Motor

Abstract

The utility model provides a motor, and particularly relates to the technical field of micro motors, and the motor comprises a housing which is provided with a conductive structure; the rotor assembly is rotationally mounted on the machine shell; the stator assembly is fixedly arranged on the machine shell, and the stator assembly comprises a stator winding assembly; the conductive structure comprises sub-conductive structures corresponding to each phase of winding in the stator winding assembly, the same-phase winding in the stator winding assembly is connected with the corresponding sub-conductive structures, and the sub-conductive structures are connected with outgoing lines. According to the motor, the number of the outgoing lines is consistent with the phase number of the stator windings, and compared with the situation that an electric wire needs to be led out from each winding independently in a traditional motor, the complexity of wiring is reduced, the installation complexity of a client side is reduced, meanwhile, the fault rate caused by improper wiring or poor contact is reduced, and the reliability is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of micro motor, in particular to a motor. BACKGROUND

[0002] As a key executive component, micro motor has a wide range of applications in many fields such as automobiles, household appliances, communications, computers, robots, aerospace industry, industrial machinery, industrial control, military, etc. With the increasing global awareness of environmental protection and energy saving, improving motor efficiency has become a common goal of industry development. At present, in the field of micro motor, hollow cup motor, brushless DC motor, servo motor and other types are favored due to their high power density. These motors not only meet the development concept of green environmental protection and low carbon, but also show great potential in those application scenarios with high power consumption and high usage frequency.

[0003] Industrial robots, household appliances and other equipment are developing towards more efficient, energy-saving, miniaturization and intelligentization. As an indispensable executive component in these devices, motors are facing the increasing demand for lightweight, miniaturization and fast response. New motor technologies represented by hollow cup motor, servo motor and slotless brushless motor are constantly advancing towards the goal of improving efficiency, reducing weight and reducing cost. This technological trend indicates the development direction of future motor industry. In particular, PCB (Printed Circuit Board) axial flux motor, as a high torque density micro motor, is suitable for application scenarios that require small size but large output torque, such as flexible hand motor and joint motor in the field of robotics, driving motor of small unmanned aerial vehicle, and micro motor application in high-end medical equipment. Compared with traditional brushless motor, hollow cup motor and axial flux motor, PCB motor shows 2 to 3 times power / torque density advantage, better product consistency, lower development cost, higher qualification rate and better process feasibility.

[0004] However, the existing design scheme of PCB axial flux motor has some shortcomings. The traditional method is to lead out three-phase round copper wires from the end face of each stator yoke, which not only increases the difficulty of customer assembly connection, but also leads to an increase in the length of the lead-out wires, occupying more structural space and increasing the process difficulty and product cost. Another common method is to lead out three-phase round copper wires from the inner end face of the stator yoke and twist the wires and solder the coils of the same phase. Although this method solves some problems, the enameled wire used in this method performs poorly in bending performance and mechanical strength, and is prone to failure. In addition, in order to meet certain current carrying requirements, the cross-sectional area of the enameled wire is large, which may interfere with the rotor assembly and cannot meet the size requirements. CONTENT OF THE INVENTION

[0005] To solve at least one of the above-mentioned problems of the prior art, the present application provides an electric machine, comprising:

[0006] a casing, wherein an electrically conductive structure is arranged on the casing;

[0007] a rotor assembly rotatably mounted on the casing;

[0008] a stator assembly fixedly mounted on the casing, wherein the stator assembly comprises a stator winding assembly; the electrically conductive structure comprises a sub-electrically conductive structure corresponding to each phase winding in the stator winding assembly, and the same-phase windings in the stator winding assembly are connected to the corresponding sub-electrically conductive structure, and the sub-electrically conductive structure is connected to a lead-out wire.

[0009] Optionally, the stator assembly comprises a plurality of stator components, and the stator winding assembly comprises a stator winding of each stator component in the plurality of stator components.

[0010] Optionally, the electric machine further comprises a switching structure corresponding to each stator winding, wherein the switching structure comprises a switching wire corresponding to each phase winding in the corresponding stator winding, and each phase winding in the stator winding is connected to the corresponding sub-electrically conductive structure through the corresponding switching wire.

[0011] Optionally, the casing comprises a casing outer surface away from the stator assembly, and the electrically conductive structure is arranged on the casing outer surface.

