Disc motor

Abstract

The present application discloses a disc motor, comprising: a rotor disc; a stator disc, which is stacked with the rotor disc and has an air gap between the stator disc and the rotor disc; wherein the stator disc comprises a plurality of discrete stator teeth and a fixing frame for fixing the discrete stator teeth, and in a direction perpendicular to the rotor disc and the stator disc, the fixing frame does not overlap or overlaps slightly with the air gap. In the above-mentioned disc motor, when the fixing frame fixes the discrete stator teeth, the fixing frame will not enter or enter slightly into the air gap between the stator disc and the rotor disc, that is, in a direction perpendicular to the rotor disc and the stator disc, there is no overlapping part or very little overlapping part between the fixing frame and the air gap, so there is almost no situation where additional eddy current loss is generated due to the distribution of the fixing frame in the air gap, so that the working performance of the disc motor can be further improved.

Description

Technical Field

[0001] The present application relates to the technical field of motors, and in particular to a disc motor. Background Art

[0002] Disc motors are widely used in household appliances and industrial drive motors due to their flattened shape and high torque density. One of the difficulties in manufacturing disc motors is the design and processing of their stator discs, especially when the stator has discrete teeth, auxiliary structures are required for precise positioning of the stator teeth.

[0003] At present, the fixing parts of the stator disk used to fix and position multiple discrete stator teeth are generally fixed by being set on both sides of the discrete stator teeth. This will affect the working performance of the disc motor, such as generating additional eddy current losses, or low positioning accuracy, poor heat dissipation effect, etc. Summary of the invention

[0004] In view of this, the present application provides a disc motor, which can improve its working performance.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] A disc motor, comprising:

[0007] Rotor disc;

[0008] A stator disk, stacked with the rotor disk, with an air gap between the stator disk and the rotor disk;

[0009] in,

[0010] The stator disk includes a plurality of discrete stator teeth and a fixing frame for fixing the discrete stator teeth. In a direction perpendicular to the rotor disk and the stator disk, the fixing frame does not overlap or slightly overlaps with the air gap.

[0011] Optionally, in the above-mentioned disc motor, the fixing frame is a precision-machined metal frame.

[0012] Optionally, in the above disc motor, the plurality of discrete stator teeth are distributed circumferentially, and the fixing frame comprises:

[0013] An inner ring fixing frame, arranged on the inner side of the circumference and connected to all the discrete stator teeth;

[0014] An outer ring fixing frame is arranged outside the circumference and connected to all the discrete stator teeth;

[0015] in,

[0016] The inner ring fixing frame and the outer ring fixing frame are independently arranged and cooperate to fix all the discrete stator teeth.

[0017] Optionally, in the above-mentioned disc motor, positioning structures are provided on both the inner ring fixing frame and the outer ring fixing frame, and the positioning structures realize the positioning of the discrete stator teeth in the axial, radial and circumferential directions of the stator disc.

[0018] Optionally, in the above disc motor, the positioning structure includes:

[0019] A fixing groove, opening toward the discrete stator tooth and used for positioning the discrete stator tooth in the axial direction and the radial direction;

[0020] A fixed tooth is located at the opening of the fixed groove and protrudes toward the discrete stator tooth. The fixed tooth is used to position the discrete stator tooth in the circumferential direction.

[0021] Optionally, in the above-mentioned disc motor, the inner ring fixing frame and / or the outer ring fixing frame are formed by assembling a plurality of separate parts, and the plurality of separate parts are assembled along the axial direction or radial direction of the stator disc.

[0022] Optionally, in the above disc motor, the discrete stator teeth include:

[0023] The iron core has an axial positioning surface, a radial positioning surface and a circumferential positioning surface that cooperate with the fixing frame;

[0024] The coil is wound on the iron core and avoids the axial positioning surface, the radial positioning surface and the circumferential positioning surface.

[0025] Optionally, in the above-mentioned disc motor, the iron core is formed by laminating multiple layers of silicon wafers or by magnetic powder die-casting, and the axial positioning surface and the radial positioning surface are cutting surfaces of the corners of the iron core.

[0026] Optionally, in the above-mentioned disc motor, the discrete stator teeth are rectangular teeth or sector-shaped teeth.

[0027] Optionally, in the above-mentioned disc motor, the fixing frame is a non-metallic frame.

