Single-motor power transmission structure

Abstract

The utility model discloses a single-motor power transmission structure which comprises a middle shaft assembly, a power assembly and a gear assembly, wherein the power assembly and the gear assembly are arranged on the middle shaft assembly. The gear assembly comprises a first gear, a second gear and a third gear, the first gear and the second gear are arranged on the middle shaft assembly, the third gear is arranged on the power assembly, transmission assemblies are arranged on the second gear and the third gear, the second gear is connected with the third gear in a meshed mode, one end of the power assembly is connected with the first gear in a meshed mode, and the other end of the power assembly is connected with the second gear in a meshed mode. The power assembly drives the first gear to rotate in the first direction, meanwhile, the transmission assembly drives the third gear to rotate in the first direction, and then the second gear is driven to rotate in the second direction. The single motor is arranged to drive the first gear and the second gear to rotate in the opposite directions, the function that the paddles arranged on the first gear and the second gear rotate oppositely is achieved, the navigation energy is reduced through the arrangement of the single motor, and the endurance time of the unmanned aerial vehicle is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of UAV motors, and in particular to a single-motor power transmission structure. Background Art

[0002] In drone propulsion systems, motors are key components that convert electrical energy into mechanical energy. Their primary function is to generate rotational torque, driving the propellers and thus enabling flight. Brushless motors are a common type of motor used in drones, offering advantages such as high efficiency, low maintenance, and a long lifespan.

[0003] Compared to single-propeller drones, coaxial twin-propeller drones eliminate counter-torque, allowing them to better adapt to complex and changing aerial environments and achieve higher flight efficiency. Coaxial twin-propeller drones have two propeller blades located in the same plane, one above the other. Two motors drive the propellers in different directions, controlling the drone's roll balance and precise heading control.

[0004] However, due to the limited battery capacity of the drone, the dual motors' forward and reverse propeller rotation increases power consumption, reduces the drone's flight time, and significantly affects its endurance. Utility Model Content

[0005] Based on this, the purpose of this utility model is to provide a single-motor power transmission structure, aiming to solve the problem that the current dual-motor forward and reverse propeller rotation reduces the flight time of the drone.

[0006] To achieve the above-mentioned object, the present invention is implemented through the following technical solutions: a single-motor power transmission structure, comprising a central shaft assembly, a power assembly and a gear assembly provided on the central shaft assembly;

[0007] The gear assembly includes a first gear and a second gear provided on the central shaft assembly, and a third gear provided on the power assembly. A transmission assembly is provided on the second gear and the third gear. The second gear and the third gear are meshed and connected. One end of the power assembly is meshed and connected with the first gear. The power assembly drives the first gear to rotate in a first direction, and at the same time drives the third gear to rotate in the first direction through the transmission assembly, thereby driving the second gear to rotate in the second direction.

[0008] In summary, the single-motor power transmission structure proposed in the present invention achieves counter-rotation of the propeller blades mounted on the first and second gears by providing a single motor to drive the first and second gears to rotate in opposite directions. This single motor also reduces flight energy and extends the drone's flight time. Specifically, the single-motor power transmission structure includes a central axis assembly, a power assembly mounted on the central axis assembly, and a gear assembly. The gear assembly includes first and second gears mounted on the central axis assembly, and a third gear mounted on the power assembly. A transmission assembly is provided between the second and third gears, and the second and third gears are meshed. One end of the power assembly meshes with the first gear, driving it to rotate in a first direction. The transmission assembly then drives the third gear to rotate in the first direction. The meshing connection between the second and second gears further causes the second gear to rotate in a second direction, ultimately causing the first and second gears to rotate in opposite directions, and thus the propeller blades mounted on the first and second gears to rotate in opposite directions. By driving the upper and lower propeller blades in counter-rotation with a single motor, energy is conserved and flight time is extended.

[0009] Furthermore, the central axis assembly includes a rotating rod and an axis tube sleeved on the outside of the rotating rod, and the rotating rod and the axis tube are connected by a fixing assembly so that the rotating rod rotates in the axis tube.

[0010] Furthermore, the fixing assembly includes a cup ring mounted on the shaft tube, a chuck mounted on the rotating rod, and at least two clamping members rotatably connected to the chuck, and the chuck abuts against the end face of the cup ring to movably connect the rotating rod to the shaft tube.

[0011] Furthermore, the power assembly includes a mounting bracket fixed on the shaft tube, a power member provided on the mounting bracket, and a power wheel provided at one end of the power member away from the mounting bracket, and the power wheel is meshedly connected to the first gear.

[0012] Furthermore, the transmission assembly includes a first transmission wheel provided between the second gear and the mounting bracket, and a second transmission wheel provided between the third gear and the mounting bracket, and the first transmission wheel and the second gear rotate relative to each other.

[0013] Furthermore, the first transmission wheel and the second transmission wheel are connected by a transmission belt to drive the third gear to rotate.

