WO2021077373A1

WO2021077373A1 - Electric motor, power device, movable platform, and method for mounting electric motor

Info

Publication number: WO2021077373A1
Application number: PCT/CN2019/113096
Authority: WO
Inventors: 都涛
Original assignee: 深圳市大疆创新科技有限公司
Priority date: 2019-10-24
Filing date: 2019-10-24
Publication date: 2021-04-29
Also published as: CN112106280A

Abstract

Disclosed are an electric motor (100), a power device (400), a movable platform (1000), and a method for mounting an electric motor. The electric motor (100) comprises a stator (10), a rotor (20) and a bearing assembly (30). The stator (10) comprises a base (11); the rotor (20) comprises a rotating shaft (24); and the bearing assembly (30) comprises a ball bearing (31) and an oil bearing (32). The ball bearing (31) and the oil bearing (32) are accommodated inside the base (11), and the rotating shaft (24) penetrates through the base (11).

Description

Motor, power unit, movable platform and motor installation method

Technical field

This application relates to the field of motor technology, and in particular to a motor, a power device, a movable platform, and a motor installation method.

Background technique

Generally, a motor includes a relatively fixed stator and a rotatable rotor. During operation, the motor uses three-phase electricity to generate a variable magnetic field to drive the rotor to rotate, thereby outputting speed and torque. Among them, the smaller the resistance when the rotor rotates, the smaller the frictional heating of the motor, and the better the performance of the motor. Therefore, in order to improve the performance of the motor, two bearings are usually installed to support the rotor to reduce the resistance of the rotor. However, when the rotor is rotating at a high speed, the concentricity between the two bearings is difficult to meet the requirements, which easily leads to unstable operation of the motor. Therefore, how to design a motor that can not only reduce the rotation resistance of the rotor, but also meet the concentricity of the bearing is an urgent problem to be solved by those skilled in the art.

Summary of the invention

The application provides a motor, a power device, a movable platform, and a motor installation method.

The embodiment of the present application provides a motor. The motor includes a stator, a rotor, and a bearing assembly. The stator includes a base. The base includes a first end surface and a second end surface opposite to each other. The base is provided with a mounting hole penetrating the first end surface and the second end surface. The mounting hole includes a first sub-mounting hole penetrating through the first end surface and a second end surface penetrating through the second end surface. The second sub mounting hole. The rotor includes a rotating shaft, and the rotating shaft is penetrated with a mounting hole. The bearing assembly includes ball bearings and spherical or ellipsoidal oil-impregnated bearings. The ball bearings are installed in the first sub-mounting hole, and the oil-impregnated bearings are installed in the second sub-mounting hole. The rotating shaft is equipped with ball bearings and oil-impregnated bearings. The oil-impregnated bearings and ball bearings are shared Support the rotation of the shaft.

The embodiment of the present application also provides a power device, which includes a motor and an executive component. The motor includes a stator, a rotor and a bearing assembly. The stator includes a base. The base includes a first end surface and a second end surface opposite to each other. The base is provided with a mounting hole penetrating the first end surface and the second end surface. The mounting hole includes a first sub-mounting hole penetrating through the first end surface and a second end surface penetrating through the second end surface. The second sub mounting hole. The rotor includes a rotating shaft, and the rotating shaft is penetrated with a mounting hole. The bearing assembly includes ball bearings and spherical or ellipsoidal oil-impregnated bearings. The ball bearings are installed in the first sub-mounting hole, and the oil-impregnated bearings are installed in the second sub-mounting hole. The rotating shaft is equipped with ball bearings and oil-impregnated bearings. The oil-impregnated bearings and ball bearings are shared Support the rotation of the shaft. The actuator is connected with the motor, and the motor can drive the actuator to move.

The embodiment of the present application also provides a movable platform, which includes a movable body and a power device. The power plant includes a motor and execution parts. The motor includes a stator, a rotor and a bearing assembly. The stator includes a base. The base includes a first end surface and a second end surface opposite to each other. The base is provided with a mounting hole penetrating the first end surface and the second end surface. The mounting hole includes a first sub-mounting hole penetrating through the first end surface and a second end surface penetrating through the second end surface. The second sub mounting hole. The rotor includes a rotating shaft, and the rotating shaft is penetrated with a mounting hole. The bearing assembly includes ball bearings and spherical or ellipsoidal oil-impregnated bearings. The ball bearings are installed in the first sub-mounting hole, and the oil-impregnated bearings are installed in the second sub-mounting hole. The rotating shaft is equipped with ball bearings and oil-impregnated bearings. The oil-impregnated bearings and ball bearings are shared Support the rotation of the shaft. The actuator is connected with the motor, and the motor can drive the actuator to move. The power device is arranged on the movable body.

The embodiment of the present application also provides a motor installation method. The motor installation method includes: providing a stator, the stator includes a base, the base includes a first end surface and a second end surface opposite to each other, and the base is provided with a penetrating through the first end surface and the second end surface. The mounting hole includes a first sub-mounting hole penetrating the first end surface and a second sub-mounting hole penetrating the second end surface; providing a rotor, the rotor including a rotating shaft; and providing a bearing assembly, the bearing assembly including a ball bearing and a spherical or Ellipsoidal oil-impregnated bearing; install the ball bearing in the first sub-mounting hole from the first end surface; insert the rotating shaft through the mounting hole and fit with the ball bearing; install the oil-impregnated bearing on the second end surface from the second end surface The sub-mounting hole is sleeved on the rotating shaft, so that the oil-impregnated bearing and the ball bearing jointly support the rotation of the rotating shaft.

The motor, power unit, movable platform, and motor installation method of the present application utilize a ball bearing and a spherical or ellipsoidal oil-impregnated bearing to jointly support the rotation of the shaft. On the one hand, the arrangement of the ball bearing can reduce the resistance of the shaft of the rotor. , While ensuring the performance of the motor, it can prolong the service life of the motor; on the other hand, during the rotation of the shaft, the oil-impregnated bearing can automatically adjust the concentricity with the ball bearing to achieve automatic centering and ensure the stability of the motor. Moreover, because the oil-impregnated bearing itself is cheap, the cost of the entire motor is also saved.

The additional aspects and advantages of the embodiments of the present application will be partly given in the following description, and part of them will become obvious from the following description, or be understood through the practice of the embodiments of the present application.

Description of the drawings

The above and/or additional aspects and advantages of the present application will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, in which:

FIG. 1 is a schematic diagram of a three-dimensional assembly of a motor according to some embodiments of the present application;

Fig. 2 is another perspective view of the assembly of the motor shown in Fig. 1 from another angle;

Fig. 3 is a three-dimensional exploded schematic diagram of the motor shown in Fig. 1;

Fig. 4 is a schematic perspective cross-sectional view of the base of the stator in the motor shown in Fig. 3.

Fig. 5 is a three-dimensional enlarged schematic view of the bearing sleeve of the bearing assembly in the motor shown in Fig. 3;

Figure 6 is a top view of the motor in Figure 1 with the end cover removed;

Fig. 7 is a schematic cross-sectional view of the motor in Fig. 1 along the line VII-VII;

FIG. 8 is a schematic cross-sectional view of the motor in some embodiments of the present application taken along the cross-sectional line corresponding to the line VII-VII in FIG. 7;

Fig. 9 is a three-dimensional structural diagram of the bearing sleeve of the bearing assembly of the motor in Fig. 8;

10 and 11 are schematic diagrams of the three-dimensional structure of the power plant according to some embodiments of the present application;

FIG. 12 is a schematic diagram of a three-dimensional structure of a movable platform according to some embodiments of the present application;

Figures 13 to 17 are flowcharts of a motor installation method according to some embodiments of the present application.

