Stator device of inner rotor motor and inner rotor motor

Abstract

The invention relates to an inner rotor motor and a stator device thereof. The stator device comprises a coil holder, a winding assembly and a wire assembly. The coil holder is annular and used for allowing the rotor device to penetrate through, the coil holder is provided with a first side and a second side which are far away from each other in the axial direction, and a first clamping groove, a second clamping groove and a third clamping groove which are independent from each other are formed in the outer periphery of the coil holder; the winding assembly comprises a U-phase winding, a W-phase winding and a V-phase winding which are arranged on the wire frame, the wire outlet end of the U-phase winding extends into the first clamping groove from the first side, the wire outlet end of the W-phase winding extends into the second clamping groove from the first side, and the wire outlet end of the V-phase winding extends into the third clamping groove from the first side; the wire assembly comprises a first wire, a second wire and a third wire, the first wire extends into the first clamping groove from the second side and is connected with the wire outlet end of the U-phase winding, the second wire extends into the second clamping groove from the second side and is connected with the wire outlet end of the W-phase winding, and the third wire extends into the third clamping groove from the second side and is connected with the wire outlet end of the V-phase winding.

Description

Technical Field

[0001] The present application relates to the technical field of motors, and in particular to a stator device of an inner rotor motor and the inner rotor motor. Background Art

[0002] With the rapid development of modern motor technology, the design and manufacture of motors are facing increasingly fierce market competition. Especially in the fields of power tools and household appliances, the size, power density and cost of motors have become key competitive factors. In order to meet customers' demand for miniaturization, lightness and high efficiency of products, the structural optimization of motors and the rationality of material use have become particularly important.

[0003] In motor design, inner rotor motors are widely used in various high-power power tools and equipment due to their advantages such as high speed, simple structure and good heat dissipation performance.

[0004] However, the design of inner rotor motors often faces axial length limitations while meeting high power output requirements, especially when implementing winding connection methods. In the prior art, short-circuit rings or PCB overcurrent are usually used to achieve parallel connection of windings. Both methods have their own advantages and disadvantages:

[0005] One is to use a short-circuit ring structure. Although this structure can be assembled automatically, in a multi-winding motor, a short-circuit ring needs to be connected between each winding, which increases the axial length of the motor and the overall volume, thereby increasing the manufacturing cost. Given the market's urgent demand for low cost and small volume, this solution is not ideal.

[0006] The second is the PCB overcurrent structure, which achieves current transition by adding a PCB on top of the winding. Although it can shorten the axial length of the motor to a certain extent, the current density it carries is limited and it is easy to cause overheating and unstable performance in high-current applications. In addition, the Hall sensor on the PCB may be affected by temperature, which in turn affects the control accuracy of the motor.

[0007] Based on the limitations of the above-mentioned existing technologies, a new solution is urgently needed to minimize the axial length and material cost of the motor while maintaining the output power of the motor, thereby improving market competitiveness and product reliability.

[0008] BACKGROUND OF THE PRESENT APPLICATION The above information disclosed is only used to understand the background of the concept of the present application, and does not indicate or imply that it contains information of the prior art. Summary of the invention

[0009] Based on this, it is necessary to provide a stator device of an inner rotor motor and an inner rotor motor to address the above problems.

[0010] The present application provides a stator device of an inner rotor motor, comprising:

[0011] A wire rack, the wire rack is annular and is used for the rotor device to pass through, the wire rack has a first side and a second side that are away from each other in the axial direction, and a first clamping groove, a second clamping groove and a third clamping groove that are independent of each other are formed on the outer circumference of the wire rack;

[0012] A winding assembly, the winding assembly comprising a U-phase winding, a W-phase winding and a V-phase winding arranged on the bobbin, the wire end of the U-phase winding extends from the first side into the first groove, the wire end of the W-phase winding extends from the first side into the second groove, and the wire end of the V-phase winding extends from the first side into the third groove; and

[0013] A wire assembly, the wire assembly comprising a first wire, a second wire and a third wire, the first wire extends from the second side into the first groove and is connected to the outlet end of the U-phase winding, the second wire extends from the second side into the second groove and is connected to the outlet end of the W-phase winding, and the third wire extends from the second side into the third groove and is connected to the outlet end of the V-phase winding.

[0014] The stator device of the inner rotor motor can achieve at least the following beneficial effects:

[0015] By reasonably arranging the connection layout of the outlet ends of the U-phase winding, the W-phase winding and the V-phase winding and the first wire, the second wire and the third wire in the first groove, the second groove and the third groove on the outer circumference of the wire frame, the axial length of the motor can be effectively reduced, thereby realizing a compact design of the motor and meeting the market demand for miniaturization and lightweight; the groove structure is adopted, and the connection between the outlet ends of the windings and the wires is simpler, reducing the complexity of the traditional short-circuit ring and the PCB overcurrent structure, improving the assembly efficiency and reducing the production cost; due to the optimized layout of the windings and wires, the heat dissipation performance inside the motor can be effectively improved, and the risk of overheating can be reduced, thereby improving the working stability and reliability of the motor. Reasonable wire layout and connection method can also improve the current carrying capacity, reduce the overheating problem caused by current density, and ensure the stable performance of the motor in high-power applications.

