Motor heat dissipation structure

Abstract

This utility model discloses a motor heat dissipation structure, including a hollow motor housing, a motor end cover covering one end of the motor housing, a rotating shaft disposed inside the motor housing, and a fan assembly disposed on the side of the motor end cover away from the motor housing. The fan assembly includes a wheel, a central shaft disposed in the middle of the wheel, one end of the rotating shaft fixed to the central shaft, and a plurality of blades disposed on the wheel. Each blade includes a connecting part and an expansion part. An air inlet shroud is disposed on the outside of the fan assembly, and a guiding space is formed between the air inlet shroud and the motor end cover. An air outlet is formed on the surface of the motor housing in the guiding space, and a protrusion is disposed on the side of the expansion part facing the air inlet and outlet. This application, by setting a positive air outlet, forms forced convection heat dissipation on the external surface when the motor starts. At the same time, by increasing the area of ​​the blades, the air volume at the air outlet is increased, thereby further improving the heat dissipation effect on the motor housing.

Description

Technical Field

[0001] This utility model relates to the field of heat dissipation structures, specifically to a heat dissipation structure for an electric motor. Background Technology

[0002] The heat generated by the main heat sources of the internal rotor brushless motor (mainly from the copper loss of the stator winding, the iron loss of the stator core, and the permanent magnet loss or winding copper loss on the rotor) must pass through multiple layers of media to finally reach the surface of the casing for dissipation.

[0003] The heat dissipation mechanism of the transmission motor usually needs to be equipped with an internal fan. However, the internal airflow of the traditional structure often lacks effective guidance, which can easily form eddies or dead zones. It is impossible to accurately guide the airflow to the heat source, resulting in low heat exchange efficiency. In addition, the fan itself also consumes power, thus causing poor heat dissipation performance. Utility Model Content

[0004] To address the aforementioned problems, this utility model provides a motor heat dissipation structure, comprising a hollow motor housing, a motor end cover covering one end of the motor housing, a rotating shaft disposed inside the motor housing, the rotating shaft passing through the middle of the motor end cover and extending from one side of the motor end cover, a fan assembly disposed on the side of the motor end cover away from the motor housing, the fan assembly comprising a disc, a central shaft disposed in the middle of the disc, one end of the rotating shaft fixed to the central shaft, a plurality of blades vertically arranged at predetermined intervals on the disc, each blade comprising a connecting portion and an expanding portion, an air inlet shroud disposed on the outside of the fan assembly, a guiding space formed between the air inlet shroud and the motor end cover, an air outlet formed on the surface of the motor housing in the guiding space, and a protrusion disposed on the side of the expanding portion facing the air inlet and outlet.

[0005] Furthermore, the connecting portion is located between the central axis and the expansion portion, and the surface area of ​​the expansion portion is 3 to 5 times the surface area of ​​the connecting portion.

[0006] Furthermore, the air inlet cover includes a cover body that covers the fan blade assembly. The cover body has a first extension portion formed in the direction of the motor housing. The motor end cover includes a cover body that covers one side of the motor housing. The cover body is connected to the side wall of the motor housing through a second extension portion. The air outlet is located between the first extension portion and the second extension portion. An air inlet grille is provided on the cover body.

[0007] Furthermore, a recessed area is provided in the middle of the cover, and the air inlet grille is located in the recessed area.

[0008] Furthermore, a ventilation groove is provided between the wheel and the central shaft, and the connecting part and the expansion part form a third extension on the side of the wheel facing the motor end cover, forming a ventilation channel between the wheel and the motor end cover, and the ventilation channel communicates with the air outlet.

[0009] Furthermore, a first inclined surface is provided between the cover and the first extension, and the first inclined surface is disposed opposite to the protrusion.

[0010] Furthermore, a second inclined surface is provided between the cover and the second extension.

