Subassembly waterproof structure of inner rotor brushless motor stator

Abstract

The utility model discloses a kind of inner rotor brushless motor stator subassembly waterproof structures, it is related to motor design field, including motor shell;The middle part in motor shell is fixedly installed with locating cylinder, and locating cylinder is formed between the outer wall of locating cylinder and the inner wall of motor shell Encapsulation groove position;Annular iron core and annular driving plate are installed with sleeve on locating cylinder, and the inside of annular iron core is formed with a plurality of winding grooves, and copper winding is installed with winding in winding groove;Encapsulation groove position is filled with glue, and after glue drying, annular iron core, annular driving plate and copper winding are sealed in encapsulation groove position;Compared with prior art, the utility model is installed into motor shell with locating cylinder, locating cylinder and motor shell are formed between the encapsulation groove position, then the relevant structure of stator is installed in encapsulation groove position, finally filling glue to encapsulation groove position, realize stable glue sealing, avoid the cost generated by using demoulding jig, simultaneously can fast processing production, and high yield.

Description

Technical Field

[0001] This utility model relates to the field of motor design, and in particular to a waterproof sub-component structure of an internal rotor brushless motor stator. Background Technology

[0002] A brushless DC motor consists of a motor body and a driver, and is a typical mechatronic product. Because a brushless DC motor operates in a self-controlled manner, it does not require an additional starting winding on the rotor like a synchronous motor that starts under heavy load with frequency conversion speed regulation, nor does it experience oscillation or loss of synchronism during sudden load changes.

[0003] In order to make brushless motors waterproof, in the current brushless motor industry with internal rotor structure, the stator assembly of the motor is generally produced by demolding using a potting method. For example, an existing patent (publication number: WO2020010764A1, publication date: 2020.01.16) discloses a motor, power assembly and drone, in which the coil is wrapped with a potting layer to achieve waterproof sealing.

[0004] However, in the existing technology and the above-mentioned potting solution, a demolding fixture corresponding to the size of the motor is required to pot the glue onto the stator structure. The demolding fixture will increase the manufacturing cost, and it is easy to cause glue leakage or insufficient glue during potting. Furthermore, since the demolding fixture is in direct contact with the glue, there will be a problem of difficulty in demolding after the glue dries, resulting in a low yield. Utility Model Content

[0005] To overcome the shortcomings mentioned above, this utility model provides a technical solution that can solve the above problems.

[0006] A waterproof sub-assembly structure for an internal rotor brushless motor stator, including a motor housing; A positioning cylinder is fixedly installed in the middle of the motor housing, and the outer wall of the positioning cylinder and the inner wall of the motor housing form a potting groove. The positioning cylinder is fitted with an annular iron core and an annular drive plate. The inner side of the annular iron core is formed with several winding grooves, which are arranged in a circular array. Copper wire windings are wound and installed in the several winding grooves of the annular iron core, and the copper wire windings are electrically connected to the annular drive plate. The potting groove is filled with adhesive, which, after drying, seals the annular iron core, annular drive plate, and copper wire winding within the potting groove.

[0007] Furthermore, insulating components are provided on both the upper and lower sides of the annular iron core. Several insertion positions are formed on the end of the insulating component near the annular iron core. The insertion positions are inserted into the winding slot of the annular iron core in a one-to-one gap fit. The copper wire winding is wound and installed in the insertion positions of the two insulating components and the winding slot of the annular iron core.

[0008] Furthermore: several buckles are formed on the insulating part near the annular drive plate, and buckle grooves are formed on the annular drive plate, with the buckles corresponding to each other and engaging in the buckle grooves.

[0009] Furthermore, an annular groove is formed in the middle of the motor housing, and the positioning cylinder is installed in the annular groove with a clearance fit at one end of the motor housing.

[0010] Furthermore, the outer side of the motor housing is formed with a filling hole, which is connected to the filling groove.

