A motor casing with high efficiency of heat dissipation and convenient disassembly and assembly

Abstract

This invention discloses a motor housing that is easy to assemble and disassemble and has high heat dissipation efficiency. It includes a housing body and a heat sink body mounted on the housing body via a detachable connection structure. The heat sink body includes a base plate and multiple heat sink fins, with heat dissipation channels penetrating the base plate on the fins. The heat dissipation channels are formed on the sides of the heat sink fins, with their axial direction forming an angle θ with the vertical direction satisfying: 30° ≤ θ ≤ 60°. The heat dissipation channels include an inlet expansion section, a throat narrow section, and an outlet expansion section sequentially connected along the airflow direction. Compared to existing technologies, the motor housing structure provided by this invention reduces the risk of dust accumulation and blockage through inclined channel openings and enhances airflow convection using a Venturi tube structure, achieving active and enhanced heat dissipation. The heat sink body is easy to disassemble and clean, facilitating maintenance.

Description

Technical Field

[0001] This invention belongs to the field of motor technology, and in particular relates to a motor housing that is easy to disassemble and reassemble and has high heat dissipation efficiency. Background Technology

[0002] When a motor is operating, its internal windings and core generate a significant amount of heat. If this heat cannot be dissipated in time, it will cause the motor to overheat, affecting efficiency, shortening its lifespan, and even leading to malfunctions. Currently, the most common heat dissipation method is to install heat sinks on the motor housing, increasing the surface area to enhance air convection cooling.

[0003] Various heat sink designs exist in the prior art. For example, patent document CN201720368258.6 discloses a detachable heat sink for electric motors, designed for easy maintenance. However, these traditional heat sink structures still have significant drawbacks in practical applications, especially under harsh operating conditions: 1) Prone to dust accumulation and blockage, resulting in severe reduction in heat dissipation efficiency: Common heat dissipation holes are usually vertically opened at the top of the heat dissipation fins or along the longitudinal direction of the fins, with their openings facing upwards or horizontally. In working environments with a lot of dust and lint, airborne particles are easily drawn into or deposited in these upward-facing heat dissipation holes under the influence of gravity. After long-term operation, dust accumulates continuously, eventually leading to blockage of the heat dissipation holes, narrowing or even completely closing the airflow channels, and causing a sharp drop in heat dissipation efficiency.

[0004] 2) Passive heat dissipation with limited convection efficiency: Traditional heat dissipation structures mainly rely on the "chimney effect" generated by the natural rise of hot air, or on passive airflow driven by a fan at the motor end for heat dissipation. The heat transfer intensity of this passive convection method is inherently limited. Once the airflow resistance increases due to dust accumulation in the heat dissipation channels, the airflow will be further weakened, forming a vicious cycle of "dust accumulation → increased resistance → poor heat dissipation → increased temperature".

[0005] 3) Inconvenient maintenance and cleaning, and difficulty in guaranteeing results: Although some designs take into account the removability of the heat sink to facilitate cleaning of surface dust, the accumulated dust deep within the already clogged, complex, and narrow internal heat dissipation channels is difficult to remove completely using conventional methods. This not only affects the cleaning effect but may also continue to affect heat dissipation performance during repeated installations due to incomplete cleaning.

[0006] In summary, existing motor cooling structures are insufficient in terms of dust prevention, active heat dissipation, and ease of maintenance, making it difficult to meet the requirements for long-term, stable, and efficient operation in harsh environments. Therefore, there is an urgent need in the field for a new motor housing cooling structure that can effectively prevent dust blockage, actively enhance airflow for heat dissipation, and facilitate cleaning and maintenance, thereby ensuring the reliability of the motor under complex operating conditions. Summary of the Invention

[0007] The main objective of this application is to provide a motor housing that is easy to disassemble and reassemble and has high heat dissipation efficiency, so as to solve the technical problem that the heat dissipation channel is easily blocked by dust accumulation in the prior art, resulting in a decrease in heat dissipation efficiency, and to achieve the technical effect of high efficiency, stable heat dissipation and easy maintenance.

