Motor heat dissipation structure and brushless motor

Abstract

The utility model belongs to the technical field of motors, and particularly relates to a motor heat dissipation structure and a brushless motor. The heat dissipation piece is arranged in the rotor assembly, so that when the rotor assembly and the stator assembly act, the heat dissipation piece and the rotor assembly rotate in a matched mode. The heat dissipation piece is arranged in the rotor assembly, the heat dissipation piece is clamped on the second shell, so that the heat dissipation piece is convenient and fast to mount and dismount, the blades are independently mounted and do not need to be integrally designed with the second shell, the complexity of the second shell is further reduced, and the mounting complexity is also reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of motors, and particularly relates to a motor heat dissipation structure and a brushless motor. Background Art

[0002] A brushless motor is a motor that controls the permanent magnet in the motor rotor through an electronic commutator (i.e., a brush). Compared with the traditional brushed DC motor, the brushless motor removes the brush and the mechanical commutator, so it has higher efficiency, longer life and lower maintenance cost.

[0003] During the operation of the brushless motor, a lot of heat is usually generated. If these heats are not discharged, heat accumulation will occur, resulting in damage to the inside of the motor. In some existing technologies, a fan is usually added at the bottom of the motor for heat dissipation, or the fan blade is arranged on the rotating shaft so that the fan blade rotates with the rotating shaft for heat dissipation.

[0004] The method of arranging the fan blade through the rotating shaft is usually fixed on the rotating shaft or integrally arranged on the base. This method has the problem of inconvenient disassembly. At the same time, in some brushless motors with the rotating motor housing, the fan blade fixed on the rotating shaft is not suitable for this structural design, because in the brushless motor with the rotating motor housing, a base is usually designed, and the extended part of the rotating shaft usually sinks into the base, so there is no part for connecting the fan blade. And for the miniaturization and streamlining of the motor, this method will also waste a certain amount of space. And in the way of integrally arranging the fan blade on the base, it will make the whole rotor structure and the motor base design more complex. Further, for some low-cost motors, the production process and complexity will also increase, resulting in an increase in production cost. Summary of the Utility Model

[0005] In order to solve the above problems, the utility model provides a motor heat dissipation structure and a brushless motor. By providing a heat dissipation part and sleeving the heat dissipation part on the rotor base through a socket, the disassembly and installation of the heat dissipation part are very convenient. At the same time, the structure at the bottom does not need to consider the part of the leaf, reducing the complexity of the whole base. At the same time, in a brushless motor with a rotating whole housing, there is no need to consider the connection part of the fan blade, reducing the complexity of the whole housing and the second housing, as well as the production complexity and installation complexity.

[0006] The purpose of the utility model is realized through the following technical solutions:

[0007] In a first aspect, the utility model provides a motor heat dissipation structure, including:

[0008] Stator assembly, the stator assembly is provided with a first housing, a coil structure assembly, and a bearing. The first housing is provided with a connecting sleeve, the coil structure assembly is fixed outside the connecting sleeve, and the bearing is arranged inside the connecting sleeve;

[0009] Rotor assembly, including a second housing, a rotating shaft, and a magnetic tile assembly. The second housing is provided with a boss, and a fixing hole is arranged on the boss. One end of the rotating shaft is fixedly connected in the fixing hole, and the other end of the rotating shaft is rotatably connected to the bearing and extends outside the first housing; the magnetic tile assembly is fixed on the inner peripheral side of the second housing, and the magnetic tile assembly is arranged on the outer peripheral side of the coil structure assembly;

[0010] Wherein, the rotor assembly is further provided with a heat dissipation component, and the heat dissipation component is fixed outside the boss.

[0011] By providing a heat dissipation component and sleeving the heat dissipation component on the boss of the second housing, the heat dissipation component is tightly installed in cooperation with the inclined surface and the second housing structure. When the second housing rotates, the heat dissipation component rotates with the second housing, making the installation and disassembly of the heat dissipation component more convenient. And the design of the heat dissipation component with quick disassembly avoids the design of the integral heat dissipation component and the second housing, reducing the complexity of the second housing design and the difficulty of the manufacturing process.

[0012] In some embodiments, the second housing is further provided with a base and a housing. The housing surrounds the stator assembly, and a fixing ring is arranged on the periphery of the base. The housing is arranged on the base through the fixing ring.

