Ground end tensioning device for a tethered drone

Abstract

The utility model discloses a ground end tensioner of tethered unmanned plane belongs to unmanned plane auxiliary equipment technical field, wherein ground end tensioner of tethered unmanned plane includes frame, transmission mechanism and tensioning mechanism, and transmission mechanism includes synchronous belt and at least two synchronous wheels, and two synchronous wheels are all rotationally connected with the frame, and the synchronous belt is around and is connected with the outer periphery of synchronous wheel between two synchronous wheels, tensioning mechanism is located between two synchronous wheels, and tensioning mechanism includes tensioning wheel and adjusting member, and adjusting member is connected with the frame, and adjusting member is rotationally connected with tensioning wheel, and adjusting member is configured as drive tensioning wheel to synchronous belt close, make the outer periphery of tensioning wheel and synchronous belt abut, to ensure that synchronous belt is in the tensioned state, to improve the connection stability of synchronous belt and synchronous wheel.

Description

Technical Field

[0001] This utility model relates to the field of unmanned aerial vehicle (UAV) auxiliary equipment technology, and in particular to a ground-end tensioning device for tethered UAVs. Background Technology

[0002] Tethered drones are a branch of drone development. Their main purpose is to use ground power to continuously supply electrical energy to the drone at high altitudes via cables, thereby enabling the drone to stay aloft for extended periods.

[0003] In related technologies, the wiring components of the ground end box of tethered drones are generally driven by a synchronous belt and a synchronous pulley. However, after long-term use, the synchronous belt is prone to plastic deformation, which causes the synchronous belt to be stretched, resulting in loosening and slippage at the connection between the synchronous belt and the synchronous pulley. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a ground-end tensioning device for tethered unmanned aerial vehicles (UAVs) to ensure that the timing belt is in a taut state, thereby improving the connection stability between the timing belt and the timing pulley.

[0005] The ground-end tensioning device for a tethered unmanned aerial vehicle (UAV) according to this embodiment of the present invention includes: a frame; a transmission mechanism including a synchronous belt and at least two synchronous pulleys, both of which are rotatably connected to the frame, the synchronous belt being wound between the two synchronous pulleys and connected to the outer peripheral surface of the synchronous pulleys; and a tensioning mechanism located between the two synchronous pulleys, the tensioning mechanism including a tensioning wheel and an adjusting member, the adjusting member being connected to the frame and rotatably connected to the tensioning wheel, the adjusting member being configured to drive the tensioning wheel closer to the synchronous belt, so that the outer peripheral surface of the tensioning wheel abuts against the synchronous belt.

[0006] The ground-end tensioning device for a tethered drone according to an embodiment of the present invention has at least the following beneficial effects: the transmission mechanism of the ground-end tensioning device for the tethered drone includes a synchronous belt and at least two synchronous pulleys. The two synchronous pulleys can be connected to two transmission components respectively, and the synchronous belt is wound between the two synchronous pulleys and connected to the outer circumferential surface of the synchronous pulleys. Through the transmission action of the synchronous belt, the synchronous rotation of the two synchronous pulleys is realized, that is, the transmission and synchronous action between the two transmission components are realized. The ground-end tensioning device for the tethered drone also includes a tensioning mechanism located between the two synchronous pulleys. The tensioning mechanism includes a tensioning wheel and an adjusting member. The adjusting member is connected to the frame and rotatably connected to the tensioning wheel to drive the tensioning wheel closer to the synchronous belt to maintain the contact between the tensioning wheel and the synchronous belt. The adjusting member can apply pressure to the synchronous belt to keep the synchronous belt in a taut state, which can avoid the problem of slippage or transmission failure caused by the slack of the synchronous belt, thereby improving the connection stability between the synchronous belt and the synchronous pulley.

[0007] According to some embodiments of the present invention, the adjusting component includes a spring, the two ends of which are respectively connected to the frame and the tension wheel to drive the tension wheel closer to the timing belt.

[0008] According to some embodiments of the present invention, the frame has a slide groove, the adjusting component further includes a slider, the slider is slidably connected to the slide groove, the tension wheel is rotatably connected to the slider, and the spring abuts against the end of the slider away from the timing belt.

