WO2023023989A1

WO2023023989A1 - Electric motor, power mechanism and unmanned aerial vehicle

Info

Publication number: WO2023023989A1
Application number: PCT/CN2021/114596
Authority: WO
Inventors: 陈晓宇
Original assignee: 深圳市大疆创新科技有限公司
Priority date: 2021-08-25
Filing date: 2021-08-25
Publication date: 2023-03-02

Abstract

An electric motor (100), a power mechanism (200) and an unmanned aerial vehicle (300), the electric motor (100) comprising an electric motor seat (10), a rotating shaft (20) and a bearing assembly (50), wherein the electric motor seat (10) is provided with a mounting hole (11); the rotating shaft (20) is rotatably arranged in the mounting hole (11) in a penetrating manner; the bearing assembly (50) comprises a bearing sleeve (51) and a porous bearing (52), the bearing sleeve (51) being mounted in the mounting hole (11), and the porous bearing (52) at least partially being mounted inside the bearing sleeve (51); and the rotating shaft (20) is arranged in the porous bearing (52) in a penetrating manner. The bearing sleeve (51) is a non-metal bearing sleeve, one of the bearing sleeve (51) and the electric motor seat (10) is provided with a protrusion (511), the other of the bearing sleeve (51) and the electric motor seat (10) is provided with a groove (111), and the protrusion (511) is embedded in the groove (111), so as to limit the relative rotation of the bearing sleeve (52) with respect to the electric motor seat (10); alternatively, the electric motor seat (10) is a metal electric motor seat, and the bearing sleeve (51) is a metal bearing sleeve.

Description

Motors, Power Mechanisms and UAVs

technical field

This application relates to the technical field of motors, in particular to motors, power mechanisms and unmanned aerial vehicles.

Background technique

In order to reduce the weight and cost of the motor, some motors use oil-impregnated bearings with bearing sleeves. The existing bearing sleeves are mostly made of plastic materials, and epoxy glue with good reliability cannot be used between the bearing sleeves and the motor base. , anaerobic adhesive and instant adhesive, etc., can only be bonded and fixed with glue with low reliability. However, the high-speed rotation of the motor will exert a tangential force on the bearing sleeve. Over time, the glue between the bearing sleeve and the motor base will age and fail, and the motor shaft will drive the bearing sleeve to rotate until the bearing sleeve is thrown out of the motor base, eventually causing the The rotor flew out.

Contents of the invention

In view of this, the application proposes a motor, a power mechanism and an unmanned aerial vehicle.

The motor proposed in the first aspect of this application includes:

A motor base, the motor base is provided with a mounting hole;

a rotating shaft, the rotating shaft is rotatably installed in the installation hole;

The bearing assembly includes a bearing sleeve and an oil bearing, the bearing sleeve is installed in the installation hole, the oil bearing is at least partly installed in the bearing sleeve, and the rotating shaft passes through the oil bearing;

Wherein, the bearing sleeve is a non-metallic bearing sleeve, one of the bearing sleeve and the motor base is provided with a protrusion, and the other of the bearing sleeve and the motor base is provided with a groove, so The protrusion is embedded in the groove to limit the relative rotation of the bearing sleeve relative to the motor seat; or, the motor seat is a metal motor seat, and the bearing sleeve is a metal bearing sleeve.

The power mechanism proposed in the second aspect of the present application includes a motor and a propeller, the propeller is installed on the motor and driven to rotate by the motor, wherein the motor includes:

A motor base, the motor base is provided with a mounting hole;

The drone proposed in the third aspect of this application includes:

body;

an arm mechanically coupled to the fuselage;

a power mechanism, installed on the arm, for providing flight power for the flight of the unmanned aerial vehicle;

The power mechanism includes a motor and a propeller, the propeller is mounted on the motor and driven to rotate by the motor, wherein the motor includes:

A motor base, the motor base is provided with a mounting hole;

It can be seen from the above technical solution that the motor proposed in the first aspect of the present application realizes positioning through the cooperation between the bearing sleeve and the motor seat through the cooperation of the protrusion and the groove, and there will be no relative friction between the bearing sleeve and the motor seat. Rotation can avoid the situation that the motor drives the bearing sleeve to rotate and cause the bearing sleeve to be thrown out of the motor seat. Or by setting the motor seat as a metal motor seat, and the bearing sleeve as a metal bearing sleeve, a more firm and reliable connection method can be adopted between the motor base and the bearing sleeve, and it is also possible to prevent the bearing sleeve from being thrown out of the motor base. Condition. The above two improvement methods overcome the technical problem that the bearing sleeve of the motor will be thrown out from time to time, and effectively prolong the service life of the motor.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present application more clearly, the drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present application. Ordinary technicians can also obtain other drawings based on these drawings on the premise of not paying creative work.

Fig. 1 is a schematic sectional view of a motor proposed by an embodiment of the present application;

Fig. 2 is a structural schematic view of the bottom view of the motor proposed by an embodiment of the present application;

Fig. 3 is a schematic diagram of cooperation between a motor seat and a bearing sleeve proposed in an embodiment of the present application;

Fig. 4 is a schematic structural view of a motor seat proposed by an embodiment of the present application;

Fig. 5 is a schematic structural diagram of a bearing sleeve proposed by an embodiment of the present application;

Fig. 6 is a schematic diagram of the cooperation between the motor base and the bearing sleeve proposed in another embodiment of the present application;

Fig. 7 is a schematic structural view of a motor seat proposed in another embodiment of the present application;

Fig. 8 is a schematic structural diagram of a bearing sleeve proposed in another embodiment of the present application;

Fig. 9 is a schematic cross-sectional view of a motor proposed in another embodiment of the present application;

Fig. 10 is a schematic structural diagram of a stopper proposed by an embodiment of the present application;

Fig. 11 is a schematic diagram of the cooperation between the body and the stopper proposed by an embodiment of the present application;

Fig. 12 is a schematic diagram of the cooperation between the body and the stopper proposed in another embodiment of the present application;

Fig. 13 is a schematic structural diagram of an ontology proposed in another embodiment of the present application;

