Motor

Abstract

The utility model relates to a motor, the motor comprises a rotor assembly, the rotor assembly comprises a rotating shaft module and a rotor module, the rotating shaft module comprises a bearing, a rotating shaft and a shaft sleeve which are assembled together, the shaft sleeve is rotatably sleeved on the rotating shaft through the bearing, and the rotor module is arranged on the rotating shaft; the shaft sleeve comprises a stop part and a shaft sleeve main body for accommodating the bearing, and the rotor module is fixedly arranged on the rotating shaft; the stator assembly comprises a stator seat and a stator module matched with the rotor module, the stator seat is provided with an inserting hole and a limiting part and is used for fixedly arranging the stator module, and the inserting hole is used for inserting the rotating shaft module; the limiting part is used for being matched with the stopping part so as to limit the inserting depth of the shaft sleeve body relative to the inserting hole. According to the motor provided by the invention, the assembling difficulty of the rotor assembly and the stator assembly can be reduced, and the production efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of unmanned aerial vehicles, in particular, to an electric machine. BACKGROUND

[0002] The unmanned aerial vehicle power outer rotor brushless motor is a core component of the modern unmanned aerial vehicle power system, and its working principle is based on electromagnetic induction and commutation technology to realize high-efficiency power output without physical contact.

[0003] In the related art, the unmanned aerial vehicle power outer rotor brushless motor mainly includes a rotor assembly and a stator assembly, wherein the rotor assembly includes a rotor, an upper bearing, and a lower bearing, and the stator assembly includes a stator and a stator seat. The production process of the unmanned aerial vehicle power outer rotor brushless motor mainly includes the following steps: 1, the stator is put into the stator seat; 2, the upper bearing is put into the stator seat; 3, the rotor is put into the upper bearing; 4, the pre-tightening gasket is put into the stator seat; 5, the lower bearing is put into the stator seat; 6, the snap spring and the spring piece are installed. In the above process, when assembling the rotor assembly and the stator assembly, the upper bearing, the rotor, and the lower bearing in the rotor assembly need to be installed into the stator seat one by one, which makes the assembly of the rotor assembly and the stator assembly very cumbersome and seriously affects the production efficiency. CONTENT OF THE UTILITY MODEL

[0004] The purpose of the present disclosure is to provide an electric machine that can simplify the assembly process of the rotor assembly and the stator assembly and improve the production efficiency.

[0005] In order to achieve the above-mentioned purpose, the present disclosure provides an electric machine, comprising: a rotor assembly, the rotor assembly comprising a shaft module and a rotor module, the shaft module comprising a bearing, a shaft, and a shaft sleeve assembled together, the shaft sleeve being rotatably sleeved on the shaft through the bearing, the shaft sleeve comprising a stop portion and a shaft sleeve body for accommodating the bearing, the rotor module being fixedly arranged on the shaft; and a stator assembly, the stator assembly comprising a stator seat and a stator module cooperating with the rotor module, the stator seat being formed with an insertion hole and a limiting portion, and being used for fixedly arranging the stator module, the insertion hole being used for inserting the shaft module, and the limiting portion being used for cooperating with the stop portion to limit the insertion depth of the shaft sleeve body relative to the insertion hole.

[0006] Optionally, the stop portion is formed as an outwardly protruding flange structure of the shaft sleeve body, the limiting portion is formed by an end face of the insertion hole; and the insertion hole has an arc-shaped transition portion extending to the end face.

[0007] Optionally, the shaft sleeve body has a first end and a second end arranged oppositely in the axial direction, the first end is provided with the outer flange structure, and the second end is formed with an inner flange structure protruding inwardly from the shaft sleeve body for stopping the bearing.

[0008] Optionally, the insertion hole is configured as a cylindrical hole, and the shaft sleeve body is configured as a cylindrical barrel matched with the cylindrical hole.

[0009] Optionally, the stator base comprises a base body, the base body is formed with the insertion hole penetrating through the base body in the axial direction of the base body, the insertion hole has an insertion opening for inserting the rotating shaft module, and a first stop protrusion is arranged on one side of the base body near the insertion opening in the axial direction, the first stop protrusion has a stop end face.

