Low-temperature-rise brushless motor

Abstract

The utility model relates to the technical field of brushless motors, and particularly discloses a low temperature rise brushless motor, which comprises a motor body, the motor body comprises a shell, a front cover, a rear cover and a rotating shaft, the front cover is connected to the right side of the shell, the rear cover is connected to the left side of the shell, the rotating shaft is arranged in the shell, and the right end of the rotating shaft penetrates through the front cover. An air inlet mechanism is arranged on the right side of the front cover, air outlets are formed in the circumference of the left side of the rear cover in an array mode, and the right ends of the air outlets penetrate through the rear cover and communicate with an inner cavity of the shell. According to the brushless motor, heat of elements in the shell is dissipated and exhausted through the air outlet and the exhaust pipe, heat dissipation of the brushless motor is achieved, the temperature rising speed is reduced when the brushless motor is used, the air inlet mechanism has a certain isolation effect, and external impurities are not prone to entering the shell through a gap between the rotating shaft and the front cover.

Description

Technical Field

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

[0002] When the brushless motor is in use, the operation of various components, especially when working for a long time, will cause the temperature of the brushless motor itself to rise. If things go on like this for a long time, it will easily affect the normal operation of the brushless motor. In serious cases, it will easily cause the brushless motor to be damaged due to overheating, causing unnecessary economic losses. In addition, there will be a certain gap between the rotating shaft and the front cover of the brushless motor, and foreign impurities will enter the housing of the brushless motor through the gap, which will easily cause damage to the brushless motor. Utility Model Content

[0003] The purpose of the utility model is to provide a low-temperature rise brushless motor to solve the problems raised in the above background technology.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A low-temperature-rise brushless motor comprises a motor body, the motor body comprises a shell, a front cover, a rear cover and a rotating shaft, the front cover is connected to the right side of the shell, the rear cover is connected to the left side of the shell, the rotating shaft is arranged in the shell, and the right end of the rotating shaft passes through the front cover, and an air inlet mechanism is arranged on the right side of the front cover. When the brushless motor is used, the rotating shaft rotates, thereby driving the assembly ring and the fan blades to rotate, and guiding the air in the external environment into the air inlet, so that the air enters the shell, dissipates the heat of the components in the shell, and is discharged from the air outlet and the exhaust pipe, so as to realize the heat dissipation of the brushless motor and make the brushless motor The temperature rise rate of the machine when in use is reduced, so that the synchronous heat dissipation of the brushless motor is achieved by utilizing the rotation of the rotating shaft; and the blocking net arranged in the connecting slot has a certain blocking effect, so that impurities in the external environment are not easy to enter the constraint ring, so that it is not easy for the external impurities to enter the shell through the gap between the rotating shaft and the front cover. The left side of the rear cover is provided with an air outlet in a circular array, and the right end of the air outlet passes through the rear cover and is connected to the inner cavity of the shell. The left side of the rear cover is connected with an outer cover mechanism, so that impurities in the external environment are not easy to enter the shell through the air outlet without affecting the air outlet.

[0006] The air inlet mechanism includes an air inlet, a constraint ring, an assembly ring, fan blades, a circular plate and a connecting slot. The circular array of air inlets is opened on the right side of the front cover, and the left end of the air inlet passes through the front cover and is connected with the inner cavity of the shell. The constraint ring is arranged on the right side of the front cover, and the constraint ring is on the outside of the rotating shaft. The air inlet is connected to the inner cavity of the constraint ring. The assembly ring sleeve is connected to the outer wall of the rotating shaft, and a gap is left between the left side of the assembly ring and the front cover. The circular array of fan blades is connected to the outer wall of the assembly ring, and the assembly ring and the fan blades are both in the constraint ring. The circular plate is arranged on the right side of the assembly ring, and the outer wall of the circular plate is connected to the constraint ring. The right end of the rotating shaft passes through the circular plate. The circular array of connecting slots is opened on the right side of the circular plate, and the left end of the connecting slot passes through the circular plate. A gap is left between the circular plate, the assembly ring and the fan blades.

[0007] Preferably, a positioning plate is connected to the circumferential array of the outer wall of the restraint ring, and the positioning plate is in contact with the front cover. A positioning bolt is provided in the middle of the right side of the positioning plate, and the tail end of the positioning bolt passes through the positioning plate and is threadedly connected to the front cover, so as to facilitate disassembly and assembly between the restraint ring and the front cover, thereby facilitating the inspection and replacement of various components in the restraint ring.

