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] This invention relates to the technical field of motor construction, and particularly to a flat motor. Background Technology

[0002] A flat motor is a compact type of motor. In terms of appearance, taking the output shaft as a reference, a flat motor has a larger radial dimension, while its axial dimension is smaller, thus making it easy to install and use in confined spaces.

[0003] Meanwhile, in practical applications, flat motors are required to generate large torque and power.

[0004] However, this causes the flat motor to generate a lot of heat, affecting its lifespan. Summary of the Invention

[0005] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes a flat motor that can improve heat dissipation, thereby increasing the torque and power of the flat motor to meet usage requirements, while reducing the impact on the lifespan of the flat motor.

[0006] According to an embodiment of the present invention, a flat motor includes a stator assembly and a rotor assembly located inside the stator assembly. The rotor assembly includes a rotor winding frame and a cooling fan located on one axial side of the rotor winding frame. The cooling fan includes a mounting ring, and a plurality of mounting portions are provided on one side of the mounting ring. The plurality of mounting portions are arranged circumferentially along the rotor winding frame and are inserted into the rotor winding frame. A plurality of fan blades are provided on the other side of the mounting ring and 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: This invention provides a rotor assembly that includes a cooling fan, thereby enabling the rotor assembly to dissipate heat. This allows for heat dissipation of both the rotor assembly and the stator assembly, reducing the internal temperature of the flat motor and minimizing or even eliminating high temperatures that could affect its lifespan. Furthermore, it allows the flat motor to operate continuously under high torque or high power conditions, meeting usage requirements.

[0008] This invention, by setting up a cooling fan that includes a mounting ring and avoids obstructing the rotor shaft, minimizes the modification or impact on other components of the flat motor and reduces the difficulty of implementation.

[0009] This invention simplifies the structure and reduces the difficulty of installation and layout by setting multiple mounting parts that can be plugged into the rotor winding frame. It also makes it convenient to install the cooling fan using the original gaps on the rotor winding frame.

[0010] This invention incorporates multiple fan blades, which rotate along with the rotor assembly when it rotates. This causes airflow around the rotor assembly, enhancing heat exchange and facilitating the removal of heat generated by the rotor and stator assemblies. Consequently, it reduces the temperature of the flat motor from within, lowering its maximum temperature and thus improving its operating environment, extending its service life, and enhancing its reliability.

[0011] According to an embodiment of the present invention, a flat motor is provided, wherein the fan blade includes a radial heat sink, one side of which is disposed near the center of the rotor assembly, and the other side of which is connected to the inner side and end face of the mounting ring.

[0012] The advantages of this invention are that by including radial heat sinks in the fan blades, radial airflow is also facilitated, allowing the airflow to pass through the end faces of the rotor and stator assemblies to achieve balanced heat dissipation, simultaneously reducing the temperature of the rotor and stator assemblies, and also reducing the amount of impurities in the airflow that are directed between the rotor and stator assemblies, thus preventing increased wear.

[0013] Furthermore, the airflow generated by the fan blades is easily perpendicular to the rotor and stator windings, which facilitates deep cooling of the coils and provides targeted protection for them. This greatly reduces the probability of coil failure and effectively extends the life of the flat motor.

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

[0015] The advantages of this invention are: by utilizing the side of the mounting groove away from the main body, it satisfies the need for installing the cooling fan while minimally affecting the shape of the rotor winding frame, requiring minimal modifications to the rotor winding frame and facilitating implementation. Furthermore, since the mounting part is located on the side of the mounting groove away from the main body, and the mounting groove has a relatively large circumferential dimension in the rotor assembly, it is also convenient to increase the specifications of the mounting part, improve installation strength, and prevent the mounting part from breaking and being damaged when the rotor winding frame drives the cooling fan to rotate.

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

[0017] The advantage of this invention is that by using an arc-shaped insert plate, the surface of the mounting part matches the inner surface of the mounting groove, reducing gaps and facilitating the rotation of the cooling fan.

[0018] Meanwhile, the width of the arc-shaped insert is greater than the opening gap between the two T-shaped cantilever sections, preventing the arc-shaped insert from coming out between the two T-shaped cantilever sections when rotating to start or stop, thus meeting the need to fix the cooling fan.

[0019] According to an embodiment of the present invention, a flat motor is provided, wherein the rotor assembly includes a left end cover and a right end cover, and the rotor winding frame is disposed 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. Both the left end cover and the right end cover are provided with a plurality of limiting cantilever portions in the circumferential direction, and the space between two adjacent limiting cantilever portions allows the mounting portion to pass through.

