Motor assembly and assembling method thereof

Abstract

The invention discloses a motor assembly and an assembling method thereof, the motor comprises a stator assembly, winding coils of the stator assembly are located between two claw pole plates which are oppositely arranged, each claw pole plate is provided with a limiting part, and the claw pole plates at the two ends and a cylinder body are arranged in a limiting mode or fixedly connected in the axial direction of the cylinder body; in every two adjacent phases of windings, the two oppositely arranged claw pole plates are arranged in a limiting manner or fixedly connected with the cylinder body, or one of the two oppositely arranged claw pole plates is arranged in a limiting manner or fixedly connected with the cylinder body, and the two oppositely arranged claw pole plates are arranged in a limiting manner or fixedly connected with the cylinder body; the circumferential relative position of each claw pole plate relative to the cylinder body can be respectively limited, circumferential positioning meeting the function requirement of the motor is provided for each claw pole plate, and the product setting cost and the process implementation cost can be effectively reduced.

Description

Technical Field

[0001] This invention relates to the field of pneumatics, and particularly to a pneumatic device and its manufacturing method. Background Technology

[0002] The coil assembly of the motor is mounted on the outside of the pole teeth of two opposing claw pole plates, with the pole teeth of one claw pole plate inserted between two pole teeth of the other claw pole plate. Simultaneously, the corresponding pole teeth on the two claw pole plates of adjacent phases have a certain included angle in the circumferential direction to meet the motor performance requirements.

[0003] Taking a three-phase motor as an example, the relevant technology places six claw pole plates as inserts in an injection mold and connects them through process inserts to form a claw pole plate assembly that meets the requirements of the circumferential relative positional relationship between the claw pole plates. Then, the claw pole plate assembly is placed in a metal sleeve to assemble the motor.

[0004] However, to limit the relative positions of each claw plate by connecting them with process inserts, a separate injection mold needs to be developed, which is complex and too costly. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the present invention provides a motor device and its assembly method, which effectively reduces manufacturing costs while satisfying the relative positional relationship between each claw pole plate.

[0006] The present invention provides a motor assembly, including a stator assembly, the stator assembly including a cylinder and a multi-phase winding disposed within the cylinder; the coil of each phase winding is located between two opposing claw pole plates, the pole teeth of the two claw pole plates extend from their respective pole plate bodies toward each other, and at least a portion of the pole teeth of one claw pole plate extends into the tooth groove of the other claw pole plate; two adjacent claw pole plates of two adjacent phase windings are arranged back to back, and the pole teeth of the two back-to-back claw pole plates are staggered in the circumferential direction;

[0007] The electrode body of the claw electrode plate is provided with a limiting part. In the axial projection plane, the limiting parts of the two claw electrode plates of each phase winding are staggered, and the limiting parts of the two claw electrode plates of adjacent phase windings that are set opposite to each other are overlapped.

[0008] Along the axial direction of the cylinder, the claw plates at both ends are limited or fixedly connected to the cylinder;

[0009] In each adjacent phase winding, the two claw pole plates arranged in opposite directions are respectively limited or fixedly connected to the cylinder; or, one of the two claw pole plates arranged in opposite directions is limited or fixedly connected to the cylinder, and the two claw pole plates arranged in opposite directions are limited or fixedly connected.

[0010] Such a motor assembly, with limiting portions provided on the pole plate bodies of the claw pole plates, ensures that the limiting portions of the two claw pole plates for each phase winding are staggered in the axial projection plane, while the limiting portions of the two opposing claw pole plates for adjacent phase windings coincide. This satisfies the circumferential relative positional relationship between the claw pole plates. On one hand, it ensures that at least a portion of the pole teeth of one of the two opposing claw pole plates for each phase winding extends into the tooth groove of the other. On the other hand, it ensures that the corresponding pole teeth on the opposing claw pole plates of adjacent phase windings are staggered circumferentially. By limiting or fixing the claw pole plates at both ends of the cylinder along the axial direction of the cylinder; in each adjacent phase winding, the two claw pole plates arranged opposite to each other are respectively limited or fixedly connected to the cylinder, or one of the two claw pole plates arranged opposite to each other is limited or fixedly connected to the cylinder. The limitation or fixed connection of the two claw pole plates opposite to each other can provide circumferential positioning for each claw pole plate to meet the functional requirements of the motor, and respectively limit the circumferential relative position of each claw pole plate relative to the cylinder. Overall, it can effectively reduce the product setup cost and process implementation cost.

[0011] The present invention also provides a method for assembling a motor assembly, comprising the following steps:

[0012] A claw electrode plate is provided, the claw electrode plate including a limiting part;

[0013] Provide positioning services;

[0014] Assemble at least one phase winding, the winding including a first claw pole plate, a coil and a second claw pole plate, and install the first claw pole plate, the coil and the second claw pole plate of at least one phase winding in sequence. Use a positioning mechanism to make the limiting part of the first claw pole plate and the limiting part of the second claw pole plate circumferentially offset in the axial projection plane. In the axial projection plane, at least a portion of the pole tooth of one claw pole plate of the winding extends into the tooth groove of the other claw pole plate.

[0015] Assemble two opposing claw pole plates of two adjacent phase windings. Use a positioning mechanism to make the limiting parts of the two opposing claw pole plates face each other in the circumferential direction in the axial projection plane, so that the limiting parts of the two opposing claw pole plates of the two adjacent phase windings coincide and the pole teeth of the two opposing claw pole plates of the two adjacent phase windings are staggered in the circumferential direction.