Fig. 14 is a schematic structural diagram of a stopper proposed in another embodiment of the present application;

Fig. 15 is a schematic diagram of the cooperation between the body and the stopper proposed in another embodiment of the present application;

Fig. 16 is a schematic diagram of cooperation between the body and the stopper proposed in another embodiment of the present application;

Fig. 17 is a schematic diagram of cooperation between the body and the stopper proposed in another embodiment of the present application;

Fig. 18 is a schematic diagram of cooperation between the body and the stopper proposed in another embodiment of the present application;

Fig. 19 is a schematic diagram of cooperation between the body and the stopper proposed in another embodiment of the present application;

Fig. 20 is a schematic cross-sectional view of a motor proposed in another embodiment of the present application;

Fig. 21 is an explosion schematic diagram of the structure shown in Fig. 20;

Fig. 22 is a schematic diagram of the coordination of the motor base, bearing sleeve, oil bearing and ball bearing proposed by an embodiment of the present application;

Fig. 23 is a partially enlarged schematic diagram of A in Fig. 22;

Fig. 24 is a schematic diagram of the cooperation of the motor seat, the oil bearing and the bearing seat proposed in another embodiment of the present application;

Fig. 25 is a schematic structural view of the bearing housing shown in Fig. 24;

Fig. 26 is a schematic structural view of a power mechanism proposed in an embodiment of the present application;

Fig. 27 is a schematic structural diagram of a drone proposed in an embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Orientation indicated by rear, left, right, vertical, horizontal, top, bottom, inside, outside, clockwise, counterclockwise, etc. The positional relationship is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the application and simplifying the description, and does not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, Therefore, it should not be construed as limiting the application. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of said features. In the description of the present application, "plurality" means two or more, unless otherwise specifically defined.

Some implementations of the present application will be described in detail below in conjunction with the accompanying drawings. In the case of no conflict, the following embodiments and features in the embodiments can be combined with each other.

As shown in Fig. 1 and Fig. 2, the embodiment of the present application proposes a kind of motor 100, and proposed motor 100 comprises motor base 10, rotating shaft 20, stator 30, rotor 40 and bearing assembly 50, and motor base 10 is provided with mounting hole 11 , the rotating shaft 20 is rotatably passed through the mounting hole 11 , the stator 30 is mounted on the motor base 10 , and the rotor 40 is mounted on the rotating shaft 20 . The bearing assembly 50 includes a bearing sleeve 51 and an oil-impregnated bearing 52 , the bearing sleeve 51 is installed in the installation hole 11 , the oil-impregnated bearing 52 is installed in the bearing sleeve 51 , and the rotating shaft 20 passes through the oil-impregnated bearing 52 .

When the motor 100 is working, the stator 30 is connected with alternating current to generate a rotating magnetic field, and the rotor 40 generates torque under the action of electromagnetic force, and rotates with the rotating magnetic field, and the rotating rotor 40 drives the rotating shaft 20 to rotate relative to the motor base 10 .

Exemplarily, the stator 30 includes an iron core 31 and a plurality of windings 32, the iron core 31 includes an annular yoke 311 and a plurality of stator teeth 312, the annular yoke 311 is sleeved on the outer wall of the motor base 10, and the plurality of stator teeth 312 surround the ring The yokes 311 are arranged at intervals, and a winding 32 is wound on each stator tooth 312 . The rotor 40 also includes an end cover 41, a surrounding wall 42 and a plurality of permanent magnets 43. The end cover 41 is connected to the rotating shaft 20, the surrounding wall 42 surrounds the end cover 41, and a plurality of permanent magnets 43 are arranged at intervals around the surrounding wall 42. The magnet 43 is opposite to the stator tooth 312. The relative of the permanent magnet 43 to the stator tooth 312 does not mean that the position of the permanent magnet 43 and the stator tooth 312 is fixed. The projection on the surrounding wall 42 at least partially overlaps the permanent magnet 43 . It should be noted that, in this embodiment, the permanent magnet 43 and the stator tooth 312 are opposite in the radial direction, and the permanent magnet 43 works through the interaction of the radial magnetic field generated by the stator tooth 312 and the winding 32, that is, the proposed motor 100 for radial motors. Of course, in some other embodiments, the proposed motor 100 can also be an axial motor, that is, the permanent magnet 43 and the stator tooth 312 are arranged to be axially opposite, and the permanent magnet 43 passes through the axial direction generated by the stator tooth 312 and the winding 32. The interaction of magnetic fields works.

Optionally, the stator 30 is located inside the surrounding wall 42 , and when the motor 100 is running, the end cover 41 and the surrounding wall 42 rotate relative to the stator 30 , that is, the proposed motor 100 is an external rotor motor. Of course, in some other embodiments, the proposed motor 100 can also be configured as an external rotor motor, which depends on design requirements.

As shown in Figures 3 to 8, in some embodiments, the bearing sleeve 51 is a non-metallic bearing sleeve, the outer wall of the bearing sleeve 51 is provided with a protrusion 511, the inner wall of the mounting hole 11 is provided with a groove 111, and the protrusion 511 is embedded in the groove 111 to limit the relative rotation of the bearing sleeve 51 relative to the motor base 10 . By setting the bearing sleeve 51 and the motor base 10 through the cooperation of the protrusion 511 and the groove 111 to achieve positioning, no relative rotation will occur between the bearing sleeve 51 and the motor base 10, which can reduce the rotation of the bearing sleeve 51 driven by the rotating shaft 20 The situation that the bearing sleeve 51 is thrown out of the motor base 10 is caused.

Optionally, the bearing sleeve 51 is a plastic bearing sleeve. Optional plastic bearing sleeves 51 include polyoxymethylene (POM) plastic bearing sleeves, nylon (Polyamide, PA) plastic bearing sleeves, polytetrafluoroethylene (Poly tetrafluoroethylene, PTFE) plastic bearing sleeves, and the like.

