Outer rotor brushless motor driven by drum of washing machine

Abstract

The utility model provides an outer rotor brushless motor driven by a washing machine roller, the motor comprises a stator end and a rotor end, the stator end is provided with a coil group, the coil group is arranged on the circumferential surface of the stator, the rotor end is sleeved outside the coil group, the inner side of the rotor end is provided with a permanent magnet, an air gap is formed between the permanent magnet and the coil group, and the permanent magnet is arranged in the air gap. A hollow frame is formed on a rear shell of the stator end, the hollow frame forms a fixed end face at the rear end of the motor, the fixed end face is contacted and fixed with a motor fixing frame, an output end is formed at the front end of the rotor end, a step body and an output shaft are formed on the output end, the step body is integrally formed on the rotor end, and the output shaft is formed at the axis of the step body. The stator end is of a fixed structure and is provided with a hollowed-out frame used for fixing, the hollowed-out frame can be provided with a fixing piece used for fixing the motor, large-torque output can be achieved, and the washing machine is suitable for working of a large-drum and large-capacity washing machine.

Description

Technical Field

[0001] The utility model relates to an improved structure of a motor for household appliances, in particular to an outer rotor brushless motor driven by a washing machine drum. Background Art

[0002] The motor in the washing machine is a power structure used to drive the drum. The rotation of the motor realizes the kneading, washing, and dehydration of the clothes in the drum. Conventional motors use inner rotor motors with the rotor on the inside of the motor. The driving ability for large loads is weak, especially when washing in winter, when the weight of clothes is generally heavy. The load of the motor is high for a long time, affecting the normal operation of the motor. Therefore, it is considered to use an outer rotor motor. The rotating part of the outer rotor motor is on the outside, and its rotational inertia is large, which can meet the requirements of large load work. In this way, the outer rotor motor is improved to make it suitable for operation in the working conditions of the washing machine. Utility Model Content

[0003] The utility model aims to overcome the above-mentioned deficiencies in the prior art and to provide an outer rotor brushless motor for driving a washing machine drum.

[0004] The technical solution adopted by the utility model to solve the above problems is: the motor includes a stator end and a rotor end, the stator end has a coil group, the coil group is arranged on the circumferential surface of the stator, the rotor end is sleeved on the outside of the coil group, the inner side of the rotor end is provided with a permanent magnet, an air gap is formed between the permanent magnet and the coil group, the rear shell of the stator end is formed with a hollow frame, the hollow frame forms a fixed end face at the rear end of the motor, the fixed end face contacts and is fixed with the motor fixed frame, the front end of the rotor end is formed as an output end, which is formed with a step body and an output shaft, the step body is integrally formed on the rotor end, and the output shaft is formed at the axis of the step body. The stator end is a fixed structure, which is provided with a hollow frame for fixing, the hollow frame can be installed with a fixing part for fixing the motor, the rotor end has an output part, and a reliable driving structure is formed, which can effectively adapt to the installation space of the washing machine, and avoid the influence of the working vibration of the washing machine on the motor, and can achieve a large torque output, which is suitable for the operation of large drums and large capacity washing machines.

[0005] Furthermore, the hollow frame is integrally formed on the housing structure at the stator end, and the hollow frame is formed with a plurality of mounting holes open to the internal space of the motor, and fixing parts are installed in the mounting holes to fix the hollow frame to the motor fixing frame. The hollow frame has mounting holes, and the mounting holes can fix the fixing parts to the fixing frame from the inside of the motor, which can achieve short-distance fixing, facilitate direct drive of the motor in the washing machine structure, and improve the working efficiency of the drum.

[0006] Furthermore, the mounting holes are formed in multiple numbers at the corners of the housing at the stator end and are arranged circumferentially, and the supporting solid structure between the mounting holes forms the supporting part of the hollow frame. The mounting holes are arranged at the corners to increase the opening distance, facilitate installation, and form a supporting structure with strong installation stability.

[0007] Furthermore, a heat dissipation hole is formed on the rotor end, the heat dissipation hole is located on the outer diameter of the rotor end, and penetrates the housing part of the rotor end, and the air gap between the coil group and the permanent magnet is open to the heat dissipation hole. The function of the heat dissipation hole is to form an airflow between the rotor and the stator structure to achieve rapid cooling, which is suitable for the high-torque working state of the motor.

[0008] Furthermore, a fixing groove is formed on the inner side of the housing of the rotor end, and the fixing groove is a wedge-shaped structure with a small inner distance and a large outer distance. The side edges of the permanent magnet are correspondingly formed into a relative oblique edge structure and are tightly fixed in the fixing groove. The fixing groove forms an inward locking and clamping function, and the permanent magnet is tightly clamped by the fixing groove to form a reliable structure, thereby avoiding loosening caused by the motor in a high-speed rotating working state and improving the reliability of the motor operation.

