Motor cover, motor rotor and motor

Abstract

The utility model relates to the technical field of motors, in particular to a motor cover, a motor rotor and a motor. The motor comprises the motor rotor. The motor rotor comprises the motor cover. The motor cover comprises a rotor cover and a heat dissipation cover; the heat dissipation cover comprises a main body which is matched with the rotor cover and is fixedly connected with the rotor cover; the plurality of heat dissipation pieces are arranged on one side, close to the rotor cover, of the main body, and are arranged around the central axis of the main body; and the flow guide part is arranged on the edge of the outer side of the main body and obliquely extends outwards relative to the main body. According to the utility model, the radiating cover and the rotor cover are designed in a split manner, so that the mass distribution of the motor cover is optimized, the weight of the motor cover is reduced, and the energy consumption of the motor is reduced; the heat dissipation cover is provided with a flow guide piece, the heat dissipation path of hot air flow is prolonged, and the air dissipation outlet is prolonged; meanwhile, the heat dissipation cover is provided with the heat dissipation piece, hot air flow is guided to flow along the heat dissipation piece in an accelerated mode, and heat dissipation efficiency is improved.

Description

[Technical Field]

[0001] This utility model relates to the field of motor technology, and in particular to a motor cover, a motor rotor, and a motor. [Background Technology]

[0002] As the power source for most mechanical equipment, electric motors play a crucial role in the transmission of various mechanisms. Motors with external rotor structures typically do not have a sealed cover to utilize natural convection for heat dissipation. Adding a sealed cover for rain or dust protection can lead to poor heat dissipation and significantly increase the motor's failure rate.

[0003] Therefore, it is necessary to provide a motor cover, an electrode rotor, and a motor to solve the above problems. [Utility Model Content]

[0004] This utility model provides a motor cover, a motor rotor, and a motor to solve the aforementioned problem of poor motor heat dissipation.

[0005] This utility model provides a motor cover, which includes: a rotor cover; and a heat dissipation cover. The heat dissipation cover includes: a main body, which is configured to cooperate with and be fixedly connected to the rotor cover; a plurality of heat dissipation components, which are disposed on the side of the main body near the rotor cover and are arranged around the central axis of the main body; and a flow guide, which is disposed on the outer edge of the main body and extends outward at an angle relative to the main body.

[0006] In some embodiments, the body includes a central portion, an edge portion, and a connecting portion, wherein the central portion and the edge portion are located on different planes, and the connecting portion connects the central portion and the edge portion to give the body a continuous surface.

[0007] In some embodiments, the rotor cover includes a central body, an edge body, and a plurality of ribs that are fixedly connected to the central body and the edge body. The central body is disposed corresponding to the central portion, and the edge body is disposed corresponding to the edge portion.

[0008] In some embodiments, the heat sink extends radially from the body to the flow guide, and the volume of the heat sink near the center is greater than the volume of the heat sink near the flow guide.

[0009] In some embodiments, the heat dissipation cover further includes several claws, which are disposed on the side of the main body near the rotor cover corresponding to the ribs, and the claws hold and fix the ribs.

[0010] In some embodiments, the central body is provided with a boss, and the central portion is provided with a through hole corresponding to the boss; the boss is provided with a through hole, and the center lines of the through hole, the boss, and the through hole are aligned.

[0011] Meanwhile, a motor rotor is also provided, which includes a rotor sidewall, any of the motor covers described above, and a plurality of magnets, wherein the rotor sidewall is fixedly connected to the motor cover; the plurality of magnets are arranged in a ring on the inner side of the sidewall.

[0012] In some embodiments, the motor rotor further includes rotor teeth, which are disposed on the motor cover and abut against the rotor sidewall. The rotor sidewall and the rotor teeth cooperate to form a mounting groove for mounting the magnet.

[0013] Also provided is an electric motor, comprising: a motor stator; any of the motor rotors described above, wherein the motor stator is energized to generate a magnetic field to drive the motor rotor to rotate; and a motor shaft, wherein the motor shaft is fixed to the motor rotor and rotates synchronously and coaxially with the motor rotor.

[0014] In some embodiments, the motor stator includes a stator base with a hollow tube structure, a bearing assembly, and a stator winding, the stator winding being fixed to the stator base; the motor shaft is inserted into the hollow tube structure and is movably connected to the stator base through the bearing assembly.

