A brushless motor

Abstract

This utility model discloses a brushless motor, including a housing, a rotor winding, a stator winding, a first balance block, a second balance block, a motor shaft, and several fan blades. The rotor winding is disposed inside the housing. The stator winding is disposed on the inner side wall of the housing and surrounds the rotor winding, and the stator winding can be connected to an external driver. The first balance block and the second balance block are respectively disposed on both sides of the rotor winding. The fan blades are integrally formed with the first balance block or the second balance block. The motor shaft passes through the first balance block, the rotor winding, and the second balance block. By integrally forming the fan blades and balance blocks through the above structure, the internal structure of the motor is greatly simplified while ensuring the stability of motor operation, which not only reduces production costs but also reduces assembly costs, thus meeting the usage requirements.

Description

Technical Field

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

[0002] Brushless motors, as a new type of motor combining electronic and electrical technologies, have been widely used in many fields such as industrial automation, new energy vehicles, smart homes, and aerospace due to their significant advantages such as high efficiency, high speed, long lifespan, and stable operation. While brushless motors offer the advantage of high speed, this also generates vibration and noise during operation. Furthermore, brushless motors produce a significant amount of heat during operation, affecting the smoothness, accuracy, and lifespan of the motor. Current solutions involve adding a balance weight and a cooling fan. However, since both the balance weight and the cooling fan need to be connected to the rotor windings, a separate cooling fan undoubtedly requires additional connection structures, occupying a large amount of space within the motor, increasing the complexity of the motor structure, and leading to higher costs. Therefore, there is an urgent need for a brushless motor to solve these problems. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a brushless motor.

[0004] The technical solution adopted by one embodiment of this utility model to solve its technical problem is: a brushless motor, including a housing, a rotor winding, a stator winding, a first balance block, a second balance block, a motor shaft, and a plurality of fan blades; The rotor windings are housed inside the casing; The stator windings are mounted on the inner wall of the housing and surround the rotor windings. The stator windings can be connected to an external drive. The first and second balance blocks are respectively installed on both sides of the rotor winding; The fan blades are integrally formed with the first or second balance block; The motor shaft passes through the first balance block, the rotor winding, and the second balance block.

[0005] As one of the preferred embodiments of this utility model, a plurality of first limiting posts are provided on the first balance block, and a plurality of first limiting slots are provided on one side of the rotor winding. The first limiting posts are inserted into the first limiting slots to restrict the relative rotation between the first balance block and the rotor winding.

[0006] As one of the preferred embodiments of this utility model, a plurality of second limiting posts are provided on the second balance block, and a plurality of second limiting slots are provided on the other side of the rotor winding. The second limiting posts are inserted into the second limiting slots to restrict the relative rotation between the second balance block and the rotor winding.

[0007] As one of the preferred embodiments of this utility model, the housing is provided with a first bearing and a second bearing arranged on both sides of the rotor winding. The outer rings of the first bearing and the second bearing are connected to the housing. One end of the motor shaft is connected to the inner ring of the first bearing, and the other end is connected to the inner ring of the second bearing.

[0008] As one of the preferred embodiments of this utility model, the rotor winding includes a rotor core and several magnets. The rotor core has several axially penetrating core slots arranged circumferentially, and the magnets are inserted into the core slots.

[0009] As one of the preferred embodiments of this utility model, the two ends of the iron core groove are respectively provided with a first slot and a second slot, and the first balance block and / or the second balance block are provided with a first post and a second post in pairs. The first post is inserted into the first slot and abuts against the magnet, and the second post is inserted into the second slot and abuts against the magnet.

[0010] The beneficial effects of this utility model are as follows: A brushless motor includes a housing, a rotor winding, a stator winding, a first balance block, a second balance block, a motor shaft, and several fan blades; the rotor winding is disposed inside the housing; the stator winding is disposed on the inner side wall of the housing and surrounds the circumference of the rotor winding, and the stator winding can be connected to an external driver; the first balance block and the second balance block are respectively disposed on both sides of the rotor winding; the fan blades are integrally formed with the first balance block or the second balance block; the motor shaft passes through the first balance block, the rotor winding, and the second balance block; by integrally forming the fan blades and the balance block through the above structure, the internal structure of the motor is greatly simplified while ensuring the stability of motor operation, which not only reduces production costs but also reduces assembly costs, thus meeting the usage requirements. Attached Figure Description

[0011] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of a brushless motor. Figure 2 This is a first exploded view of a brushless motor; Figure 3 This is a second exploded view of a brushless motor; Figure 4 This is a cross-sectional view of a brushless motor; Figure 5 Figure 2 A magnified view of a portion of region A in the middle. Detailed Implementation

[0012] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0013] In the description of this utility model, "multiple" means two or more; "greater than," "less than," and "exceeding" are understood to exclude the stated number; "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly specifying the number of indicated technical features or their sequential relationship.

