Stator iron core, stator assembly comprising stator iron core and air-inlet grille actuator

Abstract

The utility model discloses a stator iron core and a stator assembly and an air-inlet grille actuator comprising the same, comprising an annular yoke part and a plurality of tooth parts extending from the annular yoke part to the axis of the annular yoke part, and a plurality of through holes axially penetrating through the stator iron core are uniformly arranged at the joint positions of the yoke part and the tooth parts. Arc-shaped grooves which are axially through are formed in the radial outer sides of the tooth parts between the adjacent through holes; any arc-shaped groove can be used as a positioning hole during injection molding of the stator iron core; any through hole can form an axially through grounding terminal jack after injection molding of the stator core. Any arc-shaped groove can form an axially through three-phase terminal jack after injection molding of the stator core. According to the utility model, the terminal holes for connecting the grounding terminals and the three-phase terminals are arranged on the stator core, and the injection molding positioning holes and the terminal holes are universalized, so that the miniaturization design of the motor is realized, the universality of the stator core is improved, and the integrated molding during the injection molding of the insulating framework is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of the design of an automotive intake grille adjustment actuator, in particular to a stator core, a stator assembly including the same, and an intake grille actuator. Background Art

[0002] The main function of an automotive intake grille is to provide an intake passage for the automotive engine or battery pack to facilitate timely heat dissipation of the vehicle. Automotive intake grille actuators usually adopt direct current brushless motors. In existing direct current brushless motors, the pin holes for installing motor pins are usually arranged on an insulating skeleton, and the insulating skeleton is sleeved outside the stator core, which can avoid contact between the stator core and live components. However, this will cause an increase in the axial and radial dimensions of the stator assembly. For example, in the patent No. CN202320841767, the pins are arranged on the insulating skeleton inside the stator core, and in the patent No. CN217183066U, the pins are arranged on the insulating skeleton outside the stator core. In occasions where space requirements are not high, the above designs can well meet the motor working requirements. However, with the continuous improvement of automotive automation, the miniaturization requirements for various components in the vehicle, including the intake grille actuator, are getting higher and higher, and a new pin connection structure is needed to achieve the miniaturization design of the motor.

[0003] In addition, in terms of the assembly method of the pins, the motor pins in the prior art are installed at one end of the coil skeleton. First, enameled wire winding is carried out, and then it is installed on the PCB board. The process is complex, the installation efficiency is low, and different hole-shaped structures need to be designed on the stator core for terminal assembly and injection molding positioning. The universality of the stator core during injection molding and terminal assembly is poor. Summary of the Utility Model

[0004] In order to solve the technical problems that the existing stator core has larger axial and radial dimensions after being assembled with terminals and the universality of the stator core during injection molding and terminal assembly is poor, the utility model provides a stator core, a stator assembly including the same, and an intake grille actuator to solve the above problems.

[0005] The utility model provides a stator core, which includes an annular yoke portion and a plurality of tooth portions extending from the annular yoke portion towards its axis. A plurality of through holes axially penetrating the stator core are uniformly spaced at the position where the yoke portion and the tooth portions meet. Axially penetrating arc-shaped grooves are arranged on the radial outer sides of the tooth portions between adjacent through holes; any of the arc-shaped grooves can be used as a positioning hole during injection molding of the stator core; any of the through holes can form an axially penetrating grounding terminal jack after the stator core is injection molded; any of the arc-shaped grooves can form an axially penetrating three-phase terminal jack after the stator core is injection molded.

[0006] Further, the through holes are round holes or square holes.

[0007] Further, the number of the through holes is 3N, where N is a positive integer.

[0008] The present utility model further provides a stator assembly, including the stator core, the insulating skeleton and the enameled wire wound around the insulating skeleton as described above. A grounding terminal and three-phase terminals are respectively inserted into the grounding terminal jack and the three-phase terminal jacks of the stator core.

[0009] Further, the stator core and the insulating skeleton are integrally injection molded. Insulating materials are injection molded on the inner walls of the three-phase terminal jacks, and no insulating materials are injection molded on the inner walls of the grounding terminal jacks.