[0008] To achieve the above objectives, the present invention adopts the following technical solution: A motor housing that is easy to assemble and disassemble and has high heat dissipation efficiency includes a housing body and a heat sink body mounted on the housing body via a detachable connection structure; the heat sink body includes a base plate for fitting the housing body and a plurality of heat dissipation fins disposed on the base plate and extending outward, wherein the heat dissipation fins are provided with heat dissipation channels penetrating the base plate. The heat dissipation channel is formed on the side of the heat dissipation fin, and the axial direction of the heat dissipation channel forms an angle θ with the vertical direction, wherein 30°≤θ≤60°; the heat dissipation channel includes an inlet expansion section, a throat narrow section and an outlet expansion section that are sequentially connected along the airflow direction.

[0009] Furthermore, the heat dissipation fins have heat dissipation channels with opposite inclination directions staggered on two opposite sides.

[0010] Furthermore, the inlet aperture Di of the inlet expansion section, the throat aperture Dn of the throat narrow section, and the outlet aperture Do of the outlet expansion section satisfy the following relationship: 1.5≤Di / Dn≤3, and 1.5≤Do / Dn≤3.

[0011] Furthermore, the axial length Ln of the narrow throat segment is 0.5 to 1 times its throat aperture Dn.

[0012] Furthermore, a temperature-responsive deformation element is fixedly provided on the inner wall of the narrow throat section. The deformation element is made of a bimetallic sheet or a shape memory alloy. When the housing temperature is lower than a preset threshold, the deformation element fits against the inner wall. When the housing temperature is higher than the preset threshold, the deformation element bends towards the center of the narrow throat section to reduce the cross-sectional area of ​​the throat and increase the local flow velocity.

[0013] Furthermore, the inner wall surface of the outlet expansion section is uniformly distributed with several interfering flow micro-pits to generate fluid micro-vortices and suppress boundary layer separation of the airflow in the expansion section.

[0014] Furthermore, the detachable connection structure includes mounting portions disposed at both ends of the housing body for mounting the heat sink body; the mounting portions are provided with snap-fit ​​grooves, and the base plate of the heat sink body is provided with snap-fit ​​blocks that cooperate with the snap-fit ​​grooves.

[0015] Furthermore, a limiting protrusion is provided in the snap-fit ​​groove, and a snap-fit ​​hole adapted to the limiting protrusion is provided on the snap-fit ​​block. The limiting protrusion is slidably disposed in the snap-fit ​​groove, and an elastic reset member is provided between it and the bottom of the snap-fit ​​groove.

[0016] Furthermore, the thermal expansion coefficient of the material of the limiting protrusion is greater than that of the material of the snap-fit ​​block; at room temperature, there is a clearance fit between the limiting protrusion and the snap-fit ​​hole; when the motor is heating up, the expansion amount of the limiting protrusion is greater than the expansion amount of the snap-fit ​​hole, forming a thermal interference self-locking fit.

[0017] Furthermore, the inner wall of the snap-fit ​​hole is formed with a slope; and support feet are provided on both sides of the bottom of the housing body.

[0018] Furthermore, the inner surface of the substrate used to bond the housing body is a rough surface treated with corona discharge, and a thermally conductive enhancement layer is provided on the rough surface.

[0019] Furthermore, the voltage of the corona treatment is 2.0~2.2kV, the current is 8A, the corona velocity is 40~50m / min, and the treatment time is 8~10s.

[0020] Furthermore, the thermally conductive reinforcing layer comprises diamond, polyethylene glycol, and isoflurane diisocyanate adhesive; the mass ratio of diamond, polyethylene glycol, and isoflurane diisocyanate adhesive is (2~4):(1~2):(4~8); the average relative molecular mass of polyethylene glycol is 19000~24000, and its phase transition temperature is 60~70℃.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows: In the easily detachable and highly efficient heat dissipation motor housing described in this invention, the heat dissipation channels are opened on the side of the heat dissipation fins with their axes inclined, changing the traditional upward or horizontal opening direction. This makes it difficult for dust to fall vertically and adhere, and it is more easily carried away by gravity or airflow, thereby reducing the risk of channel blockage at the source and ensuring long-term operational stability. Simultaneously, the heat dissipation channels are constructed as a Venturi tube structure including an inlet expansion section, a throat narrow section, and an outlet expansion section. When the fan-driven airflow at the motor end flows through this channel, the flow velocity increases and the static pressure decreases at the throat narrow section, where the cross-section is smallest, thus forming a local negative pressure zone around the inlet expansion section and the throat narrow section. This negative pressure effect can actively "draw in" cold air from the gaps between the heat dissipation fins and the surrounding environment, significantly enhancing the total airflow and convective heat transfer intensity through the heat dissipation area, achieving an actively enhanced heat dissipation effect. Furthermore, the detachable connection structure makes the heat dissipation fin body easy to disassemble and clean to restore its optimal heat dissipation performance. Attached Figure Description

[0022] Figure 1 This is an exploded view of the motor housing structure according to an embodiment of the present invention; Figure 2 This is a schematic cross-sectional view of the heat sink body according to an embodiment of the present invention; Figure 3 This is a schematic cross-sectional view of the heat sink body according to another embodiment of the present invention.

