Multi-layer cover plate type stator support, stator and motor

Abstract

The application relates to the motor technical field and provides a multi-layer cover plate type stator support, a stator and a motor. The multi-layer cover plate type stator support comprises a winding support, winding teeth, a first cover plate and a second cover plate. The winding teeth are arranged on the inner wall of the winding support. The first cover plate is arranged on the winding support, and the first cover plate has a first wire arranging space in the axial direction and between the winding teeth. The second cover plate is arranged on the winding support, and the second cover plate has a second wire arranging space in the axial direction and between the first cover plate. The double-layer cover plates arranged on the stator support can form independent wire arranging spaces in the axial direction, and the classification of winding wires is facilitated.

Description

Technical Field

[0001] This invention relates to the field of motor technology, and in particular to a multi-layer cover plate type stator support, stator, and motor. Background Technology

[0002] Three-phase AC motors, as core power equipment in industrial drive fields, typically have a stator core made of stacked silicon steel sheets with multiple evenly distributed slots, into which three symmetrical windings are embedded. These three sets of windings are referred to as the U-phase, V-phase, and W-phase, respectively. When symmetrical three-phase AC current is applied, the stator windings generate a magnetic field with constant amplitude and continuously rotating direction. This magnetic field cuts the rotor bars, generating induced electromotive force and electromagnetic torque, thereby driving the motor. The distribution and connection quality of the stator windings directly determine the motor's magnetomotive force waveform, operating efficiency, and temperature rise characteristics, making it the most crucial aspect of the entire motor manufacturing process.

[0003] In actual motor manufacturing, the stator winding connection configuration is extremely flexible and varied to adapt to different voltage levels, power requirements, and starting characteristics. The two most common basic connection methods are star (Y) connection and delta (Δ) connection. A star connection connects the tail ends of the three-phase windings to a single point to form a neutral point, with the head end connected to the power supply; this is suitable for higher voltage and lower current applications. A delta connection connects the three-phase windings head-to-tail to form a closed loop, with all three connection points connected to the power supply; this is suitable for lower voltage and higher current applications. Furthermore, to optimize heat dissipation and reduce the current density of a single conductor, high-power motors often employ a multi-parallel branch connection design, where each phase winding consists of multiple parallel branches, making the connection relationships at the terminals even more complex.

[0004] For motor stator assemblies, the lead wires and bridging wires of the windings are usually routed on the outer wall of the stator support. Due to the diversity of the winding connection methods and the complexity of the parallel winding of each phase branch, the winding process on the stator support faces enormous challenges. During the winding and inserting process, the windings of different phases and branches need to be arranged in an interlaced manner within the limited space of the stator slots and ends. Because there are numerous bridging wires, lead wires, and internal connecting wires for each phase winding, and they often need to cross pole phase groups for connection, the windings are prone to crossing, overlapping, or even direct contact. This physical tightness makes the wire management work extremely difficult. Moreover, the large number of windings with various lead wires, and the fact that each winding wire usually runs from the outer periphery of the stator support, superimposing the three-phase branch wires, leads to severe line congestion, resulting in a messy and chaotic arrangement of wires on the upper part of the windings.

[0005] Based on this, the present invention requires a stator support, a stator and a motor, wherein the stator support is provided with a double-layer cover plate to isolate and form an independent wiring space in the axial direction, which facilitates the classification of winding wires. Summary of the Invention

[0006] This invention provides a multi-layer cover plate type stator support, stator and motor. The stator support is provided with a double-layer cover plate, which can isolate and form an independent wiring space in the axial direction, which facilitates the classification of winding wires.

[0007] This invention provides a multi-layer cover plate type stator support, comprising: a winding support, winding teeth, a first cover plate, and a second cover plate;

[0008] The winding teeth are disposed on the inner wall of the winding bracket;

[0009] The first cover plate is disposed on the winding bracket, and the first cover plate has a first wiring space between it and the winding teeth along the axial direction. The first wiring space is used for the wiring of each set of stator lead wires.

[0010] The second cover plate is disposed on the winding bracket, and the second cover plate is located on the side of the first cover plate away from the winding teeth along the axial direction. The second cover plate and the first cover plate have a second wiring space along the axial direction.

[0011] The first cover plate has multiple wire passages, each of which is used to allow each group of lead wires to pass through and enter the second wiring space. The second wiring space is used to connect and conduct each winding wire in each group of lead wires.

[0012] Optionally, the first cover plate includes a cover plate body and a connector, the connector being disposed on the cover plate body and connected to the winding teeth and axially positioned.

[0013] Optionally, the winding tooth includes a tooth body for winding and a spacer for blocking the winding, with one radial end of the tooth body connected to the inner wall of the winding bracket and the other radial end of the tooth body connected to the outer wall of the spacer.