[0028] The disc motor provided in the present application uses a fixing frame to fix the discrete stator teeth, and when the fixing frame fixes the discrete stator teeth, the fixing frame will not enter the air gap between the stator disk and the rotor disk, or the amount of entry is very small, that is, in the direction perpendicular to the rotor disk and the stator disk, there is no overlapping part or only a small overlap between the fixing frame and the air gap, so there is almost no situation where additional eddy current loss is generated due to the distribution of the fixing frame in the air gap, so that the working performance of the disc motor can be further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present application or the technical solutions in 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 embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0030] Figure 1 An assembly diagram of a rotor disk, a stator disk and a rotating shaft of a disk-type motor provided by an embodiment of the present invention;

[0031] Figure 2 This is the assembly drawing of the stator disc;

[0032] Figure 3 This is an exploded view of the stator disc;

[0033] Figure 4 An exploded view of a stator disc of another structure;

[0034] Figure 5 An exploded view of a stator disc of another structure;

[0035] Figure 6 is a schematic diagram of the structure of discrete stator teeth;

[0036] Figure 7 It is a structural schematic diagram of the iron core;

[0037] Figure 8 A schematic diagram of the structure of a discrete stator tooth of another structure;

[0038] Fig. 9 A schematic diagram of the structure of an iron core of another structure.

[0039] exist Figure 1-Figure 9 middle:

[0040] 1- rotor disc, 2- stator disc, 3- rotating shaft;

[0041] 21-discrete stator teeth, 22-fixed frame;

[0042] 211-iron core, 212-coil, 221-inner ring fixing frame, 222-outer ring fixing frame;

[0043] 2111-axial positioning surface, 2112-radial positioning surface, 2113-circumferential positioning surface, 2211-inner ring groove, 2212-inner ring teeth, 2213-inner groove opening edge, 2214-inner ring side wall, 2215-third axial split, 2216-fourth axial split, 2217-inner ring bottom wall, 2221-outer ring groove, 2222-outer ring teeth, 2223-outer groove opening edge, 2224-outer ring side wall, 2225-first axial split, 2226-second axial split, 2227-first radial split, 2228-second radial split, 2229-outer ring bottom wall. DETAILED DESCRIPTION

[0044] The present application provides a disc motor, which can improve its working performance.

[0045] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0046] like Figure 1-Figure 9 As shown, the embodiment of the present application provides a disc motor, which mainly includes a rotor disc 1 and a stator disc 2. The rotor disc 1 is fixedly arranged on the rotating shaft 3 of the disc motor. The stator disc 2 and the rotor disc 1 are stacked, that is, the stator disc 2 and the rotor disc 1 are arranged perpendicular to the rotating shaft 3. At the same time, in order to ensure the normal operation of the stator disc 2 and the rotor disc 1, there is an air gap between the two. Among them, the stator disc 2 mainly includes a plurality of discrete stator teeth 21 and a fixing frame 22 for fixing these discrete stator teeth 21. The fixing frame 22 can fix a single discrete stator tooth 21 and can also keep different discrete stator teeth 21 in a fixed relative position. For example, multiple discrete stator teeth 21 are distributed in a circumferential manner; more importantly, while the fixing frame 22 fixes the discrete stator teeth 21, in the direction perpendicular to the rotor disk 1 and the stator disk 2, the fixing frame 22 does not overlap or only overlaps a small amount with the air gap, that is, in one case, the fixing frame 22 does not enter the air gap between the rotor disk 1 and the stator disk 2, and the fixing frame 22 is outside the main magnetic circuit of the disc motor; in another case, the fixing frame 22 extends into the air gap a small amount, that is, the fixing frame 22 and the air gap only overlap a small amount, and the value range of this "small amount" is not more than 5% of the radial size of the rotor disk 1. In this way, the fixing frame 22 and the rotor disk 1 can be made not to overlap in the axial direction or the overlapping area is very small, thereby avoiding the interference of the fixing frame 22 on the magnetic field, and no additional eddy current loss is caused, so that the working performance of the disc motor can be improved.