[0010] Optionally, a plurality of first mounting holes penetrating through the base body in the axial direction of the base body are arranged on the side end face of the base body away from the first stop protrusion, the first mounting holes are arranged around the insertion hole, and the first mounting holes are used for fixed connection with a motor base for mounting the motor.

[0011] Optionally, a second stop protrusion protruding in the radial direction is formed on the outer periphery of the base body away from the first stop protrusion, the stator module comprises a stator core and a coil wound on the stator core, the stator core is sleeved on the outer periphery of the base body and is limited by the second stop protrusion.

[0012] Optionally, the rotor module comprises a rotor shell, the rotor shell is fixedly installed on the rotating shaft and located on one side of the bearing, the rotor shell comprises a shell body and a sleeve barrel arranged around the outer edge of the shell body, the shell body, the sleeve barrel and the shaft sleeve form a mounting space, the stator assembly is arranged in the mounting space, a permanent magnet is fixedly arranged on the inner side wall of the sleeve barrel, and the permanent magnet is used for magnetic induction cooperation with the stator module.

[0013] Optionally, a second mounting hole penetrating through the shell body in the axial direction of the shell body is arranged on the shell body, and the second mounting hole is used for mounting an actuator driven by the motor.

[0014] Optionally, the motor is a propeller motor for a drone, the rotor module is formed with a propeller mounting portion, and the stator base is formed with a drone mounting portion.

[0015] By the technical scheme, in the motor provided by the present disclosure, the bearing, the rotating shaft and the shaft sleeve are assembled together to form a rotating shaft module, so that the rotating shaft module and the rotor module can be installed together to form a rotor assembly during assembly, while the stator base and the stator module are assembled together to form a stator assembly, and then the rotor assembly and the stator assembly are assembled together, thereby realizing the assembly of the rotor assembly and the stator assembly in the motor.

[0016] In the motor provided by the present disclosure, the bearing, the rotating shaft and the shaft sleeve are assembled together to form a rotating shaft module, so that the rotating shaft module and the rotor module can be installed together to form a rotor assembly during assembly, while the stator base and the stator module are assembled together to form a stator assembly, and then the rotor assembly and the stator assembly are assembled together, thereby realizing the assembly of the rotor assembly and the stator assembly in the motor.

[0017] In the motor provided by the present disclosure, the bearing, the rotating shaft and the shaft sleeve are assembled together to form a rotating shaft module, so that the rotating shaft module and the rotor module can be installed together to form a rotor assembly during assembly, while the stator base and the stator module are assembled together to form a stator assembly, and then the rotor assembly and the stator assembly are assembled together, thereby realizing the assembly of the rotor assembly and the stator assembly in the motor.

[0018] Other features and advantages of the present disclosure will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0019] The accompanying drawings are included to provide a further understanding of the present disclosure and constitute a part of the specification, and are used together with the following specific embodiments to explain the present disclosure, but do not constitute a limitation on the present disclosure. In the drawings:

[0020] Figure 1 is a structural schematic diagram of the motor provided by the exemplary embodiment of the present disclosure;

[0021] Figure 2 is another structural schematic diagram of the motor provided by the exemplary embodiment of the present disclosure;

[0022] Figure 3 is a sectional view along A-A of Figure 2

[0023] Figure 4 is a structural schematic view of the rotating shaft module of Figure 3

[0024] Figure 5 is a structural schematic view of the stator seat provided by the exemplary embodiment of the present disclosure;

[0025] Figure 6 is another structural schematic view of the stator seat provided by the exemplary embodiment of the present disclosure;

