Intermediate plate isolation structure and brushless motor

Abstract

The utility model relates to the technical field of motors, and discloses a center plate isolation structure and a brushless motor, wherein the center plate isolation structure includes a center plate assembly and a stator frame. The center plate assembly includes an A-phase center plate and a B-phase center plate; the stator frame is respectively formed with a first accommodating cavity and a second accommodating cavity for accommodating the A-phase center plate and the B-phase center plate, and an isolation layer is provided between the first accommodating cavity and the second accommodating cavity. The center plate isolation structure of the utility model solves the problem that electromagnetic interference is easily generated between the circuits of the A-phase coil and the B-phase coil when the motor rotates due to the center plates of different phases being bonded together, thereby affecting the normal operation of the brushless motor.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a middle plate isolation structure and a brushless motor. Background Art

[0002] The brushless motor consists of an electric motor body and a driver. It is a typical mechatronic product. The brushless motor senses the position of the permanent magnet poles through electronic devices (such as Hall elements), switches the direction of the current in the coil at the right time, and ensures that the magnetic force in the correct direction is generated to drive the motor. It has the advantages of high reliability, no commutation sparks, and low mechanical noise. Brushless DC motors are widely used in automobiles, home appliances, industrial equipment and other fields due to their high efficiency and low maintenance.

[0003] The center plate is an indispensable part of the brushless motor structure. In the related technology, the A-phase center plate and the B-phase center plate of the brushless motor are fitted together and respectively connected to the A-phase coil and the B-phase coil, thereby playing a role of magnetic conduction. However, since the center plates of different phases are fitted together, electromagnetic interference is easily generated between the circuits of the A-phase coil and the B-phase coil when the motor rotates, which in turn affects the normal operation of the brushless motor.

[0004] Therefore, it is urgent to solve the problem that electromagnetic interference is easily generated between the circuits of the A-phase coil and the B-phase coil when the motor rotates, thereby affecting the normal operation of the brushless motor. Utility Model Content

[0005] In order to solve the deficiencies of the prior art, the utility model provides a center plate isolation structure and a brushless motor, which avoids the problem that electromagnetic interference is easily generated between the circuits of the A-phase coil and the B-phase coil when the motor rotates due to the center plates of different phases being adhered together, thereby affecting the normal operation of the brushless motor.

[0006] The technical effects to be achieved by the utility model are achieved through the following aspects:

[0007] In a first aspect, the utility model provides a middle plate isolation structure, comprising:

[0008] A middle plate assembly, comprising an A-phase middle plate and a B-phase middle plate; and

[0009] The stator frame is formed with a first accommodating cavity and a second accommodating cavity for accommodating the A-phase intermediate plate and the B-phase intermediate plate, respectively, and an isolation layer is provided between the first accommodating cavity and the second accommodating cavity.

[0010] In some implementations, the A-phase intermediate plate and the B-phase intermediate plate respectively protrude from the outer peripheral wall of the isolation layer.

[0011] In this implementation, the A-phase intermediate plate and the B-phase intermediate plate respectively protrude from the outer peripheral wall of the isolation layer, thereby avoiding the problem of poor magnetic conductivity caused by the interference of the A-phase intermediate plate and the B-phase intermediate plate by the isolation layer.

[0012] In some implementations, the isolation distance between the A-phase intermediate plate and the B-phase intermediate plate is not less than 0.5 mm.

[0013] In this implementation, the problem of electromagnetic interference between the A-phase intermediate plate and the B-phase intermediate plate is avoided, and at the same time, the compactness of the overall structure is ensured.

[0014] In some implementations, the A-phase intermediate plate and the B-phase intermediate plate are respectively provided with avoidance holes, and together with the first accommodating cavity and the second accommodating cavity, they form an installation cavity for installing the rotor assembly.

[0015] In some implementations, the A-phase intermediate plate and the B-phase intermediate plate are respectively formed integrally with the stator frame.