[0016] In some embodiments, the stator device of the inner rotor motor further includes a first buckle, a second buckle and a third buckle, wherein the first buckle is located in the first buckle groove and fastened to the connection between the outlet end of the U-phase winding and the first wire, the second buckle is located in the second buckle groove and fastened to the connection between the outlet end of the W-phase winding and the second wire, and the third buckle is located in the third buckle groove and fastened to the connection between the outlet end of the V-phase winding and the third wire. By using the first buckle, the second buckle and the third buckle, the connection between the outlet ends of the U-phase winding, the W-phase winding and the V-phase winding and the first wire, the second wire and the third wire can be completed quickly and conveniently during the assembly process, reducing the reliance on complex connection tools, improving production efficiency, and preventing the connection from loosening due to vibration or thermal expansion during the operation of the motor, thereby improving the reliability and durability of the motor. The buckle design can also effectively disperse the effects of external forces, so that the tension of the first wire, the second wire and the third wire will not be directly transmitted to the output ends of the U-phase winding, the W-phase winding and the V-phase winding, thereby reducing the mechanical stress on the output ends of the U-phase winding, the W-phase winding and the V-phase winding, thereby reducing the risk of failure caused by the output ends of the U-phase winding, the W-phase winding and the V-phase winding being broken or stretched.

[0017] In some embodiments, the middle part of the first groove is concave to form a first limiting groove, and the first buckle is embedded in the first limiting groove to limit the axial movement of the first buckle in the first groove. The design of the first limiting groove can effectively limit the axial movement of the first buckle in the first groove, ensuring that the buckle always remains in a predetermined position. This limitation can prevent the change of the buckle position due to vibration or external force, thereby maintaining a stable connection between the first wire and the outlet end of the U-phase winding, avoiding loose connection due to external impact or vibration during the operation of the motor, and ensuring the normal operation of the motor.

[0018] In some embodiments, the middle part of the second groove is concave to form a second limiting groove, and the second buckle is embedded in the second limiting groove to limit the axial movement of the second buckle in the second groove. The design of the second limiting groove can effectively limit the axial movement of the second buckle in the second groove, ensuring that the buckle always remains in a predetermined position. This limitation can prevent the change of the buckle position due to vibration or external force, thereby maintaining a stable connection between the second wire and the outlet end of the W-phase winding, avoiding loose connection due to external impact or vibration during the operation of the motor, and ensuring the normal operation of the motor.

[0019] In some embodiments, the middle part of the third groove is concave to form a third limiting groove, and the third buckle is embedded in the third limiting groove to limit the axial movement of the third buckle in the second groove. The design of the third limiting groove can effectively limit the axial movement of the third buckle in the third groove, ensuring that the buckle always remains in a predetermined position. This limitation can prevent the change of the buckle position due to vibration or external force, thereby maintaining a stable connection between the third wire and the outlet end of the V-phase winding, avoiding loose connection due to external impact or vibration during the operation of the motor, and ensuring the normal operation of the motor.

[0020] In some embodiments, the stator device of the inner rotor motor also includes a stator core, the bobbin includes a ring-shaped main body, a first fixing portion, a second fixing portion and a third fixing portion, the stator core is arranged on the outer circumference of the main body, the winding assembly is arranged on the inner circumference of the main body, the main body is used for the rotor device to pass through and has the first side and the second side that are far away from each other in the axial direction, one end of the first fixing portion is connected to the first side circumference of the main body, the other end of the first fixing portion is extended toward the second side, the first fixing portion is provided with the first groove, one end of the second fixing portion is connected to the first side circumference of the main body, the other end of the second fixing portion is extended toward the second side, the second fixing portion is provided with the second groove, one end of the third fixing portion is connected to the first side circumference of the main body, the other end of the third fixing portion is extended toward the second side, and the third fixing portion is provided with the third groove.

[0021] In some embodiments, the stator device of the inner rotor motor further includes an end cover, the end cover includes a cover body and a first covering part, a second covering part and a third covering part connected to the periphery of the cover body, the cover body is provided on the first side, the first covering part is provided on the first groove to limit the radial movement of the first buckle in the first groove, the second covering part is provided on the second groove to limit the radial movement of the second buckle in the second groove, and the third covering part is provided on the third groove to limit the radial movement of the third groove. The cover body of the end cover and the covering part of its periphery provide comprehensive coverage for the groove and buckle, which can prevent the influence of external environmental factors such as dust and moisture on the buckle and the wire, thereby improving the durability and reliability of the motor. The first covering part, the second covering part and the third covering part are respectively provided on the corresponding first groove, the second groove and the third groove, which can effectively limit the radial movement of each buckle. This design ensures that the buckle always remains in the correct position, avoids loosening or displacement caused by external force or vibration, and thus enhances the stability of the connection.