[0026] Figure 7 is a sectional view along B-B of Figure 6

[0027] Explanation of Reference Signs

[0028] 1 - rotor assembly; 11 - rotating shaft module; 111 - bearing; 112 - rotating shaft; 113 - shaft sleeve; 1131 - shaft sleeve body; 1132 - stop; 11321 - outer flange structure; 1133 - inner flange structure; 12 - rotor module; 121 - rotor shell; 1211 - shell body; 12111 - propeller mounting portion; 12111a - second mounting hole; 1212 - outer sleeve; 1213 - permanent magnet; 2 - stator assembly; 21 - stator seat; 211 - seat body; 2111 - insertion hole; 21111 - insertion port; 21111a - arc-shaped transition portion; 2112 - limiting portion; 21121 - first stop protrusion; 2113 - unmanned aerial vehicle mounting portion; 21131 - first mounting hole; 2114 - second stop protrusion; 22 - stator module; 221 - stator core; 222 - coil. DETAILED DESCRIPTION

[0029] The specific embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely intended to illustrate and explain the present disclosure, and are not intended to limit the present disclosure.

[0030] In the present disclosure, the orientation words such as “inner” and “outer” used herein refer to “inner” and “outer” relative to the outline of the corresponding component itself, unless otherwise stated. In addition, the terms “first”, “second”, and the like used in the present disclosure are used to distinguish one element from another element, and do not have sequential and important meanings. In addition, in the following description, the same reference signs in different drawings represent the same or similar elements, unless otherwise explained. The above definitions are only used to explain and illustrate the present disclosure, and should not be understood as limiting the present disclosure.

[0031] The present disclosure provides an electric machine, referring to Figures 1 to 7 ​​​As shown in the figure, the motor comprises: a rotor assembly 1 comprising a shaft module 11 and a rotor module 12, the shaft module 11 comprising a bearing 111, a shaft 112 and a shaft sleeve 113 assembled together, the shaft sleeve 113 being rotatably sleeved on the shaft 112 through the bearing 111, the shaft sleeve 113 comprising a stop portion 1132 and a shaft sleeve body 1131 for accommodating the bearing 111, and the rotor module 12 being fixedly arranged on the shaft 112; and a stator assembly 2 comprising a stator base 21 and a stator module 22 cooperating with the rotor module 12, the stator base 21 being formed with an insertion hole 2111 and a limiting portion 2112 and being used for fixedly arranging the stator module 22, the insertion hole 2111 being used for inserting the shaft module 11, and the limiting portion 2112 being used for cooperating with the stop portion 1132 to limit the insertion depth of the shaft sleeve body 1131 relative to the insertion hole 2111.

[0032] Through the above technical solution, in the motor provided by the present disclosure, by assembling the bearing 111, the shaft 112 and the shaft sleeve 113 together to form the shaft module 11, it is realized that during assembly, the shaft module 11 and the rotor module 12 can be installed together to form the rotor assembly 1, at the same time, the stator base 21 and the stator module 22 are assembled together to form the stator assembly 2, and then the rotor assembly 1 and the stator assembly 2 are assembled together, thereby realizing the assembly of the rotor assembly 1 and the stator assembly 2 in the motor.

[0033] Among them, since the bearing 111, the shaft 112 and the shaft sleeve 113 are assembled together to form the shaft module 11 before the rotor assembly 1 and the stator assembly 2 are assembled, and the shaft module 11 and the rotor module 12 are assembled together to form the rotor assembly 1, and then the stator assembly 2 is directly assembled with the assembled rotor assembly 1 to form the motor, in this way, it can be avoided that the bearing 111 and the shaft 112 are directly assembled into the stator base 21 of the stator assembly 2 as single parts, and the bearing 111 is a precision part, the installation precision control requirement is very strict, therefore, the present disclosure forms the shaft module 11 first, then forms the rotor assembly 1, and then assembles the motor, so as to transfer the installation precision problem involved in the assembly process of the bearing 111 to the early stage of forming the shaft module 11, and avoid this problem in the later assembly process of the rotor assembly 1 and the stator assembly 2, therefore, the present disclosure can reduce the assembly difficulty of the rotor assembly 1 and the stator assembly 2, facilitate the installation of the rotor assembly 1 and the stator assembly 2, thereby improving the production efficiency.