[0016] In this implementation, the A-phase intermediate plate and the B-phase intermediate plate are respectively integrally formed with the stator frame by injection molding, which reduces the production process and thus reduces the production cost, further shortens the assembly process and assembly time, thereby improving the overall production efficiency of the brushless motor.

[0017] Furthermore, the stator frame also includes an A-phase coil accommodating groove and a B-phase coil accommodating groove, and the isolation layer is arranged between the A-phase coil accommodating groove and the B-phase coil accommodating groove.

[0018] In this implementation, the isolation layer is disposed between the A-phase coil accommodating groove and the B-phase coil accommodating groove, and serves to isolate the A-phase intermediate plate and the B-phase intermediate plate, respectively.

[0019] In a second aspect, the utility model provides a brushless motor, including a rotor assembly, a housing assembly and the above-mentioned intermediate plate isolation structure, wherein the rotor assembly is installed in the installation cavity of the stator frame, and an installation cavity for installing the stator frame is formed inside the housing assembly.

[0020] In some implementations, a bearing and a mounting plate are further included. The bearing is sleeved at both ends of the rotor assembly, and the mounting plate is respectively connected to the bearing and the bottom of the housing assembly.

[0021] In this implementation, the mounting plate is connected to the bearing and is used to fix the bearing so that the rotor assembly can rotate stably, avoiding the problem of shaking during the rotation of the rotor assembly, thereby ensuring the normal operation of the brushless motor.

[0022] In some implementations, a boss for limiting sliding movement of the mounting plate extends from a side of the bearing away from the device cavity.

[0023] In this implementation, by providing a boss on the bearing, the connection between the bearing and the mounting plate is made more stable, thereby improving the overall structural stability.

[0024] In some implementations, the center plate assembly extends with a snap-in portion, the shell assembly is provided with a snap-in interface, and the snap-in portion is snap-into the snap-in interface so that the stator frame is snap-into the shell assembly.

[0025] In summary, the utility model has at least the following benefits:

[0026] The intermediate plate isolation structure provided by the utility model has an interval arrangement between the intermediate plate of phase A and the intermediate plate of phase B, so that the intermediate plates of different phases are separated by a certain distance, thereby preventing the A-phase coil and the B-phase coil from generating electromagnetic interference when the motor rotates, thereby solving the problem that electromagnetic interference is easily generated between the circuits of the A-phase coil and the B-phase coil when the motor rotates due to the intermediate plates of different phases being bonded together, thereby affecting the normal operation of the brushless motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the intermediate plate isolation structure of some embodiments;

[0028] Figure 2 for Figure 1 Another perspective structural schematic diagram of the intermediate plate isolation structure shown;

[0029] Figure 3 for Figure 2 The schematic diagram of the structure of the middle plate assembly and the stator frame shown;

[0030] Figure 4 Schematic diagram of the structure of the A-phase coil and the B-phase coil in some embodiments;

[0031] Figure 5 It is a schematic diagram of the structure of the brushless motor of some embodiments;

[0032] Figure 6 for Figure 5 Another structural schematic diagram of the brushless motor shown;

[0033] Figure 7 for Figure 6 A cross-sectional schematic diagram of a brushless motor shown;

[0034] Figure 8 Schematic diagram of the structure of bearings and mounting plates in some embodiments.

[0035] Markings in the figure:

[0036] 10. Middle plate isolation structure;

[0037] 100, intermediate plate assembly; 110, intermediate plate of phase A; 111, avoidance hole; 120, intermediate plate of phase B; 130, clamping part;

[0038] 200, stator frame; 201, first accommodating cavity; 202, second accommodating cavity; 203, mounting cavity; 210, isolation layer; 205, A-phase coil accommodating groove; 206, B-phase coil accommodating groove; 220, A-phase coil; 230, B-phase coil;

[0039] 20. Brushless motor;

[0040] 300, rotor assembly;

[0041] 400, housing assembly; 401, device cavity; 402, card interface;

[0042] 500, bearing; 510, boss;

[0043] 600, mounting plate; 601, mounting through hole. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solution and advantages of the implementation of the utility model clearer, the technical solution in the implementation of the utility model will be clearly and completely described below in conjunction with the drawings in the implementation of the utility model. The described implementation is a part of the implementation of the utility model, not all of the implementations.