[0009] According to some embodiments of the present invention, the ground end tensioning device of the tethered drone further includes a limiting rod, which is at least partially inserted into the slide groove, and both ends of the limiting rod are respectively connected to the frame and the slider, and a spring is sleeved on the outer periphery of the limiting rod.

[0010] According to some embodiments of this utility model, the two ends of the limiting rod are respectively provided with limiting blocks and threaded sections. The end of the slide groove away from the synchronous belt is provided with a through hole. The limiting rod passes through the through hole. The limiting block can abut against the outer edge of the through hole facing away from the slide groove. The slider is provided with a threaded hole. The threaded section is threadedly connected to the threaded hole. The end of the spring away from the slider abuts against the bottom wall of the slide groove.

[0011] According to some embodiments of the present invention, the slide groove has a sliding hole connected to the side facing the synchronous belt. The slider includes a first block and a second block. The first block is connected to the end of the second block near the synchronous belt. The first block is embedded in the sliding hole and is slidably connected to the sliding hole. The second block is embedded in the slide groove and is slidably connected to the inner circumferential surface of the slide groove.

[0012] According to some embodiments of the present invention, the ground end tensioning device of the tethered drone also includes a cover plate, and the side of the slide facing away from the timing belt has an opening. The cover plate is detachably connected to the frame to open and close the opening.

[0013] According to some embodiments of the present invention, the ground end tensioning device of the tethered UAV further includes a threaded connector and a bearing. The threaded connector passes through the inner circumferential surface of the bearing and is threadedly connected to the slider. The tensioning wheel is rotatably connected to the outer circumferential surface of the bearing.

[0014] According to some embodiments of the present invention, the outer circumferential surface of the synchronous pulley is provided with a first toothed ring, and the inner circumferential surface of the synchronous belt is provided with a second toothed ring, the first toothed ring meshing with the second toothed ring.

[0015] According to some embodiments of the present invention, the ground-end tensioning device of the tethered drone further includes a cable, a winding reel, a lead screw, and a threading component. Two synchronous pulleys are respectively connected to the winding reel and the lead screw. The threading component is connected to the lead screw and is configured to slide back and forth along the lead screw. The cable passes through the threading component and one end of it is connected to the winding reel.

[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0018] Figure 1 This is a schematic diagram of the ground-end tensioning device of a tethered unmanned aerial vehicle according to an embodiment of the present invention;

[0019] Figure 2 This is a side view of the ground-end tensioning device of a tethered unmanned aerial vehicle according to an embodiment of the present invention;

[0020] Figure 3 This is a side view of the tensioning wheel of the ground-end tensioning device of a tethered drone according to an embodiment of the present invention, showing it moving towards the timing belt.

[0021] Figure 4 for Figure 1 The image shows a partial enlarged view of point A on the ground-end tensioning device of the tethered drone.

[0022] Figure 5 This is a schematic diagram of the ground-end tensioning device (omitted winding reel) of a tethered drone according to another embodiment of the present invention;

[0023] Figure 6 This is a structural schematic diagram from another perspective of the ground-end tensioning device (omitting the winding reel and cover plate) of a tethered drone according to an embodiment of the present invention.

[0024] Icon labels:

[0025] 100. Frame; 110. Slide groove; 120. Sliding hole;

[0026] 200. Transmission mechanism; 210. Synchronous pulley; 220. Synchronous belt;

[0027] 300. Tensioning mechanism; 310. Limiting rod; 311. Limiting block; 312. Threaded section; 320. Spring; 330. Slider; 331. First block; 332. Second block; 340. Tensioning wheel; 350. Bearing; 360. Threaded connector; 370. Cover plate;

[0028] 400. Winding reel;

[0029] 500. Lead screw;

[0030] 600. Threading component; 610. Roller. Detailed Implementation

[0031] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0032] In the description of this utility model, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0033] In the description of this utility model, "multiple" refers to two or more. The use of "first" and "second" is for distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features or their sequential relationship.

[0034] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0035] Reference Figures 1 to 6 As shown, this utility model discloses a ground-end tensioning device for a tethered drone according to an embodiment. This device can be applied to the ground-end housing of the tethered drone. Since the ground-end housing needs to connect the drone and power source via cables to achieve continuous power supply for high-altitude operations, it is equipped with a winding reel 400 and a cable threading component 600 to achieve cable winding, unwinding, and guidance. The ground-end tensioning device ensures the synchronous transmission between the winding reel 400 and the cable threading component 600. Specifically, the ground-end tensioning device includes a frame 100, a transmission mechanism 200, and a tensioning mechanism 300.

