Inner rotor motor heat dissipation structure with motor controller

Abstract

The utility model discloses an inner rotor motor heat radiation structure with a motor controller, which comprises a motor body and a motor controller, the heat radiation structure is arranged between the motor controller and a rear end cover, the heat radiation structure comprises an air guide plate and an air guide cover, and the rear end cover comprises an end plate and a mounting ring extending out of the end plate. A plurality of first air guide holes are formed in the connecting plate in the circumferential direction, and the first air guide holes face the first radiating ribs; the top plate, the wind scooper and the end plate enclose a heat dissipation cavity, the wind deflector is nested in the rear end cover, the second air duct is communicated with the lower cavity, a communication hole is formed in the middle of the wind deflector to communicate the upper cavity and the lower cavity, and the fan is installed in the upper cavity or the lower cavity and connected with the rear shaft extension. The heat dissipation performance is greatly improved, and the LED lamp can adapt to different airflow environments and is convenient to adjust.

Description

Technical fields:

[0001] This utility model relates to a heat dissipation structure for an internal rotor motor with a motor controller. Background technology:

[0002] Traditional heat dissipation structures for internal rotor motors with built-in motor controllers have limited application functions and a single heat dissipation direction. When the heat dissipation direction needs to be changed for the application environment, the heat dissipation structure needs to be re-molded, resulting in high costs.

[0003] Defects or problems with existing technology:

[0004] 1. The heat dissipation aspect needs to be greatly limited by the application environment in the early stages of development. If various environmental conditions occur, the heat dissipation efficiency will be severely reduced.

[0005] 2. When it is necessary to change the heat dissipation direction, the fan blade design and installation dimensions need to be changed at the same time, resulting in excessively high mold opening costs.

[0006] 3. The product's motor and controller cannot simultaneously and efficiently utilize the air duct and the heat dissipation structure of the motor and control box.

[0007] 4. The airflow from the vent is not being utilized by the motor cooling fins. Summary of the Invention:

[0008] The purpose of this invention is to provide a heat dissipation structure for an internal rotor motor with a motor controller, thereby solving the technical problem that the heat dissipation structure for an internal rotor motor with a motor controller in the background technology is not efficient enough in terms of heat dissipation, and when the heat dissipation direction needs to be changed, the fan blade design and installation dimensions need to be changed at the same time, resulting in excessive mold opening costs.

[0009] The objective of this utility model is achieved through the following technical solution:

[0010] A heat dissipation structure for an internal rotor motor with a motor controller includes a motor body and a motor controller, wherein:

[0011] The motor body includes a stator assembly, an inner rotor assembly, a shaft, a motor housing, a front cover, and a rear cover. The front cover and the rear cover are respectively installed at both ends of the motor housing and form a cavity in the middle. The stator assembly and the inner rotor assembly are installed in the cavity. The inner rotor assembly is fitted outside the shaft. Bearings are installed in the middle of the front cover and the rear cover. The shaft is supported on the bearings in the middle. The two ends of the shaft extend out of the cavity to form a front shaft extension and a rear shaft extension. Several first heat dissipation fins protrude from the outer surface of the motor housing. The several first heat dissipation fins are arranged circumferentially at intervals, and a first air duct is formed between two adjacent first heat dissipation fins.

[0012] The motor controller includes a control box and a control circuit board installed inside the control box. The control box includes a top plate and a cylindrical part extending axially from the edge of the top plate. Several second heat dissipation ribs protrude from the outer surface of the cylindrical part. The several second heat dissipation ribs are arranged circumferentially at intervals, and a second air duct is formed between two adjacent second heat dissipation ribs.

[0013] The motor controller is axially mounted on the rear end cover; a heat dissipation structure is provided between the motor controller and the rear end cover, characterized in that: the heat dissipation structure includes an air guide plate, an air guide shroud, and the rear end cover includes an end plate and a mounting ring extending from the end plate; a plurality of first air guide holes are circumferentially arranged on the connecting plate between the end plate and the mounting ring, the first air guide holes facing the first heat dissipation fins; the control box is fitted inside the air guide shroud and then locked to the mounting ring with screws; the top plate, the air guide shroud, and the end plate form a heat dissipation cavity; the air guide plate is nested inside the rear end cover and divides the heat dissipation cavity into an upper cavity and a lower cavity; a second air duct connects to the lower cavity; a connecting hole is provided in the middle of the air guide plate to connect the upper cavity and the lower cavity; a fan is installed in the upper cavity or the lower cavity and connected to the rear shaft extension.

[0014] Preferably, the end plate and the mounting ring are spaced a certain axial distance apart, and the connecting plate is inclined.

[0015] Preferably, a wire passage hole is also provided on the air guide plate, and the wire passage hole is located outside the connecting hole.

