A motor damping connection device for a drone and the drone

Abstract

The present invention relates to the field of unmanned aerial vehicles, and particularly to a motor vibration damping connection device for an unmanned aerial vehicle and an unmanned aerial vehicle having the motor vibration damping connection device. Among them, the motor vibration damping connection device includes a fixed arm, a base, a support and dampers; both ends of the fixed arm are respectively used for connecting with the unmanned aerial vehicle body and the base; the support is arranged inside or outside the fixed arm; a plurality of dampers are dispersedly connected between the periphery of the support and the periphery of the base. In the present invention, the motor can be fixed by the support arranged in suspension, and the damping is realized by the dampers arranged between the support and the base, so as to avoid directly conducting the vibration of the motor to the unmanned aerial vehicle body, thereby reducing the influence of the motor vibration on other devices of the unmanned aerial vehicle. At the same time, the structure of the entire motor vibration damping connection device is very compact and small, thereby reducing the overall volume of the unmanned aerial vehicle and being beneficial to improving the aerodynamic performance of the unmanned aerial vehicle.

Description

Technical Field

[0001] The present invention relates to the field of unmanned aerial vehicles, and particularly to a motor vibration damping connection device for an unmanned aerial vehicle and an unmanned aerial vehicle having the motor vibration damping connection device. Background Art

[0002] At present, unmanned aerial vehicles have been widely used in many fields such as geographical terrain mapping, exploration, power line inspection, tactical reconnaissance, target positioning, target damage assessment, electronic countermeasure, communication relay, etc. Electric unmanned aerial vehicles have a simple structure and are easy to manufacture, the motors are light in weight, and the power systems are easy to standardize. Therefore, the whole machine is relatively easy to control, has a low flight noise, and the motors are widely used in small and medium-sized unmanned aerial vehicles.

[0003] At present, most of the motors of unmanned aerial vehicles are directly fixed to the motor fixing arm. The motors will generate high-frequency vibrations during operation, and the vibrations are transmitted to the airframe through the motor fixing arm, which has a great impact on the service life of the electronic devices in the airframe and the quality of the load data. In severe cases, the flight performance and safety of the unmanned aerial vehicle are greatly reduced. Summary of the Invention

[0004] In view of this, the present invention provides a motor vibration damping connection device for an unmanned aerial vehicle and an unmanned aerial vehicle having the motor vibration damping connection device, aiming to reduce the influence of motor vibrations on other devices of the unmanned aerial vehicle.

[0005] To solve the above technical problems, the technical solutions adopted by the present invention are as follows:

[0006] A motor vibration damping connection device for an unmanned aerial vehicle is used to realize the connection between the motor and the airframe of the unmanned aerial vehicle. The motor vibration damping connection device includes a fixing arm, a base, a support and dampers; one end of the fixing arm is used to be connected to the airframe of the unmanned aerial vehicle, and the other end is connected to the base; a through hole for the motor to pass through is opened on the base; the support is arranged inside the fixing arm; a plurality of the dampers are dispersedly connected between the periphery of the support and the periphery of the base; the motor is installed on the support.

[0007] In some embodiments, the plurality of dampers are divided into multiple groups, and each group includes at least one damper; the multiple groups of dampers are evenly and dispersedly connected between the periphery of the support and the periphery of the base.

[0008] In some embodiments, two of the dampers are divided into a group, and the dampers in each group are symmetrical to each other.

[0009] In some embodiments, the center line of the damper is arranged at a non-zero degree angle with respect to the center connection line between the support and the base.

[0010] In some embodiments, an adjustment mechanism for adjusting the position of the motor is provided on the through hole of the base.

[0011] In some embodiments, the adjustment mechanism is a plurality of ball bearings; the base has mounting positions for the ball bearings.

[0012] In some embodiments, the adjustment mechanism is an elastic ring; the base has a mounting position for the elastic ring.