[0022] In some embodiments, limiting ribs are provided on both sides of any one of the first covering part, the second covering part and the third covering part along the length extension direction, and limiting grooves are provided on both sides of any one of the first fixing part, the second fixing part and the third fixing part to match the limiting ribs, and the limiting ribs can be slidably connected to the limiting grooves. The sliding connection design of the limiting ribs and the limiting grooves facilitates higher precision and flexibility during the assembly process. This sliding connection can also adapt to small errors that may occur during production and assembly, ensuring good fit between components. The matching design of the limiting ribs and the limiting grooves can form an effective limit between the covering part and the fixing part to prevent unnecessary displacement of the components during assembly or operation. This design ensures that each component can be maintained in the correct relative position and avoids loosening due to vibration or external force. In other words, by arranging limiting ribs on both sides of the first covering part, the second covering part and the third covering part, and arranging matching limiting grooves on both sides of the first fixing part, the second fixing part and the third fixing part, a sliding connection is formed, which not only enhances the structural stability and assembly accuracy of the motor stator device, improves the overall performance and reliability of the motor, but also facilitates assembly.

[0023] In some embodiments, limiting slide grooves are provided on both sides of any one of the first covering part, the second covering part and the third covering part along the length extension direction, and limiting convex ribs are provided on both sides of any one of the first fixing part, the second fixing part and the third fixing part to match the limiting slide grooves, and the limiting convex ribs can be slidably connected to the limiting grooves. The sliding connection design of the limiting convex rib and the limiting slide groove facilitates higher precision and flexibility during the assembly process. This sliding connection can also adapt to small errors that may occur during production and assembly, ensuring good fit between components. The matching design of the limiting convex rib and the limiting slide groove can form an effective limit between the covering part and the fixing part to prevent unnecessary displacement of the component during assembly or operation. This design ensures that each component can be maintained in the correct relative position and avoids loosening due to vibration or external force. In other words, by arranging limiting grooves on both sides of the first covering part, the second covering part and the third covering part, and arranging matching limiting ribs on both sides of the first fixing part, the second fixing part and the third fixing part, a sliding connection is formed, which not only enhances the structural stability and assembly accuracy of the motor stator device, improves the overall performance and reliability of the motor, but also facilitates assembly.

[0024] In some embodiments, the bobbin further includes six winding parts spaced apart on the inner circumference of the main body, the winding assembly includes six coils respectively wound on the six winding parts, the bobbin further includes a plurality of limiting parts, the plurality of limiting parts are arranged on the first side of the main body and spaced apart along the circumference of the main body, an outlet is formed between two adjacent limiting parts, the outlet ends of the plurality of coils are wound around the limiting parts from the outlet to form the outlet ends of the U-phase winding, the outlet ends of the W-phase winding and the outlet ends of the V-phase winding, and the cover body is covered on the limiting parts and is threadedly connected with the limiting parts. The six winding parts are evenly distributed around the inner side of the main body, providing sufficient space and support so that each coil can be effectively wound thereon. This design ensures the uniformity and consistency of the coils, and helps to improve the performance and efficiency of the motor. The plurality of limiting parts are spaced apart along the circumference of the main body, which can effectively limit the movement and position of the outlet ends of the coils, ensuring that they will not be displaced or loosened during operation, thereby improving the stability and reliability of the motor. The outlet formed between adjacent limiting parts provides a convenient channel for the outlet of the coil, forming the outlet of the U-phase, W-phase and V-phase windings. This design simplifies the electrical connection and reduces the complexity of wiring. The cover is set on the limiting part and is threadedly connected to it, further enhancing the stability of the overall structure. The cover not only provides physical protection to prevent the influence of the external environment on the coil, but also ensures the close connection between the various components through threaded connection, thereby improving the mechanical strength.

[0025] In some embodiments, the outlet end of the U-phase winding, the outlet end of the W-phase winding, and the outlet end of the V-phase winding are each provided with an insulating tube. Among them, the insulating tube can be an insulating fiber tube, etc. The main function of the insulating tube is to provide electrical insulation, prevent accidental contact between the outlet end and other conductive parts, avoid short circuit or leakage, and thus improve the safety and reliability of the motor. By insulating the outlet end, the influence of electromagnetic interference on the operation of the motor can be effectively reduced, ensuring that the motor will not be interfered by the external electromagnetic field when running efficiently, and improving the performance stability of the motor. The use of insulating tubes can make the installation and connection of the outlet end easier, and the operator can more easily handle the cable when making electrical connections, reducing the risk of failure caused by misoperation. The use of insulating tubes can make the outlet end of the motor look neater and more beautiful, avoiding the clutter and safety hazards that may be caused by exposed cables, thereby improving the appearance quality of the overall product. Due to the protection of the insulating tube, the outlet end of the motor is not easily damaged during maintenance and repair, and the operator can operate more conveniently when inspecting or replacing, reducing the difficulty of maintenance. The insulating tube can be selected from different materials and thicknesses according to different working environments and conditions, providing better adaptability and ensuring the normal operation of the motor under various conditions. In summary, by setting insulating tubes for the outlet ends of the U-phase, W-phase and V-phase windings, it not only enhances electrical safety and prevents short circuits and interference, but also improves the durability and maintenance convenience of the motor. This design not only improves the performance and reliability of the motor, but also provides guarantees for use and maintenance.

