Flat motor

Abstract

A flat motor disclosed by the present invention comprises a stator assembly and a rotor assembly located at the inner side of the stator assembly, the rotor assembly comprises a rotor reel, the rotor assembly further comprises a heat dissipation fan, the heat dissipation fan is located at the axial side of the rotor reel, the heat dissipation fan comprises a mounting ring, and the mounting ring is located at the axial side of the rotor reel. One side of the mounting ring is provided with a plurality of mounting parts, the plurality of mounting parts are arranged in the circumferential direction of the rotor winding frame, the plurality of mounting parts are connected with the rotor winding frame in an inserted mode, the other side of the mounting ring is provided with a plurality of fan blades, and the plurality of fan blades are arranged in the circumferential direction of the rotor winding frame. According to the flat motor, the heat dissipation capability can be improved, so that the torque and the power of the flat motor are improved, the use requirement is met, and meanwhile, the influence on the service life of the flat motor is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of motor structure, and in particular to a flat motor. Background Art

[0002] The flat motor is a compact motor. In terms of appearance, based on the output shaft of the motor, the flat motor has a larger radial dimension, while the axial dimension of the flat motor is smaller, so it can be easily installed and used in a small space.

[0003] At the same time, in practical applications, flat motors are required to generate larger torque and power.

[0004] However, this causes the flat motor to generate a lot of heat, which affects the service life of the flat motor. Summary of the invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a flat motor that can improve the heat dissipation capacity so as to increase the torque and power of the flat motor to meet the use requirements, while reducing the impact on the life of the flat motor.

[0006] A flat motor according to an embodiment of the present invention comprises a stator assembly and a rotor assembly located inside the stator assembly, the rotor assembly comprises a rotor winding frame, the rotor assembly further comprises a cooling fan, the cooling fan is located on one axial side of the rotor winding frame, the cooling fan comprises a mounting ring, a plurality of mounting portions are arranged on one side of the mounting ring, the plurality of mounting portions are arranged circumferentially along the rotor winding frame, the plurality of mounting portions are plugged into the rotor winding frame, a plurality of fan blades are arranged on the other side of the mounting ring, the plurality of fan blades are arranged circumferentially along the rotor winding frame.

[0007] A flat motor according to an embodiment of the present invention has at least the following beneficial effects: The present invention provides a rotor assembly including a cooling fan, so that the rotor assembly has a heat dissipation capability, and further, can dissipate heat for both the rotor assembly and the stator assembly, so that the temperature inside the flat motor is reduced, and high temperature is reduced or even avoided, thereby avoiding affecting the life of the flat motor. At the same time, the flat motor can continue to work under a high torque or high power state to meet the use requirements.

[0008] The present invention arranges a heat dissipation fan, which includes a mounting ring and avoids the rotor shaft, thus causing little modification or impact on other components of the flat motor and reducing implementation difficulty.

[0009] The present invention provides a plurality of mounting parts so that the plurality of mounting parts are plugged into the rotor winding frame, and also facilitates the use of the original gap on the rotor winding frame to install the cooling fan, thereby simplifying the structure and reducing the difficulty of installation and arrangement.

[0010] The present invention is provided with a plurality of fan blades, so when the rotor assembly rotates, the plurality of fan blades can rotate accordingly, thereby driving the air flow around the rotor assembly, enhancing heat exchange, and conveniently taking away the heat generated by the rotor assembly and the stator assembly, thereby reducing the temperature of the flat motor from the inside of the flat motor and reducing the maximum temperature of the flat motor, thereby improving the operating environment of the flat motor, extending the service life of the flat motor, and improving the reliability of the flat motor.

[0011] According to a flat motor of an embodiment of the present invention, the fan blade includes a radial heat sink, one side of the radial heat sink is arranged close to the center of the rotor assembly, and the other side of the radial heat sink is connected to the inner side and the end surface of the mounting ring.

[0012] Advantageously, the present invention enables the fan blades to include radial heat sinks, thereby facilitating the generation of radial airflow, facilitating the airflow to pass through the end faces of the rotor assembly and the stator assembly to evenly dissipate heat, thereby simultaneously reducing the temperatures of the rotor assembly and the stator assembly, and also reducing the amount of impurities in the airflow being directed between the rotor assembly and the stator assembly, thereby preventing increased wear.

