft controlled by a radio remote control device and a self-provided program control device, or is completely or intermittently autonomously operated by an on-vehicle computer.

[0003] The landing gear is one of the necessary protection measures for a tandem dual-rotor unmanned helicopter. However, there is a lack of a protection mechanism outside the propellers of the tandem dual-rotor unmanned helicopter. After directly adding a protection structure outside, both its wind resistance and load will increase, resulting in a relatively low practicality of the conventional protection device for a tandem dual-rotor unmanned helicopter.

[0004] Therefore, we propose a safety protection device for a tandem dual-rotor unmanned helicopter to solve the above problems. Content of the Utility Model

[0005] The purpose of the utility model is to solve the problem of relatively low practicality of the conventional protection device for a tandem dual-rotor unmanned helicopter, and to propose a safety protection device for a tandem dual-rotor unmanned helicopter.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] A safety protection device for a tandem dual-rotor unmanned helicopter, including a DC motor. Symmetrically fixed to the outer end of the rotor of the DC motor are rotating rods, and the rotating rods and the DC motor are of an integral structure. Threaded sleeves are fixedly connected to the outside of both rotating rods. Worm gear sleeves are engaged with the outside of both threaded sleeves. A swing frame is fixedly installed on both worm gear sleeves. A bearing frame is rotatably installed at the lower part of the swing frame. Protective frames are fixedly connected to the upper ends of both swing frames. The housing of the DC motor is fixedly connected to the bearing frame. A first limit block and a second limit block are fixedly connected to the outer end of the bearing frame. Before falling, the DC motor is used to drive the rotating rods to rotate, the rotating rods drive the threaded sleeves to rotate, the threaded sleeves drive the worm gear sleeves to rotate, the worm gear sleeves drive the swing frame to swing, the swing frame drives the protective frame to descend, and the first limit block is used to limit the downward turning amplitude of the swing frame, so that the swing frame only swings 180 degrees, thereby making the swing frame and the protective frame become the landing gear. When taking off, reverse driving is used to make the protective frame block outside the propellers, and the first limit block is used to limit the upward turning amplitude, playing a role in protecting the propellers. By using the dual-purpose mode of the swing frame and the protective frame, the overall load is reduced and the practicality is improved.

[0008] Preferably, an installation disk is fixedly connected to the upper ends of the DC motor and the bearing bracket. The DC motor and the bearing bracket are fixedly connected to the target UAV through the installation disk.

[0009] Preferably, the installation disk includes a disk body, and an installation hole is hollowed out at the upper end of the disk body. It is convenient for screws to pass through the installation disk and be fixed to the target UAV through the installation hole.

[0010] Preferably, the installation disk further includes a reinforcing rod, and the reinforcing rod is fixedly connected inside the disk body. The reinforcing rod is used to increase the firmness of the disk body.

[0011] Preferably, the bearing bracket includes a connecting strip and bearings, and the bearings are symmetrically and fixedly connected to the side ends of the connecting strip. The bearings facilitate guiding the swing frame to rotate.

[0012] Preferably, the swing frame includes an arc rod and a rotating shaft, and the lower end of the arc rod is fixedly connected to the side end of the rotating shaft. When the rotating shaft rotates inside the bearing, the arc rod is driven to swing by the rotating shaft, and the protective frame is driven to switch up and down positions by the arc rod, facilitating switching the state of the protective frame.

[0013] Preferably, a rotating groove is provided at the waist of the rotating shaft. The rotating groove increases the stability of the rotational connection between the rotating shaft and the bearing bracket.

[0014] In summary, the technical effects and advantages of the present utility model are as follows:

[0015] 1. Before falling, the DC motor is used to drive the rotating rod to rotate, the rotating rod drives the spiral thread sleeve to rotate, the spiral thread sleeve drives the worm gear sleeve to rotate, the worm gear sleeve drives the swing frame to swing, and the swing frame drives the protective frame to descend. The number of turns of the rotating rod driven by the DC motor is controlled by a program, so that the swing frame only swings 180 degrees, thereby making the swing frame and the protective frame become landing gears. During takeoff, reverse driving is used to make the protective frame block outside the propeller, playing a role in protecting the propeller. By using the dual-purpose method of the swing frame and the protective frame, the overall load is reduced and the practicability is improved.