[0010] Further, the grounding terminal and the three-phase terminals respectively penetrate through both ends of the stator core. One end of the three-phase terminals is connected to the enameled wire, and the other end is connected to the PCB board of the intake grille actuator.

[0011] Further, both the grounding terminal and the three-phase terminals are fish-eye terminals.

[0012] Further, the axial end faces of the annular yoke portion and the tooth portion are on the same injection molding surface. A wire routing groove is provided on the circumferential outer side of the end of the stator assembly away from the PCB board.

[0013] Further, the circumferential outer side of the stator assembly has a plurality of wire clamping platforms located outside the wire routing groove and extending radially outward. The wire clamping platforms are located radially outside the tooth portion.

[0014] The present utility model further provides an intake grille actuator, including the stator assembly as described above.

[0015] The beneficial effects of the present utility model are as follows:

[0016] (1) In the present utility model, the terminal holes for connecting the grounding terminal and the three-phase terminals are both provided on the stator core, thereby reducing the axial and radial dimensions of the stator assembly. At the same time, the injection molding positioning holes and the terminal holes are made universal, which not only realizes the miniaturized design of the motor but also improves the universality of the stator core, facilitating integral molding during the injection molding of the insulating skeleton.

[0017] (2) In the present utility model, the three-phase terminals penetrate through the stator core. One end of the three-phase terminals is connected to the enameled wire, and the other end is connected to the PCB circuit board, which is convenient for installation, improves the assembly efficiency, and reduces the cost. Description of the Drawings

[0018] The following further describes the present utility model in conjunction with the drawings and embodiments.

[0019] Figure 1 is the front view of the stator core described in the present utility model;

[0020] Figure 2is a perspective view of the stator assembly of the present utility model (observed from the side facing the PCB board);

[0021] Figure 3 is a perspective view of the stator assembly of the present utility model (observed from the side facing away from the PCB board)

[0022] Figure 4 is a schematic assembly diagram of the stator assembly of the present utility model and the PCB board.

[0023] In the figure, 1 is the stator core, 2 is the annular yoke portion, 3 is the tooth portion, 4 is the through hole, 5 is the arc-shaped groove, 6 is the positioning hole, 7 is the ground terminal jack, 8 is the three-phase terminal jack, 9 is the stator assembly, 10 is the ground terminal, 11 is the three-phase terminal, 12 is the wiring groove, 13 is the wire clamping platform, 14 is the enameled wire, and 15 is the PCB board. Detailed Embodiment

[0024] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation of the present utility model.

[0025] Embodiment 1

[0026] As Figure 1 and Figure 2 shown, a stator core includes an annular yoke portion 2 and a plurality of tooth portions 3 extending from the annular yoke portion 2 towards its axis. The tooth portions 3 separate adjacent winding grooves and are used for winding multi-strand coils. A plurality of through holes 4 axially penetrating the stator core 1 are evenly spaced at the position where the yoke portion and the tooth portion 3 meet. An axially penetrating arc-shaped groove 5 is provided on the radial outer side of the tooth portion 3 between adjacent through holes 4; any arc-shaped groove 5 can be used as a positioning hole 6 during the injection molding of the stator core 1; any through hole 4 can form an axially penetrating ground terminal jack 7 after the stator core 1 is injection molded; any arc-shaped groove 5 can form an axially penetrating three-phase terminal jack 8 after the stator core 1 is injection molded.

[0027] The three-phase terminal jack 8 is used to connect the three-phase terminals 11, and the three-phase terminals 11 refer to the terminals of the "U", "V", and "W" phases. The ground terminal jack 7 is connected to the ground terminal 10 for grounding. The shape of the through hole 4 can be square or circular, preferably a circular hole, which is convenient for processing and matching with the terminals.

[0028] The three-phase terminal jack 8 is an arc-shaped groove 5 before injection molding, located on the outer peripheral surface of the stator core 1. The positioning hole 6 during injection molding is also provided on the outer peripheral surface of the stator core 1. Therefore, the arc-shaped groove 5 can be selected as the positioning hole 6 or the three-phase terminal jack 8. When selected as the positioning hole 6, the arc-shaped groove 5 is not injection molded into a round hole shape.

