External rotor motor

Abstract

The utility model discloses an external rotor motor, which belongs to the technical field of motors, and is characterized in that the external rotor motor comprises a shell, a stator module and a rotating shaft, two ends of the shell are respectively provided with a front end cover and a rear end cover, the front end cover and the rear end cover are respectively connected with two ends of the rotating shaft, and the stator module is arranged in the shell. A plurality of first fan blades and a plurality of second fan blades are arranged on the front end cover and the rear end cover respectively, an air inlet is formed between every two adjacent first fan blades, an air outlet is formed between every two adjacent second fan blades, and the air inlets are communicated with the air outlets. Therefore, the heat accumulated in the motor is dissipated, and the motor can be prevented from being damaged due to the internal temperature.

Description

Technical Field

[0001] The utility model belongs to the technical field of motors, and in particular relates to an outer rotor motor. Background Art

[0002] A motor is a device that converts electrical energy into mechanical energy. It uses an energized coil to generate a rotating magnetic field and acts on the rotor to form a magneto-electromotive force to generate a rotating torque.

[0003] Traditional motors usually do not have a heat dissipation structure. During the operation of the motor, heat is generated due to the current passing through the coil, and the mechanical movement inside the motor also generates frictional heat. If this heat cannot be dissipated in time, it will accumulate inside the motor. Especially when the motor works continuously for a long time, the internal temperature will rise rapidly, which can easily cause damage to the motor and make the motor unable to be used normally, so it is urgent to correct it. Utility Model Content

[0004] The purpose of the present invention is to solve the above problems in the prior art and to propose an outer rotor motor. The technical problem to be solved by the present invention is: how to dissipate the heat accumulated inside the motor.

[0005] The above technical objectives of the present invention can be achieved through the following technical solutions: an outer rotor motor, comprising a shell, a stator module and a rotating shaft, a front end cover and a rear end cover are respectively installed at both ends of the shell, the front end cover and the rear end cover are respectively connected to the two ends of the rotating shaft, the stator module is arranged in the shell, a plurality of fan blades 1 and a plurality of fan blades 2 are respectively provided on the front end cover and the rear end cover, an air inlet is formed between two adjacent fan blades 1, an air outlet is formed between two adjacent fan blades 2, and the air inlet and the air outlet are communicated through the shell.

[0006] In the above-mentioned external rotor motor, bearing 1 is coaxially arranged on the front end cover, and bearing 2 is coaxially arranged on the rear end cover. Both bearing 1 and bearing 2 are coaxially arranged with the rotating shaft, and the inner ring of bearing 1 and the inner ring of bearing 2 are respectively connected to the two ends of the rotating shaft.

[0007] In the above-mentioned outer rotor motor, a positioning protrusion 1 is provided on the front end cover, and the positioning protrusion 1 is inserted into one end of the outer shell, and the outer side wall of the positioning protrusion 1 is in contact with the inner side wall of the outer shell.

[0008] In the above-mentioned outer rotor motor, a second positioning protrusion is provided on the rear end cover, and the second positioning protrusion is inserted into the other end of the housing, and the outer side wall of the second positioning protrusion is in contact with the inner side wall of the housing.

[0009] In the above-mentioned outer rotor motor, a positioning step 1 is provided on the front end cover, and one end of the housing abuts against the step surface of the positioning step 1.

[0010] In the above-mentioned outer rotor motor, a second positioning step is provided on the front end cover, and the other end of the housing abuts against the step surface of the second positioning step.

[0011] In the above-mentioned outer rotor motor, the front end cover is provided with a first annular groove, and the rear end cover is provided with a second annular groove.

[0012] In the above-mentioned outer rotor motor, a plurality of reinforcing ribs 1 are evenly arranged along the circumferential direction in the annular groove 1, and a plurality of reinforcing ribs 2 are evenly arranged along the circumferential direction in the annular groove 2.

[0013] In summary, the beneficial effects of the present invention compared with the prior art are as follows:

[0014] By arranging a plurality of fan blades 1 and a plurality of fan blades 2 on the front cover and the rear cover respectively, an air inlet is formed between two adjacent fan blades 1, and an air outlet is formed between two adjacent fan blades 2. When the rotating shaft, the front cover, the rear cover and the outer shell rotate, wind enters the outer shell from the air inlet and is discharged from the air outlet through the outer shell, thereby taking away the heat in the outer shell, thereby dissipating the heat accumulated inside the motor, and preventing the motor from being damaged by the internal temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of an embodiment;

[0016] Figure 2 It is a structural schematic diagram of another angle of the embodiment;

[0017] Figure 3 A cross-sectional view of an embodiment.

[0018] Figure numerals: 1, outer shell; 2, stator module; 3, rotating shaft; 4, front cover; 5, rear cover; 6, fan blade 1; 7, fan blade 2; 8, air inlet; 9, air outlet; 10, bearing 1; 11, bearing 2; 12, positioning protrusion 1; 13, positioning protrusion 2; 14, positioning step 1; 15, positioning step 2; 16, annular groove 1; 17, annular groove 2; 18, reinforcing rib 1; 19, reinforcing rib 2. DETAILED DESCRIPTION

[0019] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0020] An outer rotor motor, such as Figures 1 to 3As shown, it includes a shell 1, a stator module 2 and a rotating shaft 3. A front end cover 4 and a rear end cover 5 are respectively installed at both ends of the shell 1. The front end cover 4 and the rear end cover 5 are respectively connected to the two ends of the rotating shaft 3. Specifically, a bearing 10 is coaxially arranged on the front end cover 4, and a bearing 2 11 is coaxially arranged on the rear end cover 5. The bearing 10 and the bearing 2 11 are both coaxially arranged with the rotating shaft 3, and the inner ring of the bearing 10 and the inner ring of the bearing 2 11 are respectively connected to the two ends of the rotating shaft 3.

