PCBA heat dissipation structure and motor

Abstract

The utility model relates to the technical field of motors, and provides a PCBA heat dissipation structure and a motor, and the PCBA heat dissipation structure comprises a housing, an electric drive assembly, and a PCB. Wherein the electric drive assembly is installed in the shell, the electric drive assembly comprises a stator and a rotor, the stator is fixed to the shell, the rotor is inserted into the stator and can rotate relative to the stator, and blades are installed on the rotor; the rotor is installed in the shell, the PCB is installed in the shell and located on the axial side of the rotor, an electronic element is installed on the side, back to the rotor, of the PCB, an over-current copper sheet is installed on the end face of the side, back to the electronic element, of the PCB, the over-current copper sheet is electrically connected with the electronic element, and airflow generated by the blades can pass through the over-current copper sheet. Therefore, the over-current copper sheet exposed to the outside can dissipate heat more quickly, the overheating risk of the PCB is reduced, and the airflow generated when the rotor is started can accelerate the airflow speed around the over-current copper sheet, so that the heat dissipation efficiency is further improved.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a PCBA heat dissipation structure and a motor. Background Technology

[0002] A PCB, or Printed Circuit Board, is a core component of electronic devices, used for mechanical support and electrical connection of electronic components.

[0003] When the output power of the motor increases, a large amount of current needs to be passed through the PCB board, and its heat generation becomes more obvious. If heat is not dissipated in time, it can easily lead to hardware damage.

[0004] In existing PCBs, copper foil is embedded in the board body. The copper foil is used for conductivity, but as the current increases, the heat generated by the copper foil itself will increase, resulting in a decrease in conductivity.

[0005] Therefore, there is an urgent need for a PCBA heat dissipation structure and motor to solve the above-mentioned technical problems. Utility Model Content

[0006] The purpose of this invention is to propose a PCBA heat dissipation structure and motor that can improve the heat dissipation efficiency of the PCB board.

[0007] To achieve this objective, the present invention adopts the following technical solution:

[0008] PCBA heat dissipation structure includes:

[0009] case;

[0010] An electric drive assembly is installed inside the aforementioned housing. The electric drive assembly includes a stator and a rotor. The stator is fixed to the aforementioned housing. The rotor is inserted into the aforementioned stator and is rotatable relative to the aforementioned stator. The rotor is equipped with blades.

[0011] The PCB board is installed inside the housing and located on the axial side of the rotor. Electronic components are installed on the side of the PCB board opposite to the rotor. A current-carrying copper sheet is installed on the end face of the side opposite to the electronic components. The current-carrying copper sheet is electrically connected to the electronic components. The airflow generated by the blades can pass through the current-carrying copper sheet.

[0012] As a preferred technical solution of the above-mentioned PCBA heat dissipation structure, the PCB board is provided with insertion holes, the stator and / or the housing is provided with support columns, and the support columns are inserted into the insertion holes one by one, so that the PCB board and the rotor are spaced apart.

[0013] As a preferred technical solution for the above-mentioned PCBA heat dissipation structure, the PCB board is provided with gripping holes.

[0014] As a preferred technical solution of the above-mentioned PCBA heat dissipation structure, the housing includes an end cover, which is located on the side of the PCB board opposite to the rotor, and heat dissipation fins are provided on the side of the end cover opposite to the PCB board.

[0015] As a preferred technical solution of the above-mentioned PCBA heat dissipation structure, the end cover is provided with a bearing seat, and the rotor shaft passes through the PCB board and is inserted into the bearing seat.

[0016] As a preferred technical solution of the above-mentioned PCBA heat dissipation structure, the heat dissipation fin includes a first heat dissipation part, which extends radially along the rotor.

[0017] As a preferred technical solution of the above-mentioned PCBA heat dissipation structure, the heat dissipation fins further include a second heat dissipation part, which forms the peripheral edge of the end cover, and one end of the second heat dissipation part is connected to the first heat dissipation part.

[0018] As a preferred technical solution of the above-mentioned PCBA heat dissipation structure, the end cover is provided with a heat dissipation protrusion, which can fit with the above-mentioned electronic components.

[0019] As a preferred technical solution for the above-mentioned PCBA heat dissipation structure, a layer of thermal grease is provided between the heat dissipation boss and the electronic component.

[0020] An electric motor is also provided, including the aforementioned heat dissipation structure.

[0021] The beneficial effects of this utility model are:

[0022] This utility model provides a PCBA heat dissipation structure and a motor. The PCBA heat dissipation structure includes a housing, an electric drive assembly, and a PCB board. The electric drive assembly is installed inside the housing and includes a stator and a rotor. The stator is fixed to the housing, and the rotor is inserted into the stator and can rotate relative to the stator. The rotor is equipped with blades. The PCB board is installed inside the housing and located on the axial side of the rotor. Electronic components are mounted on the side of the PCB board facing away from the rotor, and a current-carrying copper plate is mounted on the end face of the side facing away from the electronic components. The current-carrying copper plate is electrically connected to the electronic components, and the airflow generated by the blades can pass through the current-carrying copper plate.