[0014] The cover plate body is located between the inner wall of the winding bracket and the outer wall of the partition. There is a set gap between the partitions of adjacent winding teeth along the circumferential direction, and the connector is inserted into the set gap.

[0015] Optionally, the partition has a limiting surface, which is used to abut against the side of the first cover plate that is axially close to the tooth body, so that the first cover plate and the tooth body maintain a set distance.

[0016] Optionally, the connector includes a first connector and a second connector, wherein the first connector and the second connector have a deformation gap between them in the circumferential direction;

[0017] When the connector is inserted into the set gap, the deformation gap is used to allow the first connector and the second connector to deform and move closer to each other in the circumferential direction.

[0018] Optionally, the first connector is provided with a first guide surface on the side circumferentially away from the second connector, and the first guide surface is inclined circumferentially toward the side closer to the second connector and communicates with the end of the first connector axially away from the cover plate body.

[0019] And / or, the second connector is provided with a second guide surface on the side circumferentially away from the first connector, the second guide surface is inclined circumferentially toward the side close to the first connector and communicates with the end of the second connector axially away from the cover plate body.

[0020] Optionally, the multi-layer cover plate type stator support further includes a third connector, which is disposed at one axial end of the winding support, and the second cover plate is connected to the axial end of the winding support through the third connector.

[0021] And / or, the second cover plate has a cable outlet for the cable assembly after each set of lead wires is connected and conductive.

[0022] Optionally, the outer wall of the winding bracket is provided with a plurality of wiring grooves, each of which is used to provide wiring for the winding wires in each phase branch.

[0023] The present invention also provides a stator, including the multi-layer cover plate type stator support described above.

[0024] The present invention also provides an electric motor, including the multi-layer cover plate type stator support described above.

[0025] The multi-layer cover plate stator support of the present invention adopts a double cover plate form with a first cover plate and a second cover plate. A first wiring space is formed between the winding teeth and the first cover plate, and a second wiring space is formed between the first cover plate and the second cover plate. The first wiring space is used to place scattered winding wires and for wiring of each lead wire. The second wiring space is used to place the lead wire assembly and the conductor head of the winding wire, so that the winding wires in each group of lead wires can be connected and connected. This distribution structure separates the winding wires and the lead wire assembly, making full use of the axial space.

[0026] The multi-layer cover plate stator support of this invention employs a multi-layer cover plate design to divide the axial space and improve space utilization. The lateral congestion of winding wires and lead-out wire assemblies is distributed through the vertical space division along the axial direction. Each phase lead-out wire is constrained within a first wiring space, and the wire passages of the first cover plate differentiate the three phases of the same-phase lead-out wires. The second wiring space between the first and second cover plates is used to house the lead-out wire assemblies and their connecting heads with the winding wires. Depending on the actual situation, the three-phase lead-out wire assemblies can be evenly arranged in this layer. This design, by isolating and forming independent wiring spaces in the axial direction, facilitates the classification of winding wires, resulting in clear wire organization, improved internal space utilization of the stator assembly, increased production efficiency, and reduced product manufacturing difficulty. Attached Figure Description

[0027] Figure 1 The phase distribution diagram and wiring diagram of the existing stator support;

[0028] Figure 2 This is a schematic diagram of the series-parallel triangular connection structure of an existing stator support;

[0029] Figure 3 This is a schematic diagram of the existing stator structure;

[0030] Figure 4 This is a schematic diagram of the existing stator support structure;

[0031] Figure 5 This is a schematic diagram of the existing stator wiring.

[0032] Figure 6 This is a top view of a multi-layer cover plate type stator support according to an embodiment of the present invention;

[0033] Figure 7 This is a cross-sectional view of a multi-layer cover plate type stator support according to an embodiment of the present invention;

[0034] Figure 8 This is an exploded view of a multi-layer cover plate type stator support according to an embodiment of the present invention. Figure 1 ;

[0035] Figure 9 This is an exploded view of a multi-layer cover plate type stator support according to an embodiment of the present invention. Figure 2 ;

[0036] Figure 10 This is a schematic diagram of the structure of the first cover plate according to an embodiment of the present invention;

[0037] Figure 11 This is a schematic diagram of the structure of a winding bracket according to an embodiment of the present invention;

[0038] Figure 12This is a top view of the structure after the first cover plate and the winding bracket are engaged according to an embodiment of the present invention;

[0039] Figure 13 This is a three-dimensional structural diagram of the first cover plate and the winding bracket after they are combined according to an embodiment of the present invention;

[0040] Figure 14 This is a partial structural schematic diagram of the first cover plate according to an embodiment of the present invention;

[0041] Figure 15 This is a top view of a winding bracket according to an embodiment of the present invention;

[0042] Figure 16 for Figure 15 A schematic diagram of the AA cross-sectional structure;

[0043] Figure 17 This is a schematic diagram of the structure of the second cover plate according to an embodiment of the present invention.