[0021] The stator module 2 is arranged in the outer shell 1, and a plurality of fan blades 6 and a plurality of fan blades 2 7 are respectively provided on the front cover 4 and the rear cover 5. An air inlet 8 is formed between two adjacent fan blades 1 6, and an air outlet 9 is formed between two adjacent fan blades 2 7. The air inlet 8 and the air outlet 9 are connected through the outer shell 1.

[0022] That is, when the shaft 3, the front cover 4, the rear cover 5 and the housing 1 rotate, air enters the housing 1 from the air inlet 8 and is discharged from the air outlet 9 through the housing 1, thereby taking away the heat in the housing 1, thereby dissipating the heat accumulated inside the motor and preventing the motor from being damaged by the internal temperature.

[0023] A positioning protrusion 12 is provided on the front end cover 4, and the positioning protrusion 12 is inserted into one end of the shell 1. The outer wall of the positioning protrusion 12 is in contact with the inner wall of the shell 1. A positioning step 14 is provided on the front end cover 4, and one end of the shell 1 is in contact with the step surface of the positioning step 14. This can effectively ensure the relative stability of the front end cover 4 and the shell 1, improve the stability of the overall structure, and make the assembly of the two more convenient and quick.

[0024] A second positioning protrusion 13 is provided on the rear end cover 5, and the second positioning protrusion 13 is inserted into the other end of the shell 1. The outer wall of the second positioning protrusion 13 is in contact with the inner wall of the shell 1. A second positioning step 15 is provided on the front end cover 4, and the other end of the shell 1 is in contact with the step surface of the second positioning step 15. This can effectively ensure the relative stability of the rear end cover 5 and the shell 1, improve the stability of the overall structure, and make the assembly of the two more convenient and quick.

[0025] An annular groove 16 is provided on the front end cover 4, and a plurality of reinforcing ribs 18 are evenly arranged along the circumference of the annular groove 16 to increase the contact area between the front end cover 4 and the outside world, which not only improves the heat dissipation effect but also ensures the structural strength of the front end cover 4.

[0026] The rear end cover 5 is provided with an annular groove 2 17 , and a plurality of reinforcing ribs 2 19 are evenly arranged along the circumference of the annular groove 2 17 , thereby increasing the contact area between the rear end cover 5 and the outside world, which not only improves the heat dissipation effect but also ensures the structural strength of the rear end cover 5 .

[0027] The specific embodiments described in this article are merely examples of the spirit of the present invention; technicians in the technical field of the present invention may make various modifications or additions to the described specific embodiments or replace them in a similar manner, but they will not deviate from the spirit of the present invention or exceed the scope defined by the attached claims.

Claims

1. An outer rotor motor, characterized in that: The invention comprises a housing (1), a stator module (2) and a rotating shaft (3); a front end cover (4) and a rear end cover (5) are respectively installed at both ends of the housing (1); the front end cover (4) and the rear end cover (5) are respectively connected to the two ends of the rotating shaft (3); the stator module (2) is arranged in the housing (1); a plurality of fan blades (6) and a plurality of fan blades (7) are respectively arranged on the front end cover (4) and the rear end cover (5); an air inlet (8) is formed between two adjacent fan blades (6); an air outlet (9) is formed between two adjacent fan blades (7); and the air inlet (8) and the air outlet (9) are connected through the housing (1).

2. The outer rotor motor according to claim 1, characterized in that: A bearing 1 (10) is coaxially arranged on the front end cover (4), and a bearing 2 (11) is coaxially arranged on the rear end cover (5). The bearing 1 (10) and the bearing 2 (11) are both coaxially arranged with the rotating shaft (3), and the inner ring of the bearing 1 (10) and the inner ring of the bearing 2 (11) are respectively connected to the two ends of the rotating shaft (3).

3. The outer rotor motor according to claim 1, characterized in that: A positioning protrusion (12) is provided on the front end cover (4), and the positioning protrusion (12) is inserted into one end of the shell (1), and the outer side wall of the positioning protrusion (12) is in contact with the inner side wall of the shell (1).

4. The outer rotor motor according to claim 1, characterized in that: The rear end cover (5) is provided with a second positioning protrusion (13), which is inserted into the other end of the shell (1), and the outer side wall of the second positioning protrusion (13) is in contact with the inner side wall of the shell (1).

5. The outer rotor motor according to claim 1, characterized in that: A positioning step 1 (14) is provided on the front end cover (4), and one end of the housing (1) abuts against the step surface of the positioning step 1 (14).

6. The outer rotor motor according to claim 1, characterized in that: A second positioning step (15) is provided on the front end cover (4), and the other end of the housing (1) abuts against the step surface of the second positioning step (15).

7. The outer rotor motor according to claim 1, characterized in that: The front end cover (4) is provided with an annular groove 1 (16), and the rear end cover (5) is provided with an annular groove 2 (17).

8. The outer rotor motor according to claim 7, characterized in that: A plurality of reinforcing ribs (18) are evenly arranged along the circumference in the annular groove (16), and a plurality of reinforcing ribs (19) are evenly arranged along the circumference in the annular groove (17).

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