WO2020103254A1

WO2020103254A1 - Power device and unmanned aerial vehicle

Info

Publication number: WO2020103254A1
Application number: PCT/CN2018/122122
Authority: WO
Inventors: 王建伟
Original assignee: 深圳市大疆创新科技有限公司
Priority date: 2018-11-20
Filing date: 2018-12-19
Publication date: 2020-05-28
Also published as: CN209209043U; CN111372853A

Abstract

Disclosed are a power device and an unmanned aerial vehicle. The power device is used for providing power for an aerial vehicle, and comprises: a propeller (100); an electric motor (200) that is provided with a mounting part (221) and is transmittingly connected with the propeller (100); a fitting structure (300) that penetrates through the mounting part (221); and a fastening member (400) that penetrates through the propeller (100) and is connected with the fitting structure (300), so that the propeller (100) is fixed on the electric motor (200). The mounting part (221) is in interference fit with the fitting structure (300). The power device and the unmanned aerial vehicle provided by the present invention are aimed at improving the clamping stability of the blades (110) and the electric motor (200), and improving the stability of the operation of the electric motor.

Description

Power plant and drone

Technical field

The invention relates to the technical field of power devices, in particular to a power device and a drone.

Background technique

Unmanned aerial vehicles have the advantages of flexible maneuverability, fast response, unmanned flight, and easy control. They are widely used in many fields, specifically in power, communications, meteorology, agriculture, ocean, exploration, photography, disaster prevention and reduction, crops Estimated production, anti-drug and anti-smuggling, border patrol, public security and anti-terrorism.

UAVs usually include power devices for providing flying power to the UAVs. The power device usually includes a propeller and a motor connected to the propeller. At present, the propeller is mainly connected to the motor through a connection structure such as snaps and threads. However, for larger unmanned aerial vehicles, the propellers used are relatively large, and the propellers also bear a large force. During the operation of the power plant, the above-mentioned connection structure may cause the buckle to break or fail due to long-term rotation and pulling. The thread wear causes the clamping between the blade and the motor to loosen, resulting in unbalanced motor operation.

Summary of the invention

The invention provides a power device and an unmanned aerial vehicle, aiming to improve the clamping stability of the blade and the motor and improve the stability of the motor operation.

A power device for powering an aircraft, including: a propeller; a motor, which has a mounting part, and a drive connection with the propeller; a matching structure, which penetrates the mounting part; a fastener, which penetrates the propeller and It is connected with the mating structure to fix the propeller on the motor; wherein, the mounting portion and the mating structure are interference fit.

In the power device of the present invention, the fitting structure is a shaft-shaped member, and the mounting portion is a hole structure.

In the power device of the present invention, the mating structure is provided with an opening portion penetrating along the axial direction of the mating structure, and the fastener is connected to an end of the opening portion facing away from the motor.

In the power plant of the present invention, the propeller includes: at least two blades, the blades each have a first through-hole portion, the cooperating structure penetrates the first through-hole portion; the paddle clip is provided on The blade is away from the side of the motor and has a second through-hole portion. The fastener penetrates the second through-hole portion and is connected to the mating structure.

In the power device of the present invention, the mating structure includes: a mating portion that is interference-fitted with the mounting portion; a pivoting portion that extends along the mating portion toward one end of the blade, and is in contact with the first The through-hole portion is pivotally connected; the limiting portion extends along the end of the fitting portion facing away from the blade, and abuts the end of the mounting portion facing away from the blade to limit the fitting structure.

In the power device of the present invention, the circumferential dimension of the fitting portion is greater than the inner diameter of the mounting portion; the circumferential dimension of the limiting portion is greater than the circumferential dimension of the fitting portion.

In the power device of the present invention, the fitting structure further includes: a resisting portion, extending along an end of the pivotal portion facing away from the mounting portion, and abutting the paddle clip.

In the power device of the present invention, the second through-hole portion includes: a first hole, the inner diameter of the first hole is smaller than the inner diameter of the resisting portion, for the fastener to pass through; the second The hole extends along the first hole toward one end of the paddle, the resisting portion is provided in the second hole, and the inner diameter of the second hole is larger than the inner diameter of the first hole.

In the power plant of the present invention, the motor includes a rotor assembly, the rotor assembly has a drive shaft, the mounting portion is provided on the rotor assembly; the paddle clip is provided with a sleeve portion, and the sleeve The part is sleeved on one end of the driving shaft facing the motor.

In the power plant of the present invention, the sleeve portion is provided in the middle of the paddle clip.

In the power plant of the present invention, the power plant further includes: a first pretensioning member, disposed between the blade and the motor, and sleeved on the mating structure, for pretensioning the The blade and the motor; and / or the second pre-tensioning member is provided between the blade and the blade clamp, and is sleeved on the matching structure for pre-tensioning the blade and the rotor Said paddle clip.

