Flat wire motor stator limiting device and limiting method

Abstract

The invention provides flat wire motor stator limiting equipment, and the equipment comprises a driving mechanism which comprises a rotating shaft and a nut which sleeves the rotating shaft and is in threaded fit connection with the rotating shaft; the stator tensioning mechanism comprises an outer tensioning structure and an inner pushing structure; the outer tensioning structure sleeves the rotating shaft and is used for tensioning the stator outwards; the inner pushing structure is arranged between the outer tensioning structure and the rotating shaft and is used for pushing the outer tensioning structure to expand outwards in the radial direction; and the stator limiting mechanism is detachably arranged on the stator tensioning mechanism and used for limiting the stator arranged on the outer tensioning structure in a sleeving manner. The limiting device has the advantages that the inner wall of the stator is tensioned from inside to outside, the contact area is greatly increased, traditional point contact is changed into surface contact, the inner wall of the stator is supported, deformation of the stator can be effectively prevented, shaking of the stator can be prevented, and the service life of the stator is prolonged. The stator can be stably fixed, the flat wire motor stator is prevented from being extruded and deformed, the labor cost is reduced, the production efficiency is improved, and the product quality is improved.

Description

Technical Field

[0001] The present invention belongs to the field of flat wire motor production and manufacturing, and relates to a flat wire motor stator limiting device and limiting method, in particular to a continuous wave winding flat wire motor stator limiting device and limiting method used in new energy vehicles. Background Art

[0002] With the technological advancement of electric vehicles, the power density of electric vehicle motors has also increased, requiring electric drive systems to move towards higher efficiency, lighter weight and lower cost. Due to the higher power density of flat wire motors, their application is becoming more and more extensive.

[0003] The flat wire motor includes a rotor and a flat wire stator. The flat wire stator includes an iron core and flat wire windings. Currently, there are multiple electric drive winding production modes in the flat wire motor manufacturing process. In the continuous wave winding electric drive production, there is an inner and outer stator assembly process. The inner and outer stator assembly process is used to press the inner stator with the completed flat wire winding and the preheated outer stator together along the stator feature points through equipment. The current equipment process uses tools to manually match the inner and outer stator feature slots, and then the pressure is set by the press and the inner stator is pressed down by the pressure head. In the above process, the flat wire stator needs to be clamped. Chinese patent CN 222200326 U discloses an adaptive chuck for the stator of a flat wire motor. The application drives the rack fixed on the connecting plate to make linear motion through a servo electric cylinder. The rack drives the outer gear rotation support outer gear ring to rotate. The outer gear rotation support outer gear ring drives the gear shaft to rotate at the same time. The gear shaft drives the toothed plates on the side walls of each claw to move at the same time, so that the claw moves linearly in the claw slot. The claw pressure block contacts and clamps the flat wire motor stator core to achieve the fixation of the flat wire motor stator. The claw is clamped on the outer wall of the stator and the clamping degree is adjusted by radial movement of the claw. Although the fixation of the flat wire motor stator can be achieved, the above-mentioned claw and the stator are not stable. The small contact area of ​​the outer wall makes the pressure in the area where the stator contacts the claws much greater than the pressure in the area where the stator does not contact the claws, which can easily cause the stator to be squeezed and deformed. In addition, the stator is prone to shaking during the entire clamping process, affecting the subsequent processing of the stator and thus affecting the quality of the product. Moreover, the above-mentioned device is mainly suitable for completely assembled flat wire stators, and cannot be fixed for stators that have not yet been assembled. If directly applied, it is easy to cause the stator to be squeezed and deformed, especially the internal flat wire motor stator winding to be squeezed and deformed, thereby reducing product quality and production efficiency.

[0004] Therefore, there is an urgent need for a flat wire motor stator limiting device that can accurately fix the stator during assembly, support the entire inner wall of the stator, prevent the internal flat wire motor stator from being squeezed and deformed, improve production efficiency, and improve product quality. Summary of the Invention

[0005] In view of the shortcomings of the prior art described above, the purpose of this application is to provide a flat wire motor stator limiting device and limiting method that can fix the stator during assembly, support the inner wall of the stator, prevent the flat wire motor stator from being squeezed and deformed, improve production efficiency, and improve product quality.