[0013] An unmanned aerial vehicle, the unmanned aerial vehicle includes an unmanned aerial vehicle body and a power system; the power system includes a motor, a propeller, and a motor shock absorption connection device; the propeller is mounted on the rotating shaft of the motor; the motor is connected to the unmanned aerial vehicle body through the motor shock absorption connection device.

[0014] In some embodiments, the power system further includes an electronic speed controller; the electronic speed controller is disposed in the fixed arm and is electrically connected to the motor.

[0015] In some embodiments, the power system is disposed at least at one of the front part, the tail part, the middle part, or the wing of the unmanned aerial vehicle body, and at least one power system is provided at each location.

[0016] In summary, compared with the prior art, the present invention has the following advantages and beneficial effects: The motor is fixed by a support that is located in the fixed arm and is suspended, and damping is achieved by a damper provided between the support and the base, thereby avoiding directly transmitting the vibration of the motor to the unmanned aerial vehicle body, and further reducing the impact of the motor vibration on other devices of the unmanned aerial vehicle. At the same time, since most of the motor is built into the fixed arm, the structure of the entire power system is also very compact and small, thereby reducing the overall volume of the unmanned aerial vehicle and being beneficial to improving the aerodynamic performance of the unmanned aerial vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of the unmanned aerial vehicle of the present invention.

[0018] Figure 2 It is a schematic structural diagram of the power system of the present invention.

[0019] Figure 3 It is a schematic structural diagram of the motor shock absorption connection device of the present invention after omitting the fixed arm.

[0020] Figure 4 It is another schematic structural diagram of the motor shock absorption connection device of the present invention after omitting the fixed arm.

[0021] The definitions of the reference numerals in the figure are as follows: the UAV body 1, the power system 2, the fixed arm 21, the electronic speed controller 22, the damping shock absorber 23, the motor 24, the propeller 25, the fixing screw 26, the fixing nut 27, the support 231, the damper 232, the base 233, the motor mounting screw 234, the ball 235, the embedded nut 236, and the elastic ring 237. Detailed implementation manners

[0022] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the specific implementation manners.

[0023] In the description of the present invention, it should be understood that for the orientation description, such as the orientation or positional relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 construed as a limitation to the present invention.

[0024] In the description of the present invention, the meaning of several is one or more, the meaning of multiple is two or more, greater than, less than, exceeding, etc. are understood as not including the present number, and above, below, within, etc. are understood as including the present number. If there are descriptions of similar terms such as first and second, they are only used to distinguish technical features and should not be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0025] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific content of the technical solution.

[0026] One aspect of the embodiments of the present application introduces a UAV, as Figure 1 shown. The UAV includes a UAV body 1 and a power system 2. It should be noted that although the power system 2 is located at the front of the UAV body 1 and only one is provided in Figure 1 to enable the UAV body 1 to obtain forward, turning or balancing power, in other embodiments, the power system 2 can also be arranged at least at one of the tail, middle or wing of the UAV body 1 to enable the UAV body 1 to obtain forward, backward, turning or balancing power, and at least one such power system 2 can be arranged at each location.

[0027] As Figure 2As shown in the figure, the power system 2 described in the embodiment of the present application includes a motor vibration damping connection device, a motor 24, and a propeller 25. The propeller 25 is connected to a preset thread on the rotating shaft of the motor 24 through a fixing nut 27, and the motor 24 is connected to the drone body 1 through the motor vibration damping connection device.

[0028] On the other hand, the embodiment of the present application introduces a motor vibration damping connection device for a drone, as Figure 2 shown. The motor vibration damping connection device includes a fixing arm 21 and a damping device 23. Among them, as Figure 3 shown, the damping device 23 includes a base 233, a support 231, and a damper 232.

[0029] One end of the fixing arm 21 is used to connect to the drone body 1, and the other end is connected to the base 233. The end of the fixing arm 21 connected to the base 233 has a cavity, so that the support 231 can be suspended inside the fixing arm 21.

