External rotor motor

Abstract

The utility model discloses an external rotor motor, which comprises a motor body and a motor controller, the motor controller is arranged on one side of the motor body and comprises a controller casing and a control circuit board, the controller casing comprises a top plate and a cylindrical side plate, a cavity is enclosed between the cylindrical side plate and the top plate, and the top plate is arranged in the cavity. The circuit board assembly is installed in the cavity, the circuit board assembly comprises a control circuit board and a metal radiator, the control circuit board is provided with a power device, the LED lamp is characterized in that the power device is located in the middle of the control circuit board, the metal radiator is installed on the power device, and a heat conduction silica gel block is further attached to the metal radiator or the power device. The metal radiator and the heat conduction silica gel block increase the heat radiation area, accelerate heat radiation, reduce the temperature rise of the motor and prolong the service life of the motor, the power device does not need to cover the edge of the control circuit board, and circuit wiring is more convenient.

Description

Technical Field

[0001] The utility model relates to an outer rotor motor, in particular to an outer rotor motor with a motor controller. Background Art

[0002] As the application of motors continues to expand, the requirements for motor power are getting higher and higher. Increasing motor power requires the use of larger power devices. However, high-power power devices have higher temperature rises, and the heat dissipation effect of the motor controller is also required to be higher. In order to improve the heat dissipation effect, existing high-power motor controllers often place power devices on one edge of the control circuit board, which in turn limits the circuit layout of the control circuit board. Therefore, a new heat dissipation solution needs to be designed to solve the problem. Utility Model Content

[0003] The utility model provides an outer rotor motor, which is used to solve the problem of insufficient heat dissipation effect of a high-power motor controller in the prior art.

[0004] The technical solution of the present utility model is achieved as follows:

[0005] The purpose of the utility model is to provide an outer rotor motor, comprising a motor body and a motor controller, the motor controller being mounted on one side of the motor body, the motor controller comprising a controller housing and a circuit board assembly, the controller housing comprising a top plate and a cylindrical side plate, a cavity being formed between the cylindrical side plate and the top plate, the circuit board assembly being mounted in the cavity, the circuit board assembly comprising a control circuit board and a metal radiator, the control circuit board being mounted with a power device, and characterized in that: the power device is located in the middle of the control circuit board, the metal radiator being mounted on the power device, and a thermally conductive silicone block being affixed to the metal radiator or the power device.

[0006] The top of the thermally conductive silica gel block contacts the bottom surface of the top plate.

[0007] The above-mentioned metal heat sink includes a sleeve portion and a heat dissipation platform. The sleeve portion is sleeved outside the power device and the inner wall of the sleeve portion is close to the outer side surface of the power device. The heat dissipation platform is connected to the top of the sleeve portion. The thermal conductive silicone block is installed on the heat dissipation platform, and the top plate is pressed on the thermal conductive silicone block.

[0008] Or the metal heat sink includes a vertical portion, which is fixed to one side of the power device, and a top of the vertical portion extends laterally to form a horizontal portion, which is suspended above the electronic components of the control circuit board.

[0009] The vertical portion is fixed on one side of the power device, and the thermally conductive silica gel block is attached to the other side of the power device.

[0010] Or the thermally conductive silica gel block is mounted on the top of the horizontal portion, and the top plate is pressed on the thermally conductive silica gel block.

[0011] The circuit board assembly further comprises a support frame, the bottom of which is fixed in the control circuit board, and the support frame supports the horizontal portion.

[0012] The support frame is installed at the edge of the control circuit board. A number of buckles are protruding from the bottom of the support frame. The control circuit board is provided with slots corresponding to the buckles. The buckles are locked in the slots to fix the support frame.

[0013] The bottom of the outer end of the horizontal part is protruded with a convex block, the top of the support frame is protruded with a boss, the boss is provided with a groove, the groove is arranged corresponding to the convex block, the outer end of the horizontal part is supported by the boss, and the convex block is stuck in the groove.

[0014] The power device and the vertical portion of the metal heat sink are fixed together by a clip.

[0015] Compared with the prior art, the utility model has the following advantages:

[0016] 1. The outer rotor motor includes a motor body and a motor controller. The motor controller is mounted on one side of the motor body. The motor controller includes a controller housing and a control circuit board. The controller housing includes a top plate and cylindrical side plates. The cylindrical side plates and the top plate define a cavity. The circuit board assembly is mounted within the cavity. The circuit board assembly includes a control circuit board and a metal heat sink. The control circuit board is mounted with a power device. The power device is located in the middle of the control circuit board. The metal heat sink is mounted on the power device. A thermally conductive silicone block is also attached to the metal heat sink or the power device. The metal heat sink and the thermally conductive silicone block increase the heat dissipation area, accelerate heat dissipation, reduce motor temperature rise, and extend motor life. The power device does not need to be covered by a cloth at the edge of the control circuit board, making circuit wiring more convenient.