[0012] The casing is provided with a lead-out structure corresponding to each switching structure, wherein the lead-out structure comprises a lead-out opening corresponding to each switching wire of the corresponding switching structure, and the switching wire passes through the corresponding lead-out opening to connect the corresponding winding and the sub-electrically conductive structure.

[0013] Optionally, the casing comprises a casing outer surface away from the stator assembly, and the electrically conductive structure is arranged on the casing outer surface.

[0014] The casing is provided with a lead-out opening corresponding to each switching structure, and the switching structure passes through the corresponding lead-out opening to connect each switching wire of the switching structure to the corresponding winding and the sub-electrically conductive structure.

[0015] Optionally, the casing comprises axially opposite casing ends, and at least one of the lead-out openings corresponding to each switching structure is provided with a casing side opening between the casing end close to the lead-out opening among the axially opposite casing ends, and the casing side opening is through the corresponding lead-out opening and the corresponding casing end.

[0016] The electric machine further comprises a casing side sheet corresponding to the casing side opening, wherein the casing side sheet is connected to the casing to cover the casing side opening.

[0017] Optionally, the adapter structure comprises a fixing member, and the plurality of adapter lines of the adapter structure are arranged on the fixing member.

[0018] Optionally, the conductive structure comprises a conductive base fixed to the outer surface of the casing, and the plurality of sub-conductive structures are fixed to the conductive base.

[0019] Optionally, the distribution of the plurality of adapter lines on the fixing member matches the distribution of the plurality of sub-conductive structures on the conductive base.

[0020] Optionally, an avoiding structure is arranged between the adapter structure and the rotor assembly.

[0021] Optionally, the plurality of stator assemblies are symmetrically distributed relative to the conductive structure, and the adapter lines are connected to the windings on the side close to the conductive structure.

[0022] By adopting the technical scheme, the application has the following beneficial effects:

[0023] The application provides an electric machine, which comprises a casing, a rotor assembly, and a stator assembly. The casing is provided with a conductive structure. The rotor assembly is rotatably installed on the casing. The stator assembly is fixedly installed on the casing. The stator assembly comprises a stator winding assembly. The conductive structure comprises a sub-conductive structure corresponding to each phase winding in the stator winding assembly. The same-phase windings in the stator winding assembly are connected to the corresponding sub-conductive structures. The sub-conductive structures are connected to the lead-out lines, so that the number of the lead-out lines is consistent with the number of the phases of the stator winding. Compared with the case that the electric wire needs to be separately led out from each winding in the traditional electric machine, the complexity of wiring is reduced, the installation complexity of the client is reduced, the failure rate caused by improper wiring or poor contact is reduced, and the reliability is improved. In addition, by reducing the number of the lead-out lines, the structure space of the lead-out line part can be reduced, the process difficulty is reduced, and the cost of the product is further reduced. Not only the production and installation process of the electric machine are simplified, but also the performance and reliability of the electric machine are improved, which adapts to the development trend of modern electric machines towards light weight, miniaturization, and high efficiency.

[0024] Other features and advantages of the application will be described in detail in the following specific embodiment part. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description only show some embodiments of the application, and the same reference numerals generally represent the same components. Other drawings can also be obtained by those skilled in the art without any creative effort.

[0026] Figure 1 is a partial sectional view of an electric machine provided by an embodiment of the present application;

[0027] Figure 2 is a side view of an electric machine provided by an embodiment of the present application;

[0028] Figure 3 is a side view of another electric machine provided by an embodiment of the present application.

[0029] The following is a supplementary description of the drawings:

[0030] 1, housing; 2, rotor assembly; 3, sub-conductive structure; 4, lead wire; 5, stator winding; 6, switching structure; 7, conductive base; 8, avoiding structure; 9, housing side piece. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0032] The term "one embodiment" or "an embodiment" as used herein means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one implementation of the present application. In the description of the application, it should be understood that the terms "upper", "lower", "top", "bottom", etc. indicate the orientation or positional relationship shown in the drawings based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited by "first", "second" can be explicitly or implicitly included one or more of the features. Moreover, the terms "first", "second" and the like are used to distinguish similar objects, and do not necessarily describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0033] Reference Figure 1 The present application provides an electric machine, which comprises:

[0034] A casing 1 is provided with a conductive structure. The casing 1 is the main frame of the motor, used to support and protect the internal components. The casing 1 is usually made of high-strength, corrosion-resistant metal materials such as aluminum alloy or stainless steel to ensure sufficient mechanical strength and good heat dissipation performance.