[0023] In the diagram: 1. Housing body; 11. Mounting section; 111. Snap-fit ​​groove; 112. Limiting protrusion; 12. Support foot; 2. Heat sink body; 21. Base plate; 211. Thermally conductive enhancement layer; 22. Heat sink fins; 23. Heat dissipation channel; 231. Inlet expansion section; 232. Narrow throat section; 233. Outlet expansion section; 24. Snap-fit ​​block; 25. Snap-fit ​​hole; 26. Pull ring. Detailed Implementation

[0024] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0025] Motors, as the core power source of modern industry, are widely used in fans, pumps, compressors, machine tools, and various automated equipment. However, during operation, motors generate a large amount of heat due to factors such as winding copper losses, core iron losses, and mechanical friction. If this heat cannot be dissipated in time, the internal temperature of the motor will continue to rise, which can lead to reduced efficiency, shortened insulation material life, or even motor burnout. Especially in harsh working conditions with high dust concentrations, such as in mines, building material processing, and outdoor construction machinery, traditional heat dissipation structures are prone to failure due to dust accumulation and blockage, seriously threatening the reliability and continuity of equipment operation. This invention addresses the above problems by proposing a motor housing solution that integrates efficient heat dissipation, active dust prevention, and convenient maintenance.

[0026] like Figures 1-2As shown, an embodiment of the present invention provides a motor housing that is easy to assemble and disassemble and has high heat dissipation efficiency. The motor housing includes a housing body 1 and a heat sink body 2 mounted on the housing body 1 via a detachable connection structure. The heat sink body 2 includes a base plate 21 for conforming to the outer wall of the housing body 1 and a plurality of heat dissipation fins 22 disposed on the base plate 21 and extending outward (i.e., away from the housing body 1). The heat dissipation fins 22 are provided with heat dissipation channels 23 penetrating the base plate 21. The heat dissipation channels 23 are formed on the side of the heat dissipation fins 22, rather than on the top or penetrating along the direction perpendicular to the base plate, and the axial direction of the heat dissipation channels 23 forms an angle θ with the vertical direction (i.e., the direction of gravity), where 30° ≤ θ ≤ 60°. The heat dissipation channels 23 include an inlet expansion section 231, a throat narrow section 232, and an outlet expansion section 233 that are sequentially connected along the airflow direction (generally from the inner side near the housing body 1 to the outer environment).

[0027] The core principle of the above structure lies in combining tilted dust prevention with the Venturi effect for active heat dissipation. First, the heat dissipation channels 23 are located on the tilted side of the heat dissipation fins 22, causing the opening direction of the channels to deviate from the direction in which dust most easily falls vertically. Under the influence of gravity, most dust particles will slide off or bounce off the surface of the heat dissipation fins 22, making it difficult for them to fall directly into the heat dissipation channels 23. Even if a small amount adheres, it is more easily carried away by subsequent airflow, fundamentally reducing the risk of blockage. Second, the heat dissipation channels 23 are constructed as Venturi tubes, meaning their cross-sectional area first contracts and then expands along the airflow direction. When hot air from inside the fan-driven housing at the motor end flows through the heat dissipation channels 23, according to Bernoulli's principle, the fluid velocity increases sharply when flowing through the narrow throat section 232, where the cross-sectional area is smallest, resulting in a significant decrease in static pressure at that point, forming a local negative pressure zone. This negative pressure zone generates a powerful suction effect, actively "ejecting" cool air from the gaps between the heat dissipation fins 22 and the surrounding environment into the airflow system, greatly enhancing the total airflow and convective heat transfer intensity through the heat dissipation area. Compared to traditional natural convection or simple forced convection relying on straight holes with uniform cross-sections, this active ejection mechanism based on the Venturi effect significantly improves heat dissipation efficiency, especially when the motor load suddenly increases and heat generation intensifies, enabling a rapid response and effectively suppressing temperature rise peaks. Overall, this design achieves a balance between dust prevention and efficient heat dissipation, ensuring the motor's long-term stable operation in harsh environments.

