CN221552928U

CN221552928U - Rotor of miniature permanent magnet motor

Info

Publication number: CN221552928U
Application number: CN202323525061.3U
Authority: CN
Inventors: 黄崇荣
Original assignee: Ningbo Tianling Electromechanical Co ltd
Current assignee: Ningbo Tianling Electromechanical Co ltd
Priority date: 2023-12-22
Filing date: 2023-12-22
Publication date: 2024-08-16
Anticipated expiration: 2033-12-22

Abstract

The utility model relates to the technical field of miniature permanent magnet motors, and discloses a rotor of a miniature permanent magnet motor, which comprises a rotating shaft, wherein a rotor core is fixedly connected to the surface of the rotating shaft, a permanent magnet hole is formed in the rotor core, a permanent magnet is fixedly connected to the inner wall of the permanent magnet hole, a bearing is fixedly connected to the surface of the rotating shaft, and an elliptic cylinder is fixedly connected to the right side of the rotating shaft. According to the utility model, the elliptic cylinder, the first cylinder, the elliptical hole, the circular stepped hole and the locking support are arranged, wherein when the first cylinder is sleeved on the elliptic cylinder and the elliptic plate on the locking support is staggered, the first cylinder can be fixed on the elliptic cylinder through the elliptic plate, and the distance between the elliptic plate and the rotating shaft is fixed, so that the first cylinder fixed on the elliptic cylinder cannot loosen, the fan shell on the rotor is fixed more firmly, and abnormal sound cannot be generated when the rotor rotates due to the loosening of the fan shell.

Description

Rotor of miniature permanent magnet motor

Technical Field

The utility model relates to the technical field of miniature permanent magnet motors, in particular to a rotor of a miniature permanent magnet motor.

Background

The permanent-magnet brushless DC motor is a DC motor with one or more permanent magnets for establishing magnetic field, and has similar performance to that of a separately excited DC motor with constant exciting current, and can be conveniently regulated by changing the armature voltage. Compared with other DC motors, the motor has the advantages of small volume, high efficiency, simple structure, less copper consumption and the like, and is a main type of a low-power DC motor.

At present, the rotor of the miniature permanent magnet motor mainly comprises a rotating shaft, a rotor iron core, a permanent magnet, a bearing, a fan shell and fan blades, wherein when the rotor rotates, wind power can be generated through rotation of the fan blades to dissipate heat of the rotor iron core, for example, the rotor of the built-in permanent magnet motor disclosed in Chinese patent publication No. CN217335350U is fixed between the fan shell and the rotating shaft through bolts, the bolts automatically rotate after being vibrated, and then the rotor is easily loosened after being vibrated, and abnormal noise is generated in the rotating process of the rotor.

Disclosure of utility model

The utility model aims to solve the defects existing in the prior art, such as: at present, the rotor of the miniature permanent magnet motor mainly comprises a rotating shaft, a rotor iron core, permanent magnets, bearings, a fan shell and fan blades, wherein when the rotor rotates, wind power can be generated through rotation of the fan blades to dissipate heat of the rotor iron core, but the fan shell and the rotating shaft are fixed through bolts, the bolts automatically rotate after being vibrated, the fan shell is easy to loosen after the rotor is vibrated, abnormal noise is generated in the rotating process of the rotor, and the rotor of the miniature permanent magnet motor is provided.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

The utility model provides a miniature permanent magnet motor's rotor, includes the pivot, the fixed surface of pivot is connected with rotor core, the permanent magnet hole has been seted up to rotor core's inside, the inner wall fixedly connected with permanent magnet in permanent magnet hole, the fixed surface of pivot is connected with the bearing, the right side fixedly connected with elliptic cylinder of pivot, the right side laminating of pivot is provided with first cylinder, the elliptical hole has been seted up to the inside of first cylinder, the inner wall and the surface contact of elliptic cylinder of elliptical hole, circular stepped hole has been seted up to the inside of elliptic cylinder, the inner wall fixedly connected with lock dead support of circular stepped hole, the right side of first cylinder and the right side of elliptic cylinder all contact with the left side of lock dead support, the surface fixedly connected with fan shell of first cylinder, the right side fixedly connected with fan blade of fan shell.