[0026] The present application also provides an inner rotor motor, which includes a rotor device and a stator device as described in any of the above embodiments.

[0027] The inner rotor motor includes the stator device described in any of the above embodiments, so the inner rotor motor also includes at least the following beneficial effects: by reasonably arranging the connection layout of the outlet ends of the U-phase winding, the W-phase winding and the V-phase winding and the first wire, the second wire and the third wire in the first groove, the second groove and the third groove on the outer circumference of the wire frame, the axial length of the motor can be effectively reduced, thereby realizing a compact design of the motor and meeting the market demand for miniaturization and lightweight; the groove structure is adopted, and the connection between the outlet ends of the winding and the wire is simpler, reducing the complexity of the traditional short-circuit ring and the PCB overcurrent structure, improving the assembly efficiency and reducing the production cost; due to the optimized layout of the winding and the wire, the heat dissipation performance inside the motor can be effectively improved, and the overheating risk can be reduced, thereby improving the working stability and reliability of the motor. Reasonable wire layout and connection method can also improve the current carrying capacity, reduce the overheating problem caused by current density, and ensure the stable performance of the motor in high-power applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0029] Figure 1 A schematic diagram of the structure of an inner rotor motor provided in one embodiment of the present application.

[0030] Figure 2 A cross-sectional view of an inner rotor motor provided in one embodiment of the present application.

[0031] Figure 3 An exploded schematic diagram of an inner rotor motor provided by one embodiment of the present application.

[0032] Figure 4 An exploded schematic diagram of a stator device of an inner rotor motor provided by one embodiment of the present application.

[0033] Figure 5 A structural stereoscopic diagram of a bobbin of a stator device provided in one embodiment of the present application.

[0034] Figure 6 A structural stereoscopic diagram of an end cover of a bobbin of a stator device provided in one embodiment of the present application.

[0035] Figure 7 A circuit diagram of a winding assembly provided in one embodiment of the present application.

[0036] Figure 8 A comparison diagram of the axial lengths of the ends of two inner rotor motors with conventional short-circuit ring designs and the inner rotor motor of the present application is provided for one embodiment of the present application.

[0037] Reference numerals:

[0038] 10. inner rotor motor; 11. stator device; 12. rotor device; 100. bobbin; 110. first fixing part; 111. first clamping groove; 112. first limiting groove; 120. second fixing part; 121. second clamping groove; 122. second limiting groove; 130. third fixing part; 131. third clamping groove; 132. third limiting groove; 140. main body; 141. first side; 142. second side; 150. limiting groove; 160. winding part; 170. limiting part; 180. Wire outlet; 200, winding assembly; 210, U-phase winding; 220, W-phase winding; 230, V-phase winding; 240, coil; 300, wire assembly; 310, first wire; 320, second wire; 330, third wire; 410, first buckle; 420, second buckle; 430, third buckle; 500, end cover; 510, first covering part; 520, second covering part; 530, third covering part; 540, cover body; 550, limiting rib; 600, stator core. DETAILED DESCRIPTION

[0039] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0040] See also Figures 1 to 8In some embodiments, the present application provides a stator device 11 of an inner rotor motor 10, which includes a bobbin 100, a winding assembly 200, and a conductor assembly 300. The bobbin 100 is annular and is used for the rotor device 12 to pass through. The bobbin 100 has a first side 141 and a second side 142 that are away from each other in the axial direction, and the outer circumference of the bobbin 100 is formed with a first groove 111, a second groove 121, and a third groove 131 that are independent of each other; the winding assembly 200 includes a U-phase winding 210, a W-phase winding 220, and a V-phase winding 230 arranged on the bobbin 100, and the outlet end of the U-phase winding 210 extends from the first side 141 into the first groove 111, and the outlet end of the W-phase winding 220 extends from the first side 141 into the second groove 121. The outgoing line end of the V-phase winding 230 extends from the first side 141 into the third groove 131; the wire assembly 300 includes a first wire 310, a second wire 320 and a third wire 330, the first wire 310 extends from the second side 142 into the first groove 111 and is connected to the outgoing line end of the U-phase winding 210, the second wire 320 extends from the second side 142 into the second groove 121 and is connected to the outgoing line end of the W-phase winding 220, and the third wire 330 extends from the second side 142 into the third groove 131 and is connected to the outgoing line end of the V-phase winding 230.

