A wind-cooled internal rotor motor
By integrating the impeller and magnetic ring into a single unit and connecting them with a key, the structural damage problem during the assembly of the impeller in the air-cooled internal rotor motor is solved, ensuring the motor's balance and performance, and avoiding vibration and noise.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHONGSHAN GCHIMAY ELECTRIC APPLIANCE
- Filing Date
- 2025-05-28
- Publication Date
- 2026-06-09
AI Technical Summary
Existing air-cooled internal rotor motors are prone to structural damage during impeller assembly, resulting in poor dynamic balance, vibration, and noise, which affects motor performance.
The impeller and magnetic ring are integrally molded and fixed to the spindle by key connection, avoiding hammering or pressing and ensuring the balance of the impeller.
This ensures that the wind turbine does not generate vibration or noise during high-speed rotation, thus guaranteeing the dynamic balance and performance of the motor.
Smart Images
Figure CN224343042U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of motors, and in particular to an air-cooled internal rotor motor. Background Technology
[0002] Currently, air-cooled internal rotor motors require separate impeller assembly. When assembling the impeller, methods such as hammering and pressing are used for installation. This method not only easily damages the impeller's structural integrity but also results in poor impeller balance after installation. This leads to uneven vibration and noise during motor rotation, making it difficult to ensure motor performance. Utility Model Content
[0003] This utility model provides an air-cooled internal rotor motor, the purpose of which is to solve the problem that the dynamic balance of the existing air-cooled internal rotor motor is affected by the installation of the impeller, thus affecting the motor performance.
[0004] To achieve the above objectives, embodiments of this utility model provide an air-cooled internal rotor motor, comprising:
[0005] The rotor structure includes a magnetic ring, a spindle is disposed at the center of the magnetic ring, the spindle passes through the magnetic ring, and a fan wheel is disposed on the spindle, the fan wheel being fixedly connected to the end face of the magnetic ring;
[0006] A stator structure is disposed outside the rotor structure, and the stator structure drives the rotor structure to rotate via a magnetic field.
[0007] Preferably, the wind turbine includes a core and blades, with a plurality of blades fixed to the core in a trumpet shape. The core is fitted with the spindle with a gap. One end of the blade that contacts the core is a fixed end, and the other end is a free end. The free end is fixedly connected to the end face of the magnetic ring.
[0008] Preferably, the magnetic ring and the wind turbine are integrally injection molded.
[0009] Preferably, the stator structure includes a stator ring and a stator winding wound on the stator ring, wherein the stator ring is disposed on the periphery of the rotor structure.
[0010] Preferably, the air-cooled internal rotor motor further includes a housing, the stator structure and the rotor structure are disposed within the housing, and one end of the spindle passes through the end face of the housing.
[0011] Preferably, the two end faces of the housing are further provided with deep groove ball bearings, and the two ends of the mandrel pass through the inner rings of the deep groove ball bearings.
[0012] Preferably, each end of the mandrel is provided with a retaining ring, which is used to prevent the mandrel from moving axially relative to the two deep groove ball bearings.
[0013] The above-mentioned solution of this utility model has the following beneficial effects:
[0014] Unlike existing technologies where the impeller and magnetic ring are driven by a spindle, this application integrates the impeller and magnetic ring into a single unit, and the spindle and magnetic ring are fixed together by a key connection. Therefore, during assembly, there is no need to hammer or press the impeller, ensuring the balance of the impeller and magnetic ring and preventing vibration and noise from the impeller during high-speed rotation.
[0015] Other features and advantages of this invention will be described in detail in the following detailed description section. Attached Figure Description
[0016] Figure 1 This is a cross-sectional view of the present invention.
[0017] [Explanation of Labels in the Attached Image]
[0018] 1-Magnetic ring, 2-Mandrel, 3-Wind impeller, 4-Stator ring, 5-Housing, 6-Deep groove ball bearing, 7-Snap ring. Detailed Implementation
[0019] To make the technical problems, technical solutions and advantages of this utility model clearer, a detailed description will be given below in conjunction with the accompanying drawings and specific embodiments.
[0020] like Figure 1 As shown, an embodiment of this utility model provides an air-cooled internal rotor motor, including a rotor structure and a stator structure. The rotor structure includes a magnetic ring 1, with a spindle 2 disposed at the center of the magnetic ring 1. The spindle 2 passes through the magnetic ring 1 along its axial direction, and the spindle 2 and the magnetic ring 1 are connected by a key. The two axial surfaces of the magnetic ring 1 are the end faces. A fan 3 is also sleeved on the spindle 2, with a gap between the fan 3 and the spindle 2. The fan 3 is also fixedly connected to one end face of the magnetic ring 1. The stator structure is disposed outside the rotor structure. Similar to the prior art, the stator structure drives the rotor structure to rotate around the axial direction of the spindle 2 through a magnetic field.