In the power plant of the present invention, the power plant further includes: a first lubricating member provided between the first pretensioning member and the blade, for lubricating the propeller and the first A pretensioning member; and / or a second lubricating member provided between the second pretensioning member and the blade, for lubricating the propeller and the second pretensioning member in relative motion.

In the power device of the present invention, both the first pretensioning member and the second pretensioning member are wear-resistant gaskets; the first lubricating member and the second lubricating member are lubricating gaskets.

In the power device of the present invention, the propeller is provided with a stop structure for limiting the rotation range of the blade.

An unmanned aerial vehicle includes: a fuselage; an arm, which is provided on the fuselage; a power device as described above, the power device is provided at one end of the arm, and is used to provide the drone Flight power.

The embodiment of the present invention provides a power device and an unmanned aerial vehicle. The mounting part on the motor is fixedly connected to the matching structure through interference fit, and the fastener penetrates the propeller and connects with the matching structure to realize the assembly of the motor and the propeller. The fitting structure is slightly deformed along the circumferential direction of the mounting portion under the pressing of the mounting portion, so that the distance between the fitting structure and the mounting portion is reduced, so that the fitting structure is reliably installed on the motor. In addition, the matching structure penetrates the propeller through the fastener and is connected to the matching structure. The cooperation between the matching structure and the fastener can assemble the propeller, the motor, and the matching structure firmly and reliably, effectively avoiding the installation between the motor and the matching structure. The clamp is loose, thereby improving the reliability and stability of the motor's work and ensuring the balance of the motor's operation.

BRIEF DESCRIPTION

In order to more clearly explain the technical solutions of the embodiments of the present invention, the drawings required in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present invention. Ordinary technicians can obtain other drawings based on these drawings without creative work.

1 is a schematic structural diagram of a power device provided by an embodiment of the present invention;

2 is an exploded schematic view of the power plant in FIG. 1;

3 is a schematic cross-sectional view of the power device in FIG. 1;

4 is a partially enlarged schematic view of the power device in FIG. 3 at A;

FIG. 5 is a schematic structural diagram of a drone provided by an embodiment of the present invention.

Description of reference signs:

100, propeller; 110, blade; 111, connecting member; 112, blade; 113, first through-hole portion; 120, paddle clamp; 121, second through-hole portion; 1211, first hole; 1212, second hole ; 1213, step surface; 122, sleeve portion; 123, positioning groove; 130, stop structure; 131, protruding portion; 132, stop portion;

200, motor; 210, drive shaft; 220, upper cover; 221, mounting part; 222, boss;

300, matching structure; 310, matching part; 320, pivotal part; 330, limit part; 340, opening part; 350, resisting part;

400, fasteners; 410, connecting parts; 420, engaging parts;

500, the first preload; 600, the second preload; 700, the first lubricating piece; 800, the second lubricating piece;

900, drone; 910, fuselage; 920, arm.

detailed description

The technical solutions in the embodiments of the present invention will be described clearly and completely in the following with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.

It should also be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used in this specification and the appended claims, unless the context clearly dictates otherwise, the singular forms "a", "an", and "the" are intended to include the plural form.

It should also be further understood that the term "and / or" used in the description of the present invention and the appended claims refers to any and all possible combinations of one or more of the associated listed items and includes these combinations .

Example one

Please refer to FIGS. 1 to 4. This embodiment provides a power device including a propeller 100, a motor 200, a matching structure 300 and a fastener 400.

Please refer to FIGS. 1 to 3, wherein the propeller 100 is installed on the motor 200. The propeller 100 may be a forward propeller or a reverse propeller. The positive propeller refers to a propeller that rotates counterclockwise from the rear of the motor 200 toward the head of the motor 200 to generate lift. The reverse propeller refers to a propeller that rotates clockwise from the rear of the motor 200 toward the head of the motor 200 to generate lift.

The number and structure of the propeller 100 are not limited, and the electronic device such as a drone can be driven under the drive of the motor 200. Specifically, the number of propellers 100 may be any suitable number, such as one or more (two, three, or more).

Specifically, the propeller 100 includes a blade 110 and a blade clamp 120.

The number of blades 110 can be designed according to actual needs, for example, two, three, four or more. The number of mating structures 300 corresponds to the number of blades 110. In this embodiment, the number of blades 110 is at least two. Each blade 110 includes a connection member 111 and a blade 112 extending from the connection member 111. The opposite sides of the connecting member 111 are connected to the paddle clip 120 and the motor 200, respectively. At least two connecting members 111 each have a first through-hole portion 113 for the fitting structure 300 to pass through to connect the paddle clip 120 and the motor 200.

In this embodiment, the paddle clip 120 is located on the side of the blade 110 facing away from the motor 200, and is used to fix the blade 110 and the motor 200. The paddle clip 120 is provided with a second through-hole portion 121 and a sleeve portion 122.

