Dustproof totally-closed outer rotor structure

Abstract

The utility model discloses a dustproof totally-enclosed outer rotor structure, which comprises an outer rotor structure, a first-stage sealing ring, a connecting ring, a connecting sealing structure, an inner sleeve ring and a second-stage sealing ring, a permanent magnet is arranged on the inner surface of the outer rotor structure, the first-stage sealing ring is arranged at the center of the inner surface of a first port, a motor shell is arranged on the right side of the connecting ring, and the second-stage sealing ring is arranged on the right side of the connecting ring. The connecting sealing structure is arranged at the joint of the outer rotor structure and the connecting ring, the inner sleeve ring is arranged on the left end face of the motor shell, and the secondary sealing ring is arranged at the center of the inner surface of the second port. According to the dustproof totally-closed outer rotor structure, the outer rotor structure and the motor shell adopt a double-sealing structure design, so that dust, particles, moisture, liquid and the like can be effectively prevented from entering the motor, the working efficiency and the safety of the motor are improved, the service life of the motor is prolonged, and the reliability of the motor is improved; and the outer rotor structure and the motor shell are connected together through the thread structure, so that a complete sealing structure is formed.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a dustproof fully enclosed outer rotor structure. Background Art

[0002] At present, external rotor motors are widely used in household ventilators, instruments, range hoods, shoe polishers, etc. Its advantages are large moment of inertia, good heat dissipation, saving copper wire, and load parts such as fan blades can be directly embedded in the rotor, so it has a good market prospect.

[0003] For example, the patent document with application number 202122927234.9 discloses an outer rotor structure of an outer rotor brushless motor, including an outer shell, a recessed portion is provided on the bottom surface of the outer shell, a raised portion is provided on the inner wall of the upper part of the recessed portion, and an axial hole is provided on the bottom surface of the raised portion. The utility model adopts a flanging and stretching shell structure for the brushless motor, and the shaft core is directly pressed into the iron shell, so that the concentricity of the rotor is better, which effectively reduces the vibration of the finished motor; reduces the steps of pressing the copper sleeve, reduces the process, and improves production efficiency; at the same time, such an improvement can also reduce the production cost of the outer rotor.

[0004] A similar outer rotor structure will generate high temperature and vibration during the operation of the main shaft. When there is a lot of dust, pollutants or other particulate matter in the environment where the motor is located, a gap will occur between the motor and the external equipment, allowing lubricating oil or other external substances to penetrate through the gap, affecting the equipment parts under long-term operation.

[0005] Therefore, in view of this, the shortcomings of the existing structure are studied and improved, and a dust-proof fully enclosed outer rotor structure is proposed. Utility Model Content

[0006] The purpose of the utility model is to provide a dust-proof fully enclosed outer rotor structure. During the operation of the main shaft, high temperature, vibration, etc. will be generated. When there is a large amount of dust, pollutants or other particulate matter in the environment where the motor is located, a gap will be caused between the motor and the external equipment, allowing lubricating oil or other external substances to penetrate through the gap, causing the equipment parts to be affected during long-term operation.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a dustproof fully enclosed outer rotor structure, comprising an outer rotor structure, a primary sealing ring, a connecting ring, a connecting sealing structure, an inner sleeve ring and a secondary sealing ring, the inner surface of the outer rotor structure is provided with a permanent magnet, and the permanent magnet is provided in several groups, a first port is opened at the center of the left side of the outer rotor structure, the primary sealing ring is arranged at the center of the inner surface of the first port, the connecting ring is arranged at the right end surface of the outer rotor structure, and a motor housing is arranged on the right side of the connecting ring, an internal thread is opened on the inner surface of the connecting ring, the connecting sealing structure is arranged at the connection between the outer rotor structure and the connecting ring, the inner sleeve ring is arranged on the left end surface of the motor housing, and an external thread is opened on the inner surface of the inner sleeve ring, a second port is opened at the center of the right side of the motor housing, and the secondary sealing ring is arranged at the center of the inner surface of the second port.

[0008] Furthermore, the outer rotor structure and the motor housing form a complete motor structure, and the inner sleeve ring abuts against the connecting sealing structure through the inner cavity that passes through the connecting ring.

[0009] Furthermore, the aperture sizes of the first port and the second port are equal, and the positions of the first port and the second port correspond to each other at the same level.

[0010] Furthermore, the internal thread and the external thread are meshed with each other, and the primary sealing ring, the connecting sealing structure and the secondary sealing ring are all made of rubber structure.

[0011] Furthermore, the inner surface of the connecting ring and the outer surface of the connecting sealing structure abut against each other, and the right end surface of the connecting ring abuts against the left end surface of the motor housing.

[0012] Furthermore, the permanent magnet is in the shape of a cuboid structure, and a plurality of groups of the permanent magnets are arranged in a circular manner with equal spacing.