[0013] In addition, the airflow generated by the fan blades is easily perpendicular to the rotor winding and the stator winding, which is convenient for deep cooling of the coil and targeted protection of the coil. In turn, the probability of coil failure is greatly reduced, effectively extending the life of the flat motor.

[0014] According to a flat motor of an embodiment of the present invention, the rotor winding frame includes a main body and a plurality of T-shaped cantilever portions arranged along the circumference of the main body, the space between two adjacent T-shaped cantilever portions is used to form a mounting groove, the mounting groove is used to accommodate the rotor winding, and the side of the mounting groove away from the main body is used to accommodate one of the mounting portions.

[0015] The benefit is that: the present invention meets the need to install the cooling fan by utilizing the side of the installation groove away from the main body, and rarely affects the shape of the rotor winding frame, with little change to the rotor winding frame, and is easy to implement. At the same time, the installation part is located on the side of the installation groove away from the main body, and the circumferential dimension of the installation groove in the rotor assembly is relatively large. Therefore, it is also convenient to increase the specifications of the installation part, improve the installation strength, and avoid the installation part from breaking and being damaged when the rotor winding frame drives the cooling fan to rotate.

[0016] According to a flat motor of an embodiment of the present invention, the mounting portion comprises an arc-shaped plug plate, and the width of the arc-shaped plug plate is greater than the opening gap between the two T-shaped cantilever portions.

[0017] Advantageously, the present invention adopts an arc-shaped insert plate so that the surface of the mounting portion matches the inner surface of the mounting groove, thereby reducing the gap and facilitating the rotation of the heat dissipation fan.

[0018] At the same time, the width of the arc-shaped plug plate is greater than the opening gap between the two T-shaped cantilever parts, which prevents the arc-shaped plug plate from falling out from between the two T-shaped cantilever parts when the rotation is started or stopped, thereby meeting the need to fix the cooling fan.

[0019] According to a flat motor of an embodiment of the present invention, the rotor assembly includes a left end cover and a right end cover, the rotor winding frame is arranged between the left end cover and the right end cover, the mounting ring of the cooling fan is located on the side of the left end cover or the right end cover facing away from the rotor winding frame, and a plurality of limiting cantilever portions are arranged circumferentially of the left end cover and the right end cover, and the space between two adjacent limiting cantilever portions can allow the mounting portion to pass through.

[0020] Advantageously, the present invention arranges the mounting ring of the cooling fan on the left end cover or the right end cover away from the rotor winding frame. Therefore, the arrangement of the cooling fan does not affect the increase or decrease of the thickness of the rotor winding frame, and is also convenient for use in flat motors of different models, and is easy to promote and apply.

[0021] According to a flat motor of an embodiment of the present invention, the flat motor further includes a brush assembly, and the heat dissipation fan is located on a side of the rotor winding frame close to the brush assembly.

[0022] Advantageously, the present invention arranges the cooling fan on the side of the rotor winding frame close to the brush assembly, so that the cooling fan can dissipate heat from the brush assembly, thereby improving the temperature rise of the brush assembly due to friction and other reasons, so that the brush assembly can continue to work.

[0023] According to a flat motor of an embodiment of the present invention, the stator assembly includes a stator winding frame, the stator winding frame is ring-shaped, and one end surface of the stator winding frame has two opposite mounting points, and the two mounting points are used to install the brush assembly.

[0024] Advantageously, the present invention can reduce the number of components of the flat motor by installing the brush assembly on the stator winding frame, and at the same time, facilitate the determination of the relative gap between the brush assembly and the stator assembly, thereby improving the installation accuracy.

[0025] According to a flat motor of an embodiment of the present invention, one end surface of the stator winding frame has two opposite mounting points, and the two mounting points are used to install a mounting bracket for fixing the rotor shaft.

[0026] Advantageously, the present invention installs a mounting bracket for fixing the rotor shaft on the stator winding frame, thereby facilitating fixing the other end of the rotor shaft, so that the rotor shaft or output shaft of the flat motor is subjected to balanced force, and the flat motor can operate stably.

[0027] According to a flat motor of an embodiment of the present invention, the stator assembly includes a stator winding frame, the stator winding frame is ring-shaped, and the stator winding frame includes a stator ring and a plurality of stator winding parts located inside the stator ring.