[0044] In the attached diagram:

[0045] 100-Stator core; 200-Upper bracket; 300-Slot; 400-Conductor head; 500-Leader assembly; 600-Stator winding;

[0046] 10-Wrapping bracket; 11-Cable routing channel;

[0047] 20 - Wrapping tooth; 21 - Tooth body; 22 - Spacer; 221 - Limiting surface;

[0048] 30 - First cover plate; 31 - Cable passage; 32 - Connector; 321 - First connector; 322 - Second connector; 323 - Deformation gap; 324 - First guide surface; 325 - Second guide surface;

[0049] 40 - Second cover plate; 41 - Cable outlet; 42 - Snap-fit ​​hole;

[0050] 50 - First routing space;

[0051] 60 - Second routing space;

[0052] 70 - Third connector. Detailed Implementation

[0053] The multi-layer cover plate type stator support, stator, and motor proposed in this invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. The advantages and features of this invention will become clearer from the following description. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of this invention.

[0054] In this invention, "outer diameter" and "inner diameter" refer to the diameter of a circular structure, while for a non-circular structure, the inner diameter refers to the diameter of its inscribed circle and the outer diameter refers to the diameter of its circumscribed circle. "Axial direction" refers to the direction of the central axis of a cylindrical rod, while for a non-cylindrical rod, the axial direction refers to the length direction of the rod.

[0055] As used in this invention, the singular forms “a,” “an,” and “the” include plural objects; the term “or” is generally used to mean “and / or”; the term “a number” is generally used to mean “at least one”; and the term “at least two” is generally used to mean “two or more”. Furthermore, the terms “first,” “second,” and “third” are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as “first,” “second,” or “third” may explicitly or implicitly include one or at least two of that feature. Additionally, as used in this invention, “installed,” “connected,” “linked,” and “set” on one element from another should be interpreted broadly, generally indicating only a connection, coupling, mating, or transmission relationship between the two elements, which can be direct or indirect through an intermediate element. This connection, coupling, mating, or transmission should not be construed as indicating or implying a spatial positional relationship between the two elements, i.e., one element can be located arbitrarily inside, outside, above, below, or to one side of another element, unless otherwise explicitly stated. For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances. Furthermore, directional terms such as above, below, up, down, upward, downward, left, right, etc., are used relative to exemplary embodiments as shown in the figures, with upward or up direction pointing towards the top of the corresponding figure, and downward or down direction pointing towards the bottom of the corresponding figure.

[0056] Combination Figure 1 As shown, taking a 12-slot variable frequency three-phase motor as an example, there are twelve stator slots, so there are twelve winding teeth.

[0057] Figure 1 This is a diagram showing the phase distribution of the winding wires on the stator support. Along the counterclockwise direction, each winding tooth corresponds to the phases U1, V1, W1, U2, V2, W2, U3, V3, W3, U4, V4, and W4, respectively.

[0058] Combination Figure 2 As shown, the three phases of the motor are connected in a series-parallel delta configuration.

[0059] Figure 2The three-phase branches are as follows: the branch where U1 and U2 are connected in series and then connected in parallel with U3 and U4 (U1- connects to U2+, U3- connects to U4+), the branch where V1 and V2 are connected in series and then connected in parallel with V3 and V4 (V1- connects to V2+, V3- connects to V4+), and the branch where W1 and W2 are connected in series and then connected in parallel with W3 and W4 (W1- connects to W2+, W3- connects to W4+).

[0060] Figure 2 The phase leads include phase leads U1+, U3+, W2-, W4-, V1+, V3+, U2-, U4-, and W1+, W3+, V2-, V4-.

[0061] Combination Figure 3 and Figure 4 As shown, this is an existing stator structure, which includes a stator core 100 and an upper support 200.

[0062] The upper bracket 200 has three slots 300 on its outer wall, and the winding wires in the three slots 300 are respectively used for the routing of the three-phase branches mentioned above. The routing can be completed by winding the wires using a machine (winding equipment).

[0063] In addition, the three-phase winding leads need to be connected to the lead assembly 500. The lead wires for each phase are as follows: U1+, U3+, W2-, W4- phase leads; V1+, V3+, U2-, U4- phase leads; W1+, W3+, V2-, V4- phase leads. The routing of each phase lead wire usually requires manual wire management.

[0064] Combination Figure 5 As shown, in each phase lead, the four windings of the same phase need to be connected to the lead assembly 500 through the conductor head 400. In each phase lead, there are four windings and one lead assembly 500 of the same phase, which are connected by flame welding or crimping.

