BMC injection molding stator

Abstract

The utility model discloses a BMC injection molding stator, which comprises a stator iron core, two fixing plates and an iron core positioning groove, the surface of the stator iron core is coated with an injection molding shell, the end face of the injection molding shell is provided with three annularly arranged first ejector pin grooves, the surface of the injection molding shell is provided with twelve second ejector pin grooves, the number of the fixing plates is two, and the fixing plates are connected with the stator iron core. The iron core positioning groove is formed in the inner wall of the injection molding shell, and the stator iron core is clamped by the iron core positioning groove; the first ejector pin groove and the second ejector pin groove in the surface of the injection molding shell are matched with the ejector pins of the mold, so that the stator iron core in the vertical direction can be fixed, after injection molding is completed, all the ejector pins are matched with the first ejector pin groove and the second ejector pin groove to stably eject the injection molding shell, the ejector pins can be prevented from damaging the injection molding shell through the preset second ejector pin groove, and the yield of the injection molding shell is improved; the iron core positioning groove positions the injection molding shell and the stator iron core in the injection molding process, the stator iron core is prevented from rotating in the injection molding process, and the headspace phenomenon of front and back ejector pins of the BMC caused by rotation of the stator iron core is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to injection molding stator technical field, concretely a kind of BMC injection molding stator. BACKGROUND

[0002] BMC (Bulk Moulding Compound) injection molding stator is made of motor stator component by BMC material through injection molding process.BMC material is bulk molding compound, with excellent electrical performance, mechanical properties, heat resistance, chemical corrosion resistance, can extend the life of stator core.

[0003] In the related art, after injection molding stator is formed, it is ejected by ejector pin, when directly ejecting injection molding stator by ejector pin, mark may be left on the surface of injection molding stator, resulting in poor surface quality of injection molding stator, subsequent need to polish injection molding stator, and the manufacturing process of injection molding stator is relatively complex. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a kind of BMC injection molding stator to solve the problems raised in the above background.

[0005] To achieve the above object, the utility model provides the following technical scheme: a kind of BMC injection molding stator, including stator core, the surface of the stator core is coated with injection molding shell, BMC material has good heat resistance and chemical corrosion resistance, ensure that stator core can still maintain stable performance under high temperature and harsh environment;

[0006] The end surface of the injection molding shell is provided with three annularly arranged first ejector pin grooves, and the surface of the injection molding shell is provided with twelve second ejector pin grooves, the ejector pin is placed in the first ejector pin groove and the second ejector pin groove, to reduce the probability of damage to the injection molding shell and improve the qualified rate of the injection molding shell;

[0007] The fixing plate is provided with two and connected with the stator core, the winding group of the stator core is connected with a terminal lug, the terminal lug passes through the fixing plate, to improve the stability of the terminal lug and prevent the terminal lug from breaking;

[0008] The core positioning groove is arranged in the inner wall of the injection molding shell, the core positioning groove clamps the stator core, to prevent the stator core from rotating during injection molding, with high injection molding precision.

[0009] Further, the surface of the injection molding shell is provided with four mounting seats, when the BMC injection molding stator is used to form a motor, the four mounting seats are used to fix the motor.

[0010] Further, the stator core surface is provided with a plurality of positioning rods, the fixing plate is sleeved on the positioning rod surface, the fixing plate surface is provided with a round hole and a square hole, the positioning rod and the lug are inserted into the round hole and the square hole, and the fixing plate is stable in installation and cannot be dislocated during injection molding.

[0011] Compared with the prior art, the utility model has the advantages that:

[0012] (1) the first needle groove and the second needle groove on the surface of the injection shell cooperate with the ejector pins of the mold to fix the stator core in the vertical direction, after injection molding, all the ejector pins cooperate with the first needle groove and the second needle groove to stably eject the injection shell, the second needle groove can prevent the ejector pins from damaging the injection shell, improve the yield of the injection shell, and reduce the polishing step of the injection shell.

[0013] (2) the iron core positioning groove positions the injection shell and the stator core during injection molding, prevents the stator core from rotating during injection molding, and avoids the phenomenon that the ejector pins on the front and back surfaces of the BMC are empty due to the rotation of the stator core. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a perspective view of the utility model;

[0015] Figure 2 It is a schematic view of the connection between the injection shell and the convex cover of the utility model;

[0016] Figure 3 It is a schematic view of the split structure of the injection shell and the stator core of the utility model;

[0017] Figure 4 It is a schematic view of the structure of the fixing plate of the utility model;

[0018] Figure 5 It is a schematic view of the connection between the fixing plate and the square hole of the utility model.