[0028] In this embodiment, the included angle θ of the axis of the heat dissipation channel 23 is preferably 45°. This angle effectively prevents dust from falling vertically and provides good self-cleaning guidance, while also taking into account the convenience of processing and manufacturing. Figure 2 As shown, the cross-section of the heat dissipation channel 23 is circular, and its Venturi structure is specifically as follows: the inlet expansion section 231 is a conical section. The truncated cone-shaped channel is used to smoothly guide the incoming airflow to the throat; the narrow throat section 232 is a short cylindrical channel with an axial length of Approximately 0.5 to 1 times its throat orifice diameter Dn, this section is the region with the highest flow velocity and lowest static pressure, and is also the key part for generating the ejection effect; the outlet expansion section 233 is also a conical section. The truncated cone-shaped channel is used to gently decelerate the high-speed airflow, partially restoring kinetic energy to pressure energy and reducing flow losses. Preferably, the cone angle of the outlet expansion section 233 is... The cone angle is smaller than that of the inlet expansion section 231. ,For example Approximately 8° The angle is approximately 15°, which helps to further suppress airflow separation during expansion and maintain flow stability.

[0029] remove Figure 2 In addition to the structure shown with a single-sided inclined heat dissipation channel 23, as an optimized design, heat dissipation channels 23 with opposite inclination directions can be staggered on two opposite sides of the heat dissipation fin 22. For example, the heat dissipation channel 23 on one side is inclined to the upper left, while the heat dissipation channel 23 on the other side of the adjacent or same fin is inclined to the upper right. This staggered layout forms a complex internal airflow path, which on the one hand generates turbulence, enhancing the heat exchange between the airflow and the inner wall of the heat dissipation fin 22; on the other hand, the mutual disturbance of airflows entering from different directions can more effectively blow away dust particles that may adhere to any side of the heat dissipation fin 22, further enhancing the self-cleaning capability. For motors operating in extremely dusty and highly polluted environments, this staggered array design has stronger resistance to dust accumulation and better heat dissipation robustness compared to channels inclined in a single direction.

[0030] Regarding the geometry of the heat dissipation channel 23, the inlet diameter Di of the inlet expansion section 231, the throat diameter Dn of the throat narrow section 232, and the outlet diameter Do of the outlet expansion section 233 satisfy the following relationship: 1.5≤Di / Dn≤3, and 1.5≤Do / Dn≤3. This dimensional relationship is an optimized range verified by fluid dynamics simulation and experiments. If Di / Dn or Do / Dn is too small (e.g., close to 1), the expansion or contraction effect is not obvious, and it is difficult to form a significant Venturi effect; if the ratio is too large, although the throat velocity will be higher, the flow separation loss at the inlet and outlet will increase sharply, and the overall pressure loss will be too large, possibly exceeding the driving capacity of the motor fan, thus reducing the effective flow rate. In a specific optimization example, Di : Dn : Do = 1.5 : 1 : 1.8 can be taken. This ratio maintains low flow resistance while generating a sufficiently strong ejector negative pressure, achieving a balance between heat dissipation performance and power consumption. Meanwhile, the axial length Ln of the narrow throat segment 232 is 0.5 to 1 times its throat aperture Dn. This length range ensures that the throat is long enough to establish a stable high-speed, low-pressure zone, but not so long as to cause unnecessary frictional losses. If the length is too short, the negative pressure zone will be unstable and the ejection effect will be weak; if it is too long, the frictional losses will increase, offsetting the benefits brought by ejection.

[0031] In this embodiment, the specific implementation of the detachable connection structure is as follows: Figure 1 As shown. The detachable connection structure includes mounting portions 11 located at both ends of the housing body 1 for mounting the heat sink body 2. The mounting portions 11 have snap-fit ​​grooves 111. Correspondingly, the base plate 21 of the heat sink body 2 has snap-fit ​​blocks 24 that mate with the snap-fit ​​grooves 111. Through the engagement of the snap-fit ​​blocks 24 and the snap-fit ​​grooves 111, the heat sink body 2 can be quickly and tool-free installed and removed, greatly facilitating regular cleaning and maintenance. To provide a more reliable connection and a more convenient disassembly feel, the snap-fit ​​grooves 111 have limiting protrusions 112, and the snap-fit ​​blocks 24 have snap-fit ​​holes 25 that mate with the limiting protrusions 112. During installation, the snap-fit ​​blocks 24 are aligned with the snap-fit ​​grooves 111 and inserted. The limiting protrusions 112 are compressed and slide into the snap-fit ​​holes 25, and then locked in place by a reset action, thereby fixing the heat sink body 2. During disassembly, simply apply a certain pulling force to cause the inner wall of the snap-fit ​​hole 25 to press against the limiting protrusion 112 and thus pull out the entire heat sink body 2.