[0065] like Figure 5 As shown, the right side of the upper bracket 200 contains eight winding wires, two lead wire assemblies 500, and two conductive heads 400, while the left side contains four winding wires, one lead wire assembly 500, and one conductive head 400. The number of winding wires for each phase lead wire is relatively large, and these wires typically run from the outer periphery of the upper bracket 200, overlapping with the three-phase branch wiring. This results in severe congestion on the outer periphery of the upper bracket 200, leading to a messy and disorganized wiring arrangement above the windings. When the motor size is small and the space above the windings is insufficient, the winding wires and lead wire assemblies 500 further exacerbate the congestion, further reducing the space available for placement inside the cover plate.

[0066] Furthermore, for motor wiring schemes with complex wiring and many requiring manual wiring, the conduction of winding lines of different phases needs to be achieved by manual wiring on the upper part of the winding. Therefore, there are a large number of messy winding lines and lead wire assemblies 500 on the upper part of the stator assembly winding. This will lead to wiring confusion and difficulty in distinguishing the same phase. At the same time, all winding lines and lead wire assemblies 500 are crowded in the lateral direction, making the manufacturing process complicated and production efficiency low.

[0067] like Figure 6 and Figure 7 As shown, this embodiment provides a multi-layer cover plate type stator support, including: a winding support 10, winding teeth 20, a first cover plate 30, and a second cover plate 40.

[0068] Combination Figure 6 and Figure 7 As shown, the winding bracket 10 has an overall circular structure. In this embodiment, the circumferential, axial, and radial directions mentioned below are all based on the winding bracket 10.

[0069] The winding teeth 20 are disposed on the inner wall of the winding bracket 10. Each winding tooth 20 is arranged circumferentially on the inner circumferential surface of the winding bracket 10. The number of winding teeth 20 is determined based on the winding distribution and polarity requirements of the motor. The winding teeth 20 protrude from the inner wall of the winding bracket 10, and preferably, each winding tooth 20 is evenly distributed circumferentially on the winding bracket 10.

[0070] A first cover plate 30 and a second cover plate 40 are disposed on the winding bracket 10. In this embodiment, the first cover plate 30 and the second cover plate 40 are annular structures, and the first cover plate 30 and the second cover plate 40 are coaxially arranged with the winding bracket 10. In other alternative embodiments, the shapes of the first cover plate 30 and the second cover plate 40 can be adjusted adaptively based on the shape of the winding bracket 10.

[0071] Combination Figure 7 As shown, the winding bracket 10 is installed at one axial end of the stator core 100, and the winding teeth 20 are used for the stator winding 600 to be wound.

[0072] The first cover plate 30 is disposed on the winding bracket 10, and the first cover plate 30 has a first wiring space 50 between itself and the winding teeth 20 along the axial direction. The first wiring space 50 is used for the wiring of each set of stator leads. In addition, the first wiring space 50 is also used to accommodate the stator winding 600.

[0073] The second cover plate 40 is disposed on the winding bracket 10. The second cover plate 40 is located on the side of the first cover plate 30 away from the winding teeth 20 along the axial direction. The second cover plate 40 and the first cover plate 30 have a second wiring space 60 along the axial direction.

[0074] The first cover plate 30 has a plurality of wire passage openings 31, each of which is used to allow each group of lead wires to pass through and enter the second wiring space 60. The second wiring space 60 is used to allow each winding wire in each group of lead wires to be connected and conductive.

[0075] Combination Figure 8 As shown, before installing the first cover plate 30, the winding wires of each group of lead wires first converge above the winding teeth 20, and then pass through the wire outlet 31 on the first cover plate 30 respectively.

[0076] In this implementation, the electrode is a 12-slot variable frequency three-phase motor, using a series-parallel delta connection (with...). Figure 1 and Figure 2 (The electrodes in the middle are consistent).

[0077] Therefore, the motor has three-phase leads, namely U1+, U3+, W2-, W4- phase leads, V1+, V3+, U2-, U4- phase leads, and W1+, W3+, V2-, V4- phase leads. Corresponding to the three-phase leads, the first cover plate 30 has three wire passages 31.

[0078] Figure 8 The winding lines of phases U1+, U3+, W2-, and W4- are brought together and intersected, the winding lines of phases V1+, V3+, U2-, and U4- are brought together and intersected, and the winding lines of phases W1+, W3+, V2-, and V4- are brought together and intersected to form three lead wires, which are led out through the three wire crossing ports 31 respectively.

[0079] After the first cover plate 30 is installed on the winding bracket 10, a first wiring space 50 is formed, which constrains the wiring of the winding wires corresponding to each lead wire in the first wiring space 50. Further solutions will be provided to address the conductivity issue between the lead wires and the lead wire assembly 500. Their mating state is as follows: Figure 9 As shown.