[0028] Advantageously, the present invention can satisfy winding requirements and simplify the outer shape of the stator winding frame, thereby reducing processing and manufacturing costs by making the stator winding frame include a stator ring and a stator winding portion.

[0029] According to a flat motor of an embodiment of the present invention, the stator winding portion includes a winding arm connected to the stator ring and a half ring connected to one end of the winding arm away from the stator ring, and the inner side of the half ring matches the outer side of the rotor assembly.

[0030] Advantageously, the present invention makes the stator winding part include a winding arm and a half ring, so that the coil can be arranged through the winding arm and the half ring can be used to improve the magnetic field distribution, such as extending the magnetic field to the area between the two stator winding parts. As a result, the rotor assembly can cut the magnetic field at all positions, thereby generating a stable torque to meet the use requirements.

[0031] According to a flat motor of an embodiment of the present invention, the number of the stator winding parts is two, the two stator winding parts are arranged opposite to each other, and the free ends of the half rings of the two stator winding parts are arranged close to each other.

[0032] Advantageously, by providing two stator winding parts, the present invention reduces the number of stator winding parts, reduces the processing of the stator winding frame, and reduces the manufacturing cost. At the same time, it also makes the space around the stator winding part larger, which is convenient for winding thicker and more coils, so as to increase the magnetic field strength, thereby increasing the torque of the flat motor and meeting the needs of large torque output.

[0033] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0035] Figure 1 This is a schematic structural diagram of a flat motor according to an embodiment of the present invention; Figure 2 for Figure 1 A schematic diagram of the structure of the middle rotor assembly; Figure 3 for Figure 2 Assembly diagram of the rotor assembly; Figure 4 for Figure 1 Schematic diagram of the structure of the stator winding frame of the stator assembly.

[0036] Figure markings: stator assembly 100; rotor assembly 110; rotor winding frame 120; cooling fan 130; mounting ring 140; mounting portion 150; fan blade 160; T-shaped cantilever portion 170; mounting groove 180; left end cover 190; right end cover 200; brush assembly 210; mounting point 220; mounting bracket 230; rotor shaft 240; stator winding frame 250; stator ring 260; stator winding portion 270; winding arm 280; half ring 290; side protrusion 300. DETAILED DESCRIPTION

[0037] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0038] In the description of the present invention, it is necessary to understand that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0039] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number itself, and "above", "below", "within", etc. are understood to include the number itself. If there is a description of first and second, this is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0040] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation, connection and connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] A flat motor according to an embodiment of the present invention is described below with reference to the accompanying drawings.

[0042] Reference Figures 1 to 4 The present invention aims to provide an embodiment of a flat motor. A flat motor of the present invention can improve the heat dissipation capacity so as to increase the torque and power of the flat motor to meet the use requirements, and at the same time, reduce the impact on the life of the flat motor.

[0043] In this embodiment, the flat motor mainly includes a stator assembly 100, a rotor assembly 110, a brush assembly 210 and related accessories.

[0044] In this embodiment, the rotor assembly 110 is located on the inner side of the stator assembly 100, and the stator assembly 100 includes a rotor shaft 240, that is, an output shaft. With the axis of the output shaft as a reference, the axial length of the rotor assembly 110 and the stator assembly 100 is relatively small, while the radial dimensions of the rotor assembly 110 and the stator assembly 100 are relatively large, so that the flat motor is flat as a whole.

[0045] In this embodiment, the rotor assembly 110 includes a rotor shaft 240 , a rotor bobbin 120 mounted on the rotor shaft 240 , a left end cover 190 , and a right end cover 200 .

[0046] For the rotor winding frame 120 , a plurality of silicon steel sheets are punched and overlapped to form a required rotor winding frame. The shape of the punched silicon steel sheets and the number of stacked silicon steel sheets can be determined according to the use requirements.

[0047] As for the left end cover 190 and the right end cover 200, the left end cover 190 and the right end cover 200 can be completely consistent in the drawings to reduce specifications and facilitate production. The left end cover 190 and the right end cover 200 can include an end cover portion and a bushing portion located at the end cover portion. The end cover portion fits the rotor winding frame 120 to avoid the dispersion of the various silicon steel sheets of the rotor winding frame 120, and the bushing portion can be interference fit with the rotor shaft 240 to meet the needs of force transmission. At the same time, the bushing portion can also position the rotor assembly 110 to ensure that the relative position of the rotor assembly 110 and the stator assembly 100 is accurate, thereby improving the conversion efficiency of the flat motor.