Detailed ways

The implementation of the present application will be further described below in conjunction with the accompanying drawings. The same or similar reference numerals in the drawings indicate the same or similar elements or elements with the same or similar functions throughout.

In addition, the implementation manners of the present application described below in conjunction with the drawings are exemplary, and are only used to explain the implementation manners of the application, and should not be construed as limiting the application.

In this application, unless expressly stipulated and defined otherwise, the first feature “on” or “under” the second feature may be in direct contact with the first and second features, or the first and second features may be indirectly through an intermediary. contact. Moreover, the "above", "above" and "above" of the first feature on the second feature may mean that the first feature is directly above or diagonally above the second feature, or it simply means that the level of the first feature is higher than the second feature. The “below”, “below” and “below” of the second feature of the first feature may be that the first feature is directly below or obliquely below the second feature, or it simply means that the level of the first feature is smaller than the second feature.

Please refer to FIG. 1 and FIG. 7, this application provides a motor 100. The motor 100 includes a stator 10, a rotor 20 and a bearing assembly 30. The stator 10 includes a base 11. The base 11 includes a first end surface 111 and a second end surface 112 opposite to each other. The base 11 is provided with a mounting hole 110 penetrating through the first end surface 111 and the second end surface 112. The mounting hole 110 includes a first end surface 111 penetrating through it. The first sub-mounting hole 113 and the second sub-mounting hole 114 passing through the second end surface 112. The rotor 20 includes a rotating shaft 24 through which a mounting hole 110 is penetrated. The bearing assembly 30 includes a ball bearing 31 and a spherical or ellipsoidal oil-impregnated bearing 32. The ball bearing 31 is installed in the first sub-mounting hole 113, the oil-impregnated bearing 32 is installed in the second sub-mounting hole 114, and the rotating shaft 24 passes through the ball bearing 31 and The oil-retaining bearing 32, and the oil-retaining bearing 32 and the ball bearing 31 jointly support the rotation of the rotating shaft 24.

Please refer to FIG. 10 and FIG. 11, the present application also provides a power device 400, and the power device 400 includes a motor 100 and an execution component 300. The motor 100 includes a stator 10, a rotor 20 and a bearing assembly 30. The stator 10 includes a base 11. The base 11 includes a first end surface 111 and a second end surface 112 opposite to each other. The base 11 is provided with a mounting hole 110 penetrating through the first end surface 111 and the second end surface 112. The mounting hole 110 includes a first end surface 111 penetrating through it. The first sub-mounting hole 113 and the second sub-mounting hole 114 passing through the second end surface 112. The rotor 20 includes a rotating shaft 24 through which a mounting hole 110 is penetrated. The bearing assembly 30 includes a ball bearing 31 and a spherical or ellipsoidal oil-impregnated bearing 32. The ball bearing 31 is installed in the first sub-mounting hole 113, the oil-impregnated bearing 32 is installed in the second sub-mounting hole 114, and the rotating shaft 24 passes through the ball bearing 31 and The oil-retaining bearing 32, and the oil-retaining bearing 32 and the ball bearing 31 jointly support the rotation of the rotating shaft 24. The actuator 300 is connected to the motor 100, and the motor 100 can drive the actuator 300 to move.

Referring to FIG. 12, the present application also provides a movable platform 1000. The movable platform 1000 includes a movable body 500 and a power device 400, and the power device 400 is disposed on the movable body 500. The power plant 400 includes a motor 100 and an execution component 300. The motor 100 includes a stator 10, a rotor 20 and a bearing assembly 30. The stator 10 includes a base 11. The base 11 includes a first end surface 111 and a second end surface 112 opposite to each other. The base 11 is provided with a mounting hole 110 penetrating through the first end surface 111 and the second end surface 112. The mounting hole 110 includes a first end surface 111 penetrating through it. The first sub-mounting hole 113 and the second sub-mounting hole 114 passing through the second end surface 112. The rotor 20 includes a rotating shaft 24 through which a mounting hole 110 is penetrated. The bearing assembly 30 includes a ball bearing 31 and a spherical or ellipsoidal oil-impregnated bearing 32. The ball bearing 31 is installed in the first sub-mounting hole 113, the oil-impregnated bearing 32 is installed in the second sub-mounting hole 114, and the rotating shaft 24 passes through the ball bearing 31 and The oil-retaining bearing 32, and the oil-retaining bearing 32 and the ball bearing 31 jointly support the rotation of the rotating shaft 24. The actuator 300 is connected to the motor 100, and the motor 100 can drive the actuator 300 to move.

Please refer to Figure 13, this application also provides a motor installation method, including:

01: Provide a stator 10, the stator 10 includes a base 11, the base 11 includes a first end surface 111 and a second end surface 112 opposite to each other, the base 11 is provided with a mounting hole 110 penetrating the first end surface 111 and the second end surface 112, the mounting hole 110 includes a first sub-mounting hole 113 penetrating through the first end surface 111 and a second sub-mounting hole 114 penetrating through the second end surface 112;

02: A rotor 20 is provided, and the rotor 20 includes a rotating shaft 24;

03: Provide a bearing assembly 30, which includes a ball bearing 31 and a spherical or ellipsoidal oil-retaining bearing 32;

04: Install the ball bearing 31 in the first sub-mounting hole 113 from the first end surface 111;

05: Insert the rotating shaft 24 through the mounting hole 110 and cooperate with the ball bearing 31; and

06: The oil-impregnated bearing 32 is installed in the second sub-mounting hole 114 from the second end surface 112 and sleeved on the rotating shaft 24, so that the oil-impregnated bearing 32 and the ball bearing 31 jointly support the rotation of the rotating shaft 24.

The motor 100, the power unit 200, the movable platform 1000 and the motor installation method provided in this application utilize a ball bearing 31 and a spherical or ellipsoidal oil-retaining bearing 32 to jointly support the rotation of the rotating shaft 24. On the one hand, the arrangement of the ball bearing 31 It can reduce the resistance to the rotation of the shaft 24 of the rotor 20, and ensure the performance of the motor 100 while prolonging the service life of the motor 100; on the other hand, during the rotation of the shaft 24, the oil-impregnated bearing 32 can automatically adjust to the ball bearing 31 The concentricity realizes automatic centering and ensures the stability of the motor 100. Moreover, since the cost of the oil-impregnated bearing 32 itself is cheap, the cost of the entire motor 100 is also saved.

The embodiments of the present application will be further described below in conjunction with the accompanying drawings:

Referring to FIGS. 1 to 3, the motor 100 provided by the embodiment of the present application includes a stator 10, a rotor 20 and a bearing assembly 30. The bearing assembly 30 is housed in the stator 10, and the rotor 20 is inserted through the bearing assembly 30.

Please refer to FIG. 3, the stator 10 includes a base 11, an iron core 12 and a plurality of winding wires 13. The iron core 12 is installed on the base 11, and a plurality of winding wires 13 are sleeved on the iron core 12.