[0006] To solve the above problems, the technical solution adopted in this application is: The present invention provides a flat wire motor stator limiting device, comprising: The driving mechanism includes a rotating shaft and a nut sleeved on the rotating shaft and threadedly connected to the rotating shaft; The stator tensioning mechanism includes an outer tensioning structure sleeved on the outside of the rotating shaft for tensioning the stator outward, and an inner pushing structure arranged between the outer tensioning structure and the rotating shaft for pushing the outer tensioning structure to expand radially outward; and The stator limiting mechanism is detachably arranged on the stator tensioning mechanism and is used for limiting the stator sleeved on the external tensioning structure.

[0007] As a preferred embodiment of the present application, the inner pushing structure is fixedly sleeved on the outside of the rotating shaft, and includes an integrally formed pressure head and a conical cylinder, and the conical cylinder has an outer conical surface. The inner pushing structure switches between a first position and a second position under the drive of a driving mechanism. The first position is a contracted position in which the outer conical surface is disengaged from the outer tensioning structure, and the second position is a tensioning position in which the outer tensioning structure is in contact with and pressed against the outer conical surface and the inner wall of the stator at the same time.

[0008] As a preferred embodiment of the present application, the external tensioning structure includes an upper plate, a middle plate, and a lower plate which are sequentially sleeved on the outside of the rotating shaft from top to bottom, and the lower plate body includes a lower plate body which is sleeved on the outside of the rotating shaft and an annular enclosure which is arranged on the lower plate body and surrounds the outside of the rotating shaft, a chamber for accommodating the internal pushing structure is provided between the annular enclosure and the rotating shaft, and the outside of the annular enclosure is provided with an assembled tensioning part which moves radially along the annular enclosure for tightening the stator.

[0009] As a preferred embodiment of the present application, the mold upper plate includes an upper disc body, the center of which is provided with a through hole. The through hole and the inner push structure are clearance-matched to facilitate the inner push structure to move in and out along the central axis of the upper disc body.

[0010] As a preferred embodiment of the present application, the mold upper plate further includes a ring edge integrally formed on the bottom edge of the upper disc body and extending downward along the central axis of the upper disc body.

[0011] As a preference of the present application, the cross-section of the middle plate is L-shaped, and the middle plate and the annular edge together define a positioning groove for inserting the annular enclosure.

[0012] As a preferred embodiment of the present application, the annular enclosure is provided with at least two sockets for installing the assembled tensioning part at intervals along the circumferential direction.

[0013] As a preferred embodiment of the present application, the annular enclosure is provided with 2 to 4 sockets at equal intervals along the circumferential direction.

[0014] As a preferred embodiment of the present application, the annular enclosure is provided with four sockets for installing the assembled tensioning parts at equal intervals along the circumference.

[0015] As a preferred embodiment of the present application, the assembled tightening part is composed of at least two circumferential arc-shaped assembling blocks, and the arc-shaped assembling blocks are movably inserted in the socket; each of the arc-shaped assembling blocks has an outer expansion surface located outside the annular enclosure for fitting the inner wall of the stator and an inner push surface located in the cavity for adapting to the outer conical surface, the outer expansion surfaces of multiple arc-shaped assembling blocks are jointly assembled into an outer cylindrical surface for fitting the inner wall of the stator, and the inner push surfaces of multiple arc-shaped assembling blocks are jointly assembled into an inner conical surface.

[0016] As a preferred embodiment of the present application, the assembled tensioning portion is composed of 2 to 4 arc-shaped assembled blocks in the circumferential direction.

[0017] As a preferred embodiment of the present application, the assembled tensioning portion is composed of four circumferential arc-shaped assembled blocks.

[0018] As a preference of the present application, an annular limiting groove is provided on the upper portion of the external tensioning structure.

[0019] As a preferred embodiment of the present application, the annular edge and the annular enclosure jointly define an annular limiting groove.

[0020] As a preferred embodiment of the present application, the stator limiting mechanism is composed of at least two circumferential arc-shaped limiting ribs, and the arc-shaped limiting ribs can be detachably inserted into the limiting groove, and when the arc-shaped limiting ribs are inserted into the limiting groove, the outer surface of the arc-shaped limiting rib away from the rotating shaft protrudes from the outer surface of the assembled tensioning part.