[0047] In the present application, the fixing frame 22 is further made into a metal frame that is finely machined. The reason why the fixing frame 22 made of metal is selected is that, under the premise that the fixing frame 22 does not enter the air gap or enters the air gap in small amounts, even if the fixing frame 22 is made of a metal material with magnetic conductivity, the disc motor can have no additional eddy current loss or only have a small additional eddy current loss, and will not affect the performance of the disc motor. In addition, the fixing frame 22 made of metal can be formed by fine machining, so that its machining accuracy is very high, so that it can better cooperate with the discrete stator teeth 21. Compared with the fixing frame 22 made of non-metallic material in the prior art by injection molding using auxiliary tools (such as molds) (the auxiliary tools need to be removed after the fixing frame 22 is formed, resulting in a margin between the fixing frame 22 and the discrete stator teeth 21, which may cause the discrete stator teeth 21 to be displaced), the fixing frame 22 made of metal can significantly improve the positioning accuracy of the discrete stator teeth 21.

[0048] In addition, since metal has good thermal conductivity, the use of a metal fixing frame 22 to fix the discrete stator teeth 21 can also improve the heat dissipation effect of the stator disk 2, and since metal has a greater structural strength than non-metal, the use of a metal fixing frame 22 can also improve the structural strength of the stator disk 2, so that the stator disk 2 can be directly connected to the housing or bearing of the disc motor, providing convenience for the assembly of the whole machine. At the same time, the metal fixing frame 22 is easy to process, so the processing cost can also be reduced.

[0049] When the fixing frame 22 is made of metal, in order to further improve the working performance of the disc motor and reduce the additional eddy current loss, the fixing frame 22 is preferably made of a metal material with low magnetic permeability and high resistivity, and further made of aluminum alloy or non-magnetic stainless steel.

[0050] Alternatively, the fixing frame 22 in the present application may also be a non-metallic frame, that is, the material of the fixing frame 22 may also be non-metallic, such as epoxy resin, plastic or ceramic, etc. The fixing frame 22 of this material can not only fix the discrete stator teeth 21, but also avoid the disc motor from generating excessive additional eddy current losses.

[0051] On the basis that the plurality of discrete stator teeth 21 are distributed circumferentially, the fixing frame 22 in the present application satisfies the premise that it is not distributed in the air gap or is distributed in a small amount. The specific structure of the fixing frame 22 can have multiple options. In an optional structure, for example Figure 2-Figure 5As shown, the fixing frame 22 includes: an inner ring fixing frame 221, which is arranged on the inner side of the circumference and connected to all the independent stator teeth 21; an outer ring fixing frame 222, which is arranged on the outer side of the circumference and connected to all the independent stator teeth 21; wherein, the inner ring fixing frame 221 and the outer ring fixing frame 222 are arranged independently of each other, and cooperate to realize the fixation of all the independent stator teeth 21. In this structure, the inner ring fixing frame 221 fixes the discrete stator teeth 21 on the inner side, and the outer ring fixing frame 222 fixes the discrete stator teeth 21 on the outer side, and all the discrete stator teeth 21 are fixed and connected by mutual cooperation, and the inner ring fixing frame 221 and the outer ring fixing frame 222 are connected through the discrete stator teeth 21, that is, there is no other connection structure of the fixing frame 22 between the two fixing frames 22 (that is, in the distribution area of ​​the discrete stator teeth 21). Since the air gap, the distribution area of ​​the rotor magnets and the rotation area of ​​the rotor magnets of the disc motor all overlap with the distribution area of ​​the discrete stator teeth 21 in the axial direction, the inner ring fixing frame 221 and the outer ring fixing frame 222 located outside the distribution area of ​​the discrete stator teeth 21 will not overlap with the air gap and the distribution area of ​​the rotor magnets and the rotation area of ​​the rotor magnets, thereby reducing or avoiding additional eddy current losses.

[0052] This type of fixing frame 22 that uses inner and outer double rings to simultaneously fix the discrete stator teeth 21 can improve the positioning accuracy and fixing firmness of the discrete stator teeth 21, so it is used as the preferred structure of the present application. In addition, the fixing frame 22 can also be other structures, such as a single-sided ring structure, that is, when the fixing requirements for the discrete stator teeth 21 are met, the fixing frame 22 can only have an inner ring fixing frame 221 or an outer ring fixing frame 222, etc.

