Rotor component of brushless motor of automobile fan

Abstract

The utility model discloses a brushless motor rotor component of an automobile fan, which belongs to the technical field of automobile cooling fans and comprises a rotor body and a rotating shaft, the rotor body is sleeved on the rotating shaft, a plurality of circumferentially distributed vent holes are arranged on the end face of the rotor body in a penetrating manner, and a plurality of circumferentially distributed radiating fins are connected to the peripheral side of the rotor body. A plurality of uniformly distributed heat dissipation holes A are formed in the upper end of each heat dissipation fin, a plurality of uniformly distributed heat dissipation holes B are formed in the positions, corresponding to the heat dissipation fins, of the peripheral side of the rotor body, the heat dissipation holes A are communicated with the ventilation holes, and the heat dissipation holes B are communicated with the heat dissipation holes A. According to the utility model, through the arrangement of the ventilation holes, the heat dissipation holes and the heat dissipation fins, the air circulation efficiency is improved, and the working temperature of the motor is reduced, so that the stable operation of the motor is ensured, the working reliability of the automobile fan is improved, the heat dissipation performance of the motor is remarkably enhanced, and the service life of the motor is effectively prolonged; and faults and damages caused by overheating are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile cooling fans, in particular to a brushless motor rotor component for an automobile fan. Background Art

[0002] The motors commonly used in mechatronic products are divided into brushed DC motors and brushless DC motors. Brushless DC motors are widely used due to their advantages such as no brushes, low interference, low noise, smooth operation, long life and low maintenance cost. They are mostly used in equipment with high control requirements and high speed, such as model aircraft and precision instruments and meters.

[0003] For example, the utility model patent with announcement number CN209344887U discloses a brushless motor rotor, including a rotating shaft and a rotor assembly, the rotor assembly including a rotor core and a plurality of magnet blocks, the rotor core is sleeved on the rotating shaft, the side of the rotor core is evenly arranged with a plurality of embedding grooves for installing the magnet blocks along the circumferential direction, and the front and rear sides of the rotor core are arranged with rotor covers to prevent the magnet blocks from falling out of the embedding grooves. In the utility model, the embedding grooves that can hold the magnet blocks and the rotor covers that abut the ends of the magnet blocks are designed on the side of the rotor core to prevent the magnet blocks from falling off from the side of the rotor core. The utility model has a reasonable structure, effectively prevents the magnet blocks from falling off, and can be widely used in the field of motor technology, but there is a problem that the rotor components are insufficient in heat dissipation, which will cause a large amount of friction heat to appear in the rotor components during rotation, thereby affecting the performance of the rotor components. For this reason, we propose a brushless motor rotor component for automobile fans. Utility Model Content

[0004] The utility model aims to provide a brushless motor rotor component for an automobile fan to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a rotor component of a brushless motor for an automobile fan, comprising a rotor body and a rotating shaft, the rotor body being sleeved on the rotating shaft, a plurality of circumferentially distributed ventilation holes being penetrated through the end surface of the rotor body, a plurality of circumferentially distributed heat dissipation fins being connected to the outer peripheral side of the rotor body, a plurality of evenly distributed heat dissipation holes A being opened on the upper end of each of the heat dissipation fins, a plurality of evenly distributed heat dissipation holes B being opened at the positions of the heat dissipation fins on the outer peripheral side of the rotor body, the heat dissipation holes A being connected to the ventilation holes, the heat dissipation holes B being connected to the heat dissipation holes A, a plurality of circumferentially distributed dovetail grooves being opened on the outer peripheral side of the rotor body, each of the dovetail grooves being arranged between two adjacent heat dissipation fins, a magnetic steel assembly being arranged in each of the dovetail grooves, a plurality of circumferentially distributed positioning posts being connected to one end of the rotor body, and a blocking assembly being arranged on each of the positioning posts.

[0006] Preferably, each of the magnet assemblies includes a dovetail block slidably connected in the dovetail groove, and a magnet body is connected to the outer end of each dovetail block.

[0007] Preferably, the blocking assembly includes a blocking plate, on the surface of which there are a positioning hole and a jack. The positioning hole is arranged below the jack. The blocking plate is inserted on the positioning post through the positioning hole, and a rivet is riveted in the jack, and the rivet is riveted to the rotor body.

[0008] Preferably, the size of the dovetail block is matched with the size of the dovetail groove.

[0009] Preferably, one end of the blocking plate close to the rotor body abuts against the magnet body.