[0035] A rotor assembly 2 is rotatably mounted in the casing 1. The rotor assembly 2 is installed in the casing 1 and can freely rotate in the casing 1. The rotor assembly 2 usually contains permanent magnets or electromagnets for generating a rotating magnetic field. The permanent magnets of the rotor assembly 2 are usually made of high-performance magnetic materials such as neodymium iron boron, and the electromagnets are made of high-quality silicon steel to improve magnetic permeability and reduce eddy current loss.

[0036] A stator assembly is fixedly installed in the casing 1 and is the stationary part of the motor. The stator assembly includes a stator winding assembly composed of multi-phase windings for generating a fixed magnetic field. The windings are usually made of high-strength copper wire to reduce resistance and improve conductivity. The conductive structure includes a sub-conductive structure 3 corresponding to each phase winding in the stator winding assembly. The same phase windings in the stator winding assembly are connected to the corresponding sub-conductive structure 3, and the sub-conductive structure 3 is connected to the lead-out wire 4. The number of sub-conductive structures 3 is consistent with the number of phases in the stator winding assembly, and each sub-conductive structure 3 corresponds to a phase winding. For example, in a three-phase stator winding, the sub-conductive structure 3 is correspondingly provided with three sub-conductive structures. The sub-conductive structure 3 is usually provided as a columnar structure, such as a quadrangular prism. The sub-conductive structure 3 can be made of copper alloy or silver-plated copper plate to ensure good conductivity and mechanical stability. The lead-out wire 4 is usually made of high-flexibility multi-strand copper wire to improve bending resistance and mechanical strength.

[0037] Specifically, the conductive structure on the casing 1, especially the sub-conductive structure 3, connects the same phase windings in the stator winding assembly and connects to the external circuit through the lead-out wire 4. When the external power supply supplies power to the stator winding assembly through the lead-out wire 4, the multi-phase windings in the stator winding assembly will generate a fixed magnetic field. The permanent magnets or electromagnets in the rotor assembly 2 interact with the magnetic field generated by the stator winding assembly to generate a rotating torque, causing the rotor assembly 2 to rotate.

[0038] Specifically, in the embodiments of the present application, by providing a sub-conductive structure corresponding to each phase winding in the stator winding assembly, the same phase windings in the stator winding assembly are connected to the corresponding sub-conductive structure, and the sub-conductive structure is connected to the lead-out wire, so that the number of lead-out wires is consistent with the number of phases of the stator winding. Compared with the traditional motor where the wires need to be separately led out from each winding, the complexity of wiring is reduced, the installation complexity of the client is reduced, and the failure rate caused by improper wiring or poor contact is also reduced, improving the reliability. In addition, by reducing the number of lead-out wires, the structure space of the lead-out wire part can also be reduced, the process difficulty is reduced, and the cost of the product is further reduced.

[0039] In one possible implementation, the stator assembly includes a plurality of stator components, and the stator winding assembly includes a stator winding 5 of each stator component in the plurality of stator components. Specifically, the plurality of stator components are fixedly installed in the housing 1, and the conductive structure includes a sub-conductive structure 3 corresponding to each phase winding in the stator winding 5 of the plurality of stator components, the same phase windings in the stator winding 5 of the plurality of stator components are connected to the corresponding sub-conductive structure 3, and the sub-conductive structure 3 is connected to the lead-out wire 4. Assuming that the number of phases of the stator winding is x and the number of stator components is y; without the conductive structure, each phase winding of each stator component needs to be separately connected to a lead-out wire 4, so a total of x*y lead-out wires are needed; with the conductive structure, the conductive structure includes a sub-conductive structure 3 corresponding to each phase winding in the stator winding assembly, and each sub-conductive structure 3 connects all the same phase stator windings 5, so no matter how many stator components y there are, only x lead-out wires 4 are needed, and each lead-out wire 4 corresponds to a phase winding; x(y-1) lead-out wires are reduced.