[0030] At the same time, the electronic speed controller 22 for adjusting the speed of the motor 24 can also be arranged in the cavity of the fixing arm 21. The electronic speed controller 22 can be electrically connected to the control system in the drone body 1 along a wire channel preset in the fixing arm 21. The electronic speed controller, full name Electronic Speed Control (abbreviated as ESC), can be divided into brushed electronic speed controllers and brushless electronic speed controllers for different motors. After being electrically connected to the motor, it can adjust the speed of the motor according to the control signal.

[0031] The base 233 is provided with an embedded nut 236. By opening a through hole at the end of the fixing arm 21 connected to the base 233 and passing through a fixing screw 26 to form a screw connection with the embedded nut 236, the base 233 is firmly fixed at the end of the fixing arm 21.

[0032] A plurality of dampers 232 are dispersedly connected between the periphery of the support 231 and the periphery of the base 233, which enables the plurality of dampers 232 to enclose a space to accommodate the motor 24. Moreover, a through hole for the motor 24 to pass through is provided on the base 233, so that the motor 24 can extend out to install the propeller 25. On one side of the support 231 close to the base 233, an installation base for installing the motor 24 is provided. For example, a motor mounting seat is provided on this side of the base 233, and the motor 24 is firmly connected to the base 233 through the motor mounting screws 234 preset on the motor mounting seat. In this way, the motor 24 is fixed by the support 231 located inside the fixed arm 21 and suspended, and the damper 232 provided between the support 231 and the base 233 is used for shock absorption, so as to prevent the vibration of the motor 24 from being directly transmitted to the UAV body 1, and further reduce the influence of the vibration of the motor 24 on other devices of the UAV. At the same time, since most of the motor 24 is built into the fixed arm 21 and located between the plurality of dampers (232), the structure of the entire power system 2 is also very compact and small, thereby reducing the overall volume of the UAV and being beneficial to improving the aerodynamic performance of the UAV.

[0033] In order to enable the plurality of dampers 232 to better absorb the vibration of the motor 24, in the embodiments of the present application, the plurality of dampers 232 can also be divided into multiple groups, and each group includes at least one damper 232. Then, the multiple groups of dampers 232 are evenly and dispersedly connected between the periphery of the support 231 and the periphery of the base 233 to ensure that each group of dampers 232 can absorb the vibration of the motor 24, avoid excessive force concentration on one or several groups, and also ensure that the attitude of the motor 24 will not be excessively deflected due to vibration, thereby affecting the power supply quality of the power system 2.

[0034] The damper 232 is a device that can provide motion resistance and dissipate motion energy. In the embodiments of the present application, the damper 232 can adopt common types of dampers such as hydraulic dampers, wind dampers or spring dampers.

[0035] In some embodiments, two dampers 232 can be divided into a group, and then the two dampers 232 in each group are symmetrically arranged with each other. For example, like Figure 3 as shown in the figure, two adjacent dampers 232 are in a group, and then the two adjacent dampers 232 are line-symmetric about the center line of the two; or, two dampers 232 that are relatively arranged with respect to the central connection line of the support 231 and the base 233 are in a group, and then the two dampers 232 are centrosymmetric about the central connection line of the support 231 and the base 233. The two dampers 232 in each group are symmetrically arranged with each other, which can make the force on the two dampers 232 in each group more uniform, and even in some cases, the forces of the two can cancel each other out, so as to better absorb the vibration of the motor 24.

[0036] The central axis of the damper 232 can be arranged parallel to the central connection line of the support 231 and the base 233, so that the damper 232 can absorb the axial vibration generated by the motor 24 as much as possible. In order to absorb the axial vibration and radial vibration generated by the motor 24 at the same time, the central axis of the damper 232 can be arranged at a non-zero angle with respect to the central connection line of the support 231 and the base 233, that is, there is a non-zero angle between the central axis of the damper 232 and the central axis of the motor 24, so that the damper 232 is in an inclined state to be able to absorb the vibration in all directions. Preferably, the range of this angle is greater than 0° and less than 90°.