As shown in Figures 3 to 5, for example, the number of protrusions 511 and grooves 111 is one, the grooves 111 are provided on the inner sidewall of the mounting hole 11 and extend to the bottom of the motor base 10, and the protrusions 511 are provided on the outer wall of the bearing sleeve 51. During installation, place the bearing sleeve 51 on the bottom of the motor base 10 , align the protrusion 511 with the groove 111 , and then push the bearing sleeve 51 into the mounting hole 11 of the motor base 10 .

As shown in FIGS. 6 to 8 , of course, the number of protrusions 511 and grooves 111 is not limited to one, and may also be two or more. A plurality of protrusions 511 surround the outer wall of the bearing sleeve 51 Arranged at intervals, a plurality of grooves 111 are arranged at intervals around the inner sidewall of the installation hole 11 . Through the cooperation of multiple protrusions 511 and multiple grooves 111, the connection between the bearing sleeve 51 and the motor base 10 can be made more stable and relative rotation can be avoided.

It can be understood that the positions of the protrusion 511 and the groove 111 can be interchanged, that is, the protrusion 511 is arranged on the inner side wall of the mounting hole 11, and the groove 111 is arranged on the outer side wall of the bearing sleeve 51. It depends on actual design needs.

It should be noted that the groove 111 and the protrusion 511 are not limited to the above-mentioned method of being arranged on the inner side wall of the mounting hole 11 and the outer side wall of the bearing sleeve 51, for example, in some other embodiments, as shown in Fig. 9 and Fig. 10 As shown, the motor base 10 includes a body 12 and a stopper 13, the body 12 is provided with the installation hole 11, the stopper 13 is installed on the body 12, the stopper 13 is used to prevent the bearing sleeve 51 from falling out of the installation hole 11, wherein the stopper The member 13 is provided with at least one protrusion 511, and the bearing sleeve 51 is provided with at least one groove 111. When the stopper 13 is installed on the body 12, the protrusion 511 is embedded in the groove 111, so that the bearing sleeve 51 and the stopper Relative rotation cannot occur between the components 13, that is, relative rotation cannot occur between the bearing sleeve 51 and the mounting seat. In this embodiment, the cooperation between the protrusion 511 and the groove 111 may or may not be provided between the outer side wall of the bearing sleeve 51 and the inner side wall of the installation hole 11 .

It should be noted that the positions of the protrusion 511 and the groove 111 can be interchanged, that is, the protrusion 511 is disposed on the bearing sleeve 51 and the groove 111 is disposed on the blocking member 13 is also possible.

Exemplarily, a step 112 is provided on the inner wall of the installation hole 11 , one end of the bearing sleeve 51 abuts against the step 112 , and the stopper 13 abuts against the other end of the bearing sleeve 51 , thereby preventing the bearing sleeve 51 from falling out of the installation hole 11 .

As shown in FIG. 11 , specifically, in some embodiments, a sinking groove 121 is provided at the bottom of the body 12 and at the installation hole 11 , the stopper 13 is embedded in the sinking groove 121 , and the inner wall of the sinking groove 121 is provided with an inner wall. The outer wall of the stopper 13 is provided with external threads, and the stopper 13 is mounted on the body 12 through threaded connection.

As shown in Figure 12, of course, the bottom of the body 12 may not be provided with a sinking groove 121, the inner side wall of the mounting hole 11 is provided with internal threads, and the outer side wall of the stopper 13 is provided with external threads, and the stopper 13 is installed by threaded connection. in the mounting hole 11.

It should be noted that the threaded connection between the stopper 13 and the body 12 is not limited. For example, in some other embodiments, as shown in FIG. 13 and FIG. There is a sinking groove 121, and the stopper 13 is embedded in the sinking groove 121. The inner side wall of the sinking groove 121 is provided with a first buckle part 61, and the outer sidewall of the stopper 13 is provided with a second buckle part 62. The stopper 13 passes through the buckle The buckle connection is installed on the body 12 .

Exemplarily, the first buckle portion 61 includes a first groove portion 611 and a second groove portion 612. The first groove portion 611 extends axially from the bottom of the body 12 along the body 12. One end of the second groove portion 612 is connected to the first groove portion 612. The groove portion 611 communicates, and the other end extends circumferentially along the inner side wall of the sinker 121 . The second locking portion 62 is a protrusion disposed on a sidewall of the blocking member 13 . When the stopper 13 is installed on the body 12, align the protrusion with the first groove 611, press the stopper 13 into the sinker groove 121, and then turn the stopper 13 so that the protrusion is set in the second groove 612, and the completion The snap connection between the stopper 13 and the body 12 .

Of course, the bottom of the body 12 may not be provided with the sinking groove 121, the inner side wall of the mounting hole 11 is provided with the first buckle portion 61, the outer side wall of the stopper 13 is provided with the second buckle portion 62, and the stopper 13 passes through the buckle. Buckle connection is installed in the installation hole 11. For the first buckle portion 61 and the second buckle portion 62 , reference may be made to the above-mentioned structure, which will not be repeated here.

It should be noted that the connection between the stopper 13 and the body 12 is not limited to the threaded connection and snap connection. For example, in some other embodiments, as shown in FIG. 15 , the bottom of the body 12 is located at the installation hole 11 A sinking groove 121 is provided, and the blocking member 13 is embedded in the sinking groove 121 , and the blocking member 13 and the groove bottom wall and/or the groove side wall of the sinking groove 121 are bonded and fixed by glue 70 .

As shown in Figure 16, of course, the bottom of the body 12 may not be provided with a sinking groove 121, and the stopper 13 is directly embedded in the installation hole 11, and the inner side wall of the installation hole 11 and the outer sidewall of the stopper 13 are bonded and fixed by glue 70 .

As shown in FIG. 17 , in addition, the bottom of the body 12 may not be provided with a sinking groove 121 , and the stopper 13 is directly bonded and fixed on the bottom of the body 12 by glue 70 .

It should be noted that the connection between the stopper 13 and the body 12 is not limited to threaded connection, snap-fit connection and bonding. For example, in some other embodiments, as shown in FIG. 18 , the bottom of the body 12 is located A sinking groove 121 is provided at the hole 11 , and the blocking member 13 is embedded in the sinking groove 121 , and the blocking member 13 is fastened to the bottom surface of the sinking groove 121 by screws 80 .