[0014] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0015] In this utility model, unless otherwise explicitly defined, the terms "setting," "installing," and "connecting" should be interpreted broadly. For example, they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to a fixed connection, a detachable connection, or an integral molding; they can refer to a mechanical connection; they can refer to the internal connection of two components or the interaction between two components. Those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0016] Reference Figures 1-5 A brushless motor includes a housing 10, a rotor winding 20, a stator winding 30, a first balance block 51, a second balance block 52, a motor shaft 60, and several fan blades 40. The rotor winding 20 is disposed inside the housing 10; The stator winding 30 is mounted on the inner wall of the housing 10 and surrounds the circumference of the rotor winding 20. The stator winding 30 can be connected to an external drive. The first balancing block 51 and the second balancing block 52 are respectively installed on both sides of the rotor winding 20; The fan blade 40 is integrally formed with the first balance block 51 or the second balance block 52; The motor shaft 60 passes through the first balance block 51, the rotor winding 20, and the second balance block 52.

[0017] In this utility model, the fan blade 40 and the first balance block 51 are integrally formed as an example. Specifically, during assembly, the first balance block 51 and the second balance block 52 are fitted with the motor shaft 60 with a clearance. After the first balance block 51 and the second balance block 52 are connected to the rotor winding 20, the motor shaft 60 is pressed into the rotor winding 20. Preferably, the rotor winding 20 includes a rotor core 21 and a plurality of magnets 22. The rotor core 21 has a plurality of axially penetrating core slots 23 arranged circumferentially. The magnets 22 are inserted into the core slots 23. The first balance block 51 and the second balance block 52 are connected to the rotor core 21. The assembly is then placed into the housing 10, which is equipped with the stator winding 30. Preferably, the housing 10 includes a front bracket 11 and a rear bracket 12, which are connected by bolts 90 and together form a rotation space for the rotor winding 20 and the motor shaft 60 to rotate. The leads of the stator winding 30 are connected to an external driver, which will generate an alternating magnetic field to drive the rotor winding 20 and the motor shaft 60 to rotate. The first balance block 51 and the second balance block 52 will rotate together. Since the fan blade 40 is integrally formed on the first balance block 51, the fan blade 40 will also rotate together, thereby blowing the heat generated in the motor out of the housing 10.

[0018] Reference Figures 2-3 , Figure 5 In some embodiments, the first balance block 51 is provided with a plurality of first limiting posts 71, and one side of the rotor winding 20 is provided with a plurality of first limiting slots 72. The first limiting posts 71 are inserted into the first limiting slots 72 to restrict the relative rotation between the first balance block 51 and the rotor winding 20. In a further embodiment, the second balance block 52 is provided with a plurality of second limiting posts 73, and the other side of the rotor winding 20 is provided with a plurality of second limiting slots 74. The second limiting posts 73 are inserted into the second limiting slots 74 to restrict the relative rotation between the second balance block 52 and the rotor winding 20. The cooperation between the first limiting posts 71 and the first limiting slots 72 and the cooperation between the second limiting posts 73 and the second limiting slots 74 can ensure the coaxiality of the first balance block 51, the second balance block 52 and the rotor core 21, and prevent the fan blades 40, the first balance block 51 and the second balance block 52 from circumferentially sliding when the rotor winding 20 is running at high speed.