[0041] The stator device 11 of the inner rotor motor 10 can achieve at least the following beneficial effects:

[0042] By reasonably arranging the connection layout of the outlet ends of the U-phase winding 210, the W-phase winding 220 and the V-phase winding 230 and the first wire 310, the second wire 320 and the third wire 330 in the first groove 111, the second groove 121 and the third groove 131 on the outer periphery of the wire rack 100, the axial length of the motor can be effectively reduced, thereby realizing a compact design of the motor and meeting the market demand for miniaturization and lightweight; the groove structure is adopted, and the connection between the outlet ends of the windings and the wires is simpler, reducing the complexity of the traditional short-circuit ring and the PCB overcurrent structure, improving the assembly efficiency and reducing the production cost; due to the optimized layout of the windings and wires, the heat dissipation performance inside the motor can be effectively improved, reducing the risk of overheating, thereby improving the working stability and reliability of the motor, and the reasonable wire layout and connection method can also improve the current carrying capacity, reduce the overheating problem caused by the current density, and ensure the stable performance of the motor in high-power applications.

[0043] like Figure 2 and Figure 4As shown, in some embodiments, the stator device 11 of the inner rotor motor 10 also includes a first buckle 410, a second buckle 420 and a third buckle 430, the first buckle 410 is located in the first buckle groove 111 and is fastened to the connection between the outlet end of the U-phase winding 210 and the first wire 310, the second buckle 420 is located in the second buckle groove 121 and is fastened to the connection between the outlet end of the W-phase winding 220 and the second wire 320, and the third buckle 430 is located in the third buckle groove 131 and is fastened to the connection between the outlet end of the V-phase winding 230 and the third wire 330. By using the first clip 410, the second clip 420 and the third clip 430, the connection between the outlet ends of the U-phase winding 210, the W-phase winding 220 and the V-phase winding 230 and the first wire 310, the second wire 320 and the third wire 330 can be completed quickly and conveniently during the assembly process, reducing the dependence on complex connection tools, improving production efficiency, and preventing loose connections due to vibration or thermal expansion during motor operation, thereby improving the reliability and durability of the motor. The buckle design can also effectively disperse the effects of external forces, so that the tension of the first wire 310, the second wire 320 and the third wire 330 will not be directly transmitted to the outlet ends of the U-phase winding 210, the W-phase winding 220 and the V-phase winding 230, thereby reducing the mechanical stress on the outlet ends of the U-phase winding 210, the W-phase winding 220 and the V-phase winding 230, thereby reducing the risk of failure caused by the outlet ends of the U-phase winding 210, the W-phase winding 220 and the V-phase winding 230 being broken or stretched.

[0044] like Figure 4 and Figure 5 As shown, in some embodiments, the middle part of the first groove 111 is concave to form a first limiting groove 112, and the first buckle 410 is embedded in the first limiting groove 112 to limit the axial movement of the first buckle 410 in the first groove 111. The design of the first limiting groove 112 can effectively limit the axial movement of the first buckle 410 in the first groove 111, ensuring that the buckle always remains in a predetermined position. This restriction can prevent the change of the buckle position due to vibration or external force, thereby maintaining a stable connection between the first wire 310 and the outlet end of the U-phase winding 210, avoiding the loose connection due to external impact or vibration during the operation of the motor, and ensuring the normal operation of the motor.

[0045] like Figure 4 and Figure 5As shown, in some embodiments, the middle part of the second groove 121 is concave to form a second limiting groove 122, and the second buckle 420 is embedded in the second limiting groove 122 to limit the axial movement of the second buckle 420 in the second groove 121. The design of the second limiting groove 122 can effectively limit the axial movement of the second buckle 420 in the second groove 121, ensuring that the buckle always remains in a predetermined position. This restriction can prevent the change of the buckle position due to vibration or external force, thereby maintaining a stable connection between the second wire 320 and the outlet terminal of the W-phase winding 220, avoiding the loose connection due to external impact or vibration during the operation of the motor, and ensuring the normal operation of the motor.

[0046] like Figure 4 and Figure 5 As shown, in some embodiments, the middle part of the third groove 131 is concave to form a third limiting groove 132, and the third buckle 430 is embedded in the third limiting groove 132 to limit the axial movement of the third buckle 430 in the second groove 121. The design of the third limiting groove 132 can effectively limit the axial movement of the third buckle 430 in the third groove 131, ensuring that the buckle always remains in a predetermined position. This restriction can prevent the change of the buckle position due to vibration or external force, thereby maintaining a stable connection between the third wire 330 and the outlet end of the V-phase winding 230, avoiding the loose connection caused by external impact or vibration during the operation of the motor, and ensuring the normal operation of the motor.

[0047] like Figure 3 and Figure 4As shown, in some embodiments, the stator device 11 of the inner rotor motor 10 further includes a stator core 600, the bobbin 100 includes a ring-shaped main body 140, a first fixing portion 110, a second fixing portion 120 and a third fixing portion 130, the stator core 600 is arranged on the outer circumference of the main body 140, the winding assembly 200 is arranged on the inner circumference of the main body 140, the main body 140 is used for the rotor device 12 to pass through and has the first side 141 and the second side 142 that are far away from each other in the axial direction, one end of the first fixing portion 110 is connected to the periphery of the first side 141 of the main body 140, and the first The other end of the fixing portion 110 extends toward the second side 142, and the first fixing portion 110 is provided with the first groove 111. One end of the second fixing portion 120 is connected to the periphery of the first side 141 of the main body 140, and the other end of the second fixing portion 120 extends toward the second side 142, and the second fixing portion 120 is provided with the second groove 121. One end of the third fixing portion 130 is connected to the periphery of the first side 141 of the main body 140, and the other end of the third fixing portion 130 extends toward the second side 142, and the third fixing portion 130 is provided with the third groove 131.

