Fan cover and motor

Abstract

The utility model relates to the technical field of motors, and discloses a fan cover and a motor, the fan cover comprises a first cylinder part, a second cylinder part and a hollow circular truncated cone part which are integrally formed in sequence from front to back, and the diameter of the front circular edge of the hollow circular truncated cone part is larger than that of the rear circular edge. The end face of the hollow circular truncated cone part is the rear end face of the fan cover and is densely provided with a plurality of heat dissipation holes, and the output end of each heat dissipation hole is connected with an exhaust nozzle. A plurality of heat dissipation holes are densely distributed in the rear end face of the fan cover, and the output end of each heat dissipation hole is connected with an exhaust nozzle. When hot air reaches the exhaust nozzle through the heat dissipation holes, the exhaust speed of the hot air can be increased through the specific shape and structure of the exhaust nozzle. A certain negative pressure area can be formed near the heat dissipation holes at a high discharge speed, and according to the Bernoulli principle, internal hot air can be promoted to flow to the heat dissipation holes more quickly, so that the circular flow speed of the air is increased, the heat exchange and dissipation efficiency is enhanced, and heat dissipation of the motor is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a fan cover and a motor. Background Art

[0002] Some motors have a hood at the rear that has the following functions: 1. When the motor is running, the cooling fan at the rear rotates at high speed. The hood prevents people from accidentally touching the rotating fan blades, preventing fingers or other objects from being caught in the cooling fan and causing personal injury. 2. When the motor is working, heat is generated, which requires good ventilation to dissipate. The hood works in conjunction with the motor's fan to guide the cooling air in a specific direction, ensuring that the air can effectively flow through the motor's cooling fan to remove the heat. As the requirements for motor performance continue to increase, it is necessary to optimize the design of the hood to improve the heat dissipation effect of the motor.

[0003] It can be seen that the existing technology still needs to be improved and enhanced. Utility Model Content

[0004] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a fan cover and a motor, aiming to improve the heat dissipation performance of the fan cover and the motor.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A wind hood includes a first cylindrical portion, a second cylindrical portion, and a hollow frustum portion, which are integrally formed in sequence from front to back. The diameter of the front circular edge of the hollow frustum portion is larger than the diameter of the rear circular edge. The end face of the hollow frustum portion is the rear end face of the wind hood and is densely covered with multiple heat dissipation holes. The output end of each heat dissipation hole is connected to an exhaust nozzle.

[0007] As a further improvement of the above technical solution, the exhaust nozzle is in the shape of an outward-expanding trumpet.

[0008] As a further improvement of the above technical solution, the heat dissipation holes are arranged in a concentric circle array.

[0009] As a further improvement of the above technical solution, a mounting hole is provided on the first cylindrical portion.

[0010] The utility model also provides a motor, including a casing, a front end cover arranged at the front end of the casing, a rear end cover arranged at the rear end of the casing, a rotating shaft rotatably connected to the front end cover and the rear end cover, a rotor core arranged on the rotating shaft, and a stator core arranged between the rotor core and the casing, the rotor core is provided with a magnet, the stator core is provided with a stator winding, one end of the rotating shaft extends outward from the front end cover to form an output end, the other end of the rotating shaft extends outward from the rear end face to form a heat dissipation drive end and is sleeved with a heat dissipation fan, the above-mentioned wind cover surrounds the rear end cover and the heat dissipation fan, and the heat dissipation fan faces the heat dissipation holes on the wind cover.

[0011] As a further improvement of the above technical solution, heat dissipation fins are provided on the outer wall of the casing, and an air inlet is formed between the junction of the casing and the rear end cover and the first cylindrical portion of the wind hood.

[0012] As a further improvement of the above technical solution, the rotor core is provided with a plurality of tightening screws arranged in a circumferential array and axially passing through the rotor core, the front rotor pressure plate and the rear rotor pressure plate. The front end of the tightening screw is threadedly connected to a front tightening nut, and the rear end of the tightening screw is threadedly connected to a rear tightening nut; by tightening the front tightening nut and the rear tightening nut, the front rotor pressure plate and the rear rotor pressure plate jointly clamp the rotor core.

[0013] As a further improvement of the above technical solution, the front rotor pressure plate and the rear rotor pressure plate are both rotor pressure plates with fan blades.

[0014] As a further improvement of the above technical solution, the wind hood is fixed to the rear end cover by screws engaging with the mounting holes.