[0020] The advantages of this invention are that by placing the mounting ring of the cooling fan on the side of the left or right end cover away from the rotor winding frame, the arrangement of the cooling fan does not affect the increase or decrease of the rotor winding frame thickness, and it is also convenient to be applied to different models of flat motors, making it easy to promote and apply.

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

[0022] The advantage of this invention is that by placing the cooling fan on the side of the rotor winding frame close to the brush assembly, the cooling fan can dissipate heat from the brush assembly, improving the temperature rise caused by friction and other reasons at the brush assembly, and enabling the brush assembly to work continuously.

[0023] According to an embodiment of the present invention, a flat motor is provided, wherein the stator assembly includes a stator winding frame, the stator winding frame is annular, the outer diameter A of the stator winding frame is 110 to 140 mm, and the lamination thickness B of the stator winding frame is 10 to 20 mm.

[0024] The advantages are that by limiting the outer diameter A of the stator winding frame to 110 to 140 mm, the present invention can form a strong magnetic field, while also making the outer diameter of the flat motor moderate, the structure compact, and the space occupied small.

[0025] The present invention limits the lamination thickness B of the stator winding frame to 10 to 20 mm, so that the flat motor maintains its flat characteristics, while reducing the space occupied in the axial direction and facilitating the arrangement of the flat motor.

[0026] According to an embodiment of the present invention, a flat motor is provided, wherein the stator assembly includes a stator winding frame, the stator winding frame is annular, and one end of the stator winding frame has two opposing mounting points for mounting a brush assembly.

[0027] The advantages of this invention are: by installing brush assemblies on the stator winding frame, the number of parts in the flat motor can be reduced, and at the same time, it is easier to determine the relative gap between the brush assembly and the stator assembly, thus improving the installation accuracy.

[0028] According to an embodiment of the present invention, a flat motor has two opposing mounting points on one end face of the stator winding frame, the two mounting points being used to mount a mounting bracket for fixing the rotor shaft.

[0029] The advantage of this invention is that by installing a mounting bracket on the stator winding frame to fix the rotor shaft, it is also convenient to fix 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.

[0030] According to an embodiment of the present invention, a flat motor is provided, wherein the stator assembly includes a stator winding frame, the stator winding frame is annular, and the stator winding frame includes a stator ring and a plurality of stator winding portions located inside the stator ring.

[0031] The advantages of this invention are that by including a stator ring and a stator winding section in the stator winding frame, the winding requirements can be met, the outer shape of the stator winding frame can be simplified, processing can be reduced, and manufacturing costs can be lowered.

[0032] According to an embodiment of the present invention, a flat motor is provided, wherein the stator winding portion includes a winding arm connected to the stator ring and a semi-ring connected to one end of the winding arm away from the stator ring, wherein the inner side of the semi-ring matches the outer side of the rotor assembly.

[0033] The advantages of this invention are that by including a winding arm and a half-ring in the stator winding section, the coil can be arranged through the winding arm, and the magnetic field distribution can be improved by utilizing the half-ring, such as extending the magnetic field to the area between the two stator winding sections. As a result, the rotor assembly can cut the magnetic field at all positions, thereby generating a stable torque to meet the application requirements.

[0034] According to an embodiment of the present invention, a flat motor has two stator winding portions, which are arranged opposite to each other, and the free ends of the semi-rings of the two stator winding portions are arranged close to each other.

[0035] The advantages of this invention are that by setting two stator winding sections, the number of stator winding sections is reduced, the processing of the stator winding frame is reduced, and the manufacturing cost is lowered. At the same time, the space around the stator winding section is larger, which makes it easier to wind 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 high torque output.

[0036] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0037] To more clearly illustrate the technical solutions of the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 This is a schematic diagram of the structure of a flat motor according to an embodiment of the present invention; Figure 2 for Figure 1 Schematic diagram of the structure of the intermediate rotor assembly; Figure 3 for Figure 2 Assembly diagram of the rotor assembly; Figure 4 for Figure 1 A schematic diagram of the stator winding frame of the middle stator assembly.

