Low-loss brushless motor

Abstract

The utility model relates to a low-loss brushless motor which comprises a shell, one side of the shell is fixedly connected with a fan shell, one side of the fan shell far away from the shell is provided with a plurality of air outlet channels, a rotating shaft is erected in the shell, the rotating shaft is located at the central axis position in the shell, one end of the rotating shaft is rotatably connected with the shell through a first bearing, and the other end of the rotating shaft is connected with a second bearing. The rotating shaft is arranged in the shell and penetrates through the shell to extend into the fan shell, the end, extending into the fan shell, of the rotating shaft is fixedly connected with an exhaust fan, the end, away from the exhaust fan, of the rotating shaft is rotationally connected with the shell through a second bearing and extends out of the shell, air inlets are symmetrically formed in the positions, away from the exhaust fan, of the two sides of the shell, and detachable filter screens are arranged outside the air inlets. And an activated carbon filter screen is arranged between the filter screen and the outer surface of the shell. The motor is reasonable in structure, effectively reduces the temperature of the motor, prevents dust from entering the interior of the motor, and reduces the loss of the motor through the cooperative use of the exhaust fan, the double-layer filter screen and the heat dissipation fins.

Description

Technical Field

[0001] The utility model relates to the technical field of brushless motors, in particular to a low-loss brushless motor. Background Art

[0002] A brushless DC motor uses semiconductor switching devices to achieve electronic commutation, that is, electronic switching devices are used to replace traditional contact commutators and brushes, and has the advantages of high reliability, no commutation sparks, and low mechanical noise. Existing motors usually dissipate heat by opening heat dissipation channels on the housing. This heat dissipation method will cause air with dust and small particles from the outside to enter the motor during air circulation. The dust and small particles may adhere to the inner walls of the rotor and bearings, increasing the loss of the motor. Summary of the Utility Model

[0003] In order to overcome the deficiencies of the above-mentioned existing problems, the utility model provides a low-loss brushless motor.

[0004] The technical solution adopted by the utility model to solve its technical problems is: a low-loss brushless motor, including a housing, a fan housing is fixedly connected to one side of the housing, and a plurality of air outlet channels are opened on the side of the fan housing away from the housing. A rotating shaft is installed in the housing, and the rotating shaft is located at the central axis position in the housing. One end of the rotating shaft is rotatably connected to the housing through a first bearing and extends into the fan housing through the housing. The end of the rotating shaft extending into the fan housing is fixedly connected with an exhaust fan. The end of the rotating shaft away from the exhaust fan is rotatably connected to the housing through a second bearing and extends out of the housing. Air inlets are symmetrically opened on both sides of the housing away from the exhaust fan, and a detachable filter screen is arranged outside the air inlets. An activated carbon filter screen is arranged between the filter screen and the outer surface of the housing. Both the filter screen and the activated carbon filter screen are connected to the housing through bolts. During use, when the exhaust fan rotates to discharge the hot air in the motor to the outside, cold air enters the interior of the motor through the air inlets, and the combined action of the filter screen and the activated carbon filter screen reduces the attached particles, dust and other substances in the air entering the motor.

[0005] Preferably, a cavity for accommodating the activated carbon filter screen is arranged in the filter screen, and a sealing ring is arranged at the joint where the filter screen fits with the housing to prevent dust or small particles in the air from getting stuck at the joint.

[0006] Preferably, arc-shaped heat dissipation fins that fit the housing are arranged between the housing, the fan housing and the filter screen. By the combined use of the fan and the heat dissipation fins, the heat dissipation efficiency is further improved.

[0007] Preferably, the activated carbon filter screen is of an inner hexagonal honeycomb structure and has characteristics such as high adsorption capacity and small air resistance coefficient.

[0008] The beneficial effects of the present utility model are as follows: the hot air inside the motor can be quickly discharged through the exhaust fan. When discharging the hot air, through the combined action of the filter screen and the activated carbon filter screen, small particles and dust in the air are prevented from entering the interior of the motor and adhering to the inner walls of the rotor and the bearing, reducing the resistance of the rotor operation and the loss of the motor. In addition, the filter screen and the activated carbon filter screen are designed to be detachable. When the filtering effect of the filter screen decreases after long-term use, it is convenient to clean the filter screen and replace the internal activated carbon filter screen. Moreover, through the first-layer screening by the filter screen, a large amount of dust or small particles are prevented from being adsorbed by the activated carbon filter screen in a short time, improving the service life of the activated carbon filter screen. Heat dissipation fins are provided outside the housing to further reduce the heat of the motor and reduce the loss of the motor. Description of the Drawings

[0009] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0010] Figure 1 is the front view of the present utility model;

[0011] Figure 2 is the left view of the present utility model;

[0012] Figure 3 is Figure 2 the sectional view taken along the direction of B-B in

[0013] Figure 4 is Figure 1 the sectional view taken along the direction of A-A in

[0014] Figure 5 is the schematic diagram of the disassembly of the filter screen and the activated carbon filter screen;

[0015] In the figures, 1, housing; 2, rotating shaft; 3, fan housing; 4, first bearing; 5, exhaust fan; 6, second bearing; 7, air inlet; 8, air outlet channel; 9, filter screen; 10, activated carbon filter screen; 11, cavity; 12, heat dissipation fins; 13, sealing ring. Detailed Embodiments

[0016] All the features disclosed in this specification, or all the steps in any disclosed method or process, except for mutually exclusive features and / or steps, can be combined in any manner.