[0021] As a preferred embodiment of the present application, the stator limiting mechanism is composed of two circumferential arc-shaped limiting ribs.

[0022] As a preferred embodiment of the present application, the upper portion of the rotating shaft is provided with an external thread for cooperating with a nut thread.

[0023] As a preference of the present application, the groove wall of the annular limiting groove for fitting with the arc-shaped limiting rib is an inclined plane.

[0024] As a preferred embodiment of the present application, the angle between the inclined plane and the horizontal plane is an acute angle. The inclined plane can serve as a guide surface to guide the arc-shaped limiting rib to smoothly fit into the annular limiting groove.

[0025] As a preference of the present application, the cross-section of the arc-shaped limit rib is composed of an isosceles trapezoidal portion and a rectangular portion, or is composed of an isosceles trapezoidal portion and a rectangular portion, the longer base of the isosceles trapezoidal / quasi-isosceles trapezoidal portion is connected to the rectangular portion, and the longer base has the same size as the connecting side of the rectangle; or the cross-section of all cell walls is composed of an isosceles triangular portion and a rectangular portion, or is composed of an isosceles triangular portion and a rectangular portion, the base of the isosceles triangle / quasi-isosceles triangle portion is connected to the rectangular portion, and the base has the same size as the connecting side of the rectangle.

[0026] As a preferred embodiment of the present application, the outer diameter of the mold lower plate is slightly larger than the inner diameter of the stator sleeved on the stator tensioning mechanism. The mold lower plate can cooperate with the stator limiting mechanism to initially limit the stator.

[0027] As a preference of the present application, the bottom of the rotating shaft is provided with a radial blocking surface for supporting the bottom of the stator tensioning mechanism.

[0028] As a preferred embodiment of the present application, the bottom surface of the mold lower plate is provided with a groove that aligns with the radial blocking surface. During assembly, the mold lower plate is fitted over the exterior of the rotating shaft, and the radial blocking surface abuts against the bottom of the groove, thereby supporting the mold lower plate without hindering relative rotation between the rotating shaft and the mold lower plate.

[0029] As a preferred embodiment of the present application, a reset device is connected between each of the arcuate assembly blocks and the tapered cylinder of the inner push structure. When the inner push structure is in the first position (i.e., the outer conical surface is disengaged from the inner push surface), the reset device can drive the arcuate assembly blocks to move radially inward until the side edges of the inner push surfaces of the arcuate assembly blocks abut against each other.

[0030] As a preferred embodiment of the present application, the reset device is a pull rope or a reset spring. When reset is required, the reset device pulls the arc-shaped assembly block radially inward to reset the arc-shaped assembly block in time without manual operation.

[0031] As a preferred embodiment of the present application, the arc-shaped assembly block is equipped with at least one pressure detection sensor, which is arranged on the outer expansion surface and / or the inner push surface to facilitate the detection of the pressure between the outer tensioning structure and the outer conical surface and the stator.

[0032] As a preferred embodiment of the present application, each arc-shaped assembly block is equipped with two sets of pressure detection sensors, one on the outer expansion surface and the other on the inner thrust surface. The pressure detection sensors promptly detect the pressure between the outer tensioning structure, the outer conical surface, and the stator, facilitating control of the pressure between the outer tensioning structure and the stator, and also promptly monitoring whether the stator is deformed.

[0033] The present invention also provides a limiting method, comprising the following steps: Step 1: Preliminarily insert the arc-shaped assembly blocks of the external tensioning structure on the lower plate of the mold, and keep the inner push surface and the outer expansion surface of each arc-shaped assembly block located on the inner and outer sides of the annular enclosure respectively; Step 2: Install the mold middle plate, mold upper plate, and inner push structure on the rotating shaft in sequence, adjust the arc-shaped assembly blocks of the outer tensioning structure to the first position, and complete the preliminary assembly of the flat wire motor stator limit device; Step 3: Sleeve the stator onto the exterior of the preliminarily assembled flat wire motor stator limiting device, insert each arc-shaped limiting rib of the stator limiting mechanism into the annular limiting groove at the bottom of the mold upper plate, and limit the stator through the mold lower plate and the stator limiting mechanism; Step 4. Turn the nut to drive the shaft to rotate. While the shaft rotates, it drives the inner push structure to move downward. When the outer conical surface of the inner push structure moves downward, it pushes the various arc-shaped assembly blocks of the assembled tensioning part to expand radially outward until the outward expansion surfaces of each arc-shaped assembly block contact and press the inner wall of the stator. At this time, the various arc-shaped assembly blocks of the outer tensioning structure are in the second position, completing the limit between the stator and the stator limit device of the flat wire motor.

