CN216564876U

CN216564876U - Motor, cloud platform and unmanned aerial vehicle

Info

Publication number: CN216564876U
Application number: CN202123055872.2U
Authority: CN
Inventors: 陈鹏; 徐文康; 徐博
Original assignee: SZ DJI Technology Co Ltd
Current assignee: SZ DJI Technology Co Ltd
Priority date: 2021-12-06
Filing date: 2021-12-06
Publication date: 2022-05-17
Anticipated expiration: 2031-12-06

Abstract

The utility model provides a motor, cloud platform and unmanned aerial vehicle, wherein, this motor includes: the motor shaft is arranged in an inner ring of the bearing in a penetrating mode and used for driving a component to be driven to rotate; the stator assembly comprises a base and a disc winding arranged in the base, and the base is sleeved on an outer ring of the bearing; the rotor assembly comprises a rotatable part, a retainer and a magnet fixed on the retainer, the rotatable part is fixedly connected with the motor shaft, and the retainer is arranged on the rotatable part; the magnets and the disc windings can provide axial magnetic flux changes to drive the rotor assembly to rotate relative to the stator assembly so as to drive the motor shaft to rotate. Therefore, the size of the motor in the axial direction can be reduced, and the miniaturization of a product is facilitated.

Description

Motor, cloud platform and unmanned aerial vehicle

Technical Field

The application relates to the technical field of motors, especially, relate to a motor, use cloud platform and unmanned aerial vehicle of this motor.

Background

The motor can be applied to equipment such as unmanned aerial vehicle or handheld cloud platform in order to provide the power supply, and current motor generally includes stator and rotor and is used for supporting the rotatory bearing of rotor. Present motor generally can adopt two bearings, adopts the duplex bearing system promptly, and the duplex bearing makes the motor great in the ascending size of axial, makes the size and the weight of handheld cloud platform and unmanned aerial vehicle also bigger indirectly, has influenced user experience to a certain extent.

SUMMERY OF THE UTILITY MODEL

The application provides a motor, cloud platform and unmanned aerial vehicle makes the motor size in the axial littleer through the structure of optimizing the motor, and then the miniaturization is realized to products such as cloud platform and unmanned aerial vehicle of being convenient for to improve the competitiveness of product.

In a first aspect, embodiments of the present application provide an electric machine, comprising:

a bearing;

the motor shaft is arranged in the inner ring of the bearing in a penetrating mode and used for driving a part to be driven to rotate;

the stator assembly comprises a base and a disc winding arranged in the base, and the base is sleeved on an outer ring of the bearing;

the rotor assembly comprises a rotatable part, a retainer and a magnet fixed on the retainer, the rotatable part is fixedly connected with the motor shaft, and the retainer is arranged on the rotatable part;

the magnet and the disc winding can provide axial magnetic flux change to drive the rotor assembly to rotate relative to the stator assembly so as to drive the motor shaft to rotate.

In the motor provided by the application, the rotatable part comprises a rotating body and a through hole arranged on the rotating body, and the rotatable part is sleeved on the motor shaft through the through hole; the rotatable component further comprises an annular part, the inner diameter of the annular part is the same as the diameter of the through hole, and the retainer is arranged on the outer side wall of the annular part.

In the motor that this application provided, the motor shaft includes fixed part and connecting portion, the fixed part is used for wearing to establish in the inner circle of bearing, connecting portion are used for connecting rotatable component, wherein, connecting portion are in the radial size of motor is greater than the fixed part is in the radial size of motor.

In the motor that this application provided, connecting portion still include a step portion, through-hole on the rotating body still is equipped with the depressed part rotatable part fixed connection is in during the connecting portion of motor shaft, the step portion laminating is in the depressed part.

In the motor provided by the application, the rotor assembly comprises a first rotor assembly and a second rotor assembly, the first rotor assembly comprises a first retainer and a magnet fixed on the first retainer, the second rotor assembly comprises a second retainer and a magnet fixed on the second retainer, the first retainer and the second retainer are both sleeved on the motor shaft, and the disc winding is located between the first retainer and the second retainer; wherein at least one of the first and second rotor assemblies further comprises a rotatable member.