[0011] Furthermore, a plurality of first fixing holes are provided on the cover, and a plurality of second fixing holes corresponding to the positions of the first fixing holes are provided at the end of the motor housing.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] This application utilizes the airflow guiding space between the air inlet shroud and the motor end cover, and sets an air outlet that directly faces the motor housing for convection, thereby forming forced convection heat dissipation on the outer surface when the motor starts. At the same time, because the area of ​​the expansion part is increased by the protrusion, the airflow of the air outlet is increased, thereby further improving the heat dissipation effect on the motor housing.

[0014] Additional aspects and advantages of this invention will be set forth in the description which follows, and some will be obvious from the description or may be learned by practice of the invention. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art 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 these drawings without creative effort.

[0016] Figure 1 This is an exploded view of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the wind turbine assembly of this utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the air inlet shroud of this utility model;

[0019] Figure 4 This is a schematic diagram of the structure of the motor end cover of this utility model;

[0020] Figure 5This is a schematic diagram of the structure of the motor housing of this utility model;

[0021] Figure 6 This is a cross-sectional view of the overall structure of this utility model.

[0022] The reference numerals and names in the figure are as follows:

[0023] Motor housing 100, motor end cover 200, rotating shaft 300, fan blade assembly 400, wheel 410, central shaft 420, blade 430, connecting part 431, expansion part 432, air inlet cover 500, air guiding space 600, air outlet 610, protrusion 433, cover body 510, first extension 520, cover body 210, second extension 220, air inlet grille 530, recessed area 540, ventilation slot 440, third extension 434, ventilation duct 620, first inclined surface 550, second inclined surface 230, first fixing hole 211, second fixing hole 110. Detailed Implementation

[0024] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0025] The present invention will now be described in more detail. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the invention. It should be noted that when an element is described as being "fixed to" another element, it can be directly on the other element, or one or more intermediate elements may exist between them. When an element is described as being "connected to" another element, it can be directly connected to the other element, or one or more intermediate elements may exist between them.

[0026] In the description of this utility model, it should be noted that directional terms such as "front, back, up, down, left, right," "horizontal, vertical, horizontal," and "top, bottom," indicating directions or positional relationships, are generally based on the directions or positional relationships shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or component referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself. In the description of this utility model, it should be noted that the use of terms such as "first" and "second" to define components is merely for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this utility model. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0027] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention.

[0028] Furthermore, the technical features involved in the different embodiments of this application described below can be combined with each other as long as they do not conflict with each other.

[0029] The preferred embodiments of this utility model will now be further described with reference to the accompanying drawings. Figure 1 , Figure 2 and Figure 6 As shown, the motor heat dissipation structure includes a hollow motor housing 100. A motor end cover 200 covers one end of the motor housing 100. A rotating shaft 300 is disposed inside the motor housing 100, passing through the middle of the motor end cover 200 and extending from one side of the motor end cover 200. A fan assembly 400 is disposed on the side of the motor end cover 200 away from the motor housing 100. The fan assembly 400 includes a wheel 410, and a central shaft 420 is disposed in the middle of the wheel 410. One side of the rotating shaft 300... The end is fixed on the central shaft 420. Several blades 430 are vertically arranged on the wheel 410 at preset intervals. Each blade 430 includes a connecting part 431 and an expansion part 432. An air inlet shroud 500 is provided on the outside of the fan assembly 400. A guide space 600 is formed between the air inlet shroud 500 and the motor end cover 200. An air outlet 610 is formed in the guide space 600 on the surface of the motor housing 100. A protrusion 433 is provided on the side of the expansion part 432 facing the air inlet / outlet 610.

[0030] In the working state of this application, the rotating shaft 300 rotates inside the motor housing 100 under the drive of the motor rotor (not shown in the figure), thereby driving the fan assembly 400 to rotate inside the air inlet shroud 500. During the rotation, external air enters the guide space 600 through the air inlet shroud 500, and then moves outward under the drive of the fan assembly 400. Finally, it forms forced convection heat dissipation on the outer surface of the motor housing 100 through the air outlet 610. During this process, since the expansion part 432 is provided with a protrusion 433 on the side facing the air outlet 610, the air volume of the air outlet 610 will increase, thereby improving the heat dissipation effect on the motor housing 100.