[0034] The shaft sleeve 113 is arranged on one hand to provide bearing and mounting space for the bearing 111, and on the other hand to enable the shaft sleeve 113 to cooperate with the stator seat 21 as a whole part of the rotor assembly 1 when the rotor assembly 1 is assembled into the stator assembly 2. Specifically, the shaft sleeve body 1131 in the shaft sleeve 113 is inserted into the insertion hole 2111 of the stator seat 21, and at the same time, the stop portion 1132 in the shaft sleeve 113 cooperates with the limiting portion 2112 in the stator seat 21 to limit the insertion depth of the shaft sleeve body 1131 relative to the insertion hole 2111 in the stator seat 21, thereby limiting the installation position of the rotor assembly 1 relative to the stator assembly 2.

[0035] In the example embodiments provided in the present disclosure, the stop portion 1132 and the limiting portion 2112 can be configured in any suitable manner, which is not limited in the present disclosure. Alternatively, as shown in Figures 4 to 7 In the example embodiments provided in the present disclosure, the stop portion 1132 and the limiting portion 2112 can be configured in any suitable manner, which is not limited in the present disclosure. Alternatively, as shown in

[0036] In order to facilitate the assembly of the rotor assembly 1 and the stator assembly 2, the insertion hole 2111 can be provided with an arc-shaped transition portion 21111a extending to the end face, so that during installation, the rotor assembly 1 can be guided by the arc-shaped transition portion 21111a to facilitate the installation of the rotor assembly 1 into the stator assembly 2. The arc-shaped transition portion 21111a can be configured as a fillet between the end face and the insertion hole 2111, and the size of the fillet can be selected flexibly according to actual conditions, which is not limited in the present disclosure.

[0037] In the example embodiments provided in the present disclosure, the stop portion 1132 and the limiting portion 2112 can be configured in any suitable manner, which is not limited in the present disclosure. Alternatively, as shown in Figure 4As shown in FIG. 1, in order to realize the installation and support of the bearing 111, the sleeve body 1131 can be provided with relatively arranged first and second ends in the axial direction, the first end is provided with an outer flange structure 11321, and the second end is formed with an inner flange structure 1133 protruding inwardly from the sleeve body 1131, for stopping the installation of the bearing 111, so that when the bearing 111 is installed into the sleeve body 1131, the bearing 111 can be put into the sleeve body 1131 through the first end, and the bearing 111 is stopped and limited by the inner flange structure 1133 arranged at the second end, to avoid the bearing 111 from being pulled out of the second end of the sleeve body 1131. Here, by forming the inner flange structure 1133 protruding inwardly from the sleeve body 1131 at the second end, a circumferentially continuous annular structure can be formed on the inner side of the sleeve body 1131, so that the sleeve body 1131 can reliably stop the bearing 111.

[0038] Here, in order to adapt to the structure of the bearing 111, the insertion hole 2111 can be configured as a cylindrical hole, and the sleeve body 1131 can be configured as a cylindrical cylinder matched with the cylindrical hole.

[0039] In the example embodiments provided by the present disclosure, the stop portion 1132 can be configured in any suitable manner, which can be flexibly selected according to actual conditions, and the present disclosure does not limit this. Alternatively, referring to Figures 5 to 7 As shown in FIG. 1, the stator seat 21 can include a seat body 211, the seat body 211 is formed with an insertion hole 2111 penetrating along the axial direction thereof, the insertion hole 2111 has an insertion opening 21111 for inserting the shaft module 11, and a first stop protrusion 21121 is arranged on the side of the seat body 211 close to the insertion opening 21111 and protrudes in the axial direction, the first stop protrusion 21121 has a stop end face, so that the stop end face of the first stop protrusion 21121 serves as a limiting portion 2112, when the sleeve 113 of the rotor assembly 1 is inserted into the insertion hole 2111 of the stator seat 21 in the stator assembly 2 from the side of the insertion opening 21111, due to the action of the stop end face, the stop portion 1132 on the sleeve 113 will abut against the stop end face of the first stop protrusion 21121, thereby realizing the limiting of the insertion depth of the sleeve body 1131 relative to the insertion hole 2111.

