Radiating brushless direct current motor shell

Abstract

The utility model belongs to the technical field of motors, and particularly relates to a heat-dissipation brushless direct-current motor shell, which comprises a shell and a rear cover, the front end of the shell is provided with a vent hole for airflow to flow out, a stator, a rotor and a driving shaft are mounted in the shell, one end of the driving shaft, which is positioned in the shell, is fixedly connected with fan blades, and the rear cover is fixedly connected with the stator. A plurality of ventilation openings are formed in the surface of the rear cover, and a flow guide assembly is installed on the surface of the driving shaft; according to the utility model, the fan blades are driven to rotate through the driving shaft, so that external airflow enters the interior of the shell from the ventilation opening to horizontally flow to dissipate heat of the stator, and the airflow enters the interior of the cavity from the air inlet to flow and vertically flows from the air outlet holes to dissipate heat of the internal area of the stator; and the heat dissipation effect on the stator is comprehensively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a heat-dissipating brushless DC motor housing. Background Art

[0002] The permanent magnet brushless DC motor is a common control type motor, which is characterized by low speed and high torque. When the permanent magnet brushless DC motor is used, it is mainly assisted by the internal permanent magnet mechanism. The permanent magnet is a thermal element. If the temperature is too high, the magnetic steel will be demagnetized, which will reduce the motor performance and affect the life of the brush motor.

[0003] In the prior art, permanent magnet brushless DC motors often rely on their own shells to dissipate heat naturally in order to solve the heat dissipation problem. However, in some places where the external environment is relatively hot, the natural heat dissipation of the permanent magnet brushless DC motor body shell alone cannot achieve good heat dissipation performance, resulting in a reduced service life of the motor and extreme inconvenience in use.

[0004] The existing Chinese patent with announcement number CN216599237U discloses a high-efficiency heat dissipation device for a brushless DC motor stator, including a brushless DC motor housing fixedly installed on the top of the base, and a heat exchange tube installed on the outer surface of the brushless DC motor housing, a protective box fixedly installed on the top of the brushless DC motor housing, and a heat exchange seat installed inside the protective box, a heat sink installed inside the heat exchange seat, a motor stator fixedly installed inside the base, and two bearings installed inside the motor stator, a motor rotor penetrated inside the bearing, and a fan blade is installed on the side of the motor rotor away from the motor stator.

[0005] With respect to the above-mentioned and existing related technologies, the inventors believe that the following defects often exist: the device drives the fan to dissipate heat to the stator through the rotor, but when the airflow flows to the stator, it is blocked by the stator itself, and the airflow has a weaker heat dissipation effect on the stator area farther from the fan, which needs to be improved; therefore, a heat-dissipating brushless DC motor housing is proposed to address the above-mentioned problems. Utility Model Content

[0006] In order to make up for the deficiencies of the prior art and solve the above-mentioned technical problems, the utility model provides a heat dissipating brushless DC motor housing.

[0007] The utility model adopts the following technical scheme to solve the technical problem: the utility model discloses a heat-dissipating brushless DC motor housing, comprising a housing and a back cover, a vent hole is provided at the front end of the housing to allow airflow to flow out, a stator, a rotor and a drive shaft are installed inside the housing, a fan blade is fixedly connected to one end of the drive shaft located inside the housing, a plurality of vents are provided on the surface of the back cover, a flow guide component is installed on the surface of the drive shaft, the flow guide component comprises a cavity, a plurality of groups of air outlets and an air inlet, the cavity is provided inside the drive shaft, the air outlets are equidistantly provided on the surface of the drive shaft, and the air inlet is provided on the surface of the drive shaft, when the brushless DC motor is running, the drive shaft drives the fan blade to rotate, so that the external airflow enters the housing from the vent to flow horizontally to dissipate the heat of the stator, the airflow enters the cavity from the air inlet to flow, and flows vertically from the air outlet, so as to dissipate the heat of the internal area of ​​the stator, and compared with the prior art, the heat dissipation effect of the stator is comprehensively improved.

[0008] Preferably, each group of air outlet holes is arranged in a ring shape with four of them.

[0009] Preferably, the guide assembly further includes a guide plate, which is fixedly mounted on the surface of the drive shaft. When the airflow flows, the airflow is guided by the guide plate so that the airflow can flow into the cavity from the air inlet.

[0010] Preferably, the guide plate is configured to be trumpet-shaped.

[0011] Preferably, a dustproof net is fixedly connected to the interior of the vent, and dust in the airflow passing through the vent is filtered through the dustproof net.

[0012] Preferably, a plurality of heat dissipation fins are fixedly mounted on the outer wall of the shell.