Preferably, the dead support of lock includes the limiting plate, the right side of limiting plate and the inner wall contact of circular shoulder hole, the equal fixedly connected with scroll spring of surface and the inner wall of circular shoulder hole of limiting plate, the right side fixedly connected with second cylinder of limiting plate, the right side fixedly connected with elliptic plate of second cylinder, the right side of first cylinder and the right side of elliptic cylinder all contact with the elliptic plate, the right side fixedly connected with regular octagon piece of elliptic plate.

Preferably, the center of the elliptic plate and the center of the elliptic cylinder are on the same horizontal line, and the cross section shape of the elliptic plate is the same as that of the elliptic cylinder.

Preferably, the sliding hole is formed in the right side of the elliptic cylinder, the positioning cylinder is arranged on the inner wall of the sliding hole in a fitting mode, the spiral springs are fixedly connected to the left side of the positioning cylinder and the right side of the rotating shaft, and the positioning hole is formed in the elliptic plate.

Preferably, the surface laminating of regular octagon piece is provided with the sliding ring, regular octagon piece's fixed surface is connected with the baffle ring, the sliding ring is located between baffle ring and the elliptic plate, the fixed surface of sliding ring is connected with presses the post, press the right side contact of post and reference column in the left side, press the surface of post and the inner wall contact of locating hole.

Preferably, the centers of the limiting plate, the second cylinder, the elliptic plate and the regular octagonal block are all on the same horizontal line.

Compared with the prior art, the utility model has the beneficial effects that:

(1) According to the utility model, the elliptic cylinder, the first cylinder, the elliptical hole, the circular stepped hole and the locking support are arranged, wherein when the first cylinder is sleeved on the elliptic cylinder and the elliptic plate on the locking support is staggered, the first cylinder can be fixed on the elliptic cylinder through the elliptic plate, and the distance between the elliptic plate and the rotating shaft is fixed, so that the first cylinder fixed on the elliptic cylinder cannot loosen, the fan shell on the rotor is fixed more firmly, and abnormal sound cannot be generated when the rotor rotates due to the loosening of the fan shell.

(2) According to the utility model, after the elliptic plate is aligned with the elliptic cylinder through the sliding hole, the positioning column, the spiral spring and the positioning hole, the elliptic plate can be automatically locked, so that maintenance personnel do not need to rotate the elliptic plate all the time when the first cylinder is taken down from the elliptic cylinder, thereby being convenient for the maintenance personnel to take down the first cylinder from the elliptic cylinder, and simultaneously, the positioning column can be moved out of the positioning hole or separated from the elliptic plate under the action of the pressing column by pushing the sliding ring leftwards, so that the maintenance personnel can more conveniently move the positioning column out of the positioning hole or separate the positioning column from the elliptic plate.

Drawings

FIG. 1 is a schematic illustration of the structure of the present utility model;

FIG. 2 is an enlarged view of FIG. 1 at A;

FIG. 3 is a side view of a rotor core of the present utility model;

FIG. 4 is a left side view of an elliptic cylinder of the present utility model;

FIG. 5 is a left side view of the first cylinder of the present utility model;

FIG. 6 is a front view of a lock-up bracket of the present utility model;

FIG. 7 is a left side view of the lock-up bracket of the present utility model;

FIG. 8 is a right side view of an elliptical plate of the present utility model;

fig. 9 is a right side view of the fan housing and fan blades of the present utility model.

In the figure: 1. a rotating shaft; 2. a rotor core; 3. a permanent magnet hole; 4. a permanent magnet; 5. a bearing; 6. an elliptic cylinder; 7. a first cylinder; 8. an elliptical hole; 9. a circular stepped hole; 10. locking the bracket; 101. a limiting plate; 102. a spiral spring; 103. a second cylinder; 104. an elliptical plate; 105. regular octagon blocks; 11. a fan case; 12. a fan blade; 13. a slide hole; 14. positioning columns; 15. a coil spring; 16. positioning holes; 17. a slip ring; 18. a baffle ring; 19. pressing the column.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.