[0039] Reference numerals: Stator assembly 100; Rotor assembly 110; Rotor winding frame 120; Cooling fan 130; Mounting ring 140; Mounting part 150; Fan blade 160; T-shaped cantilever part 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 part 270; Winding arm 280; Half ring 290; Side protrusion 300. Detailed Implementation

[0040] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0041] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0042] In the description of this invention, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" and "second" are mentioned, this is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0043] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation, connection, and linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0044] A flat motor according to an embodiment of the present invention is described below with reference to the accompanying drawings.

[0045] Reference Figures 1 to 4 The present invention aims to provide an embodiment of a flat motor. This flat motor improves heat dissipation, thereby increasing the torque and power of the flat motor to meet usage requirements, while simultaneously reducing the impact on the lifespan of the flat motor.

[0046] In this embodiment, the flat motor mainly includes a stator assembly 100, a rotor assembly 110, a brush assembly 210, and related accessories.

[0047] In this embodiment, the rotor assembly 110 is located inside the stator assembly 100. 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 small, while the radial dimension of the rotor assembly 110 and the stator assembly 100 is large. Therefore, the flat motor is flat in shape as a whole.

[0048] In this embodiment, the rotor assembly 110 includes a rotor shaft 240, a rotor winding frame 120 mounted on the rotor shaft 240, a left end cover 190, and a right end cover 200.

[0049] For rotor winding frame 120, multiple silicon steel sheets are punched and stacked together to form the required rotor winding frame. The shape of the silicon steel sheets punched and the number of silicon steel sheets stacked can be determined according to the usage requirements.

[0050] 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 identical on the drawings to reduce specifications and facilitate manufacturing. The left end cover 190 and the right end cover 200 can include an end cover portion and a bushing portion located in the end cover portion. The end cover portion fits into the rotor winding frame 120 to prevent the individual silicon steel sheets of the rotor winding frame 120 from being dispersed. The bushing portion can be interference-fitted 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.

[0051] In this embodiment, to address the problem of the flat motor overheating too quickly under high torque or high power operating conditions, affecting its use, the rotor assembly 110 further includes a cooling fan 130. 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. A plurality of mounting parts 150 are provided on one side of the mounting ring 140. The plurality of mounting parts 150 are arranged circumferentially along the rotor winding frame 120 and are inserted 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.

[0052] In summary, by configuring the rotor assembly 110, which includes a cooling fan 130, the present invention enables the rotor assembly 110 to have heat dissipation capabilities. Consequently, it can dissipate heat not only to the rotor assembly 110 but also to the stator assembly 100, thereby reducing the internal temperature of the flat motor, minimizing or even eliminating the generation of high temperatures, and preventing any impact on the lifespan of the flat motor. At the same time, it enables the flat motor to operate continuously under high torque or high power conditions, meeting the usage requirements.

[0053] The present invention, by setting up a cooling fan 130, including a mounting ring 140, and avoiding the rotor shaft 240, minimizes the modification or impact on other components of the flat motor and reduces the difficulty of implementation.

[0054] The present invention provides multiple mounting parts 150, which can be inserted into the rotor winding frame 120. It also makes it convenient to use the original gaps on the rotor winding frame 120 to install the cooling fan 130, which simplifies the structure and reduces the difficulty of installation and layout.

[0055] By arranging multiple fan blades 160, the present invention enables the multiple fan blades 160 to rotate along with the rotor assembly 110 when the rotor assembly 110 rotates. This drives the airflow around the rotor assembly 110, enhances heat exchange, and facilitates the removal of heat generated by the rotor assembly 110 and stator assembly 100. Consequently, the temperature of the flat motor is reduced from its interior, lowering the maximum temperature of the flat motor. This improves the operating environment of the flat motor, extends its service life, and enhances its reliability.

[0056] In some specific embodiments of the present invention, the mounting ring 140 can be bonded to the end cap portion of the left end cap 190 or the right end cap 200 to prevent the cooling fan 130 from falling off due to differences in the installation direction.

[0057] In some specific embodiments of the present invention, cooling fans 130 can be installed on both the left end cover 190 and the right end cover 200 to improve the heat dissipation capacity on both sides of the rotor assembly 110, so that the temperature distribution inside the flat motor is more balanced, thermal stress is reduced, and the flat motor runs more smoothly.

[0058] In some specific embodiments of the present invention, the fan blade 160 may include a radial heat sink, one side of which is disposed near the center of the rotor assembly 110, and the other side of which is connected to the inner side and end face of the mounting ring 140.