[0040] Specifically, in the embodiments of the present application, by setting the sub-conductive structure 3 corresponding to each phase winding for the stator winding 5 of the plurality of stator components, not only the number of lead-out wires is greatly reduced, the wiring process is simplified, and the installation complexity of the client is reduced, but also the failure rate caused by improper wiring or poor contact is reduced, and the reliability of the motor is improved. In addition, reducing the number of lead-out wires can also reduce the structure space of the lead-out wire part and reduce the process difficulty, thereby further reducing the cost of the product.

[0041] In one possible implementation, the motor further includes a switching structure 6 corresponding to each stator winding 5, and the switching structure 6 includes a switching line corresponding to each phase winding in the corresponding stator winding 5. Each phase winding in the stator winding 5 is connected to the corresponding sub-conductive structure 3 through the corresponding switching line. Specifically, the switching line is used to connect each phase winding in the stator winding 5 and the corresponding sub-conductive structure 3. The switching line usually adopts a high-flexibility multi-strand copper wire to ensure good electrical conductivity and mechanical strength; the switching line can be connected to the sub-conductive structure 3 by welding, crimping or other reliable connection methods, ensuring the stability and reliability of the electrical connection. The design of the switching structure 6 needs to consider the layout and space limitation of the stator components to ensure reasonable wiring of the switching line and avoid interference with other components. In specific implementation, the switching line can be directly connected to the sub-conductive structure 3 to ensure smooth transmission of current, and the connection point can be designed in a form that can be repeatedly connected and detached to facilitate maintenance and repair. An intermediate connector can also be used to connect the switching line and the sub-conductive structure 3, and the intermediate connector is used to provide a more flexible connection method suitable for occasions requiring multiple plugging and unplugging.

[0042] Specifically, in the embodiments of the present application, by designing the adapter structure 6 and the sub-conductive structure 3, each phase winding in the stator winding 5 of the plurality of stator assemblies is concentratedly connected to the corresponding sub-conductive structure 3, which greatly simplifies the internal wiring.

[0043] In one possible implementation, the housing 1 includes a housing outer surface away from the stator assembly, and the conductive structure is arranged on the housing outer surface. Specifically, the stator assembly is arranged inside the housing 1, and the conductive structure is arranged outside the housing 1, so that the connection between the stator winding 5 and the conductive structure needs to pass through the housing 1.

[0044] The housing 1 is provided with a lead-out structure corresponding to each adapter structure 6, and the lead-out structure includes a lead-out opening corresponding to each adapter wire of the corresponding adapter structure 6, and the adapter wire passes through the corresponding lead-out opening to connect the corresponding winding and the sub-conductive structure 3. Specifically, the caliber of the lead-out opening is larger than the diameter of the adapter wire, so as to ensure that the adapter wire can pass through smoothly without being hindered. The position and spacing of the lead-out opening are generally matched with the position and spacing of the sub-conductive structure 3, so as to prevent mutual interference between the adapter wires. Each lead-out opening is independently arranged, so as to ensure that the adapter wire does not entangle or contact with other adapter wires when passing through, thereby ensuring the neatness and reliability of the wiring. Protective measures such as rubber sleeves or plastic sheaths can be arranged around the lead-out opening, so as to prevent the adapter wire from being abraded or damaged during the passing process. These protective measures can also play the role of insulation and dust prevention, further improving the reliability and service life of the motor.

[0045] Specifically, in the embodiments of the present application, by arranging the lead-out opening corresponding to each adapter wire, mutual interference between the adapter wires is effectively prevented, the neatness and reliability of the wiring are ensured, and the reliability of the motor is further improved.

[0046] In one possible implementation, the housing 1 includes a housing outer surface away from the stator assembly, and the conductive structure is arranged on the housing outer surface. Specifically, the stator assembly is arranged inside the housing 1, and the conductive structure is arranged outside the housing 1, so that the connection between the stator winding 5 and the conductive structure needs to pass through the housing 1.

