Splicing type mooring unmanned aerial vehicle cable take-up and pay-off device

Abstract

The utility model relates to a splicing type mooring unmanned aerial vehicle cable take-up and pay-off device which comprises a base, a winding reel, a cable arranging device, a servo motor and a transmission device. The base part comprises a square base plate, two winding reel supports, two motor supports and two winding reel supports which are mutually fixed in a bolt connection mode. The winding reel is formed by combining two blades and seven shafts and accommodates a cable in a winding manner. The wire arranging device is arranged on a side supporting plate of the base and comprises a reciprocating lead screw and two guide rods, a wire passing ring is fixed to a guide piece, and a movable U-shaped piece at the lower end of the guide piece is matched with a groove of the lead screw to do reciprocating motion so that a winding reel can take up wires evenly. The conveying device is composed of four gears and two conveying belts, and the mooring lines are evenly arranged through the reasonable gear transmission ratio. The servo motor is driven by adopting a flexible control strategy, so that the winding mechanism can complete quick and accurate take-up and pay-off actions, winding or stacking of cables is avoided, the overall mechanism is hollowed out, heat dissipation is reasonable, and stable flight of the mooring unmanned aerial vehicle can be guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of tethered unmanned aerial vehicles, in particular to a spliced ​​tethered unmanned aerial vehicle retracting and releasing cable device. Background Art

[0002] A tethered drone is a floating drone that is physically connected to a ground station via a tether rope. Compared to ordinary wireless drones, since its cables concentrate power and communication cables, it can provide continuous power supply, greatly increase the flight time, and achieve efficient, long-lasting, and stable flight. The cable retracting device is a component of the ground station, which is used to retract and release the tether rope when the drone takes off and lands, helping the drone to take off and land smoothly.

[0003] Traditional cable retracting and releasing devices are mostly used in wire and wire rope production workshops. They are large and bulky and are not suitable for small and medium-sized tethered drones. The structure of traditional cable retracting and releasing devices is one-piece and not convenient to disassemble. The cables are tightly arranged and the heat dissipation performance is insufficient. These designs cannot meet the technical requirements of new tethered drones. Utility Model Content

[0004] In view of the shortcomings of the prior art, the utility model provides a spliced ​​tethered drone cable retracting and releasing device, which solves the shortcomings of the prior tethered drone cable retracting and releasing devices, such as inconvenient loading and unloading and insufficient heat dissipation performance.

[0005] To achieve the above purpose, the utility model provides the following technical solutions: a spliced ​​tethered drone cable retracting and releasing device, comprising a base, which is spliced ​​by a base and four brackets, and the various parts of the base are bolted to each other, which is convenient for disassembly, and a servo motor bracket is also installed on the base to support the servo motor to prevent excessive shear force at the bolt connection between the servo motor and the motor bracket;

[0006] The winding drum is composed of two blades and seven shafts. The blades are provided with fan-shaped grooves, which, combined with the overall hollow structure, are more convenient for heat dissipation of the mooring cable;

[0007] The wire arrangement device includes two symmetrically distributed brackets, which are respectively connected to the motor bracket. The brackets are provided with three holes for installing the reciprocating screw rod and two parallel guide rods. The guide rods are provided with guide plates, the upper end of which is provided with a wire passing ring, and the lower end of which is provided with a movable U-shaped plate, which cooperates with the groove of the reciprocating screw rod to achieve the purpose of cyclic and uniform wire arrangement.

[0008] Servo drive motor, the servo motor selection power is 750KW, which can meet the winding requirements of small and medium-sized tethered drones;

[0009] The transmission device comprises a servo motor gear, a reciprocating screw rod gear, two winding drum bearing gears, and a synchronous belt that cooperates with the two pairs of gears. The gears are connected to the shaft through a rectangular gear key.

[0010] Furthermore, in order to ensure the reliable strength of the base part, the base and the four support plates of the base are provided with flanges to ensure that the strength of the overall structure meets the standards.

[0011] Furthermore, in order to ensure that the wire arrangement device can arrange the wire evenly, the transmission ratio of the reciprocating screw gear and the drum shaft gear is 2:1, and the pitch of the helical line of the reciprocating screw groove can achieve cyclic and uniform wire arrangement.