[0045] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0046] Embodiment 1:

[0047] Please see attached Figure 1~2 The intermediate plate isolation structure 10 of the present invention includes an intermediate plate assembly 100 and a stator frame 200 .

[0048] Please combine Figure 1 and Figure 2 , Figure 1 and Figure 2The schematic diagram shows the structural relationship between the intermediate plate assembly 100 and the stator frame 200 in the embodiment of the utility model. Specifically, the intermediate plate assembly 100 includes an A-phase intermediate plate 110 and a B-phase intermediate plate 120; the stator frame 200 is formed with a first accommodating cavity 201 and a second accommodating cavity 202 for accommodating the A-phase intermediate plate 110 and the B-phase intermediate plate 120, respectively, and an isolation layer 210 is provided between the first accommodating cavity 201 and the second accommodating cavity 202.

[0049] Specifically, the central plate assembly 100 plays a role of magnetic conductivity, ensuring the normal operation of the brushless motor 20. In this embodiment, the A-phase central plate 110 and the B-phase central plate 120 are respectively accommodated in the first accommodation cavity 201 and the second accommodation cavity 202, so that the connection between the central plate assembly 100 and the stator frame 200 is more stable, thereby improving the overall stability and avoiding the problem of unstable connection between the central plate assembly 100 and the stator frame 200 during the operation of the brushless motor 20, thereby causing shaking. Because an isolation layer 210 is provided between the first accommodating cavity 201 and the second accommodating cavity 202, a certain distance is separated between the A-phase intermediate plate 110 and the B-phase intermediate plate 120. Since the A-phase intermediate plate 110 and the B-phase intermediate plate 120 are spaced apart from each other, the problem of electromagnetic interference between the circuits of the A-phase coil 220 and the B-phase coil 230 being easily generated when the motor rotates due to the intermediate plates of different phases being adhered together is avoided, thereby affecting the normal operation of the brushless motor 20.

[0050] The above-mentioned intermediate plate isolation structure 10, due to the interval between the A-phase intermediate plate 110 and the B-phase intermediate plate 120, makes the intermediate plates of different phases separated by a certain distance, so that the A-phase coil 220 and the B-phase coil 230 do not generate electromagnetic interference when the motor rotates, and solves the problem that due to the intermediate plates of different phases being attached together, the circuits of the A-phase coil 220 and the B-phase coil 230 are prone to electromagnetic interference when the motor rotates, thereby affecting the normal operation of the brushless motor 20.

[0051] In some preferred embodiments, the A-phase intermediate plate 110 and the B-phase intermediate plate 120 are respectively protruded from the outer peripheral wall of the isolation layer 210. This avoids the problem that the A-phase intermediate plate 110 and the B-phase intermediate plate 120 are respectively disturbed by the isolation layer 210, resulting in poor magnetic conductivity. Furthermore, the overall structure of the intermediate plate isolation structure 10 is made more compact, the occupied space is reduced, and the brushless motor 20 is more suitable for equipment with a smaller installation space.

[0052] In some more preferred embodiments, the isolation distance between the A-phase intermediate plate 110 and the B-phase intermediate plate 120 is not less than 0.5 mm. This avoids the problem of electromagnetic interference between the A-phase intermediate plate 110 and the B-phase intermediate plate 120, and at the same time, ensures the compactness of the overall structure. In addition, the intermediate plate isolation structure 10 has a simple structure, is easy to produce and install, and thus improves the production and installation efficiency of the brushless motor 20.

