Motor and assembling method thereof

Abstract

The invention discloses a motor and an assembling method thereof, the motor comprises a stator assembly, each winding coil of the stator assembly is located between two claw pole plates which are oppositely arranged, the outer periphery of a pole plate body of each claw pole plate is provided with a limiting concave part, and the inner side wall of a cylinder is provided with a limiting convex part matched with the limiting concave part; and the claw pole plates and the corresponding limiting convex parts form a circumferential limiting pair through the limiting concave parts. Therefore, the circumferential relative position of each claw pole plate relative to the cylinder body can be respectively limited, the 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] The present application relates to the motor technical field, specifically relates to a motor and an assembling method thereof. BACKGROUND

[0002] The coil of the motor is arranged outside the pole teeth of two oppositely arranged claw pole plates, and the pole teeth of one claw pole plate are inserted between the two pole teeth of the other claw pole plate. Meanwhile, the corresponding pole teeth of the two claw pole plates of adjacent two phases have a certain included angle in the circumferential direction to meet the performance requirements of the motor.

[0003] Taking a three-phase motor as an example, the related art places six claw pole plates as inserts in an injection mold, and connects the inserts by a process to form a claw pole plate assembly meeting the circumferential relative position relationship requirements between the claw pole plates, and then places the claw pole plate assembly in a metal sleeve to assemble the motor.

[0004] However, the process of connecting the inserts to limit the relative positions between the claw pole plates requires a separate development of an injection mold, which is complex and has a high cost. SUMMARY

[0005] To solve the above technical problems, the present application provides a motor and an assembling method thereof, which effectively reduces the manufacturing cost while meeting the relative position relationship between the claw pole plates.

[0006] The present application provides a motor, comprising a stator assembly, the stator assembly comprising a cylinder and a plurality of phase windings stacked in the cylinder; the coils of each phase winding are located between two oppositely arranged claw pole plates, the pole teeth of the two claw pole plates extend from the respective pole plate bodies towards each other, and the pole teeth of one claw pole plate are inserted into the tooth groove of the other claw pole plate; the two adjacent claw pole plates of adjacent two phase windings are oppositely arranged, and the pole teeth of the oppositely arranged two claw pole plates are circumferentially staggered; a limiting recess is formed along the outer periphery of the pole plate body of the claw pole plate, and the inner side wall of the cylinder has a limiting protrusion corresponding to the limiting recess, and the claw pole plate is constructed to form a circumferential limiting pair by the limiting recess and the corresponding limiting protrusion; in the axial projection plane, the limiting recesses of the two claw pole plates of each phase winding are staggered, the limiting recesses of the oppositely arranged claw pole plates of adjacent two phase windings are coincidentally arranged, and are adapted to the same limiting protrusion.

[0007] The application further provides an electric machine assembling method, which comprises assembling a stator assembly, wherein the stator assembly comprises a cylinder and a plurality of phase windings stacked in the cylinder in sequence; the coils of each phase winding are located between two oppositely arranged claw pole plates, i.e. a first claw pole plate and a second claw pole plate; a limiting recess is formed in the outer periphery of the pole plate body of the claw pole plate, and the inner side wall of the cylinder has a limiting protrusion matched with the limiting recess; the claw pole plate and the corresponding limiting protrusion form a circumferential limiting pair through the limiting recess; the assembling of the stator assembly comprises sequentially placing the first claw pole plate, the coil and the second claw pole plate of each winding into the cylinder, and limiting the circumferential relative position of each claw pole plate through the matched limiting recess and limiting protrusion.

[0008] The above technical solution forms a circumferential limiting pair through the limiting recess and the corresponding limiting protrusion; the limiting protrusion arranged circumferentially on the inner wall of the cylinder can provide circumferential positioning of each claw pole plate to meet the functional requirements of the electric machine, and the circumferential relative position of each claw pole plate relative to the cylinder is limited. On the one hand, the teeth of one of the two oppositely arranged claw pole plates corresponding to each phase winding can be inserted into the tooth slot of the other claw pole plate, and on the other hand, the corresponding teeth on the two oppositely arranged claw pole plates can be arranged circumferentially staggered. Overall, the product setting cost and the process implementation cost can be effectively reduced. BRIEF DESCRIPTION OF DRAWINGS

[0009] Figure 1 It is a schematic view of the overall structure of the stator assembly of the electric machine according to Embodiment One of the application.

[0010] Figure 2 It is a top view of Figure 1 .

[0011] Figure 3 It is an A-A sectional view of Figure 2 .