[0016] Preferably, the second heat dissipation fin extends to the top surface of the top plate.

[0017] Preferably, a stepped stop is provided on the mounting ring.

[0018] Preferably, the fan is a centrifugal impeller or a regular fan, or a centrifugal impeller with axial flow.

[0019] Preferably, the angle between the air outlet direction of the first air guide hole and the first heat dissipation fin is within ±5 degrees.

[0020] Preferably, the angle between the air outlet direction of the first air guide hole and the first heat dissipation fin is 0 degrees.

[0021] Preferably, the fan is located above or below the central connecting hole in the air guide plate.

[0022] Compared with the prior art, this utility model has the following advantages:

[0023] Effect 1: This utility model features several first heat dissipation ribs protruding from the outer surface of the motor housing, arranged circumferentially at intervals, forming a first air duct between adjacent first heat dissipation ribs; several second heat dissipation ribs protruding from the outer surface of the cylindrical part of the motor controller, arranged circumferentially at intervals, forming a second air duct between adjacent second heat dissipation ribs; a heat dissipation structure is provided between the motor controller and the rear end cover, characterized in that: the heat dissipation structure includes an air guide plate, an air guide shroud, and a fan; the rear end cover includes an end plate and a mounting ring extending from the end plate; several first air guide holes are circumferentially arranged on the connecting plate between the end plate and the mounting ring, the first air guide holes facing the first heat dissipation ribs; the control box is fitted inside the air guide shroud and then locked to the mounting ring with screws; the top plate, air guide shroud, and end plate form a heat dissipation cavity; the air guide plate is nested inside the rear end cover, dividing the heat dissipation cavity into an upper cavity and a lower cavity; the second air duct connects to the lower cavity; a connecting hole is provided in the middle of the air guide plate to connect the upper cavity and the lower cavity; the fan is installed in the upper cavity or the lower cavity and connected to the rear shaft extension. This fully utilizes airflow to dissipate heat from the first and second heat dissipation fins, further improving heat dissipation efficiency;

[0024] Effect 2: When it is necessary to change the heat dissipation direction, simply reverse the air guide plate and the fan. That is, rotate the air guide plate 180 degrees and reverse it. Then, move the fan from the original installation in the upper cavity to the lower cavity, or move the fan from the original installation in the lower cavity to the upper cavity. The modification is simple, no need to re-mold, highly adaptable, and has low development cost.

[0025] Effect 3: By utilizing the airflow guiding effect of the air guide plate, the fan is installed above or below the connecting hole in the middle of the air guide plate, which plays a good role in airflow guiding. Moreover, the fan power is not high, making full use of airflow for heat dissipation, and the heat dissipation effect is further improved. Attached image description:

[0026] Figure 1 This is a perspective view of one angle of Embodiment 1 of this utility model;

[0027] Figure 2 This is a perspective view of another embodiment of the present invention;

[0028] Figure 3 This is an exploded view of one angle of Embodiment 1 of this utility model;

[0029] Figure 4 This is an exploded view from another angle of Embodiment 1 of this utility model;

[0030] Figure 5 This is a perspective view of the motor body according to Embodiment 1 of this utility model;

[0031] Figure 6 This is a front view of Embodiment 1 of this utility model;

[0032] Figure 7yes Figure 6 AA section view;

[0033] Figure 8 yes Figure 7 A schematic diagram of airflow in the middle;

[0034] Figure 9 This is a cross-sectional view of the fan and air guide plate installed in reverse according to Embodiment 2 of this utility model;

[0035] Figure 10 yes Figure 9 A schematic diagram of airflow direction. Detailed implementation method:

[0036] The present invention will now be described in further detail through specific embodiments and in conjunction with the accompanying drawings.

[0037] Example 1:

[0038] like Figures 1 to 8 As shown, this embodiment provides a heat dissipation structure for an internal rotor motor with a motor controller, including a motor body 1 and a motor controller 2, wherein:

[0039] The motor body 1 includes a stator assembly 11, an inner rotor assembly 12, a shaft 13, a motor housing 14, a front cover 15, and a rear cover 16. The front cover 15 and the rear cover 16 are respectively installed at both ends of the motor housing 14 and form a cavity 10 in the middle. The stator assembly 11 and the inner rotor assembly 12 are installed in the cavity 10. The inner rotor assembly 12 is fitted outside the shaft 13. A bearing 17 is installed between the front cover 15 and the rear cover 16. The shaft 13 is supported on the bearing 17 in the middle. The two ends of the shaft 13 extend out of the cavity 10 to form a front shaft extension 131 and a rear shaft extension 132. Several first heat dissipation fins 141 protrude from the outer surface of the motor housing 14. The several first heat dissipation fins 141 are arranged circumferentially at intervals, and a first air duct 142 is formed between two adjacent first heat dissipation fins 141.