In the description of the present utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Embodiment one:

Referring to fig. 1-9, the rotor of the miniature permanent magnet motor comprises a rotating shaft 1, a rotor iron core 2 is fixedly connected to the surface of the rotating shaft 1, a permanent magnet hole 3 is formed in the rotor iron core 2, a permanent magnet 4 is fixedly connected to the inner wall of the permanent magnet hole 3, a bearing 5 is fixedly connected to the surface of the rotating shaft 1, an elliptical column 6 is fixedly connected to the right side of the rotating shaft 1, a first cylinder 7 is arranged on the right side of the rotating shaft 1 in a fitting mode, an elliptical hole 8 is formed in the inner wall of the elliptical hole 8 and is in contact with the surface of the elliptical column 6, after the first cylinder 7 is sleeved on the elliptical column 6, the first cylinder 7 rotates along with the rotating shaft 1 through the cooperation of the elliptical column 6 and the elliptical hole 8, a circular stepped hole 9 is formed in the inner wall of the elliptical column 6, a locking support 10 is fixedly connected to the right side of the first cylinder 7 and the right side of the elliptical column 6, a fan shell 11 is fixedly connected to the surface of the first cylinder 7, a fan blade 12 is fixedly connected to the right side of the fan shell 11, and when the fan blade 12 rotates, the fan blade 12 dissipates heat of the rotor iron core 2 generated by the fan blade 12.

The dead support 10 includes limiting plate 101, limiting plate 101's right side and the inner wall contact of circular shoulder hole 9, limiting plate 101's surface and the equal fixedly connected with scroll spring 102 of inner wall of circular shoulder hole 9, limiting plate 101's right side fixedly connected with second cylinder 103, second cylinder 103's right side fixedly connected with elliptic plate 104, first cylinder 7's right side and elliptic cylinder 6's right side all contact with elliptic plate 104, through the cooperation of elliptic plate 104 and limiting plate 101, make second cylinder 103 unable horizontal migration in circular shoulder hole 9, the center of elliptic plate 104 and the center of elliptic cylinder 6 are on same horizontal line, elliptic plate 104's cross section shape is the same with the cross section shape of elliptic cylinder 6, when elliptic plate 104 staggers with elliptic cylinder 6, through scroll spring 102 for initial state, and through scroll spring 102's elasticity, make elliptic plate 104 unable autogenously rotate, when elliptic plate 104 and elliptic cylinder 6 align, scroll spring 102 takes place deformation, and, first cylinder 7 can directly separate with elliptic cylinder 6, right side fixedly connected with regular octagon block 105 of elliptic plate 104, second octagon block 105, regular octagon block 105 and regular octagon block 105 make the regular octagon block 105 more convenient when making regular octagon block 105 and regular octagon block on the same horizontal plane.

Embodiment two:

referring to fig. 1-8, a sliding hole 13 is formed in the right side of the elliptic cylinder 6, a positioning column 14 is attached to the inner wall of the sliding hole 13, a spiral spring 15 is fixedly connected to the left side of the positioning column 14 and the right side of the rotating shaft 1, a positioning hole 16 is formed in the elliptic plate 104, when the elliptic plate 104 is aligned with the elliptic cylinder 6, the positioning column 14 can be inserted into the positioning hole 16 through the elasticity of the spiral spring 15, and the elliptic plate 104 is locked through the cooperation of the positioning column 14 and the positioning hole 16, so that maintenance personnel does not need to rotate the elliptic plate 104 all the time when the first cylinder 7 is taken down from the elliptic cylinder 6, and simultaneously, before rotating the elliptic plate 104, the positioning column 14 needs to be pushed into the sliding hole 13 completely.

Embodiment III:

Referring to fig. 1-8, the surface laminating of regular octagon 105 is provided with sliding ring 17, sliding ring 17 can slide about regular octagon 105, regular octagon 105's fixed surface is connected with baffle ring 18, sliding ring 17 is located between baffle ring and the elliptic plate 104, make sliding ring 17 unable and regular octagon 105 separation through baffle ring 18, sliding ring 17's fixed surface is connected with presses post 19, press post 19's left side and the right side contact of reference column 14, press post 19's surface and the inner wall contact of locating hole 16, through pushing sliding ring 17 to the left, can make reference column 14 shift out from locating hole 16 or with elliptic plate 104 separation under the effect of pressing post 19, and then make the maintenance personal more convenient when removing reference column 14 from locating hole 16 or with elliptic plate 104 separation.