[0012] Figure 4 It is a side view of the relative position relationship of the two oppositely arranged claw pole plates.

[0013] Figure 5 It is a schematic view of the relative position relationship of the claw pole plates of the stator assembly according to Embodiment One of the application.

[0014] Figure 6 It is a top view of the claw pole plate according to Embodiment One of the application.

[0015] Figure 7 It is a top sectional view of the cylinder according to Embodiment One of the application.

[0016] Figure 8 It is a B-B sectional view of Figure 7 .

[0017] Figure 9 Fig. 1 is a perspective view of a claw-pole motor according to an embodiment of the present application; Figure 5

[0018] Figure 10 Fig. 2 is an enlarged view of part E in Fig. 1; Figure 3

[0019] Figure 11 Fig. 3 is an enlarged view of part F in Fig. 1; Figure 3

[0020] Figure 12 Fig. 4 is a flow chart of an assembly method of a motor stator assembly shown in Fig. 1; Figure 1

[0021] Figure 13 Fig. 5 is a top view of a claw-pole plate according to an embodiment of the present application;

[0022] Figure 14 Fig. 6 is a schematic view of relative position relationship of claw-pole plates of a stator assembly according to an embodiment of the present application;

[0023] Figure 15 Fig. 7 is a top view of a claw-pole plate according to an embodiment of the present application;

[0024] Figure 16 Fig. 8 is a top sectional view of a cylinder according to an embodiment of the present application;

[0025] Figure 17 Fig. 9 is a sectional view of part G-G in Fig. 8; Figure 16

[0026] Fig. 10 is a schematic view of relative position relationship of claw-pole plates of a stator assembly according to an embodiment of the present application; Figure 18

[0027] Fig. 11 is a top view of a claw-pole plate according to an embodiment of the present application; Figure 19

[0028] Fig. 12 is a top sectional view of a cylinder according to an embodiment of the present application; Figure 20

[0029] Fig. 13 is a sectional view of part H-H in Fig. 12. Figure 21 Figure 20 Fig. 14 is a sectional view of part I-I in Fig. 1;

[0030] Fig. 15 is a sectional view of part J-J in Fig. 1;

[0031] 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 slot 12, pole plate body 13, limiting recess 131, cylinder 2, limiting protrusion 21, first-stage limiting protrusion 21a, second-stage limiting protrusion 21b, third-stage limiting protrusion 21c, fourth-stage limiting protrusion 21d, axial limiting portion 22; ​​​​​

[0032] First winding A, second winding B, third winding C. Detailed Implementation

[0033] 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.

[0034] 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 described in Embodiment 1 of this application. Figure 2 for Figure 1 Top view, Figure 3 for Figure 2 AA sectional view.

[0035] It should be noted that this invention describes the stator assembly structure of a specific motor, aiming to improve the fitting structure between the electronic claw plate and the cylinder adapter. For other components of the motor, 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 scenarios. The descriptions of the coils, rotor, and other components in this embodiment are merely for understanding the basic working principle of the motor and do not constitute substantial limitations.

[0036] 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 stacked sequentially 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.

[0037] Two claw pole plates 1 are arranged opposite each other for each phase winding, with the pole teeth 11 of one claw pole plate 1 inserted into the tooth grooves 12 of the other claw pole plate 1. That is, the pole teeth 11 on the first claw pole plate 1′ and the pole teeth 11 on the second claw pole plate 1″ are arranged alternately in the circumferential direction.

[0038] The two adjacent claw pole plates 1 of the adjacent two phase windings are oppositely arranged, and the corresponding pole teeth 11 on the oppositely arranged two claw pole plates 1 are circumferentially staggered. That is, in the axial projection plane, the line connecting the tooth tip of the pole tooth 11' to the center of the hole of the stator assembly 10 and the line connecting the tooth tip of the pole tooth 11'' to the center of the hole of the claw pole plate 1 have an included angle, and the included 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, β = 12, γ = 3, and 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 needs of the motor. The embodiments of the present application are not limited.

[0039] Please see Figure 4 , which is a side view of the relative position relationship of the oppositely arranged two claw pole plates 1. The figure exemplarily shows a pair of pole teeth 11 staggered in the circumferential direction. Corresponding to the two adjacent phase coils, Figure 4 The first claw pole plate 1' and the second claw pole plate 1'' oppositely arranged as shown in the figure are the claw pole plate 1 corresponding to one of the phase coils and the claw pole plate 1 corresponding to the other phase coil. That is, for the oppositely arranged first claw pole plate 1' and second claw pole plate 1'', the pole plate bodies 13 thereof are arranged close to each other, and the extension directions of the pole teeth 11 thereof are opposite.