As shown in FIG. 19 , of course, the bottom of the body 12 may not be provided with a sunken groove 121 , and the stopper 13 is attached to the bottom of the body 12 and fastened by screws 80 .

As shown in FIGS. 1 and 8 , optionally, the oil-impregnated bearing 52 is a spherical oil-impregnated bearing 52 . The spherical oil-impregnated bearing 52 can automatically adjust the concentricity with other bearings during the rotation of the rotating shaft 20 to realize automatic centering, so that the motor 100 operates stably.

Optionally, the bearing sleeve 51 is provided with a spherical inner cavity 512 to fit with the spherical oil-impregnated bearing 52 .

In some embodiments, one end of the bearing sleeve 51 is provided with a plurality of slots 513 extending in the axial direction, and the plurality of slots 513 are distributed along the circumferential direction of the bearing sleeve 51 to divide one end of the bearing sleeve 51 into a plurality of petals. The sheet 514 and the oil-impregnated bearing 52 are located in the space enclosed by the plurality of flaps 514 . With this design, when the spherical oil-impregnated bearing 52 is installed into the bearing sleeve 51 , the petals 514 can be deformed to enlarge the opening, so that the oil-impregnated bearing 52 can be installed into the bearing sleeve 51 relatively easily. Certainly, in some other embodiments, it is also possible that the bearing sleeve 51 does not have a plurality of slots 513 .

In some embodiments, the outer sidewall of the bearing sleeve 51 is bonded to the inner sidewall of the installation hole 11 . In this way, the connection between the bearing sleeve 51 and the motor base 10 can be made tighter, further preventing relative rotation between the bearing sleeve 51 and the motor base 10 . Of course, it is also possible that the outer side wall of the bearing sleeve 51 is not bonded to the inner side wall support of the mounting hole 11 .

Optionally, the outer sidewall of the bearing sleeve 51 is provided with a glue groove 515 for accommodating glue for bonding the bearing sleeve 51 to the inner sidewall of the installation hole 11 . More glue can be accommodated by setting the glue groove 515 , so that the bearing sleeve 51 and the inner wall of the mounting hole 11 are firmly bonded. It should be noted that the glue groove 515 is not limited to be arranged on the outer sidewall of the bearing sleeve 51, and may also be arranged on the inner sidewall of the mounting hole 11. Of course, it is also possible that neither the outer wall of the bearing sleeve 51 nor the inner wall of the mounting hole 11 is provided with the glue groove 515 .

Exemplarily, there are multiple glue grooves 515 , and the multiple glue grooves 515 are arranged at intervals around the outer wall of the bearing sleeve 51 . Of course, the number of glue grooves 515 may also be one, which is determined according to actual design requirements.

In some embodiments, the inner sidewall of the bearing sleeve 51 and the outer sidewall of the oil-impregnated bearing 52 are fixed by glue bonding. This design method can keep the oil-impregnated bearing 52 and the bearing sleeve 51 relatively fixed, and reduce wear caused by mutual rotation. Of course, it is also possible that the inner sidewall of the bearing sleeve 51 and the outer sidewall of the oil-impregnated bearing 52 are not set to be fixed by glue.

It should be noted that the relationship between the motor base 10 and the bearing sleeve 51 is not limited to the above-mentioned cooperation between the protrusion 511 and the groove 111 to avoid relative rotation between the bearing sleeve 51 and the motor base 10, for example, in some other In the embodiment, as shown in FIG. 20 , the motor seat 10 is a metal motor seat, and the bearing sleeve 51 is a metal bearing sleeve. Compared with the existing plastic bearing sleeve, by setting the motor base 10 as a metal motor base and the bearing sleeve 51 as a metal bearing sleeve, a more firm and reliable connection method can be adopted between the motor base 10 and the bearing sleeve 51, so that the bearing sleeve 51 The connection with the motor base 10 is firm, and the situation that the bearing sleeve 51 is thrown out from the motor base 10 can also be well reduced.

Optionally, the motor base 10 and the bearing sleeve 51 can be made of copper, copper alloy, aluminum, aluminum alloy, stainless steel and other materials.

As shown in Figure 21, for example, the inner wall of the mounting hole 11 is provided with a boss 113, the boss 113 includes a first side 113a and a second side 113b opposite to the first side 113a, the bearing sleeve 51 is arranged on the boss 113, the first side 113a of the boss 113 is provided with a first arc-shaped groove 1131, the side of the bearing sleeve 51 facing the boss 113 is provided with a second arc-shaped groove 516, the first arc-shaped groove 1131 and The second arc-shaped groove 516 encloses and forms a receiving cavity for receiving the spherical oil-impregnated bearing 52 , and the spherical oil-impregnated bearing 52 is partially accommodated in the first arc-shaped groove 1131 and partially accommodated in the second arc-shaped groove 516 .

The bearing sleeve 51 and the inner sidewall of the mounting hole 11 can be connected by thread connection or buckle connection or screw 80 fastening or bonding. The specific implementation manners of screw connection or snap connection or screw 80 fastening or bonding can refer to the above-mentioned embodiments, and details are not repeated here.

As shown in FIG. 21 and FIG. 23 , in some embodiments, the boss 113 is loosely fitted with the oil bearing 52 . Due to possible errors in the manufacturing or assembly process of the components, the central axis of the rotating shaft 20 and the mounting hole 11 may not be coaxial, and there is an offset, so that the position of the oil bearing 52 is also offset. In this embodiment, by placing the boss The clearance fit between 113 and the oil bearing 52 provides an adjustable space for the oil bearing 52, avoiding a large stress between the rotating shaft 20 and the oil bearing 52 after installation, which affects the stable operation of the motor 100.

In some embodiments, the bearing sleeve 51 and the oil-impregnated bearing 52 are loosely fitted. Similarly, by setting the bearing sleeve 51 and the oil-impregnated bearing 52 as a clearance fit, the oil-impregnated bearing 52 is given an adjustable space, so as to avoid the large stress between the bearing sleeve 51 and the oil-impregnated bearing 52 after installation, which will affect the performance of the motor 100. Stable operation.