[0011] Furthermore: the annular drive plate is fixedly installed at one end of the positioning cylinder into the motor housing, and the annular drive plate and the annular iron core are fixedly connected to each other, with the injection hole located on the outside of the annular drive plate.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: the positioning cylinder is installed into the motor housing, so that the positioning cylinder and the motor housing form a potting groove. First, copper wire windings are wound and installed in the winding groove on the annular iron core. Then, the annular drive plate is fixed so that the copper wire windings and the annular drive plate are electrically connected to each other. After that, the annular iron core and the annular drive plate are installed together into the potting groove, and then the glue is filled to achieve stable sealing. This eliminates the cost of using demolding jigs and enables rapid processing and production with a high yield rate.

[0013] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a half-sectional structural diagram of the present invention; Figure 3 yes Figure 2A magnified structural diagram at point A; Figure 4 This is an exploded structural diagram of the present invention.

[0016] The figure shows: 1. Motor housing; 2. Positioning cylinder; 3. Encapsulation slot; 4. Annular iron core; 5. Annular drive plate; 6. Winding slot; 7. Rotor; 8. Permanent magnet ring; 9. Insulating component; 10. Plug-in position; 11. Buckle; 12. Buckle groove; 13. Annular groove; 14. Encapsulation hole. Detailed Implementation

[0017] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0018] The components of the present invention embodiments described and shown in the accompanying drawings can typically be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

[0019] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0020] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] like Figure 1-4As shown, the present invention discloses a waterproof sub-component structure for an internal rotor brushless motor stator, including a motor housing 1; A positioning cylinder 2 is fixedly installed in the middle of the motor housing 1, and the outer wall of the positioning cylinder 2 and the inner wall of the motor housing 1 form a potting groove 3. The positioning cylinder 2 is fitted with an annular iron core 4 and an annular drive plate 5. The inner side of the annular iron core 4 is formed with a number of winding grooves 6, which are arranged in a circular array. Copper wire windings are wound and installed in the winding grooves 6 of the annular iron core 4, and the copper wire windings are electrically connected to the annular drive plate 5. The potting groove 3 is filled with adhesive, and after the adhesive dries, it seals the annular iron core 4, the annular drive plate 5 and the copper wire winding in the potting groove 3. The principle is as follows: the positioning cylinder 2 is installed into the motor housing 1, so that the positioning cylinder 2 and the motor housing 1 form a potting groove 3. First, the copper wire winding is wound and installed in the winding groove 6 on the annular iron core 4. Then, the annular drive plate 5 is fixed so that the copper wire winding and the annular drive plate 5 are electrically connected to each other. After that, the annular iron core 4 and the annular drive plate 5 are installed together into the potting groove 3, and then the glue is filled to achieve stable sealing. This eliminates the cost of using demolding jigs and enables rapid processing and production with a high yield rate.

[0023] Furthermore: a rotor 7 is rotatably mounted inside the positioning cylinder 2, and a permanent magnet ring 8 is fixedly mounted on the outside of the rotor 7. When the copper wire winding is energized, it drives the permanent magnet ring 8 and the rotor 7 to rotate. A magnetic field is generated by energizing the copper wire winding, and this magnetic field will match the magnetic field of the permanent magnet ring 8, thereby driving the rotor 7 and the permanent magnet ring 8 to run at high speed, ensuring the stable operation of the motor, and also ensuring the waterproof performance of the motor.

[0024] Furthermore, insulating elements 9 are provided on both the upper and lower sides of the toroidal iron core 4. Several insertion positions 10 are formed on the end of the insulating element 9 near the toroidal iron core 4. The insertion positions 10 are inserted into the winding groove 6 of the toroidal iron core 4 with a gap fit. The copper wire winding is wound and installed in the insertion positions 10 of the two insulating elements 9 and the winding groove 6 of the toroidal iron core 4. The setting of the insulating element 9 can insulate and separate the copper wire winding and the toroidal iron core 4 from each other, which can ensure the winding accuracy of the copper wire winding, and at the same time speed up the winding speed of the copper wire winding, thus improving production efficiency.