[0019] Reference Figures 2-5In some embodiments, the housing 10 is provided with a first bearing 81 and a second bearing 82 arranged on both sides of the rotor winding 20. The outer rings of the first bearing 81 and the second bearing 82 are connected to the housing 10. One end of the motor shaft 60 is connected to the inner ring of the first bearing 81, and the other end is connected to the inner ring of the second bearing 82. Specifically, the first bearing 81 is disposed on the front bracket 11, and the second bearing 82 is disposed on the rear bracket 12. In a further embodiment, a first pressure block 91 and a second pressure block 92 are also included. The front bracket 11, the rear bracket 12, and the first pressure block 91 are all connected. Both block 91 and the second pressure block 92 are made of plastic. After the first bearing 81 is placed into the corresponding slot on the front bracket 11, the first pressure block 91 is ultrasonically welded to the front bracket 11 and abuts against the outer ring of the first bearing 81. After the second bearing 82 is placed into the corresponding slot on the rear bracket 12, the second pressure block 92 is ultrasonically welded to the rear bracket 12 and abuts against the outer ring of the second bearing 82. This prevents the outer ring of the bearing from creeping against the housing 10 during long-term high-speed operation of the motor, which would accelerate wear, generate noise and vibration, and affect the lifespan of the motor and the overall user experience.

[0020] Reference Figures 2-3 , Figure 5 In some embodiments, the two ends of the iron core groove 23 are respectively provided with a first slot 24 and a second slot 25. The first balance block 51 and / or the second balance block 52 are provided with a first locking post 26 and a second locking post 27 in pairs. The first locking post 26 is inserted into the first slot 24 and abuts against the magnet 22, and the second locking post 27 is inserted into the second slot 25 and abuts against the magnet 22. During assembly, the magnet 22 is first placed into the iron core groove 23, and then the first locking post 26 and the second locking post 27 on the first balance block 51 are respectively inserted into the first slot 24 and the second slot 25 at both ends of the iron core groove 23, and / or the first locking post 26 and the second locking post 27 on the second balance block 52 are respectively inserted into the first slot 24 and the second slot 25 at both ends of the iron core groove 23, thereby fixing the magnet 22 in the iron core groove 23.

[0021] The advantages of this utility model are: by forming the fan blade and the balance block into one piece through the above structure, the internal structure of the motor is greatly simplified while ensuring the stability of motor operation, which not only reduces production costs but also reduces assembly costs and meets usage requirements.

[0022] Of course, this utility model is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of this utility model. All such equivalent modifications and substitutions are included within the scope defined by the claims of this application.

Claims

1. A brushless motor, characterized in that: It includes a housing (10), a rotor winding (20), a stator winding (30), a first balance block (51), a second balance block (52), a motor shaft (60), and several fan blades (40); The rotor winding (20) is disposed inside the housing (10); The stator winding (30) is installed on the inner wall of the housing (10) and surrounds the circumference of the rotor winding (20). The stator winding (30) can be connected to an external driver. The first balance block (51) and the second balance block (52) are respectively installed on both sides of the rotor winding (20); The fan blade (40) is integrally formed with the first balance block (51) or the second balance block (52); The motor shaft (60) passes through the first balance block (51), the rotor winding (20), and the second balance block (52).

2. A brushless motor according to claim 1, characterized in that: The first balance block (51) is provided with a plurality of first limiting posts (71), and the rotor winding (20) is provided with a plurality of first limiting slots (72) on one side. The first limiting posts (71) are inserted into the first limiting slots (72) to restrict the relative rotation between the first balance block (51) and the rotor winding (20).

3. A brushless motor according to claim 1, characterized in that: The second balance block (52) is provided with a plurality of second limiting posts (73), and the rotor winding (20) is provided with a plurality of second limiting slots (74) on the other side. The second limiting posts (73) are inserted into the second limiting slots (74) to restrict the relative rotation between the second balance block (52) and the rotor winding (20).

4. A brushless motor according to claim 1, characterized in that: The housing (10) is provided with a first bearing (81) and a second bearing (82) arranged on both sides of the rotor winding (20). The outer ring of the first bearing (81) and the outer ring of the second bearing (82) are connected to the housing (10). One end of the motor shaft (60) is connected to the inner ring of the first bearing (81) and the other end is connected to the inner ring of the second bearing (82).

5. A brushless motor according to claim 1, characterized in that: The rotor winding (20) includes a rotor core (21) and several magnets (22). The rotor core (21) has several axially penetrating core slots (23) arranged circumferentially, and the magnets (22) are inserted into the core slots (23).

6. A brushless motor according to claim 5, characterized in that: The iron core groove (23) is provided with a first slot (24) and a second slot (25) at both ends. The first balance block (51) and / or the second balance block (52) are provided with a first locking post (26) and a second locking post (27) in pairs. The first locking post (26) is inserted into the first slot (24) and abuts against the magnet (22). The second locking post (27) is inserted into the second slot (25) and abuts against the magnet (22).

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