[0012] Furthermore, in order to ensure heat dissipation, the overall structure adopts a hollow design. The reel fan blades and the reel bracket are both provided with fan-shaped grooves, and there are seven axes in the middle of the reel. Combined with the density of the cable arrangement, the heat generated during the operation of the mooring cable can be dissipated well.

[0013] Furthermore, in order to ensure the cyclic operation of the reciprocating screw, the U-shaped piece at the lower end of the guide piece of the wire arrangement device can rotate, and the thickness of the U-shaped piece is only 1 / 3 of the width of the groove of the reciprocating screw.

[0014] The beneficial effects of the utility model are:

[0015] 1. Under the cooperation of the servo motor and the winding drum, the servo motor drives the winding drum to rotate, and the collection line is collected to ensure the stability of the collection line.

[0016] 2. Cooperate with the cable arrangement device, utilize the cooperation of the reciprocating screw rod and the cable drum to ensure that the speed of retracting and releasing the cable is always consistent with the movement of the drone during the ascent, landing and level flight of the drone, thereby improving the safety of operation.

[0017] 3. During normal working, the hollow design of the spliced ​​tethered drone retractable cable device can help the tethered cable dissipate heat and increase the service life of the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings required to be used in the embodiments are briefly introduced below.

[0019] Figure 1 It is a structural schematic diagram of a spliced ​​type tethered drone retracting and releasing cable device according to an embodiment of the utility model;

[0020] Figure 2 It is a schematic diagram of a cable arrangement mechanism of a spliced ​​type tethered drone cable retracting and releasing device according to an embodiment of the utility model;

[0021] In the picture

[0022] 1. Servo motor; 2. Base; 3. Servo motor base; 4. Motor bracket; 5. Guide plate; 6. Wire passing ring; 7. Reciprocating screw rod; 8. Wire arrangement device bracket; 9. Guide rod; 10. Bobbin bracket; 11. Bobbin; 12. Motor bracket; 13. Servo motor gear; 14. Synchronous belt between motor and bobbin; 15. Reciprocating screw rod gear; 16. Synchronous belt between reciprocating screw rod and bobbin; 17. Bobbin bearing gear matching with reciprocating screw rod; 18. Bobbin bearing gear matching with servo motor; 19. Bobbin center shaft; 20. Movable U-shaped piece. DETAILED DESCRIPTION

[0023] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0024] like Figure 1 As shown, the spliced ​​tethered drone cable retracting and releasing device described in the utility model includes a base, a winding drum, a cable arrangement device, a servo motor, and a transmission device;

[0025] The base includes a base 2, on which a servo motor base 3 is mounted, and the motor base plays a supporting role to reduce the shear stress at the connection between the motor bracket and the servo motor; the base 2 includes two symmetrically distributed motor brackets 4 and 12, and the motor bracket 4 is provided with a circular hole connected to the servo motor 1; the base includes two symmetrically distributed winding drum brackets 10, and the winding drum brackets 10 wrap the winding drum 11;

[0026] The winding drum 11 includes two blades and seven shafts. A rectangular groove is provided at one end of the middle main shaft, which cooperates with the keys of the transmission gears 17 and 18. The remaining six shafts play a supporting role and are used to wind the mooring cable. There is a gap between the winding drum blades and the winding drum bracket 10.

[0027] The wire arrangement device comprises two symmetrically distributed brackets 8, which are respectively connected to the motor brackets 4 and 12, and the brackets are provided with three holes for installing the reciprocating screw rod 7 and two parallel guide rods 9, and the guide rods are provided with guide pieces 5, the upper end of the guide piece 5 is provided with a wire passing ring 6, and the lower end is provided with a movable U-shaped piece 20 which cooperates with the groove of the reciprocating screw rod 7;

[0028] The servo motor has a power of 750KW, and can well meet the requirements of the retracting and releasing line of the tethered drone through the dual closed-loop control of torque and speed;

[0029] The transmission device includes a servo motor gear 13, a reciprocating screw rod gear 15, a winding drum bearing gears 17 and 18, and synchronous belts 14 and 16 that cooperate with the two pairs of gears; the gears and the shaft are connected by a rectangular gear key; the transmission ratio of the reciprocating screw rod gear and the winding drum shaft gear is 2:1, and the pitch of the reciprocating screw rod groove spiral line can achieve cyclic and uniform wire arrangement.