[0037] Since the vibration of the motor 24 is not only axial but also radial, and the radial vibration of the motor 24 will cause the motor 24 to swing. To reduce the influence of the swing of the motor 24 on the power system 2, in the embodiment of the present application, an adjustment mechanism for adjusting the position of the motor 24 can also be provided on the through hole of the base 233.

[0038] For example, the adjustment mechanism can be Figure 3 the multiple balls 235 shown in. The multiple balls 235 are evenly and dispersedly arranged on the inner ring of the base 233, and there are mounting positions for the balls 235 on the inner ring of the base 233, such as holes. Through the balls 235, the motor 24 that swings to be skewed can be adjusted to a state as parallel as possible to the central axis of the fixed arm 21, so as to reduce the collision of the motor 24 against the fixed arm 21 after swinging. That is, the multiple balls 235 enable the motor 24 to have an adaptive adjustment function and can also absorb part of the vibration of the motor 24.

[0039] The adjustment mechanism can also be Figure 4 the elastic ring 237 shown in. The elastic ring 237 can be made into a ring shape with an elastic material such as rubber, and there is a mounting position for the elastic ring 237 on the base 233, such as a groove. The elastic ring 237 also enables the motor 24 to have an adaptive adjustment function and can also absorb part of the vibration of the motor 24.

[0040] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0041] The above preferred embodiments should not be regarded as limiting the present invention. The protection scope of the present invention should be subject to the scope defined by the claims. For those of ordinary skill in the art of this technology, without departing from the spirit and scope of the present invention, several improvements and refinements can also be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A motor damping connection device for a drone, which is used to connect a motor (24) and a drone body (1), and is characterized in that: The motor vibration damping connection device includes a fixed arm (21), a base (233), a support (231), and a damper (232). One end of the fixed arm (21) is used to connect to the drone body (1), and the other end is connected to the base (233). A through hole for the motor (24) to pass through is provided on the base (233); an adjustment mechanism for adjusting the position of the motor (24) is provided on the through hole of the base (233), and the adjustment mechanism is used to reduce the swing of the motor (24). The support (231) is suspended inside the fixed arm (21). A plurality of the dampers (232) are dispersedly connected between the periphery of the support (231) and the periphery of the base (233). The motor (24) is installed on the support (231) and is located within the space enclosed by the plurality of dampers (232).

2. The motor vibration damping connection device of an unmanned aerial vehicle according to claim 1, characterized in that: The plurality of dampers (232) are divided into multiple groups, and each group includes at least one damper (232); the multiple groups of dampers (232) are evenly and dispersedly connected between the periphery of the support (231) and the periphery of the base (233).

3. The motor damping connection device of a drone according to claim 2, wherein: Two of the dampers (232) are divided into a group, and the dampers (232) in each group are symmetrical to each other.

4. A motor damping connection device for a drone according to any one of claims 1-3, characterized in that: The central line of the damper (232) is set at a non-zero angle with respect to the central connection line between the support (231) and the base (233).

5. The motor damping connection device of a drone according to claim 1, characterized in that: The adjustment mechanism is a plurality of balls (235); the base (233) has an installation position for the balls (235).

6. The motor damping connection device of a drone according to claim 1, wherein: The adjustment mechanism is an elastic ring (237); the base (233) has an installation position for the elastic ring (237).

7. A drone, characterized in that: The drone includes a drone body (1) and a power system (2); the power system (2) includes a motor (24), a propeller (25), and the motor vibration damping connection device according to any one of claims 1-6; the propeller (25) is installed on the rotating shaft of the motor (24); the motor (24) is connected to the drone body (1) through the motor vibration damping connection device.

8. A drone according to claim 7, characterized in that: The power system (2) further includes an electronic speed controller (22); the electronic speed controller (22) is arranged inside the fixed arm (21) and is electrically connected to the motor (24).

9. A drone according to claim 7, characterized in that: The power system (2) is arranged at least at one of the front part, the tail part, the middle part, or the wing of the drone body (1), and at least one power system (2) is provided at each location.

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