[0032] Furthermore, the limiting protrusion 112 is slidably disposed within the locking groove 111. Specifically, the locking groove 111 is connected to a sliding groove, and the limiting protrusion 112 is slidably connected within the sliding groove. An elastic reset element, such as a compression spring, is provided between the limiting protrusion 112 and the bottom of the sliding groove. When the heat sink body 2 is disassembled, the inclined surface of the locking hole 25 presses against the limiting protrusion 112, causing the limiting protrusion 112 to slide towards the bottom of the sliding groove, thereby releasing the locking action. After disassembly, the limiting protrusion 112 automatically resets under the action of the elastic reset element, ready for the next installation. This sliding fit and elastic reset design makes the disassembly process smooth and effortless, and ensures the reusability and reliability of the connection structure. The inner wall of the locking hole 25 is formed with an inclined surface, which can be an annular inclined surface or a partial guide inclined surface. Its function is to guide and press the limiting protrusion 112 during disassembly, making the disengagement action smoother. In addition, support feet 12 are provided on both sides of the bottom of the housing body 1 to stably support the entire motor on the workbench or equipment base.

[0033] In another embodiment, the coefficient of thermal expansion of the limiting protrusion 112 is greater than that of the snap-fit ​​block 24. At room temperature, there is a clearance fit between the limiting protrusion 112 and the snap-fit ​​hole 25. When the motor is running hot, the expansion of the limiting protrusion 112 is greater than the expansion of the snap-fit ​​hole 25, forming a thermal interference self-locking fit. This thermal interference snap-fit ​​mechanism allows operators to easily pull and disassemble the motor for maintenance when it is stopped and cold. After the motor is started and heated, the snap-fit ​​point automatically expands and locks in place, becoming as secure as a bolt, completely eliminating the risk of loosening under long-term vibration associated with traditional snap-fit ​​mechanisms.

[0034] In another embodiment, such as Figure 3 As shown, to further improve the heat transfer efficiency from the housing body 1 to the heat sink body 2, the inner surface of the substrate 21, which is used to adhere to the housing body 1, has undergone special treatment and has a functional layer. Specifically, the inner surface of the substrate 21 is a roughened surface treated with corona discharge. Corona discharge is a surface modification technique that alters the molecular structure of a material surface through high-frequency, high-voltage discharge, increasing surface roughness, improving surface energy, and introducing polar groups. After corona discharge, the micro-uneven structure of the roughened surface greatly increases the mechanical engagement area with subsequent coatings. Preferably, the corona discharge process parameters are: voltage 2.0~2.2kV, current 8A, corona discharge velocity 40~50m / min, and processing time 8~10s. This combination of parameters effectively forms a uniform and moderate roughening and activation effect on the surface of the aluminum or aluminum alloy substrate 21, laying the foundation for the firm adhesion of subsequent coatings.

[0035] A thermally conductive reinforcing layer 211 is provided on the roughened surface formed by corona treatment. The thermally conductive reinforcing layer 211 is a composite functional coating containing three core components: diamond, polyethylene glycol and isoflurane diisocyanate (IPDI) adhesive, in a mass ratio of (2~4):(1~2):(4~8).