[0015] The beneficial effects of the present invention are as follows: Compared with the prior art, the rear end face of the fan hood provided by the present invention is densely covered with a plurality of heat dissipation holes, and the output end of each heat dissipation hole is connected to an exhaust nozzle. When hot air passes through the heat dissipation holes and reaches the exhaust nozzle, the specific shape and structure of the exhaust nozzle can accelerate the exhaust speed of the hot air. A faster exhaust speed can form a certain negative pressure area near the heat dissipation holes. According to Bernoulli's principle, this will cause the hotter air inside to flow to the heat dissipation holes more quickly, thereby accelerating the circulation speed of the air, enhancing the heat exchange and dissipation efficiency, and facilitating the heat dissipation of the motor. The motor provided by the present invention has all the beneficial effects of the fan hood. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Three-dimensional windshield Figure 1 .

[0017] Figure 2 Three-dimensional windshield Figure 2 .

[0018] Figure 3A three-dimensional diagram of the motor.

[0019] Figure 4 A cross-sectional view of the motor.

[0020] Explanation of the main component symbols: 1-wind cover, 11-first cylindrical part, 12-second cylindrical part, 13-hollow conical part, 14-heat dissipation hole, 15-exhaust nozzle, 16-mounting hole, 21-casing, 22-front cover, 23-rear cover, 24-rotating shaft, 25-rotor core, 26-stator core, 27-cooling fan, 28-heat dissipation fins, 291-front rotor pressure plate, 292-rear rotor pressure plate, 20-air inlet. DETAILED DESCRIPTION

[0021] The present invention provides a fan cover 1 and a motor. To make the purpose, technical solution and effect of the present invention clearer and more specific, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific examples described here are only used to explain the present invention and are not intended to limit the scope of protection of the present invention.

[0022] See also Figure 1 and Figure 2 The utility model provides a wind cover 1, including a first cylindrical portion 11, a second cylindrical portion 12, and a hollow frustum portion 13, which are integrally formed from front to back. The overall structure is stable and can fully cover the tail of the motor. It can reliably prevent people from accidentally contacting the high-speed rotating cooling fan 27 blades, greatly reducing the risk of fingers or other objects being caught in the cooling fan 27, thereby effectively avoiding the occurrence of personal injury accidents and providing a safer working environment for operators.

[0023] The diameter of the front circular edge of the hollow frustum 13 is larger than the diameter of the rear circular edge. The special shape design of the hollow frustum 13, with the front circular edge having a larger diameter than the rear circular edge, can more effectively guide the cooling air to flow in a specific, gradually contracting direction when used in conjunction with the motor fan. This shape increases the flow rate of air as it flows through the hood 1, thereby enhancing the air's flushing effect on the motor and ensuring that the air can flow more effectively through the motor's cooling fan 27, improving heat exchange efficiency and more efficiently removing the heat generated by the motor during operation, significantly enhancing the motor's heat dissipation.

[0024] The end face of the hollow conical portion 13 forms the rear end of the hood 1 and is densely covered with a plurality of heat dissipation holes 14. Each heat dissipation hole 14 is connected to an exhaust nozzle 15 at its output end. Specifically, exhaust nozzle 15 is provided on the back of the hollow conical portion 13. When hot air passes through heat dissipation holes 14 and reaches exhaust nozzle 15, the specific shape and structure of exhaust nozzle 15 accelerates the exhaust of the hot air. This faster exhaust speed creates a certain negative pressure area near the heat dissipation holes 14. According to Bernoulli's principle, this causes the hotter air inside to flow toward the heat dissipation holes 14 more quickly, thereby accelerating the air circulation rate, enhancing the efficiency of heat exchange and dissipation, and facilitating heat dissipation in the motor.

[0025] The air flow inside the motor is complex, and the rotation of the cooling fan 27 causes airflow in different directions. The exhaust nozzle 15 can rectify the air flowing out of the cooling holes 14, allowing it to exit the hood 1 in a relatively stable state. This helps reduce turbulence in the air inside and around the hood 1. Reduced turbulence means less energy loss in the air flow, allowing the heat generated by the motor to be more effectively removed from the hood 1, further improving the heat dissipation effect.

[0026] Specifically, the exhaust nozzle 15 is in the shape of a trumpet that expands outward. The trumpet-shaped exhaust nozzle 15 increases the heat dissipation area of ​​the air hood 1. Its outward-expanding portion can diffuse the hot air discharged from the heat dissipation hole 14 to a larger range, so that the heat can be dissipated to the surrounding environment more quickly. Compared with the traditional straight-cylinder or other shaped exhaust nozzles 15, the trumpet-shaped design can exchange heat with more external air, thereby improving the heat dissipation efficiency. At the same time, this expanded heat dissipation range also helps to reduce the air temperature around the air hood 1, further improve the heat dissipation conditions of the motor, and reduce the adverse effects of heat accumulation on the motor performance.