[0059] It is easy to understand that by including radial heat sinks in the fan blade 160, this embodiment also facilitates the generation of radial airflow, which allows the airflow to pass through the end faces of the rotor assembly 110 and the stator assembly 100 to achieve balanced heat dissipation, simultaneously reduce the temperature of the rotor assembly 110 and the stator assembly 100, and also reduces the amount of impurities in the airflow that are directed between the rotor assembly 110 and the stator assembly 100, thus preventing increased wear.

[0060] Furthermore, the airflow generated by the 160 fan blades is easily perpendicular to the rotor and stator windings, which facilitates deep cooling of the coils and provides targeted protection for them. This greatly reduces the probability of coil failure and effectively extends the life of the flat motor.

[0061] In some specific embodiments of the present invention, the radial heat sink may have a concave portion on the side near the rotor winding frame 120, the concave portion can avoid the rotor coil and not affect the arrangement of the rotor winding.

[0062] In some specific embodiments of the present invention, the radial heat sink can be a straight plate, which mainly generates radial airflow, facilitates convective heat transfer, and is easy to manufacture.

[0063] In some specific embodiments of the present invention, the radial heat sink can be inclined to generate axial airflow, which facilitates the airflow to enter the gap between the rotor assembly 110 and the stator assembly 100, further providing internal heat dissipation. However, it is necessary to consider filtering the air entering the flat motor to reduce impurities and wear.

[0064] Reference Figure 2 and Figure 3 In some specific embodiments of the present invention, the rotor winding frame 120 may include a body and a plurality of T-shaped cantilever portions 170 arranged circumferentially along the 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 body is used to accommodate a mounting portion 150.

[0065] It is easy to understand that this embodiment, by utilizing the side of the mounting groove 180 away from the main body, satisfies the need for installing the cooling fan 130 while minimally affecting the shape of the rotor winding frame 120. It requires minimal modification to the rotor winding frame 120 and is easy to implement. At the same time, the mounting part 150 is located on the side of the mounting groove 180 away from the main body. The mounting groove 180 has a large circumferential dimension in the rotor assembly 110, which makes it easy to increase the size of the mounting part 150, improve the installation strength, and prevent the mounting part 150 from breaking and being damaged when the rotor winding frame 120 drives the cooling fan 130 to rotate.

[0066] In some specific embodiments of the present invention, the mounting portion 150 may include an arc-shaped insert plate, the width of which is greater than the opening gap between the two T-shaped cantilever portions 170.

[0067] It is easy to understand that this embodiment uses an arc-shaped insert plate to make the surface of the mounting part 150 match the inner surface of the mounting groove 180, reducing gaps and facilitating the rotation of the cooling fan 130.

[0068] Meanwhile, the width of the arc-shaped insert plate is greater than the opening gap between the two T-shaped cantilever sections 170, preventing the arc-shaped insert plate from coming out between the two T-shaped cantilever sections 170 when rotating to start or stop, thus meeting the requirement of fixing the cooling fan 130.

[0069] In some specific embodiments of the present invention, the ratio of the mounting part 150 to the mounting slot 180 can be 1:2 or 1:3, etc., instead of the ratio of the mounting part 150 to the mounting slot 180 being 1:1, so as to reduce the number of mounting parts 150, reduce the installation difficulty, and have less impact on the arrangement of the rotor winding on the mounting slot 180.

[0070] 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. Both the left end cover 190 and the right end cover 200 are circumferentially arranged with multiple limiting cantilever portions, and the space between two adjacent limiting cantilever portions can allow the mounting portion 150 to pass through.

[0071] It is easy to understand that in this embodiment, by placing the mounting ring 140 of the cooling fan 130 on the side of the left end cover 190 or the right end cover 200 away from the rotor winding frame 120, 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 to be applied to different models of flat motors, making it easy to promote and apply.

[0072] In some specific embodiments of the present invention, the cooling fan 130 may be located on the side of the rotor winding frame 120 close to the brush assembly 210.

[0073] It is easy to understand that by placing the cooling fan 130 on the side of the rotor winding frame 120 close to the brush assembly 210, the cooling fan 130 can dissipate heat from the brush assembly 210, improve the temperature rise of the brush assembly 210 caused by friction and other reasons, and enable the brush assembly 210 to work continuously.