[0040] In a specific implementation, the six claw pole plates 1 of the stator assembly 10 are the same in structure. For example, but not limited to, the same stamping die is used for forming to reasonably control the product design cost and the process implementation cost. In the related art, for the circumferential relative position relationship between the two claw pole plates of each phase winding and the circumferential relative position relationship between the oppositely arranged two claw pole plates of the adjacent two phase windings, the six claw pole plates are placed as inserts in an injection mold, and the positioning connection is realized by a process insert. The claw pole plate assembly meeting the circumferential relative position relationship requirements between the claw pole plates is formed by using an injection molding process, which has the defect of high process implementation cost.

[0041] Based on this, the embodiments of the present application provide an electric motor, wherein the phase coils of the stator assembly of the electric motor are sequentially stacked in a cylinder 2, each phase winding is located between two oppositely arranged claw pole plates 1, and the pole teeth 11 of one of the two oppositely arranged claw pole plates 1 are inserted into the tooth groove 12 of the other claw pole plate 1; the two adjacent claw pole plates 1 of the adjacent two phase windings are oppositely arranged, and the corresponding pole teeth 11 on the oppositely arranged two claw pole plates 1 are circumferentially staggered.

[0042] In the embodiment, a limiting recess 131 is formed on the outer periphery of the pole body 13 of the claw pole plate 1. Corresponding to each phase winding, the limiting recesses 131 on the oppositely arranged first claw pole plate 1' and second claw pole plate 1'' are arranged staggered in the axial projection plane; corresponding to two adjacent phase windings, the limiting recesses 131 on the oppositely arranged claw pole plates 1 (one of which is the second claw pole plate 1'' of one coil and the other of which is the first claw pole plate 1' of another coil) are arranged coincident in the axial projection plane.

[0043] Correspondingly, the inner side wall of the cylinder 2 has a limiting protrusion 21 matched with the limiting recess 131, and the matched limiting recess 131 and limiting protrusion 21 form a circumferential limiting pair to limit the circumferential relative position of the claw pole plate 1 relative to the cylinder 2. The limiting recess 131 on each claw pole plate 1 is matched with the corresponding limiting protrusion 21 on the inner wall of the cylinder 2, and the limiting recesses 131 on the oppositely arranged two claw pole plates 1 are matched with the same limiting protrusion 21. In this way, the circumferential relative position of each claw pole plate 1 relative to the cylinder 2 can be limited respectively, and the relative position relationship between the claw pole plates 1 in the circumferential direction is ensured.

[0044] Exemplarily, the limiting protrusion 21 can be in the form of a rib extending in the axial direction. The implementation mode of the limiting protrusion 21 can be determined according to different process conditions. For example, the limiting protrusion 21 can be integrally formed with the side wall of the cylinder 2 by stamping process; for another example, the limiting protrusion 21 can also be independently processed and then fixedly arranged on the cylinder 2 by welding or riveting process. The embodiments of the present application are not limited in this regard. It should be understood that as long as the limiting protrusion 21 can be matched with the limiting recess 131 on the claw pole plate 1, it is within the scope of protection requested by the present application.

[0045] For the limiting recess 131 arranged on each claw pole plate 1, the specific number of limiting recesses 131 can be selected as needed. For example, but not limited to, one, two or a plurality of limiting recesses can be arranged on the outer periphery of the pole body 13 of the claw pole plate 1.

[0046] Please refer to Figure 5 and Figure 6 wherein, Figure 5 is a schematic view of the relative position relationship of the claw pole plates 1 of the stator assembly described in Embodiment One of the present application, Figure 6 is a top view of the claw pole plate 1 described in Embodiment One of the present application.

[0047] In the embodiment, one limiting recess 131 is arranged on the outer periphery of the pole body 13 of the claw pole plate 1. In combination with Figure 6As shown, in the axial projection plane, the line connecting the center of the center hole of the claw pole plate 1 and the center of the tooth slot 12 at the circumferential center position is taken as the first reference line l1, the line connecting the center of the center hole of the claw pole plate 1 and the center of the limiting recess 131 at the circumferential center position is taken as the limiting line l, and the included angle between the limiting line l and the first reference line l1 is δ, δ = α / 2γ. For example, β = 12, γ = 3, α = 15°, and δ = 2.5°.