[0008] Preferably, an arcuate sealing strip is connected to the outer wall of the restraint ring in a circumferential array, and both ends of the arcuate sealing strip are respectively connected to the positioning plate to cooperate with the positioning plate to enhance the sealing between the rear end of the restraint ring and the front cover.

[0009] Preferably, a reinforcement groove is opened in the circular array on the right side of the front cover, and a reinforcement strip is snap-connected in the reinforcement groove, and the right side of the reinforcement strip is connected to the arc-shaped sealing strip, so that the reinforcement strip is in the reinforcement groove, which can enhance the sealing between the front cover and the constraint ring, and the reinforcement strip is snap-fitted in the reinforcement groove, so the connection between the reinforcement strip and the reinforcement groove enhances the stability of the arc-shaped sealing strip, so that the arc-shaped sealing strip and the front cover have a connection effect, thereby enhancing the strength of the connection between the constraint ring and the front cover.

[0010] Preferably, a blocking net is provided in the connecting groove, and the blocking net is connected to the circular plate, which has a certain blocking effect, making it difficult for impurities in the external environment to enter the constraint ring, thereby making it difficult for impurities to be present in the constraint ring, and making it difficult for external impurities to enter the shell through the gap between the rotating shaft and the front cover.

[0011] Preferably, the outer cover mechanism includes a rear cover, an exhaust pipe and a one-way valve, the rear cover is connected to the middle part of the left side of the rear cover, the exhaust pipe is connected to the middle part of the left side of the rear cover, and the exhaust pipe is communicated with the inner cavity of the rear cover, the one-way valve is arranged on the exhaust pipe, and the air outlet is communicated with the inner cavity of the rear cover, so that impurities in the external environment are not easily entered into the shell through the air outlet without affecting the air outlet.

[0012] Compared with the prior art, the beneficial effect of the utility model is that when the utility model is in use, when the brushless motor is running, the rotating shaft drives the fan blades to rotate, and the outside air is guided to the inner cavity of the shell through the air inlet pipe, the components in the shell are cooled, and the heat is discharged from the air outlet and the exhaust pipe, so as to realize the heat dissipation of the brushless motor and reduce the temperature rise rate of the brushless motor when in use, thereby utilizing the rotation of the shaft to realize the synchronous heat dissipation of the brushless motor, and the air intake mechanism plays a certain isolation effect, so that external impurities are not easy to enter the shell through the gap between the shaft and the front cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The figure is a schematic diagram of the overall cross section of a low-temperature rise brushless motor.

[0014] Figure 2 This is a schematic diagram of the left side structure of a low-temperature rise brushless motor.

[0015] Figure 3 This is a schematic diagram of the internal structure of a restraint ring of a low-temperature rise brushless motor.

[0016] Figure 4 A schematic diagram of the fan blades of a low-temperature rise brushless motor.

[0017] Figure 5 The figure is a schematic diagram of the air outlet of a low-temperature-rise brushless motor.

[0018] Figure 6 A schematic diagram of the reinforcement bars of a low-temperature rise brushless motor.

[0019] In the figure: 1. Shell; 2. Front cover; 3. Rear cover; 4. Rotating shaft; 5. Air outlet; 6. Air inlet; 7. Constraint ring; 8. Assembly ring; 9. Fan blade; 10. Circular plate; 11. Connecting slot; 12. Positioning plate; 13. Positioning bolt; 14. Arc sealing strip; 15. Reinforcement slot; 16. Reinforcement strip; 17. Rear cover; 18. Exhaust pipe; 19. One-way valve; 20. Screen. DETAILED DESCRIPTION

[0020] Example 1

[0021] See also Figure 1-Figure 6As shown, a low-temperature-rise brushless motor includes a motor body, which includes a shell 1, a front cover 2, a rear cover 3 and a rotating shaft 4. The front cover 2 is connected to the right side of the shell 1, and the rear cover 3 is connected to the left side of the shell 1. The rotating shaft 4 is arranged in the shell 1, and the right end of the rotating shaft 4 passes through the front cover 2. An air inlet mechanism is arranged on the right side of the front cover 2. When the brushless motor is used, the rotating shaft 4 rotates, thereby driving the assembly ring 8 and the fan blades 9 to rotate, and guiding the air in the external environment into the air inlet 6, so that the air enters the shell 1, dissipates the heat of the components in the shell 1, and is discharged from the air outlet 5 and the exhaust pipe 18, so as to realize the heat dissipation of the brushless motor and make the brushless motor The temperature rise rate of the brushless motor is reduced when it is in use, so that the synchronous heat dissipation of the brushless motor is achieved by utilizing the rotation of the rotating shaft 4; and the blocking net 20 arranged in the communicating slot 11 has a certain blocking effect, so that impurities in the external environment are not easy to enter the restraining ring 7, so that it is not easy for the external impurities to enter the housing 1 through the gap between the rotating shaft 4 and the front cover 2. The air outlet 5 is provided in a circular array on the left side of the rear cover 3, and the right end of the air outlet 5 penetrates the rear cover 3 and is connected to the inner cavity of the housing 1. The left side of the rear cover 3 is connected with an outer cover mechanism, which does not affect the air outlet 5 while preventing impurities in the external environment from entering the housing 1 through the air outlet 5;