In the motor provided by the application, the rotatable part is provided with a first connecting piece, and the first connecting piece is used for connecting the part to be driven.

In the motor provided by the application, the base is provided with a second connecting piece, and the second connecting piece is used for connecting the motor to an external component.

In the motor provided by the application, the base comprises a first groove and a second groove, the first groove is used for placing the disc winding, and the second groove is used for placing the bearing.

In the motor provided by the application, the height of the base in the motor axial direction is smaller than the height of the motor shaft in the motor axial direction.

In the motor provided by the application, the retainer comprises a ring-shaped base body and a plurality of supporting arms extending from the ring-shaped base body, and a magnet is placed between every two supporting arms.

In the electric machine provided by the present application, the bearing comprises a four-point contact bearing.

In the electric machine provided by the present application, the disc winding includes a PCB winding or a core winding.

In the motor that this application provided, the motor still includes FPC, FPC sets up on the base, FPC with the coil electric connection of iron core winding.

In a second aspect, the present application further provides a holder, the holder includes a holder body and a holder motor, the holder motor is disposed on the holder body, and the holder motor includes any one of the motors provided in the embodiments of the present application.

In a third aspect, the present application further provides an unmanned aerial vehicle, the unmanned aerial vehicle includes a body and a motor as any one of the embodiments of the present application, the motor is provided on the body.

The embodiment of the application provides a motor, cloud platform and unmanned aerial vehicle, through the structure of the bearing system and the electromagnetic component who has optimized the motor, not only can guarantee the performance of motor, more importantly can reduce the motor at axial size, and then be favorable to realizing the miniaturization of product to promote the competitiveness of product.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an electric machine provided in an embodiment of the present application;

fig. 2 is an exploded view of an electric machine according to an embodiment of the present disclosure;

fig. 3 is a schematic structural diagram of an electric machine provided in an embodiment of the present application;

FIG. 4 is a schematic cross-sectional view of section A-A of FIG. 3;

FIGS. 5a and 5b are schematic structural views of a rotatable member provided in an embodiment of the present application;

fig. 6 is a schematic structural diagram of a motor shaft according to an embodiment of the present application;

fig. 7 is a schematic structural diagram of a base provided in an embodiment of the present application;

fig. 8 is a schematic structural diagram of another motor provided in the embodiment of the present application;

FIG. 9 is a schematic cross-sectional view of section B-B of FIG. 8;

fig. 10 is a schematic structural diagram of a handheld pan/tilt head provided in an embodiment of the present application;

fig. 11 is a schematic structural diagram of an unmanned aerial vehicle provided in an embodiment of the present application.

Description of the main elements and symbols:

100. a motor; 10. a stator assembly; 11. a base; 111. a first groove; 112. a second groove; 113. a second connecting member; 12. a disc winding; 121. a PCB winding; 122. an iron core winding; 1221. an iron core; 1222. winding; 123. a flexible circuit board;

20. a rotor assembly; 21. a rotatable member; 210. rotating the body; 211. a through hole; 212. an annular portion; 213. a first connecting member; 214. a recessed portion; 22. a holder; 220. an annular substrate; 2201. a support arm; 2202. a placement groove; 221. a first holder; 222. a second holder; 23. a magnet;

30. a bearing; 31. an inner ring; 32. an outer ring;

40. a motor shaft; 41. a fixed part; 42. a connecting portion; 420. a step portion;

200. a handheld pan-tilt; 201. a grip portion; 202. a support arm;

300. an unmanned aerial vehicle; 301. a fuselage.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

It is to be understood that the terminology used in the description of the present application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the specification of the present application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should be understood that, for the convenience of clearly describing the technical solutions of the embodiments of the present application, the words "first", "second", and the like are used in the embodiments of the present application to distinguish the same items or similar items with basically the same functions and actions. For example, the first and second grooves are only used for distinguishing different grooves, and the sequence thereof is not limited. Those skilled in the art will appreciate that the terms "first," "second," etc. do not denote any order or quantity, nor do the terms "first," "second," etc. denote any order or importance.