[0013] Preferably, a cleaning assembly is installed on the surface of the rear cover, and the cleaning assembly includes a rotating shaft, which is rotatably installed at the center of the rear cover, and one end of the rotating shaft is in contact with the driving shaft.

[0014] Preferably, one end of the rotating shaft is fixedly connected to a plurality of connecting columns, and the other end of the rotating shaft is fixedly connected to a brush plate.

[0015] Preferably, the cleaning assembly also includes a plurality of connecting grooves, which are opened at one end of the drive shaft. When the motor is assembled, the connecting column is inserted into the connecting groove, so that the drive shaft drives the rotating shaft to rotate, so that the brush plate can clean the dust net and remove dust attached to the surface. When the rear cover is opened, the connecting column automatically withdraws from the connecting groove, cancels the connection between the drive shaft and the rotating shaft, and facilitates the disassembly and assembly of the motor.

[0016] Preferably, a rain shield is fixedly connected to the surface of the rear cover to shield the vents from rain.

[0017] The utility model is beneficial in that:

[0018] 1. The utility model drives the fan blades to rotate through the driving shaft, so that the external airflow enters the shell through the vent and flows horizontally to dissipate the stator. The airflow enters the cavity from the air inlet and flows vertically from the air outlet, which can dissipate the heat of the internal area of ​​the stator. Compared with the existing technology, the heat dissipation effect of the stator is comprehensively improved.

[0019] 2. The utility model inserts the connecting column into the connecting groove, so that the driving shaft drives the rotating shaft to rotate, so that the brush plate can clean the dustproof net and remove the dust attached to the surface. When the rear cover is opened, the connecting column automatically withdraws from the connecting groove, cancels the connection between the driving shaft and the rotating shaft, and facilitates the disassembly and assembly of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0022] Figure 2 This is a cross-sectional view of the housing of the utility model;

[0023] Figure 3 This is a cross-sectional view of the drive shaft of the utility model;

[0024] Figure 4 This is a schematic diagram of the structure of the cleaning component of the utility model;

[0025] Figure 5 For this utility model Figure 4 Side view of.

[0026] In the figure: 1. shell; 2. back cover; 3. drive shaft; 4. fan blades; 5. guide assembly; 51. cavity; 52. air outlet; 53. air inlet; 54. guide plate; 6. vent; 7. dust screen; 8. cleaning assembly; 81. rotating shaft; 82. connecting column; 83. connecting groove; 84. brush plate; 9. cooling fins; 10. rain cover. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] Embodiment 1

[0029] See also Figure 1-3 As shown, a heat-dissipating brushless DC motor housing comprises a shell and a back cover, a ventilation hole is provided at the front end of the shell to allow air to flow out, a stator, a rotor and a driving shaft are installed inside the shell, a fan blade is fixedly connected to one end of the driving shaft located inside the shell, a plurality of ventilation holes are provided on the surface of the back cover, a flow guide component is installed on the surface of the driving shaft, the flow guide component comprises a cavity, a plurality of groups of air outlet holes and an air inlet, the cavity is provided inside the driving shaft, the air outlet holes are equidistantly provided on the surface of the driving shaft, and the air inlet is provided on the surface of the driving shaft. When the brushless DC motor is running, the driving shaft drives the fan blades to rotate, so that the external airflow enters the interior of the shell from the ventilation hole and flows horizontally to dissipate the heat of the stator. When the airflow flows, the airflow is guided by the guide plate, so that the airflow can flow into the cavity from the air inlet and flow vertically from the air outlet, so as to dissipate the heat of the internal area of ​​the stator. Compared with the prior art, the heat dissipation effect of the stator is comprehensively improved.

[0030] Each group of air outlet holes is arranged in a ring shape with four holes.

[0031] The guide assembly also includes a guide plate, which is fixedly mounted on the surface of the drive shaft. When the airflow flows, the guide plate guides the airflow so that the airflow can flow into the cavity from the air inlet.

[0032] The guide plate is configured to be trumpet-shaped.

[0033] A dustproof net is fixedly connected to the inside of the vent, and dust in the airflow passing through the vent is filtered through the dustproof net.

[0034] A plurality of heat dissipation fins are fixedly mounted on the outer wall of the shell.

[0035] Embodiment 2

[0036] For comparison with Example 1, please refer to Figure 4-5 As shown, the utility model provides another embodiment, a cleaning assembly is installed on the surface of the back cover, and the cleaning assembly includes a rotating shaft, which is rotatably installed at the center of the back cover, and one end of the rotating shaft is in contact with the driving shaft.