[0036] Reference Figure 1 , Figure 5 and Figure 6 As shown, the transmission mechanism 200, tensioning mechanism 300, winding reel 400 and threading member 600 are all connected to the frame 100. The frame 100 can provide support for the transmission mechanism 200, tensioning mechanism 300, winding reel 400 and threading member 600 and reduce the impact on the transmission mechanism 200, tensioning mechanism 300, winding reel 400 and threading member 600 from the outside.

[0037] Reference Figure 1 , Figure 2 and Figure 3 As shown, the transmission mechanism 200 includes a synchronous belt 220 and at least two synchronous pulleys 210. The two synchronous pulleys 210 are rotatably connected to the frame 100, and are respectively connected to the winding reel 400 and the threading member 600. The synchronous belt 220 is wound between the two synchronous pulleys 210 and connected to the outer circumferential surface of the synchronous pulleys 210. Through the transmission action of the synchronous belt 220, the synchronous rotation of the two synchronous pulleys 210 is realized, thereby realizing the transmission and synchronous action between the winding reel 400 and the threading member 600.

[0038] Reference Figure 1 , Figure 2 and Figure 3 As shown, the ground-end tensioning device of the tethered UAV is equipped with a tensioning mechanism 300. The tensioning mechanism 300 is located between two synchronous pulleys 210. The tensioning mechanism 300 includes a tensioning pulley 340 and an adjusting component. The adjusting component is connected to the frame 100 and rotatably connected to the tensioning pulley 340 to drive the tensioning pulley 340 closer to the synchronous belt 220, so as to maintain the contact between the tensioning pulley 340 and the synchronous belt 220. The adjusting component can apply pressure to the synchronous belt 220 so that the synchronous belt 220 is kept in a taut state, which can avoid the problem of slippage or transmission failure caused by the slack of the synchronous belt 220, thereby improving the connection stability between the synchronous belt 220 and the synchronous pulley 210.

[0039] Reference Figure 1 , Figure 2 and Figure 3 As shown, as the synchronous belt 220 rotates, the tensioning pulley 340 can rotate along with the synchronous belt 220, thereby reducing the obstruction caused by the tensioning pulley 340 to the rotation of the synchronous belt 220, and ensuring the accuracy of the transmission between the two synchronous pulleys 210.

[0040] Reference Figure 1 , Figure 3 and Figure 4 As shown, it can be understood that the adjusting component includes a spring 320, the two ends of which are connected to the frame 100 and the tension wheel 340 respectively, to drive the tension wheel 340 closer to the timing belt 220.

[0041] Reference Figure 1 , Figure 3 and Figure 4 As shown, in the initial state, the spring 320 is in a compressed state, so the spring 320 has a tendency to extend. The two ends of the spring 320 are connected to the frame 100 and the tension wheel 340 respectively. Under the action of the elastic force of the spring 320, the tension wheel 340 can be driven to move closer to the synchronous belt 220, that is, to maintain the rolling connection between the tension wheel 340 and the synchronous belt 220.

[0042] Reference Figure 1 , Figure 2 and Figure 4 As shown, when the synchronous belt 220 is stretched, under the elastic action of the spring 320, the spring 320 can drive the tension wheel 340 to press down towards the synchronous belt 220, so that the synchronous belt 220 remains taut. That is, the ground-end tensioning device of this tethered UAV can still work normally after the synchronous belt 220 is deformed after long-term use, which can improve the normal working life of the transmission mechanism 200. Moreover, the tension of the synchronous belt 220 can be maintained by the automatic adjustment of the elastic force of the spring 320, without the need to disassemble the transmission mechanism 200 for adjustment or make manual adjustments, making it simpler and more convenient to use.

[0043] It should be understood that in some other embodiments, the adjusting component is a linear drive mechanism such as an electric push rod, a pneumatic push rod, a hydraulic push rod, or a lead screw and slider mechanism. The adjusting component can drive the tensioning wheel 340 to move closer to or further away from the synchronous belt 220. While keeping the tensioning wheel 340 in contact with the synchronous belt 220, the pressure applied by the tensioning wheel 340 to the synchronous belt 220 can be adjusted without disassembling the machine, so as to ensure that the synchronous belt 220 is in a taut state and to ensure the connection stability between the synchronous belt 220 and the synchronous pulley 210.