Specifically, referring to FIGS. 4 and 7 together, the base 11 includes a first end surface 111 and a second end surface 112 opposite to each other. The base 11 is provided with a mounting hole 110 penetrating through the first end surface 111 and the second end surface 112. The mounting hole 110 includes a first sub-mounting hole 113 penetrating through the first end surface 111, a second sub-mounting hole 114 penetrating through the second end surface 112, and a first sub-mounting hole 114 disposed between the first sub-mounting hole 113 and the second sub-mounting hole 114. Three sub-mounting holes 115. The third sub-mounting hole 115 communicates with the first sub-mounting hole 113 and the second sub-mounting hole 114. A first step surface 116 is formed between the first sub mounting hole 113 and the third sub mounting hole 115, and a second step surface 117 is formed between the second sub mounting hole 114 and the third sub mounting hole 115. The first sub-mounting hole 113 is used to receive the ball bearing 31. The second sub-mounting hole 114 is used to receive the oil-impregnated bearing 32.

The base 11 further includes an end 118, the first sub-mounting hole 113 is opened at the end 118, and the outer side of the end 118 is provided with an annular recess 1183. The end 118 forms a first limiting member 1181 and a second limiting member 1182 through a pressure riveting process. The first limiting member 1181 extends into the first sub-mounting hole 113 to block the balls received in the first sub-mounting hole 113 The bearing 31 is separated from the first sub-mounting hole 113, and the second limiting member 1182 is located outside the first sub-mounting hole 113.

Further, the base 11 may be made of aluminum alloy material. Because the aluminum alloy material has a low rigidity and has a certain deformation ability under high pressure, the base 11 made of aluminum alloy material is easy to perform the riveting process on its end 118, and The cost of the aluminum alloy material is low, and the use of the aluminum alloy material can reduce the manufacturing cost of the motor 100.

Please refer to FIGS. 3, 4, 6 and 7 together, the iron core 12 is sleeved on the end 118 of the base 11. Specifically, the iron core 12 includes an annular center body 121 and a plurality of sleeve portions 122 radiatingly extending from the outer peripheral surface of the center body 121. The central body 121 is sleeved on the end 118, and the lower surface of the central body 121 bears on the bottom surface of the recess 1183, and the upper surface of the central body 121 abuts the second limiting member 1182. That is, the bottom surface of the recess 1183 supports the lower surface of the central body 121 to limit the position where the iron core 12 is installed on the base 11, and the second limiting member 1182 interferes with the central body 121 to prevent the iron core 12 from being separated from the end 118 .

The multiple winding wires 13 correspond to the multiple sleeve portions 122, and each winding wire 13 is sleeved on the corresponding sleeve portion 122. A three-phase alternating current is applied to a plurality of winding wires 13, and the current in the winding wires 13 and the iron core 12 sheathed by the winding wires 13 generate a changing magnetic field to drive the rotor 20 to rotate.

Please refer to FIGS. 3 and 6, the rotor 20 includes an end cover 21, a holder 22, a plurality of permanent magnets 23 and a rotating shaft 24. The holder 22 and the permanent magnet 23 are installed on the inner wall of the end cover 21, and the end cover 21 is fixedly connected to one end of the rotating shaft 24.

Specifically, the end cap 21 has a cylindrical shape, and includes a top wall 211 and a peripheral wall 212 extending from the periphery of the top wall 211. The peripheral wall 212 includes an inner wall 2122.

The holder 22 is installed in the peripheral wall 212 and attached to the inner wall 2122. The holder 22 includes an annular base 221 and a plurality of magnetic isolation arms 222 extending from the annular base 221. A groove 223 is formed between every two magnetic isolation arms 222. The shape of the holder 22 matches the shape of the peripheral wall 212, so that the holder 22 can better fit the inner wall 2122.

The plurality of permanent magnets 23 correspond to the plurality of grooves 223, and each permanent magnet 23 is disposed in the corresponding groove 223. The plurality of permanent magnets 23 are opposed to the pair of winding wires 13. The surfaces of the two adjacent permanent magnets 23 close to the inner wall 2122 have opposite polarities. The magnetic isolation arm 222 can isolate the two adjacent permanent magnets 23 from each other to prevent the permanent magnets 23 from attracting or repelling each other and causing positional movement. In one example, the permanent magnet 23 is fixedly connected to the holder 22, but not to the inner wall 2122; in another example, the permanent magnet 23 is fixedly connected to the holder 22 while also being fixedly connected to the inner wall 2122; in another In the example, the permanent magnet 23 is not fixedly connected to the holder 22, but only fixedly connected to the inner wall 2122. At this time, the permanent magnet 23 is still received in the groove 223. Regardless of the above-mentioned fixed connection method, when a plurality of windings 13 are passed through a three-phase alternating current to generate a changing magnetic field, the plurality of permanent magnets 23 can be driven by the magnetic field to drive the end cover 21 to rotate (the permanent magnet 23 drives the cage 22 rotates, the holder 22 then drives the end cover 21 to rotate; or the permanent magnet 23 directly drives the end cover 21 to rotate), thereby driving the rotation shaft 24 connected to the end cover 21 to rotate.

Among them, any one of the connection between the permanent magnet 23 and the holder 22, the connection between the permanent magnet 23 and the inner wall 2122, and the connection between the holder 22 and the inner wall 2122 can be glued with anaerobic glue or other glue, or it can be a card. It is not limited here to connect by welding or welding, or by combining multiple connection methods.

Please refer to FIGS. 3 and 4, the rotating shaft 24 includes a first end 241 and a second end 242. The rotating shaft 24 passes through the mounting hole 110 of the base 11, the first end 241 is connected to the end cover 21, the second end 242 is received in the second sub-mounting hole 114 and cooperates with the oil bearing 32, the rotating shaft 24 is located at the first end 241 and A part between the second ends 242 is received in the first sub-mounting hole 113 and matched with the roller bearing 31.

Please refer to FIGS. 3, 5 and 7, the bearing assembly 30 includes a ball bearing 31, an oil-impregnated bearing 32 and a bearing sleeve 33.

3 and 7 together, the ball bearing 31 includes an inner ring 311, an outer ring 312 surrounding the inner ring 311, and balls (not shown) between the inner ring 311 and the outer ring 312. The outer ring 312 is fixed relative to the base 11, and the inner ring 311 can rotate relative to the outer ring 312. The ball bearing 31 further includes an upper end surface 313 and a lower end surface 314 opposite to each other.

The ball bearing 31 is installed at the end 118 and received in the first sub-mounting hole 113. Specifically, the outer ring 312 of the ball bearing 31 can be connected to the outer ring 312 by at least one of gluing, snapping, screw connection, and welding. The end portion 118 is fixedly connected. At this time, the lower end surface 314 of the ball bearing 31 is in contact with the first step surface 116. After the outer ring 312 is fixedly connected to the end portion 118, the end portion 118 is subjected to the pressure riveting process, and the first limiting member 1181 formed can interfere with the upper end surface 313 of the ball bearing 31. At this time, even the above-mentioned connection method fails , The first limiting member 1181 can also prevent the ball bearing 31 from being disengaged from the first sub-mounting hole 113, which improves the stability of the ball bearing 31 installation.