[0040] In the example embodiments provided by the present disclosure, in order to realize the fixed installation of the motor, referring to Figure 6As shown in FIG, a plurality of first mounting holes 21131 extending axially through the end surface of the base body 211, which is located away from the first stop protrusion 21121, can be provided. These first mounting holes 21131 are arranged around the insertion hole 2111. The first mounting holes 21131 are used to securely connect to a motor base (not shown) on which the motor is mounted. Thus, when securing the motor, mounting holes corresponding to the first mounting holes 21131 can be opened on the motor base on which the motor is mounted. Fasteners (e.g., bolts and nuts) can then be inserted through the first mounting holes 21131 on the base body 211 and the corresponding mounting holes on the motor base and then secured securely. The number of first mounting holes 21131 can be flexibly selected based on practical needs and is not limited in this disclosure. For example, there can be four first mounting holes 21131, spaced apart around the insertion hole 2111.

[0041] In the exemplary embodiments provided in the present disclosure, reference is made to Figure 3 、 Figure 5 、 Figure 6 as well as Figure 7 As shown in, in order to realize the assembly of the stator module 22, a second stop protrusion 2114 protruding radially can be formed on the outer periphery of the seat body 211 away from the first stop protrusion 21121. The stator module 22 includes a stator core 221 and a coil 222 wound on the stator core 221. The stator core 221 is sleeved on the outer periphery of the seat body 211 and limited by the second stop protrusion 2114. In this way, due to the sleeve effect of the stator core 221 and the seat body 211 and the stopping effect of the second stop protrusion 2114 on the outer periphery of the seat body 211, the installation position of the stator core 221 on the seat body 211 can be limited, and the coil 222 is wound on the stator core 221, so that the installation position of the stator module 22 on the seat body 211 can be limited.

[0042] In the exemplary embodiments provided in the present disclosure, reference is made to Figure 3As shown in the figure, the rotor module 12 comprises a rotor shell 121 fixedly installed on the rotating shaft 112 and located at one side of the bearing 111, the rotor shell 121 comprises a shell body 1211 and a sleeve 1212 arranged around the outer edge of the shell body 1211, the shell body 1211, the sleeve 1212 and the shaft sleeve 113 form an installation space, the stator assembly 2 is arranged in the installation space, a permanent magnet 1213 is fixedly arranged on the inner side wall of the sleeve 1212, and the permanent magnet 1213 is used for magnetic induction cooperation with the stator module 22. Wherein, in order to realize the magnetic induction cooperation with the stator module 22 while reducing the weight, the shell body 1211 can be made of light materials such as aluminum, the sleeve 1212 can be made of iron materials, and the permanent magnet 1213 can be a permanent magnet, so that the weight of the whole structure is reduced, and the magnetic induction cooperation between the rotor module 12 and the stator module 22 is realized.

[0043] In the example embodiments provided by the present disclosure, reference is made to Figure 2 and Figure 3 As shown in the figure, in order to drive the actuator (not shown in the figure) by the motor, a second installation hole 12111a penetrating along the self-axis of the shell body 1211 can be arranged on the shell body 1211, and the second installation hole 12111a is used for installing the actuator driven by the motor. Wherein, in order to realize the installation of the actuator and the motor, another installation hole corresponding to the position of the second installation hole 12111a can be arranged on the actuator, and the fastener is locked and fixed through the second installation hole 12111a and the other installation hole, so as to realize the fixed connection between the actuator and the motor.

[0044] Wherein, the actuator can be any suitable actuator that can be driven by the motor, which can be flexibly selected according to the actual situation, and the present disclosure does not limit it. Alternatively, when the motor is a propeller motor for a drone, the actuator can be a propeller, at this time, the second installation hole 12111a formed on the shell body 1211 of the rotor module 12 can be used as a propeller mounting portion 12111, and the first installation hole 21131 formed on the seat body 211 of the stator seat 21 can be used as a drone mounting portion 2113, wherein the shell body 1211 is fixedly connected with the propeller through the propeller mounting portion 12111, and the stator seat 21 is fixedly connected with the motor seat for installing the motor through the drone mounting portion 2113.