[0036] Diamond, known as the material with the highest thermal conductivity in nature (approximately 2000~2200 W / (m·K)), acts as a highly efficient thermally conductive filler in the coating, constructing a microscopic pathway for rapid heat conduction. This allows heat transferred from the housing body 1 to the substrate 21 to diffuse rapidly towards the heat dissipation fins 22. Polyethylene glycol (PEG) is used here as an organic solid-solid phase change material. This invention preferably uses PEG with an average relative molecular mass of 19000~24000, corresponding to a phase change temperature between 60~70℃. When the motor operates continuously and the housing temperature rises to 60~70℃, the PEG in the coating undergoes a solid-solid phase change, transforming from an ordered crystalline structure to a disordered amorphous structure. This process absorbs a large amount of latent heat. This characteristic makes the thermally conductive reinforcement layer 211 not only passively conduct heat but also possess an active "heat absorption" temperature regulation capability. It can effectively buffer the temperature rise when the motor temperature reaches the critical point, making it particularly suitable for coping with periodic overload or short-term high-load conditions. The isoflurane diisocyanate (IPDI) adhesive plays multiple roles: First, as a bonding matrix, it uniformly encapsulates and fixes diamond particles and polyethylene glycol, forming a stable coating structure. Second, its molecular chain ends are rich in highly reactive isocyanate groups (-NCO), which can chemically react with hydroxyl groups (-OH) and other active hydrogen-containing groups generated on the rough surface of the substrate 21 after corona treatment, forming strong urethane chemical bonds. This chemical bonding makes the bonding force between the thermally conductive reinforcing layer 211 and the substrate 21 far exceed that of ordinary physical adsorption or mechanical intercalation, significantly improving the interlayer adhesion and avoiding coating peeling caused by thermal expansion and contraction or vibration. In addition, the IPDI adhesive itself has good weather resistance and hydrolysis resistance, ensuring the stability of the coating in long-term use environments.

[0037] In another embodiment, such as Figure 1 As shown, a pull ring 26 can also be provided on the heat dissipation fins 22. The pull ring 26 provides a clear point of leverage for disassembling the heat dissipation fin body 2. Operators can easily hook or pull the pull ring 26 to apply force, making the disassembly process safer and less strenuous, especially suitable for situations where the installation location is compact or the heat dissipation fin body 2 itself is heavy. Preferably, the substrate 21 and the heat dissipation fins 22 are integrally formed by die casting of aluminum or aluminum alloy to ensure the integrity of the structure and optimal thermal conductivity continuity. The mounting part 11 can be designed as a ring, surrounding the end of the housing body 1, to provide symmetrical and balanced mounting support points.

[0038] In another embodiment, a temperature-responsive deformation element is fixedly disposed on the inner wall of the narrow throat segment 232. The deformation element is made of a bimetallic sheet or a shape memory alloy. When the housing temperature is lower than a preset threshold T1 (e.g., 60~80°C), the deformation element fits against the inner wall. When the housing temperature is higher than the preset threshold, the deformation element bends toward the center of the narrow throat segment 232 to reduce the throat cross-sectional area and increase the local flow velocity.

[0039] The introduction of temperature-responsive deformation components gives the narrow throat section 232 dynamic characteristics. When the motor is at high temperature, the throat shrinks, the airflow is extremely compressed and accelerated, and the local convective heat transfer coefficient increases nonlinearly. When the motor is at low temperature, the large aperture is restored, reducing the overall wind resistance loss of the motor.

[0040] In another embodiment, the inner wall surface of the outlet expansion section 233 is uniformly arrayed with several micron-sized turbulence-inducing micro-pits to generate fluid micro-vortices and suppress boundary layer separation of the airflow in the outlet expansion section. If the expansion angle of the outlet expansion section is too large, it may cause airflow to detach from the wall (boundary layer separation), generating vortex drag and counteracting the ejection effect. By setting turbulence-inducing micro-pits, the airflow generates tiny local vortices as it flows through them. These micro-vortices act like "fluid balls," tightly "pressing" the main airflow against the inner wall of the outlet expansion section, delaying or eliminating boundary layer separation.

[0041] The working process of this invention is as follows: The heat generated by the motor during operation is conducted to the heat sink body 2 through the wall of the housing body 1; the heat is first efficiently transferred to the substrate 21 through the thermally conductive reinforcement layer 211 with high bonding strength and high thermal conductivity, and then diffuses along the substrate 21 and the heat sink fins 22; at the same time, the fan at the end of the motor drives the internal hot air to flow; the hot air enters the inlet expansion section 231 of the heat sink fins 23 through the opening at the inlet of the heat sink fins 23 on the substrate 21; the airflow is accelerated when it flows through the narrow throat section 232, generating negative pressure, which draws cold air from the gaps of the heat sink fins 22 and the external environment; after the hot and cold air are mixed, they are discharged through the outlet expansion section 233, continuously carrying away the heat on the heat sink fins 22; since the heat sink fins 23 are opened at an angle, dust is difficult to accumulate; and the local high-speed airflow generated by the Venturi effect also has a certain self-cleaning effect on the inner wall of the fins. When maintenance is required, simply pull the pull ring 26 to overcome the elastic force of the elastic reset member and pull the heat sink body 2 out of the snap-fit ​​groove 111 of the mounting part 11 for cleaning. After cleaning, it can be reinstalled and used, making maintenance very convenient.