It should be further understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

The motor can be applied to equipment such as unmanned aerial vehicle or handheld cloud platform in order to provide the power supply, and current motor generally includes stator and rotor and is used for supporting the rotatory bearing of rotor. However, the current motor generally adopts two bearings, namely a double-bearing system, the double bearings enable the motor to be large in axial size, indirectly enable the size and weight of the handheld cloud platform and the unmanned aerial vehicle to be large, and influence the user experience to a certain extent.

For this reason, the embodiment of this application provides a motor, cloud platform and unmanned aerial vehicle, and this motor can reduce the motor at axial size when guaranteeing the performance of motor through the structure of optimizing bearing system and electromagnetic component, and then is favorable to realizing the miniaturization of product to promote the competitiveness of product.

Referring to fig. 1 and 2, fig. 1 illustrates a structure of an electric machine 100 according to an embodiment of the present disclosure, and fig. 2 illustrates an exploded structure of the electric machine 100 according to an embodiment of the present disclosure. This motor 100 has less size in the axial, makes cloud platform and the unmanned aerial vehicle that uses this motor from this, can realize littleer and lighter at volume and weight, and then is convenient for promote the competitiveness of cloud platform and unmanned aerial vehicle in like products.

As shown in fig. 1 and 2, the motor 100 includes a stator assembly 10, a rotor assembly 20, a bearing 30, and a motor shaft 40, the stator assembly 10 includes a base 11 and a disc winding 12, the disc winding 12 is disposed in the base 11, the rotor assembly 20 includes a rotatable member 21, a holder 22, and a magnet 23, the magnet 23 is fixed to the holder 22, the rotatable member 21 is fixedly connected to the motor shaft 40, and the holder 22 is disposed on the rotatable member 21.

In the embodiment of the present application, the number of the bearing 30 is one, the bearing 30 includes an inner ring 31 and an outer ring 32, the base 11 is sleeved on the outer ring 32 of the bearing 30, the motor shaft 40 is inserted into the inner ring 31 of the bearing 30, and the motor shaft 40 is used for driving a component to be driven to rotate, such as a propeller for driving an unmanned aerial vehicle to rotate, or a supporting arm for driving a cradle head to rotate. Therefore, the motor 100 provided by the embodiment of the present application is a single bearing structure, and the axial height dimension of the whole motor 100 can be further reduced. Wherein the motor radial direction and the motor axial direction are specifically shown in fig. 3.

For example, the ratio bearing 30 may be a four-point contact bearing, although other types of bearings may be used, but four-point contact bearings have zero play and high stiffness characteristics, with similar or near dual bearing stiffness.

In the embodiment of the present application, by using the disc winding 12, the disc winding 12 and the magnet 23 on the holder 22 form an axial magnetic flux, compared with the conventional radial magnetic flux motor, in order to increase the output torque of the motor, under the condition that the outer diameter is not changed, only the axial dimension of the electromagnetic component (such as the winding) can be increased, and the axial dimension of the radial magnetic flux motor is difficult to be miniaturized due to this limitation, while the axial magnetic flux motor provided by the present application can further compress the size of the motor in the axial direction.

When the disc windings 12 are energized, the magnets 23 and the disc windings 12 can provide axial flux variations to drive the rotor assembly 20 to rotate relative to the stator assembly 10 to rotate the motor shaft 40. This motor rotates through the motor shaft that uses a motor and utilizes axial magnetic flux to change driving motor from this can reduce the motor at the ascending size of axial, and then is favorable to realizing the miniaturization of product to promote the competitiveness of product.