[0017] Any feature disclosed in this specification (including any additional claims, abstract, and drawings), unless specifically recited, can be replaced by other equivalent or similar-purpose alternative features. That is, unless specifically recited, each feature is only an example of a series of equivalent or similar features.

[0018] Such as Figure 1-5A low-loss brushless motor shown in the figure includes a housing 1. One side of the housing 1 is fixedly connected to a fan housing 3. A plurality of air outlet channels 8 are opened on the side of the fan housing 3 away from the housing 1. A rotating shaft 2 is installed in the housing 1. The rotating shaft 2 is located at the central axis position in the housing 1. One end of the rotating shaft 2 is rotatably connected to the housing 1 through a first bearing 4 and extends into the fan housing 3 through the housing 1. One end of the rotating shaft 2 extending into the fan housing 3 is fixedly connected to an exhaust fan 5. The end of the rotating shaft 2 away from the exhaust fan 5 is rotatably connected to the housing 1 through a second bearing 6 and extends out of the housing 1. Air inlets 7 are symmetrically opened on both sides of the housing 1 away from the exhaust fan. A detachable filter screen 9 is provided outside the air inlets 7. An activated carbon filter screen 10 is arranged between the filter screen 9 and the outer surface of the housing 1. Both the filter screen 9 and the activated carbon filter screen 10 are connected to the housing 1 by bolts. During use, when the exhaust fan 5 rotates to discharge the hot air in the motor outward, cold air enters the interior of the motor through the air inlets 7. Through the combined action of the filter screen 9 and the activated carbon filter screen 10, the particles, dust and other attachments carried in the air entering the motor are reduced.

[0019] A cavity 11 for accommodating the activated carbon filter screen 10 is provided inside the filter screen 9. A sealing ring 13 is provided at the joint where the filter screen 9 fits the housing 1 to prevent dust or small particles in the air from getting stuck at the joint.

[0020] Arc-shaped heat dissipation fins 12 that fit the housing 1 are arranged between the housing 1, the fan housing 3 and the filter screen 9. Through the combined use of the fan and the heat dissipation fins 12, the heat dissipation efficiency is further improved.

[0021] The activated carbon filter screen 10 is of an inner hexagonal honeycomb structure and has characteristics such as high adsorption capacity and small air resistance coefficient.

[0022] This design is ingenious. It can quickly discharge the hot air in the motor through the exhaust fan. When discharging the hot air, through the combined action of the filter screen and the activated carbon filter screen, it prevents small particles and dust in the air from entering the interior of the motor and adhering to the inner walls of the rotor and bearings, reduces the resistance of the rotor operation, and reduces the loss of the motor. In addition, the filter screen and the activated carbon filter screen are of a detachable design. When the filtering effect of the filter screen decreases after long-term use, it is convenient to clean the filter screen and replace the internal activated carbon filter screen. And through the first-layer screening by the filter screen, it prevents the activated carbon filter screen from adsorbing a large amount of dust or small particles in a short time, improves the service life of the activated carbon filter screen, and heat dissipation fins are provided outside the housing to further reduce the heat of the motor and reduce the loss of the motor.

[0023] The present invention is not limited to the foregoing specific embodiments. The present invention extends to any new feature or any new combination disclosed in this specification, as well as any new method or process step or any new combination disclosed.

Claims

1. A low-loss brushless motor, characterized in that: The invention comprises a shell (1), one side of the shell (1) is fixedly connected to a fan shell (3), a side of the fan shell (3) away from the shell (1) is provided with a plurality of air outlet channels (8), a rotating shaft (2) is arranged inside the shell (1), the rotating shaft (2) is located at the central axis position inside the shell (1), one end of the rotating shaft (2) is rotatably connected to the shell (1) through a first bearing (4), and passes through the shell (1) to extend into the fan shell (3), one end of the rotating shaft (2) extending into the fan shell (3) is fixedly connected to an exhaust fan (5), one end of the rotating shaft (2) away from the exhaust fan (5) is rotatably connected to the shell (1) through a second bearing (6) and extends out of the shell (1), and air inlets (7) are symmetrically arranged on both sides of the shell (1) away from the exhaust fan (5), a detachable filter screen (9) is arranged outside the air inlet (7), and an activated carbon filter screen (10) is arranged between the filter screen (9) and the outer surface of the shell (1).

2. A low-loss brushless motor according to claim 1, characterized in that: The filter screen (9) is provided with a cavity (11) capable of accommodating the activated carbon filter screen (10), and a sealing ring (13) is provided at the joint between the filter screen (9) and the housing (1).

3. A low-loss brushless motor according to claim 1, characterized in that: Arcuate heat dissipation fins (12) that fit with the housing (1) are provided between the fan housing (3) and the filter screen (9).

4. A low-loss brushless motor according to claim 1, characterized in that: The activated carbon filter (10) is a hexagonal honeycomb structure.

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