[0015] Compared with motor covers in related technologies, the motor cover provided by this utility model has a separate design for the heat dissipation cover and the rotor cover, which optimizes the mass distribution of the motor cover, reduces the weight of the motor cover, and reduces the energy consumption of the motor; the heat dissipation cover is provided with a guide component, which extends the heat dissipation path of the hot airflow and extends the air outlet; the heat dissipation cover is provided with a heat dissipation component, which guides the hot airflow to accelerate along the heat dissipation component and improves the heat dissipation efficiency. [Attached Image Description]

[0016] Figure 1 This is a three-dimensional structural diagram of an electric motor provided for an embodiment of the present utility model.

[0017] Figure 2 for Figure 1 The diagram shown is a three-dimensional exploded view of the motor.

[0018] Figure 3 for Figure 1 The diagram shows a three-dimensional structure of the motor from another perspective.

[0019] Figure 4 for Figure 1 The diagram shows a three-dimensional structure of the motor cover.

[0020] Figure 5 for Figure 1 The cross-sectional view of the heat sink shown.

Detailed Implementation Methods

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only one embodiment of the present utility model, and not all embodiments.

[0022] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0023] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features.

[0024] Please see Figure 1 , Figure 1 This is a three-dimensional structural diagram of an electric motor provided in an embodiment of the present invention. The motor 100 includes a motor stator 1, a motor rotor 3, and a motor shaft 5. The motor shaft 5 is fixed to the motor rotor 3; when the motor stator 1 is energized, it generates a changing magnetic field to drive the motor rotor 3 to rotate. The motor rotor 3 rotates relative to the motor stator 1, and the motor shaft 5 rotates synchronously and coaxially with the motor rotor 3.

[0025] Please see Figure 2 , Figure 2 for Figure 1 The diagram shows an exploded perspective view of the motor. The motor rotor 3 includes a rotor sidewall 31, a motor cover 33, rotor teeth 35, and multiple magnets (not shown). The motor shaft 5 has a first end 51 and a second end 53 along its length. The first end 51 is fixed to the motor cover 33 so that the motor shaft 5 and the motor cover 33 rotate synchronously and coaxially. The rotor sidewall 31 is fixedly connected to the motor cover 33, for example, by adhesive. The rotor teeth 35 are disposed on the motor cover 33 and extend toward the motor stator 1. The rotor teeth 35 abut against the rotor sidewall 31, and the rotor sidewall 31 and the rotor teeth 35 cooperate to form a mounting groove for positioning and mounting the magnets.

[0026] Multiple magnets are arranged in a ring on the inner side of the rotor sidewall 31. Specifically, the multiple magnets are arranged in a Helbeck array. In this embodiment, the magnets can be fixed to the inner side of the rotor sidewall 31 by adhesive bonding. In other embodiments, they can also be fixed to the inner side of the rotor sidewall 31 by riveting or other methods.

[0027] The motor stator 1 includes a stator base 11 with a hollow tube structure 111, a bearing assembly 13, and a stator winding 15. The stator winding 15 includes a winding core 151 and a coil 153 wound on the outer surface of the winding core 151. The winding core 151 is fixed to the stator base 11. In this embodiment, the winding core 151 and the stator base 11 are provided with multiple threaded holes corresponding to each other. The winding core 151 can be fixed to the stator base 11 by bolts. In other embodiments, the winding core 151 can also be fixed to the stator base 11 by welding or other methods. The second end 53 of the motor shaft 5 is inserted into the hollow tube structure 111 and is movably connected to the stator base 11 through the bearing assembly 13.

[0028] When the stator winding 15 is energized, it generates a changing rotating magnetic field, while the magnet of the motor rotor 3 has a stable magnetic field. The changing rotating magnetic field interacts with the stable magnetic field of the magnet to form an electromagnetic torque that drives the motor rotor 3 to rotate relative to the motor stator 1. The motor shaft 5 rotates synchronously and coaxially with the motor rotor 3.

[0029] Please see Figure 3 , Figure 3 for Figure 1 The diagram shows a three-dimensional structural schematic of the motor from another perspective. The motor stator 1 also includes a locking member 17, which is a circular plate-shaped structure. The inner diameter of the locking member 17 is larger than the inner diameter of the bearing assembly 13. The second end 53 of the motor shaft 5 and the locking member 17 are both provided with several threaded holes. After the second end 53 is inserted into the hollow tube structure 111, it is locked by the locking member 17 with bolts, so that the motor shaft 5 cannot be withdrawn from the hollow tube structure 111 along the same path.