[0019] In the figure: 1, injection shell; 2, copper nut; 3, mounting seat; 4, first needle groove; 5, lug; 6, second needle groove; 7, convex cover; 8, stator core; 9, positioning rod; 10, fixing plate; 11, round hole; 12, square hole; 13, iron core positioning groove. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0021] Embodiment:

[0022] Please refer to Figures 1-5 The utility model provides a technical scheme: a BMC injection stator, including stator core 8, the surface of stator core 8 is covered with injection shell 1, the end surface of injection shell 1 is equipped with three annularly arranged first thimble grooves 4, the surface of injection shell 1 is equipped with twelve second thimble grooves 6, preset first thimble groove 4 and second thimble groove 6 on injection shell 1, when ejecting injection shell 1, it is not easy to leave marks on the surface of injection shell 1, and the appearance quality of injection shell 1 is better;

[0023] Fixed plate 10, the fixed plate 10 is set two and is connected with stator core 8, the winding group of stator core 8 is connected with terminal lug 5, terminal lug 5 passes through fixed plate 10, and fixed plate 10 positions terminal lug 5, keeps terminal lug 5 in the state of not being easy to bend, and subsequent connection wire is convenient;

[0024] Iron core positioning groove 13, the iron core positioning groove 13 is arranged in the inner wall of injection shell 1, the iron core positioning groove 13 clamps stator core 8, prevents stator core 8 from rotating when injection, and ensures that stator core 8 and injection shell 1 are accurately matched.

[0025] In the embodiment, as shown in Figure 1 The surface of injection shell 1 is provided with four mounting seats 3, and the four mounting seats 3 facilitate fixing the injection shell 1 by means of screws and nuts. When the BMC injection stator is assembled into a motor, the installation of the motor can be realized.

[0026] In the embodiment, as shown in Figure 2 The middle part of the surface of the injection shell 1 is provided with a convex cover 7, the convex cover 7 is used for installing a bearing, the convex cover 7 positions the rotor through the bearing, the convex cover 7 protects the bearing, and prevents the bearing from entering dust.

[0027] In the embodiment, as shown in Figure 3 The surface of the stator core 8 is provided with a plurality of positioning rods 9, the fixed plate 10 is sleeved on the surface of the positioning rod 9, the positioning and installation of the fixed plate 10 are realized, and during the injection process, it is ensured that the fixed plate 10 will not be misaligned.

[0028] In the embodiment, as shown in Figures 3-5 The surface of the fixed plate 10 is provided with a round hole 11 and a square hole 12, the positioning rod 9 and the terminal lug 5 are inserted into the inside of the round hole 11 and the square hole 12, and the fixed plate 10 is more convenient to install, which is conducive to improving the production and assembly efficiency of the MC injection stator.

[0029] In the embodiment, as shown in Figure 1 The surface of the injection shell 1 is inlaid with three copper nuts 2, and the cover plate can be connected with the injection shell 1 by using screws.

[0030] Specifically, in use, the stator core 8 is placed in the mold, the ejector pin at the front face 12 of the mold is placed on the front face of the stator core 8, the ejector pin at the back face 3 of the mold is placed on the back face of the stator core 8, the stator core 8 is fixed in the vertical direction, the stator core 8 is prevented from moving, the BMC material is injected around the stator core 8, and the injection mold shell 1 is formed after the BMC material is formed, at this time, the 15 ejector pins cooperate with the first ejector pin groove 4 and the second ejector pin groove 6 to eject the injection mold shell 1, then the injection mold shell 1 and the ejector pin are separated, at this time, the first ejector pin groove 4 and the second ejector pin groove 6 are evenly distributed to the injection mold shell 1, the surface of the injection mold shell 1 is not easy to leave damage marks, and the overall quality of the BMC injection stator is better.

[0031] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A BMC injection-molded stator, characterized in that, include: Stator core (8), the surface of the stator core (8) is covered with an injection molded shell (1), the end face of the injection molded shell (1) is provided with three first ejector pin grooves (4) arranged in a ring, and the surface of the injection molded shell (1) is provided with twelve second ejector pin grooves (6). Fixing plate (10), two fixing plates (10) are provided and connected to stator core (8), the winding group of stator core (8) is connected with a connecting piece (5), and the connecting piece (5) passes through the fixing plate (10). The iron core positioning groove (13) is set on the inner wall of the injection molded shell (1) and the iron core positioning groove (13) holds the stator iron core (8).

2. A BMC injection molded stator according to claim 1, characterized in that: The injection-molded shell (1) has four mounting seats (3) on its surface.

3. A BMC injection molded stator according to claim 1, characterized in that: The injection-molded shell (1) has a convex cover (7) in the middle of its surface, which is used to install bearings.

4. A BMC injection molded stator according to claim 1, characterized in that: The stator core (8) has several positioning rods (9) on its surface, and the fixing plate (10) is fitted onto the surface of the positioning rods (9).

5. A BMC injection molded stator according to claim 4, characterized in that: The surface of the fixing plate (10) is provided with a round hole (11) and a square hole (12), and the positioning rod (9) and the connecting piece (5) are inserted into the round hole (11) and the square hole (12).

6. A BMC injection molded stator according to claim 1, characterized in that: The injection-molded shell (1) has three copper nuts (2) embedded on its surface.

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