[0013] Compared with the prior art, the utility model has the following beneficial effects: the outer rotor structure and the motor housing adopt a double sealing structure design, which can effectively prevent dust, particles, moisture and liquid from entering the motor, improve the working efficiency and safety of the motor, thereby extending the service life and reliability of the motor, and the outer rotor structure and the motor housing are connected together through a threaded structure to form a complete sealing structure, the specific contents of which are as follows:

[0014] An outer rotor structure, a motor housing, a first port, a second port, a primary sealing ring and a secondary sealing ring are provided. The first port at the outer rotor structure and the second port at the motor housing form a double sealing protection layer through the primary sealing ring and the secondary sealing ring respectively, ensuring the tight sealing of the connection, which can effectively prevent external impurities such as dust and moisture from entering the bearing part of the main shaft body, reduce the probability of bearing wear and failure, and leak into the inside of the main shaft body through the connection, thereby avoiding contamination of the main shaft body or other adverse effects, and ensuring the stable rotation of the main shaft body.

[0015] A connecting ring, an internal thread, a connecting sealing structure, an inner sleeve ring and an external thread are provided. A group of threaded structures composed of the internal thread of the connecting ring and the external thread of the inner sleeve ring are used to connect the outer rotor structure to the motor housing to form a tight combination, and a connecting sealing ring is added at the threaded connection. This sealing structure can effectively fill the tiny gaps between the threads to form a complete sealing structure, and cooperate with the double sealing protective layer to achieve a fully enclosed function. The threaded connection can provide better connection strength and stability, ensure that there are no holes or gaps between the outer rotor structure and the motor housing, prevent liquids, gases or solid particles from entering the motor through the connection, and achieve a more rigorous fully enclosed effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of a three-dimensional explosion structure of a dust-proof fully enclosed outer rotor structure of the utility model;

[0017] Figure 2 This is a three-dimensional structural schematic diagram of a dust-proof fully enclosed outer rotor structure of the utility model;

[0018] Figure 3 This is a three-dimensional structural schematic diagram of a dust-proof fully enclosed outer rotor structure of the utility model;

[0019] Figure 4 The utility model is a dust-proof fully enclosed outer rotor structure Figure 1 Schematic diagram of the local enlarged structure at A in the figure.

[0020] In the figure: 1. outer rotor structure; 2. motor housing; 3. permanent magnet; 4. first port; 5. primary sealing ring; 6. connecting ring; 7. internal thread; 8. connecting sealing structure; 9. inner sleeve ring; 10. external thread; 11. second port; 12. secondary sealing ring. DETAILED DESCRIPTION

[0021] The following is a further detailed description of the implementation of the present utility model in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present utility model, but cannot be used to limit the scope of the present utility model.

[0022] like Figures 1 to 4As shown, a dustproof fully enclosed outer rotor structure comprises an outer rotor structure 1, a primary sealing ring 5, a connecting ring 6, a connecting sealing structure 8, an inner sleeve ring 9 and a secondary sealing ring 12. A permanent magnet 3 is arranged on the inner surface of the outer rotor structure 1. The permanent magnet 3 is arranged in a plurality of groups. The permanent magnet 3 is in the shape of a rectangular parallelepiped structure. The positions of the plurality of groups of permanent magnets 3 are arranged in a circular equidistant manner. A magnetic field is generated by the permanent magnet 3 inside the outer rotor to realize the motor driving function. A first port 4 is opened at the center of the left side of the outer rotor structure 1. The first port 4 is used for the main shaft to pass through. The primary sealing ring 5 is arranged at the center of the inner surface of the first port 4 to provide primary sealing protection. The first port 4 is closed by the primary sealing ring 5. The abutment with the main shaft, thereby protecting the inside of the motor from external pollutants, and the motor housing 2 is arranged on the right side of the connecting ring 6, the outer rotor structure 1 and the motor housing 2 form a complete motor sealing structure, and a second port 11 is opened at the center of the right side of the motor housing 2, and the second port 11 and the first port 4 are for the main shaft to pass through and rotate at the same time, and the secondary sealing ring 12 is arranged at the center of the inner surface of the second port 11, the aperture size of the first port 4 and the second port 11 is equal, and the positions of the first port 4 and the second port 11 are at the same level and correspond to each other, and the abutment between the second port 11 and the main shaft is closed by the secondary sealing ring 12, and the primary sealing ring 5 and the secondary sealing ring 12 form a double sealing effect;

