Unmanned aerial vehicle propeller with noise reduction function

Abstract

The utility model discloses an unmanned aerial vehicle propeller with a noise reduction function, and belongs to the field of unmanned aerial vehicle propellers, the unmanned aerial vehicle propeller comprises a motor shell and propeller blades, a motor body is arranged in the motor shell, the outer wall of a motor shaft of the motor body is sleeved with a bearing sleeve, and the outer end of the bearing sleeve is fixedly connected with a connector; a mounting plate is fixedly connected to the upper end of a motor shaft of the motor body, propeller blades are fixedly connected between the mounting plate and the connector, a notch is formed in the bearing sleeve, a vibration isolation pad is sleeved with the notch, an arc-shaped opening is formed in the vibration isolation pad, and a sound absorption plate is fixedly connected to the inner wall of the motor shell. Through mutual cooperation of the vibration isolation plate, the mounting ring, the spring, the damping pin and the sound absorption plate structure, the problems of vibration and noise generated when the motor body works can be effectively reduced, so that vibration propagation is reduced, noise generated when a propeller works is reduced, and practicability is achieved.

Description

TECHNICAL FIELD

[0001] The application relates to the field of unmanned aerial vehicle propellers, in particular to an unmanned aerial vehicle propeller with a noise reduction function. BACKGROUND

[0002] The propeller is an important component on an airplane, and the propeller can be used to control the functions of the airplane, such as ascending, descending and turning, and is widely applied. Due to the noise of the unmanned aerial vehicle propeller, mainly the airflow friction sound and vortex sound generated when the propeller rotates, currently, the structure of the propeller is mainly improved to reduce the noise. By optimizing the blade shape, material, number of blades, angle of attack, edge design and the like of the propeller, the function of reducing the noise of the unmanned aerial vehicle propeller can be realized.

[0003] However, the noise reduction range is limited by only improving the blade shape. The driving motor of the propeller will generate vibration when working, and then the vibration is transmitted to the propeller through the motor shaft, which affects the noise reduction effect of the propeller when working. Based on this, the application provides an unmanned aerial vehicle propeller with a noise reduction function for improvement. SUMMARY

[0004] The purpose of the application is to reduce the influence on the propeller by reducing the vibration of the propeller driving motor, so as to further reduce the noise problem of the propeller when working.

[0005] To achieve the above purpose, the technical scheme adopted by the application is as follows: a motor shell and a propeller blade are arranged, a motor body is arranged in the motor shell, a bearing sleeve is sleeved on the outer wall of the motor shaft of the motor body, a connector is fixedly connected to the outer end of the bearing sleeve, an installation plate is fixedly connected to the upper end of the motor shaft of the motor body, the propeller blade is fixedly connected between the installation plate and the connector, a notch is formed in the bearing sleeve, a vibration isolation pad is sleeved in the notch, an arc-shaped opening is formed in the vibration isolation pad, a sound absorption plate is fixedly connected to the inner wall of the motor shell, a vibration isolation plate is fixedly connected to the side wall of the motor body, an installation ring is fixedly connected to the upper and lower outer walls of the motor body, and a spring and a damping pin are fixedly connected between the installation ring and the inner wall of the sound absorption plate.

[0006] As a preferred, the propeller blade is provided with two, and the two propeller blades are fixedly connected to the upper end surface of the connector on both sides.

[0007] As a preferred, the vibration isolation pad is filled in the notch, the connector is fixedly sleeved on the outer wall of the bearing sleeve, and the motor shaft of the motor body is fixedly sleeved on the inner wall of the bearing sleeve.

[0008] As a preferred, the number of arc-shaped openings is multiple, and the multiple arc-shaped openings are uniformly distributed on the vibration isolation pad.

[0009] As a preferred, the spring is sleeved on the outer end of the damping pin, and the number of the spring and the damping pin is provided with multiple, and the multiple springs and damping pins are uniformly distributed.

[0010] As a preferred, the damping pin comprises a sleeve and a push rod sleeved in the sleeve, a piston is slidably connected in the sleeve, one end of the push rod is fixedly connected to the piston, and the other end of the push rod is fixedly connected to the inner wall of the sound absorption plate.