[0025] Furthermore, the insulating component 9 near the annular drive plate 5 has several buckles 11 formed on it, and the annular drive plate 5 has buckle grooves 12 formed on it. The buckles 11 are installed in the buckle grooves 12 in a one-to-one fastening manner, which makes the installation of the annular drive plate 5 more stable.

[0026] Furthermore: an annular groove 13 is formed in the middle of the motor housing 1, and the positioning cylinder 2 is installed in the annular groove 13 with a clearance fit at one end of the motor housing 1; the setting of the annular groove 13 can ensure the accurate positioning of the positioning cylinder 2, thereby ensuring the stability of the motor rotor 7 when it runs at high speed.

[0027] Furthermore, the outer side of the motor housing 1 is formed with a filling hole 14, which is connected to the potting groove 3. The glue is poured into the potting groove 3 from the filling hole 14. By using the glue pouring process from low to high, the glue is fully filled into the gaps of the potting groove 3, the annular iron core 4, the annular drive plate 5, the winding groove 6 and the copper wire winding, avoiding glue leakage and insufficient glue, ensuring the glue filling effect. At the same time, there is no need to use a demolding fixture, which greatly improves the production efficiency of the motor.

[0028] Furthermore: the annular drive plate 5 is fixedly installed at one end of the positioning cylinder 2 into the motor housing 1, and the annular drive plate 5 and the annular iron core 4 are fixedly connected to each other. The injection hole 14 is located on the outside of the annular drive plate 5. The glue can be fully filled by injection from low to high, ensuring the glue injection effect and preventing glue leakage and insufficient glue.

[0029] This embodiment does not impose any limitation on the shape, material, structure, etc. of this utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this utility model shall fall within the protection scope of this utility model.

Claims

1. A waterproof sub-assembly structure for an internal rotor brushless motor stator, including a motor housing; Its features are: A positioning cylinder is fixedly installed in the middle of the motor housing, and the outer wall of the positioning cylinder and the inner wall of the motor housing form a potting groove. The positioning cylinder is fitted with an annular iron core and an annular drive plate. The inner side of the annular iron core is formed with several winding grooves, which are arranged in a circular array. Copper wire windings are wound and installed in the several winding grooves of the annular iron core, and the copper wire windings are electrically connected to the annular drive plate. The potting slot is filled with adhesive, which, after drying, seals the annular iron core, annular drive plate, and copper wire winding within the potting slot.

2. The waterproof sub-assembly structure of an internal rotor brushless motor stator according to claim 1, characterized in that: Insulating components are provided on both the upper and lower sides of the annular iron core. Several insertion positions are formed on the end of the insulating component near the annular iron core. The insertion positions are inserted into the winding slot of the annular iron core with a gap fit. The copper wire winding is wound and installed in the insertion positions of the two insulating components and the winding slot of the annular iron core.

3. The waterproof sub-assembly structure of an internal rotor brushless motor stator according to claim 2, characterized in that: Several buckles are formed on the insulating part near the annular drive plate, and buckle grooves are formed on the annular drive plate. The buckles are installed in the buckle grooves in a corresponding manner.

4. The waterproof sub-assembly structure of an internal rotor brushless motor stator according to claim 1, characterized in that: An annular groove is formed in the middle of the motor housing, and the positioning cylinder is installed in the annular groove with a clearance fit at one end of the motor housing.

5. The waterproof sub-assembly structure of an internal rotor brushless motor stator according to claim 1, characterized in that: The outer side of the motor housing is formed with a filling hole, which is connected to the filling groove.

6. The waterproof sub-assembly structure of an internal rotor brushless motor stator according to claim 5, characterized in that: The annular drive plate is fixedly installed at one end of the positioning cylinder into the motor housing, and the annular drive plate and the annular iron core are fixedly connected to each other. The injection hole is located on the outside of the annular drive plate.

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