[0031] Compared with the prior art, this application utilizes the airflow guiding space 600 between the air inlet shroud 500 and the motor end cover 200, and sets an air outlet 610 that faces the motor housing 100 for convection, thereby forming forced convection heat dissipation on the outer surface when the motor starts. At the same time, since the area of ​​the expansion portion 432 is increased by the protrusion 433, the air volume of the air outlet 610 is increased, thereby further improving the heat dissipation effect on the motor housing 100.

[0032] Furthermore, based on the above embodiments, combined with Figure 1 and Figure 2 As shown, the connecting part 431 is located between the central shaft 420 and the expansion part 432. The surface area of ​​the expansion part 432 is 3 to 5 times that of the connecting part 431. Since the expansion part is closer to the air inlet shroud 500 than the connecting part 431, the surface area of ​​the expansion part 432 can further increase the air volume brought by the blade 430 when rotating, thereby increasing the air volume of the air outlet 610 and further improving the heat dissipation effect on the motor housing 100.

[0033] Furthermore, based on the above embodiments, combining 3 and Figure 4 As shown, the air inlet shroud 500 includes a shroud body 510 covering the fan blade assembly 400. The shroud body 510 has a first extension 520 forming towards the motor housing 100. The motor end cover 200 includes a cover body 210 covering one side of the motor housing 100. The cover body 210 is connected to the side wall of the motor housing 100 via a second extension 220. The air outlet 610 is located between the first extension 520 and the second extension 220. An air inlet grille 530 is provided on the shroud body 510. Figure 6As shown by the middle arrow, when the fan assembly 400 is started, the external airflow enters the guide space 600 through the air inlet grille 530, and then, under the rotation of the blades 430, it forms forced convection cooling on the outer surface of the motor housing 100 through the air outlet 610.

[0034] Furthermore, based on the above embodiments, combined with Figure 3 and Figure 6 As shown, a recessed area 540 is provided in the middle of the cover 510, and the air inlet grille 530 is disposed in the recessed area 540. By placing the air inlet grille 530 in the recessed area 540, the surface area of ​​the air inlet grille 530 can be increased, thereby increasing the overall air intake of the air inlet cover 500, thereby increasing the air output of the air outlet 610, and thus improving the heat dissipation effect on the motor housing 100.

[0035] Furthermore, based on the above embodiments, combined with Figure 2 and Figure 6 As shown, a ventilation groove 440 is provided between the wheel 410 and the central shaft 420. The connecting part 431 and the expansion part 432 form a third extension 434 on the side of the wheel 410 facing the motor end cover 200. A ventilation channel 620 is formed between the wheel 410 and the motor end cover 200, and the ventilation channel 620 communicates with the air outlet 610. Figure 6 As shown by the middle arrow, when the airflow enters the guide space 600, part of the airflow passes directly through the air outlet 610 under the rotation of the blades 430, while the other part of the airflow can pass through the ventilation groove 440 into the ventilation channel 620 between the wheel 410 and the motor end cover 200, and then pass through the air outlet 610 under the rotation and stirring of the third extension 434, thereby further increasing the air volume of the air outlet 610 and simultaneously achieving heat dissipation for the motor end cover 200.

[0036] Furthermore, based on the above embodiments, combined with Figure 3 and Figure 6 As shown, a first inclined surface 550 is provided between the cover 510 and the first extension 520, and the first inclined surface 550 is disposed opposite to the protrusion 433. This makes it more convenient for the external air to move outward under the drive of the fan assembly 400.