[0017] 2. Other advantages of the present invention are described in detail in the embodiment section. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic structural diagram of an outer rotor motor provided in the first embodiment of the present utility model;

[0019] Figure 2 A top view of the outer rotor motor provided in Example 1;

[0020] Figure 3 for Figure 2 AA cross-sectional view;

[0021] Figure 4 for Figure 3 Enlarged view of point B;

[0022] Figure 5 An exploded view of the outer rotor motor provided in Example 1;

[0023] Figure 6 A schematic structural diagram of a circuit board assembly in an outer rotor motor provided in Example 1;

[0024] Figure 7 An exploded view of the circuit board assembly in the outer rotor motor provided in Example 1;

[0025] Figure 8 A cross-sectional view of the outer rotor motor provided in Example 2;

[0026] Figure 9 for Figure 8 Enlarged view of point C;

[0027] Figure 10 An exploded view of the outer rotor motor provided in Example 2;

[0028] Figure 11 A schematic structural diagram of a circuit board assembly in an outer rotor motor provided in Example 2;

[0029] Figure 12 A schematic structural diagram of the circuit board assembly in the outer rotor motor provided in the second embodiment from another angle;

[0030] Figure 13 An exploded view of the circuit board assembly in the outer rotor motor provided in Example 2;

[0031] Figure 14 A cross-sectional view of the outer rotor motor provided in Example 3;

[0032] Figure 15 for Figure 14 Enlarged view of point D;

[0033] Figure 16 This is a schematic structural diagram of the circuit board assembly in the outer rotor motor provided in Example 3. DETAILED DESCRIPTION

[0034] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0035] Example 1:

[0036] like Figures 1 to 7As shown, this embodiment provides an outer rotor motor, including a motor body 9 and a motor controller. The motor controller is installed on one side of the motor body 9. The motor controller includes a controller housing 1 and a circuit board assembly 2. The controller housing 1 includes a top plate 11 and a cylindrical side plate 12. A cavity 10 is formed between the cylindrical side plate 12 and the top plate 11. The circuit board assembly 2 is installed in the cavity 10. The circuit board assembly 2 includes a control circuit board 21 and a metal radiator 22. The control circuit board 21 is installed with a power device 211, which is characterized in that: the power device 211 is located in the middle of the control circuit board 21, the metal radiator 22 is installed on the power device 211, and a thermal conductive silicone block 23 is also attached to the metal radiator 22 or the power device 211.

[0037] In the outer rotor motor, the heat of the power device 211 is conducted to the cavity 10 through the metal radiator 22 and the thermally conductive silicone block 23. The metal radiator 22 and the thermally conductive silicone block 23 increase the heat dissipation area, accelerate heat dissipation, reduce the temperature rise of the motor, and extend the life of the motor. The power device 211 does not need to be covered on the edge of the control circuit board 21, and circuit wiring is more convenient.

[0038] The heat-conducting silica gel block 23 is coated with glue on one side, which is convenient for pasting and has a good heat dissipation effect.

[0039] The top of the thermally conductive silicone block 23 contacts the bottom surface of the top plate 11. The thermally conductive silicone block 23 directly conducts heat to the controller housing 1, further enhancing the heat dissipation effect. The controller housing 1 and the thermally conductive silicone block 23 do not need to be fixed separately, making installation easy.

[0040] The metal heat sink 22 comprises a sleeve portion 224 and a heat dissipation platform 225. The sleeve portion 224 is positioned over the power device 211, with its inner wall closely contacting the outer surface of the power device 211. The heat dissipation platform 225 is connected to the top of the sleeve portion 224. The thermally conductive silicone block 23 is mounted on the heat dissipation platform 225, with the top plate 11 pressing against the thermally conductive silicone block 23. The metal heat sink 22 is easy to install, and the sleeve portion 224 ensures full contact with the power device 211, resulting in better heat conduction.

[0041] Example 2:

[0042] like Figures 8 to 13 As shown, the outer rotor motor provided in this embodiment is similar to the outer rotor motor described in the first embodiment, except that:

[0043] The metal heat sink 22 includes a vertical portion 221 fixed to one side of the power device 211. The top of the vertical portion 221 extends laterally to form a horizontal portion 222, which overhangs the electronic components of the control circuit board 21. The metal heat sink 22 has a simple structure, and the horizontal portion 222 further increases the heat dissipation area without affecting the layout of the electronic components, thereby achieving effective heat dissipation.

[0044] The thermally conductive silica gel block 23 is mounted on the top of the horizontal portion 222 , and the top plate 11 is pressed on the thermally conductive silica gel block 23 .

[0045] The circuit board assembly 2 further includes a support frame 24, the bottom of which is fixed within the control circuit board 21. The support frame 24 supports the horizontal portion 222. The support frame 24 prevents the excessive weight of the metal heat sink 22 from bending the power device 211, and also prevents the horizontal portion 222 from contacting the electronic components below.