[0048] For the six claw pole plates 1 of the three-phase motor stator assembly (γ = 3), the inner wall surface of the cylinder body 2 is provided with γ+1 levels of limiting protrusions along the axial direction. For example, the inner wall surface of the cylinder body 2 is provided with four levels of limiting protrusions. Please refer to Figure 7 and Figure 8 wherein, Figure 7 is a top view of the cylinder body according to Embodiment One, Figure 8 is Figure 7 B-B cross-sectional view in

[0049] One limiting recess 131 is formed in the corresponding pole plate body 13, and each level of limiting protrusion includes one limiting protrusion 21, i.e., the first level of limiting protrusion 21a, the second level of limiting protrusion 21b, the third level of limiting protrusion 21c, and the fourth level of limiting protrusion 21d.

[0050] In the axial direction, the four limiting protrusions 21 (the first level of limiting protrusion 21a, the second level of limiting protrusion 21b, the third level of limiting protrusion 21c, and the fourth level of limiting protrusion 21d) are sequentially and spacedly arranged, and the adjacent two limiting protrusions 21 have a spacing, so as to smoothly realize the sequential assembly of the claw pole plates 1. In this way, better assembly process can be obtained.

[0051] In the axial projection plane, the first level of limiting protrusion 21a, the second level of limiting protrusion 21b, the third level of limiting protrusion 21c, and the fourth level of limiting protrusion 21d are sequentially arranged at equal intervals in the circumferential direction on the inner side wall of the cylinder body 2. That is, the included angle between the line connecting the center of the center hole of the claw pole plate 1 and the center of the first level of limiting protrusion 21a, the second level of limiting protrusion 21b, the third level of limiting protrusion 21c, or the fourth level of limiting protrusion 21d at the circumferential center position is θ, θ = (α-α / γ) + 2N*α or θ = (α+α / γ) + 2N*α, wherein N is 0 or a natural number. For example, N = 0, β = 12, γ = 3, α = 15°, θ = 20° or θ = 10°.

[0052] In the embodiment, the limiting recesses 131 on the claw pole plates 1 at both ends are respectively matched with a limiting protrusion 21, and the four claw pole plates 1 in the middle are arranged oppositely in pairs, and the limiting recesses 131 of the oppositely arranged two claw pole plates 1 are axially centered and matched with the same limiting protrusion 21. Specifically, the limiting recess 131 on the first claw pole plate 1' corresponding to the first winding A is matched with the first-stage limiting protrusion 21a; the two limiting recesses 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 collectively matched with the second-stage limiting protrusion 21b; the two limiting recesses 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 collectively matched with the third-stage limiting protrusion 21c; and the limiting recess 131 on the second claw pole plate 1'' corresponding to the third winding is matched with the fourth-stage limiting protrusion 21d.

[0053] In this way, by means of the matched limiting recesses and limiting protrusions, and by the layout of the limiting protrusions on the inner wall surface of the cylinder, the circumferential positioning meeting the motor function requirements can be realized for each claw pole plate 1 based on the same structure, please refer to Figure 9 , which is a top view of Figure 5 . Overall, it can be ensured that the pole teeth 11 of one of the oppositely arranged two claw pole plates 1 corresponding to each phase winding are inserted into the tooth slot 12 of the other, and at the same time, it can be ensured that the corresponding pole teeth 11 on the oppositely arranged two claw pole plates 1 are arranged in a circumferential staggered manner, effectively reducing the product setting cost and process implementation cost.

[0054] It should be noted that the same structure of each claw pole plate 1 means that the sizes and shapes of the pole teeth and the limiting recesses for realizing assembly positioning of each claw pole plate 1 are the same, and the relative positional relationship is the same; at the same time, it also includes the case that the pole plate body is completely the same, and also includes the case that other structures for adapting to process conditions are arranged on the pole plate body.

[0055] In the assembly process, the first claw pole plate 1', the coil and the second claw pole plate 1'' of each winding can be sequentially placed in the cylinder 2, and the circumferential relative positions of each claw pole plate are limited by the matched limiting recesses 131 and limiting protrusions 21. For the axial relative positions of each claw pole plate 1, axial limiting portions 22 can be arranged at both ends of the cylinder 2, and in the axial direction, the pole plate bodies 13 of the claw pole plates 1 (the first claw pole plate 1' of the first winding A and the second claw pole plate 1'' of the third winding C) at both ends are respectively limited by the two axial limiting portions 22.

[0056] In a specific implementation, the axial limiting portion 22 can be formed by the open flange of the cylinder 2. Please refer to 10 and Figure 11 , wherein Figure 10 is an enlarged schematic view of E in Figure 3 .Figure 11 F part in FIG. 1 is an enlarged schematic view. Figure 3 F part in FIG. 1 is an enlarged schematic view.