It can be understood that, according to different numbers of the blades 110, the number of the second through-hole portions 121 may be designed according to actual requirements, for example, two, three, four, or more. When the number of blades 110 is plural, the number of second through-hole portions 121 is plural. The plurality of second through-hole portions 121 are spaced apart on a circumference centered on the center of the sleeve portion 122.

Preferably, the plurality of second through-hole portions 121 are centered on the center of the sleeve portion 122, and the space between the two adjacent sleeve portions 122 is the same arc to balance the torque of the plurality of blades 110, so that the plurality of blades The torque of the blade 110 is substantially the same, so that the entire propeller 100 rotates about the axis of the drive shaft 210 of the motor 200 as a center, and prevents the propeller 100 from shaking or swinging relative to the motor 200 when the motor 200 is running. In this embodiment, the number of the second through-hole portions 121 is two, and the two second through-hole portions 121 are symmetrical about the center of the sleeve portion 122.

Please refer to FIGS. 2 to 4. In this embodiment, the sleeve 122 is used to connect the propeller 100 to the drive shaft 210 of the motor 200, so that the motor 200 drives the propeller 100 to rotate. Specifically, the sleeve 122 is sleeved on one end of the drive shaft 210. The sleeve 122 may be a through hole or a blind hole. When the sleeve portion 122 is a blind hole, the opening of the sleeve portion 122 is disposed toward the side of the propeller 100, and the drive shaft 210 of the power supply machine 200 is passed through to realize the connection between the drive shaft 210 and the sleeve portion 122.

It can be understood that the blade 110 is rotatably connected to the mating structure 300. When the power device is not in use, the blade 110 can be rotated relative to the mating structure 300, which reduces the space occupied by the power device and facilitates storage and carrying. In order to prevent the rotation angle of the blade 110 from being too large, the propeller 100 is further provided with a stop structure 130 for limiting the rotation range of the blade 110.

In this embodiment, the stop structure 130 includes a protrusion 131 provided on the paddle clip 120 and a stop 132 provided on the blade 110. When the blade 110 rotates to the protrusion 131 and the stop 132 When abutting, the stopper 132 can limit the protrusion 131 to limit the rotation range of the blade 110. In an embodiment, the stop portion 132 may be a card slot. In other embodiments, the specific structure of the stopper 132 can be designed according to actual needs, such as a slope, as long as the stopper 132 cooperates with the protrusion 131 to limit the rotation range of the blade 110.

It can be understood that in other embodiments, the stop structure 130 may be designed according to actual needs. For example, the stop structure 130 may include a stop portion provided on the paddle clip 120 and a protrusion provided on the blade 110, as long as The stop structure 130 can limit the rotation range of the blade 110.

Please refer to FIGS. 2 to 4. In this embodiment, the motor 200 includes a rotor assembly, a stator assembly, and a drive shaft 210. The rotor assembly includes an upper cover 220, and the drive shaft 210 penetrates the upper cover 220 and is in drive connection with the propeller 100. The rotor assembly can rotate around the drive shaft 210 under the action of the electromagnetic field generated after the stator assembly is energized, thereby driving the propeller 100 to rotate.

It should be noted that the terms of up, down, bottom, top, etc. appearing in the description of the embodiments of the present invention are that the motor 200 is installed in an electronic device such as an unmanned aerial vehicle. Restrictive.

The motor 200 is usually a brushed motor or a brushless motor. In this embodiment, it mainly refers to a brushless motor. The number of motors 200 can be designed according to actual needs. In this embodiment, the number of motors 200 is four, and each motor 200 corresponds to driving one propeller 100 to rotate. It can be understood that, in other embodiments, the number of motors 200 may be set to any other suitable number according to specific design requirements, such as one, two, three, five, six, or more.

The upper cover 220 is provided with a mounting portion 221. The fitting structure 300 penetrates the mounting portion 221 and is interference fit with the mounting portion 221. The fitting structure 300 is slightly deformed in the circumferential direction of the mounting portion 221 under the pressing of the mounting portion 221, so that the distance between the fitting structure 300 and the mounting portion 221 is reduced, so that the fitting structure 300 is reliably mounted on the motor 200.

In this embodiment, the fitting structure 300 is a shaft-shaped member, and the mounting portion 221 is a hole structure. Among them, the interference fit between the fitting structure 300 and the mounting portion 221 includes at least the following three types:

The first way: press-fit. Specifically, at normal room temperature, the fitting structure 300 and the mounting portion 221 are pressed to achieve an interference fit between the fitting structure 300 and the mounting portion 221.