In some embodiments, the rotation shaft 24 and the roller bearing 31 may be matched by an interference fit. The amount of interference between the rotating shaft 24 and the roller bearing 31 should be moderate. If the amount of interference is too large, the ball bearing 31 will be stuck, causing the rotating friction of the rotating shaft 24 to increase, thereby reducing the performance of the motor 100; If the amount is too small, the rotating shaft 24 will escape from the ball bearing 31, resulting in that the rotating shaft 24 cannot be stably connected with the stator 10, so that the motor 100 cannot work normally. In order to avoid the occurrence of these two situations, the amount of interference between the rotating shaft 24 and the ball bearing 31 should be between the preset maximum value and the preset minimum value. The preset maximum value is the interference between the rotating shaft 24 and the ball bearing 31 and the preset minimum value is the interference when the rotating shaft 24 is pulled out of the ball bearing 31. For example, for a ball bearing with φ2, the maximum value of the interference between the two is 0.013mm, and the minimum value of the interference is 0.003mm. When the interference is within this range, that is, greater than or equal to 0.003mm and less than or equal to 0.013mm, the rotating shaft 24 can be firmly installed in the ball bearing 31, and can rotate normally without interference with the ball bearing 31 The force is too large to be jammed. At the same time, when the rotating shaft 24 is rotating, it will not fall out of the ball bearing 31 due to the too small force between the bearing 24 and the ball bearing 31, which improves the stability of the connection between the bearing 24 and the ball bearing 31. Sex.

In some embodiments, the connection mode between the rotating shaft 24 and the ball bearing 31 may be a connection mode combining at least one of gluing, welding, snapping, screw connection and the like with interference fit. On the basis of the interference fit connection method, adding at least one of gluing, welding, clamping, screw connection, etc., can further improve the stability of the connection between the bearing 24 and the ball bearing 31. Among them, compared to only the gluing method, the combination of gluing and interference fit can be used when the rotating shaft 24 rotates at a high speed and rubs with the ball bearing 31 to generate a lot of heat, which causes the glued connection to fail (gluing). The positive fit connection mode can still ensure the stability of the connection between the bearing 24 and the ball bearing 31. Of course, in other embodiments, the rotating shaft 24 may also be fixedly connected to the ball bearing 31 by at least one of welding, clamping, screw connection, etc., which is not limited herein.

Please continue to refer to FIGS. 3 and 7 together. In one example, the oil-impregnated bearing 32 is spherical and includes a first surface 321 and a second surface 322 at both ends, and an outer wall connecting the first surface 321 and the second surface 322 323. The first surface 321 and the second surface 322 are both flat, the outer side wall 323 is arc-shaped and is a part of the spherical outer side wall, and the cross section of the oil-impregnated bearing 32 taken along the direction perpendicular to the first plane 321 is circular. The oil-impregnated bearing 32 has a through hole 320 penetrating through the first surface 321 and the second surface 322. The oil bearing 32 is sleeved on the second end 242 of the rotating shaft 24 and installed in the second sub-mounting hole 114. Since the oil-impregnated bearing 32 is spherical, it can rotate freely in the second sub-mounting hole 114 to adjust its concentricity with the ball bearing 31, thereby improving the working stability of the motor 100.

In another example, the oil-impregnated bearing 32 has an ellipsoidal shape, and includes a first surface 321 and a second surface 322 at two ends, and an outer side wall 323 connecting the first surface 321 and the second surface 322. The first surface 321 and the second surface 322 are both flat, the outer side wall 323 is arc-shaped and is a part of the ellipsoidal outer side wall, and the cross section of the oil-impregnated bearing 32 taken along the direction perpendicular to the first plane 321 is elliptical. The oil-impregnated bearing 32 has a through hole 320 penetrating through the first surface 321 and the second surface 322. The oil bearing 32 is sleeved on the second end 242 of the rotating shaft 24 and installed in the second sub-mounting hole 114. The oil bearing 32 is sleeved on the second end 242 of the rotating shaft 24 and installed in the second sub-mounting hole 114. Since the oil-impregnated bearing 32 is ellipsoidal, it can rotate freely in the second sub-mounting hole 114 to adjust its concentricity with the ball bearing 31, thereby improving the working stability of the motor 100.

Specifically, the second end 242 of the rotating shaft 24 passes through the through hole 320. In some embodiments, the diameter of the through hole 320 may be the same as the diameter of the inner ring 311 of the ball bearing 31. At this time, in one example, the diameter D1 of the joint of the rotating shaft 24 and the ball bearing 31 may be larger than that of the rotating shaft 24 and the oil-containing The diameter D2 of the fitting position of the bearing 32 is such that when the shaft 24 penetrates the base 11 from the first sub-mounting hole 113, the second end 242 can easily pass through the ball bearing 31, and when the second end 242 reaches the oil-impregnated bearing 32 At this time, the rotating shaft 24 and the ball bearing 31 can achieve an interference fit. In another example, the diameter of the rotating shaft 24 is gradually reduced from the position where the rotating shaft 24 and the ball bearing 31 are fitted to the position where the rotating shaft 24 and the oil-impregnated bearing 32 are fitted. It is also possible to make the rotating shaft 24 penetrate the base from the first sub-mounting hole 113 At 11 o'clock, the second end 242 can easily pass through the ball bearing 31. When the second end 242 reaches the fitting position with the oil bearing 32, the rotating shaft 24 and the ball bearing 31 can achieve an interference fit. Furthermore, the rotating shaft 24 with a gradually reduced diameter can be more smoothly matched with the ball bearing 31 and the oil-impregnated bearing 32.

Please refer to FIG. 3, FIG. 5 and FIG. 7 together, the bearing sleeve 33 can be installed and received in the second sub-mounting hole 114 by at least one of gluing, snapping, and threaded connection. For example, the bearing sleeve 33 is installed in the second sub-mounting hole 114 by gluing; or, the bearing sleeve 33 is installed in the second sub-mounting hole 114 by snapping; or, the bearing sleeve 33 is installed in the second sub-mounting hole 114 by screwing. In the second sub-mounting hole 114; or, the bearing sleeve 33 is mounted in the second sub-mounting hole 114 by a combination of gluing and snapping, etc., which are not listed here.

Specifically, the bearing sleeve 33 is sleeved on the outer side wall 323 of the oil-impregnated bearing 32 and is used to provide a deformation space for the rotation of the oil-impregnated bearing 32. The oil-impregnated bearing 32 can rotate in the bearing sleeve 33 to adjust the concentricity with the ball bearing 31. In order to provide deformation space for the rotation of the oil-impregnated bearing 32, the bearing sleeve 33 may be made of an elastic material. In one example, the bearing sleeve 33 is made of plastic material to ensure that the bearing sleeve 33 has a certain deformation ability. In another example, the bearing sleeve 33 can be made of plastic and glass fiber materials to ensure that the bearing sleeve 33 has a certain deformability. At the same time, the addition of glass fiber can increase the toughness of the bearing sleeve 33 and prolong the service life of the bearing sleeve 33; In another example, the bearing sleeve 33 may be made of an elastic metal material to ensure that the bearing sleeve 33 has a certain deformability, while the bearing sleeve 33 made of metal has strong rigidity and toughness, wear resistance and durability, and has a long service life. , Do not need to be replaced frequently.