[0022] The air inlet mechanism includes an air inlet 6, a constraint ring 7, an assembly ring 8, fan blades 9, a circular plate 10 and a connecting slot 11. The air inlet 6 is arranged in a circular array on the right side of the front cover 2, and the left end of the air inlet 6 passes through the front cover 2 and is connected to the inner cavity of the shell 1. The constraint ring 7 is arranged on the right side of the front cover 2, and the constraint ring 7 is on the outside of the rotating shaft 4. The air inlet 6 is connected to the inner cavity of the constraint ring 7. The assembly ring 8 is sleeved and connected to the outer wall of the rotating shaft 4, and a gap is left between the left side of the assembly ring 8 and the front cover 2. The fan blades 9 are connected to the outer wall of the assembly ring 8 in a circular array, and the assembly ring 8 and the fan blades 9 are both in the constraint ring 7. The circular plate 10 is arranged on the right side of the assembly ring 8, and the outer wall of the circular plate 10 is connected to the constraint ring 7. The right end of the rotating shaft 4 passes through the circular plate 10. The connecting slot 11 is arranged in a circular array on the right side of the circular plate 10, and the left end of the connecting slot 11 passes through the circular plate 10. There is a gap between the circular plate 10 and the assembly ring 8 and the fan blades 9.

[0023] refer to Figure 1 , Figure 3 and Figure 6 As shown, a positioning plate 12 is connected to a circular array on the outer wall of the restraint ring 7, and the positioning plate 12 is fitted with the front cover 2. A positioning bolt 13 is provided in the middle of the right side of the positioning plate 12, and the tail end of the positioning bolt 13 passes through the positioning plate 12 and is threadedly connected to the front cover 2, so as to facilitate the disassembly and assembly between the restraint ring 7 and the front cover 2, thereby facilitating the inspection and replacement of various components in the restraint ring 7.

[0024] refer to Figure 1 , Figure 3 and Figure 6As shown, an arcuate sealing strip 14 is connected to the outer wall of the restraint ring 7 in a circumferential array, and both ends of the arcuate sealing strip 14 are respectively connected to the positioning plate 12 to cooperate with the positioning plate 12 to enhance the sealing between the rear end of the restraint ring 7 and the front cover 2.

[0025] refer to Figure 4 and Figure 6 As shown, a reinforcing groove 15 is opened in a circular array on the right side of the front cover 2, and a reinforcing strip 16 is snap-connected in the reinforcing groove 15, and the right side of the reinforcing strip 16 is connected to the arc-shaped sealing strip 14, so that the reinforcing strip 16 is in the reinforcing groove 15, which can enhance the sealing between the front cover 2 and the restraining ring 7, and the reinforcing strip 16 is snap-fitted in the reinforcing groove 15, so the connection between the reinforcing strip 16 and the reinforcing groove 15 enhances the stability of the arc-shaped sealing strip 14, so that the arc-shaped sealing strip 14 and the front cover 2 have a connection effect, thereby enhancing the strength of the connection between the restraining ring 7 and the front cover 2.

[0026] refer to Figure 1 As shown, a blocking net 20 is provided in the connecting slot 11, and the blocking net 20 is connected to the circular plate 10, which has a certain blocking effect, making it difficult for impurities in the external environment to enter the restraint ring 7, thereby making it difficult for impurities to be present in the restraint ring 7, and making it difficult for external impurities to enter the housing 1 through the gap between the rotating shaft 4 and the front cover 2.

[0027] refer to Figure 1-Figure 5 As shown, the outer cover mechanism includes a rear cover 17, an exhaust pipe 18 and a one-way valve 19. The rear cover 17 is connected to the middle part of the left side of the rear cover 3, the exhaust pipe 18 is connected to the middle part of the left side of the rear cover 17, and the exhaust pipe 18 is communicated with the inner cavity of the rear cover 17. The one-way valve 19 is arranged on the exhaust pipe 18, and the air outlet 5 is communicated with the inner cavity of the rear cover 17. While not affecting the air outlet 5, impurities in the external environment are not easily introduced into the shell 1 through the air outlet 5.