[0057] Of course, in other specific implementations, the axial limiting part can also be independently machined and formed, and then installed and fixed at both end sides of the cylinder 2 (not shown in the figure), which can also reliably limit the axial relative position relationship of each claw pole plate 1. The embodiments of the present application are not limited.

[0058] Further, in the insertion direction, the winding away from the insertion end side is the first winding A, and the winding close to the insertion end side is the γ winding (the third winding C); the insertion of the first claw pole plate 1' of each winding and the second claw pole plate 1'' of the first winding to the γ-1 winding (the second winding B) will axially center the corresponding limiting recess 131 with the previous limiting protrusion 131 on the insertion path, and then axially move to the position between the previous limiting protrusion 131 and the next limiting protrusion 131, and then rotate to axially center with the next limiting protrusion 131, until it is matched with the corresponding limiting protrusion 131, that is, after assembly, the limiting protrusion 131 of the claw pole plate 1 and the limiting recess 131 form a circumferential limiting pair.

[0059] The assembly method of the motor stator assembly shown in FIG. 1 will be described in detail below. Figure 12 Detailed description Figure 1 The assembly method of the motor stator assembly shown in FIG. 1 will be described in detail below.

[0060] The assembly method of the stator assembly includes the following steps:

[0061] Step S101, the first claw pole plate 1' of the first winding A is placed in the cylinder 2, and after assembly in place along the insertion path P1 shown by the arrow in the figure, the coil (not shown in the figure) of the first winding A is installed.

[0062] Specifically, first, the limiting recess 131 of the first claw pole plate 1' is axially aligned with the fourth level limiting protrusion 21d, and is axially moved to the position where the pole body is located between the third level limiting protrusion 21c and the fourth level limiting protrusion 21d; then, it is rotated to be axially aligned with the limiting recess 131 on the pole body with the third level limiting protrusion 21c, and is axially moved to the position where the pole body is located between the second level limiting protrusion 21b and the third level limiting protrusion 21c; next, it is rotated to be axially aligned with the limiting recess 131 on the pole body with the second level limiting protrusion 21b, and is axially moved to the position where the pole body is located between the first level limiting protrusion 21a and the second level limiting protrusion 21b; finally, the limiting recess 131 on the pole body is axially aligned with the first level limiting protrusion 21a, and is axially moved to be adapted to the first level limiting protrusion 21a to form circumferential limiting. In this state, the pole body of the first claw pole plate 1' of the first winding A is abutted with the axial limiting portion 22 on the side to realize axial limiting. For example, but not limited to, the axial limiting portion 22 can be formed by the open flange of the cylinder 2.

[0063] Step S102, the second claw pole plate 1'' of the first winding A is placed in the cylinder 2, and is assembled into position along the insertion path P2 shown by the arrow in the figure.

[0064] Similarly, the second claw pole plate 1'' adopts the axial movement and rotation described in step S101, so that the limiting recess 131 thereon passes through the fourth level limiting protrusion 21d and the third level limiting protrusion 21c in turn; then, the limiting recess 131 on the pole body is axially aligned with the second level limiting protrusion 21b, and is axially moved to be adapted to the second level limiting protrusion 21b to form circumferential limiting. In this state, the pole body of the second claw pole plate 1'' of the first winding A is abutbed with the coil of the first winding A to realize axial limiting, and the assembly of the first winding A is completed.

[0065] Step S103, the first claw pole plate 1' of the second winding B is placed in the cylinder 2, and is assembled into position along the insertion path P3 shown by the arrow in the figure, and the coil (not shown in the figure) of the second winding B is installed.

[0066] Similarly, the first claw pole plate 1' adopts the axial movement and rotation described in step S101, so that the limiting recess 131 thereon passes through the fourth level limiting protrusion 21d and the third level limiting protrusion 21c in turn; then, the limiting recess 131 on the pole body is axially aligned with the second level limiting protrusion 21b, and is axially moved to be adapted to the second level limiting protrusion 21b to form circumferential limiting. In this state, the pole body of the first claw pole plate 1' of the second winding B is abutbed with the second claw pole plate 1'' of the first winding A to realize axial limiting.

[0067] Step S104, the second claw pole plate 1〞 of the second winding B is placed in the cylinder 2, and is assembled into place along the path P4 shown by the arrow in the figure.