[0009] Compared with the prior art, the utility model has the following advantages and effects: the motor of the present design is a structural improvement suitable for the working environment of a washing machine, which improves the reliability of the fixed installation of the motor and the heat dissipation efficiency of the motor. At the same time, the running stability of the motor is better. When driving the drum, it has better rotational inertia, reduces the heat generated by the motor, and keeps the motor running in a high efficiency range for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a structural diagram of the motor.

[0011] Figure 2 It is a schematic diagram of the cross-sectional structure of the motor.

[0012] Figure 3 yes Figure 2 Schematic diagram of the enlarged structure.

[0013] In the figure: 1. stator end, 2. rotor end, 3. hollow frame, 4. fixed end face, 5. motor fixing frame, 6. step body, 7. output shaft, 8. heat dissipation hole, 9. fixing slot, 10. permanent magnet. DETAILED DESCRIPTION

[0014] The present invention will be further described in detail below with reference to the accompanying drawings and through examples. The following examples are provided to explain the present invention, but the present invention is not limited to the following examples.

[0015] An outer rotor brushless motor driven by a washing machine drum, the motor comprising a stator end 1 and a rotor end 2, the stator end 1 having a coil group arranged on the circumferential surface of the stator, the rotor end 2 being sleeved on the outside of the coil group, a permanent magnet 10 being arranged on the inner side of the rotor end 2, an air gap being formed between the permanent magnet 10 and the coil group, a rear shell of the stator end 1 being formed with a hollow frame 3, the hollow frame 3 forming a fixed end face 4 at the rear end of the motor, the fixed end face 4 being in contact with and fixed to a motor fixed frame 5, the front end of the rotor end 2 being formed as an output end, which is formed with a step body 6 and an output shaft 7, the step body 6 being integrally formed on the rotor end 2, and the output shaft 7 being formed at the axis center of the step body 6.

[0016] The hollow frame 3 is integrally formed on the shell structure of the stator end 1 , and is formed with a plurality of mounting holes open to the inner space of the motor. Fixing members are installed in the mounting holes to fix the hollow frame 3 to the motor fixing frame 5 .

[0017] The mounting holes are formed in plurality at the corners of the housing of the stator end 1 and are arranged circumferentially, and the supporting entity structure between the mounting holes forms the supporting part of the hollow frame 3 .

[0018] The rotor end 2 is formed with a heat dissipation hole 8 , which is located on the outer diameter of the rotor end 2 and penetrates the shell portion of the rotor end 2 . The air gap between the coil assembly and the permanent magnet 10 is open to the heat dissipation hole 8 .

[0019] A fixing groove 9 is formed on the inner side of the shell of the rotor end 2. The fixing groove 9 is a wedge-shaped structure with a small inner distance and a large outer distance. The side edges of the permanent magnet 10 are correspondingly formed into opposite oblique edge structures and are tightly fixed in the fixing groove 9.

[0020] It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary rather than restrictive. The scope of the present invention is defined by the claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim involved.

[0021] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. An outer rotor brushless motor for driving a washing machine drum, characterized in that: The motor comprises a stator end (1) and a rotor end (2). The stator end (1) is provided with a coil group, which is arranged on the circumferential surface of the stator. The rotor end (2) is sleeved on the outside of the coil group. A permanent magnet (10) is arranged on the inner side of the rotor end (2). An air gap is formed between the permanent magnet (10) and the coil group. The rear shell of the stator end (1) is formed with a hollow frame (3). The hollow frame (3) forms a fixed end face (4) at the rear end of the motor. The fixed end face (4) contacts and is fixed to a motor fixed frame (5). The front end of the rotor end (2) is formed as an output end, which is formed with a step body (6) and an output shaft (7). The step body (6) is integrally formed on the rotor end (2). The output shaft (7) is formed at the axis of the step body (6).

2. The outer rotor brushless motor for driving the drum of a washing machine according to claim 1, characterized in that: The hollow frame (3) is integrally formed on the housing structure of the stator end (1), and the hollow frame (3) is formed with a plurality of mounting holes open to the internal space of the motor, and fixing parts are installed in the mounting holes to fix the hollow frame (3) and the motor fixing frame (5) in connection.

3. The outer rotor brushless motor for driving the drum of a washing machine according to claim 2, characterized in that: A plurality of mounting holes are formed at the corners of the housing of the stator end (1) and are arranged circumferentially, and the supporting entity structure between the mounting holes forms the supporting part of the hollow frame (3).

4. The outer rotor brushless motor for driving the drum of a washing machine according to claim 1, characterized in that: A heat dissipation hole (8) is formed on the rotor end (2), the heat dissipation hole (8) is located on the outer diameter of the rotor end (2) and penetrates the shell part of the rotor end (2), and the air gap between the coil group and the permanent magnet (10) is open to the heat dissipation hole (8).

5. The outer rotor brushless motor for driving the drum of a washing machine according to claim 1, characterized in that: A fixing groove (9) is formed on the inner side of the shell of the rotor end (2), and the fixing groove (9) is a wedge-shaped structure with a small inner distance and a large outer distance. The side edges of the permanent magnet (10) are correspondingly formed into opposite oblique edge structures and are tightly fixed in the fixing groove (9).

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