[0010] Preferably, two bearing bodies are installed on the rotating shaft, the rotor body is located between the two bearing bodies, and the rotating shaft positions the bearing bodies through bearing retaining rings.

[0011] Preferably, the magnet body has an arc surface, and the top of the arc surface protrudes from the side surface of the rotor body.

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

[0013] By setting the ventilation holes, heat dissipation holes and heat dissipation fins, the present utility model realizes the improvement of the air circulation efficiency, reduces the temperature during the operation of the motor, thereby ensuring the stable operation of the motor, enhancing the working reliability of the automotive fan, significantly enhancing the heat dissipation performance of the motor, effectively extending the service life of the motor, and reducing the failures and damages caused by overheating. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0015] Figure 2 is a schematic diagram of the structure of the rotor body of the present utility model;

[0016] Figure 3 is a schematic diagram of the structure of the magnet assembly of the present utility model;

[0017] Figure 4 is a schematic diagram of the structure of the blocking assembly of the present utility model.

[0018] In the figure: 1, rotor body; 2, ventilation hole; 3, rotating shaft; 4, bearing body; 5, bearing retaining ring; 6, positioning post; 7, dovetail groove; 8, magnet assembly; 801, dovetail block; 802, magnet body; 9, blocking assembly; 901, blocking plate; 902, positioning hole; 903, jack; 904, rivet; 10, heat dissipation fin; 11, heat dissipation hole A; 12, heat dissipation hole B. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] Next, in combination with the accompanying drawings in the embodiments of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0020] Please refer to Figures 1-4 , the present invention provides a technical solution: a brushless motor rotor component for an automotive fan, including a rotor body 1 and a rotating shaft 3. The rotor body 1 is sleeved on the rotating shaft 3. A plurality of ventilation holes 2 distributed in a circumferential manner are formed through the end face of the rotor body 1. A plurality of heat dissipation fins 10 distributed in a circumferential manner are connected to the outer peripheral side of the rotor body 1. A plurality of uniformly distributed heat dissipation holes A11 are formed at the upper end of each heat dissipation fin 10. A plurality of uniformly distributed heat dissipation holes B12 are formed at the position corresponding to the heat dissipation fins 10 on the outer peripheral side of the rotor body 1. The heat dissipation holes A11 communicate with the ventilation holes 2, and the heat dissipation holes B12 communicate with the heat dissipation holes A11. A plurality of circumferentially distributed dovetail grooves 7 are formed on the outer peripheral side of the rotor body 1. Each dovetail groove 7 is arranged between two adjacent heat dissipation fins 10. A magnetic steel assembly 8 is arranged in each dovetail groove 7. One end of the rotor body 1 is connected with a plurality of circumferentially distributed positioning columns 6, and a blocking assembly 9 is arranged on each positioning column 6.

[0021] In this embodiment, each magnetic steel assembly 8 includes a dovetail block 801 slidably connected in the dovetail groove 7, and a magnetic steel body 802 is connected to the outer end of each dovetail block 801.

[0022] Specifically, the insertion action of the magnetic steel body 802 can be completed through the magnetic steel assembly 8, which is convenient for the maintenance of the magnetic steel body 802.

[0023] In this embodiment, the blocking assembly 9 includes a blocking plate 901. The surface of the blocking plate 901 is provided with a positioning hole 902 and a jack 903. The positioning hole 902 is arranged below the jack 903. The blocking plate 901 is inserted on the positioning column 6 through the positioning hole 902, and a rivet 904 is riveted to the jack 903, and the rivet 904 is riveted to the rotor body 1.

[0024] Specifically, the stable positioning action of the magnetic steel body 802 can be realized through the blocking assembly 9.

[0025] In this embodiment, the size of the dovetail block 801 is matched with the size of the dovetail groove 7.

[0026] Specifically, it is ensured that the dovetail block 801 will not displace or shake in the dovetail groove 7.

[0027] In this embodiment, one end of the blocking plate 901 close to the rotor body 1 abuts against the magnetic steel body 802 .

[0028] Specifically, ensure that the blocking plate 901 is stably pressed against the magnetic steel body 802 .

[0029] In this embodiment, two bearing bodies 4 are installed on the rotating shaft 3 , the rotor body 1 is located between the two bearing bodies 4 , and the rotating shaft 3 is positioned in position by a bearing retaining ring 5 .

[0030] Specifically, the rotating shaft 3 can be stably positioned by the bearing body 4 and the bearing retaining ring 5 .