[0016] This motor assembly method utilizes a positioning mechanism to offset the limiting portions of the first and second claw pole plates circumferentially within the axial projection plane. Within the axial projection plane, at least a portion of the pole teeth of one claw pole plate of the winding extends into the tooth groove of the other claw pole plate. The positioning mechanism also positions the limiting portions of the two opposing claw pole plates circumferentially relative to each other within the axial projection plane, ensuring that the limiting portions of the two opposing claw pole plates of adjacent phase windings coincide, and the pole teeth of the two opposing claw pole plates of adjacent phase windings are circumferentially offset. By staggering the positions of the claw pole plates, the relative circumferential positions of each claw pole plate are satisfied. On the one hand, this ensures that at least a portion of the pole teeth of one of the two claw pole plates corresponding to each phase winding extends into the tooth groove of the other. On the other hand, it ensures that the corresponding pole teeth on the two claw pole plates of adjacent phase windings that are set opposite to each other are staggered in the circumferential direction. This provides circumferential positioning for each claw pole plate to meet the functional requirements of the motor, and limits the relative circumferential position of each claw pole plate relative to the cylinder. Overall, this can effectively reduce product setup costs and process implementation costs. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the stator assembly of the motor in Embodiment 1 of this application;

[0018] Figure 2 for Figure 1 Top view;

[0019] Figure 3 for Figure 2 AA section view;

[0020] Figure 4 A side view showing the relative positional relationship between two opposing claw plates.

[0021] Figure 5 This is a schematic diagram showing the relative positional relationship of each claw plate of a sub-component in an embodiment of this application;

[0022] Figure 6 This is a top view of the claw electrode plate in Embodiment 1 of this application;

[0023] Figure 7 This is a top sectional view of the cylinder in Embodiment 1 of this application;

[0024] Figure 8 for Figure 7 BB section view in the middle;

[0025] Figure 9 for Figure 5 Top view;

[0026] Figure 10 for Figure 1 The flowchart of the assembly method for the motor stator assembly shown is shown.

[0027] Figure 11 This is a top view of the claw electrode plate in Embodiment 2 of this application;

[0028] Figure 12 This is a schematic diagram showing the relative positional relationship of each claw pole plate of the stator assembly in Embodiment 3 of this application;

[0029] Figure 13 This is a top view of the claw electrode plate in Embodiment 3 of this application;

[0030] Figure 14 This is a top sectional view of the cylinder in Embodiment 3 of this application;

[0031] Figure 15 for Figure 14 GG section view in the image.

[0032] In the picture:

[0033] Stator assembly 10, claw pole plate 1, first claw pole plate 1′, second claw pole plate 1″, pole tooth 11, pole tooth 11′, pole tooth 11″, tooth groove 12, pole plate body 13, limiting part 131, cylinder 2, hole part 21, first-stage hole part 21a, second-stage hole part 21b, third-stage hole part 21c, fourth-stage hole part 21d;

[0034] First winding A, second winding B, third winding C, positioning mechanism 003. Detailed Implementation

[0035] To enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0036] Please see Figure 1 , Figure 2 and Figure 3 ,in, Figure 1 This is a schematic diagram of the overall structure of the stator assembly of the motor assembly according to Embodiment 1 of this application. Figure 2 for Figure 1 Top view, Figure 3 for Figure 2 AA sectional view.

[0037] It should be noted that this invention describes the stator assembly structure of a specific motor assembly, aiming to improve the fitting structure between the electronic claw plate and the cylinder adapter. For other components of the motor assembly, such as, but not limited to, the coils and rotor of the stator assembly, the technical solution of this invention does not particularly limit the structure of these components. Those skilled in the art can apply the technical solution disclosed in this invention to all similar motor assembly scenarios. The descriptions of the coils, rotors, and other components in this embodiment are merely for understanding the basic working principle of the motor and do not constitute substantial limitations.

[0038] In this embodiment, the stator assembly 10 of a three-phase motor is used as an example. Figure 3 As shown, the three-phase (A\B\C) windings are sequentially arranged inside the cylinder 2 of the stator assembly 10, and the coil of each phase winding (not shown in the figure) is located between two opposing claw pole plates 1. For ease of description, the two claw pole plates 1 corresponding to each phase coil are defined as the first claw pole plate 1′ and the second claw pole plate 1″, and the direction of the extension of the axis of the cylinder 2 is defined as the axial direction.

[0039] Two claw pole plates 1 are arranged opposite each other for each phase winding, and at least a portion of the pole teeth 11 of one claw pole plate 1 extends into the tooth groove 12 of the other claw pole plate 1. That is, each pole tooth 11 on the first claw pole plate 1′ and each pole tooth 11 on the second claw pole plate 1″ are arranged sequentially at intervals in the circumferential direction.

[0040] In this design, two adjacent claw pole plates 1 of two adjacent phase windings are arranged back-to-back, and the corresponding pole teeth 11 on the two back-to-back claw pole plates 1 are staggered circumferentially. That is, in the axial projection plane, the line connecting the tip of the pole tooth 11′ to the center of the central hole of the stator assembly 10 forms an angle with the line connecting the tip of the pole tooth 11″ to the center of the central hole of the claw pole plate 1. This angle is α / γ, where α is the step distance, α = 360° / 2β, β is the number of pole teeth, and γ is the number of phases. For example, if β = 12 and γ = 3, then α = 15°. It can be understood that the number of phases and the number of pole teeth of the motor can be determined according to the overall design requirements of the actual product to meet the performance requirements of the motor. This application does not limit this.

[0041] Please see also Figure 4 This figure is a side view showing the relative positional relationship of two opposing claw pole plates 1. The figure exemplifies this by illustrating a pair of pole teeth 11 staggered circumferentially. Corresponding to two adjacent phase coils, Figure 4 The first claw electrode plate 1′ and the second claw electrode plate 1″, which are arranged opposite to each other, are shown in the diagram. The first claw electrode plate 1′ is the claw electrode plate 1 corresponding to one of the phase coils, and the second claw electrode plate 1″ is the claw electrode plate 1 corresponding to the other phase coil. That is, for the two oppositely arranged first claw electrode plates 1′ and second claw electrode plates 1″, the electrode plate bodies 13 of the two are arranged close to each other, and the extension directions of the pole teeth 11 of the two are opposite.

