Power generation device for drones

Abstract

The present invention relates to the field of power generation technology, and provides a drone and a power generation device thereof. Through the power generation device of the present invention, when the gear set is screwed to abut against and limit the first limit position through cooperation with the thread, the electric start generator is in the electric start mode, and the electric start active gear is meshed with the electric start passive gear with a larger force arm, and the driving resistance is small, so it is easier to be started by the small-power electric start generator; after the engine is started, the speed gradually increases, and the driving relationship is changed from the electric start generator driving the engine to rotate to the engine driving the electric start generator to rotate, at this time, the electric start passive gear drives the electric start active gear to be screwed in the direction of the second limit position, until the power generation passive gear is meshed with the power generation active gear and is limited by the second limit position, the power generation passive gear is driven to rotate by the smaller diameter power generation active gear, and the driving resistance is small, and the electric start generator is switched to the power generation mode for power generation.

Description

Technical Field

[0001] The present invention relates to the technical field of power generation, and in particular to a power generation device for an unmanned aerial vehicle. Background Art

[0002] With the rapid development of science and technology, engines are used in various industrial sites. When a conventional engine is started, the engine is driven by the starter motor. When the engine is running normally, the starter motor stops working. At this time, the engine drives another power generation device to power batteries and other equipment.

[0003] With the development of lightweight and integrated equipment, the requirements on the size and weight of the engine are becoming more and more stringent. There is an urgent need for an engine with higher integration, lighter weight and smaller size to meet industrial needs. Summary of the invention

[0004] The purpose of the present invention is to provide a power generation device with higher integration, lighter weight and smaller volume.

[0005] To achieve the above-mentioned purpose, the present invention provides a power generation device including an engine and an electric starter generator, wherein an electric starter passive gear and a power generation driving gear are arranged at intervals on the engine shaft of the engine, and the diameter of the electric starter passive gear is larger than the diameter of the power generation driving gear; a thread and a gear set matching the thread are arranged on the motor shaft of the starter generator, and the gear set includes an electric starter driving gear and a power generation passive gear connected to each other; a first limit and a second limit are respectively arranged at both ends of the motor shaft, and when the gear set abuts against the first limit, the electric starter driving gear is meshed with the electric starter passive gear, and when the gear set abuts against the second limit, the power generation passive gear is meshed with the power generation driving gear.

[0006] Optionally, the thread includes an electric starting thread arranged close to the first limit and a power generating thread arranged close to the second limit, and the portion of the motor shaft between the electric starting thread and the power generating thread is a light axis.

[0007] Optionally, the length of the optical axis is smaller than the length of the gear set.

[0008] Optionally, the diameter of the power generation driving gear is greater than the diameter of the power generation passive gear.

[0009] Optionally, a battery is also included, which is electrically connected to the starter generator and is used to provide starting power for the starter generator and store the power generated by the starter generator.

[0010] A drone comprises the power generation device as described above.

[0011] Through the power generation device of the present invention, when the gear set is screwed to abut against and limit the first limit through cooperation with the thread, the starting generator is in the electric starting mode, and the electric starting main gear is meshed with the electric starting passive gear with a larger force arm, and the driving resistance is small, so it is easier to be started by the small-power electric starting generator; after the engine is started, the speed gradually increases, and the driving relationship is changed from the electric starting generator driving the engine to rotate to the engine driving the electric starting generator to rotate. At this time, the electric starting passive gear drives the electric starting active gear to be screwed in the direction of the second limit until the power generation passive gear is meshed with the power generation active gear and is limited by the second limit, and the power generation passive gear is driven to rotate by the smaller diameter power generation active gear, and the driving resistance is small, and the electric starting generator switches to the power generation mode to generate electricity. The drone using this power generation device can achieve lightweight and miniaturization of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a schematic diagram of an electric starting state of a power generation device according to an embodiment of the present invention;

[0013] Figure 2 It is a schematic diagram of the power generation state of the power generation device according to an embodiment of the present invention.

[0014] Reference numerals:

[0015] 1. Engine; 2. Generator driving gear; 3. Electric starter passive gear; 4. Electric starter thread; 5. Electric starter driving gear; 6. Generator passive gear; 7. Optical shaft; 8. Generator thread; 9. Electric starter generator. DETAILED DESCRIPTION

[0016] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. The specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. Based on the described embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present invention.

[0017] Combination Figure 1 and Figure 2As shown, an embodiment of the present invention provides a power generation device, including an engine 1 and an electric starter generator 9, an electric starter passive gear 3 and a power generation driving gear 2 are arranged on the engine shaft of the engine 1 at intervals, and the diameter of the electric starter passive gear 3 is larger than the diameter of the power generation driving gear 2; a thread and a gear set matched with the thread are provided on the motor shaft of the starter generator, and the gear set includes an electric starter driving gear 5 and a power generation passive gear 6 connected to each other; a first limit and a second limit are respectively provided at both ends of the motor shaft, when the gear set abuts against the first limit, the electric starter driving gear 5 is meshed with the electric starter passive gear 3, and the power generation passive gear 6 is disengaged from the power generation driving gear 2, and when the gear set abuts against the second limit, the power generation passive gear 6 is meshed with the power generation driving gear 2, and the electric starter driving gear 5 is disengaged from the electric starter passive gear 3.