[0013] The second housing includes a base and a housing. The housing is arranged outside the stator assembly, and a fixing ring is arranged on the periphery of the housing. The base is clamped with the housing through the fixing ring, further enabling the housing to rotate with the base and also facilitating the flow of air.

[0014] In some embodiments, the fixing ring is further provided with a fixing position, a limiting block is arranged in the fixing position, and a limiting notch is arranged on the housing. The limiting block is clamped with the housing through the limiting notch.

[0015] The limiting block in the fixing position is used to limit the housing, further preventing the rotation misalignment between the housing and the base during rotation, and further preventing the damage caused by the friction of the connection part due to the misaligned rotation of the housing and the base.

[0016] In some embodiments, the heat dissipation component is provided with a first fan ring and a second fan ring. The first fan ring and the second fan ring are connected to both ends of the upper surface of the blade. An inclined surface is arranged on the periphery of the boss, and the first fan ring is clamped on the periphery of the boss.

[0017] The heat sink includes a first fan ring and a second fan ring. The socket is arranged inside the first fan ring. The second fan ring abuts against the external second housing to tightly fix the entire heat sink. The blades are arranged at the lower parts of the first fan ring and the second fan ring so that the blades are arranged below the entire heat sink. The periphery of the boss is provided with an inclined surface, and through the socket hole formed inside the first fan ring, the heat sink is sleeved on the periphery of the boss.

[0018] In some embodiments, the surface of the blade close to the first fan ring is an arc surface.

[0019] On the blade part close to the boss, an arc surface is provided to prevent the heat sink and the boss from rubbing against each other during installation, and further play a guiding role in the installation of the heat sink.

[0020] In some embodiments, the base is provided with a fan installation groove, and the fan installation groove is arranged around the periphery of the boss in a ring shape.

[0021] The base is provided with a fan installation groove. When the heat sink is installed into the fan installation groove, the base abuts against the outer periphery of the second fan ring of the heat sink to tightly fix the heat sink on the base in cooperation with the inclined surface and the fan installation groove.

[0022] In some embodiments, the bottom of the fan installation groove is provided with heat dissipation openings.

[0023] The bottom of the fan installation groove is provided with a plurality of heat dissipation openings so that when the heat sink dissipates heat, ventilation and heat dissipation are carried out through the heat dissipation openings.

[0024] In some embodiments, the boss is further provided with a concave surface, and the periphery of the bottom of the boss is provided with installation holes, and the installation holes are arranged at the bottom of the concave surface.

[0025] The boss is provided with a concave surface, which cooperates with the fixing holes at the same position so that the second housing can be fixed with screws from the other side of the base, and the screws are stuck into the concave surface.

[0026] In some embodiments, at the connection part between the rotating shaft and the fixing hole, a clamping protrusion is provided, and one side of the clamping protrusion is provided with a protruding inclined surface.

[0027] At the connection part between the rotating shaft and the fixing hole, a clamping protrusion is provided, one side of the clamping protrusion is an inclined surface, and a plurality of protruding inclined surfaces surround the periphery of the rotating shaft, and the protruding inclined surfaces face the same clockwise or counterclockwise direction to clamp the fixing hole.

[0028] In a second aspect, the present invention also provides a brushless motor, including the motor heat dissipation structure according to any one of the first aspect.

[0029] Inside the above-mentioned housing, a magnet is further fixed. Through the interaction between the magnet and the stator assembly, the fixed-integral housing, second housing, rotating shaft, and heat sink rotate together. The stator assembly is further provided with a power supply wire for external power supply.

[0030] The beneficial effects of a motor heat dissipation structure and a brushless motor of the present utility model are as follows:

[0031] By arranging a heat dissipation component in the rotor assembly, when the rotor assembly and the stator assembly act, the heat dissipation component rotates in cooperation with the rotor assembly. A heat dissipation component is arranged in the rotor assembly. By clamping the heat dissipation component on the second housing, the installation and disassembly of the heat dissipation component are convenient and fast, and the blades are installed separately without being integrally designed with the second housing, thereby reducing the complexity of the second housing and the installation complexity. Description of the Drawings

[0032] Figure 1 Partial exploded view of the motor heat dissipation structure of the present utility model;

[0033] Figure 2 Cross-sectional view of the present utility model;

[0034] Figure 3 Schematic diagram of the heat dissipation component of the present utility model;

[0035] Figure 4 Schematic diagram of the second housing of the present utility model;

[0036] Figure 5 is Figure 4 Enlarged view of part a;

[0037] Figure 6 Schematic diagram of the shaft part.