[0044] Reference Figure 1 , Figure 5 and Figure 6 As shown, it can be understood that the frame 100 has a groove 110, the adjusting component also includes a slider 330, the slider 330 is slidably connected to the groove 110, the tension wheel 340 is rotatably connected to the slider 330, and the spring 320 abuts against the end of the slider 330 away from the timing belt 220.

[0045] Reference Figure 1 , Figure 2 and Figure 3 As shown, specifically, both the slide groove 110 and the tensioning mechanism 300 are located above the synchronous belt 220. Under the weight of its own, the tensioning pulley 340 tends to move closer to the synchronous belt 220, ensuring that the tensioning pulley 340 applies pressure to the synchronous belt 220 and ensuring the rolling connection between the tensioning pulley 340 and the synchronous belt 220. The slider 330 is slidably connected to the slide groove 110. Through the mutual limiting between the outer peripheral surface of the slider 330 and the inner surface of the slide groove 110, the rotation of the slider 330 can be restricted, thereby limiting the movement of the slider 330 to the length direction of the slide groove 110. That is, the slide groove 110 can guide the slider 330 so that the tensioning pulley 340 moves in a straight line.

[0046] It should be understood that in some other embodiments, both the slide groove 110 and the tensioning mechanism 300 are located below the synchronous belt 220. Under the elastic action of the spring 320, the tensioning wheel 340 tends to move closer to the synchronous belt 220, ensuring that the tensioning wheel 340 applies pressure to the synchronous belt 220 and ensuring the rolling connection between the tensioning wheel 340 and the synchronous belt 220. The slider 330 is slidably connected to the slide groove 110. Through the mutual limiting between the outer peripheral surface of the slider 330 and the inner surface of the slide groove 110, the rotation of the slider 330 can be restricted, thereby limiting the movement of the slider 330 to the length direction of the slide groove 110. That is, the slide groove 110 can guide the slider 330 so that the tensioning wheel 340 moves in a straight line.

[0047] Reference Figure 1 , Figure 4 and Figure 5 As shown, it can be understood that in this embodiment, in order to further improve the straightness of the extension and retraction of the spring 320, the ground end tensioning device of the tethered UAV also includes a limiting rod 310. The limiting rod 310 is at least partially inserted into the slide groove 110, and the two ends of the limiting rod 310 are respectively connected to the frame 100 and the slider 330. The spring 320 is sleeved on the outer periphery of the limiting rod 310.

[0048] Reference Figure 1 , Figure 4 and Figure 5 As shown, the limiting rod 310 is at least partially inserted into the slide groove 110, and the spring 320 is sleeved on the outer periphery of the limiting rod 310. Through the mutual limiting between the inner circumferential surface of the spring 320 and the outer circumferential surface of the limiting rod 310, the limiting rod 310 can guide the extension and retraction of the spring 320, thereby restricting the extension and retraction of the spring 320 to the length direction of the limiting rod 310. The two ends of the spring 320 are respectively connected to the frame 100 and the slider 330, thereby improving the straightness of the movement of the tension wheel 340 connected to the slider 330, thereby improving the accuracy and straightness of the adjustment of the tension wheel 340 by the adjusting component.

[0049] Reference Figure 1 , Figure 4 and Figure 5 As shown, it can be understood that the two ends of the limiting rod 310 are respectively provided with limiting blocks 311 and threaded sections 312. The end of the slide groove 110 away from the synchronous belt 220 is provided with a through hole. The limiting rod 310 passes through the through hole. The limiting block 311 is located outside the slide groove 110, and the outer dimension of the limiting block 311 is larger than the inner diameter of the through hole, so that the limiting block 311 can abut against the outer edge of the end of the through hole facing away from the slide groove 110. The two ends of the slide groove 110 are arranged in the vertical direction. The through hole is located at the upper end of the slide groove 110, and the limiting block 311 can abut against the outer edge of the upper end of the through hole, thereby limiting the extreme downward movement of the limiting rod 310.