[0048] In this embodiment, in order to solve the problem that the flat motor heats up too quickly when working in a high-torque or high-power state and affects its use, the rotor assembly 110 also includes a cooling fan 130, and the cooling fan 130 is located on one axial side of the rotor winding frame 120. The cooling fan 130 includes a mounting ring 140, and a plurality of mounting portions 150 are provided on one side of the mounting ring 140. The plurality of mounting portions 150 are arranged circumferentially along the rotor winding frame 120, and the plurality of mounting portions 150 are plugged into the rotor winding frame 120. A plurality of fan blades 160 are provided on the other side of the mounting ring 140. The plurality of fan blades 160 are arranged circumferentially along the rotor winding frame 120.

[0049] In summary, the present invention provides a rotor assembly 110 so that the rotor assembly 110 includes a cooling fan 130, thereby enabling the rotor assembly 110 to have heat dissipation capability, and further, heat can be dissipated from both the rotor assembly 110 and the stator assembly 100, thereby lowering the temperature inside the flat motor, reducing or even avoiding high temperatures, and avoiding affecting the life of the flat motor. At the same time, the flat motor can continue to work under high torque or high power conditions to meet usage requirements.

[0050] The present invention provides a heat dissipation fan 130, which includes a mounting ring 140, and avoids the rotor shaft 240, which has little modification or impact on other components of the flat motor, thereby reducing the difficulty of implementation.

[0051] The present invention provides a plurality of mounting portions 150 so that the plurality of mounting portions 150 are plugged into the rotor winding frame 120 , and also facilitates the use of the original gaps on the rotor winding frame 120 to install the cooling fan 130 , thereby simplifying the structure and reducing the difficulty of installation and arrangement.

[0052] The present invention is provided with a plurality of fan blades 160. Therefore, when the rotor assembly 110 rotates, the plurality of fan blades 160 can rotate accordingly, thereby driving the air flow around the rotor assembly 110, enhancing heat exchange, and conveniently taking away the heat generated by the rotor assembly 110 and the stator assembly 100, thereby reducing the temperature of the flat motor from the inside of the flat motor and reducing the maximum temperature of the flat motor, thereby improving the operating environment of the flat motor, extending the service life of the flat motor, and improving the reliability of the flat motor.

[0053] In some specific embodiments of the present invention, the mounting ring 140 may be bonded to the end cover portion of the left end cover 190 or the right end cover 200 to prevent the cooling fan 130 from falling off due to the difference in mounting directions.

[0054] In some specific embodiments of the present invention, both the left end cover 190 and the right end cover 200 may be installed with cooling fans 130 to improve the heat dissipation capacity on both sides of the rotor assembly 110, so as to make the temperature distribution in the flat motor more balanced, reduce thermal stress, and make the flat motor run more smoothly.

[0055] In some specific embodiments of the present invention, the fan blade 160 may include a radial heat sink, one side of the radial heat sink is arranged close to the center of the rotor assembly 110, and the other side of the radial heat sink is connected to the inner side and the end surface of the mounting ring 140.

[0056] It is easy to understand that the present embodiment enables the fan blades 160 to include radial heat sinks, thereby facilitating the generation of radial airflow, facilitating the airflow to pass through the end faces of the rotor assembly 110 and the stator assembly 100 to balance the heat dissipation, and simultaneously reducing the temperatures of the rotor assembly 110 and the stator assembly 100, and also less impurities in the airflow are introduced between the rotor assembly 110 and the stator assembly 100, thereby preventing increased wear.

[0057] Furthermore, the airflow generated by the fan blades 160 is easily perpendicular to the rotor windings and the stator windings, and is also convenient for deep cooling of the coils, thereby protecting the coils in a targeted manner, thereby greatly reducing the probability of coil failure and effectively extending the life of the flat motor.

[0058] In some specific embodiments of the present invention, the radial heat sink may have a concave portion on one side close to the rotor winding frame 120 , and the concave portion may avoid the rotor coil and does not affect the arrangement of the rotor winding.