[0038] Reference Signs:

[0039] 100, stator assembly; 110, connecting sleeve; 120, coil structure assembly; 130, first housing; 140, bearing;

[0040] 200, rotor assembly; 210, shaft; 211, clamping protrusion; 220, second housing; 221, base; 2211, boss; 2212, fixing hole; 2213, fixing ring; 2214, fixing position; 2215, limiting block; 2216, fan installation groove; 2217, heat dissipation port; 2218, concave surface; 2219, installation hole; 222, outer shell; 2221, limiting notch; 230, magnetic tile assembly;

[0041] 300, heat dissipation component; 310, blade; 320, first fan ring; 330, second fan ring; 340, socket. Detailed Embodiment

[0042] It should be noted that, without conflict, the embodiments and technical features in the embodiments of the present utility model can be combined with each other. The detailed description in the specific implementation manners should be understood as an explanatory illustration of the gist of the present utility model and should not be regarded as an improper limitation to the present utility model.

[0043] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the following will further describe the specific technical solutions of the present utility model in detail in conjunction with the drawings in the embodiments of the present utility model. The following embodiments are used to illustrate the present utility model but are not used to limit the scope of the present utility model.

[0044] In the embodiments of the present utility model, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the embodiments of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more.

[0045] In addition, in the embodiments of the present utility model, the orientation terms such as "upper", "lower", "left" and "right" are defined relative to the orientation of the components shown in the drawings. It should be understood that these directional terms are relative concepts, and they are used for relative description and clarification, and they may change accordingly with the change of the orientation of the components placed in the drawings.

[0046] In the embodiments of the present utility model, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or integrated; it can be directly connected or indirectly connected through an intermediate medium.

[0047] In the embodiments of the present utility model, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion. Without further limitation, the element defined by the statement "comprising one..." does not exclude the existence of another identical element in the process, method, article or device comprising the element.

[0048] In the embodiments of the present utility model, words such as "exemplary" or "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design solution described as "exemplary" or "for example" in the embodiments of the present utility model should not be construed as being more preferred or having more advantages than other embodiments or design solutions. Exactly speaking, using words such as "exemplary" or "for example" aims to present the relevant in a specific manner.

[0049] Embodiment 1:

[0050] As Figures 1 to 2As shown in the figure, the present utility model proposes a motor heat dissipation structure, including:

[0051] A stator assembly 100, the stator assembly 100 is provided with a first housing 130, a coil structure assembly 120, and a bearing 140. The first housing 130 is provided with a connecting sleeve 110. The coil structure assembly 120 is fixed outside the connecting sleeve 110, and the bearing 140 is arranged inside the connecting sleeve 110;

[0052] A rotor assembly 200, including a second housing 220, a rotating shaft 210, and a magnetic tile assembly 230. The second housing 220 is provided with a boss 2211, and a fixing hole 2212 is arranged on the boss 2211. One end of the rotating shaft 210 is fixedly connected in the fixing hole 2212, and the other end of the rotating shaft 210 is rotatably connected to the bearing 140 and extends outside the first housing 130; the magnetic tile assembly 230 is fixed on the inner peripheral side of the second housing 220, and the magnetic tile assembly 230 is arranged on the outer peripheral side of the coil structure assembly 120;

[0053] Wherein, the rotor assembly 200 is further provided with a heat dissipation member 300, and the heat dissipation member 300 is fixed outside the boss 2211.

[0054] Specifically, a through connecting sleeve 110 is arranged in the stator assembly 100, and the rotating shaft 210 of the rotor assembly 200 is arranged between the stator assemblies 100 through the connecting sleeve 110. In order to further improve the rotational stability, when the rotating shaft 210 is installed inside the connecting sleeve 110, a bearing 140 is arranged, and the bearing 140 stabilizes the rotating shaft 210 in the connecting sleeve 110. A boss 2211 is arranged in the second housing 220, the boss 2211 is arranged in the middle, the boss 2211 is provided with a fixing hole 2212, and the fixing hole 2212 penetrates the entire boss 2211 and further penetrates the second housing 220. The heat dissipation member 300 is sleeved on the boss 2211 and is fastened and clamped in cooperation with the peripheral side of the second housing 220. By arranging the heat dissipation member 300, the heat dissipation member 300 is sleeved on the boss 2211 of the second housing 220 to complete the tight fitting installation of the heat dissipation member 300 in cooperation with the inclined surface and the structure of the second housing 220, so that when the second housing 220 rotates, the heat dissipation member 300 rotates with the second housing 220, making the installation and disassembly of the heat dissipation member 300 more convenient.