[0030] During the application process:

[0031] The cable is wound on the reel 11, and one end of the cable is passed through the wire ring 6 on the cable arrangement device; after the tethered drone takes off, the cable is pulled to start the servo motor 1, and the servo motor 1 drives the reel 11 to rotate and send out the cable, so that the drone can be released smoothly.

[0032] When the drone is not landing, the servo motor 1 is started to reverse and the winding drum 11 is rotated to collect the cable. At the same time, the winding drum gear 17 drives the reciprocating screw gear 15 to rotate. When the reciprocating screw rotates, the wire ring 6 reciprocates under the drive of the movable U-shaped piece 20 in the groove of the reciprocating screw, so as to complete the uniform cable arrangement and avoid the cable tangling. In addition, the automatic retracting and releasing of the cable can be realized by controlling the speed of the servo motor and the synchronous control of the take-off and landing of the tethered drone.

[0033] In summary, the spliced ​​tethered drone cable retraction and release device described in the utility model has the advantages of easy installation, good heat dissipation, and a high degree of automation. It will not affect the normal flight of the drone due to the knotting of the tethered cables in the traditional manual retraction and release method. At the same time, it avoids the tethered cables from being densely coiled in a closed and narrow space, greatly reducing the temperature of the tethered cables. The entire device is safe, reliable, and easy to use.

[0034] In order to facilitate multiple disassembly and assembly, further, the entire base body is composed of a base and four supports spliced ​​together, and the connection method is the common bolt connection.

[0035] To facilitate heat dissipation, the overall structure adopts a hollow design. The reel fan blades and the reel bracket 10 are both provided with fan-shaped grooves, and there are seven axes in the middle of the reel 11. Combined with the density of the cable arrangement, the heat generated during the operation of the mooring cable can be well dissipated.

[0036] To avoid damage, the winding drum support is provided with a flange that can completely wrap the winding drum fan blade.

Claims

1. A spliced ​​tethered drone cable retracting and releasing device, characterized in that The invention comprises a base, a winding drum (11), a wire arrangement device, a servo motor (1), and a transmission device; the base comprises a base (2), on which a servo motor base (3) is mounted; the base (2) comprises two symmetrically distributed motor brackets (4) and (12), the motor bracket (4) being provided with a circular hole connected to the servo motor (1); the base comprises two symmetrically distributed winding drum brackets (10); the winding drum (11) comprises two fan blades and seven shafts; the wire arrangement device comprises two symmetrically distributed brackets (8), which are respectively connected to the motor brackets (4) and (12). ), and the bracket is provided with three holes for installing a reciprocating screw rod (7) and two parallel guide rods (9), and the guide rod is provided with a guide plate (5), the upper end of the guide plate (5) is provided with a wire passing ring (6), and the lower end is provided with a movable U-shaped plate (20) which cooperates with the groove of the reciprocating screw rod (7); the transmission device includes a servo motor gear (13), a reciprocating screw rod gear (15), a winding drum bearing outer gear (17) and a winding drum bearing inner gear (18), and a synchronous belt (14) and (16) which cooperate with the two pairs of gears, and the gears are connected to the shaft through a rectangular gear key.

2. A spliced ​​type tethered drone cable retracting and releasing device according to claim 1, characterized in that: The base (2), motor brackets (4) and (12), and winding drum bracket (10) all include flange structures to enhance structural strength.

3. The spliced ​​type tethered drone cable retracting and releasing device according to claim 1, characterized in that: The reciprocating screw rod (7) comprises two mutually interlaced spiral grooves, and can complete reciprocating motion by cooperating with the movable U-shaped piece (20) at the lower end of the guide piece (5).

4. The spliced ​​type tethered drone cable retracting and releasing device according to claim 1, characterized in that: The transmission ratio between the servo motor gear (13) and the winding drum bearing internal gear (18) in the transmission device is 1:3, and the transmission ratio between the reciprocating screw rod gear (15) and the winding drum bearing external gear (17) is 2:

1. The transmission ratios can meet the requirements for uniform wire arrangement.

5. The spliced ​​type tethered drone cable retracting and releasing device according to claim 1, characterized in that: The winding drum support (10) and the winding drum (11) are both hollow structures, which facilitates heat dissipation of the cable.

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