[0059] In some specific embodiments of the present invention, the radial heat sink can be made into a straight plate, which mainly generates radial airflow, and generates airflow, which is convenient for convective heat exchange, and at the same time, the manufacturing difficulty is low.

[0060] In some specific embodiments of the present invention, the radial heat sink can be tilted to generate axial airflow, which facilitates the airflow to enter the gap between the rotor assembly 110 and the stator assembly 100, further providing an internal heat dissipation effect. However, it is necessary to consider filtering the air entering the flat motor to reduce impurities and reduce wear.

[0061] Reference Figure 2 and Figure 3 In some specific embodiments of the present invention, the rotor winding frame 120 can include a main body and a plurality of T-shaped cantilever portions 170 arranged along the circumference of the main body. The space between two adjacent T-shaped cantilever portions 170 is used to form a mounting groove 180. The mounting groove 180 is used to accommodate the rotor winding. The side of the mounting groove 180 away from the main body is used to accommodate a mounting portion 150.

[0062] It is easy to understand that this embodiment meets the need to install the cooling fan 130 by utilizing the side of the mounting groove 180 away from the main body, and rarely affects the shape of the rotor winding frame 120. There are few changes to the rotor winding frame 120, which is convenient for implementation. At the same time, the mounting portion 150 is located on the side of the mounting groove 180 away from the main body, and the circumferential dimension of the mounting groove 180 in the rotor assembly 110 is relatively large. Therefore, it is also convenient to increase the specifications of the mounting portion 150, improve the mounting strength, and avoid the mounting portion 150 from breaking and being damaged when the rotor winding frame 120 drives the cooling fan 130 to rotate.

[0063] In some specific embodiments of the present invention, the mounting portion 150 may include an arc-shaped insert plate, and the width of the arc-shaped insert plate is greater than the opening gap between the two T-shaped cantilever portions 170 .

[0064] It is easy to understand that, in this embodiment, by using an arc-shaped insert plate, the surface of the mounting portion 150 matches the inner surface of the mounting groove 180 , thereby reducing the gap and facilitating the rotation of the cooling fan 130 .

[0065] At the same time, the width of the arc-shaped insert plate is greater than the opening gap between the two T-shaped cantilever parts 170 , which prevents the arc-shaped insert plate from falling out from between the two T-shaped cantilever parts 170 when the rotation starts or stops, thereby meeting the need to fix the cooling fan 130 .

[0066] In some specific embodiments of the present invention, the ratio of the mounting portion 150 to the mounting slot 180 can be 1:2 or 1:3, etc., and there is no need for the ratio of the mounting portion 150 to the mounting slot 180 to be 1:1, so as to reduce the number of mounting portions 150, reduce the difficulty of installation, and have less impact on the arrangement of the rotor winding on the mounting slot 180.

[0067] In some specific embodiments of the present invention, the mounting ring 140 of the cooling fan 130 can be located on the side of the left end cover 190 or the right end cover 200 facing away from the rotor winding frame 120, and a plurality of limiting cantilever portions are arranged circumferentially of the left end cover 190 and the right end cover 200, and the space between two adjacent limiting cantilever portions can allow the mounting portion 150 to pass through.

[0068] It is easy to understand that in this embodiment, the mounting ring 140 of the cooling fan 130 is arranged on the left end cover 190 or the right end cover 200 away from the rotor winding frame 120. Therefore, the arrangement of the cooling fan 130 does not affect the increase or decrease of the thickness of the rotor winding frame 120, and is also convenient for use in flat motors of different models, and is easy to promote and apply.

[0069] In some specific embodiments of the present invention, the cooling fan 130 may be located on a side of the rotor winding frame 120 close to the brush assembly 210 .

[0070] It is easy to understand that in this embodiment, by arranging the cooling fan 130 on the side of the rotor winding frame 120 close to the brush assembly 210, the cooling fan 130 can also dissipate heat from the brush assembly 210, thereby improving the temperature rise of the brush assembly 210 caused by friction and other reasons, so that the brush assembly 210 can continue to work.

[0071] For the brush assembly 210, the brush assembly 210 includes a frame connected to the stator assembly 100, the frame includes two legs and a cross plate connecting the two legs, the cross plate is provided with a center hole, the center hole is connected and positions one end of the rotor shaft 240, and the two legs are connected to the stator assembly 100 to complete the fixation, and at the same time, the two legs are provided with brushes, the brushes elastically abut against the slip rings mounted on the rotor shaft 240, the slip rings are composed of a plurality of annularly arranged conductive parts, so that the brushes contact different conductive parts, so that the magnetic field on the rotor winding frame 120 changes continuously, which can make the rotor assembly 110 rotate.