[0055] Embodiment 2:

[0056] As Figures 3 to 6 shown, based on Embodiment 1, this embodiment optimizes and describes the structure in Embodiment 1.

[0057] In some embodiments, the second housing 220 is further provided with a base 221 and an outer shell 222. The outer shell 222 surrounds the stator assembly 100. A fixing ring 2213 is provided on the peripheral side of the base 221, and the outer shell 222 is arranged on the base 221 through the fixing ring 2213.

[0058] Specifically, the second housing 220 includes a base 221 and an outer shell 222. The base 221 is arranged at one end of the outer shell 222. The outer shell 222 surrounds the stator assembly 100 and is fixed to the base 221 through the fixing ring 2213. The outer shell 222 is provided with one or more fixing rings 2213, and the outer shell 222 is clamped by the fixing ring 2213. The fixing ring 2213 can be a rubber ring. Further, in order to improve the clamping effect, a clamping groove can be provided at the part where the outer shell 222 is clamped to the fixing ring 2213 to improve the clamping stability. The rotor assembly 200 further includes the outer shell 222. A fixing ring 2213 is provided on the peripheral side of the second housing 220, and the outer shell 222 is clamped by the fixing ring 2213, further enabling the outer shell 222 to rotate following the base 221 and also facilitating the flow of air.

[0059] In some embodiments, the fixing ring 2213 is further provided with a fixing position 2214, and a limiting block 2215 is arranged in the fixing position 2214. The outer shell 222 is provided with a limiting notch 2221, and the limiting block 2215 clamps the outer shell 222 through the limiting notch 2221.

[0060] Specifically, in order to prevent the outer shell 222 and the second housing 220 from being misaligned during rotation, a plurality of notches, that is, fixing positions 2214, are provided on the fixing ring 2213. A limiting block 2215 is arranged in the fixing position 2214, and corresponding limiting notches 2221 are arranged at corresponding positions on the housing. During installation, the limiting block 2215 is installed corresponding to the limiting notch 2221. To limit the misaligned rotation of the outer shell 222 relative to the base 221 through the limiting block 2215. The limiting block 2215 in the fixing position 2214 is used to limit the outer shell 222, further preventing the misaligned rotation between the outer shell 222 and the base 221 during rotation, and further preventing the connection part from being damaged due to friction caused by the misaligned rotation of the housing and the base 221.

[0061] In some embodiments, the heat dissipation member 300 is provided with a first fan ring 320 and a second fan ring 330. The first fan ring 320 and the second fan ring 330 are connected to both ends of the upper surface of the blade 310. An inclined surface is provided on the peripheral side of the boss 2211, and the first fan ring 320 is clamped on the peripheral side of the boss 2211.

[0062] Specifically, the heat sink 300 is provided with a first fan ring 320 and a second fan ring 330. The first fan ring 320 is set as the inner ring of the heat sink 300, and the second fan ring 330 is the outer ring of the heat sink 300. The inner diameter of the first fan ring 320 is smaller than that of the second fan ring 330. And the two fan rings are arranged inside and outside and in the same plane. Both ends of the upper surface of the blade 310 are connected to the first fan ring 320 and the second fan ring 330 to fix the entire blade 310. When the heat sink 300 is fixed on the boss 2211 of the second housing 220, the boss 2211 is provided with an inclined surface, and the inner side surface of the first fan ring 320 can be set with a constant slope so that the first fan ring 320 is sleeved on the inclined surface of the boss 2211, and further fastened by the peripheral side of the base 221. During design, the slope of the inclined surface should be exactly such that after the blade 310 is clamped and fastened, it does not contact the inside of the base 221.

[0063] Furthermore, by setting different inner diameters of the inner rings of multiple first fan rings 320, multiple heat sinks 300 can be sleeved on the boss 2211, further realizing the linkage of multiple fan blades and further improving the heat dissipation effect.

[0064] In some embodiments, the surface of the blade 310 close to the first fan ring 320 is an arc surface.