[0016] 2. When the rotating shaft rotates inside the bearing, the arc rod is driven to swing by the rotating shaft, and the protective frame is driven to switch up and down positions by the arc rod, facilitating switching the state of the protective frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0018] Figure 2 is a schematic diagram of the structure of the installation disk of the present utility model;

[0019] Figure 3 is a schematic diagram of the structure of the bearing bracket of the present utility model;

[0020] Figure 4Schematic diagram of the swing frame structure of the present utility model.

[0021] In the figure: 1, DC motor; 2, mounting disc; 3, bearing frame; 4, swing frame; 5, rotating rod; 6, spiral thread sleeve; 7, worm gear sleeve; 8, protective frame; 9, first limit block; 10, second limit block; 21, disc body; 22, mounting hole; 23, reinforcing rod; 31, connecting bar; 32, bearing; 41, arc rod; 42, rotating shaft; 43, rotating groove. Specific implementation manner

[0022] Next, the technical solutions in the embodiments of the utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the utility model. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments.

[0023] Refer to Figure 1 , a safety protection device for a tandem dual-rotor unmanned helicopter, including a DC motor 1. The outer ends of the rotors of the DC motor 1 are symmetrically and fixedly connected with rotating rods 5. The rotating rods 5 and the DC motor 1 are of an integral structure. Spiral thread sleeves 6 are fixedly connected to the outsides of the two rotating rods 5. Worm gear sleeves 7 are meshed with the outsides of the two spiral thread sleeves 6. A swing frame 4 is fixedly installed on the two worm gear sleeves 7. A bearing frame 3 is rotatably installed at the lower part of the swing frame 4. Protective frames 8 are fixedly connected to the upper ends of the two swing frames 4. The outer shell of the DC motor 1 is fixedly connected with the bearing frame 3. A first limit block 9 and a second limit block 10 are fixedly connected to the outer end of the bearing frame 3. The DC motor 1 is electrically connected to the target unmanned aircraft.

[0024] Refer to Figure 1 , an installation disc 2 is fixedly connected to the upper ends of the DC motor 1 and the bearing frame 3. The DC motor 1 and the bearing frame 3 are fixedly connected to the target unmanned aircraft through the installation disc 2.

[0025] Refer to Figure 1 and 2 , the installation disc 2 includes a disc body 21. The upper end of the bearing frame 3 is fixedly connected with the DC motor 1. Mounting holes 22 are hollowed out at the upper end of the disc body 21. It is convenient for screws to pass through the installation disc 2 and be fixedly connected with the target unmanned aircraft through the mounting holes 22.

[0026] Refer to Figure 1 and 2 , the installation disc 2 further includes a reinforcing rod 23. The upper end of the DC motor 1 is fixedly connected with the reinforcing rod 23. The reinforcing rod 23 is fixedly connected inside the disc body 21. The reinforcing rod 23 is used to increase the firmness of the disc body 21.

[0027] Refer to Figure 1 , 2As shown in FIGS. 2 and 3, the bearing housing 3 includes a connecting bar 31 and a bearing 32. The upper end of the connecting bar 31 is fixedly connected to the lower ends of the disc body 21 and the reinforcing rod 23, and the bearings 32 are symmetrically and fixedly connected to the side ends of the connecting bar 31. The bearings 32 are used to guide the rotation of the swing frame 4.

[0028] Referring to Figure 1 、 3 and 4, the swing frame 4 includes an arc-shaped rod 41 and a rotating shaft 42. The rotating shaft 42 is rotatably installed in the bearing 32. The upper end of the arc-shaped rod 41 is fixedly connected to the middle of the protective frame 8, the worm gear sleeve 7 is fixedly connected to the outside of the rotating shaft 42, and the lower end of the arc-shaped rod 41 is fixedly connected to the side end of the rotating shaft 42. When the rotating shaft 42 rotates in the bearing 32, the arc-shaped rod 41 is driven to swing by the rotating shaft 42, and the protective frame 8 is driven to switch its up and down positions by the arc-shaped rod 41.