[0042] In specific implementations, the six claw pole plates 1 of the stator assembly 10 have identical structures. For example, but not limited to, they are formed using the same stamping die to reasonably control product design costs and process implementation costs. In related technologies, for the circumferential relative positional relationship between two claw pole plates of each phase winding, and the circumferential relative positional relationship between two claw pole plates arranged opposite each other in adjacent phase windings, the six claw pole plates are placed as inserts in the injection mold, and the positioning connection is achieved through process inserts. The claw pole plate assembly that meets the above requirements for the circumferential relative positional relationship between the claw pole plates is formed by injection molding. However, this method has the drawback of high process implementation costs.

[0043] Based on this, the present application provides a motor assembly in which the phase coils of the stator assembly are sequentially arranged in the cylinder 2. Each phase winding is located between two opposing claw pole plates 1, and at least a portion of the pole teeth 11 of one claw pole plate 1 extends into the tooth groove 12 of the other claw pole plate 1. The two adjacent claw pole plates 1 of the two adjacent phase windings are arranged opposite to each other, and the corresponding pole teeth 11 on the two opposing claw pole plates 1 are staggered in the circumferential direction.

[0044] In this embodiment, a limiting portion 131 is provided on the electrode body 13 of the claw electrode plate 1, and the limiting portion 131 is recessed inward from the outer periphery of the electrode body 13. For each phase winding, the limiting portions 131 on the two oppositely arranged first claw electrode plates 1' and second claw electrode plates 1" are staggered in the axial projection plane; for two adjacent phase windings, the limiting portions 131 on the two oppositely arranged claw electrode plates 1 (the second claw electrode plate 1" of one coil and the first claw electrode plate 1' of the other coil) are coincident in the axial projection plane.

[0045] Correspondingly, the sidewall of the cylinder 2 has γ+1 levels of holes arranged axially, where γ is the number of phases. Specifically, the limiting part 131 is recessed inward from the outer periphery of the electrode body 13, and each level of hole is respectively and at least part of the corresponding limiting part is arranged opposite to it to determine the circumferential relative position of the claw electrode 1 relative to the cylinder 2. Each claw electrode 1 is arranged opposite to the corresponding hole 21 on the sidewall of the cylinder 2 through the limiting part 131, and the limiting part 131 on two claw electrode 1s arranged opposite to each other is adapted to the same hole 21. In this way, the circumferential relative position of each claw electrode 1 relative to the cylinder 2 can be defined respectively, and the relative positional relationship between each claw electrode 1 in the circumferential direction can be guaranteed.

[0046] The limiting portions of the claw pole plates arranged opposite each other in adjacent phase windings are arranged to coincide on the axial projection plane, and the limiting portions and corresponding holes of at least one of the claw pole plates arranged opposite each other in adjacent phase windings are arranged opposite each other. This can also confirm the relative positional relationship between the claw pole plates arranged opposite each other in adjacent phase windings and the cylinder.

[0047] Of course, as another implementation, the limiting part 131 can also be a limiting hole located in the electrode plate body (not shown in the figure). For example, by using an automated installation device to obtain the claw electrode plate, the relative positional relationship of the limiting parts corresponding to the two claw electrode plates of each phase winding is set in the automated device to satisfy the relative positional relationship of the circumferential direction between each claw electrode plate. On the one hand, it can be ensured that at least part of the pole tooth of one of the two claw electrode plates that are oppositely arranged for each phase winding extends into the tooth groove of the other. At the same time, it can be ensured that the corresponding pole teeth on the two claw electrode plates that are oppositely arranged for adjacent phase windings are staggered in the circumferential direction.

[0048] In the above embodiments, the relative positional relationship of each claw pole plate in the circumferential direction can be satisfied. On the one hand, it can ensure that at least part of the pole teeth of one of the two claw pole plates that are oppositely arranged for each phase winding extends into the tooth groove of the other. At the same time, it can ensure that the corresponding pole teeth on the two claw pole plates that are oppositely arranged for adjacent phase windings are staggered in the circumferential direction.

[0049] To satisfy the circumferential limiting of each claw pole plate and the cylinder, the claw pole plates and the cylinder can be limited or fixedly set. In each adjacent phase winding, the two claw pole plates set opposite to each other are respectively limited or fixedly connected to the cylinder; and / or, one of the two claw pole plates set opposite to each other is limited or fixedly connected to the cylinder, and the two claw pole plates set opposite to each other are limited or fixedly connected; of course, it can be fixed by welding or gluing, or by inserting a positioning pin into the limiting part where the two claw pole plates of the two adjacent phase windings are overlapping in the axial projection plane, so as to realize the limiting of the two claw pole plates of the two adjacent phase windings. And it is set such that the side wall of the cylinder, each claw pole plate and the positioning pin are interference fit to realize the limiting setting of each claw pole plate and the side wall of the cylinder.

[0050] The specific number of limiting parts 131 provided on each claw electrode plate 1 can be selected as needed. For example, but not limited to, one, two, or other plurality of limiting parts can be provided on the outer periphery of the electrode plate body 13 of the claw electrode plate 1.

[0051] Please see also Figure 5 and Figure 6 ,in, Figure 5 This is a schematic diagram showing the relative positional relationship of each claw plate 1 of a certain sub-component in an embodiment of this application. Figure 6 This is a top view of the claw electrode plate 1 in Embodiment 1 of this application.

[0052] In this embodiment, an inwardly recessed limiting portion 131 is provided on the outer periphery of the electrode body 13 of the claw electrode plate 1. Figure 6As shown, in the axial projection plane, the line connecting the center of the tooth groove 12 in the circumferential direction with the center of the central hole of the claw plate 1 is taken as the first reference line l1, and the line connecting the center of the limiting part 131 in the circumferential direction with the center of the central hole of the claw plate 1 is taken as the limiting line l. The angle between the limiting line l and the first reference line l1 is δ, where δ = α / 2γ. For example, β = 12, γ = 3, α = 15°, and δ = 2.5°.