[0065] Specifically, the surface of the blade 310 close to the first fan ring 320 is an arc surface, thereby preventing the blade 310 from scraping the inclined surface on the periphery of the boss 2211 during installation and making the blade 310 fit the entire boss 2211 more closely. An arc surface is provided on the part of the blade 310 close to the boss 2211 to prevent scraping between the heat sink 300 and the boss 2211 during installation, and further play a guiding role in the installation of the heat sink 300.

[0066] In some embodiments, the second housing 220 is provided with a fan installation groove 2216, and the fan installation groove 2216 is arranged around the periphery of the boss 2211.

[0067] Specifically, the base 221 of the second housing 220 is provided with a fan mounting groove 2216. The fan mounting groove 2216 is annularly arranged on the peripheral side of the boss 2211. The size of the fan mounting groove 2216 is the same as that of the second fan ring 330, or the size of the fan mounting groove 2216 is larger than that of the second fan ring 330, so as to produce an interference fit during installation. At the same time, when designing the slope of the inclined surface of the boss 2211, it can be designed in cooperation with the fan mounting groove 2216, so that when snap-fitting, the inclined surface snap-fitting can just prevent the blades 310 on the heat dissipation member 300 from contacting the bottom of the fan mounting groove 2216. The second housing 220 is provided with a fan mounting groove 2216. When the heat dissipation member 300 is installed into the fan mounting groove 2216, the second housing 220 abuts against the outer peripheral side of the second fan ring 330 of the heat dissipation member 300, so as to cooperate with the inclined surface and the fan mounting groove 2216 to fasten the heat dissipation member 300 on the second housing 220.

[0068] In some embodiments, the bottom of the fan mounting groove 2216 is provided with a heat dissipation opening 2217.

[0069] Specifically, the bottom of the fan mounting groove 2216 is provided with a heat dissipation opening 2217. The heat dissipation opening 2217 can be provided in multiple numbers and extend from the middle of the fan mounting groove 2216 towards the peripheral side, so that the heat inside the motor can be dissipated from the heat dissipation opening 2217. The bottom of the fan mounting groove 2216 is provided with a plurality of heat dissipation openings 2217, so that when the heat dissipation member 300 dissipates heat, ventilation and heat dissipation are carried out through the heat dissipation openings 2217.

[0070] In some embodiments, the boss 2211 is further provided with a concave surface 2218, and the peripheral side of the boss 2211 is provided with a mounting hole 2219. The mounting hole 2219 is arranged at the bottom of the concave surface 2218.

[0071] Specifically, the concave surface 2218 can be set during design, and a mounting hole 2219 is arranged at the bottom of the boss 2211 corresponding to the concave surface 2218, so that screws or other fixing parts can extend from the other side of the second housing 220 for fixing and extend to the concave surface 2218. The boss 2211 is provided with a concave surface 2218, which cooperates with the fixing hole 2212 at the same position, so that the second housing 220 can be fixed with screws from the other side where the heat dissipation member 300 is installed.

[0072] In some embodiments, at the connection part between the rotating shaft 210 and the fixing hole 2212, a snap-fit protrusion 211 is provided, and a protrusion inclined surface is arranged on one side of the snap-fit protrusion 211.

[0073] Specifically, at the connection part between the rotating shaft 210 and the fixing hole 2212, there are clamping protrusions 211. A plurality of clamping protrusions 211 are arranged on the circumferential side of the rotating shaft 210 to enable the rotating shaft 210 to rotate following the rotation of the second housing 220. And the axial directions of the inclined surfaces are the same, and can all face the clockwise or counterclockwise direction, so that the angular turning force of the rotating shaft 210 is more uniform. At the connection part between the rotating shaft 210 and the fixing hole 2212, there are clamping protrusions 211. One side of the clamping protrusion 211 is an inclined surface. A plurality of inclined surfaces of the protrusions surround the circumferential side of the rotating shaft 210, and the inclined surfaces of the protrusions face the same clockwise or counterclockwise direction to clamp the fixing hole 2212.

[0074] Embodiment 3:

[0075] Please refer to Figures 1 to 2 , based on Embodiment 1 and Embodiment 2, this embodiment proposes a brushless motor.

[0076] In some embodiments, the present utility model also proposes a brushless motor, including the motor heat dissipation structure according to any one of the first aspect.