[0031] In this embodiment, the magnetic steel body 802 has an arc-shaped surface, and the top of the arc-shaped surface protrudes from the side surface of the rotor body 1 .

[0032] Working principle: When the motor is powered on and starts working, the current passes through the stator to generate a rotating magnetic field, and the rotor body 1 mounted on the shaft 3 starts to rotate under the action of the magnetic field. During the rotation process, the multiple heat dissipation fins 10 on the outer peripheral side of the rotor body 1 increase the contact area with the air and promote heat dissipation. At the same time, the multiple ventilation holes 2 opened through the end surface and the heat dissipation holes A11 and B12 opened on the outer peripheral side form a good ventilation channel, allowing air to circulate inside the rotor and take away heat. The magnetic steel assembly 8 in the dovetail slot 7 generates a stable magnetic field during rotation, which interacts with the stator magnetic field to drive the rotor to rotate continuously, and the resistance on the positioning column 6 The retaining assembly 9 effectively limits the displacement of the magnetic steel assembly 8 and ensures the stable distribution of the magnetic field. The two bearing bodies 4 installed on the rotating shaft 3 can reduce the friction resistance during rotation and make the rotor rotate more smoothly. The bearing retaining ring 5 positions the bearing body 4, further ensuring the stable operation of the rotating shaft 3 and the rotor body 1. The utility model realizes the setting of ventilation holes 2, heat dissipation holes and heat dissipation fins 10, which improves the air circulation efficiency and reduces the temperature of the motor during operation, thereby ensuring the stable operation of the motor, improving the working reliability of the automobile fan, significantly enhancing the heat dissipation performance of the motor, effectively extending the service life of the motor, and reducing failures and damages caused by overheating.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. The brushless motor rotor component of an automotive fan, comprising a rotor body (1) and a rotating shaft (3), is characterized in that: The rotor body (1) is sleeved on the rotating shaft (3). A plurality of ventilation holes (2) distributed in a circular pattern are formed through the end face of the rotor body (1). A plurality of heat dissipation fins (10) distributed in a circular pattern are connected to the outer peripheral side of the rotor body (1). A plurality of uniformly distributed heat dissipation holes A (11) are formed at the upper end of each heat dissipation fin (10). A plurality of uniformly distributed heat dissipation holes B (12) are formed at the position of the outer peripheral side of the rotor body (1) corresponding to the heat dissipation fins (10). The heat dissipation holes A (11) communicate with the ventilation holes (2), and the heat dissipation holes B (12) communicate with the heat dissipation holes A (11). A plurality of dovetail grooves (7) distributed in a circular pattern are formed on the outer peripheral side of the rotor body (1). Each dovetail groove (7) is arranged between two adjacent heat dissipation fins (10). A magnetic steel assembly (8) is arranged in each dovetail groove (7). A plurality of positioning columns (6) distributed in a circular pattern are connected to one end of the rotor body (1). A blocking assembly (9) is arranged on each positioning column (6).

2. The rotor component of the brushless motor of the automotive fan according to claim 1, wherein: Each magnetic steel assembly (8) includes a dovetail block (801) slidably connected in the dovetail groove (7). A magnetic steel body (802) is connected to the outer end of each dovetail block (801).

3. The rotor component of the brushless motor for an automotive fan according to claim 1, wherein: The blocking assembly (9) includes a blocking plate (901). A positioning hole (902) and a jack (903) are formed on the surface of the blocking plate (901). The positioning hole (902) is arranged below the jack (903). The blocking plate (901) is inserted on the positioning column (6) through the positioning hole (902). A rivet (904) is riveted to the jack (903), and the rivet (904) is riveted to the rotor body (1).

4. The rotor component of the brushless motor for an automotive fan according to claim 2, wherein: The size of the dovetail block (801) is matched with the size of the dovetail groove (7).

5. The rotor component of the brushless motor of the automotive fan according to claim 3, wherein: One end of the blocking plate (901) close to the rotor body (1) abuts against the magnetic steel body (802).

6. The rotor component of the brushless motor for an automotive fan according to claim 1, wherein: Two bearing bodies (4) are installed on the rotating shaft (3). The rotor body (1) is located between the two bearing bodies (4). The rotating shaft (3) positions the bearing bodies (4) through bearing retaining rings (5).

7. The rotor component of the brushless motor for an automotive fan according to claim 2, wherein: The magnetic steel body (802) has an arc surface, and the top of the arc surface protrudes from the side surface of the rotor body (1).

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