[0050] Reference Figure 1 , Figure 4 and Figure 5 As shown, specifically, the slider 330 is provided with a threaded hole, and the threaded section 312 is threadedly connected to the threaded hole. The end of the spring 320 away from the slider 330 abuts against the bottom wall of the slide groove 110, thereby achieving a fixed connection between the limiting rod 310 and the slider 330. The mutual limiting of the through hole and the limiting rod 310 can also improve the straightness of the slider 330's sliding. The limiting rod 310 can be detachably connected to the slider 330 through the threaded section 312, which simplifies the manufacturing and assembly of the tensioning mechanism 300 and helps reduce the manufacturing cost of the ground-end tensioning device of this tethered UAV.

[0051] Reference Figure 1 , Figure 4 and Figure 5 As shown, the two ends of the spring 320 abut against the upper wall of the slide groove 110 and the upper wall of the slider 330, respectively. Under the elastic action of the spring 320, the slider 330 can be driven to move downward along the slide groove 110 to maintain the contact between the tension wheel 340 connected to the slider 330 and the synchronous belt 220. This allows the tension wheel 340 to maintain the pressure applied to the synchronous belt 220. When the synchronous belt 220 is stretched, the tension wheel 340 can achieve adaptive adjustment. Under the pressure applied by the tension wheel 340, the synchronous belt 220 is kept taut to ensure the transmission synchronization of the two synchronous pulleys 210. This helps to avoid the problem of transmission failure between the synchronous pulley 210 and the synchronous belt 220.

[0052] Reference Figure 1 , Figure 4 and Figure 5 As shown, it can be understood that the sliding groove 110 is connected to the sliding hole 120 on the side facing the synchronous belt 220. The two ends of the sliding hole 120 are set in the vertical direction, that is, the length direction of the sliding hole 120 is the vertical direction.

[0053] Reference Figure 1 , Figure 4 and Figure 5 As shown, the slider 330 includes a first block 331 and a second block 332. The first block 331 and the second block 332 are stacked and connected along their thickness direction. The first block 331 is connected to one end of the second block 332 near the synchronous belt 220. The first block 331 is embedded in the sliding hole 120 and is slidably connected to the sliding hole 120. The second block 332 is embedded in the sliding groove 110 and is slidably connected to the inner circumferential surface of the sliding groove 110.

[0054] Reference Figure 1 , Figure 4 and Figure 5As shown, the ground-end tensioning device of the tethered UAV is connected to the sliding hole 120 by the sliding connection of the first block 331 and the sliding connection of the second block 332 to the inner circumferential surface of the slide groove 110. This can improve the sliding stability of the slider 330, ensure the sliding straightness of the tensioning wheel 340 connected to the slider 330, and limit the rotation of the second block 332 by the mutual limiting of the inner circumferential surface of the slide groove 110, so as to make the sliding of the second block 332 more stable.

[0055] Reference Figure 1 , Figure 4 and Figure 5 As shown, it is understood that, considering the subsequent maintenance or repair of the tensioning mechanism 300, the ground-end tensioning device of the tethered UAV also includes a cover plate 370, the side of the slide 110 facing away from the timing belt 220 has an opening, and the cover plate 370 is detachably connected to the frame 100.

[0056] Reference Figure 1 , Figure 4 and Figure 5 As shown, when the user needs to assemble the tensioning mechanism 300 and the frame 100, the user can first pass the limiting rod 310 through the through hole, and put the spring 320 on the outer periphery of the limiting rod 310, and put the slider 330 into the slide groove 110, so that the first block 331 is embedded in the sliding hole 120 and is slidably connected to the sliding hole 120, and the second block 332 is embedded in the slide groove 110 and is slidably connected to the inner periphery of the slide groove 110. Then, the threaded section 312 of the limiting rod 310 is threadedly connected to the screw hole at the upper end of the slider 330, thereby realizing the threaded connection between the limiting rod 310 and the slider 330. Then, the user can cover the opening of the slide groove 110 with the cover plate 370 and connect it with screws, thereby realizing the detachable connection between the cover plate 370 and the frame 100. Then, the tensioning wheel 340 can be rotatably connected to the first block 331.