[0027] After being discharged from heat dissipation holes 14, hot air is rapidly dispersed through trumpet-shaped exhaust nozzles 15. This rapid diffusion prevents the hot air from forming a localized high-temperature zone at the outlet of the hood 1, reducing the heat radiation effect of the hot air on other components around the motor. The rapidly diffusing hot air mixes more quickly with the cooler surrounding air, accelerating the transfer and dissipation of heat, thereby effectively reducing the overall temperature of the motor and improving its reliability and service life. This heat dissipation advantage is particularly evident during long-term high-load operation.

[0028] Preferably, the heat dissipation holes 14 are arranged in a concentric array. This arrangement coordinates well with the shape of the fan hood 1 and the fan's airflow. When the fan rotates, air flows through the fan hood 1 and through the heat dissipation holes 14. This arrangement allows air to enter the heat dissipation holes 14 evenly at different radial positions within the fan hood 1, ensuring a more uniform air flow distribution within the fan hood 1. This uniform air flow more effectively removes heat, improving heat dissipation efficiency and making the entire heat dissipation process smoother, avoiding localized heat dissipation problems or hot spots caused by uneven air flow.

[0029] Preferably, a mounting hole 16 is provided on the first cylindrical portion 11. By using the mounting hole 16 for fixed connection, the fan hood 1 can be more firmly mounted on the motor. The motor will vibrate during operation. If the fan hood 1 is not firmly installed, it may become loose or displaced, affecting its protection and heat dissipation functions. By cooperating with suitable fastening parts through the mounting hole 16, sufficient connection strength can be provided to resist vibration and other external forces during motor operation, ensuring that the fan hood 1 always maintains a stable position and state during long-term operation, and providing reliable protection for the safe operation and heat dissipation of the motor.

[0030] See Figure 3 and Figure 4 The present invention also provides a motor, including a casing 21, a front end cover 22 arranged at the front end of the casing 21, a rear end cover 23 arranged at the rear end of the casing 21, a rotating shaft 24 rotatably connected to the front end cover 22 and the rear end cover 23, a rotor core 25 arranged on the rotating shaft 24, and a stator core 26 arranged between the rotor core 25 and the casing 21, the rotor core 25 is provided with a magnetic steel, the stator core 26 is provided with a stator winding, one end of the rotating shaft 24 extends outward from the front end cover 22 to form an output end, the other end of the rotating shaft 24 extends outward from the rear end surface to form a heat dissipation drive end and is sleeved with a heat dissipation fan 27, the above-mentioned wind cover 1 surrounds the rear end cover 23 and the heat dissipation fan 27, and the heat dissipation fan 27 faces the heat dissipation holes 14 on the wind cover 1.

[0031] The hood 1 surrounds the rear end cover 23 and the cooling fan 27, and the cooling fan 27 faces the cooling holes 14 on the hood 1, forming a relatively closed and efficient cooling channel. When the motor is running, the heat generated by the rotor core 25 and the stator core 26 will be transferred to the casing 21 and the rear end cover 23. The cooling fan 27 rotates to promote air flow, and the cold air is sucked into the hood 1. After being accelerated by the cooling fan 27, it is blown directly to the cooling holes 14 on the hood 1. This design ensures that the heat generated by the motor during operation can be taken away in a timely and effective manner, maintaining the motor operating within an appropriate temperature range, thereby ensuring the performance stability and reliability of the motor and extending the service life of the motor. It avoids problems such as decreased motor efficiency, insulation aging, and even damage due to overheating.

[0032] Furthermore, the outer wall of the casing 21 is provided with heat dissipation fins 28. The heat dissipation fins 28 provided on the outer wall of the casing 21 significantly increase the contact area between the motor and the outside air. The heat generated when the motor is running can be transferred to the heat dissipation fins 28 through the casing 21. The surface area of ​​the heat dissipation fins 28 is relatively large, which can more effectively dissipate heat to the surrounding air. The junction of the casing 21 and the rear end cover 23 is the air hood 1 and the first cylindrical part 11 of the air hood 1 to form an air inlet 20. On the one hand, it accelerates the air flow at the heat dissipation fins 28, and on the other hand, it allows the external cold air to enter the interior of the air hood 1 more smoothly through the air inlet 20. When the cold air flows through the heat dissipation fins 28, it will take away the heat on the fins, further enhancing the heat dissipation effect. The cooperation between the air inlet 20 and the heat dissipation fins 28 forms a good air circulation channel, promotes heat exchange and dissipation, and improves the overall heat dissipation performance of the motor.