[0034] Compared with the prior art, the present invention has the following advantages: 1. The limit device of the present application tightens the inner wall of the stator from the inside out, greatly increasing the contact area and changing from traditional point contact to surface contact. This can effectively prevent the stator from deformation and shaking, thereby ensuring the quality of the stator. 2. This application designs a stator tensioning mechanism. The cone of the stator tensioning mechanism is moved by a rotating shaft and a nut in threaded engagement, so that the cone surface cooperates with the arc-shaped assembly block to tighten the stator. This allows for rapid stator tensioning and limiting without causing the internal flat wire motor stator winding to be squeezed and deformed, thereby improving product quality. 3. The limit device of this application adopts split technology and combines it with tensioning technology to achieve stator fixation, simple operation, precise positioning, reduce production costs and improve production efficiency; 4. The limiting device of the present application is provided with a stator limiting mechanism, which performs preliminary limiting on the stator through the mold lower plate and the stator limiting mechanism to prevent the stator position from shifting during the tightening process and ensure the installation position of the product. After the work is completed, the production line tooling is clamped manually or by a transfer structure to enter the downstream process and cooperate with the downstream process for motor production; 5. The stator limiting mechanism of the present application is composed of a plurality of arc-shaped limiting ribs, and the inner side of the cross section of the arc-shaped limiting ribs and the groove wall of the annular limiting groove are inclined planes, which can facilitate the insertion of the arc-shaped limiting ribs; 6. The use of the limiting device of this application as a production medium reduces direct manual contact with the stator product, improves the overall layout, increases production efficiency, reduces labor costs, and improves product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a structural diagram of a flat wire motor stator limiting device according to an embodiment of the present invention.

[0036] Figure 2 This is a front view of a stator limiting device for a flat wire motor according to an embodiment of the present invention.

[0037] Figure 3 This is a left side view of a stator limiting device for a flat wire motor according to an embodiment of the present invention.

[0038] Figure 4 This is a top view of a stator limiting device for a flat wire motor according to an embodiment of the present invention.

[0039] Figure 5 This is a cross-sectional view of a stator limiting device for a flat wire motor according to an embodiment of the present invention.

[0040] Figure 6 for Figure 5 One of the partial enlarged views shows the installation diagram of the mold upper plate and the mold middle plate.

[0041] Figure 7 for Figure 5 The second partial enlarged view shows the position installation diagram between the outer tensioning structure and the inner pushing structure. In the attached figure:

[0042] 1-driving mechanism; 11-rotating shaft; 111-radial blocking surface; 12-nut; 2- stator tensioning mechanism; 21- external tensioning structure; 211- mold upper plate; 2111- mold upper plate body; 2112- ring edge; 212- mold middle plate; 213- mold lower plate; 214- mold lower plate body; 215- annular enclosure; 216- assembled tensioning part; 2161- arc-shaped assembly block; 2162- outer expansion surface; 2163- inner push surface; 217- annular limiting groove; 22- inner push structure; 221- pressure head; 222- conical cylinder; 3-Stator limiting mechanism. DETAILED DESCRIPTION

[0043] The following describes the embodiments of the present application through specific examples. Those skilled in the art will readily understand the other advantages and benefits of the present application from the disclosure herein. The present application may also be implemented or applied through various other specific embodiments, and the details in this specification may be modified or altered based on different viewpoints and applications without departing from the spirit of the present application.

[0044] It should be noted that the process equipment or devices not specifically specified in the following embodiments are all conventional equipment or devices in the art.