[0011] Compared with the prior art, the application has the beneficial effects that:

[0012] (1) By setting the vibration isolation plate, the mounting ring, the spring, the damping pin and the sound absorption plate structure cooperate with each other, the vibration generated on the side of the motor body is isolated by the vibration isolation plate, and the vibration generated on the upper and lower surfaces of the motor body is buffered by the spring cooperating with the damping pin, which can effectively reduce the vibration and noise generated by the motor body during operation, thereby reducing the vibration propagation and cooperating with the sound absorption plate to reduce the noise during the operation of the propeller;

[0013] (2) By setting the bearing sleeve and opening a circular slot structure on the bearing sleeve, the bearing sleeve is divided into an inner sleeve and an outer sleeve, and then a vibration isolation pad is filled between the inner sleeve and the outer sleeve for vibration isolation, which can further reduce the vibration between the motor shaft and the propeller blades, thereby further reducing the noise problem of the propeller blades during operation, and achieving good noise reduction effect. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a main structure diagram of the unmanned aerial vehicle propeller with noise reduction function;

[0015] Figure 2 It is an internal structure diagram of the motor shell of the unmanned aerial vehicle propeller with noise reduction function;

[0016] Figure 3 It is a bearing sleeve structure diagram of the unmanned aerial vehicle propeller with noise reduction function;

[0017] Figure 4 It is an internal structure diagram of the damping pin of the unmanned aerial vehicle propeller with noise reduction function.

[0018] In the figure: 1, motor shell; 2, motor body; 3, vibration isolation plate; 4, mounting ring; 5, spring; 6, damping pin; 601, sleeve; 602, push rod; 603, piston; 7, bearing sleeve; 8, vibration isolation pad; 9, arc-shaped port; 10, connector; 11, mounting plate; 12, propeller blade; 13, slot; 14, sound absorption plate. DETAILED DESCRIPTION

[0019] Hereinafter, the present application will be further described with reference to the specific embodiments, it should be noted that the embodiments described below or the technical features between the embodiments can be combined to form new embodiments without conflict.

[0020] In the description of the present application, it should be noted that for orientation words, such as the terms "center", "transverse", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation and positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and cannot be understood as limiting the specific protection scope of the present application.

[0021] It should be noted that the terms "first", "second" and the like in the specification and claims of the present application are used to distinguish similar objects, and do not necessarily have to describe a specific order or sequence.

[0022] The terms "include" and "have" and any variations thereof in the specification and claims of the present application are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device that includes a series of steps or units does not have to be limited to only those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0023] As shown in Figures 1-4 A drone propeller with noise reduction function, comprising a motor shell 1 and a propeller blade 12, a motor body 2 is arranged in the motor shell 1, a bearing sleeve 7 is sleeved on the outer wall of the motor shaft of the motor body 2, a connector 10 is fixedly connected to the outer end of the bearing sleeve 7, an installation plate 11 is fixedly connected to the upper end of the motor shaft of the motor body 2, the propeller blade 12 is fixedly connected between the installation plate 11 and the connector 10, a notch 13 is formed on the bearing sleeve 7, a vibration isolation pad 8 is sleeved in the notch 13, an arc-shaped opening 9 is formed on the vibration isolation pad 8, a sound-absorbing plate 14 is fixedly connected to the inner wall of the motor shell 1, the noise generated by the motor body 2 is reduced, a vibration isolation plate 3 is fixedly connected to the side wall of the motor body 2, the vibration isolation plate 3 is made of rubber plate, installation rings 4 are fixedly connected to the upper and lower outer walls of the motor body 2, springs 5 and damping pins 6 are respectively fixedly connected between the installation rings 4 and the inner wall of the sound-absorbing plate 14, the springs 5 cooperate with the damping pins 6 to achieve the damping effect of the motor body 2.

[0024] The two propeller blades 12 are fixedly connected to the upper end face of the connector 10, the plurality of arc-shaped openings 9 are evenly distributed on the vibration isolation pad 8, the arc-shaped opening 9 can optimize the air flow, further improve the damping performance of the mounting ring 4, the spring 5 is movably sleeved on the outer end of the damping pin 6, and the number of the spring 5 and the damping pin 6 is multiple, and the plurality of spring 5 and damping pin 6 are evenly distributed.

[0025] The vibration isolation pad 8 is filled in the slot 13, the vibration isolation pad 8 is also made of rubber plate, the connector 10 is fixedly sleeved on the outer wall of the bearing sleeve 7, the motor shaft of the motor body 2 is fixedly sleeved on the inner wall of the bearing sleeve 7, and the vibration transmission influence of the motor shaft of the motor body 2 on the connector 10 is reduced through the vibration isolation pad 8.