[0077] Specifically, the rotor interacts with the coil structure assembly 120 in the stator assembly 100 through magnets, and / or magnetic tiles, and / or permanent magnets, so that the rotor assembly 200 rotates. And the magnets, and / or magnetic tiles, and / or permanent magnets are arranged inside the housing 222, so that the magnets, and / or magnetic tiles, and / or permanent magnets interact with the stator assembly 100 to generate a magnetic field, and drive the housing itself 222 through the magnets, further drive the second housing 220, and drive the rotating shaft 210 through the base 221 to further drive the external components to rotate. On the other side where the housing 222 is connected to the second housing 220, there is also a top cover. The top cover is not connected to the housing 222, but is rotatably fixed on the rotating shaft 210 to limit and protect the internal stator assembly 100. The coil assembly also includes a driving power line to provide a rotating power source from the outside.

[0078] The serial numbers of the utility model embodiments are only for description and do not represent the advantages or disadvantages of the embodiments. The above are only the preferred embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent device or equivalent process transformation made by using the specification and drawings of the present utility model, or directly or indirectly applied to other related technical fields, shall be included in the patent protection scope of the present utility model by the same token.

Claims

1. A motor heat dissipation structure, characterized in that, Comprising: A stator assembly (100), the stator assembly (100) is provided with a first housing (130), a coil structure assembly (120), a bearing (140), the first housing (130) is provided with a connecting sleeve (110), the coil structure assembly (120) is fixed outside the connecting sleeve (110), and the bearing (140) is arranged inside the connecting sleeve (110); A rotor assembly (200), including a second housing (220), a rotating shaft (210), and a magnetic tile assembly (230), the second housing (220) is provided with a boss (2211), a fixing hole (2212) is arranged on the boss (2211), one end of the rotating shaft (210) is fixedly connected in the fixing hole (2212), the other end of the rotating shaft (210) is rotatably connected to the bearing (140) and extends outside the first housing (130); the magnetic tile assembly (230) is fixed on the inner peripheral side of the second housing (220), and the magnetic tile assembly (230) is arranged on the outer peripheral side of the coil structure assembly (120); Wherein, the rotor assembly (200) is further provided with a heat dissipation member (300), and the heat dissipation member (300) is fixed outside the boss (2211).

2. The motor heat dissipation structure according to claim 1, characterized in that, The second housing (220) is further provided with a base (221) and a housing (222), the housing (222) surrounds the outside of the stator assembly (100), a fixing ring (2213) is arranged on the periphery of the base (221), and the housing (222) is arranged on the base (221) through the fixing ring (2213).

3. The motor heat dissipation structure according to claim 2, characterized in that, The fixing ring (2213) is further provided with a fixing position (2214), a limiting block (2215) is arranged in the fixing position (2214), the housing (222) is provided with a limiting notch (2221), and the limiting block (2215) is clamped to the housing (222) through the limiting notch (2221).

4. The motor heat dissipation structure according to claim 3, characterized in that, The heat dissipation member (300) is provided with a first fan ring (320), a second fan ring (330) and blades (310), the first fan ring (320) and the second fan ring (330) are connected to both ends of the upper surface of the blades (310), and a slope is arranged on the periphery of the boss (2211), and the first fan ring (320) is clamped on the periphery of the boss (2211).

5. The motor heat dissipation structure according to claim 4, characterized in that, The surface of the blade (310) close to the first fan ring (320) is an arc surface.

6. The motor heat dissipation structure according to claim 4, characterized in that, The base (221) is provided with a fan installation groove (2216), and the fan installation groove (2216) surrounds the periphery of the boss (2211).

7. The motor heat dissipation structure according to claim 6, characterized in that, A heat dissipation port (2217) is arranged at the bottom of the fan installation groove (2216).

8. The motor heat dissipation structure according to claim 7, characterized in that, The boss (2211) is further provided with a concave surface (2218), and mounting holes (2219) are arranged on the periphery of the bottom of the boss (2211), and the mounting holes (2219) are arranged at the bottom of the concave surface (2218).

9. The motor heat dissipation structure according to claim 4, characterized in that, At the connection part between the rotating shaft (210) and the fixing hole (2212), a clamping protrusion (211) is provided, and a protrusion inclined surface is arranged on one side of the clamping protrusion (211).

10. Brushless motor, characterized in that, Comprising the motor heat dissipation structure according to any one of claims 1-9.

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