[0072] Reference Figure 4 In some specific embodiments of the present invention, the stator assembly 100 may include a stator winding frame 250 , which is ring-shaped and has two opposite mounting points 220 at one end surface thereof, and the two mounting points 220 are used to mount the brush assembly 210 .

[0073] It is easy to understand that, by installing the brush assembly 210 on the stator winding frame 250, the present embodiment can reduce the number of components of the flat motor, and at the same time, facilitate the determination of the relative gap between the brush assembly 210 and the stator assembly 100, thereby improving the installation accuracy.

[0074] In some specific embodiments of the present invention, one end surface of the stator winding frame 250 may be provided with two opposite mounting points 220 , and the two mounting points 220 are used to mount a mounting bracket 230 for fixing the rotor shaft 240 .

[0075] It is easy to understand that in this embodiment, by installing the mounting bracket 230 for fixing the rotor shaft 240 on the stator winding frame 250, it is also convenient to fix the other end of the rotor shaft 240, so that the rotor shaft 240 or the output shaft of the flat motor is subjected to balanced force, so that the flat motor can operate stably.

[0076] In some specific embodiments of the present invention, screws may be used, which penetrate the stator winding frame 250 and fix the mounting bracket 230 and the frame together to simplify the installation.

[0077] In some specific embodiments of the present invention, the stator assembly 100 may include a stator winding frame 250 . The stator winding frame 250 is annular and includes a stator ring 260 and a plurality of stator winding portions 270 located inside the stator ring 260 .

[0078] It is easy to understand that, in this embodiment, by making the stator winding frame 250 include the stator ring 260 and the stator winding part 270, it can not only meet the winding requirements, but also simplify the outer shape of the stator winding frame 250, reduce processing, and reduce manufacturing costs.

[0079] In some specific embodiments of the present invention, the stator winding portion 270 may include a winding arm 280 connected to the stator ring 260 and a half ring 290 connected to the winding arm 280 away from one end of the stator ring 260 , and the inner side of the half ring 290 matches the outer side of the rotor assembly 110 .

[0080] It is easy to understand that in this embodiment, by making the stator winding part 270 include a winding arm 280 and a half ring 290, the coil can be arranged through the winding arm 280, and the half ring 290 can be used to improve the magnetic field distribution, such as extending the magnetic field to the area between the two stator winding parts 270. Therefore, the rotor assembly 110 can cut the magnetic field at various positions, thereby generating a stable torque to meet the use requirements.

[0081] It is easy to understand that in this embodiment, the number of the stator winding parts 270 is two, the two stator winding parts 270 are arranged opposite to each other, and the free ends of the half rings 290 of the two stator winding parts 270 are arranged close to each other.

[0082] It is easy to understand that, by providing two stator winding parts 270, the present embodiment reduces the number of stator winding parts 270, reduces the processing of the stator winding frame 250, and reduces the manufacturing cost. At the same time, it also makes the space around the stator winding part 270 larger, which is convenient for winding thicker and more coils, so as to increase the magnetic field strength, thereby increasing the torque of the flat motor and meeting the needs of large torque output.

[0083] At the same time, the number of the stator winding parts 270 is two, which also allows the stator assembly 100 to maintain a smaller size in one of the two vertical directions, thereby reducing the occupied space and facilitating installation.

[0084] At the same time, there are two stator winding parts 270, and the space around the stator winding parts 270 is relatively large. More coils can be wound on the stator winding parts 270 to enhance the magnetic field, thereby increasing the torque and power and reducing the difficulty of coil winding.

[0085] In some specific embodiments of the present invention, the inner side of the stator ring 260 may have a side protrusion 300, which is located between the two half rings 290 and is arranged close to the frame or mounting bracket 230 to improve the magnetic field distribution and rationally utilize the space. At the same time, the physical volume of the stator winding frame 250 is increased, which is beneficial to increase the strength.

[0086] In some specific embodiments of the present invention, the outer side of the stator ring 260 may have a plurality of side surfaces arranged in a rectangular shape, so as to reduce the outer dimensions of the flat motor, reduce the occupied space, and facilitate layout.