[0021] Unlike existing technologies, the power transmission between the impeller 3 and the rotor is not through the rotation of the spindle 2, but through the fixed connection between the impeller 3 and the magnetic ring 1. The spindle 2 and the magnetic ring 1 are connected by a key. Therefore, when assembling the impeller 3, there is no need to use pressing, hammering or other methods, which ensures that the structure of the impeller 3 is not damaged and avoids affecting the dynamic balance of the impeller 3 after assembly.
[0022] Furthermore, the wind turbine 3 also includes a core and blades. The core is annular, and its inner diameter is larger than that of the spindle 2, allowing a radial gap to be created between the core and the spindle 2 when the core is fitted over the spindle 2. Several blades are divided into two ends: one fixed end for fixing to the core, and the other free end for fixing to the end face of the magnetic ring 1. The blades are fixed to the core in a trumpet shape.
[0023] Because of the radial gap between the wheel core and the spindle 2, the rotational power of the wind turbine 3 comes from the rotation of the magnetic ring 1.
[0024] Furthermore, to ensure the connection strength between the impeller and the magnetic ring 1, the impeller and the magnetic ring 1 are integrally injection molded. Preferably, the impeller, the magnetic ring 1, and the impeller core are integrally molded.
[0025] The aforementioned stator structure includes a stator ring 4, on which stator windings (not shown in the figure) are wound. The way the stator windings are wound on the stator ring 4 can refer to existing stator structures. The stator ring 4 is located on the periphery of the rotor structure. When current is applied to the stator windings, the rotor structure can be driven to rotate around the spindle 2 within the stator structure.
[0026] The air-cooled internal rotor motor also includes a housing 5. Both the stator and rotor structures are housed within the housing 5, and the stator structure is fixed to the inner wall of the housing 5. One end of the spindle 2 passes through one end face of the housing 5, while the other end does not pass through the other end face of the housing 5. The protruding end of the spindle 2 is used for power output.
[0027] Preferably, deep groove ball bearings 6 are also provided on the two end faces of the housing 5, and the two ends of the spindle 2 are fixedly connected to the inner ring of the deep groove ball bearing 6, and the outer ring of the deep groove ball bearing 6 is fixedly connected to the end face of the housing 5.
[0028] Preferably, retaining rings 7 are provided at both ends of the mandrel 2, and the retaining rings 7 are used to prevent the mandrel 2 from moving axially relative to the two deep groove ball bearings 6.
[0029] Specifically, one retaining ring 7 is engaged with the lower end of the spindle 2 and is located above the lower deep groove ball bearing 6, while the other retaining ring 7 is engaged with the middle of the spindle 2 and is located below the upper deep groove ball bearing 6.
[0030] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.
Claims
1. A wind-cooled internal rotor motor, characterized in that, include: The rotor structure includes a magnetic ring (1), a spindle (2) is provided at the center of the magnetic ring (1), the spindle (2) is keyed to the magnetic ring (1), and a fan wheel (3) is also provided on the spindle (2), the fan wheel (3) is fixedly connected to the end face of the magnetic ring (1); A stator structure is disposed outside the rotor structure, and the stator structure drives the rotor structure to rotate via a magnetic field.
2. The air-cooled internal rotor motor according to claim 1, characterized in that: The wind turbine (3) includes a core and blades. Several blades are fixed on the core in a trumpet shape. The core is fitted with the spindle (2) with a gap. One end of the blade that contacts the core is a fixed end, and the other end is a free end. The free end is fixedly connected to the end face of the magnetic ring (1).
3. The air-cooled internal rotor motor according to claim 2, characterized in that: The magnetic ring (1) and the wind turbine (3) are integrally injection molded.
4. The air-cooled internal rotor motor according to claim 1, characterized in that: The stator structure includes a stator ring (4) and a stator winding wound on the stator ring (4), wherein the stator ring (4) is disposed on the periphery of the rotor structure.
5. The air-cooled internal rotor motor according to claim 1, characterized in that: The air-cooled internal rotor motor also includes a housing (5), the stator structure and the rotor structure are disposed inside the housing (5), and one end of the spindle (2) passes through the end face of the housing (5).
6. The air-cooled internal rotor motor according to claim 5, characterized in that: The two end faces of the housing (5) are also provided with deep groove ball bearings (6), and the two ends of the spindle (2) pass through the inner ring of the deep groove ball bearings (6).
7. The air-cooled internal rotor motor according to claim 6, characterized in that: The mandrel (2) is provided with retaining rings (7) at both ends, and the retaining rings (7) are used to prevent the mandrel (2) from moving axially relative to the two deep groove ball bearings (6).