[0053] Both the inner ring fixing frame 221 and the outer ring fixing frame 222 are provided with positioning structures, and the positioning structures realize the positioning of the discrete stator teeth 21 in the axial, radial and circumferential directions of the stator disk 2. In the prior art, considering the impact on the performance of the disc motor, the fixing frame 22 used to fix the discrete stator teeth 21 is generally made of non-metallic materials, and the fixing frame 22 is generally formed by injection molding and the positioning of the discrete stator teeth 21 is realized. Since an injection mold is required in the injection molding process, and the injection mold occupies a certain space, after the fixing frame 22 is formed and the injection mold is removed, the space originally occupied by the injection mold will form a gap between the discrete stator teeth 21 and the fixing frame 22, so that the discrete stator teeth 21 have a movable space, resulting in the injection molded fixing frame 22 being unable to accurately position the discrete stator teeth 21 in the direction perpendicular to the stator disk 2 (i.e., the axial direction). The metal fixing frame 22 in the present application can be processed into a positioning structure by fine machining. Since the precision of fine machining is very high, the processed positioning structure can be better matched with the discrete stator teeth 21, avoiding the existence of moving space, thereby significantly improving the positioning accuracy of the discrete stator teeth 21. In order to maximize the fixing effect of the discrete stator teeth 21, under the premise that the machining accuracy can be guaranteed, the present application allows the positioning structure to position the discrete stator teeth 21 in the axial, radial and circumferential directions, so as to achieve all-round positioning of the discrete stator teeth 21, so that the working performance and production quality of the disc motor are improved.

[0054] like Figure 3-Figure 5As shown, the positioning structure includes: a fixed groove, the opening of which is toward the discrete stator tooth 21, and is used to position the discrete stator tooth 21 in the axial and radial directions; a fixed tooth, which is located at the opening of the fixed groove and protrudes toward the discrete stator tooth 21, and the fixed tooth is used to position the discrete stator tooth 21 in the circumferential direction. Specifically, for the inner ring fixing frame 221, since the discrete stator tooth 21 is located outside thereof, the opening of the fixed groove (for the sake of distinction, the present application refers to the fixed groove provided on the inner ring fixing frame 221 as the inner ring groove 2211) is toward the radial outside thereof, the depth direction of the inner ring groove 2211 is the radial direction of the inner ring fixing frame 221, and the fixed tooth (for the sake of distinction, the present application refers to the fixed tooth provided on the inner ring fixing frame 221 as the inner ring tooth 2212) also protrudes radially outward at the opening of the inner ring groove 2211; for the outer ring fixing frame 222, since the discrete stator tooth 21 is located outside thereof, the fixed groove (for the sake of distinction, the present application refers to the fixed tooth provided on the inner ring fixing frame 221 as the inner ring tooth 2212) also protrudes radially outward at the opening of the inner ring groove 2211; 21 is located on the inner side thereof, so the opening of the fixed groove (for the sake of distinction, the fixed groove arranged on the outer ring fixing frame 222 is referred to as the outer ring groove 2221 in this application) is toward the radial inner side thereof, and the depth direction of the outer ring groove 2221 is the radial direction of the outer ring fixing frame 222, that is, the inner ring groove 2211 and the outer ring groove 2221 are two oppositely arranged grooves, and the fixed teeth (for the sake of distinction, the fixed teeth arranged on the outer ring fixing frame 222 is referred to as the outer ring teeth 2222 in this application) extend radially inward at the opening of the outer ring groove 2221, that is, the outer ring teeth 2222 and the inner ring teeth 2212 are arranged facing each other. During the assembly process, one end of the discrete stator tooth 21 is made to enter the inner ring groove 2211, and the inner groove opening edge 2213 of the inner ring groove 2211 abuts against the discrete stator tooth 21 to position the discrete stator tooth 21 in the radial direction of the stator disk 2, and the two inner ring side walls 2214 of the inner ring groove 2211 (the wall surface arranged along the radial direction of the inner ring fixing frame 221) clamp the discrete stator tooth 21 to position the discrete stator tooth 21 in the axial direction of the stator disk 2; the other end of the discrete stator tooth 21 enters the outer ring groove 2221, and the outer groove opening edge 2223 of the outer ring groove 2221 abuts against the discrete stator tooth 21 to position the discrete stator tooth 21 in the stator disk 2, the discrete stator tooth 21 is positioned in the radial direction of the stator disk 2 (that is, the opening edge of the outer ring groove 2221 and the opening edge of the inner ring groove 2211 cooperate to clamp the discrete stator tooth 21 in the radial direction), and the two outer ring side walls 2224 of the outer ring groove 2221 (the wall surface arranged along the radial direction of the outer ring fixing frame 222) clamp the discrete stator tooth 21 to position the discrete stator tooth 21 in the axial direction of the stator disk 2; at the same time, the two adjacent inner ring teeth 2212 and the two adjacent outer ring teeth 2222 will respectively clamp the two end portions of the same discrete stator tooth 21, thereby realizing the positioning of the discrete stator tooth 21 in the circumferential direction of the stator disk 2.