[0080] Combination Figure 9 As shown, three lead wires pass through the first cover plate 30. Each winding wire in each lead wire is connected to the lead wire assembly 500 through a conductive head 400. Therefore, there are three conductive heads 400 and a three-strand lead wire assembly 500 above the first cover plate 30. The second cover plate 40 has a wire outlet 41, which is used for leading out of the lead wire assembly 500 after each set of lead wires is connected (specifically as shown in the figure). Figure 6 (As shown).

[0081] When the second cover plate 40 is installed on the winding bracket 10, a second wiring space 60 is formed, and the winding wires of part of the lead wires, the three conductive heads 400 and the three lead wire assemblies 500 are constrained in the second wiring space 60.

[0082] For motor wiring schemes with complex wiring and many requiring manual wiring, the conduction of windings of different phases needs to be achieved by manual wiring on the upper part of the windings. Therefore, there are a large number of messy windings and lead wires on the upper part of the stator windings, which leads to wiring confusion and difficulty in distinguishing the same phase. At the same time, all windings and lead wires are crowded in the lateral direction, making the manufacturing process complicated and production efficiency low.

[0083] The multi-layer cover plate stator support of the present invention adopts a double cover plate form of a first cover plate 30 and a second cover plate 40. A first wiring space 50 is formed between the winding teeth 20 and the first cover plate 30, and a second wiring space 60 is formed between the first cover plate 30 and the second cover plate 40. The first wiring space 50 is used to place scattered winding wires and for wiring of each lead wire. The second wiring space 60 is used to place the lead wire assembly 500 and the conductor head of the winding wire, so that each winding wire in each group of lead wires can be connected and connected. This distribution structure separates the winding wires from the lead wire assembly 500, making full use of the axial space.

[0084] The multi-layer cover plate stator support of the present invention employs a multi-layer cover plate design to divide the space in the axial direction, thereby improving space utilization. The lateral congestion of winding wires and lead wire assemblies 500 is distributed vertically through axial division. Each phase lead wire is constrained within the first wiring space 50, and the same phase lead wires are distinguished by the wire passages 31 of the first cover plate 30. The second wiring space 60 between the first cover plate 30 and the second cover plate 40 is used to house the lead wire assembly 500 and its conductive head 400 with the winding wires. Depending on the actual situation, the three-phase lead wire assemblies 500 can be evenly arranged in this layer. This design, by isolating and forming independent wiring spaces in the axial direction, facilitates the classification of winding wires, resulting in clear wire organization, improving the internal space utilization of the stator assembly, increasing production efficiency, and reducing product manufacturing difficulty.

[0085] In this embodiment, after sorting the three-phase leads, each group of leads includes four winding wires. These four winding wires are connected to the lead assembly 500 of different phases via a conductor head 400, resulting in three connection points. To ensure a reasonable circumferential distribution of these connection points in the second wiring space 60, three wire passages 31 are arranged circumferentially on the first cover plate 30. These three passages 31 are arranged in three equal parts circumferentially, allowing the conductor heads 400 of each phase to be evenly staggered circumferentially, improving space utilization. Finally, after arranging the conductor heads 400, the second cover plate 40 is closed to ensure a uniform and reasonable wiring arrangement within the second wiring space 60.

[0086] In this embodiment, a 12-slot variable frequency three-phase motor with series-parallel delta connection is used as an example, thus it has three-phase leads, and therefore three wire passages 31 are provided on the first cover plate 30. In other alternative embodiments, the number of wire passages 31 can be adjusted based on the actual type of motor.

[0087] In this embodiment, the wire passage 31 on the first cover plate 30 is a circular hole structure, the size of which should be just large enough for each phase lead to pass through without too much gap, so as to ensure the stability of the position of each phase lead. In other alternative embodiments, the wire passage 31 can be set as an ellipse, a square or other shapes. The specific shape of the wire passage 31 can be adjusted according to actual usage requirements.

[0088] Furthermore, the first cover plate 30 includes a cover plate body 31 and a connector 32. The connector 32 is disposed on the cover plate body 31 and is connected to the winding tooth 20 and axially positioned.

[0089] Combination Figure 10 As shown, the first cover plate 30 is a circular structure, and its connectors 32 are provided in four sets and are evenly connected to the inner wall of the cover plate body 31 along the circumference.

[0090] Combination Figure 11 As shown, the winding tooth 20 includes a tooth body 21 for winding and a spacer 22 for blocking the winding. The tooth body 21 extends radially, with one radial end connected to the inner wall of the winding support 10 and the other radial end connected to the outer wall of the spacer 22. The spacer 22 has a fan-shaped annular structure, and its axial dimension is larger than that of the tooth body 21. The spacer 22 is used to block the winding wound on the tooth body 21 to prevent the winding from detaching radially from the tooth body 21.