The second way: pre-tightening assembly. Specifically, the fitting structure 300 is inserted into the mounting portion 221 heated to a high temperature. As the temperature of the mounting portion 221 drops to a normal temperature, the circumferential dimension of the inner wall of the mounting portion 221 is reduced accordingly. When the circumferential dimension of the fitting inner wall of the mounting portion 221 is equal to or smaller than the circumferential dimension of the fitting outer wall of the fitting structure 300, the inward contraction reaction force applied to the fitting outer wall of the fitting structure 300 by the fitting inner wall of the fitting portion 221 will fit The structure 300 is fixed in the mounting portion 221.

The third way: cold loading. Specifically, the fitting structure 300 cooled to a low temperature is inserted into the mounting portion 221. As the temperature of the mounting portion 221 rises back to normal temperature, the circumferential dimension of the outer wall of the fitting structure 300 increases accordingly. When the circumferential dimension of the fitting outer wall of the fitting structure 300 is equal to or greater than the circumferential dimension of the fitting inner wall of the mounting portion 221, the outward expansion reaction force exerted by the fitting outer wall of the fitting structure 300 fixes the fitting structure 300 in the mounting portion 221 .

It should be noted that the interference fit method between the mating structure 300 and the mounting portion 221 is not limited to the above three, and any method that can interference fit the mating structure 300 and the mounting portion 221 should fall within the protection scope of this embodiment. Inside. In addition, even for the entire circumference, the assembly state of the interference fit does not have to depend on the dimensional error of the assembly part or based on design requirements. Even in the case where the assembly is partially performed as a transition fit or a loose fit, when the combination of the two parts is basically established by press fitting, pre-tensioning fitting, or cold fitting, the assembly is generally regarded as an interference fit.

Referring to FIGS. 2 to 4, the matching structure 300 includes a matching portion 310, a pivoting portion 320, a limiting portion 330 and an opening portion 340.

The fitting portion 310 is provided in the mounting portion 221 and is interference-fitted with the mounting portion 221. When the mating structure 300 is assembled with the motor 200, the interference fit between the mating portion 310 and the mounting portion 221 causes the mounting portion 221 to completely lock the mating portion 310 in the radial direction to avoid the diameter of the mating structure 300 during the operation of the motor 200. It is shifted in the direction to avoid loosening of the clamping between the motor 200 and the matching structure 300, thereby improving the reliability and stability of the operation of the motor 200 and ensuring the balance of the operation of the motor 200.

In one embodiment, the circumferential dimension of the fitting outer wall of the fitting portion 310 is larger than the circumferential dimension of the fitting outer wall of the mounting portion 221. The fitting part 310 cooled to a low temperature is inserted into the mounting part 221. As the temperature of the mounting portion 221 rises back to the normal temperature, the circumferential dimension of the fitting portion 310 increases accordingly, so that the fitting portion 310 is fixed in the mounting portion 221 to achieve an interference fit connection between the fitting structure 300 and the upper cover 220.

In this embodiment, the interference between the fitting portion 310 and the mounting portion 221 can be selected according to actual needs, for example, 0.4 mm 0.6 mm. That is, the interference between the fitting structure 300 and the mounting portion 221 is 0.4 mm, 0.45 mm, 0.50 mm, 0.55 mm, 0.60 mm, and any value between the above-mentioned adjacent values.

In an alternative embodiment, the outer wall of the fitting portion 310 can be designed into any shape according to actual requirements, so that the friction between the fitting portion 310 and the mounting portion 221 can be increased. For example, the fitting outer wall of the fitting part 310 may be designed as a plurality of concentric ring-shaped protrusions or a plurality of strip-shaped and wave-shaped protrusions arranged at intervals; or, the fitting outer wall of the fitting part 310 may also be designed as a plurality of irregular The bump or concave hole structure ensures that the outer wall of the fitting part 310 is a rough surface, and increases the friction between the fitting part 310 and the mounting part 221. It can be understood that the fitting portion 310 may be distributed in one or more partial regions of the hole wall of the mounting portion 221 or may be distributed in the entire hole wall of the mounting portion 221.

Please refer to FIGS. 3 and 4. In this embodiment, the pivoting portion 320 extends along the mating portion 310 toward one end of the blade 110, and is pivotally connected to the first through-hole portion 113. The pivoting portion 320 is pivotally connected to the first through-hole portion 113, so that the connecting member 111 of the blade 110 can rotate relative to the pivoting portion 320 to be folded or unfolded, which is convenient for storage and carrying.

Please refer to FIGS. 3 and 4. In this embodiment, the limiting portion 330 extends along an end of the fitting portion 310 facing away from the blade 110, and is used for limiting the fitting structure 300. The circumferential dimension of the limiting portion 330 is greater than the circumferential dimension of the inner wall of the mounting portion 221. When the fitting structure 300 is assembled with the mounting portion 221, the fitting portion 310 and the pivoting portion 320 penetrate the mounting portion 221, and the limiting portion 330 can abut the end of the mounting portion 221 facing away from the blade 110 to restrict the fitting structure 300 Installation location. It can be understood that, in other embodiments, the limiting portion 330 may be omitted.