[0068] Similarly, the second claw pole plate 1〞 is axially centered with the fourth level limiting convex part 21d and axially moved to be fitted with the fourth level limiting convex part 21d to form the circumferential limiting. In this state, the pole body of the second claw pole plate 1〞 of the second winding B is abutted with the coil of the second winding B to realize the axial limiting, and the assembly of the second winding B is completed.

[0069] Step S105, the first claw pole plate 1′ of the third winding C is placed in the cylinder 2, and is assembled into place along the path P5 shown by the arrow in the figure, and the coil (not shown in the figure) of the third winding C is installed.

[0070] Similarly, the first claw pole plate 1′ is axially centered with the fourth level limiting convex part 21d after the limiting recess 131 on it passes through the fourth level limiting convex part 21d; and the limiting recess 131 on the pole body is axially centered with the third level limiting convex part 21c and axially moved to be fitted with the third level limiting convex part 21c to form the circumferential limiting. In this state, the pole body of the first claw pole plate 1′ of the third winding C is abutted with the second claw pole plate 1〞 of the second winding B to realize the axial limiting.

[0071] Step S106, the second claw pole plate 1〞 of the third winding C is placed in the cylinder 2, and is assembled into place along the path P6 shown by the arrow in the figure.

[0072] Similarly, the second claw pole plate 1〞 is axially centered with the fourth level limiting convex part 21d and axially moved to be fitted with the fourth level limiting convex part 21d to form the circumferential limiting. In this state, the pole body of the second claw pole plate 1〞 of the third winding C is abutted with the coil of the third winding C to realize the axial limiting, and the assembly of the third winding C is completed.

[0073] Finally, the open edge of the cylinder 2 can be folded to form an axial limiting part 22 to abut with the pole body of the second claw pole plate 1〞 of the third winding C. Here, no further description is given.

[0074] In addition, for the implementation manner of arranging a limiting recess 131 on the outer periphery of the pole body 13 of the claw pole plate 1, the connecting line from the center position of the pole tooth in the circumferential direction to the center of the center hole of the claw pole plate can be taken as the reference line. Please refer to Figure 13 , which is a top view of the claw pole plate according to the second embodiment of the present application. In order to clearly show the differences and connections among the embodiments, the same function of the structure is shown in the same mark in the figure.

[0075] Combining Figure 13 As shown in the axial projection plane, the line connecting the circumferentially central position of the pole tooth 11 and the center of the center hole of the claw pole plate 1 is taken as the second reference line l2, the line connecting the circumferentially central position of the limiting recess 131 and the center of the center hole of the claw pole plate 1 is taken as the limiting line l, and the included angle between the limiting line l and the second reference line l2 is δ, δ = α / 2γ.

[0076] Similarly, based on Figure 7 and Figure 8 the layout of each limiting convex part 21 on the inner wall surface of the cylinder 2, the circumferential positioning that meets the functional needs of the motor can also be achieved for each claw pole plate 1 based on the same structure.

[0077] Other configurations and connection relationships can be the same as those of the first embodiment. Here, no further description is given.

[0078] One limiting recess is arranged on each of the claw pole plates described in the first embodiment and the second embodiment. In other specific implementations, two limiting recesses 131 can also be arranged on the outer periphery of the pole plate body 13 of each claw pole plate 1. Please also refer to Figure 14 and Figure 15 wherein, Figure 14 is a schematic view of the relative position relationship of each claw pole plate of the stator assembly described in the third embodiment of the present application, Figure 15 is a top view of the claw pole plate described in the third embodiment of the present application. In order to clearly show the differences and relationships among the embodiments, the configurations and structures with the same functions are shown with the same reference numerals in the figures.

[0079] As shown in Figure 14 two limiting recesses 131 are arranged on the outer periphery of the pole plate body 13 of each claw pole plate 1. Combining Figure 15 As shown in the axial projection plane, the line connecting the circumferentially central position of the pole tooth 11 and the center of the center hole of the claw pole plate 1 is taken as the second reference line l2, the line connecting the circumferentially central position of the limiting recess 131 and the center of the center hole of the claw pole plate 1 is taken as the limiting line l, and the included angle between the limiting line l and the second reference line l2 is δ, δ = α / 2γ.

[0080] In other possible implementations, the limiting lines l corresponding to the two limiting recesses 131 can also be designed as follows: the included angle between the first reference line l1 and the circumferentially adjacent limiting line l is δ1 (not shown in the figure), the included angle between the two limiting lines l is δ2, and similarly, 2δ1+δ2=2N*α±α / γ, wherein 0≤δ1≤2α, and N is 0 or a natural number.