[0053] Embodiment 2:

[0054] The difference between this embodiment and embodiment 1 is that this embodiment further optimizes the structure of the intermediate plate isolation structure 10 of the utility model, see Figure 3~4 .

[0055] Among them, see Figure 3 , Figure 3 The specific structure of the A-phase intermediate plate 110 and the B-phase intermediate plate 120 in the embodiment of the utility model is illustrated. Specifically, the A-phase intermediate plate 110 and the B-phase intermediate plate 120 are respectively provided with avoidance holes 111, and together with the first accommodating cavity 201 and the second accommodating cavity 202, form an installation cavity 203 for installing the rotor assembly 300.

[0056] In this embodiment, the rotor assembly 300 is installed in the installation cavity 203 formed by the A-phase center plate 110, the B-phase center plate 120, the first accommodating cavity 201 and the second accommodating cavity 202. While ensuring that the A-phase center plate 110 and the B-phase center plate 120 play a magnetic conductive role, the overall structure of the brushless motor 20 is more compact, thereby improving the compactness of the overall structure. At the same time, it also protects the rotor assembly 300, thereby preventing the rotor assembly 300 from scratching against external equipment during rotation, thereby causing malfunctions or wear problems.

[0057] In some preferred embodiments, the A-phase intermediate plate 110 and the B-phase intermediate plate 120 are respectively integrally formed with the stator frame 200. In the present embodiment, the A-phase intermediate plate 110 and the B-phase intermediate plate 120 are respectively integrally formed with the stator frame 200 by injection molding, and the integral molding process can well ensure the spacing accuracy between the A-phase intermediate plate 110 and the B-phase intermediate plate 120, and the product consistency is better. At the same time, the production process is reduced, thereby reducing the production cost, further reducing the assembly process and assembly time, thereby improving the overall production efficiency of the brushless motor 20. It can be understood that in some other embodiments, the A-phase intermediate plate 110 and the B-phase intermediate plate 120 are not limited to being integrally formed with the stator frame 200, and can also be fixedly connected by means of clamping, embedding or welding.

[0058] In some more preferred embodiments, see Figure 3 , Figure 3The specific structure of the stator frame 200 in the embodiment of the utility model is illustrated. Specifically, the stator frame 200 also includes an A-phase coil accommodating groove 205 and a B-phase coil accommodating groove 206, and the isolation layer 210 is arranged between the A-phase coil accommodating groove 205 and the B-phase coil accommodating groove 206. The A-phase coil accommodating groove 205 and the B-phase coil accommodating groove 206 are used to install the A-phase coil 220 and the B-phase coil 230 respectively, so that the brushless motor 20 can operate normally; the isolation layer 210 is arranged between the A-phase coil accommodating groove 205 and the B-phase coil accommodating groove 206, and plays the role of isolating the A-phase intermediate plate 110 and the B-phase intermediate plate 120 respectively, so that the A-phase intermediate plate 110 and the B-phase intermediate plate 120 are separated by a certain distance, while ensuring that the A-phase intermediate plate 110 and the B-phase intermediate plate 120 play a magnetic conductive role respectively, and avoiding the problem of electromagnetic interference between the A-phase intermediate plate 110 and the B-phase intermediate plate 120.

[0059] For further information, see Figure 4 , Figure 4 The schematic diagram shows the structural relationship between the stator frame 200 and the A-phase coil 220 and the B-phase coil 230 in the embodiment of the utility model. Specifically, the stator frame 200 also includes the A-phase coil 220 and the B-phase coil 230, and the A-phase coil 220 and the B-phase coil 230 are respectively installed in the A-phase coil accommodating groove 205 and the B-phase coil accommodating groove 206, making the overall structure more compact, thereby improving the structural compactness of the brushless motor 20.

[0060] Embodiment 3:

[0061] This embodiment provides a brushless motor 20 based on the above embodiment. Figures 5 to 8 .