Please refer to FIG. 3 and FIG. 4. In this embodiment, the opening portion 340 may be a through-hole structure, which is disposed along the axial direction of the mating structure 300. It can be understood that in other embodiments, the opening portion 340 may also be designed as any other suitable structure according to actual needs, such as a blind hole structure, and the opening of the blind hole structure is provided at the end of the mating structure 300 facing the propeller 100.

In this embodiment, the material of the mating structure 300 can be selected according to actual needs, such as wear-resistant metal or composite material. The wear-resistant metal can be stainless steel or aluminum alloy. The shape of the matching structure 300 can be designed into any suitable shape according to actual requirements, such as a square columnar shape, a cylindrical shape, or the like.

As an optional embodiment, the mating surface of the mating structure 300 for the mounting portion 221 may be surface-treated to improve the mechanical strength, wear resistance, corrosion resistance, heat resistance, fatigue resistance and / or Or antioxidant.

It should be noted that the specific structure of the interference fit between the fitting structure 300 and the mounting portion 221 is not limited to the structure described above. For example, the fitting structure 300 may be a hole structure and the mounting portion 221 may be a shaft-shaped member. The structures of the interference fit of the fitting structure 300 and the mounting portion 221 should all fall within the protection scope of this embodiment.

3 and 4, the fastener 400 includes a connecting portion 410 and an engaging portion 420 provided at one end of the connecting portion 410. The connecting portion 410 penetrates the second through-hole portion 121 and is connected to the matching structure 300. The engaging portion 420 is for abutting the end of the second through-hole portion 121 facing away from the blade 110 to limit the connecting portion 410. It can be understood that the connection portion 410 and the mating structure 300 can select any suitable connection method according to actual needs, such as snap-fitting, screw connection, and the like.

Please refer to FIGS. 3 and 4 again. In this embodiment, the outer periphery of the connecting portion 410 is provided with an external thread, and the inner wall of the opening portion 340 is provided with an internal thread. The internal thread fits to realize the connection between the opening portion 340 and the connecting portion 410 to lock and fix the paddle clip 120 and the paddle 110 to the motor 200.

When assembling, the matching structure 300 is threaded through the mounting portion 221 of the upper cover 220, the driving shaft 210 of the motor 200 is threaded through the corresponding position of the upper cover 220, and the interference between the matching structure 300 and the mounting portion 221 is made by interference. The driving shaft 210 is assembled with other parts of the motor 200 to complete the assembly of the motor 200 and the mating structure 300. The first through-hole portion 113 of the paddle 110 is sleeved on the fitting structure 300, and the drive shaft 210 of the motor 200 is connected to the sleeved portion 122 of the paddle clip 120. The fastener 400 is passed through the second through-hole portion 121 of the paddle clip 120 and connected with the matching structure 300 to lock the paddle clip 120, the blade 110 and the upper cover 220 to complete the assembly of the power device.

Example 2

It can be understood that when the fastener 400 and the mating structure 300 are screwed, because the fastener 400 is screwed to the maximum, the fastener 400 cannot lock and fix the paddle clip 120 and the paddle 110 to On the motor 200, the clamp between the motor 200 and the propeller 100 is easy to loosen.

Please refer to FIG. 2 to FIG. 4. In view of the above problems, in this embodiment, based on the first embodiment, the second through-hole portion 121 is designed to include a first hole 1211 and a second hole 1212; the matching structure 300 further includes a resisting Part 350 to further improve the connection reliability between the motor 200 and the propeller 100. The fastener 400 penetrates the first hole 1211 and the second hole 1212 and is connected to the opening portion 340.

In this embodiment, the inner diameter of the first hole 1211 is smaller than the inner diameter of the resisting portion 350. The inner diameter of the first hole 1211 is greater than or equal to the circumferential dimension of the connecting portion 410. The second hole 1212 extends from the first hole 1211 toward one end of the blade 110, and the inner diameter of the second hole 1212 is larger than the inner diameter of the first hole 1211 to form a stepped surface 1213 at the junction of the first hole 1211 and the second hole 1212 ，以限位配结构 300。 The limit with the structure 300.

Referring to FIGS. 2 to 4, the resisting portion 350 extends along an end of the pivot portion 320 facing away from the mounting portion 221, and is used to limit the screwing depth of the fastener 400 in the opening portion 340. When the motor 200 and the propeller 100 are clamped and fixed, as the connection area of the fastener 400 and the opening portion 340 increases, the end of the resisting portion 350 facing the blade clamp 120 and the stepped surface 1213 of the second through-hole portion 121 The distance between them decreases. When the end of the resisting portion 350 facing the paddle clip 120 abuts on the step surface 1213, the fastener 400 is difficult to move further toward the motor 200, and it is difficult to lock the propeller 100 and the motor 200 when the fastener 400 is tightened to the maximum , Thereby improving the reliability and stability of the clamping between the motor 200 and the propeller 100.