[0055] In the above structure, the specific structure of the fixing groove can be as follows Figure 3-Figure 5As shown, it is an annular groove arranged in the circumferential direction of the inner ring fixing frame 221 and the outer ring fixing frame 222; it can also be a plurality of rectangular grooves (the fixing grooves of this structure are not shown in the figure), each rectangular groove can only accommodate the end of a discrete stator tooth 21, and all the rectangular grooves are evenly distributed in the circumferential direction of the inner ring fixing frame 221 and the outer ring fixing frame 222 and correspond one-to-one to all the discrete stator teeth 21.

[0056] In this application, if Figure 3-Figure 5 As shown, the inner ring fixing frame 221 and / or the outer ring fixing frame 222 are formed by assembling a plurality of parts, and the plurality of parts are assembled along the axial direction and / or radial direction of the stator disk 2. The reason why the inner ring fixing frame 221 and / or the outer ring fixing frame 222 are formed by assembling a plurality of parts is mainly to facilitate the assembly of the fixing frame 22 and the discrete stator teeth 21. The specific arrangement method can be that one of the inner ring fixing frame 221 and the outer ring fixing frame 222 is formed by assembling a plurality of parts, and the other is an integral structure that does not need to be assembled; or both the inner ring fixing frame 221 and the outer ring fixing frame 222 are formed by assembling a plurality of parts. The splicing methods may include axial splicing and radial splicing. When one of the inner ring fixing frame 221 and the outer ring fixing frame 222 is spliced ​​and formed and the other does not need to be spliced, the one that needs to be spliced ​​may adopt an axial splicing method or a radial splicing method; when both the inner ring fixing frame 221 and the outer ring fixing frame 222 need to be spliced, the inner ring fixing frame 221 and the outer ring fixing frame 222 may both adopt an axial splicing method, or may both adopt a radial splicing method, or one of the inner ring fixing frame 221 and the outer ring fixing frame 222 may adopt an axial splicing method and the other may adopt a radial splicing method.

[0057] During specific assembly, Figure 3 As shown, when the inner ring fixing frame 221 is an integral structure and the outer ring fixing frame 222 adopts a structure in which two axial splits (i.e., a first axial split 2225 and a second axial split 2226) are axially spliced, the inner ring fixing frame 221 and the second axial split 2226 of the outer ring fixing frame 222 are firstly coaxially arranged, and then one end of the discrete stator tooth 21 is inserted into the inner ring groove 2211, and the other end is placed into the groove of the first axial split 2225 (this groove is a partial structure of the outer ring groove 2221, and the other partial structure of the outer ring groove 2221 is arranged on the second axial split 2226). When all the discrete stator teeth 21 are placed, the first axial split 2225 is axially moved to realize splicing with the second axial split 2226. At this time, the discrete stator tooth 21 is fixed between the inner ring fixing frame 221 and the outer ring fixing frame 222; as shown in FIG. Figure 4As shown, when the outer ring fixing frame 222 is an integral structure and the inner ring fixing frame 221 adopts a structure in which two axial splits (i.e., the third axial split 2215 and the fourth axial split 2216) are axially spliced, the outer ring fixing frame 222 and the third axial split 2215 of the inner ring fixing frame 221 are firstly arranged coaxially, and then one end of the discrete stator tooth 21 is inserted into the outer ring groove 2221, and the other end is placed into the groove of the third axial split 2215 (this groove is a partial structure of the inner ring groove 2211, and the other part of the structure of the inner ring groove 2211 is arranged on the fourth axial split 2216). When all the discrete stator teeth 21 are placed, the fourth axial split 2216 is axially moved to realize splicing with the third axial split 2215. At this time, the discrete stator tooth 21 is fixed between the inner ring fixing frame 221 and the outer ring fixing frame 222; as shown in FIG. Figure 5 As shown, when the inner ring fixing frame 221 is an integral structure and the outer ring fixing frame 222 is a structure in which two radially split parts (i.e., the first radial split part 2227 and the second radial split part 2228) are radially assembled, one end of all the discrete stator teeth 21 is first inserted into the inner ring groove 2211, and then the first radial split part 2227 is radially approached to the inner ring fixing frame 221, and in the process of approaching, the other end of the partially discrete stator teeth 21 corresponding to the first radial split part 2227 is inserted into the first radial split part 2228. 227, in the outer ring groove 2221, after the first radial split 2227 moves into place, the second radial split 2228 is radially approached to the inner ring fixing frame 221 from the opposite direction, and in the process of approaching, the other end of the partially separated stator tooth 21 corresponding to the second radial split 2228 is inserted into the outer ring groove 2221 of the second radial split 2228. As the second radial split 2228 moves into place, the second radial split 2228 is spliced ​​with the first radial split 2227.