[0040] The motor controller 2 includes a control box 20 and a control circuit board installed inside the control box 20. The control box 20 includes a top plate 21 and a cylindrical part 22 extending axially from the edge of the top plate 21. A plurality of second heat dissipation ribs 23 protrude from the outer surface of the cylindrical part 22. The plurality of second heat dissipation ribs 23 are arranged circumferentially at intervals, and a second air duct 24 is formed between two adjacent second heat dissipation ribs 23.

[0041] The motor controller 2 is axially mounted on the rear end cover 16; a heat dissipation structure is provided between the motor controller 2 and the rear end cover 16, characterized in that: the heat dissipation structure includes an air guide plate 3, an air guide shroud 4 and a fan 5; the rear end cover 16 includes an end plate 160 and a mounting ring 162 extending from the end plate 160; a plurality of first air guide holes 163 are circumferentially arranged on the connecting plate 161 between the end plate 160 and the mounting ring 162, and the first air guide holes 163 face the first heat dissipation fins 141; the control box 20 is fitted inside the air guide shroud 4 and then locked to the mounting ring 162 with screws; the top plate 21, the air guide shroud 4 and the end plate 160 form a heat dissipation cavity 6; the air guide plate 3 is nested inside the rear end cover 16 and divides the heat dissipation cavity 6 into an upper cavity 61 and a lower cavity 62; the second air duct 24 connects to the lower cavity 62; a connecting hole 31 is provided in the middle of the air guide plate 3 to connect the upper cavity 61 and the lower cavity 62; the fan 5 is installed in the lower cavity 62 and connected to the rear shaft extension 132.

[0042] This invention fully utilizes airflow to dissipate heat from the first and second heat dissipation fins, further improving heat dissipation efficiency. When the heat dissipation direction needs to be changed, simply reverse the air guide plate and fan; that is, rotate the air guide plate 180 degrees and install it backwards. Then, move the fan from its original position in the upper cavity to the lower cavity, or vice versa. Modification is simple, requires no new mold opening, is highly adaptable, and has low development costs. Utilizing the airflow guiding effect of the air guide plate, the fan is installed above or below the connecting hole in the middle of the air guide plate, achieving excellent airflow guidance. Furthermore, the fan power is not high, fully utilizing airflow for heat dissipation, further improving the heat dissipation effect.

[0043] Preferably, the end plate 160 and the mounting ring 162 are separated by a certain axial distance, and the connecting plate 161 is inclined, which is simple in structure and easy to install.

[0044] Preferably, a wire passage hole 32 is also provided on the air guide plate 3, and the wire passage hole 32 is located around the connecting hole 31.

[0045] Preferably, the second heat dissipation fin 23 extends to the top surface of the top plate 21, increasing the heat dissipation area and further improving the heat dissipation effect.

[0046] Preferably, a stepped stop 1621 is provided on the mounting ring 162, which makes installation simple.

[0047] Preferably, fan 5 is a centrifugal impeller or a regular fan, or a centrifugal impeller with axial flow.

[0048] Preferably, the angle between the air outlet direction of the first air guide hole 163 and the first heat dissipation fin 141 is within ±5 degrees, so as to make full use of the airflow to dissipate heat from the first heat dissipation fin.

[0049] Preferably, the optimal angle between the air outlet direction of the first air guide hole 163 and the first heat dissipation fin 141 is 0 degrees.

[0050] Preferably, the fan 5 is located above the central connecting hole 31 of the air guide plate 3. The installation position is critical, so as to give full play to the air guiding effect of the fan 5 and the air guide plate 3 and mobilize the flow of air.

[0051] When the fan 5 operates and generates positive airflow, the airflow passes through the first heat dissipation fin 141 and blows along the first air duct 142, the first air guide hole 163, the upper cavity 61, the connecting hole 31 in the middle of the air guide plate 3, and the lower cavity 62 towards the second heat dissipation fin 23. The airflow blows from the motor body 1 towards the motor controller 2.

[0052] Example 2:

[0053] like Figure 9 and Figure 10 As shown, this embodiment is a modification based on implementation one. When it is necessary to change the heat dissipation direction, it is only necessary to reverse the air guide plate 3 and the fan 5, that is, rotate the air guide plate 3 180 degrees and reverse it. Then, the fan 5 is moved from its original installation in the lower cavity 62 to the upper cavity 61. The modification is simple, does not require re-molding, has strong adaptability, and low development cost. Utilizing the airflow guiding effect of the air guide plate 3, the fan 5 is installed below the connecting hole 30 in the middle of the air guide plate 3, which plays a good role in airflow guiding. Moreover, the fan power is not high, making full use of airflow for heat dissipation, and the heat dissipation effect is further improved.