[0091] Each winding tooth 20 is evenly distributed circumferentially on the inner wall of the winding support 10. The inner walls of the partitions 22 of each winding tooth 20 are located on the same circumferential surface, and the outer walls of the partitions 22 of each winding tooth 20 are located on the same circumferential surface. Therefore, an annular space is formed between the outer walls of each partition 22 and the inner wall of the winding support 10.

[0092] The cover plate body 31 is located in the annular space between the inner wall of the winding bracket 10 and the outer wall of the partition 22, and the inner diameter of the cover plate body 31 is equal to the outer diameter of the partition 22, ensuring that the inner wall of the first cover plate 30 can conformally fit the outer wall of each partition 22. The outer diameter of the first cover plate 30 is slightly smaller than the inner diameter of the winding bracket 10, that is, there is a gap between the outer wall of the first cover plate 30 and the inner wall of the winding bracket 10, which is used to reserve space for the routing of the winding wire at the outer wall of the winding bracket 10.

[0093] Please continue to refer to this. Figure 11 As shown, there is a predetermined gap L between the spacers 22 of adjacent winding teeth 20 along the circumferential direction. Since the winding teeth 20 are evenly arranged along the circumferential direction, the predetermined gap of each adjacent spacer 22 is equal. The connectors 32 are respectively inserted into the corresponding predetermined gaps to fix the first cover plate 30.

[0094] In this embodiment, the four connectors 32 are evenly arranged circumferentially, meaning that the central angle between adjacent connectors 32 is 90°. Furthermore, each cable pass-through port 31 is located between adjacent connectors 32. In other alternative embodiments, the number of connectors 32 can be adjusted based on actual usage requirements.

[0095] In this embodiment, the connector 32 and the cover plate body 31 are integrally formed, so the connector 32 and the cover plate body 31 are made of the same material, both of which are made of insulating plastic material, which facilitates integral injection molding. In other alternative embodiments, the connector 32 and the cover plate body 31 can also be made of different materials. For example, the connector 32 can be made of rubber or other elastically deformable materials. When the connector 32 is inserted into the set gap between two adjacent partitions 22, it adaptively undergoes elastic deformation, so that the connector 32 cooperates with the winding teeth 20 in an interference fit.

[0096] In this embodiment, the first cover plate 30 is installed by an interference fit between the connector 32 and the adjacent partition 22 with a predetermined gap. In other alternative embodiments, the first cover plate 30 may also be connected to the partition 22 by snap-fit, bolt connection, or other known methods, or connected to the winding bracket 10 by snap-fit, bolt connection, or other known methods. The specific installation method of the first cover plate 30 can be adjusted based on actual usage requirements.

[0097] Furthermore, the connector 32 includes a first connector 321 and a second connector 322, and the first connector 321 and the second connector 322 have a deformation gap 323 between them in the circumferential direction.

[0098] in Figure 10 and Figure 14 As shown, both the first connector 321 and the second connector 322 are radially extending rod-like structures, and are connected to the inner wall of the winding bracket 10. The maximum circumferential dimension between the first connector 321 and the second connector 322 should be slightly larger than the circumferential dimension L of the set gap.

[0099] When the connector 32 is inserted into the set gap, since the circumferential dimension of the set gap is smaller than the maximum circumferential dimension between the first connector 321 and the second connector 322, the two sidewalls of the set gap will exert a circumferential compressive force on the first connector 321 and the second connector 322, causing them to move closer to each other. The deformation gap 323 is used to allow the first connector 321 and the second connector 322 to deform closer to each other circumferentially. The size of the deformation gap 323 can be set based on the deformation requirements of the first connector 321 and the second connector 322.

[0100] Please continue to refer to this. Figure 14 As shown, the first connector 321 is provided with a first guide surface 324 on the side circumferentially away from the second connector 322, and the first guide surface 324 is provided circumferentially towards the side of the second connector 322. Figure 14 The right side of the first connector 321 is inclined and connected to the end of the first connector 321 that is axially away from the second cover plate 40. Figure 14 The lower end of the first connector 321 (i.e., the first guide surface 324) is connected to the end of the first connector 321 near the winding tooth 20. This allows the first guide surface 324 to guide the connector 32 to slide into the set gap of the adjacent partition 22 during the installation of the first cover plate 30.

[0101] The second connector 322 is provided with a second guide surface 325 on the side circumferentially away from the first connector 321. The second guide surface 325 is inclined circumferentially towards the side closer to the first connector 321 and connects to the end of the second connector 322 axially away from the second cover plate 40. Figure 14 The lower end of the first cover plate 30, i.e., the second guide surface 325, is connected to the end of the second connector 322 near the winding tooth 20. This allows the second guide surface 325 to guide the connector 32 to slide into the set gap of the adjacent partition 22 during the installation of the first cover plate 30.