[0058] Specifically, different parts can be connected by various structures, such as Figure 3-Figure 5 The plug-in structure shown, which is composed of an insert block and a slot and can be plugged into each other, may also be a clamping structure, a threaded connection structure, etc.

[0059] In addition, the inner ring fixing frame 221 and the outer ring fixing frame 222 can also be assembled with the discrete stator teeth 21 in other ways. For example, the inner ring fixing frame 221 is an elastic structure, which can increase its own diameter by expanding or restoring its original state from a contracted state to achieve assembly with the discrete stator teeth 21; the outer ring fixing member can reduce its own diameter by tightening or restoring its original state from an expanded state to achieve assembly with the discrete stator teeth 21.

[0060] like Figure 6 and Figure 8As shown, the discrete stator teeth 21 in the present application include: an iron core 211, having an axial positioning surface 2111, a radial positioning surface 2112 and a circumferential positioning surface 2113 that cooperate with the fixing frame 22; a coil 212, wound on the iron core 211, and avoiding the axial positioning surface 2111, the radial positioning surface 2112 and the circumferential positioning surface 2113. In order to improve the assembly accuracy with the above-mentioned fixed frame 22, an axial positioning surface 2111, a radial positioning surface 2112 and a circumferential positioning surface 2113 are specially arranged on the iron core 211, wherein the axial positioning surface 2111 is used to fit with the inner ring side wall 2214 or the outer ring side wall 2224 to achieve precise axial positioning, the radial positioning surface 2112 is used to fit with the inner slot opening edge 2213 and the outer slot opening edge 2223 to achieve precise radial positioning, and the two parallel circumferential positioning surfaces 2113 on each iron core 211 are used to fit with the two adjacent inner ring teeth 2212 or outer ring teeth 2222 located on both sides of each discrete stator tooth 21 to achieve precise circumferential positioning.

[0061] Furthermore, in order to further improve the fixing firmness of the discrete stator teeth 21, as Figure 6 and Figure 8 As shown, the top surface of the coil 212 is also flush with the axial positioning surface 2111, so that the fitting area between the discrete stator teeth 21 and the inner ring side wall 2214 and the outer ring side wall 2224 can be increased, making the axial positioning more precise.

[0062] Furthermore, the depth of the fixing groove can be made equal to the sum L of the widths of the axial positioning surface 2111 and the top surface of the coil 212. In this way, when one end of the discrete stator tooth 21 enters the inner ring groove 2211 or the outer ring groove 2221, not only the radial positioning surface 2112 abuts against the opening edge of the inner ring groove 2211 or the opening edge of the outer ring groove 2221, but also the side surface of the coil 212 also simultaneously fits against the inner ring bottom wall 2217 of the inner ring groove 2211 (the wall surface set along the axial direction of the inner ring fixing frame 221) or the outer ring bottom wall 2229 of the outer ring groove 2221 (the wall surface set along the axial direction of the outer ring fixing frame 222), thereby increasing the contact area between the discrete stator tooth 21 and the inner ring fixing frame 221 and the outer ring fixing frame 222, thereby making the radial positioning more precise.