[0047] The shell 1 is provided with an outgoing opening corresponding to each adapter structure 6, and the adapter structure 6 passes through the corresponding outgoing opening so that each adapter wire of the adapter structure 6 connects the corresponding winding and the sub-conductive structure 3. The position of the outgoing opening is close to the corresponding adapter structure 6 to reduce the length of the adapter wire and avoid unnecessary cable bending and stress concentration; at the same time, the outgoing opening avoids other key components to ensure sufficient space and operational convenience. The shape and size of the outgoing opening should match the actual size and shape of the adapter structure 6. Generally, the outgoing opening can be designed as an oval or a rectangle to adapt to different diameters of the adapter structure 6, and the size of the outgoing opening should be slightly larger than the maximum diameter of the adapter structure 6 to ensure that the adapter structure 6 can pass through smoothly. The edges of the outgoing opening can be chamfered or rounded to avoid wear and tear on the adapter structure 6 caused by sharp edges, or edge treatment tools or laser cutting technology can be used to ensure smoothness and no burrs.

[0048] Specifically, in the embodiments of the present application, one outgoing opening is provided for each adapter structure 6, rather than one outgoing opening for each adapter wire, which can significantly reduce the number of openings on the shell 1, not only simplifying the machining process of the shell 1, but also improving the structural strength and sealing performance of the shell 1, reducing the processing cost of the shell 1, while reducing the subsequent assembly workload, improving production efficiency, and reducing overall production cost. The multiple adapter wires of one adapter structure 6 are led out through the same outgoing opening, which can better organize and manage the wiring and avoid messy cables.

[0049] In one possible implementation, the adapter structure 6 includes a fixing member, and the multiple adapter wires of the adapter structure 6 are arranged on the fixing member. The fixing member is usually made of insulating materials such as polyimide (PI), polyester (PET), or FR-4, etc., which have good insulation performance and mechanical strength to ensure the safety and stability of the adapter wires. The fixing member can be designed as a flat panel, a strip, or a frame, depending on the number and layout of the adapter wires. The size of the fixing member should be large enough to accommodate all the adapter wires of the adapter structure 6 and leave enough space for wiring and connection. The adapter wires can be arranged on the fixing member in a certain order and spacing to ensure that each adapter wire has enough space and avoids interference with each other. Parallel arrangement or staggered arrangement can be used, depending on actual needs. The adapter wires can be fixed on the fixing member by welding, crimping, or pin insertion, etc. Welding is suitable for situations that require high conductivity, crimping is suitable for situations that require quick connection and disassembly, and pin insertion is suitable for situations that require multiple plugging and unplugging.

[0050] For example, the fixing member can be a FPC (Flexible Printed Circuit). The FPC has two copper pads at its ends and internal connecting copper wires. The copper pads at the ends of the FPC are used to connect the stator winding 5 and the sub-conductive structure 3. The size and shape of the copper pads can be designed according to the actual connection requirements to ensure good electrical connection. The internal connecting copper wires of the FPC are used to transmit electrical signals. The width and thickness of the connecting copper wires can be adjusted according to the current requirements to ensure low resistance and high reliability. The FPC has good flexibility and can adapt to different installation environments and space limitations, making wiring and installation easier. Moreover, the FPC has the advantage of being very thin in structure, with a thickness of about 0.2 mm, which greatly improves the bending performance and structural strength while meeting electrical performance requirements.

[0051] Specifically, in the embodiments of the present application, the plurality of adapter wires of the adapter structure 6 are arranged on the fixing member, avoiding disordered cables and improving the neatness of wiring. The design of the fixing member can effectively prevent mutual interference between the adapter wires, ensuring that each adapter wire can work normally and avoiding signal interference and mechanical damage. The design of the fixing member allows the adapter structure 6 to be installed and maintained as a module, simplifying the installation process and improving the convenience of maintenance. The use of the fixing member can reduce manual wiring and connection operations, improve the degree of automation, and reduce human errors.