[0045] In addition, it should be understood that one or more method steps mentioned in this application do not exclude the presence of other method steps before or after the combination step or the insertion of other method steps between these explicitly mentioned steps, unless otherwise specified; it should also be understood that the combination connection relationship between one or more devices / apparatuses mentioned in this application does not exclude the presence of other devices / apparatuses before or after the combination device / apparatus or the insertion of other devices / apparatuses between these two explicitly mentioned devices / apparatuses, unless otherwise specified. Moreover, unless otherwise specified, the numbering of each method step is merely a convenient tool for identifying each method step, and is not intended to limit the order of arrangement of each method step or to define the scope of implementation of this application. Changes or adjustments to their relative relationships, without substantially changing the technical content, should also be considered as the scope of implementation of this application.

[0046] The following describes in detail embodiments of the present application. Examples of the embodiments 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 application and are not to be construed as limiting the present application.

[0047] In the description of this application, it should be understood that the terms "upper", "lower", "left", "right", "inner", "outer", "axial", "circumferential", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application 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. Therefore, they cannot be understood as limitations on this application. In addition, features defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this application, unless otherwise specified, "multiple" means two or more.

[0048] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0049] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" 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 application. 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 any one or more embodiments or examples.

[0050] The present application is further described below in conjunction with specific embodiments, but the protection scope of the present application is not limited thereto.

[0051] like Figures 1 to 5 As shown, the flat wire motor stator limiting device of the present invention includes: The driving mechanism 1 includes a rotating shaft 11 and a nut 12 sleeved on the rotating shaft 11 and threadedly connected to the rotating shaft 11; The stator tensioning mechanism 2 includes an outer tensioning structure 21 sleeved on the outside of the rotating shaft 11 for tensioning the stator outward, and an inner pushing structure 22 provided between the outer tensioning structure 21 and the rotating shaft 11 for pushing the outer tensioning structure 21 to expand radially outward; and The stator limiting mechanism 3 is detachably provided on the stator tensioning mechanism 2 and is used for limiting the position of the stator sleeved on the outer tensioning structure 21 .

[0052] like Figure 5 As shown, the inner pushing structure 22 is fixedly sleeved on the outside of the rotating shaft 11, and includes an integrally formed pressure head 22 and a conical cylinder 222. The conical cylinder 222 has an outer conical surface. The inner pushing structure 22 switches between a first position and a second position under the drive of the driving mechanism 1. The first position is a contracted position in which the outer conical surface is disengaged from the outer tensioning structure 21, and the second position is a tensioning position in which the outer tensioning structure 21 is in contact with and pressed against the outer conical surface and the inner wall of the stator at the same time.

[0053] like Figure 5 As shown, the external tensioning structure 21 includes a mold upper plate 211, a mold middle plate 212, and a mold lower plate 213, which are sequentially sleeved on the outside of the rotating shaft 11 from top to bottom. The mold lower plate 213 includes a mold lower plate body 214 sleeved on the outside of the rotating shaft 11 and an annular enclosure 215 arranged on the mold lower plate body 214 and surrounding the outside of the rotating shaft 11. A chamber for accommodating the internal pushing structure 22 is provided between the annular enclosure 215 and the rotating shaft 11. The outside of the annular enclosure 215 is provided with an assembled tensioning part 216 that moves radially along the annular enclosure 215 for tightening the stator.

[0054] like Figure 6As shown, the mold upper plate 211 includes an upper disc body 2111, and a through hole is provided in the center of the upper disc body.

[0055] like Figure 6 As shown, the mold upper disk 211 further includes a ring edge 2112 integrally formed on the bottom edge of the upper disk body 2111 and extending downward along the axial direction.

[0056] like Figure 5 and Figure 6 As shown, the mold center plate 212 has an L-shaped cross-section. Together, the mold center plate 212 and the annular edge 2112 define a positioning groove for inserting the annular enclosure. The upper edge of the annular enclosure is inserted into the positioning groove and fastened with screws. This ensures the coaxiality of the mold upper plate 211, the mold center plate 212, and the mold lower plate 213, while also ensuring efficient installation and facilitating assembly and disassembly.

[0057] like Figure 5 As shown, the annular enclosure 215 is provided with four sockets for installing the assembled tensioning part 216 at equal intervals along the circumferential direction.