[0029] A plurality of through holes 4 are also provided. There is only one through hole 4 inserted with the grounding terminal 10, and the remaining through holes 4 can be used for weight reduction. The number of through holes 4 is preferably evenly distributed and related to the number of teeth 3 of the stator core. According to the conventional design of the number of poles of the stator core, usually the number of through holes 4 is 3N, where N is a positive integer.

[0030] Such as Figure 1 shown, taking the nine-slot stator core 1 as an example:

[0031] There are a total of three through holes 4 on the stator core 1, and any one of the through holes 4 can be selected to cooperate with the grounding terminal 10 for grounding.

[0032] There are a total of six arc-shaped grooves 5 on the stator core 1. Any three of the arc-shaped grooves 5 can be injection molded into three-phase terminal jacks 8, which are respectively matched with the terminals of the "U", "V", and "W" three phases. For the remaining three arc-shaped grooves 5, any two of them can be used as positioning holes 6 for fixing the relative position during integral injection molding, ensuring the uniqueness of the stator assembly 9 after integral injection molding. As Figure 2 shown, after injection molding, three three-phase terminal jacks 8 are injection molded into round hole shapes, and the positioning hole 6 remains arc-shaped. The arc-shaped groove 5 is preferably a semi-circular hole for convenient processing.

[0033] The above-mentioned stator core 1 has strong versatility and is convenient for installation during the integral injection molding of the skeleton.

[0034] Embodiment 2

[0035] A stator assembly 9 includes the stator core 1, an insulating skeleton, and an enameled wire 14 wound around the insulating skeleton as described above. A grounding terminal 10 and a three-phase terminal 11 are respectively inserted at the grounding terminal jack 7 and the three-phase terminal jack 8 of the stator core 1.

[0036] Since the terminals are installed on the stator core 1, compared with the prior art where the terminals are installed on the insulating skeleton extending inward or outward of the stator core 1, the stator assembly 9 of the present invention can reduce the axial height and radial dimensions, so as to be applicable to occasions with high space requirements.

[0037] The insulating skeleton can be inserted into the stator core 1. In the present utility model, it is preferably that the stator core 1 and the insulating skeleton are integrally injection-molded. Among them, insulating materials are injection-molded at the three-phase terminal jacks 8 to ensure insulation between the three-phase terminals 11 and the stator core 1. Insulating materials are not injection-molded at the grounding terminal jack 7, and the grounding terminal 10 and the stator core 1 are in direct contact for grounding purposes.

[0038] Embodiment Three

[0039] On the basis of Embodiment Two, as Figure 4 shown, the grounding terminal 10 and the three-phase terminals 11 respectively penetrate through both ends of the stator core 1. One end of the three-phase terminal 11 is connected to the enameled wire 14, and the other end is connected to the PCB board 15 of the intake grille actuator.

[0040] In the prior art, the enameled wire 14 and the PCB board 15 are connected to the same end of the terminal, which will cause complex processing technology and low assembly efficiency. In this embodiment, the enameled wire 14 and the PCB board 15 can be connected at both ends of the three-phase terminal 11 respectively, and the two works do not interfere with each other, which is not only convenient for assembly but also can realize synchronous work and improve production efficiency.

[0041] The grounding terminal 10 and the three-phase terminals 11 are preferably fish-eye terminals, and the elastic crimping of the fish-eye terminals replaces the traditional welding process to further improve the assembly efficiency.

[0042] Embodiment Four

[0043] In the traditional stator assembly 9, the wire routing groove 12 of the enameled wire 14 is arranged at the end of the stator assembly 9. In order to further reduce the axial height of the stator assembly 9 and avoid interference between the wire winding groove and the terminal hole, as Figure 2 and Figure 3 shown, on the basis of the above embodiments, in this embodiment, the axial end faces of the annular yoke part 2 and the tooth part 3 are on the same injection surface, and a wire routing groove 12 is arranged on the circumferential outer side of the end of the stator assembly 9 away from the PCB board 15. The equal-height design of the annular yoke part 2 and the tooth part 3 can reduce the axial height of the stator assembly 9, and the wire routing groove 12 located on the outer side of the stator assembly 9 can make way for the through hole 4.