[0048] like Figure 4 and Figure 5 As shown, in some embodiments, the stator device 11 of the inner rotor motor 10 further includes an end cover 500, the end cover 500 includes a cover body 540 and a first covering portion 510, a second covering portion 520 and a third covering portion 530 connected to the periphery of the cover body 540, the cover body 540 is provided on the first side 141, the first covering portion 510 is provided on the first clamping groove 111 to limit the radial movement of the first clamping buckle 410 in the first clamping groove 111, the second covering portion 520 is provided on the second clamping groove 121 to limit the radial movement of the second clamping buckle 420 in the second clamping groove 121, and the third covering portion 530 is provided on the third clamping groove 131 to limit the radial movement of the third clamping groove 131. The cover body 540 of the end cover 500 and the covering portions of the periphery thereof provide comprehensive coverage for the clamping groove and the clamping buckle, which can prevent the influence of external environmental factors such as dust and moisture on the clamping buckle and the wire, thereby improving the durability and reliability of the motor. The first covering portion 510, the second covering portion 520 and the third covering portion 530 are respectively covered on the corresponding first clamping groove 111, the second clamping groove 121 and the third clamping groove 131, which can effectively limit the radial movement of each buckle. This design ensures that the buckle always remains in the correct position, avoids loosening or displacement caused by external force or vibration, and thus enhances the stability of the connection.

[0049] like Figure 5 and Figure 6 As shown, in some embodiments, both sides of any one of the first covering portion 510, the second covering portion 520 and the third covering portion 530 are provided with limiting ribs 550 along the length extension direction, and both sides of any one of the first fixing portion 110, the second fixing portion 120 and the third fixing portion 130 are provided with limiting grooves adapted to the limiting ribs 550, and the limiting ribs 550 can be slidably connected to the limiting grooves 150. The sliding connection design of the limiting ribs 550 and the limiting grooves facilitates higher precision and flexibility during the assembly process. This sliding connection can also adapt to small errors that may occur during production and assembly, ensuring good fit between components. The matching design of the limiting ribs 550 and the limiting grooves can form an effective limit between the covering portion and the fixing portion, preventing the components from being displaced unnecessarily during assembly or operation. This design ensures that each component can be kept in the correct relative position and avoids loosening caused by vibration or external force. In other words, by providing limiting ribs 550 on both sides of the first covering portion 510, the second covering portion 520 and the third covering portion 530, and providing matching limiting grooves on both sides of the first fixing portion 110, the second fixing portion 120 and the third fixing portion 130, a sliding connection is formed, which not only enhances the structural stability and assembly accuracy of the motor stator device 11, improves the overall performance and reliability of the motor, but also facilitates assembly.

[0050] In some embodiments, both sides of any one of the first covering portion 510, the second covering portion 520 and the third covering portion 530 are provided with limiting slide grooves along the length extension direction, and both sides of any one of the first fixing portion 110, the second fixing portion 120 and the third fixing portion 130 are provided with limiting convex ribs 550 adapted to the limiting slide grooves, and the limiting convex ribs 550 can be slidably connected to the limiting grooves 150. The sliding connection design of the limiting convex rib 550 and the limiting slide groove facilitates higher precision and flexibility during the assembly process. This sliding connection can also adapt to small errors that may occur during production and assembly, ensuring good fit between components. The matching design of the limiting convex rib 550 and the limiting slide groove can form an effective limit between the covering portion and the fixing portion to prevent unnecessary displacement of the component during assembly or operation. This design ensures that each component can be kept in the correct relative position and avoids loosening caused by vibration or external force. In other words, by providing limiting grooves on both sides of the first covering portion 510, the second covering portion 520 and the third covering portion 530, and providing matching limiting ribs 550 on both sides of the first fixing portion 110, the second fixing portion 120 and the third fixing portion 130, a sliding connection is formed, which not only enhances the structural stability and assembly accuracy of the motor stator device 11, improves the overall performance and reliability of the motor, but also facilitates assembly.