[0053] For the six claw pole plates 1 of the three-phase motor stator assembly (γ=3), correspondingly, γ+1 level holes are provided axially on the inner wall surface of the cylinder 2, and four levels of holes are provided on the side wall of the cylinder 2. Please refer to [further details omitted]. Figure 7 and Figure 8 ,in, Figure 7 This is a top sectional view of the cylinder according to an embodiment of this application. Figure 8 for Figure 7 BB section view in the middle.

[0054] It should be noted that the center position of each tooth groove of the claw electrode plate in the circumferential direction must be on a circle with or approximately equal diameter; the center position of the limiting part of each claw electrode plate must be on a circle with or approximately equal diameter.

[0055] A limiting part 131 is provided on the corresponding electrode body 13. Each level of hole includes a hole 21, namely a first level hole 21a, a second level hole 21b, a third level hole 21c, and a fourth level hole 21d.

[0056] In the axial direction, four holes 21 (first-level hole 21a, second-level hole 21b, third-level hole 21c, and fourth-level hole 21d) are arranged sequentially at intervals, and there is a gap between adjacent holes 21 to facilitate the sequential assembly of each claw plate 1. In this way, better assembly processability can be obtained.

[0057] In the axial projection plane, the first-stage hole 21a, the second-stage hole 21b, the third-stage hole 21c, and the fourth-stage hole 21d are arranged sequentially at equal intervals on the side wall of the cylinder 2 in the circumferential direction. That is, the angle between the line connecting the center of each adjacent first-stage hole 21a, second-stage hole 21b, third-stage hole 21c, and fourth-stage hole 21d to the center of the central hole of the claw pole plate 1 is θ, where θ = (α - α / γ) + 2N*α or θ = (α + α / γ) + 2N*α, and N is 0 or a natural number. For example, N = 0, β = 12, γ = 3, α = 15°, θ = 20° or θ = 10°.

[0058] It should be noted that the center position of each level of hole must be on a circle of equal or approximately equal diameter on the axial projection plane.

[0059] In this embodiment, the limiting portions 131 on the claw pole plates 1 located at both ends are respectively opposite to a hole portion 21. The four claw pole plates 1 located in the middle are arranged back to back in pairs, and the limiting portions 131 of the two claw pole plates 1 arranged back to back are axially aligned and can be opposite to the same hole portion 21 to determine and confirm the circumferential positional relationship between the two claw pole plates arranged back to back and the cylinder. Specifically, the limiting portion 131 on the first claw pole plate 1′ corresponding to the first winding A is opposite to the first-stage hole portion 21a; the two limiting portions 131 on the second claw pole plate 1″ corresponding to the first winding A and the first claw pole plate 1′ corresponding to the second winding B are together opposite to the second-stage hole portion 21b; the two limiting portions 131 on the second claw pole plate 1″ corresponding to the second winding B and the first claw pole plate 1′ corresponding to the third winding C are together opposite to the third-stage hole portion 21c; the limiting portion 131 on the second claw pole plate 1″ corresponding to the third winding is opposite to the fourth-stage hole portion 21d.

[0060] In this way, by utilizing the relatively arranged limiting parts and holes, and through the layout of each hole on the inner wall of the cylinder, the circumferential positional relationship that meets the functional requirements of the motor can be achieved for each claw pole plate 1 based on the same structure. Please refer to [link / reference needed]. Figure 9 The image is Figure 5 The top view shows that, as a whole, it ensures that the pole teeth 11 of one of the two claw pole plates 1, which are arranged opposite to each phase winding, are inserted into the tooth groove 12 of the other, while ensuring that the corresponding pole teeth 11 on the two claw pole plates 1 arranged opposite to each other are staggered in the circumferential direction, effectively reducing product setup costs and process implementation costs.

[0061] It should be noted that the identical structure of each claw pole plate 1 means that the pole teeth and the limiting parts used for assembly positioning of each claw pole plate 1 are the same in size and shape, and the relative positional relationship is the same. For example, the pole teeth 11 of each phase winding claw pole plate 1 are the same, the limiting parts 131 of each phase winding claw pole plate 1 are the same, and the relative positional relationship between the limiting parts 131 and the pole teeth 11 is the same. At the same time, this includes the case where the pole plate body is completely identical, as well as the case where the pole plate body is provided with other structures to adapt to process conditions, etc.

[0062] Of course, one of the limiting parts of the two opposing claw plates can be aligned with the hole to determine the circumferential position of one claw plate. The limiting parts 131 of the two opposing claw plates 1 are axially aligned, which can confirm the circumferential position of the two opposing claw plates and the cylinder.

[0063] Alternatively, in the implementation of providing a limiting part 131 on the outer periphery of the electrode body 13 of the claw electrode plate 1, the line connecting the center position of the electrode tooth in the circumferential direction to the center of the center hole of the claw electrode plate can also be used as a reference line. Please refer to Figure 11This figure is a top view of the claw electrode plate according to Embodiment 2 of this application. In order to clearly show the differences and connections between the embodiments, the same functional components and structures are illustrated with the same reference numerals in the figure.

[0064] Combination Figure 11 As shown, in the axial projection plane, the line connecting the center of the pole tooth 11 in the circumferential direction with the center of the central hole of the claw pole plate 1 is taken as the second reference line l2, and the line connecting the center of the limiting part 131 in the circumferential direction with the center of the central hole of the claw pole plate 1 is taken as the limiting line l. The angle between the limiting line l and the second reference line l2 is δ, where δ = α / 2γ.

[0065] Similarly, based on Figure 7 and Figure 8 The layout of each hole 21 on the side wall of the cylinder 2, as described, can also achieve the circumferential position that meets the functional requirements of the motor for each claw pole plate 1 based on the same structure.

[0066] Other components and connections can be the same as in Embodiment 1 above. They will not be repeated here.