In some embodiments, as shown in fig. 2, the rotor assembly 20 includes a first rotor assembly including a first holder 221 and a magnet 23 fixed on the first holder 221, and a second rotor assembly including a second holder 222 and a magnet 23 fixed on the second holder 222, the first holder 221 and the second holder 222 are both sleeved on the motor shaft 40, and the disc winding 12 is located between the first holder 221 and the second holder 222; wherein at least one of the first and second rotor assemblies further comprises a rotatable member 21. Therefore, the double-axial motor in the form of the 'stator and double rotors' is realized, the electromagnetic performance of the stator can be fully utilized, the output torque of the motor can be doubled under the condition of small increase of the axial size, and the whole axial size of the motor can be reduced under the condition that the rated output torque of the motor is not changed (a conventional radial motor with the same torque).

It should be noted that in order to make the electric machine more lightweight and thin in the axial direction, an axial electric machine in the form of a "stator-rotor" may be used, i.e. the electric machine comprises only one rotor, such as the first rotor assembly or the second rotor assembly.

As shown in fig. 4, fig. 4 is a schematic cross-sectional view of a section a-a in fig. 3, and it can be seen from fig. 4 that the motor structure provided by the embodiment of the present application can be reduced in size in the axial direction by providing magnetic flux variation using one bearing and disk winding.

In some embodiments, as shown in fig. 4, the height of the base 11 in the motor axial direction may also be set smaller than the height of the motor shaft 40 in the motor axial direction. The rotor assembly 20 of the motor 100 is exposed from the base 11, or the rotatable part 21 of the rotor assembly 20 is exposed from the base 11, or the rotatable part 21 and the holder 22 of the rotor assembly 20 are exposed from the base 11, thereby facilitating the connection of the rotatable part 21 with the part to be driven.

In some embodiments, it is preferable that one of the first and second rotor assemblies includes the rotatable member 21 and the other may not include the rotatable member 21, whereby the axial dimension of the motor can be further reduced.

In some embodiments, as shown in fig. 5a and 5b, the rotatable member 21 includes a rotating body 210 and a through hole 211 provided on the rotating body 210, and the rotatable member 21 is fitted on the motor shaft 40 through the through hole 211; the rotatable member 21 further includes an annular portion 212, an inner diameter of the annular portion 212 is the same as a diameter of the through hole 211, and the holder 22 may be provided on an outer side wall of the annular portion 212. Therefore, when the motor is assembled, the magnet 23 may be fixed to the holder 22, the holder 22 may be mounted on the rotatable member 21 to form the rotor assembly 20, and the rotor assembly 20 may be mounted on the motor shaft 40, so that the assembly efficiency of the motor may be improved, and the stability and reliability of the motor may be improved.

In some embodiments, as shown in fig. 6, the motor shaft 40 includes a fixing portion 41 and a connecting portion 42, the fixing portion 41 is configured to be inserted into an inner ring of the bearing 30, and the connecting portion 42 is configured to be connected to the rotatable member 21, wherein a dimension of the connecting portion 42 in the motor radial direction is larger than a dimension of the fixing portion 41 in the motor radial direction. Therefore, the motor is convenient to assemble, and meanwhile, the bearing is firmer relative to the motor shaft, so that the stability of the motor during working is improved.

In some embodiments, as shown in fig. 6, the connecting portion 42 further includes a step portion 420, the step portion 420 is a step extending from one end of the connecting portion 42 outwards in the radial direction of the motor, and correspondingly, as shown in fig. 5a, the through hole 211 on the rotating body 210 of the rotatable member 21 is further provided with a recessed portion 214, and when the rotatable member 21 is fixedly connected to the connecting portion 42 of the motor shaft 40, the step portion 420 fits into the recessed portion 214 for limiting the rotatable member 21, thereby facilitating the installation of the rotatable member 21, and thus improving the assembly efficiency of the motor.

In some embodiments, as shown in fig. 5a, the rotatable member 21 is provided with a first connector 213, and the first connector 213 is used for connecting a member to be driven, for example, the first connector 213 may be a screw hole or a screw, but may also be a fastener, etc.