[0029] Referring to Figure 3 and 4 , a rotating groove 43 is formed in the middle part of the rotating shaft 42. The bearing 32 is rotatably clamped in the rotating groove 43.

[0030] Working principle: Before falling, the DC motor 1 is used to drive the rotating rod 5 to rotate. The rotating rod 5 drives the worm thread sleeve 6 to rotate. The worm thread sleeve 6 drives the worm gear sleeve 7 to rotate. The worm gear sleeve 7 drives the swing frame 4 to swing. The swing frame 4 drives the protective frame 8 to descend. The first limit block 9 is used to limit the downward turning amplitude of the swing frame 4, so that the swing frame 4 only swings 180 degrees. Thus, the swing frame 4 and the protective frame 8 become landing gears. During takeoff, reverse driving is used to make the protective frame 8 block outside the propeller. The first limit block 9 is used to limit the upward turning amplitude, playing a role in protecting the propeller. By using the dual-purpose mode of the swing frame 4 and the protective frame 8, the overall load is reduced.

[0031] The above is only a preferred specific embodiment of the utility model, but the protection scope of the utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the utility model, according to the technical solution of the utility model and its inventive concept, makes equivalent substitutions or changes, and all should be covered within the protection scope of the utility model.

[0032] In the description, the application directions of the prior art that are known to those skilled in the art and have not been changed are simply mentioned for the utility model, and are combined with the utility model to form a complete technology; the over-popularization of the technologies well-known to those skilled in the art is avoided, which is used to assist those skilled in the art to quickly understand the main content of the utility model.

Claims

1. A safety device for a tandem twin-rotor unmanned helicopter, comprising a true current motor (1), characterized in that: The outer end of the rotor of the true flow motor (1) is symmetrically fixedly connected to a rotating rod (5), the rotating rod (5) and the true flow motor (1) are an integral structure, the outside of the two rotating rods (5) are fixedly connected to a volute sleeve (6), the outside of the two volute sleeves (6) are meshed with a worm gear sleeve (7), the two worm gear sleeves (7) are fixedly mounted with a swing frame (4), the lower part of the swing frame (4) is rotatably mounted with a bearing frame (3), the upper ends of the two swing frames (4) are fixedly connected to a protective frame (8), the outer shell of the true flow motor (1) is fixedly connected to the bearing frame (3), and the outer end of the bearing frame (3) is fixedly connected to a first limit block (9) and a second limit block (10).

2. A tandem twin-rotor unmanned helicopter safety protection device according to claim 1, characterized in that: The upper ends of the true-flow motor (1) and the bearing frame (3) are fixedly connected with a mounting plate (2).

3. A tandem twin-rotor unmanned helicopter safety protection device according to claim 2, characterized in that: The mounting plate (2) comprises a plate body (21), and the upper end of the plate body (21) is hollowed out to form a mounting hole (22).

4. A tandem twin-rotor unmanned helicopter safety device according to claim 3, characterized in that: The mounting plate (2) further comprises a reinforcing rod (23), wherein the reinforcing rod (23) is fixedly connected to the inside of the plate body (21).

5. The safety protection device for a tandem twin-rotor unmanned helicopter according to claim 1, characterized in that: The bearing frame (3) comprises a connecting strip (31) and a bearing (32), wherein the bearing (32) is symmetrically fixedly connected to the side ends of the connecting strip (31).

6. The safety protection device for a tandem twin-rotor unmanned helicopter according to claim 1, characterized in that: The swing frame (4) comprises an arc-shaped rod (41) and a rotating shaft (42), and the lower end of the arc-shaped rod (41) is fixedly connected to the side end of the rotating shaft (42).

7. A tandem twin-rotor unmanned helicopter safety device according to claim 6, characterized in that: A rotation groove (43) is formed at the waist of the rotation shaft (42).

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