[0014] Furthermore, the first transmission wheel is arranged on the shaft tube, and the shaft tube is sleeved on the rotating rod, so that the first transmission wheel and the rotating rod can rotate relative to each other.

[0015] Furthermore, a shaft sleeve is provided between the first gear and the mounting bracket for mounting the first gear at a preset height.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description and in part will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0018] Figure 1 This is a schematic diagram of a single-motor power transmission structure in one embodiment of the present invention;

[0019] Figure 2 This is an assembly diagram of the power component, gear component and transmission component.

[0020] Component symbol description in the attached figure:

[0021] Middle shaft assembly 100, rotating rod 110, shaft tube 120, power assembly 200, mounting bracket 210, power member 220, power wheel 230, gear assembly 300, first gear 310, second gear 320, third gear 330, shaft sleeve 340, fixing assembly 400, cup ring 410, chuck 420, clamping member 430, transmission assembly 500, first transmission wheel 510, second transmission wheel 520, transmission belt 530. DETAILED DESCRIPTION

[0022] To make the objectives, features, and advantages of the present invention more readily apparent, the following detailed description of specific embodiments of the present invention is provided in conjunction with the accompanying drawings. The accompanying drawings illustrate several embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the present invention.

[0023] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may also be an element centered thereon. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may also be an element centered thereon. The terms "vertical", "horizontal", "left", "right", "up", "down" and similar expressions used herein are for illustrative purposes only and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0024] In this utility model, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," "fixed," and the like should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. A person of ordinary skill in the art will be able to understand the specific meanings of the above terms in this utility model based on the specific circumstances. The term "and / or" as used herein includes any and all combinations of one or more of the relevant listed items.

[0025] See also Figure 1-Figure 2 , which is a schematic diagram of a single-motor power transmission structure provided in one embodiment of the present invention, includes a central shaft assembly 100, a power assembly 200 provided on the central shaft assembly 100, and a gear assembly 300, wherein:

[0026] In order to support the power assembly 200 and the gear assembly 300, and to realize the counter-rotation function, the central shaft assembly 100 includes a rotating rod 110 and a shaft tube 120 sleeved on the outside of the rotating rod 110, and both ends of the rotating rod 110 are exposed to the outside of the shaft tube 120, and the rotating rod 110 and the shaft tube 120 are connected by a fixing assembly 400, so that the rotating rod 110 can rotate freely in the shaft tube 120 without being constrained by the shaft tube 120.

[0027] To ensure that the rotating rod 110 rotates within the shaft tube 120, the fixing assembly 400 includes a cup ring 410 mounted on the shaft tube 120, a chuck 420 mounted on the rotating rod 110, and at least two clamping members 430 rotatably connected to the chuck 420. The cup ring 410 is mounted on the end of the shaft tube 120 and has a bearing disposed therein. The rotating rod 110 passes through the bearing and is mounted on the chuck 420, thereby relying on the bearing to enable the rotating rod 110 to rotate within the shaft tube 120. Since one end of the rotating rod 110 is mounted within the chuck 420, at least two clamping members 430 extend horizontally into the chuck 420 and are threadedly engaged with the interior of the chuck 420. The clamping members 430 rotate so that their tops abut against the rotating rod 110, thereby securing the rotating rod 110 within the chuck 420. To prevent the rotating rod 110 from falling, one end of the chuck 420 abuts against the end of the cup ring 410. In this embodiment, the shaft tube 120 is a metal tube made of aluminum alloy, the rotating rod 110 is a carbon rod, and the number of clamping members 430 is two, but the number is not limited to the number described in this embodiment and is sufficient to achieve a fixing effect.

[0028] To achieve counter-rotation, the gear assembly 300 includes a first gear 310 and a second gear 320 mounted on the shaft tube 120, as well as a third gear 330 mounted on the power assembly 200. The first gear 310 is mounted via a sleeve 340, aligning it with the power assembly 200 at the same height, allowing the power assembly 200 to drive the first gear 310 in rotation. The first gear 310 is sleeved around the circumferential surface of the shaft tube 120, while the second gear 320 is mounted on the rotating rod 110, located on the side of the power assembly 200 away from the first gear 310. This separates the first gear 310 from the second gear 320. It should be noted that the third gear 330 is mounted on the power assembly 200. Since the power assembly 200 is fixed to the shaft tube 120, it does not rotate with the power assembly 200 around the shaft tube 120, but only rotates with the power assembly 200.

[0029] To provide power to the gear assembly 300, the power assembly 200 includes a mounting bracket 210 mounted on the shaft tube 120, a power member 220 mounted on the mounting bracket 210, and a power wheel 230 mounted on the power member 220 at an end away from the mounting bracket 210. The power wheel 230 is connected to a transmission shaft externally mounted on the power member 220, so that the power member 220 drives the power wheel 230 to rotate via the transmission shaft. Furthermore, because the power wheel 230 is meshed with the first gear 310, when the power member 220 drives the power wheel 230 to rotate, it also drives the first gear 310 to rotate along the first direction on the shaft tube 120.