[0058] like Figures 1 to 5 As shown, the assembled tightening part 216 is composed of at least two circumferential arc-shaped assembling blocks 2161, and the arc-shaped assembling blocks 2161 are movably inserted in the socket; each of the arc-shaped assembling blocks 2161 has an arc-shaped outer expansion surface 2162 located outside the annular enclosure 215 for fitting the inner wall of the stator and an inner push surface 2163 located in the chamber for adapting to the outer conical surface, the outer expansion surfaces of multiple arc-shaped assembling blocks are jointly assembled into an outer cylindrical surface for fitting the inner wall of the stator, and the inner push surfaces of multiple arc-shaped assembling blocks are jointly assembled into an inner conical surface.

[0059] like Figure 1 and Figure 5 As shown, an annular limiting groove 217 is provided on the outer edge of the bottom of the mold upper plate 211 .

[0060] like Figure 5 and Figure 6 As shown, the annular edge 2112 and the annular enclosure 215 jointly define an annular limiting groove 217 .

[0061] like Figure 1 As shown, the stator limiting mechanism 3 is composed of two circumferential arc-shaped limiting ribs, which can be detachably inserted into the annular limiting groove 217. When the arc-shaped limiting rib is inserted into the annular limiting groove 217, the outer surface of the arc-shaped limiting rib away from the rotating shaft protrudes from the outer surface of the assembled tensioning part.

[0062] like Figure 1 、 Figure 5 and Figure 6As shown, the upper portion of the rotating shaft 11 is provided with an external thread for cooperating with a nut thread.

[0063] like Figure 5 and Figure 6 As shown, the groove wall of the annular limiting groove 217 used to fit with the arc-shaped limiting rib is an inclined plane.

[0064] like Figure 5 and Figure 6 As shown, the angle between the inclined plane and the horizontal plane is an acute angle. The inclined plane serves as a guide surface to guide the arc-shaped limiting rib to smoothly fit into the annular limiting groove 217.

[0065] like Figure 5 and Figure 6 As shown, the cross-section of the arc-shaped limit rib is composed of an isosceles trapezoidal portion and a rectangular portion, or is composed of an isosceles trapezoidal portion and a rectangular portion, the longer base of the isosceles trapezoidal / quasi-isosceles trapezoidal portion is connected to the rectangular portion, and the longer base is the same size as the connecting side of the rectangle; or the cross-section of all cell walls is composed of an isosceles triangle portion and a rectangular portion, or is composed of an isosceles triangle portion and a rectangular portion, the base of the isosceles triangle / quasi-isosceles triangle portion is connected to the rectangular portion, and the base is the same size as the connecting side of the rectangle.

[0066] like Figure 5 and Figure 7 As shown, the outer diameter of the mold lower plate 214 is slightly larger than the inner diameter of the stator sleeved on the stator tensioning mechanism. The mold lower plate can cooperate with the stator limiting mechanism to initially limit the stator.

[0067] like Figure 1 and Figure 4 As shown, the stator limiting mechanism 3 is composed of two circumferential arc-shaped limiting ribs, which can be detachably inserted into the annular limiting groove. When the arc-shaped limiting rib is inserted into the annular limiting groove 217, the outer surface of the arc-shaped limiting rib away from the rotating shaft 11 protrudes from the outer cylindrical surface of the assembled tightening part 216.

[0068] like Figure 5 and Figure 6 As shown, the groove wall of the annular limiting groove 217 used to fit with the arc-shaped limiting rib is an inclined plane.

[0069] like Figure 1 As shown, the upper portion of the rotating shaft 11 is provided with an external thread for threaded engagement with the nut 12 , and the lower portion of the rotating shaft 11 is provided with a radial blocking surface 111 for supporting the bottom of the stator tensioning mechanism 2 .

[0070] like Figure 5 and Figure 6As shown, the bottom surface of the mold lower plate 214 is provided with a groove that aligns with the radial blocking surface 111. During assembly, the mold lower plate 214 is fitted over the exterior of the rotating shaft, and the radial blocking surface fits against the bottom of the groove, providing support for the mold lower plate without hindering relative rotation between the rotating shaft and the mold lower plate.