[0030] Please refer to the following: Figure 2 and Figure 4 ,in Figure 4 for Figure 1 The diagram shows a three-dimensional structure of the motor cover. The motor cover 33 includes a rotor cover 333 and a heat sink cover 331 fixedly connected, both of which are disc-shaped. In this embodiment, the heat sink cover 331 and the rotor cover 333 may have multiple threaded holes corresponding to each other, and are fixedly connected by bolts; in other embodiments, they can also be fixedly connected by welding or other methods. The heat sink cover 331 is made of a lightweight material with excellent thermal conductivity, such as aluminum alloy or carbon nanotube fiber. The rotor cover 333 is made of a high-strength and high-rigidity material, such as cast iron or steel.

[0031] The heat dissipation cover 331 includes a main body 3311, a flow guide 3313, and a plurality of heat dissipation components 3315. The diameter of the main body 3311 matches the diameter of the rotor cover 333, and the two are fixedly connected. The heat dissipation components 3315 are located on the side of the main body 3311 near the rotor cover 333 and are arranged around the central axis of the main body 3311. Specifically, in this embodiment, the heat dissipation components 3315 are radially distributed around the central axis of the main body 3311. The flow guide is located on the outer edge of the main body 3311 and extends outward at an angle relative to the main body 3311.

[0032] Please refer to the following: Figure 4 and Figure 5 ,in Figure 5 for Figure 4 The diagram shows a cross-sectional view of the heat dissipation cover. The main body 3311 includes a central portion 33111, a connecting portion 33113, and an edge portion 33115. The central portion 33111 and the edge portion 33115 are located on different planes. The connecting portion 33113 connects the central portion 33111 and the edge portion 33115 to give the main body 3311 a continuous surface, thus sealing the motor 100 and providing rain and dust protection. The air guide 3313 is located on the outer edge of the edge portion 33115 and extends outward at an angle relative to the main body 3311 to extend the heat dissipation path of the hot airflow and prevent the airflow from accumulating at the edge of the motor cover, thus avoiding poor ventilation.

[0033] The heat sink 3315 has a dorsal fin-like structure and extends radially from the main body 3311 to the air guide 3313. The volume of the heat sink 3315 near the center 33111 is larger than the volume of the end near the air guide 3313. This design has the advantage that, for the uniformly dense heat sink 331, the distribution of mass in the center being greater than that in the outer edges is a low-inertia distribution, resulting in a smaller moment of inertia. This means that the motor rotor 3 can accelerate or decelerate more easily during rotation, improving the response speed of the motor 100. Furthermore, the larger volume at the center 33111 of the heat sink means a larger surface area, allowing for better contact with the hot airflow and enhancing heat dissipation. Simultaneously, due to the different volumes at different parts of the heat sink 3315, the curvature of its surface varies. According to Bernoulli's principle and the boundary layer effect, the hot airflow will accelerate along the length of the heat sink 3315, further improving heat dissipation efficiency. It is understandable that the longer the heat sink 3315 is, the longer the streamline, the more obvious the effect of accelerating airflow.

[0034] Please refer to the following: Figure 2 and Figure 4The rotor cover 333 includes a central body 3331, an edge body 3333, and several ribs 3335 that fix the central body 3331 and the edge body 3333. The central portion 33111 is provided corresponding to the central body 3331, and the edge portion 33115 is provided corresponding to the edge body 3333. When the rotor cover 333 is fixedly connected to the heat dissipation cover 331, the edge portion 33115, the main body 3311, and the heat dissipation component 3315 cooperate to form an exhaust port 335. Hot airflow is accelerated and discharged from the exhaust port 335 through the guiding effect of the heat dissipation component 3315, thereby increasing the heat convection rate between the inside of the motor 100 and the outside. In this embodiment, the main body 3311 and the rotor cover 333 may be provided with multiple threaded holes and fixedly connected by bolts; in other embodiments, they may also be fixedly connected by welding or other methods.

[0035] The advantage of the separate design of the heat dissipation cover 331 and the rotor cover 333 is that the heat dissipation cover 331 can be made of lightweight material to reduce the overall weight of the motor cover 33 and reduce the energy consumption of the motor rotor 3. The central body 3331 and the edge body 3333 of the rotor cover 333 are fixedly connected by the ribs 3335, further reducing the overall weight of the motor cover 33.