[0030] Furthermore, to enable the first gear 310 and the second gear 320 to rotate in opposite directions, a transmission assembly 500 is provided at the bottom of the shaft tube 120. The transmission assembly 500 includes a first transmission wheel 510 located at the rear of the shaft tube 120 and a second transmission wheel 520 located on the mounting bracket 210. The first and second transmission wheels 510, 520 are connected externally by a transmission belt 530. The first transmission wheel 510 is located between the second gear 320 and the shaft tube 120, while the second transmission wheel 520 is located between the third gear 330 and the mounting bracket 210. It is worth noting that the first transmission wheel 510 and the second gear 320 can rotate relative to each other, and the second transmission wheel 520 can drive the third gear 330 to rotate in the same direction. When the power wheel 230 drives the first gear 310 to rotate in the first direction, the first gear 310 drives the shaft tube 120 to rotate in the first direction, which in turn causes the shaft tube 120 to drive the first transmission wheel 510 located at its bottom to rotate in the first direction. Driven by the transmission belt 530, the first transmission wheel 510 also drives the second transmission wheel 520 to rotate in the first direction. Similarly, the second transmission wheel 520 rotates coaxially with the third gear 330, thereby causing the third gear 330 to rotate in the first direction. Because the second gear 320 is meshed with the third gear 330, when the third gear 330 rotates in the first direction, the second gear 320 rotates in the second direction, thereby causing the first gear 310 and the second gear 320 to rotate in the first and second directions, respectively, ultimately achieving counter-rotation between the first gear 310 and the second gear 320.

[0031] In summary, the single-motor power transmission structure proposed in the present invention achieves counter-rotation of the propeller blades mounted on the first and second gears by providing a single motor to drive the first and second gears to rotate in opposite directions. This single motor also reduces flight energy and extends the drone's flight time. Specifically, the single-motor power transmission structure includes a central axis assembly, a power assembly mounted on the central axis assembly, and a gear assembly. The gear assembly includes first and second gears mounted on the central axis assembly, and a third gear mounted on the power assembly. A transmission assembly is provided between the second and third gears, and the second and third gears are meshed. One end of the power assembly meshes with the first gear, driving it to rotate in a first direction. The transmission assembly then drives the third gear to rotate in the first direction. The meshing connection between the second and second gears further causes the second gear to rotate in a second direction, ultimately causing the first and second gears to rotate in opposite directions, and thus the propeller blades mounted on the first and second gears to rotate in opposite directions. By driving the upper and lower propeller blades in counter-rotation with a single motor, energy is conserved and flight time is extended.

[0032] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0033] The above-described embodiments merely represent several implementation methods of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A single motor power transmission structure, characterized in that: It includes a central shaft assembly, a power assembly and a gear assembly arranged on the central shaft assembly; The gear assembly includes a first gear and a second gear arranged on the central shaft assembly, and a third gear arranged on the power assembly. The second gear and the third gear are provided with a transmission assembly. The second gear and the third gear are meshed and connected. One end of the power assembly is meshed and connected with the first gear. The power assembly drives the first gear to rotate in a first direction, and at the same time drives the third gear to rotate in the first direction through the transmission assembly, thereby driving the second gear to rotate in the second direction.

2. The single-motor power transmission structure according to claim 1, characterized in that: The central axis assembly comprises a rotating rod and an axle tube sleeved outside the rotating rod. The rotating rod and the axle tube are connected via a fixing assembly so that the rotating rod can rotate inside the axle tube.

3. The single-motor power transmission structure according to claim 2, characterized in that: The fixing assembly includes a cup ring sleeved on the shaft tube, a chuck sleeved on the rotating rod, and at least two clamping members rotatably connected to the chuck, and the chuck abuts against the end surface of the cup ring to movably connect the rotating rod to the shaft tube.

4. The single-motor power transmission structure according to claim 1, characterized in that: The power assembly includes a mounting bracket fixed on the shaft tube, a power member arranged on the mounting bracket, and a power wheel arranged at one end of the power member away from the mounting bracket, and the power wheel is meshedly connected with the first gear.

5. The single-motor power transmission structure according to claim 1, characterized in that: The transmission assembly includes a first transmission wheel arranged between the second gear and the mounting bracket, and a second transmission wheel arranged between the third gear and the mounting bracket, and the first transmission wheel and the second gear rotate relatively.

6. The single-motor power transmission structure according to claim 5, characterized in that: The first transmission wheel and the second transmission wheel are connected via a transmission belt to drive the third gear to rotate.

7. The single-motor power transmission structure according to claim 6, characterized in that: The first transmission wheel is arranged on the shaft tube, and the shaft tube is sleeved on the rotating rod, so that the first transmission wheel and the rotating rod can rotate relatively.

8. The single-motor power transmission structure according to claim 1, characterized in that: A shaft sleeve for mounting the first gear at a preset height is provided between the first gear and the mounting bracket.

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