Rotor magnet and rotor core positioning structure of inner rotor brushless motor

Abstract

The utility model discloses a rotor magnet and rotor core positioning structure of an inner rotor brushless motor, and relates to the technical field of brushless motors. The motor comprises a motor main body, a crankshaft is arranged in the motor main body, a rotor magnet and a rotor iron core are respectively arranged in the motor main body, the rotor magnet is arranged in the rotor iron core, the rotor magnet is of a cylinder structure, a first limiting plane is arranged on the side face of the rotor magnet, and the rotor iron core is of an annular structure. The inner wall of the rotor core is provided with a second limiting plane, and the first limiting plane is matched with the second limiting plane. According to the utility model, the rotor magnet is of a cylindrical structure, and the first limiting plane of the rotor magnet corresponds to the second limiting plane of the rotor iron core, so that when the bonding strength is unqualified due to less glue used for positioning or non-uniform coating, the bonding strength is not qualified; and the first limiting plane and the second limiting plane which are arranged between the rotor magnet and the rotor iron core are mutually limited and positioned.

Description

Technical Field

[0001] The utility model belongs to the technical field of brushless motors, and specifically relates to a positioning structure for the rotor magnet and the rotor iron core of an inner-rotor brushless motor. Background Art

[0002] A brushless motor is a typical mechatronic product that combines a motor body and a driver, and controls the operation of the motor electronically.

[0003] At present, there is no positioning design for the inner-rotor magnet and the rotor iron core of a brushless motor. A clearance fit is adopted and glue is used for fixing. Since glue is used to bond the rotor magnet and the rotor iron core, when the amount of glue used is small or the application is uneven, the bonding strength will be unqualified, the rotor iron core and the magnet will slip, and the motor will fail. Moreover, because the magnet design uses a cylinder, the internal volume cannot be increased, while this internal positioning step increases the internal volume of the magnet, and the magnetic density of the magnet also increases accordingly, resulting in an increase in the motor torque.

[0004] In view of this, the present utility model is specifically proposed. Content of the Utility Model

[0005] The technical problem to be solved by the present utility model is to overcome the deficiencies of the prior art and provide a positioning structure for the rotor magnet and the rotor iron core of an inner-rotor brushless motor.

[0006] To solve the above technical problem, the basic concept of the technical solution adopted by the present utility model is as follows:

[0007] A positioning structure for the rotor magnet and the rotor iron core of an inner-rotor brushless motor includes a motor body. A crankshaft is installed in the motor body. A rotor magnet and a rotor iron core are respectively installed in the motor body. The rotor magnet is installed in the rotor iron core. The rotor magnet has a cylindrical structure. A first limiting plane is provided on the side surface of the rotor magnet. The rotor iron core has an annular structure. A second limiting plane is provided on the inner wall of the rotor iron core. The first limiting plane and the second limiting plane are symmetrical to each other. A positioning step is provided in the rotor magnet.

[0008] Optionally, a cover is installed at one end of the motor body, and a wire groove is provided on the cover. By providing the wire groove, it is convenient to connect the motor body with an external circuit, so that the connected circuits are more neatly arranged.

[0009] Optionally, a control board is installed in the motor body, and the control board corresponds to the wire groove. By providing the control board, it can make the external circuit intelligent, automated, and improve the simplicity, safety, and personalized adjustment function of debugging.

[0010] Optionally, a bearing is installed inside the motor body, and the crankshaft is arranged inside the bearing. By providing the bearing, stable operation between the bearing and various components inside the motor can be ensured, thereby improving the operating efficiency and stability of the motor.

[0011] Optionally, a threaded groove is provided at one end of the crankshaft. By providing the threaded groove, it is convenient for the motor to be externally connected to a toy airplane blade or the like that requires a threaded mating connection method, making it more convenient and stable.

[0012] Optionally, a bracket is installed at one end of the motor body, and the bracket cooperates with the bearing. By providing the bracket, a flat type with a middle protrusion can be selected for the bracket. In this way, the protruding part can provide stable support and protection measures for the crankshaft inside the bearing in the motor during rotation, reduce the vibration of the motor, extend the service life of the motor, and ensure safe and stable operation.

[0013] After adopting the above technical solution, the present utility model has the following beneficial effects compared with the prior art. Of course, any product implementing the present utility model does not necessarily need to achieve all the advantages described below at the same time:

[0014] Due to the rotor magnet being in a cylindrical structure and the first limiting plane provided thereon corresponding to the second limiting plane of the rotor core, when the amount of glue used for positioning is small or the application is uneven, resulting in unqualified bonding strength, the first limiting plane and the second limiting plane provided between the rotor magnet and the rotor core will limit and position each other. As a result, the rotor magnet will not slip with the rotor core, avoiding motor failure, increasing the torque when the motor rotor is loaded, and improving the reliability of the motor. Due to the step provided in the rotor magnet, the magnetic density of the magnet is increased, enhancing the motor torque.

[0015] The following further describes in detail the specific embodiments of the present utility model with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The following drawings in the description are only some embodiments. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts. In the drawings:

[0017] Figure 1 is a schematic structural diagram of the motor body according to an embodiment of the present utility model;

[0018] Figure 2 is a schematic structural diagram of the rotor magnet according to an embodiment of the present utility model;

[0019] Figure 3 is a schematic structural diagram of the rotor core according to an embodiment of the present utility model;

[0020] In the accompanying drawings, the list of components represented by each reference numeral is as follows:

[0021] Motor main body 1, crankshaft 2, rotor magnet 3, rotor core 4, wire groove 5, control board 6, bearing 7, threaded groove 8, bracket 9, cover 10.