Please continue to refer to Figures 3, 5 and 7 together. In one embodiment, the bearing sleeve 33 is sleeved on the outer side wall 323 of the oil-impregnated bearing 32. The bearing sleeve 33 includes an annular base 331 and a self-contained ring base 331. The sidewall 332 from which the surface 3311 extends. The side wall 332 is provided with a plurality of notches 3324 in the direction from the top surface 3321 of the side wall 332 to the surface 3311, and an extension arm 3322 is formed between every two notches 3324, and the plurality of extension arms 3322 enclose a receiving cavity 3320 for use于Accommodation oil bearing 32. The inner surface 3225 of each extension arm 322 may be arc-shaped, so that the receiving cavity 3320 is spherical or ellipsoidal, so as to better match with the spherical or ellipsoidal oil bearing 32.

When the bearing sleeve 33 is installed in the second sub-mounting hole 114 and sleeved on the outer side wall 323 of the oil-impregnated bearing 32, the top surface 3321 of the side wall 332 of the bearing sleeve 33 conflicts with the second stepped surface 117, in other words, the second The stepped surface 117 limits the position of the oil-impregnated bearing 32 in the second sub-mounting hole 114. The outer side wall 323 of the oil-impregnated bearing 32 can be completely attached to the inner surface 3225 of the extension arm 3322, and the arc-shaped attachment (spherical attachment or ellipsoidal attachment) allows the oil-impregnated bearing 32 to be easily rotated in the receiving cavity 3320 Therefore, it is easy to adjust the concentricity of the oil-impregnated bearing 32 and the ball bearing 31. Moreover, the notch 3324 is provided on the side wall 332, which can increase the ability of the bearing sleeve 33 to provide deformation space for the oil-impregnated bearing 32, and further facilitate the easy rotation of the oil-impregnated bearing 32 in the receiving cavity 3320, thereby making it easier to adjust the oil-impregnated bearing 32 and the ball bearing 31 Concentricity.

Optionally, referring to FIG. 5, in another embodiment, the bearing sleeve 33 may further include a plurality of protrusions 333. Specifically, the outer surface of each extension arm 3322 is provided with at least two protrusions 333, and a glue groove 3330 for accommodating glue is formed between every two protrusions 333. When the bearing sleeve 33 is installed in the second sub-mounting hole 114 by at least a glued connection, the glue groove 3330 can be used to hold more glue to make the glued connection with the base 11 stronger.

In summary, the motor 100 of the present application uses a ball bearing 31 and a spherical or ellipsoidal oil-retaining bearing 32 to jointly support the rotation of the rotating shaft 24. On the one hand, the arrangement of the ball bearing 31 can reduce the resistance of the rotating shaft 24 of the rotor 20 to rotation. While ensuring the performance of the motor 100, the service life of the motor 100 can be prolonged; on the other hand, during the rotation of the shaft 24, the oil-impregnated bearing 32 can automatically adjust the concentricity with the ball bearing 31 to realize automatic centering and ensure the operation of the motor 100 The stability. Moreover, since the cost of the oil-impregnated bearing 32 itself is cheap, the cost of the entire motor 100 is also saved.

Referring to FIGS. 8 and 9, another embodiment of the present invention provides a motor 200. The structure of the motor 200 is basically the same as the structure of the motor 100 of the foregoing embodiment, except that the structure of the base 14 is the same as any of the foregoing. The structure of the base 11 of the embodiment is different, and the structure of the bearing sleeve 34 is different from the structure of the bearing sleeve 33 of any of the foregoing embodiments.

Specifically, the base 14 includes a first end surface 141 and a second end surface 142 opposite to each other. The base 14 is provided with a mounting hole 140 penetrating through the first end surface 141 and the second end surface 142. The mounting hole 140 includes a first sub-mounting hole 143 penetrating through the first end surface 141, a second sub-mounting hole 144 penetrating through the second end surface 142, and a first sub-mounting hole 143 and a second sub-mounting hole 144 provided between the first sub-mounting hole 143 and the second sub-mounting hole 144. Three mounting holes 145. The third sub-mounting hole 145 communicates with the first sub-mounting hole 143 and the second sub-mounting hole 144. A first step surface 146 is formed between the first sub-mounting hole 143 and the third sub-mounting hole 145. The second sub-mounting hole 144 includes a first cavity 1441 penetrating through the second end surface 142 and a second cavity 1442 communicating with the first cavity 1441, a second stepped surface 147 formed between the first cavity 1441 and the second cavity 1442, The second cavity 1442 communicates with the third sub mounting hole 145. In the direction from the first cavity 1441 to the third sub-mounting hole 145, the opening size of the cross section of the second cavity 1442 gradually decreases. The inner surface of the second cavity 1442 is arc-shaped and matches the upper end of the outer side wall 323 of the oil-containing bearing 32. The first sub-mounting hole 143 is used for accommodating the ball bearing 31. The second sub-mounting hole 144 is used for receiving the oil-impregnated bearing 32 and the bearing sleeve 34.

The bearing sleeve 34 is accommodated in the first cavity 1441 and the second cavity 1442. The material of the bearing sleeve 34 can be the same as described above, for example, made of elastic metal. Specifically, the bearing sleeve 34 includes a hollow annular sleeve 341 and a plurality of elastic pieces 342 extending from the inner wall 3412 of the sleeve 341. Both the sleeve 341 and the elastic piece 342 conflict with the second stepped surface 147. A plurality of elastic pieces 342 are distributed around the center of the sleeve 341 at intervals, and collectively enclose a limiting cavity 343. The inner surface of each elastic piece 342 close to the center of the sleeve 341 is arc-shaped and matches the lower end of the outer side wall 323 of the oil-containing bearing 32 (the structure is the same as the aforementioned structure). The elastic piece 342 in the bearing sleeve 34 can move in the first cavity 1441 and the second cavity 1442 to provide a deformation space for the rotation of the oil-containing bearing 32.

Similarly, the oil-impregnated bearing 32 can rotate in the bearing sleeve 34 to adjust the concentricity with the ball bearing 31. When the oil-impregnated bearing 32 is installed in the second sub-mounting hole 144, the upper end of the outer side wall 323 of the oil-impregnated bearing 32 can be completely attached to the inner surface of the second cavity 1442, and the lower end of the outer side wall 323 of the oil-impregnated bearing 32 can be in contact with the elastic piece 342. The inner surface of the oil-impregnated bearing is completely attached, and the arc-shaped attachment (spherical or ellipsoidal attachment) allows the oil-impregnated bearing 32 to be easily rotated in the limit cavity 343, so that it is easy to adjust the oil-impregnated bearing 32 and the ball bearing 31 Concentricity.

The motor 200 of the present application uses a ball bearing 31 and a spherical or ellipsoidal oil-retaining bearing 32 to jointly support the rotation of the shaft 24. On the one hand, the arrangement of the ball bearing 31 can reduce the rotation resistance of the shaft 24 of the rotor 20 and ensure that the motor 200 The performance of the motor 200 can prolong the service life of the motor 200; on the other hand, during the rotation of the shaft 24, the oil-impregnated bearing 32 can automatically adjust the concentricity with the ball bearing 31 to achieve automatic centering and ensure the stability of the motor 200. . Moreover, since the cost of the oil-impregnated bearing 32 itself is cheap, the cost of the entire motor 200 is also saved.

10 and FIG. 11, the present application also provides a power plant 400, the power plant 400 includes any of the above-mentioned embodiments of the

motor

100, 200 and the execution part 300, the

motor

100, 200 and the execution part 300 are connected to The actuator 300 is driven to move.