In some embodiments, the motor base 10 includes a first end 10a and a second end 10b opposite to the first end 10a, the bearing sleeve 51 is disposed on the first end 10a of the motor base 10, and the first side 113a of the boss 113 reaches The distance between the end surfaces of the first end 10a of the motor base 10 is S, and the thickness of the bearing sleeve 51 in the axial direction of the rotating shaft 20 is L, wherein S>L. With this design method, by leaving a gap between the bearing sleeve 51 and the boss 113, when the bearing sleeve 51 is installed, the size of the gap between the bearing sleeve 51 and the boss 113 can be adjusted to adjust the size of the bearing sleeve 51. The tightness between the oil bearing 52 and the oil bearing 52 makes the oil bearing 52 run under a reasonable tightness.

In some embodiments, the bearing sleeve 51 is an annular solid structure.

As shown in Figures 1 and 22, in some embodiments, the bearing assembly 50 further includes a ball bearing 53, the ball bearing 53 is installed in the mounting hole 11 and is located on the second side 113b of the boss 113, and the rotating shaft 20 passes through the ball Bearing 53. The oil bearing 52 and the ball bearing 53 jointly support the smooth rotation of the rotating shaft 20 . The spherical oil-impregnated bearing 52 can automatically adjust the concentricity with the ball bearing 53 during the rotation of the rotating shaft 20 to realize automatic centering, so that the motor 100 operates stably.

It should be noted that the bearing sleeve 51 is not limited to be configured as a ring-shaped solid structure. For example, in some other embodiments, as shown in FIG. 24 and FIG. part 93, the ring part 91 abuts against the inner side wall of the mounting hole 11, the arc part 92 is located inside the ring part 91, the arc part 92 surrounds and forms the second arc groove 516, and the connecting part 93 is connected to the ring part 91 and the arc Between the shaped parts 92. The annular portion 91 , the arc portion 92 and the connecting portion 93 are all sheet structures. In this embodiment, the use of materials is reduced and the quality of the bearing sleeve 51 can be reduced. In this embodiment, the ring portion 91 and the inner sidewall of the installation hole 11 may be connected by screw connection, snap connection, adhesive bonding, screw 80 fastening connection or interference fit. For the specific implementation manners of threaded connection, snap connection, adhesive connection, or screw 80 fastening connection, reference may be made to the above-mentioned embodiments, and details are not repeated here.

Optionally, the connecting portion 93 is connected to the same side of the ring portion 91 and the arc portion 92 . Of course, the connection portion 93 can also be connected at any position between the two sides of the ring portion 91 and between the two sides of the arc portion 92, for example, one end of the connection portion 93 is connected to the middle part of the ring portion 91, and the other end of the connection portion 93 It is connected to the middle of the arc portion 92 .

Optionally, the bearing sleeve 51 is integrally formed by stamping. For example, the bearing sleeve 51 is integrally formed by stamping a copper plate or an aluminum alloy plate. Simple to manufacture. Certainly, the bearing sleeve 51 is also possible to be formed by casting or machining.

As shown in FIG. 1 and FIG. 26 , the embodiment of the present application also proposes a power mechanism 200 . The proposed power mechanism 200 includes a propeller 201 and the above-mentioned motor 100 . The propeller 201 is installed on the motor 100 and driven to rotate by the motor 100 .

Exemplarily, the propeller 201 is connected to the rotating shaft 20 on the motor 100 , and when the rotor 40 drives the rotating shaft 20 to rotate, it synchronously drives the propeller 201 to rotate.

As shown in Figure 27, the embodiment of the present application also proposes a drone 300, the proposed drone 300 includes a fuselage 301, a machine arm 302 and the above-mentioned power mechanism 200, and the machine arm 302 is mechanically coupled to the fuselage 301 , the power mechanism 200 is installed on the arm 302 to provide flight power for the flight of the UAV 300 .

It should be noted that the motor 100 proposed in this application is not limited to use in the field of drones, but can also be used in fields such as mobile robots, smart cars, smart ships, fans, washing machines, and wipers.

In the description of this application, it should be noted that unless otherwise specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. connected, or integrally connected. It can be a mechanical connection or an electrical connection. It can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two elements or the interaction relationship between two elements. Those of ordinary skill in the art can understand the specific meanings of the above terms in this application according to specific situations.

In this application, unless otherwise expressly specified and limited, a first feature being "on" or "under" a second feature may include direct contact between the first and second features, and may also include the first and second features Not in direct contact but through another characteristic contact between them. Moreover, "above", "above" and "above" the first feature on the second feature include that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature. "Below", "beneath" and "under" the first feature to the second feature include that the first feature is directly below and obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

The above disclosure provides many different implementations or examples for implementing different structures of the present application. To simplify the disclosure of the present application, the components and arrangements of specific examples are described above. Of course, they are examples only and are not intended to limit the application. Furthermore, the present application may repeat reference numerals and/or reference letters in various instances, such repetition is for simplicity and clarity and does not in itself indicate a relationship between the various embodiments and/or arrangements discussed. In addition, various specific process and material examples are provided herein, but one of ordinary skill in the art may recognize the use of other processes and/or the use of other materials.

In the description of this specification, descriptions referring to the terms "one embodiment", "some embodiments", "exemplary embodiments", "examples", "specific examples", or "some examples" etc. mean that the embodiments are combined Specific features, structures, materials, or characteristics described in or examples are included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the described specific features, structures, materials or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present application. The scope of the application is defined by the claims and their equivalents.