[0052] In one possible implementation, the conductive structure includes a conductive base 7 fixed to the outer surface of the housing, and a plurality of sub-conductive structures 3 fixed to the conductive base 7. The conductive base 7 is usually made of materials with good electrical conductivity and mechanical strength, such as copper alloy, aluminum, or silver-plated copper plate. These materials not only have good electrical conductivity, but also have good corrosion resistance and mechanical stability. The conductive base 7 can be designed as a flat plate, a strip, or a frame, depending on the number and layout of the sub-conductive structures 3. The size of the conductive base 7 should be large enough to accommodate all the sub-conductive structures 3 and leave enough space for connection and fixation. The conductive base 7 can be fixed to the outer surface of the housing 1 by means of screws, welding, or adhesives, etc., to ensure that it does not loosen or shift during motor operation. The choice of fixation method should consider the material and structure of the housing 1 to ensure the best fixation effect. The sub-conductive structures 3 can be arranged in a certain order and spacing on the conductive base 7, ensuring that each sub-conductive structure 3 has enough space and avoids mutual interference. Parallel arrangement or staggered arrangement can be used, depending on actual requirements. The sub-conductive structures 3 can be fixed to the conductive base 7 by welding, crimping, or pin insertion, etc. Welding is suitable for situations requiring high electrical conductivity, crimping is suitable for situations requiring quick connection and disconnection, and pin insertion is suitable for situations requiring multiple plugging and unplugging.

[0053] In particular, in the embodiments of the present application, the conductive base 7 can fix multiple sub-conductive structures 3 on one platform, ensuring that they will not loosen or shift during motor operation, improving the stability of the overall structure. The fixing method of the conductive base 7 can effectively reduce the influence of vibration on the sub-conductive structure 3 during motor operation, improving the reliability and service life of the motor. The design of the conductive base 7 allows the conductive structure to be installed and maintained as a module, and is easy to implement standardized production, simplifying the installation process, improving the convenience of maintenance, reducing manual wiring and connection operations, improving the degree of automation, and reducing human error. If a sub-conductive structure 3 fails, the entire conductive base 7 can be easily replaced without the need to check and replace each sub-conductive structure 3, saving time and cost.

[0054] In one possible implementation, the distribution of multiple adapter wires on the fixing member matches the distribution of multiple sub-conductive structures 3 on the conductive base 7. Multiple adapter wires on the fixing member can be arranged in a certain order and spacing, ensuring that each adapter wire has enough space and avoids interference with each other. Multiple sub-conductive structures 3 on the conductive base 7 can also be arranged in the same order and spacing, ensuring that each sub-conductive structure 3 has enough space. In the direction from the stator winding 5 to the conductive structure, multiple adapter wires on the fixing member are aligned with multiple sub-conductive structures 3 on the conductive base 7 one by one, avoiding poor connection or poor contact due to positional deviation.

[0055] In particular, in the embodiments of the present application, the distribution of multiple adapter wires on the fixing member matches the distribution of multiple sub-conductive structures 3 on the conductive base 7, ensuring that each adapter wire can be stably connected to the corresponding sub-conductive structure 3, reducing the failure rate caused by poor connection, and improving the reliability and service life of the motor.

[0056] In one possible implementation, a clearance structure 8 is provided between the adapter structure 6 and the rotor assembly 2. The clearance structure 8 is usually made of lightweight and high-strength materials such as aluminum alloy, engineering plastic or composite materials, which have good mechanical properties and durability and can withstand certain impact and vibration. The clearance structure 8 can be designed in the form of a baffle, bracket or frame, depending on the spatial relationship between the adapter structure 6 and the rotor assembly 2. The clearance structure 8 can be fixed inside the housing 1 by screws, buckles or adhesives, or can be integrally formed with the housing 1, ensuring that it will not loosen or shift during motor operation. The clearance structure 8 is used to ensure that when the adapter structure 6 extends towards the internal rotor assembly 2 due to excessive length or external vibration impact, it can be blocked by the clearance structure 8. The clearance structure 8 should have a certain gap between the adapter structure 6 and the rotor assembly 2 to ensure that during motor operation, the clearance structure 8 will not affect the normal movement of the adapter structure 6 and the rotor assembly 2.

[0057] Specifically, in the embodiments of the present application, the avoidance structure 8 is used to physically block the extension of the adapter structure 6 to the inside rotor assembly 2 under the condition of excessive length or external vibration impact, so as to ensure that the adapter structure 6 and the rotor assembly 2 will not have the risk of interference in any case, avoid mechanical failure and electrical short circuit caused by interference, and improve the safety and reliability of the motor.