It can be understood that the structure of the second through-hole portion 121 and the resisting portion 350 is not limited to the above design, and any structure that can limit the screwing depth of the fastener 400 at the opening portion 340 is within the protection scope of this embodiment . For example, the hole wall of the second through-hole portion 121 is designed with an annular flange that cooperates with the resisting portion 350 to define the screwing depth of the fastener 400 in the opening portion 340.

Example Three

Please refer to FIG. 2 to FIG. 4 again. The structure of the power device of the third embodiment is substantially the same as that of the first embodiment. The difference is that the power device of the third embodiment further includes the first pre-tensioner on the basis of the second embodiment 500, a second pre-tensioning member 600, a first lubricating member 700 and a second lubricating member 800.

Please refer to FIGS. 2 to 4. In this embodiment, the first pretensioning member 500 is disposed between the blade 110 and the motor 200, and is sleeved on the matching structure 300 for pretensioning the blade 110 and the motor 200 . Specifically, opposite sides of the first pretensioning member 500 are elastically pressed against the blade 110 and the upper cover 220 of the motor 200, so that there is an elastic pre-tension between the blade 110 and the motor 200 along the length of the mating structure 300 The tight force further prevents the blade 110 from loosening and improves the stability and reliability of the connection between the blade 110 and the motor 200.

Please refer to FIG. 2 to FIG. 4. In this embodiment, the second pretensioning member 600 is disposed between the blade 110 and the blade clamp 120 and is sleeved on the matching structure 300 for pretensioning the blade 110 and the blade Clip 120. Specifically, opposite sides of the second pretensioning member 600 are elastically pressed against the blade 110 and the blade clamp 120 respectively, so that there is an elastic pretensioning force along the length direction of the fitting structure 300 between the blade 110 and the blade clamp 120 In order to further prevent the blade 110 from loosening and improve the stability and reliability of the connection between the propeller 100 and the motor 200.

It can be understood that the upper cover 220 is provided with a boss 222 for adapting to the first pretension 500. The paddle clip 120 is provided with a positioning groove 123 and is adapted to the second pretensioning piece 600 for positioning the second pretensioning piece 600.

In this embodiment, the shapes of the first pretensioning member 500 and the second pretensioning member 600 can be designed into any suitable shape according to actual needs, for example, substantially circular, square, or any other suitable shape. Similarly, the first pre-tensioning member 500 and the second pre-tensioning member 600 can select any suitable material according to actual needs, and can have wear resistance and pre-tensioning effect, for example, using Teflon or other wear-resistant engineering plastics Made of other materials. In one embodiment, both the first pretensioning member 500 and the second pretensioning member 600 are wear-resistant gaskets made of polytetrafluoroethylene.

It can be understood that the number, thickness, and hardness of the first pretensioning member 500 and the second pretensioning member 600 can be designed according to actual requirements, and this embodiment is not limited. In this embodiment, the first pretensioning member 500 and the second pretensioning member 600 may be provided at the same time to provide an elastic pretensioning force along the length of the mating structure to prevent loosening of the clamping between the motor 200 and the propeller 100. It can be understood that in other embodiments, one of the first pretensioning member 500 and the second pretensioning member 600 may also be provided to provide an elastic pretensioning force along the length of the mating structure 300 to prevent the motor 200 from The clamping between the propellers 100 is loose.

Please refer to FIGS. 2 to 4. In this embodiment, the first lubricating member 700 is disposed between the first pretensioning member 500 and the blade 110, and is used to lubricate the relative movement of the blade 110 and the first pretensioning member 500. . The second lubricating member 800 is provided between the second pretensioning member 600 and the blade 110 for lubricating the relative moving blade 110 and the second pretensioning member 600.

It can be understood that the materials, number, thickness, and hardness of the first lubricating member 700 and the second lubricating member 800 can be designed according to actual requirements. In this embodiment, the first lubricating member 700 and the second lubricating member 800 are lubricating gaskets, for example, lubricating gaskets made of graphite or polytetrafluoroethylene.

Please refer to FIGS. 2 to 4 again. In this embodiment, the number of the first lubricating member 700 and the second lubricating member 800 are two. For ease of description, the first lubricating member 700 is taken as an example for description. One of the two first lubricating members 700 is fixed to the blade, and the other of the first pre-tensioning member 500 and the two first lubricating members 700 is fixed to the upper cover 220 of the motor 200. The static friction between one of the first lubricating members 700 and the blade 110 and the static friction between the other of the first lubricating members 700 and the blade 110 are greater than between the two first lubricating members 700 Static friction. Therefore, the relative motion occurs between the two first lubricating members 700, which effectively reduces the wear between the blade 110 and the motor 200.