[0044] In a further design, the circumferential outer side of the stator assembly 9 has a plurality of wire clamping platforms 13 located outside the wire routing groove 12 and extending radially outward. The wire clamping platforms 13 are located radially outside the tooth part 3. The wire clamping platforms 13 are used to press the enameled wire 14 in the wire routing groove 12. The wire clamping platforms 13 extend radially outward of the stator assembly 9 and do not occupy the axial space of the stator assembly 9, ensuring the miniaturized design of the stator assembly 9.

[0045] Embodiment Five

[0046] An intake grille actuator includes the stator assembly 9 described above. Since both the axial and circumferential dimensions of the stator assembly 9 are reduced and the assembly process of the terminals is simplified, the production cost of the intake grille actuator is reduced, making it more suitable for occasions with high space requirements.

[0047] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "inner", "outer", "axial", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0048] In addition, in the description of the present invention, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0049] In this specification, the schematic description of the terms does not necessarily refer to the same embodiment. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments.

[0050] Based on the above inspiration from the ideal embodiments of the present invention, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of the present invention. The technical scope of the present invention is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A stator core, characterized in that: The invention comprises an annular yoke (2) and a plurality of teeth (3) extending from the annular yoke (2) toward the axis thereof; a plurality of through holes (4) axially penetrating the stator core (1) are evenly spaced at the intersection of the yoke and the teeth (3); and an axially penetrating arcuate groove (5) is arranged on the radial outer side of the teeth (3) between adjacent through holes (4); any of the arcuate grooves (5) can be used as a positioning hole (6) when the stator core (1) is injected; Any of the through holes (4) can form an axially penetrating grounding terminal insertion hole (7) after the stator core (1) is injection molded; Any of the arc-shaped slots (5) can form an axially penetrating three-phase terminal jack (8) after the stator core (1) is injection molded.

2. The stator core according to claim 1, characterized in that: The through hole (4) is a round hole or a square hole.

3. The stator core according to claim 1, characterized in that: The number of the through holes (4) is 3N, where N is a positive integer.

4. A stator assembly, characterized in that: It comprises a stator core (1) as claimed in any one of claims 1 to 3, an insulating frame and an enameled wire (14) wound on the insulating frame, wherein a grounding terminal plug hole (7) and a three-phase terminal plug hole (8) of the stator core (1) are respectively plugged with a grounding terminal (10) and a three-phase terminal (11).

5. The stator assembly according to claim 4, characterized in that: The stator core (1) and the insulating frame are integrally injection molded, the inner wall of the three-phase terminal plug hole (8) is injection molded with insulating material, and the inner wall of the ground terminal plug hole (7) is not injection molded with insulating material.

6. The stator assembly according to claim 4, characterized in that: The grounding terminal (10) and the three-phase terminal (11) respectively pass through the two ends of the stator core (1); one end of the three-phase terminal (11) is connected to the enameled wire (14), and the other end is connected to the PCB board (15).

7. The stator assembly according to claim 4, characterized in that: The grounding terminal (10) and the three-phase terminal (11) are both fisheye terminals.

8. The stator assembly according to claim 4, characterized in that: The axial end faces of the annular yoke (2) and the toothed portion (3) are located on the same injection molding surface, and a wiring groove (12) is provided on the circumferential outer side surface of one end of the stator assembly (9) away from the PCB board (15).

9. The stator assembly according to claim 8, characterized in that: The circumferential outer side surface of the stator assembly (9) has a plurality of wire clamping platforms (13) located outside the wire routing groove (12) and extending radially outward, and the wire clamping platforms (13) are located radially outside the tooth portion (3).

10. An air intake grille actuator, characterized in that: Comprising the stator assembly (9) according to any one of claims 4 to 9.

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