[0071] In some embodiments of the present invention, a reset device is connected between each of the arcuate assembly blocks and the tapered cylinder of the inner push structure. When the inner push structure is in the first position (i.e., the outer conical surface is disengaged from the inner push surface), the reset device can drive the arcuate assembly blocks to move radially inward until the side edges of the inner push surfaces of the arcuate assembly blocks abut against each other.

[0072] In some embodiments of the present invention, the reset device is a pull rope or a reset spring.

[0073] In some embodiments of the present invention, the arc-shaped assembly block is equipped with at least one pressure detection sensor, which is arranged on the outer expansion surface and / or the inner push surface to facilitate the detection of the pressure between the outer tensioning structure and the outer conical surface and the stator.

[0074] In some embodiments of the present invention, each arc-shaped assembly block is equipped with two groups of pressure detection sensors, which are respectively arranged on the outward expansion surface and the inward push surface.

[0075] The present invention also provides a limiting method using the flat wire motor stator limiting device, comprising the following steps: Step 1: Preliminarily insert the arc-shaped assembly blocks of the external tensioning structure 21 onto the mold lower plate 213, keeping the inner push surface and the outer expansion surface of each arc-shaped assembly block located on the inner and outer sides of the annular enclosure 215 respectively; Step 2: sequentially fix the mold middle plate 212, the mold upper plate 211, and the inner pushing structure 22 on the rotating shaft 11, and adjust the arc-shaped assembly blocks of the outer tensioning structure 21 to the first position to complete the preliminary assembly of the flat wire motor stator limit device; Step 3: Sleeve the stator onto the exterior of the preliminarily assembled flat wire motor stator limiting device, insert each arc-shaped limiting rib of the stator limiting mechanism 3 into the annular limiting groove 217 at the bottom of the mold upper plate 211, and preliminarily limit the stator through the mold lower plate 213 and the stator limiting mechanism 3; Step 4: Turn the nut 12 to drive the rotating shaft 11 to rotate. While the rotating shaft 11 rotates, it drives the inner pushing structure 22 to move downward. When the outer conical surface of the inner pushing structure 22 moves downward, it pushes the various arc-shaped assembly blocks of the assembled tightening part 216 to expand radially outward until the outward expansion surface of each arc-shaped assembly block contacts and presses the inner wall of the stator. At this time, the various arc-shaped assembly blocks of the outer tightening structure 21 are in the second position, completing the limit between the stator and the stator limit device of the flat wire motor.

[0076] The above examples are for the purpose of illustrating the embodiments disclosed in the present application and are not to be construed as limiting the present application. In addition, the various modifications listed herein and the variations of the methods and compositions in the invention will be apparent to those skilled in the art without departing from the scope and spirit of the present application. Although the present application has been specifically described with reference to various specific preferred embodiments of the present application, it should be understood that the present application should not be limited to these specific embodiments. In fact, various modifications apparent to those skilled in the art as described above to obtain the invention will fall within the scope of the present application.

Claims

1. A flat wire motor stator limiting device, characterized in that: include: The driving mechanism (1) comprises a rotating shaft (11) and a nut (12) sleeved on the rotating shaft (11) and threadedly connected to the rotating shaft (11); The stator tensioning mechanism (2) comprises an outer tensioning structure (21) sleeved on the outside of the rotating shaft (11) for tensioning the stator outward, and an inner pushing structure (22) arranged between the outer tensioning structure (21) and the rotating shaft (11) for pushing the outer tensioning structure (21) to expand radially outward; and The stator limiting mechanism (3) is detachably arranged on the stator tensioning mechanism (2) and is used to limit the stator sleeved on the outer tensioning structure (21).

2. The flat wire motor stator limiting device according to claim 1, characterized in that: The inner pushing structure (22) is fixedly sleeved on the outside of the rotating shaft (11), and comprises an integrally formed pressure head (221) and a conical cylinder (222), wherein the conical cylinder (222) has an outer conical surface. The inner pushing structure (22) switches between a first position and a second position under the drive of the driving mechanism (1), wherein the first position is a contracted position in which the outer conical surface is separated from the outer tensioning structure (21), and the second position is a tensioning position in which the outer tensioning structure (21) is in contact with and pressed against the outer conical surface and the inner wall of the stator at the same time.