When assembling, the matching structure 300 is threaded through the mounting portion 221 of the upper cover 220, the driving shaft 210 of the motor 200 is threaded through the corresponding position of the upper cover 220, and the interference between the matching structure 300 and the mounting portion 221 is made by interference. The driving shaft 210 is assembled with other parts of the motor 200 to complete the assembly of the motor 200 and the mating structure 300. The first pre-tensioning member 500, the first lubricating member 700, the first through-hole portion 113 of the blade 110, the second lubricating member 800, and the second pre-tensioning member 600 are sleeved on the fitting structure 300. The drive shaft 210 of the motor 200 is connected to the sleeve 122 of the paddle clip 120. The fastener 400 is passed through the second through-hole portion 121 of the paddle clip 120 and connected with the matching structure 300 to lock the paddle clip 120, the blade 110 and the upper cover 220 to complete the assembly of the power device.

Please refer to FIG. 5, a drone 900 provided by an embodiment of the present invention is used to carry a load, such as a camera or a camera. The drone 900 may specifically be a multi-rotor drone, a fixed-wing drone, or an unmanned helicopter. The drone 900 includes a fuselage 910, an arm 920, and a power device for providing flying power to the drone, and the arm 920 extends from the fuselage 910.

The power device may be disposed at any suitable part of the arm 920. For example, the power device may be provided at the end of the arm 920 or near the end of the arm 920. In some embodiments, the drone 900 includes at least two arms 920 that are disposed around the fuselage 910 symmetrically or asymmetrically. Each arm 920 can support one power device or multiple power devices. Each arm 920 may carry a different number of power devices, or may carry the same number of power devices.

In this embodiment, eight power devices are provided on one drone 900, and are respectively installed on the eight arms 920 of the drone 900. However, it is understandable that other suitable numbers, types or arrangements of the power plant are implementable.

In the power device and the unmanned aerial vehicle provided by the above embodiment, the fitting structure 300 is slightly deformed along the circumferential direction of the mounting portion 221 under the pressing of the mounting portion 221, so that the distance between the fitting structure 300 and the mounting portion 221 is reduced, thereby The fitting structure 300 is reliably installed on the motor 200. In addition, the mating structure 300 penetrates the propeller 100 through the fastener 400 and is connected to the mating structure 300. The mating structure 300 and the fastener 400 can make the propeller 100, the motor 200, and the mating structure 300 be firmly assembled, the connection is reliable, and effective The loose clamping between the motor 200 and the mating structure 300 is avoided, thereby improving the reliability and stability of the operation of the motor 200 and ensuring the balanced operation of the motor 200.

The above are only specific embodiments of the present invention, but the scope of protection of the present invention is not limited to this. Any person skilled in the art can easily think of various equivalents within the technical scope disclosed by the present invention. Modifications or replacements, these modifications or replacements should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

A power device for powering an aircraft, characterized in that it includes:

propeller;

The motor has a mounting portion and is connected to the propeller drive;

Cooperate with the structure, pierce the installation part;

Fasteners through the propeller and connected with the matching structure, so that the propeller is fixed on the motor;

Wherein, the mounting part and the cooperating structure are interference fit.
The power plant according to claim 1, wherein the fitting structure is a shaft-shaped member, and the mounting portion is a hole structure.
The power device according to claim 2, wherein the matching structure is provided with an opening portion penetrating along the axial direction of the matching structure, and the fastener is connected to the opening portion away from the motor At the end.
The power plant according to claim 2, wherein the propeller includes:

At least two blades, each of which has a first through-hole portion, and the matching structure penetrates the first through-hole portion;

The paddle clip is provided on the side of the paddle blade facing away from the motor, and has a second through-hole portion, and the fastener penetrates the second through-hole portion and is connected to the matching structure.
The power plant according to claim 4, wherein the cooperating structure includes:

The cooperating part is interference fit with the installation part;

The pivoting portion extends along the mating portion toward one end of the blade and pivotally connects with the first through-hole portion;

A limiting portion extends along an end of the fitting portion facing away from the blade, and abuts an end of the mounting portion facing away from the blade to limit the fitting structure.
The power device according to claim 5, wherein the circumferential dimension of the fitting portion is greater than the inner diameter of the mounting portion; the circumferential dimension of the limiting portion is greater than the circumferential dimension of the fitting portion.
The power plant according to claim 5, wherein the cooperating structure further comprises:

The resisting portion extends along an end of the pivotal portion facing away from the mounting portion, and contacts the paddle clip.
The power plant according to claim 7, wherein the second through-hole portion includes:

A first hole, the inner diameter of the first hole is smaller than the inner diameter of the resisting portion, and is used for the fastener to pass through;

The second hole extends along the first hole toward one end of the paddle, the resisting portion is provided in the second hole, and the inner diameter of the second hole is larger than the inner diameter of the first hole.
The power plant according to claim 4, wherein:

The motor includes a rotor assembly, the rotor assembly has a drive shaft, and the mounting portion is provided on the rotor assembly;

A sleeve portion is provided on the paddle clip, and the sleeve portion is sleeved on an end of the drive shaft facing the motor.
The power plant according to claim 9, wherein the sleeve portion is provided in the middle of the paddle clip.
The power plant according to claim 4, wherein the power plant further comprises:

A first pretensioning member, which is provided between the blade and the motor, and is sleeved on the matching structure for pretensioning the blade and the motor; and / or

The second pretensioning member is arranged between the blade and the blade clamp, and is sleeved on the matching structure, and is used for pretensioning the blade and the blade clamp.
The power plant according to claim 11, wherein the power plant further comprises:

A first lubricating member, provided between the first pretensioning member and the blade, for lubricating the relative motion of the propeller and the first pretensioning member; and / or

A second lubricating member is provided between the second pretensioning member and the blade, and is used for lubricating the propeller and the second pretensioning member moving relatively.
The power device according to claim 12, wherein the first pretensioning member and the second pretensioning member are wear-resistant gaskets; the first lubricating member and the second lubricating member are Lubricate the gasket.
The power plant according to claim 4, wherein the propeller is provided with a stop structure for limiting the rotation range of the blade.
A UAV is characterized by including:

body;

An arm, which is provided on the fuselage; and

A power device, which is provided at one end of the arm and used to provide flying power for the drone, wherein the power device includes:

propeller;

The motor has a mounting portion and is connected to the propeller drive;

Cooperate with the structure, pierce the installation part;

Fasteners through the propeller and connected with the matching structure, so that the propeller is fixed on the motor;

Wherein, the mounting part and the cooperating structure are interference fit.
The drone according to claim 15, wherein the fitting structure is a shaft-shaped member, and the mounting portion is a hole structure.
The UAV according to claim 16, wherein the matching structure is provided with an opening portion penetrating along the axial direction of the matching structure, and the fastener is connected to the opening portion away from the opening One end of the motor.
The drone according to claim 16, wherein the propeller comprises:

At least two blades, each of which has a first through-hole portion, and the matching structure penetrates the first through-hole portion;

The paddle clip is provided on the side of the paddle blade facing away from the motor, and has a second through-hole portion, and the fastener penetrates the second through-hole portion and is connected to the matching structure.
The UAV according to claim 18, wherein the cooperation structure comprises:

The cooperating part is interference fit with the installation part;

The pivoting portion extends along the mating portion toward one end of the blade and pivotally connects with the first through-hole portion;

A limiting portion extends along an end of the fitting portion facing away from the blade, and abuts an end of the mounting portion facing away from the blade to limit the fitting structure.
The drone according to claim 19, wherein the circumferential dimension of the fitting portion is larger than the inner diameter of the mounting portion; the circumferential dimension of the limiting portion is greater than the circumferential dimension of the fitting portion.
The drone according to claim 19, wherein the cooperation structure further comprises:

The resisting portion extends along an end of the pivotal portion facing away from the mounting portion, and contacts the paddle clip.
The drone according to claim 21, wherein the second through-hole portion includes:

A first hole, the inner diameter of the first hole is smaller than the inner diameter of the resisting portion, and is used for the fastener to pass through;

The second hole extends along the first hole toward one end of the paddle, the resisting portion is provided in the second hole, and the inner diameter of the second hole is larger than the inner diameter of the first hole.
The drone according to claim 18, characterized in that

The motor includes a rotor assembly, the rotor assembly has a drive shaft, and the mounting portion is provided on the rotor assembly;

A sleeve portion is provided on the paddle clip, and the sleeve portion is sleeved on an end of the drive shaft facing the motor.
The unmanned aerial vehicle according to claim 23, wherein the sleeve portion is provided in the middle of the paddle clip.
The drone according to claim 18, wherein the power device further comprises:

A first pretensioning member, which is provided between the blade and the motor, and is sleeved on the matching structure for pretensioning the blade and the motor; and / or

The second pretensioning member is arranged between the blade and the blade clamp, and is sleeved on the matching structure, and is used for pretensioning the blade and the blade clamp.
The drone according to claim 25, wherein the power device further comprises:

A first lubricating member, provided between the first pretensioning member and the blade, for lubricating the relative motion of the propeller and the first pretensioning member; and / or

A second lubricating member is provided between the second pretensioning member and the blade, and is used for lubricating the propeller and the second pretensioning member moving relatively.
The drone according to claim 26, characterized in that both the first pretensioning member and the second pretensioning member are wear-resistant gaskets; the first lubricating member and the second lubricating member Lubrication gasket.
The drone according to claim 18, wherein the propeller is provided with a stop structure for limiting the rotation range of the blade.