[0026] The damping pin 6 comprises a sleeve 601 and a push rod 602 movably sleeved in the sleeve 601, a piston 603 is movably connected in the sleeve 601, one end of the push rod 602 is fixedly connected to the piston 603, the other end of the push rod 602 is fixedly connected to the inner wall of the sound-absorbing plate 14, when the push rod 602 is displaced, the piston 603 will generate friction with the inner wall of the sleeve 601, and under the action of air pressure, the damping pin 6 can inhibit the repeated movement of the spring 5, thereby achieving the damping effect.

[0027] Working principle: when in use, the propeller blades 12 fixedly installed between the connector 10 and the mounting plate 11 are driven to rotate by the motor body 2, when the motor body 2 works, the vibration generated on the side thereof is reduced through the vibration isolation plate 3, the restoring force is provided through the spring 5, and the resistance is generated through the damping pin 6, so that the energy in the system is consumed, thereby reducing the vibration generated on the upper and lower surfaces of the motor body 2, so that the motor body 2 moves more stably and the noise is smaller, and the sound-absorbing plate 14 arranged on the inner wall of the motor housing 1 further plays a role in reducing noise, then the vibration isolation pad 8 sleeved in the bearing sleeve 7 and the plurality of arc-shaped openings 9 opened on the vibration isolation pad 8 play a role in reducing the vibration generated by the motor shaft of the motor body 2, thereby reducing the vibration propagation and reducing the noise during the operation of the propeller.

[0028] The above describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above embodiments, and the above embodiments and descriptions in the specification are only the principles of the present application, and various changes and improvements can be made without departing from the spirit and scope of the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection claimed by the present application is defined by the appended claims and their equivalents.

Claims

1. A drone propeller with noise reduction function, comprising a motor shell (1) and a propeller blade (12), characterized in that: The motor shell (1) is provided with a motor body (2), the motor shaft outer wall of the motor body (2) is sleeved with a bearing sleeve (7), the outer end of the bearing sleeve (7) is fixedly connected with a connector (10), the motor shaft upper end of the motor body (2) is fixedly connected with a mounting plate (11), the mounting plate (11) and the connector (10) are fixedly connected with the propeller blade (12), the bearing sleeve (7) is provided with a notch (13), the notch (13) is sleeved with a vibration isolation pad (8), the vibration isolation pad (8) is provided with an arc-shaped opening (9), the inner wall of the motor shell (1) is fixedly connected with a sound-absorbing plate (14), the side wall of the motor body (2) is fixedly connected with a vibration isolation plate (3), the upper and lower outer walls of the motor body (2) are fixedly connected with mounting rings (4), the inner walls of the mounting rings (4) and the sound-absorbing plate (14) are fixedly connected with springs (5) and damping pins (6) respectively.

2. The drone propeller with noise reduction function according to claim 1, characterized in that: The propeller blade (12) is provided with two, and the two propeller blades (12) are fixedly connected on both sides of the upper end surface of the connector (10).

3. The drone propeller with noise reduction function according to claim 1, characterized in that: The vibration isolation pad (8) is filled in the notch (13), the connector (10) is fixedly sleeved on the outer wall of the bearing sleeve (7), and the motor shaft of the motor body (2) is fixedly sleeved on the inner wall of the bearing sleeve (7).

4. The drone propeller with noise reduction function according to claim 1, characterized in that: The number of arc-shaped openings (9) is provided with a plurality of, and a plurality of arc-shaped openings (9) are evenly distributed on the vibration isolation pad (8).

5. The drone propeller with noise reduction function according to claim 1, characterized in that: The spring (5) is movably sleeved on the outer end of the damping pin (6), the number of the spring (5) and the damping pin (6) is provided with a plurality of, and a plurality of the spring (5) and the damping pin (6) are evenly distributed.

6. The drone propeller with noise reduction function according to claim 1, characterized in that: The damping pin (6) comprises a sleeve (601) and a push rod (602) slidably sleeved in the sleeve (601), a piston (603) is slidably connected in the sleeve (601), one end of the push rod (602) is fixedly connected with the piston (603), and the other end of the push rod (602) is fixedly connected with the inner wall of the sound-absorbing plate (14).

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