[0062] A brushless motor 20 includes a rotor assembly 300 , a housing assembly 400 and a center plate isolation structure 10 .

[0063] Among them, see Figure 5 , Figure 5 The structure relationship among the rotor assembly 300, the housing assembly 400 and the intermediate plate isolation structure 10 in the embodiment of the utility model is illustrated. Specifically, the rotor assembly 300 is installed in the installation cavity 203 of the stator frame 200, and the housing assembly 400 is formed with an installation cavity 401 for installing the stator frame 200.

[0064] Specifically, the brushless motor 20 uses semiconductor switching devices to achieve electronic commutation, that is, the electronic switching devices replace the traditional contact commutator and brushes. It has the advantages of high reliability, no commutation sparks, low mechanical noise, etc., and is widely used in high-end recorders, video recorders, electronic instruments, automated office equipment and industrial equipment.

[0065] In this embodiment, the installation cavity 203 of the stator frame 200 protects the rotor assembly 300, preventing the rotor assembly 300 from rubbing against external equipment during rotation, thereby causing a malfunction; the installation cavity 401 of the shell assembly 400 protects the stator frame 200, preventing the stator frame 200 from scratching against external equipment, thereby causing wear; at the same time, it also makes the overall structure more compact, reduces the occupied space, and makes the brushless motor 20 more suitable for use in equipment with smaller installation space.

[0066] In some preferred embodiments, please combine Figure 6 and Figure 7 , Figure 6 and Figure 7 The specific structure of the brushless motor 20 in the embodiment of the utility model is illustrated. Specifically, it also includes a bearing 500 and a mounting plate 600. The bearing 500 is sleeved at both ends of the rotor assembly 300, and the mounting plate 600 is respectively connected to the bearing 500 and the bottom of the housing assembly 400. Specifically, the bearing 500 reduces the friction between the rotor assembly 300 and the mounting plate 600, so that the rotor assembly 300 rotates more smoothly and reduces energy consumption. In this embodiment, the mounting plate 600 is connected to the bearing 500 and is used to fix the bearing 500 so that the rotor assembly 300 rotates stably, avoiding the problem of shaking during the rotation of the rotor assembly 300, thereby ensuring the normal operation of the brushless motor 20.

[0067] In some preferred embodiments, the mounting plate 600 is provided with a mounting through hole 601 for mounting the bearing 500 , so that the overall structure is more compact, thereby reducing the space occupied by the brushless motor 20 .

[0068] In some more preferred embodiments, please combine Figure 6 and Figure 7 , Figure 6 and Figure 7 The structural relationship between the clamping part 130 and the clamping interface 402 in the embodiment of the utility model is illustrated. Specifically, the central plate assembly 100 extends with the clamping part 130, and the housing assembly 400 is provided with the clamping interface 402, and the clamping part 130 is clamped in the clamping interface 402, so that the stator frame 200 is clamped in the housing assembly 400. The connection between the stator frame 200 and the housing assembly 400 is made more stable, avoiding the problem of the stator frame 200 shaking during the rotation of the brushless motor 20, thereby improving the overall stability of the brushless motor 20.

[0069] In some preferred embodiments, see Figure 8 , Figure 8The structural relationship between the bearing 500 and the mounting plate 600 in the embodiment of the utility model is illustrated. Specifically, a boss 510 for limiting the sliding of the mounting plate 600 is extended from the side of the bearing 500 away from the device cavity 401. The connection between the bearing 500 and the mounting plate 600 is made more stable, thereby improving the overall structural stability. Moreover, by providing the boss 510, since the boss 510 limits the sliding of the mounting plate 600, the installation between the rotor assembly 300, the mounting plate 600 and the bearing 500 is also made more convenient, thereby improving the installation efficiency.