Claims

A motor, characterized in that it comprises:

A motor base, the motor base is provided with a mounting hole;

a rotating shaft, the rotating shaft is rotatably installed in the installation hole;

The bearing assembly includes a bearing sleeve and an oil bearing, the bearing sleeve is installed in the installation hole, the oil bearing is at least partly installed in the bearing sleeve, and the rotating shaft passes through the oil bearing;

Wherein, the bearing sleeve is a non-metallic bearing sleeve, one of the bearing sleeve and the motor base is provided with a protrusion, and the other of the bearing sleeve and the motor base is provided with a groove, so The protrusion is embedded in the groove to limit the relative rotation of the bearing sleeve relative to the motor seat; or, the motor seat is a metal motor seat, and the bearing sleeve is a metal bearing sleeve.
The motor according to claim 1, wherein at least one of the protrusions is provided on one of the outer side wall of the bearing sleeve and the inner side wall of the mounting hole, and the outer side wall of the bearing sleeve and the inner side wall of the mounting hole are provided with at least one protrusion. The other one of the inner sidewalls of the mounting holes is provided with at least one groove.
The motor according to claim 1, wherein the motor base comprises:

The body is provided with the installation hole;

a stopper, installed on the body, and the stopper is used to prevent the bearing sleeve from falling out of the installation hole;

Wherein, one of the stopper and the bearing sleeve is provided with at least one protrusion, and the other of the stopper and the bearing sleeve is provided with at least one groove.
A motor as claimed in claim 3, characterized in that,

The stopper is threadedly connected to the inner side wall of the installation hole; or,

The stopper is snap-connected with the body; or,

The stopper is adhesively fixed to the body; or,

The stopper is fastened to the body with screws.
The motor according to claim 1, wherein the bearing sleeve is a plastic bearing sleeve.
The motor according to claim 5, wherein the oil-impregnated bearing is a spherical oil-impregnated bearing.
The motor according to claim 6, characterized in that, the bearing sleeve is provided with a spherical inner cavity to fit the spherical oil-impregnated bearing.
The motor according to claim 6, wherein one end of the bearing sleeve is provided with a plurality of slots extending in the axial direction, and the plurality of slots are distributed along the circumferential direction of the bearing sleeve at intervals to separate the One end of the bearing sleeve is divided into a plurality of petals, and the oil-impregnated bearing is located in a space enclosed by the plurality of petals.
The motor according to claim 1, characterized in that, the outer wall of the bearing sleeve is bonded and fixed to the inner wall of the mounting hole.
The motor according to claim 9, characterized in that, the outer wall of the bearing sleeve or the inner wall of the installation hole is provided with a glue groove for accommodating the bonding of the bearing sleeve and the inner wall of the installation hole. glue.
The motor according to claim 1, characterized in that, the inner wall of the bearing sleeve and the outer wall of the oil-impregnated bearing are bonded and fixed by glue.
The motor according to claim 1, wherein the motor seat is a metal motor seat, and the bearing sleeve is a metal bearing sleeve, wherein,

The bearing sleeve is threadedly connected to the inner side wall of the mounting hole; or,

The bearing sleeve is snap-connected with the motor base; or,

The bearing sleeve is tightly connected with the motor seat by screws; or,

The bearing sleeve is bonded and fixed to the motor base.
The motor according to claim 12, wherein the oil-impregnated bearing is a spherical oil-impregnated bearing, and the inner wall of the mounting hole is provided with a boss, and the boss includes a first side and is opposite to the first side. The second side of the boss, the bearing sleeve is set on the first side of the boss, the first side of the boss is provided with a first arc-shaped groove, and the side of the bearing sleeve facing the boss is provided with The second arc-shaped groove, the first arc-shaped groove and the second arc-shaped groove enclose to form a housing cavity for housing the spherical oil-impregnated bearing.
The motor according to claim 13, characterized in that there is a clearance fit between the boss and the oil-impregnated bearing.
The motor according to claim 13, characterized in that the bearing sleeve and the oil-impregnated bearing are in clearance fit.
The motor according to claim 13, wherein the motor seat includes a first end and a second end opposite to the first end, and the bearing is sleeved on the first end of the motor seat, so that The distance from the first side of the boss to the end surface of the first end of the motor seat is S, and the thickness of the bearing sleeve in the axial direction of the rotating shaft is L, wherein S>L.
The motor according to claim 13, characterized in that the bearing sleeve is an annular solid structure.
The electric machine of claim 13, wherein said bearing housing comprises:

an annular portion abutting against the inner sidewall of the mounting hole;

an arc portion located inside the annular portion, the arc portion encloses and forms the second arc groove;

The connection part is connected between the ring part and the arc part.
An electric machine as claimed in claim 18, characterized in that,

The annular portion is threadedly connected to the inner sidewall of the mounting hole; or

The ring part is snap-connected with the motor seat; or,

The annular part is bonded and fixed to the motor base; or,

The ring portion is fastened to the motor base by screws; or,

The annular portion is in interference fit with the installation hole.
The motor according to claim 18, characterized in that the bearing sleeve is integrally formed by stamping.
The electric machine of claim 13, wherein said bearing assembly further comprises:

The ball bearing is installed in the installation hole and located on the second side of the boss, and the rotating shaft passes through the ball bearing.
The motor according to claim 1, further comprising a stator and a rotor, the stator is installed on the bearing seat, and the rotor is installed on the shaft; the stator includes an iron core and a plurality of windings, the The iron core includes an annular yoke and a plurality of stator teeth, the annular yoke is sleeved on the outer wall of the motor base, the plurality of stator teeth are arranged at intervals around the annular yoke, and each stator tooth is wound with a The winding; the rotor includes an end cover, a surrounding wall and a plurality of permanent magnets, the end cover is connected to the rotating shaft, the surrounding wall surrounds the end cover, and the plurality of permanent magnets surround the The surrounding walls are arranged at intervals, and the permanent magnets are opposite to the stator teeth.
A power mechanism is characterized in that it includes a motor and a propeller, the propeller is mounted on the motor and driven to rotate by the motor, wherein the motor includes:

A motor base, the motor base is provided with a mounting hole;

a rotating shaft, the rotating shaft is rotatably installed in the installation hole;

The bearing assembly includes a bearing sleeve and an oil bearing, the bearing sleeve is installed in the installation hole, the oil bearing is at least partly installed in the bearing sleeve, and the rotating shaft passes through the oil bearing;