[0045] The preferred embodiments of the present disclosure are described in detail above in combination with the drawings, but the present disclosure is not limited to the specific details in the above embodiments, and various simple modifications can be made to the technical solutions of the present disclosure within the technical concept of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

[0046] It should be further noted that various specific technical features described in the above specific embodiments can be combined in any suitable manner, and the disclosure will not be repeated here for various possible combinations.

[0047] In addition, various different embodiments of the disclosure can also be combined with each other as long as they do not contradict the idea of the disclosure, and they should also be considered as disclosed by the disclosure.

Claims

1. A motor, characterized in that: include: a rotor assembly, the rotor assembly comprising a shaft module and a rotor module, the shaft module comprising a bearing, a shaft, and a sleeve assembled together, the sleeve being rotatably sleeved on the shaft via the bearing, the sleeve comprising a stopper and a sleeve body for accommodating the bearing, the rotor module being fixedly disposed on the shaft; and The stator assembly includes a stator seat and a stator module that cooperates with the rotor module. The stator seat is formed with an insertion hole and a limit portion, and is used to fix the stator module. The insertion hole is used for inserting the rotating shaft module. The limit portion is used to cooperate with the stop portion to limit the insertion depth of the sleeve body relative to the insertion hole.

2. The motor according to claim 1, characterized in that The stopper is formed as an outer flange structure protruding outward from the sleeve body, and the limiting portion is formed by the end surface of the insertion hole; The insertion hole has an arc-shaped transition portion extending to the end surface.

3. The motor according to claim 2, characterized in that The sleeve body has a first end and a second end that are oppositely arranged in the axial direction, the first end is provided with the outer flange structure, and the second end is formed with an inner flange structure protruding inward from the sleeve body for stopping and installing the bearing.

4. The motor according to any one of claims 1 to 3, characterized in that The insertion hole is configured as a cylindrical hole, and the sleeve body is configured as a cylindrical tube adapted to the cylindrical hole.

5. The motor according to any one of claims 1 to 3, characterized in that: The stator seat includes a seat body, on which is formed the insertion hole which penetrates along its own axial direction, and the insertion hole has an insertion port for inserting the shaft module, and a first stop protrusion is axially protruded on one side of the seat body close to the insertion port, and the first stop protrusion has a stop end surface.

6. The motor according to claim 5, characterized in that The seat body is provided with a plurality of first mounting holes extending axially therethrough on one end face away from the first stop protrusion. The plurality of first mounting holes are arranged around the insertion hole, and the first mounting holes are used for fixed connection with the motor seat for mounting the motor.

7. The motor according to claim 5, characterized in that A second stop protrusion protruding radially is formed on the outer circumference of the seat body on one side away from the first stop protrusion. The stator module includes a stator core and a coil wound on the stator core. The stator core is sleeved on the outer circumferential surface of the seat body and is limited by the second stop protrusion.

8. The motor according to claim 7, characterized in that The rotor module includes a rotor housing, which is fixedly mounted on the rotating shaft and located on one side of the bearing. The rotor housing includes a shell body and an outer sleeve arranged around the outer edge of the shell body. The shell body, the outer sleeve and the sleeve form an installation space, and the stator assembly is arranged in the installation space. A permanent magnet is fixedly provided on the inner side wall of the outer sleeve, and the permanent magnet is used for magnetic induction cooperation with the stator module.

9. The motor according to claim 8, characterized in that The shell body is provided with a second mounting hole which penetrates along the axial direction of the shell body itself, and the second mounting hole is used for mounting an actuator driven by the motor.

10. The motor according to claim 1, characterized in that The motor is a propeller motor for a drone, a propeller mounting portion is formed on the rotor module, and a drone mounting portion is formed on the stator seat.

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