[0074] For the brush assembly 210, the brush assembly 210 includes a frame that connects to the stator assembly 100. The frame includes two legs and a cross plate that connects the two legs. The cross plate has a central hole that connects to and positions one end of the rotor shaft 240. The two legs connect to the stator assembly 100 to complete the fixation. At the same time, the two legs are equipped with brushes. The brushes elastically abut against slip rings that are fitted on the rotor shaft 240. The slip rings are composed of multiple annularly arranged conductive elements. Therefore, the brushes contact different conductive elements, causing the magnetic field on the rotor winding frame 120 to change continuously, which can cause the rotor assembly 110 to rotate.

[0075] Reference Figure 4 In some specific embodiments of the present invention, the stator assembly 100 may include a stator winding frame 250, which is annular and has two opposing mounting points 220 at one end for mounting the brush assembly 210.

[0076] It is easy to understand that by installing the brush assembly 210 on the stator winding frame 250, this embodiment can reduce the number of parts of the flat motor. At the same time, it is convenient to determine the relative gap between the brush assembly 210 and the stator assembly 100, thereby improving the installation accuracy.

[0077] In some specific embodiments of the present invention, one end face of the stator winding frame 250 may have two opposing mounting points 220, which are used to mount the mounting bracket 230 for fixing the rotor shaft 240.

[0078] It is easy to understand that by installing the mounting bracket 230 on the stator winding frame 250 to fix the rotor shaft 240, this embodiment also facilitates fixing 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, and the flat motor can operate stably.

[0079] In some specific embodiments of the present invention, screws can be used to penetrate the stator winding frame 250 and fix the mounting bracket 230 and the frame together, simplifying the installation.

[0080] In some specific embodiments of the present invention, the stator assembly 100 may include a stator winding frame 250, which is annular and includes a stator ring 260 and a plurality of stator winding portions 270 located inside the stator ring 260.

[0081] It is easy to understand that by including a stator ring 260 and a stator winding section 270 in the stator winding frame 250, this embodiment can not only meet the winding requirements, but also simplify the outer shape of the stator winding frame 250, reduce processing, and lower manufacturing costs.

[0082] In some specific embodiments of the invention, the outer diameter A of the stator winding frame 250 can be 110 to 140 mm, and the lamination thickness B of the stator winding frame 250 can be 10 to 20 mm.

[0083] It is easy to understand that by limiting the outer diameter A of the stator winding frame 250 to 110 to 140 mm, this embodiment can form a strong magnetic field, while also making the outer diameter of the flat motor moderate, the structure compact, and the space occupied small.

[0084] In this embodiment, by limiting the lamination thickness B of the stator winding frame 250 to 10 to 20 mm, the flat motor maintains its flat characteristics, while reducing the space occupied in the axial direction and facilitating the arrangement of the flat motor.

[0085] It should be noted that the outer diameter A in this embodiment refers to the minimum diameter surrounding and contacting the outer surface of the stator winding frame 250. It does not require the outer surface of the stator winding frame 250 to be a complete cylindrical surface; the outer surface of the stator winding frame 250 can be formed by connecting planes and arc surfaces, such as... Figure 4 As shown.

[0086] Meanwhile, the range boundaries of the outer diameter A and lamination thickness B in this embodiment may have errors due to manufacturing reasons. Therefore, even if the actual value of the stator winding frame 250 is outside the above range, as long as the actual value falls within the deviation or tolerance range of the boundary value, it should be considered to fall within the protection scope of this invention.

[0087] In some specific embodiments of the present invention, the tolerance range of the critical values ​​of the outer diameter A and the lamination thickness B can be ±0.2 to ±0.3 mm, which is within the tolerance range that can be controlled and achieved by existing manufacturing processes.

[0088] The tolerance requirement of ±0.2 to ±0.3 mm is a common unspecified tolerance requirement on drawings. Those skilled in the art will not consider its tolerance range to be too large, nor will they have any misunderstanding of the numerical range.

[0089] The above limits on the range of outer diameter A and lamination thickness B of stator winding frame 250 are based on the installation requirements of common small motors. When the space ratio for motor installation increases, the limits on the range of outer diameter A and lamination thickness B of stator winding frame 250 can be appropriately increased or decreased to meet actual layout needs.

[0090] In some specific embodiments of the present invention, the stator winding portion 270 may include a winding arm 280 connecting the stator ring 260 and a semi-ring 290 connecting the end of the winding arm 280 away from the stator ring 260, with the inner side of the semi-ring 290 matching the outer side of the rotor assembly 110.