[0023] The connecting ring 6 is arranged on the right end face of the outer rotor structure 1, and the inner surface of the connecting ring 6 abuts against the outer surface of the connecting sealing structure 8 to provide connection support, thereby ensuring a stable connection between the outer rotor structure 1 and the motor housing 2. An internal thread 7 is provided on the inner surface of the connecting ring 6, and the internal thread 7 provides a meshing function. An inner sleeve ring 9 is arranged on the left end face of the motor housing 2, and an external thread 10 is provided on the inner surface of the inner sleeve ring 9. The inner sleeve ring 9 meshes with the internal thread 7 of the connecting ring 6 through the external thread 10 to form a tight connection, thereby ensuring a stable connection between the motor housing 2 and the outer rotor structure 1. The internal thread 7 meshes with the external thread 10, and the right end face of the connecting ring 6 abuts against the left end face of the motor housing 2, thereby ensuring a stable connection between the motor housing 2 and the outer rotor structure 1. 8 is arranged at the connection between the outer rotor structure 1 and the connecting ring 6. The connecting sealing structure 8 is used to seal the connection part to prevent liquid or gas leakage and ensure the sealing effect of the connection. The inner ring 9 abuts against the connecting sealing structure 8 through the inner cavity that penetrates the connecting ring 6. After the inner ring 9 engages with the internal thread 7 of the connecting ring 6 through the external thread 10, it abuts against the connecting sealing structure 8, thereby effectively filling the small gap between the threads and sealing the connection. The material of the primary sealing ring 5, the connecting sealing structure 8 and the secondary sealing ring 12 are all rubber structures. The rubber structure of the primary sealing ring 5, the connecting sealing structure 8 and the secondary sealing ring 12 allows them to fill the gap, increase friction and achieve sealing.

[0024] In summary, if Figures 1 to 4As shown, the dustproof fully enclosed outer rotor structure generates a magnetic field through the permanent magnet 3 inside the outer rotor structure 1, which can interact with the coil inside the motor stator, thereby generating a rotational force to drive the motor to work, and the first-level sealing ring 5 is used to seal the connection between the first port 4 and one end of the main shaft, and the second-level sealing ring 12 is used to seal the connection between the second port 11 and the other end of the main shaft, thereby protecting from external pollutants. The first-level sealing ring 5 and the second-level sealing ring 12 form a double sealing effect, and the outer rotor structure 1 and the motor housing 2 form a complete motor sealing structure. The connecting ring 6 is meshed with the external thread 10 of the inner sleeve ring 9 through the internal thread 7, so that the outer rotor structure 1 and the motor housing 2 are firmly connected, and the inner sleeve ring 9 will abut against the connecting sealing structure 8, thereby effectively filling the small gap between the threads and sealing the connection.

Claims

1. A dustproof fully enclosed outer rotor structure, comprising an outer rotor structure (1), a primary sealing ring (5), a connecting ring (6), a connecting sealing structure (8), an inner sleeve ring (9) and a secondary sealing ring (12), characterized in that: The inner surface of the outer rotor structure (1) is provided with a permanent magnet (3), and the permanent magnet (3) is provided in a plurality of groups. A first port (4) is provided at the center of the left side of the outer rotor structure (1), and the primary sealing ring (5) is provided at the center of the inner surface of the first port (4). The connecting ring (6) is provided at the right end surface of the outer rotor structure (1), and a motor housing (2) is provided on the right side of the connecting ring (6). An internal thread (7) is provided on the inner surface of the connecting ring (6). The connecting sealing structure (8) is provided at the connection between the outer rotor structure (1) and the connecting ring (6). The inner sleeve ring (9) is provided at the left end surface of the motor housing (2), and an external thread (10) is provided on the inner surface of the inner sleeve ring (9). A second port (11) is provided at the center of the right side of the motor housing (2), and the secondary sealing ring (12) is provided at the center of the inner surface of the second port (11).

2. A dustproof fully enclosed outer rotor structure according to claim 1, characterized in that: The outer rotor structure (1) and the motor housing (2) form a complete motor sealing structure, and the inner sleeve ring (9) abuts against the connecting sealing structure (8) through the inner cavity that passes through the connecting ring (6).

3. The dustproof fully enclosed outer rotor structure according to claim 1, characterized in that: The apertures of the first port (4) and the second port (11) are equal in size, and the positions of the first port (4) and the second port (11) are at the same level and correspond to each other.

4. The dustproof fully enclosed outer rotor structure according to claim 1, characterized in that: The internal thread (7) and the external thread (10) are meshed with each other, and the primary sealing ring (5), the connecting sealing structure (8) and the secondary sealing ring (12) are all made of rubber structure.

5. The dustproof fully enclosed outer rotor structure according to claim 2, characterized in that: The inner surface of the connecting ring (6) abuts against the outer surface of the connecting sealing structure (8), and the right end surface of the connecting ring (6) abuts against the left end surface of the motor housing (2).

6. The dustproof fully enclosed outer rotor structure according to claim 1, characterized in that: The permanent magnets (3) are in the shape of a rectangular parallelepiped structure, and a plurality of groups of the permanent magnets (3) are arranged in a circular manner with equal spacing.

Images