[0046] The support frame 24 is mounted on the edge of the control circuit board 21. A plurality of clips 241 protrude from the bottom of the support frame 24. The control circuit board 21 is provided with slots 212 corresponding to the clips 241. The clips 241 are locked in the slots 212 to fix the support frame 24. The support frame 23 has a simple structure.

[0047] The bottom of the outer end of the horizontal portion 222 has a protruding bump 223, and the top of the support frame 24 has a protruding boss 242. The boss 242 has a groove 243, which is corresponding to the boss 223. The outer end of the horizontal portion 222 is supported by the boss 242, and the boss 223 is stuck in the groove 243. The metal heat sink 22 and the support frame 24 are firmly connected.

[0048] The power device 211 and the vertical portion 221 of the metal heat sink 22 are fixed together by a clip 25. The fixing between the power device 211 and the metal heat sink 22 is convenient. As another option, the power device 211 and the metal heat sink 22 can also be fixed by screws.

[0049] Example 3:

[0050] like Figures 14 to 16 As shown, the outer rotor motor provided in this embodiment is similar to the outer rotor motor described in the second embodiment, except that:

[0051] The vertical portion 221 is fixed to one side of the power device 211, and the thermally conductive silicone block 23 is attached to the other side of the power device 211, with the top of the thermally conductive silicone block 23 resting against the bottom surface of the top plate 11. The metal heat sink 22 and the thermally conductive silicone block 23 conduct heat to the power device 211 in both directions, accelerating heat dissipation and reducing motor temperature rise.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. An outer rotor motor, comprising a motor body (9) and a motor controller, wherein the motor controller is mounted on one side of the motor body (9), the motor controller comprising a controller housing (1) and a circuit board assembly (2), the controller housing (1) comprising a top plate (11) and a cylindrical side plate (12), a cavity (10) being formed between the cylindrical side plate (12) and the top plate (11), the circuit board assembly (2) being mounted in the cavity (10), the circuit board assembly (2) comprising a control circuit board (21) and a metal heat sink (22), the control circuit board (21) being mounted with a power device (211), and characterized in that: The power device (211) is located in the middle of the control circuit board (21), the metal heat sink (22) is mounted on the power device (211), and a heat-conducting silica gel block (23) is also attached to the metal heat sink (22) or the power device (211).

2. The outer rotor motor according to claim 1, characterized in that: The top of the heat-conducting silica gel block (23) contacts the bottom surface of the top plate (11).

3. The outer rotor motor according to claim 2, characterized in that: The metal heat sink (22) comprises a sleeve portion (224) and a heat dissipation platform (225); the sleeve portion (224) is sleeved outside the power device (211) and the inner wall of the sleeve portion (224) is in close contact with the outer side surface of the power device (211); the heat dissipation platform (225) is connected to the top of the sleeve portion (224); the heat conductive silica gel block (23) is mounted on the heat dissipation platform (225); and the top plate (11) is pressed on the heat conductive silica gel block (23).

4. The outer rotor motor according to claim 2, characterized in that: The metal heat sink (22) comprises a vertical portion (221), the vertical portion (221) is fixed to one side of the power device (211), the top of the vertical portion (221) extends laterally to form a horizontal portion (222), and the horizontal portion (222) is suspended above the electronic components of the control circuit board (21).

5. The outer rotor motor according to claim 4, characterized in that: The vertical portion (221) is fixed on one side of the power device (211), and the heat-conducting silica gel block (23) is attached to the other side of the power device (211).

6. The outer rotor motor according to claim 4, characterized in that: The heat-conducting silica gel block (23) is mounted on the top of the horizontal portion (222), and the top plate (11) is pressed on the heat-conducting silica gel block (23).

7. The outer rotor motor according to claim 6, characterized in that: The circuit board assembly (2) further comprises a support frame (24), the bottom of which is fixed inside the control circuit board (21), and the support frame (24) supports the horizontal portion (222).

8. The outer rotor motor according to claim 7, characterized in that: The support frame (24) is installed at the edge of the control circuit board (21); a plurality of buckles (241) protrude from the bottom of the support frame (24); the control circuit board (21) is provided with a card slot (212) corresponding to the buckle (241); the buckle (241) is locked in the card slot (212) to fix the support frame (24).

9. The outer rotor motor according to claim 8, characterized in that: A convex block (223) is protruded from the bottom of the outer end of the horizontal portion (222), a boss (242) is protruded from the top of the support frame (24), the boss (242) is provided with a groove (243), the groove (243) and the convex block (223) are arranged correspondingly, the outer end of the horizontal portion (222) is supported by the boss (242), and the convex block (223) is stuck in the groove (243).

10. The outer rotor motor according to any one of claims 4 to 9, characterized in that: The power device (211) and the vertical portion (221) of the metal heat sink (22) are fixed together by a clip (25).

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