[0067] The claw electrode plates described in Embodiments 1 and 2 above are each provided with a limiting part. In other specific implementations, for each claw electrode plate 1, two limiting parts 131 may also be provided on its electrode plate body 13. Specifically, two inwardly recessed limiting parts 131 are provided on the outer periphery of the electrode plate body 13. Please refer to [further details omitted]. Figure 12 and Figure 13 ,in, Figure 12 This is a schematic diagram showing the relative positions of the claw poles of the stator assembly in Embodiment 3 of this application. Figure 13 This is a top view of the claw electrode plate according to Embodiment 3 of this application. To clearly show the differences and relationships between the embodiments, configurations and structures with the same function are indicated by the same reference numerals in the figure.

[0068] like Figure 12 As shown, each claw electrode plate 1 has two limiting portions 131 on its outer periphery. Figure 13 As shown, in the axial projection plane, the line connecting the center of the pole tooth 11 in the circumferential direction with the center of the central hole of the claw pole plate 1 is taken as the second reference line l2, and the line connecting the center of the two limiting parts 131 in the circumferential direction with the center of the central hole of the claw pole plate 1 is taken as the limiting line l. The angle between the second reference line l2 and the limiting line l that is close to it in the circumferential direction is δ1, and the angle between the two limiting lines l is δ2. Furthermore, 2δ1+δ2=2N*α±α / γ, where 0≤δ1≤2α, and N is 0 or a natural number.

[0069] In other possible implementations, the limiting lines l corresponding to the two limiting parts 131 can also be designed in such a way that the angle between the first reference line l1 and the limiting line l approaching in the circumferential direction is δ1 (not shown in the figure), and the angle between the two limiting lines l is δ2. Similarly, 2δ1+δ2=2N*α±α / γ, where 0≤δ1≤2α, and N is 0 or a natural number.

[0070] Correspondingly, γ+1 level holes are provided along the axial direction on the side wall of cylinder 2, and four levels of holes are provided on the side wall of cylinder 2. Please refer to [the document for further details]. Figure 14 and Figure 15 ,in, Figure 14 This is a top sectional view of the cylinder in Embodiment 3 of this application. Figure 15 for Figure 14 GG section view in the image.

[0071] The corresponding electrode body 13 has two limiting parts 131. Each level of hole includes two holes 21, namely two first-level holes 21a, two second-level holes 21b, two third-level holes 21c and two fourth-level holes 21d.

[0072] Similarly, in the axial direction, the holes 21 of each level (two first-level holes 21a, two second-level holes 21b, two third-level holes 21c, and two fourth-level holes 21d) are arranged sequentially at intervals, and as shown... Figure 15 The two adjacent holes 21 shown have a distance between them.

[0073] like Figure 14 As shown, in the axial projection plane, the holes 21 of each level are arranged at equal intervals on the inner wall of the cylinder 2 in the circumferential direction. The two first-level holes 21a, the two second-level holes 21b, the two third-level holes 21c and the two fourth-level holes 21d are arranged in a one-to-one correspondence. The angle between the line connecting the corresponding holes in two adjacent levels and the center of the claw plate 1 at the center position in the circumferential direction is θ, where θ = (α-α / γ) + 2N*α or θ = (α+α / γ)2N*α, and N is 0 or a natural number.

[0074] A method for assembling a motor assembly includes the following steps:

[0075] A claw electrode plate is provided, the claw electrode plate including a limiting part;

[0076] Provide positioning agency 003;

[0077] Assemble at least one phase winding, the winding including a first claw pole plate, a coil and a second claw pole plate, and install the first claw pole plate, the coil and the second claw pole plate of at least one phase winding in sequence. Use a positioning mechanism to make the limiting part of the first claw pole plate and the limiting part of the second claw pole plate circumferentially offset in the axial projection plane. In the axial projection plane, at least a portion of the pole tooth of one claw pole plate of the winding extends into the tooth groove of the other claw pole plate.

[0078] Assemble two opposing claw pole plates of two adjacent phase windings. Use a positioning mechanism to make the limiting parts of the two opposing claw pole plates face each other in the circumferential direction in the axial projection plane, so that the limiting parts of the two opposing claw pole plates of the two adjacent phase windings coincide and the pole teeth of the two opposing claw pole plates of the two adjacent phase windings are staggered in the circumferential direction.

[0079] This motor assembly method utilizes a positioning mechanism to offset the limiting portions of the first and second claw pole plates circumferentially within the axial projection plane. Within the axial projection plane, at least a portion of the pole teeth of one claw pole plate of the winding extends into the tooth groove of the other claw pole plate. The positioning mechanism also positions the limiting portions of the two opposing claw pole plates circumferentially relative to each other within the axial projection plane, ensuring that the limiting portions of the two opposing claw pole plates of adjacent phase windings coincide, and the pole teeth of the two opposing claw pole plates of adjacent phase windings are circumferentially offset. By staggering the positions of the claw pole plates, the relative circumferential positions of each claw pole plate are satisfied. On the one hand, this ensures that at least a portion of the pole teeth of one of the two claw pole plates corresponding to each phase winding extends into the tooth groove of the other. On the other hand, it ensures that the corresponding pole teeth on the two claw pole plates of adjacent phase windings that are set opposite to each other are staggered in the circumferential direction. This provides circumferential positioning for each claw pole plate to meet the functional requirements of the motor, and limits the relative circumferential position of each claw pole plate relative to the cylinder. Overall, this can effectively reduce product setup costs and process implementation costs.

[0080] The following is combined Figure 10 Detailed description Figure 1 The assembly method of the motor stator assembly shown is illustrated.

[0081] In one embodiment, the method for assembling the stator assembly includes the following steps:

[0082] In the insertion direction, the winding furthest from the insertion end is the first winding A, and the winding closest to the insertion end is the γ winding (the third winding C).