[0051] like Figure 4 As shown, in some embodiments, the bobbin 100 also includes six winding parts 160 spaced apart on the inner circumference of the main body 140, the winding assembly 200 includes six coils 240 respectively wound around the six winding parts 160, the bobbin 100 also includes a plurality of limiting parts 170, the plurality of limiting parts 170 are provided on the first side 141 of the main body 140 and spaced apart along the circumferential direction of the main body 140, an outlet 180 is formed between two adjacent limiting parts 170, and the outlet ends of the plurality of coils 240 are wound from the outlet 180 through the limiting part 170 to form the outlet end of the U-phase winding 210, the outlet end of the W-phase winding 220 and the outlet end of the V-phase winding 230, and the cover body 540 is covered on the limiting part 170 and is threadedly connected to the limiting part 170. The six winding parts 160 are evenly distributed around the inner side of the main body 140, providing sufficient space and support so that each coil 240 can be effectively wound thereon. This design ensures the uniformity and consistency of the coil 240, which helps to improve the performance and efficiency of the motor. A plurality of limiting parts 170 are arranged at intervals along the circumference of the main body 140, which can effectively limit the movement and position of the outlet end of the coil 240, ensuring that it will not be displaced or loosened during operation, thereby improving the stability and reliability of the motor. The outlet port 180 formed between adjacent limiting parts 170 provides a convenient channel for the outlet end of the coil 240, forming the outlet end of the U-phase, W-phase and V-phase winding 230. This design simplifies electrical connections and reduces the complexity of wiring. The cover body 540 is covered on the limiting part 170 and is threadedly connected thereto, further enhancing the stability of the overall structure. The cover body 540 not only provides physical protection to prevent the influence of the external environment on the coil 240, but also ensures the close combination between the various components through threaded connection, thereby improving the mechanical strength.

[0052] In some embodiments, the outlet terminal of the U-phase winding 210, the outlet terminal of the W-phase winding 220, and the outlet terminal of the V-phase winding 230 are each provided with an insulating tube. Among them, the insulating tube can be an insulating fiber tube or the like. The main function of the insulating tube is to provide electrical insulation, prevent accidental contact between the outlet terminal and other conductive parts, avoid the occurrence of short circuit or leakage, thereby improving the safety and reliability of the motor. By insulating the outlet terminal, the impact of electromagnetic interference on the operation of the motor can be effectively reduced, ensuring that the motor will not be disturbed by the external electromagnetic field when running efficiently, and improving the performance stability of the motor. The use of insulating tubes can make the installation and connection of the outlet terminal easier, and the operator can more easily handle the cable when making electrical connections, reducing the risk of failure caused by misoperation. The use of insulating tubes can make the outlet terminal of the motor look neater and more beautiful, avoiding the clutter and safety hazards that may be caused by exposed cables, thereby improving the appearance quality of the overall product. Due to the protection of the insulating tube, the outlet terminal of the motor is not easily damaged during maintenance and overhaul. The operator can operate more conveniently during inspection or replacement, reducing the difficulty of maintenance. The insulating tube can select different materials and thicknesses according to different working environments and conditions to provide better adaptability and ensure the normal operation of the motor under various conditions. In summary, by arranging insulating tubes for the outlet terminals of the U-phase, W-phase and V-phase windings 230, not only the electrical safety is enhanced, short circuits and interference are prevented, but also the durability and maintenance convenience of the motor are improved. This design not only improves the performance and reliability of the motor, but also provides guarantees for use and maintenance.

[0053] In addition, if Figure 1 and Figure 3 As shown, the present application further provides an inner rotor motor 10, which includes a rotor device 12 and a stator device 11 as described in any of the above embodiments.

[0054] The inner rotor motor 10 includes the stator device 11 described in any of the above embodiments, so the inner rotor motor 10 also includes at least the following beneficial effects: by reasonably arranging the connection layout of the outlet ends of the U-phase winding 210, the W-phase winding 220 and the V-phase winding 230 and the first wire 310, the second wire 320 and the third wire 330 in the first groove 111, the second groove 121 and the third groove 131 on the outer circumference of the wire frame 100, the axial length of the motor can be effectively reduced, thereby realizing a compact design of the motor and meeting the market demand for miniaturization and lightweight; the groove structure is adopted, and the connection between the outlet ends of the winding and the wire is simpler, reducing the complexity of the traditional short-circuit ring and the PCB overcurrent structure, improving the assembly efficiency and reducing the production cost; due to the optimized layout of the winding and the wire, the heat dissipation performance inside the motor can be effectively improved, the overheating risk can be reduced, and the working stability and reliability of the motor can be improved. Reasonable wire layout and connection method can also improve the current carrying capacity, reduce the overheating problem caused by current density, and ensure the stable performance of the motor in high-power applications.

[0055] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0056] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

[0057] In the description of the present application, it should be understood that the terms "axial", "radial", "circumferential", "length", "width", "thickness", "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0058] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0059] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0060] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0061] It should be noted that when an element is referred to as being "located on", "fixed on" or "set on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0062] In the description of this specification, the description of reference terms "one embodiment", "other implementation methods", etc. means that the specific features, structures, materials or features 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 schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of the present application. The terms used herein in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application.