Referring to FIG. 10, in one embodiment, the execution component 300 may include a propeller 301, and the

motors

100 and 200 are connected to the propeller 301 to drive the propeller 301 to move. 7 and 8, when the stator 10 in the

motors

100 and 200 drives the mover 20 to rotate, it drives the propeller 301 connected to the end cover 21 of the mover 20 to rotate, thereby generating lift.

Referring to FIG. 11, in another embodiment, the execution component 300 may include a pan-tilt shaft arm, and the

motors

100 and 200 are connected with the pan-tilt shaft arm to drive the pan-tilt shaft arm to move. Specifically, a three-axis pan/tilt head is taken as an example for description. In a three-axis pan/tilt head, the pan/tilt axis arm includes a first axis arm 302 (yaw axis arm), a second axis arm 303 (roll axis arm), and a first axis arm 303 (roll axis arm). Three axis arm 304 (pitch axis arm). A

motor

100, 200 is connected with the first shaft arm 302 to drive the first shaft arm 302 to rotate around the yaw axis; a

motor

100, 200 is connected with the second shaft arm 303 to drive the second shaft arm 303 around the horizontal The roller rotates; a

motor

100, 200 is connected to the third shaft arm 304 to drive the third shaft arm 304 to rotate around the pitch axis.

3, the

motors

100 and 200 in the power plant 400 of the present application use a ball bearing 31 and a spherical or ellipsoidal oil-retaining bearing 32 to jointly support the rotation of the rotating shaft 24. On the one hand, the arrangement of the ball bearing 31 can be reduced. The resistance to the rotation of the shaft 24 of the rotor 20 can ensure the performance of the

motors

100 and 200 while prolonging the service life of the

motors

100 and 200, thereby ensuring the performance of the power unit 400 and prolonging the service life of the power unit 400; on the other hand, During the rotation of the rotating shaft 24, the oil-impregnated bearing 32 can automatically adjust the concentricity with the ball bearing 31 to achieve automatic centering, ensuring the stability of the

motors

100 and 200, and thus the stability of the power unit 400. Moreover, since the cost of the oil-impregnated bearing 32 itself is cheap, the cost of the

entire motors

100 and 200 is also saved, and the cost of the power device 400 can be saved.

Referring to FIG. 12, the present application also provides a movable platform 1000. The movable platform 1000 includes a movable body 500 and the power device 400 of any one of the above embodiments. The power device 400 is disposed on the movable body 500. The movable platform 1000 may be a drone, a mobile robot, a smart car, a smart ship, and the like.

Please continue to refer to FIG. 12, the following description takes the movable platform 1000 as an unmanned aerial vehicle as an example. At this time, the mobile body 500 is a frame. In an embodiment, the execution component 300 includes a propeller 301. At this time, the power device 400 on the movable platform 1000 is set on the arm of the frame. In another embodiment, the execution component 300 includes a first shaft arm 302, a second shaft arm 303, and a third shaft arm 304. At this time, the power device 400 on the movable platform 1000 is arranged at the belly of the frame . In another embodiment, the execution component 300 includes a propeller 301, a first shaft arm 302, a second shaft arm 303, and a third shaft arm 304, and the movable platform 1000 includes two power devices 400, and one power device 400 is provided with On the arm of the frame, another power unit 400 is arranged at the belly of the frame.

3, the

motors

100 and 200 in the movable platform 1000 of the present application use a ball bearing 31 and a spherical or ellipsoidal oil-retaining bearing 32 to jointly support the rotation of the rotating shaft 24. On the one hand, the arrangement of the ball bearing 31 can reduce The resistance to the rotation of the shaft 24 of the small rotor 20 can ensure the performance of the

motors

100 and 200 while prolonging the service life of the

motors

100 and 200, thereby ensuring the performance of the power unit 400 and prolonging the service life of the movable platform 1000; on the other hand, During the rotation of the rotating shaft 24, the oil-impregnated bearing 32 can automatically adjust the concentricity with the ball bearing 31 to realize automatic centering, ensure the stability of the

motors

100 and 200, and thereby ensure the stability of the movable platform 1000. Moreover, since the cost of the oil-impregnated bearing 32 itself is cheap, the cost of the

entire motor

100, 200 is also saved, and the cost of the movable platform 1000 can be saved.

Please refer to FIG. 7 and FIG. 13 together. In some embodiments, a motor installation method suitable for the above-mentioned motor 100 includes:

01: Provide a stator 10, the stator 10 is the same as the previous one, and will not be repeated here;

02: Provide a rotor 20, the rotor 20 is the same as that described above, and will not be repeated here;

03: A bearing assembly 30 is provided. The bearing assembly 30 is the same as the previous one, and will not be repeated here;

05: Insert the rotating shaft 24 through the mounting hole 110 (shown in Figure 4) and fit the ball bearing 31;

06: Install the oil-impregnated bearing 32 in the second sub-mounting hole 114 from the second end surface 112 and sleeve it on the rotating shaft 24.

Wherein 04: the ball bearing 31 is installed in the first sub-mounting hole 113 from the first end surface 111, specifically: the outer ring 312 of the ball bearing 31 is connected by at least one of gluing, snapping, screw connection, welding, etc. The seed is fixedly connected to the end portion 118. At this time, the lower end surface 314 of the ball bearing 31 is in contact with the first stepped surface 116.

In one embodiment, an interference fit is adopted between the rotating shaft 24 and the ball bearing 31. Specifically, please refer to Figs. 7 and 14. 05 includes:

051: Put the ball bearing 31 through the rotating shaft 24;

052: Install the rotating shaft 24 to the ball bearing 31 by means of interference fit.

Among them, the amount of interference between the rotating shaft 24 and the roller bearing 31 should be moderate. If the amount of interference is too large, the ball bearing 31 will be stuck, causing the rotating friction of the rotating shaft 24 to increase, thereby reducing the performance of the motor 100; if If the interference is too small, the rotating shaft 24 will fall out of the ball bearing 31, resulting in that the rotating shaft 24 cannot be stably connected with the stator 10, and the motor 100 cannot work normally. In order to avoid the occurrence of these two situations, the amount of interference between the rotating shaft 24 and the ball bearing 31 should be between the preset maximum value and the preset minimum value. The preset maximum value is the interference between the rotating shaft 24 and the ball bearing 31 and the preset minimum value is the interference when the rotating shaft 24 is pulled out of the ball bearing 31.

In another embodiment, the shaft 24 and the ball bearing 31 are connected by a combination of interference fit and other connection methods. Specifically, please refer to Figs. 7 and 15. 05 includes:

051: Put the ball bearing 31 through the rotating shaft 24;

053: Install the rotating shaft 24 to the ball bearing 31 by interference fit and at least one of welding, gluing, and clamping.

Among them, the rotating shaft 24 is first inserted into the ball bearing 31, after the interference fit is adopted at the matching place of the rotating shaft 24 and the ball bearing 31, the rotating shaft 24 and the ball bearing are connected by any one or more of welding, gluing, and clamping. Reinforce the connection at 31.

Referring to FIG. 7 and FIG. 16, in some embodiments, the motor installation method further includes:

07: Sleeve the iron core 12 with the winding 13 on the end 118 of the base 11;

08: The end 118 is formed into the first limiting member 1181 and the second limiting member 1182 through the riveting process.