Wherein, the bearing sleeve is a non-metallic bearing sleeve, one of the bearing sleeve and the motor base is provided with a protrusion, and the other of the bearing sleeve and the motor base is provided with a groove, so The protrusion is embedded in the groove to limit the relative rotation of the bearing sleeve relative to the motor seat; or, the motor seat is a metal motor seat, and the bearing sleeve is a metal bearing sleeve.
The power mechanism according to claim 23, wherein at least one of the protrusions is provided on one of the outer sidewall of the bearing sleeve and the inner sidewall of the mounting hole, and the outer sidewall of the bearing sleeve and the inner sidewall of the mounting hole The other of the inner sidewalls of the mounting hole is provided with at least one of the grooves.
The power mechanism according to claim 23, wherein the motor base comprises:

The body is provided with the installation hole;

A stopper is installed on the motor seat, and the stopper is used to stop the bearing sleeve from falling out of the mounting hole;

Wherein, one of the stopper and the bearing sleeve is provided with at least one protrusion, and the other of the stopper and the bearing sleeve is provided with at least one groove.
The power mechanism of claim 25, wherein:

The stopper is threadedly connected to the inner side wall of the installation hole; or,

The stopper is snap-connected to the motor seat; or,

The stopper is bonded and fixed to the motor base; or,

The stopper is fastened to the motor base with screws.
The power mechanism according to claim 23, wherein the bearing sleeve is a plastic bearing sleeve.
The power mechanism according to claim 27, wherein the oil-impregnated bearing is a spherical oil-impregnated bearing.
The power mechanism according to claim 28, characterized in that, said bearing sleeve is provided with a spherical inner cavity to fit with said spherical oil-impregnated bearing.
The power mechanism according to claim 28, wherein one end of the bearing sleeve is provided with a plurality of axially extending slots, and the plurality of slots are distributed along the circumferential direction of the bearing sleeve at intervals to One end of the bearing sleeve is divided into a plurality of petals, and the oil bearing is located in a space enclosed by the plurality of petals.
The power mechanism according to claim 23, characterized in that, the outer wall of the bearing sleeve is bonded and fixed to the inner wall of the installation hole.
The power mechanism according to claim 31, wherein the outer wall of the bearing sleeve is provided with a glue groove for accommodating glue for bonding the bearing sleeve to the inner wall of the installation hole.
The power mechanism according to claim 23, characterized in that, the inner wall of the bearing sleeve and the outer wall of the oil-impregnated bearing are bonded and fixed by glue.
The power mechanism according to claim 23, wherein the motor seat is a metal motor seat, and the bearing sleeve is a metal bearing sleeve, wherein,

The bearing sleeve is threadedly connected to the inner side wall of the mounting hole; or,

The bearing sleeve is snap-connected with the motor seat; or,

The bearing sleeve is tightly connected with the motor seat by screws; or,

The bearing sleeve is bonded and fixed to the motor seat.
The power mechanism according to claim 34, wherein the oil-impregnated bearing is a spherical oil-impregnated bearing, and the inner side wall of the installation hole is provided with a boss, and the boss includes a first side and a On the opposite second side, the bearing sleeve is arranged on the first side of the boss, the first side of the boss is provided with a first arc-shaped groove, and the bearing sleeve is provided on the side facing the boss. There is a second arc-shaped groove, and the first arc-shaped groove and the second arc-shaped groove enclose to form a housing cavity for housing the spherical oil-impregnated bearing.
The power mechanism according to claim 35, characterized in that said boss is in clearance fit with said oil-impregnated bearing.
The power mechanism according to claim 35, characterized in that said bearing sleeve and said oil-impregnated bearing are in clearance fit.
The power mechanism according to claim 35, wherein the motor seat includes a first end and a second end opposite to the first end, and the bearing is sleeved on the first end of the motor seat, The distance from the first side of the boss to the end surface of the first end of the motor base is S, and the thickness of the bearing sleeve in the axial direction of the rotating shaft is L, wherein S>L.
The power mechanism according to claim 35, characterized in that, the bearing sleeve is an annular solid structure.
The power mechanism according to claim 35, wherein said bearing housing comprises:

an annular portion abutting against the inner sidewall of the mounting hole;

an arc portion located inside the annular portion, the arc portion encloses and forms the second arc groove;

The connection part is connected between the ring part and the arc part.
The power mechanism of claim 40, wherein:

The annular portion is threadedly connected to the inner sidewall of the mounting hole; or

The ring part is snap-connected with the motor seat; or,

The annular part is bonded and fixed to the motor base; or,

The ring portion is fastened to the motor base by screws; or,

The annular portion is in interference fit with the installation hole.
The power mechanism according to claim 40, characterized in that, the bearing sleeve is integrally formed by stamping.
The power mechanism of claim 35, wherein said bearing assembly further comprises:

The ball bearing is installed in the installation hole and located on the second side of the boss, and the rotating shaft passes through the ball bearing.
The power mechanism according to claim 23, further comprising a stator and a rotor, the stator is installed on the bearing seat, and the rotor is installed on the rotating shaft; the stator also includes an iron core and a plurality of windings , the iron core includes an annular yoke and a plurality of stator teeth, the annular yoke is sleeved on the outer wall of the motor seat, the plurality of stator teeth are arranged at intervals around the annular yoke, each of the stator teeth Winding one of the windings; the rotor also includes an end cover, a surrounding wall and a plurality of permanent magnets, the end cover is connected to the rotating shaft, the surrounding wall surrounds the end cover, and the plurality of permanent magnets The magnets are arranged at intervals around the surrounding wall, and the permanent magnets are opposite to the stator teeth.
A kind of unmanned aerial vehicle, is characterized in that, comprises:

body;

an arm mechanically coupled to the fuselage;

a power mechanism, installed on the arm, for providing flight power for the flight of the unmanned aerial vehicle;

The power mechanism includes a motor and a propeller, the propeller is mounted on the motor and driven to rotate by the motor, wherein the motor includes:

A motor base, the motor base is provided with a mounting hole;

a rotating shaft, the rotating shaft is rotatably installed in the installation hole;