[0083] Step S101: At least a portion of the positioning mechanism 003 is inserted from the outside of the cylinder into the inside of the cylinder through the corresponding hole of the corresponding hole; the first claw plate 1′ of the first winding A is placed in the cylinder 2 and assembled in place along the insertion path P1 shown by the arrow in the figure, so that the positioning mechanism limits the first claw plate circumferentially, and after fixing the first claw plate 1′ and the cylinder, the coil of the first winding A (not shown in the figure) is installed.

[0084] Specifically, the positioning mechanism can be a positioning pin, and the limiting part is recessed inward along the outer periphery of the first claw electrode plate. First, at least part of the positioning pin is inserted into the inside of the cylinder from the outside of the cylinder through the hole corresponding to the first-stage hole 21a. Then, the first claw electrode plate 1' is placed in the cylinder. The first claw electrode plate is rotated so that at least part of the positioning pin is located in the recessed area of ​​the limiting part in the axial projection plane. Then, the first claw electrode plate is moved along the insertion direction until the positioning pin and the limiting part of the first claw electrode plate cooperate. After the positioning pin limits the first claw electrode plate circumferentially, the first claw electrode plate and the cylinder are fixed by welding or adhesive. Then, the coil of the first winding A (not shown in the figure) is installed.

[0085] Step S102: At least part of the positioning mechanism is inserted into the interior of the cylinder from the outside of the cylinder through the corresponding hole of the corresponding hole; the second claw pole plate 1" of the first winding A is placed in the cylinder 2 and assembled in place along the insertion path P2 shown by the arrow in the figure, so that the positioning mechanism axially limits the second claw pole plate.

[0086] Similarly, the positioning mechanism can be a positioning pin, and the limiting part is recessed inward along the outer periphery of the electrode body of the second claw electrode plate. First, at least part of the positioning pin is inserted into the interior of the cylinder from the outside of the cylinder through the hole corresponding to the second-stage hole 21b. Then, the second claw electrode plate is placed in the cylinder and rotated so that at least part of the positioning pin is located in the recessed area of ​​the limiting part in the axial projection plane. Then, the second claw electrode plate is moved along the insertion direction until the positioning pin and the limiting part of the second claw electrode plate are engaged.

[0087] Step S103: Place the first claw pole plate 1′ of the second winding B into the cylinder 2 and assemble it into place along the insertion path P3 shown by the arrow in the figure, defining the relative positions of the second claw pole plate of the first winding A, the first claw pole plate of the second winding B and the cylinder, and install the coil of the second winding B (not shown in the figure).

[0088] Similarly, the limiting part is recessed inward on the outer periphery of the electrode body of the first claw electrode plate. First, the first claw electrode plate is placed in the cylinder and rotated so that at least part of the positioning pin in S102 is located in the recessed area of ​​the limiting part in the axial projection plane. Then, the first claw electrode plate is moved along the insertion direction until the positioning pin in step S102 and the limiting part of the first claw electrode plate cooperate. After the positioning pin limits the first claw electrode plate circumferentially, the positioning pin is removed. At the second-stage hole 21b, the second claw electrode plate of the first winding A and the first claw electrode plate of the second winding B are fixed to the cylinder by welding or gluing.

[0089] Of course, other parts of the second claw pole plate of the first winding A and the first claw pole plate of the second winding B can also be selected as welding positions, such as at the abutment gap of the pole teeth of the two claw pole plates, and on the side of the two claw pole plates near the insertion end, that is, at the connection seam between the first claw pole plate of the second winding B and the cylinder, to fix the first claw pole plate of the second winding B and the cylinder.

[0090] In step S104, at least a portion of the positioning mechanism is inserted from the outside of the cylinder through the corresponding hole of the corresponding hole into the inside of the cylinder. The second claw pole plate 1" of the second winding B is placed in the cylinder 2 and assembled in place along the insertion path P4 shown by the arrow in the figure, so that the positioning mechanism limits the second claw pole plate circumferentially.

[0091] Specifically, the positioning mechanism can be a positioning pin, and the limiting part is recessed inward along the outer periphery of the electrode body of the second claw electrode plate. First, at least part of the positioning pin is inserted into the inside of the cylinder from the outside of the cylinder through the hole corresponding to the third-stage hole 21c. Then, the second claw electrode plate is placed in the cylinder and rotated so that at least part of the positioning pin is located in the recessed area of ​​the limiting part in the axial projection plane. Then, the second claw electrode plate is moved along the insertion direction until the positioning pin and the limiting part of the second claw electrode plate are engaged, and the positioning pin limits the second claw electrode plate circumferentially.

[0092] Step S105: Place the first claw plate 1′ of the third winding C into the cylinder 2 and assemble it into place along the insertion path P5 shown by the arrow in the figure. Define the relative positions of the second claw plate of the second winding B, the first claw plate of the third winding, and the cylinder. Install the coil of the third winding C (not shown in the figure).

[0093] Specifically, the limiting part is recessed inward on the outer periphery of the electrode body of the first claw electrode plate. First, the first claw electrode plate is placed in the cylinder and rotated so that at least part of the positioning pin in S104 is located in the recessed area of ​​the limiting part in the axial projection plane. Then, the first claw electrode plate is moved along the insertion direction until the positioning pin in step S104 and the limiting part of the first claw electrode plate cooperate. After the positioning pin limits the first claw electrode plate circumferentially, the positioning pin is removed. At the third-stage hole 21c, the second claw electrode plate of the second winding B and the first claw electrode plate of the third winding C are fixed to the cylinder by welding or adhesive.

[0094] Alternatively, other parts of the second claw plate of the second winding B and the first claw plate of the third winding C can be selected as welding positions. For example, at the abutment gap of the pole teeth of the two claw plates, and on the side of the two claw plates near the insertion end, that is, at the connection seam between the first claw plate of the third winding C and the cylinder, the first claw plate of the third winding C and the cylinder can be fixed; the coil of the third winding C (not shown in the figure) can be installed.