[0023] For example, the housing provides mounting space. The electric drive assembly includes a stator and a rotor. When the electric drive assembly is started, current flows through the stator, which generates a magnetic field. Under the action of this magnetic field, the rotor, according to Lorentz's law, experiences a force that generates a torque, thus causing it to rotate relative to the stator. The rotor is equipped with blades. When the rotor rotates, the blades can act on the surrounding air, generating an airflow along the rotor axis, which blows towards the PCB board. The PCB board is mounted inside the housing and is mainly used for integrating and mounting electronic components. The PCB board has embedded copper strips for heat dissipation. The copper strips are exposed to the outside, allowing for faster heat dissipation. Furthermore, the airflow generated when the rotor rotates passes through the copper strips, accelerating the airflow speed around the copper strips, thereby increasing its heat dissipation efficiency. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the PCB board structure provided in this embodiment of the utility model;

[0026] Figure 2 This is a schematic diagram of the end cap structure provided in an embodiment of the present utility model;

[0027] Figure 3 This is a schematic diagram of the heat dissipation structure of the PCBA provided in this embodiment of the utility model.

[0028] In the picture:

[0029] 110. End cap; 111. Heat dissipation fin; 1111. First heat dissipation section; 1112. Second heat dissipation section; 112. Bearing seat; 113. Heat dissipation boss; 120. Shell body;

[0030] 200. Electric drive assembly; 210. Stator; 211. Support column; 220. Rotor; 221. Blade;

[0031] 300, PCB board; 310, electronic components; 320, current-carrying copper sheet; 330, connector hole; 340, gripping hole. Detailed Implementation

[0032] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0033] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0035] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0036] like Figures 1 to 3As shown, this utility model provides a PCBA heat dissipation structure, including a housing, an electric drive assembly 200, and a PCB board 300. The electric drive assembly 200 is installed inside the housing and includes a stator 210 and a rotor 220. The stator 210 is fixed to the housing, and the rotor 220 is inserted into the stator 210 and can rotate relative to the stator 210. The rotor 220 is equipped with blades 221. The PCB board 300 is installed inside the housing and located on the axial side of the rotor 220. Electronic components 310 are installed on the side of the PCB board 300 opposite to the rotor 220, and a current-carrying copper sheet 320 is installed on the end face of the side opposite to the electronic components 310. The current-carrying copper sheet 320 is electrically connected to the electronic components 310, and the airflow generated by the blades 221 can pass through the current-carrying copper sheet 320.

[0037] For example, the housing provides installation space. The electric drive assembly 200 includes a stator 210 and a rotor 220. When the electric drive assembly 200 is started, current flows through the stator 210, which generates a magnetic field. Under the action of this magnetic field, the rotor 220 experiences a force and generates a torque according to Lorentz's law, thus rotating relative to the stator 210. The rotor 220 is equipped with blades 221. When the rotor 220 rotates, the blades 221 can act on the surrounding air to generate an airflow along the rotor 220 axis, which blows towards the PCB board 300. The PCB board 300 is installed inside the housing and is mainly used for integrating and installing electronic components 310. The PCB board 300 has embedded current-carrying copper sheets 320 on its exterior. The current-carrying copper sheets 320 are exposed to the outside for faster heat dissipation, and the airflow generated when the rotor 220 rotates passes through the current-carrying copper sheets 320, accelerating the airflow speed around the current-carrying copper sheets 320, thereby accelerating its heat dissipation efficiency.

[0038] Optionally, the PCB board 300 has insertion holes 330, and the stator 210 and / or the housing are provided with support columns 211. The support columns 211 are inserted into the insertion holes 330 one by one, so that the PCB board 300 and the rotor 220 are spaced apart.

[0039] For example, the PCB board 300 has multiple insertion holes 330, the stator 210 is fixed to the housing, the stator 210 is provided with support columns 211, and multiple support columns 211 are provided, each corresponding to one of the multiple insertion holes 330. During assembly, the support columns 211 are inserted into the corresponding insertion holes 330, and the abutting surface of the support columns 211 abuts against the PCB board 300. The PCB board 300 and the rotor 220 are spaced apart, and an airflow channel is formed between the PCB board 300 and the rotor 220. When the electric drive assembly 200 is started, the airflow generated when the rotor 220 rotates can be evenly blown onto the flow copper sheet 320 in the airflow channel.

[0040] Optionally, the PCB board 300 has gripping holes 340.

[0041] For example, the gripping hole 340 of the PCB board 300 is provided at the peripheral edge, and during assembly, the worker can clamp the PCB board 300 through the gripping hole 340.

[0042] Optionally, the housing includes an end cover 110, which is located on the side of the PCB board 300 opposite to the rotor 220. A heat dissipation fin 111 is provided on the side of the end cover 110 opposite to the PCB board 300.

[0043] For example, the housing includes an end cover 110 and a housing body 120, which are detachably connected. The stator 210 is fixed inside the housing body 120. When the electric drive assembly 200 is started, the airflow generated by the rotor 220 moves along its axial direction, passes through the PCB board 300, and exchanges heat with it. The airflow can transfer heat to the end cover 110. The side of the end cover 110 facing away from the PCB board 300 is provided with heat dissipation fins 111, which can increase the heat dissipation area and thus improve the heat dissipation efficiency.