[0102] Combination Figure 14 As shown, due to the arrangement of the first guide surface 324 and the second guide surface 325, the entire connector 32 has a wedge-shaped structure that is larger at the top and smaller at the bottom, which makes it easy for the connector 32 to be inserted into the set gap of the adjacent partition 22.

[0103] In this embodiment, the first guide surface 324 and the second guide surface 325 are planar structures. In other alternative embodiments, the first guide surface 324 and the second guide surface 325 can be configured as curved surfaces.

[0104] Combination Figure 13 As shown, in this embodiment, the upper circumferential sides of the partition 22 are rounded. The rounded corners make the upper end of the set gap between adjacent partitions 22 open, which also facilitates the insertion and mating with the connector 32.

[0105] Combination Figure 15 and Figure 16 As shown, the outer wall of the partition 22 has a limiting surface 221, which is perpendicular to the axial direction.

[0106] Specifically, the partition 22 has an overall structure that is thinner at the top and thicker at the bottom. The outer diameter of the upper region (thin region) of the partition 22 is equal to the inner diameter of the first cover plate 30, and the outer diameter of the lower region (thick region) of the partition 22 is greater than or equal to the inner diameter of the first cover plate 30. Therefore, a stepped surface is formed on the outer wall of the partition 22, and this stepped surface serves as the limiting surface 221.

[0107] The limiting surface 221 is used to abut against the side of the first cover plate 30 that is axially close to the tooth body 21, so that the first cover plate 30 and the tooth body 21 maintain a set distance to ensure the axial dimension of the first wiring space 50.

[0108] The aforementioned structure of the first cover plate 30 and the partition 22 allows the first cover plate 30 to be smoothly installed on the winding bracket 10 via the connector 32. When the first cover plate 30 is pressed to a certain depth, the limiting surface 221 forms an axial constraint on the first cover plate 30, restricting further axial movement of the first cover plate 30, so as to ensure that the axial position of the first cover plate 30 is appropriate.

[0109] The limiting surface 221 is axially close to one end of the second cover plate 40 from the distance between the partition 22 and the barrier 22. Figure 16 The distance L1 from the upper end of the first cover plate 30 is greater than the axial dimension (thickness dimension) of the first cover plate 30. This can take into account the distance between the first cover plate 30 and the tooth body 21 to ensure the axial dimension of the first wiring space 50; on the other hand, it can take into account the distance between the first cover plate 30 and the second cover plate 40 to ensure the axial dimension of the second wiring space 60.

[0110] In this embodiment, the limiting surface 221 is formed by the structure of the partition 22 being thinner at the top and thicker at the bottom. In other alternative embodiments, the outer wall of the partition 22 may be connected with a protruding structure (e.g., a protrusion) to form the limiting surface 221. The specific formation of the limiting surface 221 can be adjusted based on actual needs.

[0111] Please continue to refer to this. Figure 16 As shown, the outer wall of the winding bracket 10 is provided with a plurality of wiring grooves 11, each of which is used to provide wiring for the winding wires in each phase branch.

[0112] In this embodiment, the three phases of the motor are connected in a series-parallel delta configuration (with...). Figure 1 and Figure 2 (The motor is the same). Therefore, the motor has three-phase branches, namely: the branch where U1 and U2 are connected in series and then in parallel with U3 and U4, U1- connects to U2+, and U3- connects to U4+; the branch where V1 and V2 are connected in series and then in parallel with V3 and V4, V1- connects to V2+, and V3- connects to V4+; and the branch where W1 and W2 are connected in series and then in parallel with W3 and W4, W1- connects to W2+, and W3- connects to W4+.

[0113] Therefore, in this embodiment, three cable routing grooves 11 are provided on the outer wall of the winding bracket 10. The three cable routing grooves 11 are arranged axially, and each cable routing groove extends circumferentially. The three cable routing grooves 11 are respectively used for routing the three-phase branch lines.

[0114] Please continue to refer to this. Figure 16 As shown, a third connector 70 is provided at one axial end of the winding bracket 10, and the second cover plate 40 is connected to the axial end of the winding bracket 10 through the third connector 70.

[0115] In this embodiment, the third connector 70 is a snap-fit ​​structure, and three third connectors 70 are arranged circumferentially at the axial end of the winding bracket 10. Correspondingly, combined with... Figure 17 As shown, the second cover plate 40 has three snap-fit ​​holes 42, and the three third connectors 70 snap-fit ​​with the three snap-fit ​​holes 42 of the second cover plate 40 to realize the connection between the second cover plate 40 and the winding bracket 10.

[0116] In other alternative embodiments, the second cover plate 40 may be connected to the winding bracket 10 by a known connection method such as bolt connection.