[0058] In a possible implementation, the plurality of stator assemblies are symmetrically distributed relative to the conductive structure, and the adapter wires are connected to the windings on the side of the windings close to the conductive structure. Specifically, there are two symmetric distribution conditions: the plurality of stator assemblies are symmetrically distributed around the center of the conductive structure; and the plurality of stator assemblies are symmetrically distributed on both sides of the conductive structure, i.e. axial symmetry. For motors of S-R-S configuration or more layers of configuration, the plurality of stator assemblies are symmetrically distributed on both sides of the conductive structure to form an axial symmetric layout, and the adapter wires are connected to the windings on the side of the windings close to the conductive structure, so as to realize the shortest lead-out path.

[0059] In specific implementation, for the adapter structures 6 corresponding to the stator windings 5 of the two symmetric stator assemblies, one part can be made, which greatly reduces the part procurement cost and inventory management cost.

[0060] Specifically, in the embodiments of the present application, the resistance between the two symmetric stator windings 5 and the conductive structure is ensured to be the same, which can ensure the multi-phase balance of the motor and improve the operation efficiency and performance of the motor; the shortest lead-out path reduces the length of the adapter structure 6, reduces the cost and process cost of the adapter structure 6, reduces the risk of poor contact or fracture caused by the excessive length of the lead-out wire, and improves the reliability of the motor.

[0061] In a possible implementation, the housing 1 includes axially opposite housing ends, and between at least one of the lead-out openings corresponding to each adapter structure 6 and the housing end close to the lead-out opening among the axially opposite housing ends, a housing side opening is arranged, and the housing side opening penetrates the corresponding lead-out opening and the corresponding housing end. Specifically, the radial dimension of the housing side opening can be greater than the radial dimension of the lead-out opening, so as to facilitate the installation of the adapter structure 6.

[0062] The motor further includes a housing side sheet 9 corresponding to the housing side opening, and the housing side sheet 9 is connected to the housing 1 to ensure that it will not loosen or fall off during the operation of the motor. In specific implementation, the housing side sheet 9 is connected to the housing 1 by screws, buckles or other fixing methods, and is used to cover the housing side opening. During the assembly of the motor, after the stator windings 5 are assembled with the corresponding sub-conductive structures 3 through the adapter structures 6, the assembly of the housing side sheet 9 is performed. At this time, the size accuracy can be ensured by special tool positioning, so as to ensure the accurate alignment and close cooperation between the parts.

[0063] Specifically, a corresponding shell side opening can be arranged for each lead-out opening of the adapter structure 6, as shown in the figure. In this case, the number of shell side pieces 9 also increases accordingly. In order to reduce the impact on the size of the motor, the arrangement of the shell side opening can be appropriately reduced. In a specific implementation, in order to reduce the impact on the size of the motor, only one shell side opening is usually arranged, as shown in the figure. Figure 2 Figure 3

[0064] Specifically, in the embodiments of the present application, the shell side piece 9 is separated from the shell 1, allowing the adapter structure 6 to be assembled from the shell side opening during the motor assembly process, thereby avoiding the complex process required by the traditional blind assembly method. For the lead-out opening corresponding to the shell side opening, the complex process of pressing the adapter structure 6 corresponding to the lead-out opening from the inner edge of the shell 1 and pulling it out from the lead-out opening can also be avoided. The complexity of the assembly process is reduced, the production efficiency and yield are improved, the possibility of assembly errors is reduced, and the overall quality of the product is improved. In addition, the arrangement of the shell side piece 9 also takes into account the needs of later maintenance. When internal components need to be repaired or replaced, the shell side piece 9 can be removed to facilitate maintenance. It not only meets the needs of production and manufacturing, but also takes into account the convenience of maintenance during the product life cycle.

[0065] In summary, the motor of the present application includes a shell, a rotor assembly, and a stator assembly. The shell is provided with a conductive structure. The rotor assembly is rotatably installed in the shell. The stator assembly is fixedly installed in the shell. The stator assembly includes a stator winding assembly. The conductive structure includes a sub-conductive structure corresponding to each phase winding in the stator winding assembly. The phase windings in the stator winding assembly are connected to the corresponding sub-conductive structure. The sub-conductive structure connects the lead-out wire, so that the number of lead-out wires is consistent with the number of phases of the stator winding. Compared with the traditional motor, which requires separate lead-out wires from each winding, the complexity of wiring is reduced, the installation complexity of the client is reduced, and the failure rate caused by improper wiring or poor contact is also reduced, thereby improving the reliability. In addition, by reducing the number of lead-out wires, the structure space of the lead-out wire part can also be reduced, the process difficulty is reduced, and the cost of the product is further reduced.