The bearing assembly includes a bearing sleeve and an oil bearing, the bearing sleeve is installed in the installation hole, the oil bearing is at least partly installed in the bearing sleeve, and the rotating shaft passes through the oil bearing;

Wherein, the bearing sleeve is a non-metallic bearing sleeve, one of the bearing sleeve and the motor base is provided with a protrusion, and the other of the bearing sleeve and the motor base is provided with a groove, so The protrusion is embedded in the groove to limit the relative rotation of the bearing sleeve relative to the motor seat; or, the motor seat is a metal motor seat, and the bearing sleeve is a metal bearing sleeve.
The unmanned aerial vehicle according to claim 45, wherein one of the outer sidewall of the bearing sleeve and the inner sidewall of the mounting hole is provided with at least one of the protrusions, and the outer sidewall of the bearing sleeve and the other of the inner sidewalls of the mounting hole is provided with at least one of the grooves.
The unmanned aerial vehicle according to claim 45, wherein the motor base comprises:

The body is provided with the installation hole;

a stopper, installed on the motor seat, and the stopper is used to prevent the bearing sleeve from falling out of the installation hole;

Wherein, one of the stopper and the bearing sleeve is provided with at least one protrusion, and the other of the stopper and the bearing sleeve is provided with at least one groove.
The drone of claim 47, wherein,

The stopper is threadedly connected to the inner side wall of the installation hole; or,

The stopper is snap-connected to the motor seat; or,

The stopper is bonded and fixed to the motor base; or,

The stopper is fastened to the motor base with screws.
The unmanned aerial vehicle according to claim 45, wherein the bearing sleeve is a plastic bearing sleeve.
The unmanned aerial vehicle according to claim 49, wherein the oil-impregnated bearing is a spherical oil-impregnated bearing.
The unmanned aerial vehicle according to claim 50, wherein the bearing sleeve is provided with a spherical inner cavity to fit the spherical oil-impregnated bearing.
The unmanned aerial vehicle according to claim 50, wherein one end of the bearing sleeve is provided with a plurality of axially extending slots, and the plurality of slots are distributed along the circumference of the bearing sleeve at intervals to One end of the bearing sleeve is divided into a plurality of petals, and the oil-impregnated bearing is located in a space enclosed by the plurality of petals.
The unmanned aerial vehicle according to claim 45, characterized in that, the outer wall of the bearing sleeve is bonded and fixed to the inner wall of the installation hole.
The unmanned aerial vehicle according to claim 53, wherein the outer wall of the bearing sleeve is provided with a glue groove for accommodating the glue for bonding the bearing sleeve to the inner wall of the installation hole.
The unmanned aerial vehicle according to claim 45, characterized in that, the inner sidewall of the bearing sleeve and the outer sidewall of the oil-impregnated bearing are bonded and fixed by glue.
The unmanned aerial vehicle according to claim 45, wherein the motor seat is a metal motor seat, and the bearing sleeve is a metal bearing sleeve, wherein,

The bearing sleeve is threadedly connected to the inner side wall of the mounting hole; or,

The bearing sleeve is snap-connected with the motor base; or,

The bearing sleeve is tightly connected with the motor seat by screws; or,

The bearing sleeve is bonded and fixed to the motor base.
The unmanned aerial vehicle according to claim 56, wherein the oil-impregnated bearing is a spherical oil-impregnated bearing, and the inner side wall of the mounting hole is provided with a boss, and the boss includes a first side and is connected to the first side. On the second side opposite to the side, the bearing is sleeved on the first side of the boss, the first side of the boss is provided with a first arc-shaped groove, and the bearing sleeve faces the side of the boss A second arc-shaped groove is provided, and the first arc-shaped groove and the second arc-shaped groove enclose to form a housing cavity for housing the spherical oil-impregnated bearing.
The unmanned aerial vehicle according to claim 57, characterized in that there is a clearance fit between the boss and the oil-impregnated bearing.
The unmanned aerial vehicle according to claim 57, characterized in that, clearance fit between the bearing sleeve and the oil-impregnated bearing.
The unmanned aerial vehicle according to claim 57, wherein the motor base includes a first end and a second end opposite to the first end, and the bearing is sleeved on the first end of the motor base , the distance from the first side of the boss to the end surface of the first end of the motor seat is S, and the thickness of the bearing sleeve in the axial direction of the rotating shaft is L, wherein S>L.
The unmanned aerial vehicle according to claim 57, wherein the bearing sleeve is an annular solid structure.
The unmanned aerial vehicle according to claim 57, wherein the bearing sleeve comprises:

an annular portion abutting against the inner sidewall of the mounting hole;

an arc portion located inside the annular portion, the arc portion encloses and forms the second arc groove;

The connection part is connected between the ring part and the arc part.
The drone of claim 62, wherein:

The annular portion is threadedly connected to the inner sidewall of the mounting hole; or

The ring part is snap-connected with the motor seat; or,

The annular part is bonded and fixed to the motor base; or,

The ring portion is fastened to the motor base by screws; or,

The annular portion is in interference fit with the installation hole.
The unmanned aerial vehicle according to claim 62, wherein the bearing sleeve is integrally formed by stamping.
The drone of claim 57, further comprising:

The ball bearing is installed in the installation hole and located on the second side of the boss, and the rotating shaft passes through the ball bearing.
The drone according to claim 45, further comprising a stator and a rotor, the stator is mounted on the bearing housing, and the rotor is mounted on the shaft; the stator also includes an iron core and a plurality of Winding, the iron core includes an annular yoke and a plurality of stator teeth, the annular yoke is sleeved on the outer wall of the motor base, the plurality of stator teeth are arranged at intervals around the annular yoke, each of the stator teeth wind one of the windings; the rotor also includes an end cover, a surrounding wall and a plurality of permanent magnets, the end cover is connected to the rotating shaft, the surrounding wall surrounds the end cover, and the plurality of The permanent magnets are arranged at intervals around the surrounding wall, and the permanent magnets are opposite to the stator teeth.