[0070] The brushless motor 20 of the present invention is provided with an interval between the A-phase intermediate plate 110 and the B-phase intermediate plate 120, so that the intermediate plates of different phases are separated by a certain distance, thereby preventing the A-phase coil 220 and the B-phase coil 230 from generating electromagnetic interference when the motor rotates, thereby solving the problem that electromagnetic interference is easily generated between the circuits of the A-phase coil 220 and the B-phase coil 230 when the motor rotates due to the intermediate plates of different phases being attached together, thereby affecting the normal operation of the brushless motor 20.

[0071] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0072] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0073] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0074] In the present utility model, unless otherwise clearly specified and limited, a feature being above or below a second feature may include being in direct contact with the second feature, or may include being in contact with the second feature through another feature between them instead of being in direct contact. Moreover, a feature being above, above, and above the second feature includes being directly above and obliquely above the second feature, or simply means that the feature is higher in level than the second feature. A feature being below, below, and below the second feature includes being directly below and obliquely below the second feature, or simply means that the feature is lower in level than the second feature.

[0075] Although the utility model is described in conjunction with the above specific embodiments, it is obvious that those skilled in the art can make many substitutions, modifications and changes based on the above content. Therefore, all such substitutions, improvements and changes are included in the spirit and scope of the appended claims.

Claims

1. A middle plate isolation structure, characterized in that: include: A middle electrode plate assembly (100), comprising an A-phase middle electrode plate (110) and a B-phase middle electrode plate (120); as well as The stator frame (200) is respectively formed with a first accommodating cavity (201) and a second accommodating cavity (202) for accommodating the A-phase intermediate plate (110) and the B-phase intermediate plate (120), and an isolation layer (210) is provided between the first accommodating cavity (201) and the second accommodating cavity (202).

2. The intermediate plate isolation structure according to claim 1, characterized in that: The A-phase intermediate plate (110) and the B-phase intermediate plate (120) respectively protrude from the outer peripheral wall of the isolation layer (210).

3. The intermediate plate isolation structure according to claim 1, characterized in that: The isolation distance between the A-phase intermediate plate (110) and the B-phase intermediate plate (120) is not less than 0.5 millimeters.

4. The intermediate plate isolation structure according to claim 1, characterized in that: The A-phase intermediate plate (110) and the B-phase intermediate plate (120) are respectively provided with avoidance holes (111), which together with the first accommodating cavity (201) and the second accommodating cavity (202) form an installation cavity (203) for installing a rotor assembly (300).

5. The intermediate plate isolation structure according to claim 1, characterized in that: The A-phase intermediate plate (110) and the B-phase intermediate plate (120) are respectively formed integrally with the stator frame (200).

6. The intermediate plate isolation structure according to claim 1, characterized in that: The stator frame (200) further comprises an A-phase coil accommodating groove (205) and a B-phase coil accommodating groove (206), and the isolation layer (210) is arranged between the A-phase coil accommodating groove (205) and the B-phase coil accommodating groove (206).

7. A brushless motor, characterized in that: The invention comprises a rotor assembly (300), a shell assembly (400), and a middle plate isolation structure (10) according to any one of claims 1 to 6, wherein the rotor assembly (300) is installed in a mounting cavity (203) of the stator frame (200), and a mounting cavity (401) for mounting the stator frame (200) is formed inside the shell assembly (400).

8. The brushless motor according to claim 7, characterized in that: It also includes a bearing (500) and a mounting plate (600), wherein the bearing (500) is sleeved on both ends of the rotor assembly (300), and the mounting plate (600) is respectively connected to the bearing (500) and the bottom of the housing assembly (400).

9. The brushless motor according to claim 8, characterized in that: A boss (510) for limiting the sliding of the mounting plate (600) extends from one side of the bearing (500) away from the device cavity (401).

10. The brushless motor according to claim 7, characterized in that: The intermediate plate assembly (100) is extended with a clamping portion (130), the housing assembly (400) is provided with a clamping interface (402), and the clamping portion (130) is clamped in the clamping interface (402) so that the stator frame (200) is clamped to the housing assembly (400).

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