[0028] Working principle: When the brushless motor is used, the shaft 4 will rotate, thereby driving the assembly ring 8 and the fan blades 9 to rotate, and guiding the air in the external environment into the air inlet 6, so that the air enters the shell 1, dissipates the heat of the components in the shell 1, and is discharged from the air outlet 5 and the exhaust pipe 18, thereby realizing the heat dissipation of the brushless motor and reducing the temperature rise rate of the brushless motor during use, thereby utilizing the rotation of the shaft 4 to realize the synchronous heat dissipation of the brushless motor; and through the blocking net 20 set in the connecting slot 11, a certain blocking effect is achieved, so that impurities in the external environment are not easy to enter the constraint ring 7, so that external impurities are not easy to enter the shell 1 through the gap between the shaft 4 and the front cover 2.

[0029] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A low temperature rise brushless motor, comprising a motor body, characterized in that: The motor body comprises a shell (1), a front cover (2), a rear cover (3) and a rotating shaft (4); the front cover (2) is connected to the right side of the shell (1); the rear cover (3) is connected to the left side of the shell (1); the rotating shaft (4) is arranged in the shell (1); and the right end of the rotating shaft (4) passes through the front cover (2); an air inlet mechanism is arranged on the right side of the front cover (2); air outlets (5) are arranged in a circular array on the left side of the rear cover (3); and the right end of the air outlets (5) passes through the rear cover (3) and is communicated with the inner cavity of the shell (1); and an outer cover mechanism is connected to the left side of the rear cover (3); The air inlet mechanism comprises an air inlet (6), a restraining ring (7), an assembly ring (8), a fan blade (9), a circular plate (10) and a connecting slot (11); the air inlet (6) is arranged in a circular array on the right side of the front cover (2), and the left end of the air inlet (6) passes through the front cover (2) and is connected to the inner cavity of the shell (1); the restraining ring (7) is arranged on the right side of the front cover (2), and the restraining ring (7) is located outside the rotating shaft (4); the air inlet (6) is connected to the inner cavity of the restraining ring (7); the assembly ring (8) is sleeved and connected to the outer wall of the rotating shaft (4), and the left side of the assembly ring (8) is connected to the front cover (2). A gap is left between the fan blades (9) in a circumferential array connected to the outer wall of the assembly ring (8), and the assembly ring (8) and the fan blades (9) are both located in the constraint ring (7); the circular plate (10) is arranged on the right side of the assembly ring (8), and the outer wall of the circular plate (10) is connected to the constraint ring (7); the right end of the rotating shaft (4) passes through the circular plate (10); the circumferential array of the connecting slots (11) is opened on the right side of the circular plate (10), and the left end of the connecting slots (11) passes through the circular plate (10); and a gap is left between the circular plate (10) and the assembly ring (8) and the fan blades (9).

2. A low temperature rise brushless motor according to claim 1, characterized in that: The outer wall of the restraining ring (7) is connected to a positioning plate (12) in a circular array, and the positioning plate (12) is fitted with the front cover (2). A positioning bolt (13) is provided in the middle of the right side of the positioning plate (12), and the tail end of the positioning bolt (13) passes through the positioning plate (12) and is threadedly connected to the front cover (2).

3. A low temperature rise brushless motor according to claim 2, characterized in that: The outer wall of the restraining ring (7) is connected to an arc-shaped sealing strip (14) in a circumferential array, and both ends of the arc-shaped sealing strip (14) are respectively connected to the positioning plate (12).

4. A low temperature rise brushless motor according to claim 3, characterized in that: The front cover (2) is provided with a reinforcement slot (15) in a circumferential array on the right side thereof, a reinforcement strip (16) is snap-fitted into the reinforcement slot (15), and the right side of the reinforcement strip (16) is connected to the arc-shaped sealing strip (14).

5. The low temperature rise brushless motor according to claim 1, characterized in that: A blocking net (20) is provided in the communicating slot (11), and the blocking net (20) is connected to the circular plate (10).

6. The low temperature rise brushless motor according to claim 1, characterized in that: The outer cover mechanism comprises a rear cover (17), an exhaust pipe (18) and a one-way valve (19); the rear cover (17) is connected to the middle part of the left side of the rear cover (3); the exhaust pipe (18) is connected to the middle part of the left side of the rear cover (17); the exhaust pipe (18) is communicated with the inner cavity of the rear cover (17); the one-way valve (19) is arranged on the exhaust pipe (18); and the air outlet (5) is communicated with the inner cavity of the rear cover (17).

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