[0081] Correspondingly, the inner wall surface of the cylinder body 2 is provided with γ+1 levels of limiting protrusions in the axial direction, and the inner wall surface of the cylinder body 2 is provided with four levels of limiting protrusions. Please see Figure 16 and Figure 17 wherein, Figure 16 is a top view of the cylinder body according to Embodiment Three of the present application, Figure 17 is Figure 16 G-G sectional view in

[0082] Corresponding to the two limiting recesses 131 opened on the pole body 13, each level of limiting protrusions includes two limiting protrusions 21, which are two first level limiting protrusions 21a, two second level limiting protrusions 21b, two third level limiting protrusions 21c and two fourth level limiting protrusions 21d.

[0083] Similarly, in the axial direction, each level of limiting protrusions 21 (two first level limiting protrusions 21a, two second level limiting protrusions 21b, two third level limiting protrusions 21c and two fourth level limiting protrusions 21d) are sequentially and spacedly arranged, and as shown in Figure 17 , the adjacent two limiting protrusions 21 have a spacing.

[0084] As shown in Figure 16 , in the axial projection plane, each level of limiting protrusions 21 is sequentially arranged on the inner side wall of the cylinder body 2 with equal spacing in the circumferential direction, and the two first level limiting protrusions 21a, the two second level limiting protrusions 21b, the two third level limiting protrusions 21c and the two fourth level limiting protrusions 21d are sequentially arranged one by one, and the corresponding limiting protrusions in the adjacent two levels of limiting protrusions are respectively arranged at the central position in the circumferential direction, and the included angle between the connecting line of the center of the central hole of the claw pole plate 1 and the center of the central hole of the claw pole plate 1 is θ, θ=(α-α / γ)+2N*α or θ=(α+α / γ)2N*α, wherein N is 0 or a natural number.

[0085] Further, in order to improve the stability of the assembly relationship of each claw pole plate, for the case that the claw pole plate 1 is provided with two limiting recesses 131, on the basis of satisfying 2δ1+δ2=2N*α±α / γ, the included angle δ2 of the two limiting lines l can be close to 180°. Please see Figure 18 and Figure 19 wherein, Figure 18 is a schematic diagram of the relative position relationship of each claw pole plate of the stator assembly according to Embodiment Four of the present application, Figure 19 is a top view of the claw pole plate according to Embodiment Four of the present application. In order to clearly show the differences and connections between the embodiments, the same function and structure are shown in the same mark in the figure.

[0086] As shown in Figure 18 and Figure 19As shown, the pole body 13 of each claw pole plate 1 is provided with two limiting recesses 131 along the outer periphery, and the included angle δ2 of the two limiting lines l is 180°, and δ1 is 2.5°, based on the condition that 2δ1+δ2=2N*α±α / γ.

[0087] Correspondingly, the inner wall surface of the cylinder body 2 is provided with four levels of limiting protrusions in the axial direction. Please see Figure 20 and Figure 21 wherein, Figure 20 is a top view of the cylinder body according to the fourth embodiment of the present application, Figure 21 is Figure 20 H-H cross-sectional view in

[0088] In the axial direction, each level of limiting protrusions 21 (two first level limiting protrusions 21a, two second level limiting protrusions 21b, two third level limiting protrusions 21c and two fourth level limiting protrusions 21d) are sequentially and spacedly arranged, and as shown in Figure 21 , the adjacent two limiting protrusions 21 have a spacing.

[0089] As shown in Figure 20 , in the axial projection plane, the two first level limiting protrusions 21a, the two second level limiting protrusions 21b, the two third level limiting protrusions 21c and the two fourth level limiting protrusions 21d are one-to-one correspondingly arranged, and the corresponding limiting protrusions in the adjacent two levels of limiting protrusions have an included angle θ with the connecting line of the center of the central hole of the claw pole plate 1 at the central position in the circumferential direction.

[0090] It should be noted that the above-mentioned embodiments provided by the present embodiment are the core points of the present application, and the skilled in the art can realize them based on the prior art, so this text will not be repeated. It should be understood that as long as the technical means consistent with the core idea of the present scheme are used, they are within the scope of the present application.

[0091] The above is only the preferred embodiment of the present application, and it should be noted that for those skilled in the art, without departing from the principles of the present application, several improvements and refinements can be made, and these improvements and refinements should be considered as the protection scope of the present application.