[0033] Specifically, the rotor core 25 is equipped with multiple tightening screws arranged in a circumferential array and axially extending through the rotor core 25, the front rotor pressure plate 291, and the rear rotor pressure plate 292. The front ends of these tightening screws are threadedly connected to front tightening nuts, while the rear ends of these tightening screws are threadedly connected to rear tightening nuts. Tightening these front and rear tightening nuts causes the front and rear rotor pressure plates 291 and 292 to jointly clamp the rotor core 25. This arrangement provides a uniform, all-round tightening force on the rotor core 25. When tightening the front and rear tightening nuts, the front and rear rotor pressure plates 291 and 292 apply uniform pressure from both ends toward the center, tightly clamping the rotor core 25. During the high-speed rotation of the motor, the rotor core 25 will be subjected to huge centrifugal force. This fastening method can ensure that the various parts of the rotor core 25 are tightly combined and will not become loose, deformed or displaced due to centrifugal force, thereby effectively maintaining the overall structural stability of the rotor and ensuring the reliability of the motor in long-term operation.

[0034] Furthermore, the front rotor pressure plate 291 and the rear rotor pressure plate 292 are both rotor pressure plates with fan blades. When the motor rotates, the blades of the rotor pressure plate with fan blades will rotate along with the rotor. The rotation of the fan blades can generate airflow and promote the flow of air inside the motor. When the motor is running, components such as the rotor core 25 and the stator core 26 will generate heat, and the airflow driven by these fan blades can better transfer the heat from the inside of the motor to the external environment. Compared with the traditional bladeless rotor pressure plate, this design greatly increases the circulation speed and flow rate of the air, improves the heat dissipation efficiency, helps to keep the motor running at a lower temperature, and extends the service life and reliability of the motor.

[0035] Furthermore, the fan cover 1 is secured to the rear end cover 23 via screws engaging mounting holes 16. The engagement of the screws with the mounting holes 16 provides a simple and effective connection method, securely securing the fan cover 1 to the rear end cover 23. The tightening action of the screws prevents the fan cover 1 from loosening or falling due to vibrations and various external forces generated during motor operation. This reliable securing method ensures that the fan cover 1 remains in the correct position, consistently performing its protective and heat dissipation functions.

[0036] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0037] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections, or mutual communication; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0038] It is understandable that those skilled in the art can make equivalent substitutions or changes based on the technical solution and the utility model concept of the present invention, and all these changes or substitutions should fall within the scope of protection of the present invention.

Claims

1. A wind hood, characterized in that: It includes a first cylindrical part, a second cylindrical part, and a hollow conical part that are integrally formed in sequence from front to back. The diameter of the front circular edge of the hollow conical part is larger than the diameter of the rear circular edge. The end face of the hollow conical part is the rear end face of the wind hood and is densely covered with multiple heat dissipation holes. The output end of each heat dissipation hole is connected to an exhaust nozzle.

2. The wind shield according to claim 1, characterized in that The exhaust nozzle is in an outwardly expanding trumpet shape.

3. The wind shield according to claim 1 or 2, characterized in that: The heat dissipation holes are arranged in a concentric circle array.

4. The wind shield according to claim 1, characterized in that The first cylindrical portion is provided with a mounting hole.

5. A motor comprising a housing, a front end cover disposed at the front end of the housing, a rear end cover disposed at the rear end of the housing, a rotating shaft rotatably connected to the front end cover and the rear end cover, a rotor core disposed on the rotating shaft, and a stator core disposed between the rotor core and the housing, wherein the rotor core is provided with magnets, and the stator core is provided with stator windings, characterized in that: One end of the rotating shaft extends outward from the front end cover to form an output end, and the other end of the rotating shaft extends outward from the rear end face to form a heat dissipation drive end and is provided with a heat dissipation fan. The wind cover according to any one of claims 1 to 4 surrounds the rear end cover and the heat dissipation fan, and the heat dissipation fan faces the heat dissipation holes on the wind cover.

6. The motor according to claim 5, characterized in that The outer wall of the casing is provided with heat dissipation fins, and the junction of the casing and the rear end cover is the air hood and forms an air inlet between the first cylindrical part of the air hood.

7. The motor according to claim 5, characterized in that The rotor core is provided with a plurality of tightening screws arranged in a circumferential array and axially passing through the rotor core, the front rotor pressure plate and the rear rotor pressure plate. The front end of the tightening screw is threadedly connected to the front tightening nut, and the rear end of the tightening screw is threadedly connected to the rear tightening nut; by tightening the front tightening nut and the rear tightening nut, the front rotor pressure plate and the rear rotor pressure plate jointly clamp the rotor core.

8. The motor according to claim 7, characterized in that The front rotor pressure plate and the rear rotor pressure plate are both rotor pressure plates with fan blades.

9. The motor according to claim 5, characterized in that The wind shield is fixed on the rear end cover by screws and mounting holes.

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