[0095] In step S106, at least a portion of the positioning mechanism is inserted from the outside of the cylinder through the corresponding hole of the corresponding hole into the inside of the cylinder. The second claw pole plate 1" of the third winding C is placed in the cylinder 2 and assembled in place along the insertion path P6 shown by the arrow in the figure, so that the positioning mechanism limits the second claw pole plate circumferentially and fixes the second claw pole plate 1" of the third winding C and the cylinder.

[0096] Specifically, the positioning mechanism can be a positioning pin, and the limiting part is recessed inward along the outer periphery of the electrode body of the second claw electrode plate. First, at least part of the positioning pin is inserted into the interior of the cylinder through the corresponding hole of the fourth-stage hole 21 from the outside of the cylinder. Then, the second claw electrode plate is placed in the cylinder and rotated so that at least part of the positioning pin is located in the recessed area of ​​the limiting part in the axial projection plane. Then, the second claw electrode plate is moved along the insertion direction until the positioning pin and the limiting part of the second claw electrode plate are engaged. The positioning pin limits the second claw electrode plate circumferentially. The second claw electrode plate of the third winding C and the cylinder are fixed by welding or gluing.

[0097] Alternatively, the positioning mechanism can be a mechanism (not shown in the figure) for automated production equipment, which may include a robotic arm.

[0098] In the insertion direction, the winding away from the insertion end is the first winding A, and the winding closer to the insertion end is the γ winding (the third winding C). The γ+1 group of electrode bodies, each phase electrode body is of a different level, and the two electrode bodies of adjacent phases that are set opposite to each other are of the same level. γ is the number of phases.

[0099] Step S101: The positioning mechanism obtains the first claw plate 1' of the first winding A and places it in the first position in the cylinder 2; fixes the first claw plate and the cylinder, and installs the coil of the first winding A.

[0100] In step S102, the positioning mechanism acquires the second claw pole plate 1” of the first winding A and places it in the second position in the cylinder 2. In the axial projection plane, the limiting part of the first claw pole plate 1′ and the limiting part of the second claw pole plate 1” of the first winding A are offset in the circumferential direction. In the first claw pole plate 1′ and the second claw pole plate 1”, at least a portion of the pole tooth of one claw pole plate extends into the tooth groove of the other claw pole plate; the second claw pole plate 1” and the cylinder are fixed.

[0101] In step S103, the positioning mechanism acquires the first claw pole plate 1′ of the second winding B and places it in the third position in the cylinder 2. In the axial projection plane, the limiting parts of the second claw pole plate of the first winding A and the first claw pole plate of the second winding B are overlapped in the axial projection plane, and the pole teeth of the two claw pole plates are staggered in the circumferential direction. The first claw pole plate 1′ of the second winding B and the second claw pole plate 1″ of the first winding A are fixed, and / or the first claw pole plate 1′ of the second winding B and the cylinder are fixed. The coil of the second winding B is installed.

[0102] In step S104, the positioning mechanism acquires the second claw pole plate 1” of the second winding B and places it in the fourth position in the cylinder 2. In the axial projection plane, the limiting part of the second claw pole plate 1” of the second winding B and the limiting part of the first claw pole plate 1′ of the second winding B are offset in the circumferential direction. In the second claw pole plate 1” and the first claw pole plate 1′, at least a portion of the pole tooth of one claw pole plate extends into the tooth groove of the other claw pole plate; the second claw pole plate 1” of the second winding B and the cylinder are fixed.

[0103] Step S105: The positioning mechanism acquires the first claw pole plate 1′ of the third winding C and places it in the fifth position in the cylinder 2. The limiting part of the first claw pole plate 1′ of the third winding C and the limiting part of the second claw pole plate 1″ of the second winding B are coincidentally arranged in the axial projection plane, and the pole teeth of the two claw pole plates are staggered in the circumferential direction; the first claw pole plate 1′ of the third winding C and the second claw pole plate of the second winding B are fixed, and / or the first claw pole plate 1′ of the third winding C and the cylinder; the coil of the third winding C is installed.

[0104] In step S106, the positioning mechanism acquires the second claw pole plate 1” of the third winding C and places it in the sixth position in the cylinder 2. In the axial projection plane, the limiting part of the second claw pole plate 1” of the third winding C and the limiting part of the first claw pole plate 1′ of the third winding C are offset in the circumferential direction. In the second claw pole plate 1” and the first claw pole plate 1′, at least a portion of the pole tooth of one claw pole plate extends into the tooth groove of the other claw pole plate; the second claw pole plate 1” of the third winding C and the cylinder are fixed.

[0105] Specifically, the claw electrode plate and the cylinder can be fixed by welding or gluing. The first position, second position, third position, fourth position, fifth position and sixth position are the six positions recorded by the automated production equipment system, and satisfy the following: in the axial projection plane, the line connecting the center position of the two adjacent limiting parts in the circumferential direction with the center of the center hole of the claw electrode plate has an angle θ, and θ=(α-α / γ)+2N*α or θ=(α+α / γ)+2N*α, where α is the step distance, α=360° / 2β, β is the number of pole teeth, and N is 0 or a natural number.

Claims

1. A motor assembly, characterized in that, The stator assembly (10) includes a cylinder (2) and a multiphase winding disposed within the cylinder (2); the coil of each phase winding is located between two opposing claw pole plates (1), the pole teeth of the two claw pole plates (1) extend toward each other from their respective pole plate bodies (13), and at least a portion of the pole tooth (11) of one claw pole plate (1) extends into the tooth groove (12) of the other claw pole plate (1); The two adjacent claw pole plates (1) of the two adjacent phase windings are arranged back to back, and the pole teeth (11) of the two claw pole plates (1) arranged back to back are staggered in the circumferential direction; A limiting part is provided on the plate body (13) of the claw plate (1); in the axial projection plane, the limiting parts (131) of the two claw plates (1) of each phase winding are staggered, and the limiting parts (131) of the two opposing claw plates (1) of the two adjacent phase windings are overlapped. Along the axial direction of the cylinder (2), the claw plates (1) at both ends and the cylinder (2) are limited or fixedly connected; In each adjacent phase winding, the two claw pole plates (1) arranged in opposite directions are respectively limited or fixedly connected to the cylinder (2); or, one of the two claw pole plates (1) arranged in opposite directions is limited or fixedly connected to the cylinder (2), and the two claw pole plates (1) arranged in opposite directions are limited or fixedly connected.