Claims

1. An electric motor, characterized in that, The stator assembly (10) includes a cylinder (2) and multiphase windings stacked sequentially within the cylinder (2). The coil of each phase winding is located between two opposing claw plates (1). The pole teeth of the two claw plates (1) extend towards each other from their respective plate bodies (13). The pole teeth (11) of one claw plate (1) are inserted into the tooth groove (12) of the other claw plate (1). The two adjacent claw plates (1) of two adjacent phase windings are arranged back to back, and the pole teeth (11) of the two opposing claw plates (1) are staggered in the circumferential direction. The claw electrode plate (1) has a limiting recess (131) on the outer periphery of the electrode plate body (13). Correspondingly, the inner sidewall of the cylinder (2) has a limiting protrusion (21) that is adapted to the limiting recess (131). The claw electrode plate (1) forms a circumferential limiting pair through the limiting recess (131) and the corresponding limiting protrusion (21).

2. The motor according to claim 1, characterized in that, The claw poles (1) of the windings in each phase have the same structure.

3. The motor according to claim 1, characterized in that, The inner wall of the cylinder (2) is provided with γ+1 level limiting protrusions (21) along the axial direction, and the two adjacent levels of the limiting protrusions (21) have a distance, where γ is the number of phases; In the axial projection plane, the limiting recesses (131) of the two claw pole plates (1) of each phase winding are staggered, and the limiting recesses (131) of the two opposing claw pole plates (1) of the two adjacent phase windings are overlapped, and the two overlapping limiting recesses (131) are adapted to the same limiting protrusion (21).

4. The motor according to claim 3, characterized in that, In the axial projection plane, the line connecting the center of the center hole of the claw pole plate (1) at the center position of the two adjacent limiting protrusions (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 according to claim 4, characterized in that, The limiting protrusions (21) at each level are arranged sequentially at equal intervals on the inner wall of the cylinder (2) in the circumferential direction.

6. The motor according to claim 4 or 5, characterized in that, The limiting recess (131) is provided on the outer periphery of the electrode body (13) of the claw electrode plate (1). 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 recess (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 according to claim 4 or 5, characterized in that, Two limiting recesses (131) are provided on the outer periphery of the electrode body (13) of the claw electrode plate (1). 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 between 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. The motor according to claim 1, characterized in that, The limiting protrusion (21) is a strip-shaped part that extends along the axial direction.

9. The motor according to claim 8, characterized in that, The limiting protrusion (21) and the cylinder are integrally formed by stamping; or, the limiting protrusion (21) and the cylinder are fixedly connected by welding or riveting.

10. The motor according to claim 1, characterized in that, The two ends of the cylinder (2) are respectively provided with axial limiting parts (22). In the axial direction, the electrode body (13) of the claw electrode plate (1) located at both ends abuts against the two axial limiting parts (22).

11. The motor according to claim 10, characterized in that, The axial limiting part (22) is the open folded edge of the cylinder (2).

12. A method for assembling a motor, characterized in that, The assembly method of the motor includes the assembly of a stator assembly, which includes a cylinder (2) and multi-phase windings stacked sequentially in the cylinder (2); the coil of each phase winding is located between two opposing claw pole plates (1), which are respectively a first claw pole plate (1′) and a second claw pole plate (1″). The outer periphery of the pole plate body (13) of the claw pole plate (1) is provided with a limiting recess (131), and correspondingly, the inner sidewall of the cylinder (2) has a limiting protrusion (21) adapted to the limiting recess (131); the claw pole plate (1) forms a circumferential limiting pair through the limiting recess (131) and the corresponding limiting protrusion (21); The assembly of the stator assembly includes: sequentially placing the first claw plate (1′), coil and second claw plate (1″) of each winding into the cylinder (2), and defining the circumferential relative position of each claw plate (1) by the matching limiting recess (131) and limiting protrusion (21).

13. The motor assembly method according to claim 12, characterized in that, The inner wall of the cylinder (2) is provided with a γ+1 level limiting protrusion (21) along the axial direction, and the two adjacent levels of the limiting protrusion (21) have a gap; in the insertion direction, the winding away from the insertion end side is the first winding, and the winding close to the insertion end side is the γ winding. The step of sequentially placing the first claw pole plate (1′), coil, and second claw pole plate (1″) of each winding into the cylinder (2) includes: placing the first claw pole plate (1′) of each winding and the second claw pole plate (1″) from the first winding to the (γ-1)th winding, in which the corresponding limiting recess (131) is axially aligned with the limiting protrusion of the previous level on the placement path, and then moved axially through the limiting protrusion of the previous level to between it and the limiting protrusion of the next level, and then rotated to be axially aligned with the limiting protrusion of the next level, until it is adapted to the corresponding limiting protrusion.

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