[0091] It is easy to understand that by including a winding arm 280 and a semi-ring 290 in the stator winding section 270, the coil can be arranged through the winding arm 280, and the magnetic field distribution can be improved by utilizing the semi-ring 290, such as extending the magnetic field to the area between the two stator winding sections 270. As a result, the rotor assembly 110 can cut the magnetic field at various positions, thereby generating a stable torque to meet the usage requirements.

[0092] It is easy to understand that in this embodiment, there are two stator winding sections 270, which are arranged opposite to each other, and the free ends of the semi-rings 290 of the two stator winding sections 270 are arranged close to each other.

[0093] It is easy to understand that by setting two stator winding sections 270, this embodiment reduces the number of stator winding sections 270, reduces the processing of the stator winding frame 250, and lowers the manufacturing cost. At the same time, it also makes the space around the stator winding section 270 larger, which makes it easier to wind 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 high torque output.

[0094] Meanwhile, the fact that there are two stator winding sections 270 also allows the stator assembly 100 to maintain a smaller size in one of the two vertical directions, which can reduce the space occupied and facilitate installation.

[0095] Meanwhile, there are two stator winding sections 270. The space around the stator winding section 270 is large, and more coils can be wound in the stator winding section 270 to enhance the magnetic field, increase torque and power, and reduce the difficulty of coil winding.

[0096] In some specific embodiments of the present invention, the stator ring 260 may have a side protrusion 300 on the inner side, the side protrusion 300 being located between two half-rings 290 and being disposed close to the frame or mounting bracket 230, so as to improve the magnetic field distribution, make reasonable use of space, and at the same time increase the solid volume of the stator winding frame 250, which is beneficial to increasing strength.

[0097] In some specific embodiments of the present invention, the stator ring 260 may have multiple rectangularly arranged sides on its outer side to reduce the external size of the flat motor, reduce the space occupied, and facilitate the arrangement.

[0098] In the description of this specification, the references to terms such as "an embodiment, some embodiments, illustrative embodiments, example, specific example, or examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0099] The terms "first," "second," "third," "fourth," etc. (if applicable) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments described herein can be implemented in a sequence other than that illustrated or described herein.

[0100] It should also be noted that, in the description of this specification, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0101] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion, such that a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may also include other steps or units that are not explicitly listed or that are inherent to such processes, methods, products, or apparatus.

[0102] Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0103] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A flat motor, characterized in that, The device includes a stator assembly (100) and a rotor assembly (110) located inside the stator assembly (100). The rotor assembly (110) includes a rotor winding frame (120) and a cooling fan (130). 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). A plurality of mounting parts (150) are provided on one side of the mounting ring (140). The plurality of mounting parts (150) are arranged circumferentially along the rotor winding frame (120) and are inserted 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).

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

3. A flat motor according to claim 1, characterized in that, The rotor winding frame (120) includes a body and a plurality of T-shaped cantilever portions (170) arranged circumferentially along the 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 body is used to accommodate a mounting portion (150).

4. A flat motor according to claim 3, characterized in that, The mounting portion (150) includes an arc-shaped insert plate, the width of which is 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) includes a left end cover (190) and a right end cover (200). The rotor winding frame (120) is disposed between the left end cover (190) and the right end cover (200). The mounting ring (140) of the cooling fan (130) is located on the side of the left end cover (190) or the right end cover (200) facing away from the rotor winding frame (120). Both the left end cover (190) and the right end cover (200) are provided with multiple limiting cantilever portions in the circumferential direction. The space between two adjacent limiting cantilever portions allows the mounting portion (150) to pass through.

6. A flat motor according to claim 1, characterized in that, The flat motor also includes a brush assembly (210), and the cooling fan (130) is located on the side of the rotor winding frame (120) near the brush assembly (210); And / or, the stator assembly (100) includes a stator winding frame (250) which is annular, the outer diameter A of the stator winding frame (250) being 110 to 140 mm, and the lamination thickness B of the stator winding frame (250) being 10 to 20 mm.

7. A flat motor according to claim 1, characterized in that, The stator assembly (100) includes a stator winding frame (250) which is annular. One end of the stator winding frame (250) has two opposing mounting points (220) for mounting a brush assembly (210), and / or, one end of the stator winding frame (250) has two opposing mounting points (220) for mounting a mounting bracket (230) for fixing a rotor shaft (240).

8. A flat motor according to claim 1, characterized in that, The stator assembly (100) includes a stator winding frame (250), which is ring-shaped and includes 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 section (270) includes 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), the inner side of the half-ring (290) matching the outer side of the rotor assembly (110).

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

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