[0044] Preferably, the end cap 110 is connected to the shell body 120 by threaded fasteners.

[0045] Preferably, an O-ring is provided between the end cap 110 and the shell body 120.

[0046] Optionally, the end cover 110 is provided with a bearing housing 112, and the rotor shaft of the rotor 220 passes through the PCB board 300 and is inserted into the bearing housing 112. For example, the bearing housing 112 includes a housing body and a bearing. The housing body is fixed to the end cover 110, the bearing is installed in the housing body, the outer ring of the bearing is fixed to the housing body, and the inner ring of the bearing is connected to the rotor 220. In this way, the end cover 110 can provide rotational support for the rotor 220, and the bearing housing 112 can reduce the friction between the rotor 220 and the end cover 110.

[0047] Optionally, the heat dissipation fin 111 includes a first heat dissipation portion 1111, which extends radially along the rotor 220. This configuration allows the first heat dissipation portion 1111 to cover a relatively large area of ​​the end face, increasing the heat dissipation area of ​​the end cover 110 and thus improving heat dissipation efficiency.

[0048] Furthermore, an airflow channel is formed between two adjacent first heat dissipation sections 1111 to reduce the impact of mutual heat dissipation.

[0049] Optionally, the heat dissipation fin 111 further includes a second heat dissipation portion 1112, which forms the peripheral edge of the end cover 110, and one end of the second heat dissipation portion 1112 is connected to the first heat dissipation portion 1111. This arrangement can further increase the heat dissipation area of ​​the end cover 110 and improve the heat dissipation efficiency.

[0050] Optionally, the end cover 110 is provided with a heat dissipation protrusion 113, which can fit against the electronic component 310. This configuration can reduce the involvement of gas during heat transfer, and the direct contact between the electronic component 310 and the end cover 110 has higher thermal conductivity, so that the PCB board 300 can transfer the heat it generates to the end cover 110 for heat dissipation more quickly.

[0051] Optionally, a thermal paste layer is provided between the heat dissipation boss 113 and the electronic component 310. The thermal paste layer can fill the gap between the heat dissipation boss 113 and the electronic component 310, and expel the air between them. The thermal paste has a strong thermal conductivity, thereby accelerating the heat dissipation process from the PCB board 300 to the end cover 110.

[0052] An electric motor is also provided, including the aforementioned heat dissipation structure.

[0053] Furthermore, the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A PCBA heat dissipation structure, characterized in that, include: case; An electric drive assembly (200) is installed inside the housing. The electric drive assembly (200) includes a stator (210) and a rotor (220). The stator (210) is fixed to the housing. The rotor (220) is inserted into the stator (210) and can rotate relative to the stator (210). The rotor (220) is equipped with blades (221). A PCB board (300) is installed inside the housing and located on the axial side of the rotor (220). An electronic component (310) is installed on the side of the PCB board (300) facing away from the rotor (220). A current-carrying copper sheet (320) is installed on the end face of the side facing away from the electronic component (310). The current-carrying copper sheet (320) is electrically connected to the electronic component (310). The airflow generated by the blade (221) can pass through the current-carrying copper sheet (320).

2. The PCBA heat dissipation structure according to claim 1, characterized in that, The PCB board (300) has insertion holes (330), and the stator (210) and / or the housing are provided with support columns (211). The support columns (211) are inserted into the insertion holes (330) one by one, so that the PCB board (300) and the rotor (220) are spaced apart.

3. The PCBA heat dissipation structure according to claim 1, characterized in that, The PCB board (300) has gripping holes (340).

4. The PCBA heat dissipation structure according to claim 1, characterized in that, The housing includes an end cap (110), which is located on the side of the PCB board (300) opposite to the rotor (220). The side of the end cap (110) opposite to the PCB board (300) is provided with heat dissipation fins (111).

5. The PCBA heat dissipation structure according to claim 4, characterized in that, The end cap (110) is provided with a bearing seat (112), and the shaft of the rotor (220) passes through the PCB board (300) and is inserted into the bearing seat (112).

6. The PCBA heat dissipation structure according to claim 4, characterized in that, The heat dissipation fin (111) includes a first heat dissipation part (1111) which extends radially along the rotor (220).

7. The PCBA heat dissipation structure according to claim 6, characterized in that, The heat dissipation fin (111) further includes a second heat dissipation part (1112), which forms the peripheral edge of the end cap (110), and one end of the second heat dissipation part (1112) is connected to the first heat dissipation part (1111).

8. The PCBA heat dissipation structure according to claim 4, characterized in that, The end cap (110) is provided with a heat dissipation protrusion (113), which can fit with the electronic component (310).

9. The PCBA heat dissipation structure according to claim 8, characterized in that, A layer of silicone grease is provided between the heat dissipation boss (113) and the electronic component (310).

10. An electric motor, characterized in that, Includes the heat dissipation structure as described in any one of claims 1-9.

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