Claims

1. A stator device for an inner rotor motor, characterized in that: include: A wire rack, the wire rack is annular and is used for the rotor device to pass through, the wire rack has a first side and a second side that are away from each other in the axial direction, and a first clamping groove, a second clamping groove and a third clamping groove that are independent of each other are formed on the outer circumference of the wire rack; A winding assembly, the winding assembly comprising a U-phase winding, a W-phase winding and a V-phase winding arranged on the bobbin, the outlet end of the U-phase winding extends from the first side into the first card groove, the outlet end of the W-phase winding extends from the first side into the second card groove, and the outlet end of the V-phase winding extends from the first side into the third card groove; as well as A wire assembly, the wire assembly comprising a first wire, a second wire and a third wire, the first wire extends from the second side into the first groove and is connected to the outlet end of the U-phase winding, the second wire extends from the second side into the second groove and is connected to the outlet end of the W-phase winding, and the third wire extends from the second side into the third groove and is connected to the outlet end of the V-phase winding.

2. The stator device of the inner rotor motor according to claim 1, characterized in that: The stator device of the inner rotor motor also includes a first buckle, a second buckle and a third buckle, the first buckle is located in the first buckle groove and is fastened to the connection between the outlet end of the U-phase winding and the first wire, the second buckle is located in the second buckle groove and is fastened to the connection between the outlet end of the W-phase winding and the second wire, and the third buckle is located in the third buckle groove and is fastened to the connection between the outlet end of the V-phase winding and the third wire.

3. The stator device of the inner rotor motor according to claim 2, characterized in that: A first limiting groove is formed in the middle of the first clamping groove, and the first clamping buckle is embedded in the first limiting groove to limit the movement of the first clamping buckle in the axial direction of the first clamping groove; And / or, a second limiting groove is formed inwardly in the middle of the second clamping groove, and the second clamping buckle is embedded in the second limiting groove to limit the movement of the second clamping buckle in the axial direction of the second clamping groove; And / or, a third limiting groove is formed inwardly in the middle of the third clamping groove, and the third clamping buckle is embedded in the third limiting groove to limit the axial movement of the third clamping buckle in the second clamping groove.

4. The stator device of the inner rotor motor according to claim 3, characterized in that: The stator device of the inner rotor motor also includes a stator core, the bobbin includes an annular main body, a first fixing portion, a second fixing portion and a third fixing portion, the stator core is arranged on the outer circumference of the main body, the winding assembly is arranged on the inner circumference of the main body, the main body is used for the rotor device to pass through and has the first side and the second side that are far away from each other in the axial direction, one end of the first fixing portion is connected to the first side circumference of the main body, the other end of the first fixing portion is extended toward the second side, the first fixing portion is provided with the first clamping groove, one end of the second fixing portion is connected to the first side circumference of the main body, the other end of the second fixing portion is extended toward the second side, the second fixing portion is provided with the second clamping groove, one end of the third fixing portion is connected to the first side circumference of the main body, the other end of the third fixing portion is extended toward the second side, and the third fixing portion is provided with the third clamping groove.

5. The stator device of the inner rotor motor according to claim 4, characterized in that: The stator device of the inner rotor motor also includes an end cover, which includes a cover body and a first covering portion, a second covering portion and a third covering portion connected to the periphery of the cover body, the cover body is covered on the first side, the first covering portion is covered on the first clamping groove to limit the radial movement of the first clamping groove, the second covering portion is covered on the second clamping groove to limit the radial movement of the second clamping groove, and the third covering portion is covered on the third clamping groove to limit the radial movement of the third clamping groove.

6. The stator device of the inner rotor motor according to claim 5, characterized in that: Limiting ribs are provided on both sides of any one of the first covering part, the second covering part and the third covering part along the length extension direction, and limiting sliding grooves matched with the limiting ribs are provided on both sides of any one of the first fixing part, the second fixing part and the third fixing part, and the limiting ribs can be slidably connected to the limiting grooves.

7. The stator device of the inner rotor motor according to claim 5, characterized in that: Limiting slide grooves are provided on both sides of any one of the first covering part, the second covering part and the third covering part along the length extension direction, and limiting convex ribs adapted to the limiting slide grooves are provided on both sides of any one of the first fixing part, the second fixing part and the third fixing part, and the limiting convex ribs can be slidably connected to the limiting grooves.

8. The stator device of the inner rotor motor according to claim 5, characterized in that: The bobbin also includes six winding parts which are arranged at intervals on the inner circumference of the main body, the winding assembly includes six coils respectively wound on the six winding parts, the bobbin also includes a plurality of limiting parts, the plurality of limiting parts are arranged on the first side of the main body and are spaced along the circumferential direction of the main body, a wire outlet is formed between two adjacent limiting parts, and the wire outlet ends of the plurality of coils are wound from the wire outlet through the limiting parts to form the wire outlet ends of the U-phase winding, the wire outlet ends of the W-phase winding and the wire outlet ends of the V-phase winding, and the cover body is covered on the limiting parts and is threadedly connected to the limiting parts.

9. The stator device of the inner rotor motor according to claim 8, characterized in that: The outgoing wire end of the U-phase winding, the outgoing wire end of the W-phase winding and the outgoing wire end of the V-phase winding are respectively sleeved with an insulating tube.

10. An inner rotor motor, characterized in that: The invention comprises a rotor device and a stator device according to any one of claims 1 to 9.

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