[0037] One end of the rotating shaft is fixedly connected with a plurality of connecting columns, and the other end of the rotating shaft is fixedly connected with a brush plate.

[0038] The cleaning component also includes a plurality of connecting grooves, which are opened at one end of the drive shaft. When the motor is assembled, the connecting column is inserted into the connecting groove, so that the drive shaft drives the rotating shaft to rotate, so that the brush plate can clean the dust net and remove the dust attached to the surface. When the rear cover is opened, the connecting column automatically withdraws from the connecting groove, canceling the connection between the drive shaft and the rotating shaft, making it convenient to disassemble and assemble the motor.

[0039] Through the personnel in this field, all the electrical components in this case are connected to their corresponding power supplies through wires, and a suitable controller should be selected according to the actual situation to meet the control requirements. The specific connection and control sequence should refer to the following working principle, and the electrical connection between the electrical components is completed in the order of working in sequence. The detailed connection means are well-known technologies in this field. The following mainly introduces the working principle and process, and does not explain the electrical control.

[0040] The parts not involved in the device are the same as those in the prior art or can be implemented by using the prior art.

[0041] Working principle: when the brushless DC motor is running, the drive shaft drives the fan blades to rotate, so that the external airflow enters the shell from the vent and flows horizontally to dissipate the heat of the stator. The airflow enters the cavity from the air inlet and flows vertically from the air outlet, which can dissipate the heat of the internal area of ​​the stator. Compared with the existing technology, the heat dissipation effect of the stator is comprehensively improved.

[0042] The dust in the airflow passing through the vent is filtered through the dustproof net. When the motor is assembled, the connecting column is inserted into the connecting groove, so that the driving shaft drives the rotating shaft to rotate, so that the brush plate can clean the dustproof net and remove the dust attached to the surface. When the rear cover is opened, the connecting column automatically withdraws from the connecting groove, cancels the connection between the driving shaft and the rotating shaft, and facilitates the disassembly and assembly of the motor.

[0043] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0044] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A heat dissipating brushless DC motor housing, comprising a housing (1) and a rear cover (2), wherein a stator, a rotor and a drive shaft (3) are installed inside the housing (1), characterized in that: The drive shaft (3) is located at one end inside the shell (1) and is fixedly connected to a fan blade (4); a plurality of ventilation holes (6) are provided on the surface of the rear cover (2); a flow guide component (5) is installed on the surface of the drive shaft (3); the flow guide component (5) comprises a cavity (51), a plurality of groups of air outlet holes (52) and an air inlet (53); the cavity (51) is provided inside the drive shaft (3); the air outlet holes (52) are provided at equal distances on the surface of the drive shaft (3); and the air inlet (53) is provided on the surface of the drive shaft (3).

2. The heat dissipating brushless DC motor housing according to claim 1, characterized in that: Each group of air outlet holes (52) has four holes arranged in a ring shape.

3. The heat dissipating brushless DC motor housing according to claim 1, characterized in that: The flow guide assembly (5) further comprises a flow guide plate (54), wherein the flow guide plate (54) is fixedly mounted on the surface of the drive shaft (3).

4. The heat dissipating brushless DC motor housing according to claim 3, characterized in that: The guide plate (54) is configured to be trumpet-shaped.

5. The heat dissipating brushless DC motor housing according to claim 1, characterized in that: A dustproof net (7) is fixedly connected to the interior of the ventilation opening (6).

6. The heat dissipating brushless DC motor housing according to claim 1, characterized in that: A cleaning assembly (8) is installed on the surface of the rear cover (2), and the cleaning assembly (8) comprises a rotating shaft (81). The rotating shaft (81) is rotatably installed at the center of the rear cover (2), and one end of the rotating shaft (81) is in contact with the driving shaft (3).

7. The heat dissipating brushless DC motor housing according to claim 6, characterized in that: One end of the rotating shaft (81) is fixedly connected to a plurality of connecting columns (82), and the other end of the rotating shaft (81) is fixedly connected to a brush plate (84).

8. The heat dissipating brushless DC motor housing according to claim 6, characterized in that: The cleaning assembly (8) further comprises a plurality of connecting grooves (83), wherein the connecting grooves (83) are formed at one end of the driving shaft (3).

9. The heat dissipating brushless DC motor housing according to claim 1, characterized in that: A plurality of heat dissipation fins (9) are fixedly mounted on the outer wall of the housing (1).

10. The heat dissipating brushless DC motor housing according to claim 1, characterized in that: A rain shield (10) is fixedly connected to the surface of the rear cover (2).

Images