[0063] The iron core 211 is formed by laminating multiple layers of silicon wafers or by magnetic powder die casting. The axial positioning surface 2111 and the radial positioning surface 2112 are the cutting surfaces of the corners of the iron core 211. Figure 7 or Fig. 9As shown. The core 211 can be formed by laminating multiple layers of silicon wafers, which has a mature process, low processing cost, and is easy to achieve mass production; or it can be formed by magnetic powder die casting. The axial positioning surface 2111 and the radial positioning surface 2112 can be formed by cutting the corners of the formed core 211, and the two planes with a 90-degree angle are the axial positioning surface 2111 and the radial positioning surface 2112. The circumferential positioning surface 2113 is a part of the side surface of the core.

[0064] The coil 212 can be formed by winding a round wire or a flat enameled wire around the side surfaces of the iron core 211 .

[0065] Specifically, the shape of the stator discrete teeth in the present application can be flexibly selected according to the magnetic circuit structure on the basis of setting the above-mentioned axial positioning surface 2111, radial positioning surface 2112 and circumferential positioning surface 2113, for example, it can be a rectangular tooth or a sector-shaped tooth.

[0066] The components and devices involved in this application are only illustrative examples and are not intended to require or imply that they must be connected, arranged, and configured in the manner shown in the drawings. As will be appreciated by those skilled in the art, these components and devices can be connected, arranged, and configured in any manner. Words such as "including", "comprising", "having", etc. are open words, meaning "including but not limited to", and can be used interchangeably with them. The words "or" and "and" used here refer to the words "and / or" and can be used interchangeably with them, unless the context clearly indicates otherwise. The word "such as" used here refers to the phrase "such as but not limited to", and can be used interchangeably with it.

[0067] It should also be noted that in the device of the present application, each component can be decomposed and / or reassembled, and these decompositions and / or reassemblies should be regarded as equivalent solutions of the present application.

[0068] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of the present application. Therefore, the present application is not intended to be limited to the aspects shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

[0069] The above description has been given for the purpose of illustration and description. In addition, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions and sub-combinations thereof.

[0070] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A disc motor, characterized in that: include: Rotor disc; A stator disk, stacked with the rotor disk, with an air gap between the stator disk and the rotor disk; in, The stator plate includes a plurality of discrete stator teeth and a fixing frame for fixing the discrete stator teeth, the plurality of discrete stator teeth are distributed in a circumference, the fixing frame includes an inner ring fixing frame and an outer ring fixing frame, the inner ring fixing frame is arranged on the inner side of the circumference and connected to all the discrete stator teeth, the outer ring fixing frame is arranged on the outer side of the circumference and connected to all the discrete stator teeth, the inner ring fixing frame and the outer ring fixing frame are arranged independently of each other, and cooperate to achieve the fixation of all the discrete stator teeth; The inner ring fixing frame and the outer ring fixing frame are both provided with a positioning structure, the positioning structure comprising a fixing groove and a fixing tooth, the fixing groove opening is toward the discrete stator tooth, and is used to position the discrete stator tooth in the axial direction and the radial direction, the fixing tooth is located at the opening of the fixing groove and is protruded toward the discrete stator tooth, and the fixing tooth is used to position the discrete stator tooth in the circumferential direction; In a direction perpendicular to the rotor disk and the stator disk, the fixing frame slightly overlaps with the air gap, and the overlapping range is less than or equal to 5% of the radial dimension of the rotor disk.

2. The disc motor according to claim 1, characterized in that: The fixing frame is a metal frame that is finely processed and formed.

3. The disc motor according to claim 1, characterized in that: The inner ring fixing frame and / or the outer ring fixing frame are formed by assembling a plurality of separate parts, and the plurality of separate parts are assembled along the axial direction or radial direction of the stator disk.

4. The disc motor according to claim 1, characterized in that: The discrete stator teeth include: The iron core has an axial positioning surface, a radial positioning surface and a circumferential positioning surface that cooperate with the fixing frame; The coil is wound on the iron core and avoids the axial positioning surface, the radial positioning surface and the circumferential positioning surface.

5. The disc motor according to claim 4, characterized in that: The iron core is formed by laminating multiple layers of silicon sheets or by magnetic powder die-casting, and the axial positioning surface and the radial positioning surface are cutting surfaces of the corners of the iron core.

6. The disc motor according to claim 1, characterized in that: The discrete stator teeth are rectangular teeth or sector-shaped teeth.

7. The disc motor according to claim 1, characterized in that: The fixing frame is a non-metal frame.

Images