In some embodiments, the motor provided by the present application may comprise two rotatable members 21, but in order to further reduce the size of the motor in the axial direction, one rotatable member 21 of the two rotatable members 21 is provided with a first connection 213, as shown in fig. 3 for example.

In some embodiments, as shown in fig. 7, the base 11 is further provided with a second connecting member 113, the second connecting member 113 is used to connect the motor to an external component, such as a body of the drone or a holding portion of the pan-tilt head, for example, the second connecting member 113 may be a screw hole or a screw, or may be a fastener.

In some embodiments, as shown in fig. 7, in order to improve the assembly efficiency of the motor and improve the stability of the motor after assembly, the base 11 may further include a first groove 111 and a second groove 112, the first groove 111 is used for placing the disc winding 12, and the second groove 112 is used for placing the bearing 30. For example, the disc winding 12 may be first fixedly mounted in the first groove 111, the bearing 30 may be fixedly mounted in the second groove 112, and the motor shaft 40 with the rotor assembly mounted thereon may be inserted into the inner ring of the bearing 30, thereby improving the assembly efficiency of the motor.

In some embodiments, as shown in fig. 2, the holder 22 includes a ring-shaped base 220 and a plurality of support arms 2201 extending from the ring-shaped base 220, and a placement slot 2202 is formed between each two support arms 2201 for placing a magnet.

In some embodiments, the disc winding 12 may include a PCB winding 121 or a core winding 122. The PCB winding can further compress the axial space of the motor, electromagnetic component optimization is carried out, the PCB winding is adopted to replace a conventional iron core winding, namely, the coil is embedded in the PCB to form the PCB winding to realize the stator winding of the motor, and the axial size of the stator winding is reduced.

As shown in fig. 8, fig. 8 is a schematic structural diagram of another motor provided in an embodiment of the present application, and the structure of the motor shown in fig. 8 is a top view.

As shown in fig. 9, fig. 9 is a schematic cross-sectional view of a section B-B in fig. 8, the disc winding 12 of the motor 100 shown in fig. 9 is the core winding 122, the core winding 122 includes a core 1221 and a winding 1222 wound on the core 1221, and when the core winding 122 is used, the motor 100 includes a Flexible Printed Circuit (FPC) 123, the Flexible Circuit 123 is disposed on the base 11, and the Flexible Circuit 123 is electrically connected to a coil of the core winding 122 so as to facilitate outgoing of the core winding. The PCB winding 121 combines the core winding 122 and the flexible circuit board 123 into one assembly, which solves the problem of wire outgoing of the motor, and saves the space required for mounting the flexible circuit board 123, thereby further reducing the axial size of the motor.

It should be noted that the structure of the motor 100 shown in fig. 9 is an axial motor in the form of a "stator-rotor". Of course, referring to fig. 2 and 4, a "stator-double rotor" form including core windings is designed, so that the torque can be increased, and the output force of the motor can be improved.

The embodiment of the application also provides a cloud platform, and this cloud platform includes cloud platform body and cloud platform motor, and the cloud platform motor sets up on the cloud platform body, and this cloud platform motor includes the arbitrary item that above-mentioned embodiment provided the motor. Through using miniaturized motor, this cloud platform also can further reduce the volume, and then has realized the miniaturization of cloud platform, has improved the competitiveness of product.

Illustratively, as shown in fig. 10, an embodiment of the present application provides a handheld tripod head 200, where the handheld tripod head 200 includes a holding portion 201 and a supporting arm 202, where the holding portion 201 and the supporting arm 202 are both provided with a tripod head motor, and the tripod head motor may use the motor provided in any one of the above embodiments, so as to implement stabilization of a shooting device of the handheld tripod head, so as to improve a shooting effect.