3. The flat wire motor stator limiting device according to claim 1, characterized in that: The external tensioning structure (21) comprises a mold upper plate (211), a mold middle plate (212), and a mold lower plate (213) which are sequentially sleeved on the outside of the rotating shaft (11) from top to bottom. The mold lower plate (213) comprises a mold lower plate body (214) sleeved on the outside of the rotating shaft (11) and an annular enclosure (215) arranged on the mold lower plate body (214) and surrounding the outside of the rotating shaft (11). A chamber for accommodating the internal pushing structure (22) is provided between the annular enclosure (215) and the rotating shaft (11). The outside of the annular enclosure (215) is provided with an assembled tensioning portion (216) which moves radially along the annular enclosure (215) for tensioning the stator.

4. The flat wire motor stator limiting device according to claim 3, characterized in that: The annular enclosure (215) is provided with at least two sockets for installing the assembled tensioning portion (216) at intervals along the circumferential direction.

5. The flat wire motor stator limiting device according to claim 4, characterized in that: The assembled tensioning portion (216) is composed of at least two circumferential arc-shaped assembly blocks (2161), and the arc-shaped assembly blocks (2161) are movably inserted into the socket; each of the arc-shaped assembly blocks (2161) has an arc-shaped outer expansion surface (2162) located outside the annular enclosure (215) for fitting the inner wall of the stator, and an inner push surface (2163) located in the chamber for adapting to the outer conical surface. The outer expansion surfaces of multiple arc-shaped assembly blocks are assembled together to form an outer cylindrical surface for fitting the inner wall of the stator, and the inner push surfaces of multiple arc-shaped assembly blocks are assembled together to form an inner conical surface.

6. The flat wire motor stator limiting device according to claim 3, characterized in that: An annular limiting groove (217) is provided on the upper portion of the external tensioning structure.

7. The flat wire motor stator limiting device according to claim 6, characterized in that: The stator limiting mechanism (3) is composed of at least two circumferential arc-shaped limiting ribs, and the arc-shaped limiting ribs are detachably inserted into the limiting grooves. When the arc-shaped limiting ribs are inserted into the annular limiting grooves (2111), the outer surface of the arc-shaped limiting ribs away from the rotating shaft (11) protrudes from the outer cylindrical surface of the assembled tensioning portion (216).

8. The flat wire motor stator limiting device according to claim 6, characterized in that: The groove wall of the annular limiting groove (2111) used to fit with the arc-shaped limiting rib is an inclined plane.

9. The flat wire motor stator limiting device according to claim 1, characterized in that: The upper portion of the rotating shaft (11) is provided with an external thread for cooperating with the thread of the nut (12), and the lower portion of the rotating shaft (11) is provided with a radial blocking surface (111) for supporting the bottom of the stator tensioning mechanism (2).

10. A method for limiting the stator of a flat wire motor using the stator limiting device according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: pre-install the arc-shaped assembly blocks of the external tensioning structure (21) on the mold lower plate (213), and keep the inner push surface and the outer expansion surface of each arc-shaped assembly block located on the inner and outer sides of the annular enclosure (215); Step 2: sequentially fix the mold middle plate (212), the mold upper plate (211), and the inner push structure (22) on the rotating shaft (11), adjust the arc-shaped assembly blocks of the outer tensioning structure (21) to the first position, and complete the preliminary assembly of the flat wire motor stator limit device; Step 3: The stator is sleeved on the exterior of the preliminarily assembled flat wire motor stator limiting device, and each arc-shaped limiting rib of the stator limiting mechanism (3) is inserted into the annular limiting groove (2111) at the bottom of the mold upper plate (211), and the stator is preliminarily limited by the mold lower plate (213) and the stator limiting mechanism (3); Step 4: Turn the nut (12) to drive the rotating shaft (11) to rotate. When the rotating shaft (11) rotates, the inner pushing structure (22) is driven to move downward. When the outer conical surface of the inner pushing structure (22) moves downward, the arc-shaped assembly blocks of the assembled tensioning portion (216) are pushed to expand radially outward until the outer expansion surface of each arc-shaped assembly block contacts and presses the inner wall of the stator. At this time, the arc-shaped assembly blocks of the outer tensioning structure (21) are in the second position, completing the limit between the stator and the stator limit device of the flat wire motor.

Images