[0057] Reference Figure 1 , Figure 4 and Figure 5 As shown, when the user needs to separate the tensioning mechanism 300 from the frame 100, the user can loosen the screws to separate the cover plate 370 from the frame 100, exposing the end of the slide groove 110 facing away from the synchronous belt 220, separating the tensioning wheel 340 from the first block 331, and then rotating the limiting rod 310 to separate the threaded section 312 of the limiting rod 310 from the screw hole at the upper end of the slider 330, thereby separating the slider 330 from the limiting rod 310. This allows the slider 330 to be removed from the slide groove 110 and the limiting rod 310 to be removed from the through hole, thus separating the limiting rod 310 from the spring 320, completing the separation of the tensioning mechanism 300 from the frame 100.

[0058] Reference Figure 1 , Figure 4 and Figure 5 As shown, it is understandable that in order to achieve the rotational connection between the tension wheel 340 and the slider 330 and to maintain the smooth rotation of the tension wheel 340 and the slider 330, the ground-end tensioning device of the tethered UAV also includes a threaded connector 360 and a bearing 350. The threaded connector 360 passes through the inner circumferential surface of the bearing 350 and is threadedly connected to the slider 330. The tension wheel 340 is rotatably connected to the outer circumferential surface of the bearing 350. That is, the tension wheel 340 is rotatably connected to the slider 330 through the bearing 350. Under the connection action of the bearing 350, the problem of the tension wheel 340 getting stuck can be effectively avoided, thereby ensuring the rolling connection between the tension wheel 340 and the timing belt 220.

[0059] Reference Figure 1 , Figure 2 and Figure 3 As shown, it can be understood that in order to improve the connection stability between the synchronous belt 220 and the synchronous pulley 210, the outer circumferential surface of the synchronous pulley 210 is provided with a first toothed ring, and the inner circumferential surface of the synchronous belt 220 is provided with a second toothed ring. When the synchronous belt 220 is wound between the two synchronous pulleys 210, the first toothed ring and the second toothed ring mesh, thereby ensuring a stable connection between the synchronous belt 220 and the synchronous pulley 210, and ensuring the transmission stability between the synchronous belt 220 and the synchronous pulley 210.

[0060] Reference Figure 1 , Figure 5 and Figure 6 As shown, it can be understood that the ground-end tensioning device of the tethered UAV also includes a cable, a winding reel 400, a lead screw 500, and a threading member 600. Two frames 100 are provided, which are parallel to each other and respectively located at both ends of the winding reel 400. One end of the winding reel 400 is connected to a synchronous wheel 210 at one of the frames 100, and the other end of the winding reel 400 is rotatably connected to the other frame 100. One end of the lead screw 500 is connected to another synchronous wheel 210 at one of the frames 100, and the other end of the lead screw 500 is rotatably connected to the other frame 100. The threading member 600 is located on the lead screw 500 and connected to the lead screw 500. The threading member 600 is configured to be able to reciprocate along the lead screw 500.

[0061] Reference Figure 1 , Figure 5 and Figure 6As shown, specifically, the threading component 600 includes a movable block, a snap-fit ​​block, a guide rod, and two rollers 610. The guide rod is parallel to the lead screw 500, and both ends of the guide rod are fixedly connected to the two frames 100 respectively. The movable block is provided with a first through hole and a second through hole. The guide rod passes through the first through hole, while the lead screw 500 passes through the second through hole. The second through hole is located above the first through hole. The movable block is also provided with a receiving groove communicating with the second through hole. The snap-fit ​​block is located in the receiving groove. The outer periphery of the lead screw 500 is provided with two interconnected spiral grooves with opposite rotation directions. One end of the snap-fit ​​block is located in the spiral groove and can move between the two spiral grooves. The two rollers 610 are rotatably connected to the movable block respectively. The outer periphery of the rollers 610 is provided with a groove, and a threading space is constructed between the grooves of the two rollers 610.

[0062] Reference Figure 1 , Figure 5 and Figure 6 As shown, one end of the cable passes through the cable threading space and is connected to the winding reel 400, while the other end of the cable can be connected to the drone to provide power to the drone. When the winding reel 400 winds or unwinds the cable, the synchronous belt 220 drives the two synchronous pulleys 210 to rotate, which in turn drives the lead screw 500 to rotate synchronously. This causes the moving block to move back and forth in a straight line along the lead screw 500. The two rollers 610 guide the unwinding and winding of the cable, making the unwinding and winding of the cable more regular and avoiding the problem of cable tangling or messy accumulation.