[0066] In the present application, unless otherwise explicitly specified and limited, the terms "connected", "connected" and the like should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the connection or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0067] ​​It should be noted that the sequence of the above-mentioned embodiments of the present application is only for description, and does not represent the advantages and disadvantages of the embodiments, and the above description of the specification is for a specific embodiment, and other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be executed in different sequences in different embodiments and can achieve the expected results. In addition, the processes depicted in the drawings do not necessarily require a specific sequence or connection order to achieve the desired results, and in some embodiments, multiple tasks can be processed in parallel or it can be advantageous.

[0068] Each embodiment in the specification is described in a progressive manner, and the same or similar parts between each embodiment can be referred to each other, and each embodiment focuses on the difference from other embodiments.

[0069] The above is only a preferred embodiment of the present application, and is not used to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. An electric machine characterized in that, The motor comprises: a casing (1) provided with an electrically conductive structure; a rotor assembly (2) rotatably mounted on the casing (1); a stator assembly fixedly mounted on the casing (1), the stator assembly comprising a stator winding assembly; the electrically conductive structure comprises a sub-electrically conductive structure (3) corresponding to each phase winding in the stator winding assembly, the same-phase windings in the stator winding assembly are connected with the corresponding sub-electrically conductive structure (3), and the sub-electrically conductive structure (3) is connected with a lead-out wire (4).

2. The electric machine of claim 1, wherein, The stator assembly comprises a plurality of stator components, and the stator winding assembly comprises a stator winding (5) of each stator component in the plurality of stator components.

3. The electric machine of claim 2, wherein, Further comprising a switching structure (6) corresponding to each stator winding (5), the switching structure (6) comprises a switching wire corresponding to each phase winding in the corresponding stator winding (5), and each phase winding in the stator winding (5) is connected with the corresponding sub-electrically conductive structure (3) through the corresponding switching wire.

4. The electric machine of claim 3, wherein, The casing (1) comprises a casing outer surface away from the stator assembly, and the electrically conductive structure is arranged on the casing outer surface. The casing (1) is provided with a lead-out structure corresponding to each switching structure (6), the lead-out structure comprises a lead-out opening corresponding to each switching wire of the corresponding switching structure (6), and the switching wire passes through the corresponding lead-out opening to connect the corresponding winding and the sub-electrically conductive structure (3).

5. The electric machine of claim 3, wherein, The casing (1) comprises a casing outer surface away from the stator assembly, and the electrically conductive structure is arranged on the casing outer surface. The casing (1) is provided with a lead-out opening corresponding to each switching structure (6), and the switching structure (6) passes through the corresponding lead-out opening to connect each switching wire of the switching structure (6) with the corresponding winding and the sub-electrically conductive structure (3).

6. The electric machine of claim 5, wherein, The casing (1) comprises axially opposite casing ends, at least one of the lead-out openings in the lead-out opening corresponding to each switching structure (6) is arranged between the casing ends close to the lead-out opening among the axially opposite casing ends, and the casing side opening penetrates the corresponding lead-out opening and the corresponding casing end, respectively. The motor further comprises a casing side sheet (9) corresponding to the casing side opening, and the casing side sheet (9) is connected with the casing (1) to cover the casing side opening.

7. The electric machine of claim 5, wherein, The switching structure (6) comprises a fixing member, and a plurality of switching wires of the switching structure (6) are arranged on the fixing member.

8. The electric machine of claim 7, wherein, The electrically conductive structure comprises an electrically conductive base (7) fixed to the casing outer surface, and a plurality of sub-electrically conductive structures (3) are fixed to the electrically conductive base (7).

9. The electric machine of claim 8, wherein, The distribution of the plurality of switching wires on the fixing member matches the distribution of the plurality of sub-electrically conductive structures (3) on the electrically conductive base (7).

10. An electric machine according to any one of claims 3 to 9, characterised in that The switching structure (6) and the rotor assembly (2) are provided with a relief structure (8).

11. The electric machine of claim 10, wherein, The plurality of stator components are symmetrically distributed relative to the electrically conductive structure, and the switching wire is connected with the winding on the side of the corresponding winding close to the electrically conductive structure.

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