[0087] In the description of this specification, the description with reference to the terms "one embodiment, some embodiments, illustrative embodiments, examples, specific examples or some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0088] The terms "first, second, third, fourth", etc. (if any) in the specification and claims of this application and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments described herein can be implemented in an order other than that shown or described herein.

[0089] It should also be noted that in the description of this specification, relational terms such as first and second, etc. are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations.

[0090] In addition, the terms "comprises" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may also include other steps or units not explicitly listed or inherent to these processes, methods, products or apparatuses.

[0091] Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0092] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A flat motor, characterized in that: The invention comprises a stator assembly (100) and a rotor assembly (110) located inside the stator assembly (100), wherein the rotor assembly (110) comprises a rotor winding frame (120), and the rotor assembly (110) further comprises a heat dissipation fan (130), wherein the heat dissipation fan (130) is located on one axial side of the rotor winding frame (120), and the heat dissipation fan (130) comprises a mounting ring (140), wherein one side of the mounting ring (140) is provided with a plurality of mounting portions (150), wherein the plurality of mounting portions (150) are arranged along the circumference of the rotor winding frame (120), and the plurality of mounting portions (150) are plugged into the rotor winding frame (120), and the other side of the mounting ring (140) is provided with a plurality of fan blades (160), wherein the plurality of fan blades (160) are arranged along the circumference of the rotor winding frame (120).

2. A flat motor according to claim 1, characterized in that: The fan blade (160) comprises a radial heat sink, one side of which is arranged close to the center of the rotor assembly (110), and the other side of which is connected to the inner side and the end surface of the mounting ring (140).

3. A flat motor according to claim 1, characterized in that: The rotor winding frame (120) comprises a body, a plurality of T-shaped cantilever portions (170) arranged along the circumference of the body, the space between two adjacent T-shaped cantilever portions (170) being used to form a mounting groove (180), the mounting groove (180) being used to accommodate a rotor winding, and a side of the mounting groove (180) away from the body being used to accommodate a mounting portion (150).

4. A flat motor according to claim 3, characterized in that: The mounting portion (150) comprises an arc-shaped inserting plate, the width of the arc-shaped inserting plate being greater than the opening gap between the two T-shaped cantilever portions (170).

5. A flat motor according to claim 1, characterized in that: The rotor assembly (110) comprises a left end cover (190) and a right end cover (200), the rotor winding frame (120) being arranged between the left end cover (190) and the right end cover (200), the mounting ring (140) of the cooling fan (130) being located on the side of the left end cover (190) or the right end cover (200) facing away from the rotor winding frame (120), and a plurality of limiting cantilever parts are arranged in the circumference of the left end cover (190) and the right end cover (200), and the space between two adjacent limiting cantilever parts can allow the mounting part (150) to pass through.

6. A flat motor according to claim 1, characterized in that: The flat motor further comprises a brush assembly (210), and the heat dissipation fan (130) is located on a side of the rotor winding frame (120) close to the brush assembly (210).

7. A flat motor according to claim 1, characterized in that: The stator assembly (100) comprises a stator winding frame (250), the stator winding frame (250) is ring-shaped, one end surface of the stator winding frame (250) has two opposite mounting points (220), the two mounting points (220) are used to mount the brush assembly (210), and / or one end surface of the stator winding frame (250) has two opposite mounting points (220), the two mounting points (220) are used to mount a mounting bracket (230) that fixes the rotor shaft (240).

8. The flat motor according to claim 1, characterized in that: The stator assembly (100) comprises a stator winding frame (250), the stator winding frame (250) is ring-shaped, and the stator winding frame (250) comprises a stator ring (260) and a plurality of stator winding portions (270) located inside the stator ring (260).

9. A flat motor according to claim 8, characterized in that: The stator winding portion (270) comprises a winding arm (280) connected to the stator ring (260), and a half ring (290) connected to one end of the winding arm (280) away from the stator ring (260), wherein the inner side of the half ring (290) matches the outer side of the rotor assembly (110).

10. A flat motor according to claim 9, characterized in that: The number of the stator winding parts (270) is two, the two stator winding parts (270) are arranged opposite to each other, and the free ends of the half rings (290) of the two stator winding parts (270) are arranged close to each other.

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