2. The motor assembly according to claim 1, characterized in that, The pole teeth (11) of the claw pole plates (1) of each phase winding are the same, and the limiting portion (131) of the claw pole plates (1) of each phase winding is the same, and the relative positional relationship between the limiting portion (131) and the pole teeth (11) is the same.

3. The motor assembly according to claim 2, characterized in that, The limiting part (131) is recessed inward from the outer periphery of the electrode plate body (13), and the side wall of the cylinder (2) is provided with γ+1 level holes (21), where γ is the number of phases; each level of hole (21) is respectively arranged opposite to at least part of the corresponding limiting part (131).

4. The motor assembly according to claim 3, characterized in that, In the axial projection plane, the line connecting the center of the central hole of the claw pole plate (1) at the center position of the two adjacent holes (21) in the circumferential direction has an angle θ, and θ=(α-α / γ)+2N*α or θ=(α+α / γ)+2N*α, where α is the step distance, α=360° / 2β, β is the number of pole teeth, and N is 0 or a natural number.

5. The motor assembly according to claim 4, characterized in that, In the axial projection plane, the holes (21) of each level are arranged in the cylinder (2) at equal intervals in the circumferential direction.

6. The motor assembly according to any one of claims 1 to 3, characterized in that, Each of the claw plates (1) is provided with a limiting part; In the axial projection plane, the line connecting the center of the tooth groove (12) in the circumferential direction with the center of the central hole of the claw pole plate (1) is the first reference line (l1); the line connecting the center of the pole tooth (11) in the circumferential direction with the center of the central hole of the claw pole plate (1) is the second reference line (l2); the line connecting the center of the limiting part (131) in the circumferential direction with the center of the central hole of the claw pole plate (1) is the limiting line (l); The limiting line (l) has an angle δ with the first reference line (l1), or the limiting line (l) has an angle δ with the second reference line (l2), where δ = α / 2γ.

7. The motor assembly according to any one of claims 1-3, characterized in that, The claw electrode plate (1) is provided with two limiting parts (131); In the axial projection plane, the line connecting the center of the tooth groove (12) in the circumferential direction with the center of the central hole of the claw pole plate (1) is the first reference line (l1); the line connecting the center of the pole tooth (11) in the circumferential direction with the center of the central hole of the claw pole plate (1) is the second reference line (l2); the line connecting the center of the two limiting recesses (131) in the circumferential direction with the center of the central hole of the claw pole plate (1) is the limiting line (l), and the included angle of the two limiting lines (l) is δ2; The second reference line (l2) has an angle δ1 with the limiting line (l) that is close to it in the circumferential direction, or the first reference line (l1) has an angle δ1 with the limiting line (l) that is close to it in the circumferential direction; Furthermore, 2δ1+δ2=2N*α±α / γ, where 0≤δ1≤2α, and N is 0 or a natural number.

8. A method for assembling a motor assembly, characterized in that, Includes the following steps: A claw electrode plate is provided, the claw electrode plate including a limiting portion; Provide positioning services; Assemble at least one phase winding, the winding including a first claw pole plate, a coil and a second claw pole plate, and install the first claw pole plate, the coil and the second claw pole plate of the at least one phase winding in sequence, and use the positioning mechanism to make the limiting part of the first claw pole plate and the limiting part of the second claw pole plate circumferentially offset in the axial projection plane; In the axial projection plane, at least a portion of the pole tooth (11) of one of the claw pole plates (1) of the winding extends into the tooth groove (12) of the other claw pole plate (1); Assemble two opposing claw pole plates of two adjacent phase windings, and use the positioning mechanism to make the limiting parts (131) of the two opposing claw pole plates (1) of the two adjacent phase windings coincide in the axial projection plane, and the pole teeth (11) of the two opposing claw pole plates (1) of the two adjacent phase windings are staggered in the circumferential direction.

9. The method for assembling a motor assembly according to claim 8, characterized in that, Includes the following steps: A claw electrode plate is provided, the claw electrode plate including an electrode plate body, and the limiting portion is recessed inward from the outer periphery of the electrode plate body; A cylindrical body is provided, the sidewall of which has a plurality of holes (21); The steps for coordinating the positioning mechanism and the limiting part include: Place the claw electrode plate inside the cylinder; At least a portion of the positioning mechanism extends from the outside of the cylinder through the corresponding hole of the hole portion into the inside of the cylinder. The portion of the positioning mechanism placed inside the cylinder is defined as the first portion. At least a portion of the first part is inserted into the recessed area of ​​the limiting part, such that the positioning mechanism restricts the circumferential position of the claw plate.

10. The method for assembling a motor assembly according to claim 9, characterized in that, Includes the following steps: The steps of coordinating the positioning mechanism and the limiting part include: Rotate the claw electrode plate circumferentially so that the limiting portion of the claw electrode plate and the first portion are axially aligned, and move the claw electrode plate axially so that at least part of the limiting portion and the first portion are engaged.

11. The method for assembling a motor assembly according to claim 8, characterized in that, Includes the following steps: Provide cylinder; The steps for assembling at least one phase winding include: The positioning mechanism acquires the first claw electrode plate and places the first claw electrode plate at a first position on the cylinder, where the first position is the relative position of the first claw electrode plate and the cylinder. The positioning mechanism acquires the second claw plate and places the second claw plate in the second position of the cylinder. The second position of the positioning mechanism is the relative position of the second claw plate and the cylinder, so that the first claw plate; Fix or limit the first claw plate and the cylinder.

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