[0018] By means of the power generation device of the present invention, Figure 1 As shown, the electric starter generator 9 is in the electric start mode, the electric starter active gear 5 drives the electric starter passive gear 3 to rotate, and the electric starter active gear 5 is screwed in the direction of the first limit position due to resistance until it abuts against the first limit position; since the force arm of the electric starter active gear 5 is small and the force arm of the electric starter passive gear 3 is large, the driving resistance for the electric starter generator 9 is small, so it is easier to start the engine 1.

[0019] like Figure 2 As shown, after the engine 1 is started, the speed gradually increases, and the driving relationship is changed from the electric starter generator 9 driving the engine 1 to rotate to the engine 1 driving the electric starter generator 9 to rotate. At this time, the electric starter passive gear 3 drives the electric starter driving gear 5 to rotate in the direction of the second limit; wherein, since the transmission ratios of the gear set and the power generation driving gear 2 and the electric starter passive gear 3 are different, the gear set cannot be meshed with the power generation driving gear 2 and the electric starter passive gear 3 at the same time. Therefore, the axial length of the gear set should be slightly smaller than the spacing between the power generation driving gear 2 and the electric starter passive gear 3, so that after the gear set is disengaged from the meshing with the electric starter passive gear 3, it can continue to be screwed in the direction of the second limit under the action of inertia until the power generation passive gear 6 begins to mesh with the power generation driving gear 2, and continues to be screwed in the second limit during the rotation until it is limited by the second limit. At this time, the power generation passive gear 6 is driven to rotate by the smaller diameter power generation driving gear 2, and the driving resistance is small. The electric starter generator 9 switches to the power generation mode to generate electricity, forming a stable and stable power generation mode.

[0020] In some embodiments, the thread includes an electric start thread 4 disposed near the first limit and a power generation thread 8 disposed near the second limit, and a portion of the motor shaft between the electric start thread 4 and the power generation thread 8 is an optical axis 7. The presence of the optical axis 7 can reduce the resistance of the gear set to be screwed along the motor shaft, so that the gear set contacts with relatively fewer screw teeth during the screwing process from being engaged with the electric start passive gear 3 to being engaged with the power generation passive gear 6, and the screwing resistance is small, which can prevent the gear set from being unable to automatically mesh with the power generation active gear 2 due to the resistance offsetting too much inertia.

[0021] In some embodiments, the length of the optical axis 7 is smaller than the length of the gear set, so that the gear set can be threadedly engaged with the power generation thread 8 before being unscrewed from the electric starting thread 4, thereby preventing the gear set from freely falling on the optical axis and damaging the power generation thread 8.

[0022] In some embodiments, the diameter of the power generation driving gear 2 is greater than the diameter of the power generation passive gear 6, that is, the transmission ratio is a positive value, thereby ensuring the power generation efficiency.

[0023] In some embodiments, a battery is also included, which is electrically connected to the starter generator and is used to provide starting power for the starter generator and store the power generated by the starter generator.

[0024] The present invention also provides an unmanned aerial vehicle, comprising the power generation device as described above. The unmanned aerial vehicle using the power generation device can achieve lightweight and miniaturization of the equipment.

[0025] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A power generation device for an unmanned aerial vehicle, characterized in that: It comprises an engine and an electric starter generator, wherein an electric starter passive gear and a power generation driving gear are arranged at intervals on the engine shaft of the engine, and the diameter of the electric starter passive gear is larger than the diameter of the power generation driving gear; a thread and a gear set matched with the thread are arranged on the motor shaft of the starter generator, and the gear set comprises an electric starter driving gear and a power generation passive gear connected to each other; a first limit and a second limit are respectively arranged at both ends of the motor shaft, and when the gear set abuts against the first limit, the electric starter driving gear meshes with the electric starter passive gear, and when the gear set abuts against the second limit, the power generation passive gear meshes with the power generation driving gear; The thread includes an electric starting thread arranged close to the first limit and a power generation thread arranged close to the second limit, and the portion of the motor shaft between the electric starting thread and the power generation thread is a light axis.

2. The power generation device for a drone according to claim 1, characterized in that: The length of the optical axis is smaller than the length of the gear set.

3. The power generation device for a drone according to claim 1, characterized in that: The diameter of the power generation driving gear is greater than the diameter of the power generation passive gear.

4. The power generation device for a drone according to any one of claims 1 to 3, characterized in that: It also includes a battery, which is electrically connected to the starter generator and is used to provide starting power for the starter generator and store the power generated by the starter generator.

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