[0022] It should be noted that these accompanying drawings and text descriptions are not intended to limit the scope of the concept of the present utility model in any way, but to illustrate the concept of the present utility model to those skilled in the art by referring to specific embodiments. Detailed Description of the Specific Embodiment

[0023] Now, the present utility model will be further described in detail with reference to the accompanying drawings.

[0024] Please refer to Figures 1-3 As shown, in this embodiment, a positioning structure for the rotor magnet and rotor core of an inner rotor brushless motor is provided, including a motor main body 1. A crankshaft 2 is installed inside the motor main body 1. A rotor magnet 3 and a rotor core 4 are respectively installed inside the motor main body 1. The rotor magnet 3 is installed inside the rotor core 4. The rotor magnet 3 has a cylindrical structure. A first limiting plane is provided on the side surface of the rotor magnet 3. The rotor core 4 has an annular structure. A second limiting plane is provided on the inner wall of the rotor core 4. The first limiting plane corresponds to the second limiting plane. A positioning step is provided inside the rotor magnet 3.

[0025] By providing the rotor magnet 3, because it has a cylindrical structure itself, and the first limiting plane provided on itself corresponds to the second limiting plane of the rotor core 4. When the amount of glue used for positioning is small or the application is uneven, resulting in unqualified bonding strength, the first limiting plane and the second limiting plane provided between the rotor magnet 3 and the rotor core 4 will limit and position each other. Thus, the rotor magnet 3 will not slip with the rotor core 4, avoiding the failure of the motor main body 1, increasing the torque when the rotor of the motor main body 1 is loaded, and improving the reliability of the motor main body 1. By providing the step, because there is a step inside the rotor magnet 3, the magnetic density of the magnet is increased, enhancing the motor torque.

[0026] As Figure 1 shown, a cover 10 is installed at one end of the motor main body 1. A wire groove 5 is provided on the cover 10. By providing the wire groove 5, it is convenient for the motor main body 1 to be connected to the external circuit, making the distribution of the connected lines more orderly.

[0027] As Figure 2 shown, a control board 6 is installed inside the motor main body 1 of this embodiment. The control board 6 corresponds to the wire groove 5. By providing the control board 6, it can make the external circuit intelligent, automated, improve the simplicity and safety of debugging, and enhance the personalized adjustment function.

[0028] As shown Figure 2 As shown, a bearing 7 is installed in the motor main body 1 of this embodiment, and the crankshaft 2 is arranged in the bearing 7. By providing the bearing 7, it can ensure the stable operation between the bearing 7 and each component in the motor main body 1, thereby improving the operation efficiency and stability of the motor main body 1.

[0029] As shown Figure 1 As shown, a threaded groove 8 is provided at one end of the crankshaft 2 of this embodiment. By providing the threaded groove 8, it is convenient for the motor main body 1 to be externally connected to a toy plane blade or the like that requires a threaded mating connection method, making it more convenient and stable.

[0030] As shown Figure 2 As shown, a bracket 9 is installed at one end of the motor main body 1 of this embodiment, and the bracket 9 is matched with the bearing 7. By providing the bracket 9, the bracket 9 can be selected as a flat type with a middle protrusion. In this way, the protruding part can provide a stable support and protection measure for the crankshaft 2 in the bearing 7 of the motor main body 1 during rotation, reduce the vibration of the motor main body 1, extend the service life of the motor, and ensure the safe and stable operation.

[0031] The present utility model is not limited to the above embodiments. Anyone should know that structural changes made under the inspiration of the present utility model, as long as they have the same or similar technical solutions as the present utility model, all fall within the protection scope of the present utility model. The technologies, shapes, and structures not described in detail in the present utility model are all well-known technologies.

Claims

1. A rotor magnet and rotor core positioning structure for an inner rotor brushless motor, characterized in that: include: A motor body (1) is provided, wherein a crankshaft (2) is arranged in the motor body (1), a rotor magnet (3) and a rotor core (4) are arranged in the motor body (1), respectively, the rotor magnet (3) is arranged in the rotor core (4), the rotor magnet (3) is in a cylindrical structure, a first limiting plane is provided on the side surface of the rotor magnet (3), the rotor core (4) is in a circular ring structure, a second limiting plane is provided on the inner wall of the rotor core (4), the first limiting plane is symmetrical to the second limiting plane, and a positioning step is provided in the rotor magnet (3).

2. The inner rotor brushless motor rotor magnet and rotor core positioning structure according to claim 1, characterized in that: A cover (10) is mounted on one end of the motor body (1), and a wire groove (5) is formed on the cover (10).

3. The inner rotor brushless motor rotor magnet and rotor core positioning structure according to claim 2, characterized in that: A control panel (6) is installed in the motor body (1), and the control panel (6) corresponds to the wire slot (5).

4. The inner rotor brushless motor rotor magnet and rotor core positioning structure according to claim 1, characterized in that: A bearing (7) is installed in the motor body (1), and the crankshaft (2) is arranged in the bearing (7).

5. The inner rotor brushless motor rotor magnet and rotor core positioning structure according to claim 1, characterized in that: A thread groove (8) is formed at one end of the crankshaft (2).

6. The inner rotor brushless motor rotor magnet and rotor core positioning structure according to claim 4, characterized in that: A bracket (9) is mounted on one end of the motor body (1), and the bracket (9) is matched with the bearing (7).

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