Please refer to fig. 11, fig. 11 is a schematic structural diagram of an unmanned aerial vehicle according to an embodiment of the present application. As shown in fig. 11, the drone 300 includes a main body 301, a motor 100, and a camera, and the camera may be mounted on the main body 301, or of course, the camera may be mounted on the main body 301 through a pan-tilt. The motor 100 is the motor described in any one of the above embodiments, and may be specifically installed on the fuselage 301 for driving the propeller of the unmanned aerial vehicle to rotate, so that the miniaturization of the unmanned aerial vehicle may be realized.

Wherein, this unmanned aerial vehicle includes rotor type unmanned aerial vehicle, for example four rotor type unmanned aerial vehicle, six rotor type unmanned aerial vehicle, eight rotor type unmanned aerial vehicle, also can be fixed wing type unmanned aerial vehicle, can also be the combination of rotor type and fixed wing type unmanned aerial vehicle, do not do the injecing here.

It should be further noted that the shooting device can be integrated with the holder body, and can also be detachably mounted on the holder body, that is, the shooting device is mounted on the holder body when the user uses the shooting device, and the shooting device is detached from the holder body when the shooting device is not used, so that the shooting device can be stored or carried.

While the invention has been described with reference to specific embodiments, the scope of the invention is not limited thereto, and those skilled in the art can easily conceive various equivalent modifications or substitutions within the technical scope of the invention. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. An electric machine, comprising:

a bearing;

2. The motor of claim 1, wherein the rotatable member includes a rotating body and a through hole provided on the rotating body, the rotatable member being fitted on the motor shaft through the through hole; the rotatable component further comprises an annular part, the inner diameter of the annular part is the same as the diameter of the through hole, and the retainer is arranged on the outer side wall of the annular part.

3. The electric machine of claim 2, wherein the motor shaft includes a fixing portion for being inserted into the inner race of the bearing and a connecting portion for connecting the rotatable member, wherein a dimension of the connecting portion in the motor radial direction is larger than a dimension of the fixing portion in the motor radial direction.

4. The motor of claim 3, wherein the connecting portion further comprises a step portion, the through hole of the rotating body further comprises a recessed portion, and the step portion fits into the recessed portion when the rotatable member is fixedly connected to the connecting portion of the motor shaft.

5. The electric machine of claim 1, wherein the rotor assembly includes a first rotor assembly and a second rotor assembly, the first rotor assembly including a first cage and a magnet secured to the first cage, the second rotor assembly including a second cage and a magnet secured to the second cage, the first and second cages each nested on the motor shaft, and the disc winding being located between the first and second cages;

wherein at least one of the first and second rotor assemblies further comprises a rotatable member.

6. An electric machine as claimed in claim 1, characterized in that the rotatable part is provided with a first connection for connecting the part to be driven.

7. An electric machine as claimed in claim 1, characterized in that the base is provided with a second connection for connecting the electric machine to an external component.

8. The electric machine of claim 1, wherein the base includes a first groove for receiving the disc winding and a second groove for receiving the bearing.

9. The motor of claim 1, wherein a height of the base in the motor axial direction is smaller than a height of the motor shaft in the motor axial direction.

10. The electric machine of any of claims 1-9, wherein the cage comprises a ring-shaped base and a plurality of support arms extending from the ring-shaped base, one magnet being positioned between each two of the support arms.

11. An electrical machine according to any of claims 1-9, wherein the bearings comprise four-point contact bearings.

12. An electric machine according to any of claims 1-9, characterized in that the disc windings comprise PCB windings or core windings.

13. The motor of claim 12, further comprising an FPC disposed on the base, the FPC being electrically connected to the coils of the core windings.

14. A pan/tilt head comprising a pan/tilt head body and a pan/tilt head motor, wherein the pan/tilt head motor is disposed on the pan/tilt head body, and the pan/tilt head motor comprises the motor according to any one of claims 1 to 13.

15. An unmanned aerial vehicle comprising a fuselage and a motor as claimed in any one of claims 1 to 13, the motor being provided on the fuselage.