[0054] When the fan 5 operates and generates reverse airflow, the airflow passes through the second heat dissipation fin 23 and blows along the second air duct 24, the lower cavity 62, the connecting hole 31 in the middle of the air guide plate 3, the upper cavity 61 and the first air guide hole 163 toward the first heat dissipation fin 141; the airflow blows from the motor controller 2 toward the motor body 1.

[0055] The above embodiments are preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited thereto. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present utility model are equivalent substitutions and are included within the protection scope of the present utility model.

Claims

1. A heat dissipation structure for an internal rotor motor with a motor controller, comprising a motor body (1) and a motor controller (2), wherein: The motor body (1) includes a stator assembly (11), an inner rotor assembly (12), a shaft (13), a motor housing (14), a front cover (15), and a rear cover (16). The front cover (15) and the rear cover (16) are respectively installed at both ends of the motor housing (14) and form a cavity (10) in the middle. The stator assembly (11) and the inner rotor assembly (12) are installed in the cavity (10). The inner rotor assembly (12) is fitted outside the shaft (13). Bearings (17) are installed between the front cover (15) and the rear cover (16). The shaft (13) is supported on the bearing (17) in the middle. The two ends of the shaft (13) extend out of the cavity (10) to form the front shaft extension (131) and the rear shaft extension (132). Several first heat dissipation fins (141) protrude from the outer surface of the motor housing (14). The several first heat dissipation fins (141) are arranged circumferentially at intervals, and a first air duct (142) is formed between two adjacent first heat dissipation fins (141). The motor controller (2) includes a control box (20) and a control circuit board installed inside the control box (20). The control box (20) includes a top plate (21) and a cylindrical part (22) extending axially from the edge of the top plate (21). A plurality of second heat dissipation ribs (23) protrude from the outer surface of the cylindrical part (22). The plurality of second heat dissipation ribs (23) are arranged circumferentially at intervals, and a second air duct (24) is formed between two adjacent second heat dissipation ribs (23). The motor controller (2) is axially mounted on the rear end cover (16); a heat dissipation structure is provided between the motor controller (2) and the rear end cover (16), characterized in that: the heat dissipation structure includes a guide plate (3), a guide shroud (4) and a fan (5), the rear end cover (16) includes an end plate (160) and a mounting ring (162) extending from the end plate (160), and a plurality of first air guide holes (163) are circumferentially arranged on the connecting plate (161) between the end plate (160) and the mounting ring (162), the first air guide holes (163) facing the first heat dissipation fin (141); the control box ( 20) The top plate (21), the air guide (4) and the end plate (160) are fitted inside the air guide (4) and then locked in the mounting ring (162) with screws. The top plate (21), the air guide (4) and the end plate (160) form a heat dissipation cavity (6). The air guide plate (3) is nested in the rear end cover (16) to divide the heat dissipation cavity (6) into an upper cavity (61) and a lower cavity (62). The second air duct (24) connects to the lower cavity (62). A connecting hole (31) is set in the middle of the air guide plate (3) to connect the upper cavity (61) and the lower cavity (62). The fan (5) is installed in the upper cavity (61) or the lower cavity (62) and connected to the rear shaft extension (132).

2. The internal rotor electric machine heat dissipation structure with electric machine controller according to claim 1, characterized in that: There is a certain axial distance between the end plate (160) and the mounting ring (162), and the connecting plate (161) is inclined.

3. The internal rotor electric motor heat dissipation structure with electric machine controller according to claim 2, characterized in that: A wire passage hole (32) is also provided on the air guide plate (3), which is located outside the connecting hole (31).

4. The internal rotor electric motor heat dissipation structure with electric machine controller according to claim 3, characterized in that: The second heat dissipation fin (23) extends to the top surface of the top plate (21).

5. The internal rotor electric motor heat dissipation structure with electric machine controller according to claim 4, characterized in that: A stepped stop (1621) is provided on the mounting ring (162).

6. A heat dissipation structure of an internal rotor motor with a motor controller according to claim 1 or 2 or 3 or 4, characterized in that: The fan (5) is a centrifugal impeller or a regular fan, or a centrifugal impeller with axial flow.

7. The internal rotor electric motor heat sink structure with electric machine controller of claim 6, wherein: The angle between the air outlet direction of the first air guide hole (163) and the first heat dissipation fin (141) is within ±5 degrees.

8. The internal rotor electric motor heat sink structure with electric machine controller of claim 7, wherein: The optimal angle between the air outlet direction of the first air guide hole (163) and the first heat dissipation fin (141) is 0 degrees.

9. A heat dissipation structure of an internal rotor motor with a motor controller according to claim 1 or 2 or 3 or 4, characterized in that: The fan (5) is located above or below the central connecting hole (31) of the air guide plate (3).

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