[0117] In the above embodiments, a 12-slot variable frequency three-phase motor connected in series, parallel, and delta configuration is used as an example, with twelve stator slots and twelve winding teeth 20. In other alternative embodiments, the stator support can be configured with 6 slots, 24 slots, 36 slots, etc.

[0118] This embodiment also provides a stator, which includes the aforementioned multi-layer cover plate stator support that can serve as the upper support of the stator. Furthermore, the stator also includes a stator core, a lower stator support, a cover plate, and welding end copper busbars, etc. The assembly method of the lower stator support, stator core, cover plate, and welding end copper busbars is consistent with the prior art. The difference between the above stator and existing stators lies in the improvement of the multi-layer cover plate stator support; other parts are consistent with existing stators and will not be described in detail here.

[0119] This embodiment also provides an electric motor, which includes the aforementioned multi-layer cover plate stator support that can serve as the upper support for the stator. The motor includes a stator core, a lower stator support, windings, welded end copper busbars, a rotor, and a housing, etc. The assembly and connection methods of the lower stator support, welded end copper busbars, rotor, and housing can all employ existing technologies. The difference between the above-described motor and existing motors lies in the improvement of the multi-layer cover plate stator support; other parts remain consistent with existing motors and will not be described further here.

[0120] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0121] The above description is merely a description of preferred embodiments of the present invention and is not intended to limit the scope of the present invention in any way. Any changes or modifications made by those skilled in the art based on the above disclosure shall fall within the protection scope of the claims.

Claims

1. A multi-layer cover plate type stator support, characterized in that, include: Winding bracket, winding teeth, first cover plate and second cover plate; The winding teeth are disposed on the inner wall of the winding bracket; The first cover plate is disposed on the winding bracket, and the first cover plate has a first wiring space between it and the winding teeth along the axial direction. The first wiring space is used for the wiring of each set of stator lead wires. The second cover plate is disposed on the winding bracket, and the second cover plate is located on the side of the first cover plate away from the winding teeth along the axial direction. The second cover plate and the first cover plate have a second wiring space along the axial direction. The first cover plate has multiple wire passages, each of which is used to allow each group of lead wires to pass through and enter the second wiring space. The second wiring space is used to connect and conduct each winding wire in each group of lead wires.

2. The multi-layer cover plate type stator support as described in claim 1, characterized in that, The first cover plate includes a cover plate body and a connector. The connector is disposed on the cover plate body and is connected to the winding tooth and axially positioned.

3. The multi-layer cover plate type stator support as described in claim 2, characterized in that, The winding tooth includes a tooth body for winding and a spacer for blocking the winding. One radial end of the tooth body is connected to the inner wall of the winding bracket, and the other radial end of the tooth body is connected to the outer wall of the spacer. The cover plate body is located between the inner wall of the winding bracket and the outer wall of the partition; There is a predetermined gap between adjacent circumferential partitions, and the connector is inserted into the predetermined gap.

4. The multi-layer cover plate type stator support as described in claim 3, characterized in that, The partition has a limiting surface, which is used to abut against the side of the first cover plate that is close to the tooth body along the axial direction, so that the first cover plate and the tooth body maintain a set distance.

5. The multi-layer cover plate type stator support as described in claim 3, characterized in that, The connector includes a first connector and a second connector disposed on the cover plate body, and the first connector and the second connector have a deformation gap along the circumferential direction. When the connector is inserted into the set gap, the deformation gap is used to allow the first connector and the second connector to deform and move closer to each other in the circumferential direction.

6. The multi-layer cover plate type stator support as described in claim 5, characterized in that, The first connector has a first guide surface on the side circumferentially away from the second connector. The first guide surface is inclined circumferentially toward the side closer to the second connector and connects to the end of the first connector axially away from the cover plate body. And / or, the second connector is provided with a second guide surface on the side circumferentially away from the first connector, the second guide surface is inclined circumferentially toward the side close to the first connector and communicates with the end of the second connector axially away from the cover plate body.

7. The multi-layer cover plate type stator support as described in claim 1, characterized in that, The multi-layer cover plate type stator support also includes a third connector, which is disposed at one axial end of the winding support, and the second cover plate is connected to the axial end of the winding support through the third connector. And / or, the second cover plate has a cable outlet for the cable assembly after each set of lead wires is connected and conductive.

8. The multi-layer cover plate type stator support as described in claim 1, characterized in that, The outer wall of the winding bracket is provided with multiple wiring grooves, each of which is used to provide wiring for the winding wires in each phase branch.

9. A stator, characterized in that, The stator includes a multi-layer cover plate type stator support as described in any one of claims 1 to 8.

10. An electric motor, characterized in that, The motor includes a multi-layer cover plate type stator support as described in any one of claims 1 to 8.

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