Among them, 07: the iron core 12 with the winding 13 is sleeved on the end 118 of the base 11, specifically: the central body 121 of the iron core 12 is sleeved on the end 118, and the lower surface of the central body 121 bears On the bottom surface of the recess 1183.

08: The end 118 is formed into the first limiting member 1181 and the second limiting member 1182 through the riveting process, specifically:

After the lower surface of the central body 121 is carried on the bottom surface of the notch 1183, the end portion 118 is then subjected to a squeezing riveting process, and the formed first limiting member 1181 can collide with the upper end surface 313 of the ball bearing 31, forming a second The two limiting members 1182 conflict with the central body 121 to prevent the iron core 12 from being separated from the end 118. At this time, even if the connection between the ball bearing 31 and the end portion 118 fails, the first limiting member 1181 can prevent the ball bearing 31 from being disengaged from the first sub-mounting hole 113, thereby improving the stability of the ball bearing 31 installation.

Referring to FIG. 7 and FIG. 17, in some embodiments, the motor installation method further includes:

09: The bearing sleeve 33 is sleeved on the outer side wall 323 of the oil-impregnated bearing 32 from the second end surface 112 and received in the second sub-mounting hole 114.

Wherein, 09 specifically means that when the bearing sleeve 33 is sleeved on the outer side wall 323 of the oil-impregnated bearing 32, when the top surface 3321 of the side wall 332 of the bearing sleeve 33 conflicts with the second stepped surface 117, it means that it is installed in place. After being installed in place, the outer side wall 323 of the oil-impregnated bearing 32 can be completely attached to the inner surface 3225 of the extension arm 3322. The arc-shaped attachment (spherical or ellipsoidal attachment) allows the oil-impregnated bearing 32 to fit in the receiving cavity. The 3320 can be easily rotated, so that the concentricity of the oil-impregnated bearing 32 and the ball bearing 31 can be easily adjusted. Then, glue is dispensed into the glue groove 3330 to fix the bearing sleeve 33 to the base 11 by gluing. Of course, while the bearing sleeve 33 is fixedly connected to the base 11 by gluing, at least one of the connection methods such as engagement and threaded connection can also be fixedly connected to the base 11; or, the bearing sleeve 33 can be fixedly connected to the base 11 through engagement and thread At least one of the connection methods is combined with gluing and installed on the base 11.

The motor installation method provided in this application utilizes a ball bearing 31 and a spherical or ellipsoidal oil-retaining bearing 32 to jointly support the rotation of the rotating shaft 24. On the one hand, the arrangement of the ball bearing 31 can reduce the resistance to the rotation of the rotating shaft 24 of the rotor 20. While ensuring the performance of the motor 100, the service life of the motor 100 can be prolonged; on the other hand, during the rotation of the shaft 24, the oil-impregnated bearing 32 can automatically adjust the concentricity with the ball bearing 31 to realize automatic centering and ensure the operation of the motor 100 The stability. Moreover, since the cost of the oil-impregnated bearing 32 itself is cheap, the cost of the entire motor 100 is also saved.

When the above-mentioned motor installation method is applied to the motor 200, the other implementation steps are basically the same, and the difference lies in 06 and 09.

Among them, 06: Install the oil-impregnated bearing 32 in the second sub-mounting hole 144 from the second end surface 142 and sleeve it on the rotating shaft 24, specifically:

The upper end of the outer side wall 323 of the oil-containing bearing 32 is completely attached to the inner surface of the second cavity 1442.

09: The bearing sleeve 34 is sleeved on the outer side wall 323 of the oil-impregnated bearing 32 from the second end surface 112 and received in the second sub-mounting hole 144, specifically: the bearing sleeve 34 is sleeved on the oil-impregnated bearing from the second end surface 112 During the process of the outer side wall 323 of the bearing 32, until the sleeve 341 and the elastic piece 342 both collide with the second stepped surface 147, it indicates that the installation is in place. At this time, the lower end of the outer side wall 323 of the oil-impregnated bearing 32 can be completely attached to the inner surface of the elastic piece 342.

Since the upper end of the outer side wall 323 of the oil-impregnated bearing 32 is completely attached to the inner surface of the second cavity 1442, and the lower end of the outer side wall 323 of the oil-impregnated bearing 32 is completely attached to the inner surface of the elastic piece 342, the arc-shaped attachment (spherical attachment) The oil-impregnated bearing 32 can be easily rotated in the limiting cavity 343 by the way of fitting or ellipsoidal attachment), so that the concentricity of the oil-impregnated bearing 32 and the ball bearing 31 can be easily adjusted.

In the description of this specification, reference to the description of the terms "certain embodiments", "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. means to incorporate the implementation The specific features, structures, materials, or characteristics described by the examples or examples are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine the different embodiments or examples and the features of the different embodiments or examples described in this specification without contradicting each other.

In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one feature. In the description of the present application, "a plurality of" means at least two, for example two, three, unless otherwise specifically defined.

Although the embodiments of the present application have been shown and described above, it can be understood that the above-mentioned embodiments are exemplary and should not be construed as limiting the present application. A person of ordinary skill in the art can comment on the foregoing within the scope of the present application. The embodiments are subject to changes, modifications, substitutions and modifications, and the scope of this application is defined by the claims and their equivalents.

Claims

A motor, characterized in that it comprises:

A stator, the stator includes a base, the base includes a first end surface and a second end surface opposite to each other, the base is provided with a mounting hole penetrating through the first end surface and the second end surface, and the mounting hole includes a through hole. A first sub-mounting hole on the first end surface and a second sub-mounting hole passing through the second end surface;

A rotor, the rotor includes a rotating shaft, and the rotating shaft penetrates the mounting hole; and

The bearing assembly includes a ball bearing and a spherical or ellipsoidal oil-impregnated bearing, the ball bearing is installed in the first sub-mounting hole, the oil-impregnated bearing is installed in the second sub-mounting hole, the The rotating shaft is provided with the ball bearing and the oil bearing, and the oil bearing and the ball bearing jointly support the rotation of the rotating shaft.
The motor according to claim 1, wherein the bearing assembly further comprises:

The bearing sleeve is installed and accommodated in the second sub-installation hole, and the bearing sleeve is sleeved on the outer side wall of the oil-impregnated bearing, and is used to provide a deformation space for the rotation of the oil-impregnated bearing.
The motor according to claim 2, wherein the oil-impregnated bearing can rotate in the bearing sleeve to adjust the concentricity with the ball bearing.
The motor according to claim 2, wherein the bearing sleeve is installed in the second sub-mounting hole by at least one of gluing, snapping, and threaded connection.
The motor according to claim 2, characterized in that:

The bearing sleeve is made of plastic material; or

The bearing sleeve is made of plastic and glass fiber materials; or

The bearing sleeve is made of elastic metal material.
The motor according to claim 2, wherein the bearing sleeve comprises:

Ring base; and

A side wall extending from a surface of the annular base, the side wall is provided with a plurality of notches in a direction from the top surface of the side wall to the surface, and an extension arm is formed between every two notches, A plurality of the extension arms enclose a containing cavity, and the oil-containing bearing is contained in the containing cavity.
7. The motor according to claim 6, wherein the inner surface of each extension arm is arc-shaped, so that the receiving cavity has a spherical shape to cooperate with the oil-impregnated bearing.
The motor according to claim 6, wherein the bearing sleeve further comprises:

A plurality of bumps, at least two bumps are provided on the outer surface of each extension arm, and a glue groove for accommodating glue is formed between each two bumps.
The motor according to claim 6, wherein the mounting hole further comprises a third sub-mounting hole located between the first sub-mounting hole and the second sub-mounting hole, the third sub-mounting hole The hole communicates with the first sub-mounting hole and the second sub-mounting hole; a first stepped surface is formed between the first sub-mounting hole and the third sub-mounting hole. The first step surface conflicts.
The motor according to claim 9, wherein a second stepped surface is formed between the second sub-mounting hole and the third sub-mounting hole, and the top surface of the side wall is connected to the second stepped surface. conflict.
The motor according to claim 2, wherein the bearing sleeve comprises:

A hollow annular sleeve; and

A plurality of elastic pieces extending from the inner wall of the sleeve, the plurality of elastic pieces are distributed around the center of the sleeve at intervals, and collectively enclose a limiting cavity, and the lower end of the oil-bearing bearing is accommodated in the limiting cavity Inside.
The motor according to claim 11, wherein the inner surface of each elastic piece close to the center of the sleeve is arc-shaped and matches the outer side wall of the oil-containing bearing.
The motor according to claim 12, wherein the mounting hole further comprises a third sub-mounting hole located between the first sub-mounting hole and the second sub-mounting hole, the third sub-mounting hole The hole communicates with the first sub-mounting hole and the second sub-mounting hole; a first stepped surface is formed between the first sub-mounting hole and the third sub-mounting hole. The first step surface conflicts.
The motor according to claim 13, wherein the second sub mounting hole includes a first cavity penetrating through the second end surface and a second cavity communicating with the first cavity, and the third sub mounting hole Hole communicates with the second cavity; a second stepped surface formed between the first cavity and the second cavity; the bearing sleeve is contained in the first cavity and the second cavity, the The sleeve and the elastic sheet all conflict with the second step surface, and the upper end of the oil-impregnated bearing is accommodated in the second cavity.
The motor according to claim 14, wherein:

In the direction from the first cavity to the third sub-mounting hole, the opening size of the cross section of the second cavity gradually decreases.
The motor according to claim 14, wherein the inner surface of the second cavity is arc-shaped and matches the upper end of the outer side wall of the oil-containing bearing.
The motor according to any one of claims 9-10 and 13-16, wherein the stator further comprises an iron core, and the iron core is sleeved on the end of the base where the ball bearing is installed , The end portion is formed by a pressure riveting process to form a first limiting member and a second limiting member, and the first limiting member extends into the first sub-mounting hole to prevent the ball bearing from separating from the first A sub-mounting hole, the second limiting member is located outside the first sub-mounting hole and is in contact with the iron core.
The motor according to claim 17, wherein the iron core includes a ring-shaped central body and a plurality of sheathing portions radiatingly extending from the outer peripheral surface of the central body; the stator further includes a plurality of sheathing parts. A plurality of windings corresponding to the part, each winding is sheathed on the corresponding sheathing part, and the second limiting member is in contact with the upper surface of the central body.
The motor according to claim 18, wherein the outer side surface of the end portion is provided with an annular recess, and the lower surface of the central body bears on the bottom surface of the recess.
The motor according to claim 18, wherein the rotor further comprises an end cover, and the end cover is fixedly connected to one end of the rotating shaft; the rotor further comprises:

A plurality of permanent magnets are installed on the inner wall of the end cap and opposite to the plurality of winding wires.
The motor according to claim 18, wherein the rotor further comprises a holder mounted on the inner wall of the end cover, and the holder comprises:

Cyclic matrix; and

There are a plurality of magnetic isolation arms extending from the annular base, a groove is formed between every two of the magnetic isolation arms, and each of the permanent magnets is arranged in one of the grooves.
The motor according to claim 21, wherein the polarities of the surfaces close to the inner wall of the end cover of the two adjacent permanent magnets are opposite.
The motor according to claim 1, wherein the rotating shaft and the ball bearing have an interference fit.
23. The motor according to claim 23, wherein the diameter of the joint of the rotating shaft and the ball bearing is larger than the diameter of the joint of the rotating shaft and the oil bearing.
23. The motor according to claim 23, wherein the diameter of the rotating shaft gradually decreases from where the rotating shaft and the ball bearing are fitted to where the rotating shaft and the oil-impregnated bearing are fitted.
The motor according to claim 23, wherein the interference between the rotating shaft and the ball bearing is between a preset maximum value and a preset minimum value; wherein the maximum value corresponds to the The interference between the rotating shaft and the ball bearing is locked to each other, and the minimum value corresponds to the interference when the rotating shaft is disengaged from the ball bearing.
The motor according to claim 23, wherein the rotating shaft is further installed in the ball bearing by at least one of welding, gluing, and clamping.
A power plant, characterized in that it comprises:

Executive parts; and

The motor according to any one of claims 1 to 27, wherein the execution part is connected to the motor, and the motor can drive the execution part to move.
The power plant according to claim 28, wherein the execution component comprises at least one of the following: a pan-tilt shaft arm and a propeller.
A movable platform, characterized in that it comprises:

Removable body; and

The power plant according to claim 28 or 29, which is provided on the movable body.
A method for installing a motor is characterized in that it includes:

A stator is provided, the stator includes a base, the base includes a first end surface and a second end surface opposite to each other, the base is provided with a mounting hole penetrating the first end surface and the second end surface, the mounting hole Including a first sub-mounting hole penetrating through the first end surface and a second sub-mounting hole penetrating through the second end surface;

Providing a rotor, the rotor including a rotating shaft; and

Provide a bearing assembly, which includes a ball bearing and an oil-impregnated bearing;

Installing the ball bearing in the first sub-mounting hole from the first end surface;

Pass the rotating shaft through the mounting hole and cooperate with the ball bearing;

The oil-impregnated bearing is installed in the second sub-mounting hole from the second end surface and sleeved on the rotating shaft, so that the oil-impregnated bearing and the ball bearing jointly support the rotation of the rotating shaft.
The motor mounting method according to claim 31, wherein the step of inserting the rotating shaft through the mounting hole and matching with the ball bearing comprises:

Pass the rotating shaft through the ball bearing; and

The rotating shaft is mounted on the ball bearing by means of interference fit.
The motor mounting method according to claim 31, wherein the step of inserting the rotating shaft through the mounting hole and matching with the ball bearing comprises:

Pass the rotating shaft through the ball bearing; and

The rotating shaft is mounted on the ball bearing through interference fit and at least one of welding, gluing, and clamping.
The motor installation method according to claim 31, wherein the stator further comprises an iron core and windings; the motor installation method further comprises:

Sleeve the iron core with the winding on the end of the base; and

The end portion is formed with a first limiting member and a second limiting member through a pressure riveting process, and the first limiting member is extended into the first sub-mounting hole to prevent the ball bearing from separating from the The first sub-mounting hole, and the second limiting member is located outside the first sub-mounting hole and abuts against the iron core.
The motor mounting method according to claim 31, further comprising: sheathing the bearing sleeve on the outer side wall of the oil-containing bearing from the second end surface and receiving it in the second sub-mounting hole.
The motor installation method according to claim 35, wherein the bearing sleeve is installed in the second sub-installation hole by at least one of gluing, snapping, and threaded connection.