[0037] Furthermore, based on the above embodiments, combined with Figure 4 and Figure 6 As shown, a second inclined surface 230 is provided between the cover 210 and the second extension 220. The second inclined surface 230 is more conducive to a portion of the airflow entering the air outlet 610 through the ventilation channel 620, thereby further increasing the air volume of the air outlet 610.

[0038] Furthermore, based on the above embodiments, combined with Figure 4 and Figure 5 As shown, a plurality of first fixing holes 211 are provided on the cover 210, and a plurality of second fixing holes 110 corresponding to the positions of the first fixing holes 211 are provided at the end of the motor housing 100. When it is necessary to connect the motor end cover 200 and the motor housing 100, the first fixing holes 211 and the second fixing holes 110 are aligned with each other and then the screw is inserted.

[0039] The details of the above exemplary embodiments are provided, and the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be regarded as exemplary and non-limiting in all respects, and the scope of the present invention is defined by the appended claims rather than the foregoing description. Therefore, it is intended that all changes falling within the meaning and scope of equivalents of the claims be included within the present invention.

Claims

1. An electric motor heat dissipation structure, characterized by comprising: The utility model provides a hollow motor shell (100) is covered with motor end cover (200) on one end of motor shell (100), is provided with rotating shaft (300) in motor shell (100), rotating shaft (300) passes through the middle part of motor end cover (200) and extends from the side of motor end cover (200), is provided with fan blade assembly (400) on the side of motor end cover (200) away from motor shell (100), fan blade assembly (400) includes wheel disc (410), is provided with central shaft (420) in the middle part of wheel disc (410), one end of rotating shaft (300) is fixed on central shaft (420), a plurality of blades (430) are vertically arranged on wheel disc (410) along the interval of preset distance, the blade (430) includes connecting portion (431) and expansion part (432), is provided with air inlet cover (500) on the outside of fan blade assembly (400), the air inlet cover (500) and motor end cover (200) form the flow guide space (600) between, the flow guide space (600) is formed on the surface of motor shell (100) and forms air outlet (610), is provided with convex part (433) on the side of expansion part (432) towards air inlet and outlet (610).

2. The motor heat dissipation structure according to claim 1, characterized by The connecting portion (431) is located between the central shaft (420) and the expansion part (432), and the surface area of the expansion part (432) is 3 to 5 times the surface area of the connecting portion (431).

3. The motor heat dissipation structure according to claim 2, characterized by The air inlet cover (500) includes a cover body (510) covering the fan blade assembly (400), and the cover body (510) forms a first extension (520) towards the motor shell (100). The motor end cover (200) includes a cover body (210) covering one side of the motor shell (100), and the cover body (210) is connected to the side wall of the motor shell (100) through a second extension (220). The air outlet (610) is located between the first extension (520) and the second extension (220), and an air inlet grille (530) is arranged on the cover body (510).

4. The motor heat dissipation structure according to claim 3, characterized by The middle part of the cover body (510) is provided with a recessed area (540), and the air inlet grille (530) is arranged in the recessed area (540).

5. The motor heat dissipation structure according to claim 1, wherein An air vent groove (440) is arranged between the wheel disc (410) and the central shaft (420). The connecting portion (431) and the expansion part (432) form a third extension (434) on the side of the wheel disc (410) towards the motor end cover (200). An air vent (620) is formed between the wheel disc (410) and the motor end cover (200), and the air vent (620) is communicated with the air outlet (610).

6. The motor heat dissipation structure according to claim 3, wherein A first inclined surface (550) is arranged between the cover body (510) and the first extension (520), and the first inclined surface (550) is arranged opposite to the convex part (433).

7. The motor heat dissipation structure according to claim 3, wherein A second inclined surface (230) is arranged between the cover body (210) and the second extension (220).

8. The motor heat dissipation structure according to claim 3, wherein A plurality of first fixing holes (211) are arranged on the cover (210), and a plurality of second fixing holes (110) corresponding to positions of the first fixing holes (211) are arranged on an end of the motor shell (100).

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