[0042] The orientation or spatial relationships involved in this invention, such as "top," "bottom," "inner," "outer," "axial," "radial," and "side," are all defined based on the perspective shown in the accompanying drawings. These expressions are intended only to simplify the description of the technical solutions of this invention and are not intended to imply or indicate that the elements referred to must be in a specific orientation or constructed and operated in a specific order. Therefore, the orientation terms mentioned herein should not be regarded as absolute limitations on the claims.

[0043] In the description of this invention, terms such as "installation," "connection," "setting," "opening," and "penetration" should be interpreted broadly. Specifically, a connection can be a fixed connection, a detachable connection, or even a structurally integral molding; it can refer to physical mechanical contact or the connection of a heat conduction path; furthermore, a connection includes both direct connection and indirect connection achieved through an intermediate medium. Those skilled in the art can determine the precise meaning of the above terms in this application based on the specific context and technical logic.

[0044] It should be clarified that, based on the disclosure and teachings of the above specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, the present invention is not limited to the specific embodiments described above, and any obvious improvements, substitutions, or modifications made by those skilled in the art based on the present invention are within the scope of protection of the present invention. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on the present invention.

Claims

1. A motor housing that is easy to disassemble and reassemble and has high heat dissipation efficiency, characterized in that: It includes a housing body and a heat sink body mounted on the housing body via a detachable connection structure; the heat sink body includes a base plate for fitting the housing body and a plurality of heat sink fins disposed on the base plate and extending outward, the heat sink fins being provided with heat dissipation channels penetrating the base plate. The heat dissipation channel is formed on the side of the heat dissipation fin, and the axial direction of the heat dissipation channel forms an angle θ with the vertical direction, wherein 30°≤ θ≤ 60°; the heat dissipation channel includes an inlet expansion section, a throat narrow section and an outlet expansion section that are sequentially connected along the airflow direction.

2. The motor housing according to claim 1, characterized in that: The heat dissipation fins have heat dissipation channels with opposite inclination directions on two opposite sides.

3. The motor housing according to claim 1, characterized in that: The inlet orifice diameter Di of the inlet expansion section, the throat orifice diameter Dn of the throat narrow section, and the outlet orifice diameter Do of the outlet expansion section satisfy the following relationship: 1.5≤Di / Dn≤3, and 1.5≤Do / Dn≤3.

4. The motor housing according to claim 3, characterized in that: The axial length Ln of the narrow throat section is 0.5 to 1 times its throat aperture Dn.

5. The motor housing according to claim 1, characterized in that: The detachable connection structure includes mounting portions disposed at both ends of the housing body for mounting the heat sink body; the mounting portions are provided with snap-fit ​​grooves, and the base plate of the heat sink body is provided with snap-fit ​​blocks that cooperate with the snap-fit ​​grooves.

6. The motor housing according to claim 5, characterized in that: The snap-fit ​​groove is provided with a limiting protrusion, and the snap-fit ​​block is provided with a snap-fit ​​hole that matches the limiting protrusion. The limiting protrusion is slidably disposed in the snap-fit ​​groove, and an elastic reset member is provided between it and the bottom of the snap-fit ​​groove.

7. The motor housing according to claim 1, characterized in that: The inner wall surface of the outlet expansion section is uniformly distributed with several turbulence-causing pits.

8. The motor housing according to any one of claims 1 to 7, characterized in that: The inner surface of the substrate used to bond the housing body is a rough surface treated with corona discharge, and a thermally conductive enhancement layer is provided on the rough surface.

9. The motor housing according to claim 8, characterized in that: The corona treatment voltage is 2.0~2.2kV, the current is 8A, the corona velocity is 40~50m / min, and the treatment time is 8~10s.

10. The motor housing according to claim 9, characterized in that: The thermally conductive reinforcement layer comprises diamond, polyethylene glycol, and isoflurane diisocyanate adhesive; the mass ratio of diamond, polyethylene glycol, and isoflurane diisocyanate adhesive is (2~4):(1~2):(4~8); the average relative molecular mass of polyethylene glycol is 19000~24000, and its phase transition temperature is 60~70℃.

Images