[0036] It should be noted that, in order to further improve the structural stability of the motor cover 33, the heat dissipation cover 331 also includes several claws 3317. The claws 3317 are located on the side of the main body 3311 near the rotor cover 333, corresponding to the ribs 3335, and the claws 3317 hold and fix the ribs 3335. The claws 3317 and the ribs 3335 have a surface contact connection, which can effectively disperse the tangential stress of the motor rotor 3 at high speeds and prevent the point contact connection (such as bolts or welds) between the heat dissipation cover 331 and the rotor cover 333 from failing due to centrifugal force at high speeds.

[0037] Please refer to the following: Figure 1 , Figure 2 and Figure 4 The rotor cover 333 has a boss 33311 in its central body 3331, and a through hole 331111 corresponding to the boss 33311. The boss 33311 protrudes from the heat sink cover 331 through the through hole 331111. The boss 33311 has a through hole 33313, and the center lines of the through hole 33313, the boss 33311, and the through hole 331111 are aligned.

[0038] The first end of the motor shaft 5 protrudes from the motor cover 33 through the through hole 33313. In this embodiment, the motor shaft 5 is bonded and fixed to the inner wall of the through hole 33313 with an adhesive, so that the motor shaft 5 and the motor cover 33 rotate synchronously and coaxially. In other embodiments, the boss 33311 may also be provided with a threaded hole, and the motor shaft 5 is fixed to the motor cover 33 by bolt locking.

[0039] Compared with motor covers in related technologies, the motor cover provided by this utility model has a separate design for the heat dissipation cover and the rotor cover, which optimizes the mass distribution of the motor cover, reduces the weight of the motor cover, and reduces the energy consumption of the motor; the heat dissipation cover is provided with a guide component, which extends the heat dissipation path of the hot airflow and extends the air outlet; the heat dissipation cover is also provided with a heat dissipation component, which guides the hot airflow to accelerate along the heat dissipation component and improves the heat dissipation efficiency.

[0040] The above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A motor cover, characterized in that, include: Rotor cover; and The heat sink includes: The main body is fitted with the rotor cover and the two are fixedly connected. Multiple heat sinks are provided on the side of the main body near the rotor cover and arranged around the central axis of the main body; and A flow guide is provided on the outer edge of the main body and extends outward at an angle relative to the main body.

2. The motor cover according to claim 1, characterized in that, The main body includes a central portion, an edge portion, and a connecting portion. The central portion and the edge portion are located on different planes, and the connecting portion connects the central portion and the edge portion to give the main body a continuous surface.

3. The motor cover according to claim 2, characterized in that, The rotor cover includes a central body, an edge body, and several ribs that are fixedly connected to the central body and the edge body. The central body is provided corresponding to the central part, and the edge body is provided corresponding to the edge part.

4. The motor cover according to claim 3, characterized in that, The heat sink extends radially from the main body to the flow guide, and the volume of the heat sink near the center is greater than the volume of the heat sink near the flow guide.

5. The motor cover according to claim 3, characterized in that, The heat dissipation cover also includes several claws, which are located on the side of the main body near the rotor cover, corresponding to the ribs, and the claws hold and fix the ribs.

6. The motor cover according to claim 3, characterized in that, The central body is provided with a boss, and the central part is provided with a through hole corresponding to the boss; the boss is provided with a through hole, and the center lines of the through hole, the boss and the through hole are aligned.

7. A motor rotor, characterized in that, It includes a rotor sidewall, a motor cover as described in any one of claims 1-6, and a plurality of magnets, wherein the rotor sidewall is fixedly connected to the motor cover; the plurality of magnets are arranged in a ring on the inner side of the sidewall.

8. The motor rotor according to claim 7, characterized in that, The motor rotor also includes rotor teeth, which are disposed on the motor cover and abut against the rotor sidewall. The rotor sidewall and the rotor teeth cooperate to form a mounting groove for mounting the magnet.

9. An electric motor, characterized in that, include: Motor stator; The motor rotor as described in claim 7, wherein the motor stator is energized to generate a magnetic field to drive the motor rotor to rotate; and The motor shaft is fixed to the motor rotor and rotates synchronously and coaxially with the motor rotor.

10. The motor according to claim 9, characterized in that, The motor stator includes a stator base with a hollow tube structure, a bearing assembly, and a stator winding. The stator winding is fixed to the stator base. The motor shaft is inserted into the hollow tube structure and is movably connected to the stator base through the bearing assembly.

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