[0063] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A ground-end tensioning device for a tethered unmanned aerial vehicle (UAV), characterized in that, include: Frame (100); The transmission mechanism (200) includes a synchronous belt (220) and at least two synchronous pulleys (210), both of which are rotatably connected to the frame (100), and the synchronous belt (220) is wound between the two synchronous pulleys (210) and connected to the outer peripheral surface of the synchronous pulleys (210). A tensioning mechanism (300) is located between the two synchronous pulleys (210). The tensioning mechanism (300) includes a tensioning pulley (340) and an adjusting member. The adjusting member is connected to the frame (100) and is rotatably connected to the tensioning pulley (340). The adjusting member is configured to drive the tensioning pulley (340) closer to the synchronous belt (220) so that the outer circumferential surface of the tensioning pulley (340) abuts against the synchronous belt (220).

2. The ground-end tensioning device for a tethered unmanned aerial vehicle according to claim 1, characterized in that: The adjusting component includes a spring (320), the two ends of which are connected to the frame (100) and the tension wheel (340) respectively, so as to drive the tension wheel (340) closer to the timing belt (220).

3. The ground-end tensioning device for a tethered unmanned aerial vehicle according to claim 2, characterized in that: The frame (100) has a groove (110), and the adjusting member further includes a slider (330), the slider (330) being slidably connected to the groove (110), the tensioning wheel (340) being rotatably connected to the slider (330), and the spring (320) abutting against the end of the slider (330) away from the timing belt (220).

4. The ground-end tensioning device for a tethered unmanned aerial vehicle according to claim 3, characterized in that: It also includes a limiting rod (310), which is at least partially inserted into the slide groove (110), and the two ends of the limiting rod (310) are respectively connected to the frame (100) and the slider (330), and the spring (320) is sleeved on the outer periphery of the limiting rod (310).

5. The ground-end tensioning device for a tethered unmanned aerial vehicle according to claim 4, characterized in that, The limiting rod (310) has a limiting block (311) and a threaded section (312) at both ends. The end of the slide groove (110) away from the synchronous belt (220) has a through hole. The limiting rod (310) passes through the through hole. The limiting block (311) can abut against the outer edge of the end of the through hole facing away from the slide groove (110). The slider (330) has a threaded hole. The threaded section (312) is threadedly connected to the threaded hole. The end of the spring (320) away from the slider (330) abuts against the bottom wall of the slide groove (110).

6. The ground-end tensioning device for a tethered unmanned aerial vehicle according to claim 3, characterized in that, The groove (110) has a sliding hole (120) connected to the side facing the synchronous belt (220). The slider (330) includes a first block (331) and a second block (332). The first block (331) is connected to the end of the second block (332) near the synchronous belt (220). The first block (331) is embedded in the sliding hole (120) and is slidably connected to the sliding hole (120). The second block (332) is embedded in the groove (110) and is slidably connected to the inner circumferential surface of the groove (110).

7. The ground-end tensioning device for a tethered unmanned aerial vehicle according to claim 3, characterized in that: It also includes a cover plate (370), the slide (110) having an opening on the side opposite to the timing belt (220), the cover plate (370) being detachably connected to the frame (100) to open and close the opening.

8. The ground-end tensioning device for a tethered unmanned aerial vehicle according to claim 3, characterized in that: It also includes a threaded connector (360) and a bearing (350), wherein the threaded connector (360) passes through the inner circumferential surface of the bearing (350) and is threadedly connected to the slider (330), and the tensioning wheel (340) is rotatably connected to the outer circumferential surface of the bearing (350).

9. The ground-end tensioning device for a tethered unmanned aerial vehicle according to claim 1, characterized in that: The outer circumferential surface of the synchronous pulley (210) is provided with a first toothed ring, and the inner circumferential surface of the synchronous belt (220) is provided with a second toothed ring, the first toothed ring meshing with the second toothed ring.

10. The ground-end tensioning device for a tethered unmanned aerial vehicle according to claim 1, characterized in that: It also includes a cable, a winding reel (400), a lead screw (500), and a threading member (600). Two synchronous pulleys (210) are connected to the winding reel (400) and the lead screw (500) respectively. The threading member (600) is connected to the lead screw (500) and is configured to slide back and forth along the lead screw (500). The cable passes through the threading member (600) and one end of the cable is connected to the winding reel (400).

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