In the present utility model, when assembling the rotor, a user firstly applies a leftward pushing force to the positioning column 14 by pushing the slip ring 17 leftward, and makes the positioning column 14 completely move into the slide hole 13, then aligns the elliptical plate 104 with the elliptical column 6 by rotating the regular octagonal block 105, and releases the slip ring 17, at this time, the positioning column 14 is inserted into the positioning hole 16 by pushing the positioning column 14 by the coil spring 15, and locks the elliptical plate 104 by the cooperation of the positioning column 14 and the positioning hole 16, then the first cylinder 7 is sleeved on the elliptical column 6, then the pressing column 19 applies a leftward pushing force to the positioning column 14 by pushing the slip ring 17 leftward, and separates the positioning column 14 from the positioning hole 16, then, by rotating the regular octagonal block 105, the elliptic plate 104 and the elliptic cylinder 6 are staggered, at this time, the first cylinder 7 is fixed on the elliptic cylinder 6 through the elliptic plate 104, the elliptic plate 104 cannot automatically rotate through the elasticity of the spiral spring 102, when the fan blade 12 needs to be disassembled, the sliding ring 17 is pushed leftwards, the pressing column 19 applies leftwards pushing force to the positioning column 14, the positioning column 14 is completely moved into the sliding hole 13, then the elliptic plate 104 is aligned with the elliptic cylinder 6 through rotating the regular octagonal block 105, the sliding ring 17 is released, at this time, the positioning column 14 is inserted into the positioning hole 16 through the pushing force of the spiral spring 15 to the positioning column 14, and the elliptic plate 104 is locked through the cooperation of the positioning column 14 and the positioning hole 16, at this time, the first cylinder 7 can be removed from the elliptic cylinder 6.

The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Claims

1. The utility model provides a miniature permanent magnet motor's rotor, includes pivot (1), its characterized in that, the fixed surface of pivot (1) is connected with rotor core (2), permanent magnet hole (3) have been seted up to the inside of rotor core (2), the inner wall fixedly connected with permanent magnet (4) of permanent magnet hole (3), the fixed surface of pivot (1) is connected with bearing (5), the right side fixedly connected with elliptic cylinder (6) of pivot (1), the laminating of the right side of pivot (1) is provided with first cylinder (7), elliptical hole (8) have been seted up to the inside of first cylinder (7), the inner wall of elliptical hole (8) and the surface contact of elliptic cylinder (6), circular stepped hole (9) have been seted up to the inside of elliptic cylinder (6), the inner wall fixedly connected with locking support (10) of circular stepped hole (9), the right side of first cylinder (7) and the right side of elliptic cylinder (6) all contact with the left side of locking support (10), the fixed surface connection of first cylinder (7) has fan housing (11), fan housing (11) are connected with fan housing (11).

2. The rotor of a miniature permanent magnet motor according to claim 1, wherein the locking support (10) comprises a limiting plate (101), the right side of the limiting plate (101) is in contact with the inner wall of the circular stepped hole (9), the surface of the limiting plate (101) and the inner wall of the circular stepped hole (9) are fixedly connected with a spiral spring (102), the right side of the limiting plate (101) is fixedly connected with a second cylinder (103), the right side of the second cylinder (103) is fixedly connected with an elliptic plate (104), the right side of the first cylinder (7) and the right side of the elliptic cylinder (6) are in contact with the elliptic plate (104), and the right side of the elliptic plate (104) is fixedly connected with a regular octagonal block (105).

3. The rotor of a miniature permanent magnet motor according to claim 2, characterized in that the centre of the elliptical plate (104) is on the same level as the centre of the elliptical cylinder (6), the cross-sectional shape of the elliptical plate (104) being the same as the cross-sectional shape of the elliptical cylinder (6).

4. The rotor of a miniature permanent magnet motor according to claim 2, wherein a sliding hole (13) is formed in the right side of the elliptical column (6), a positioning column (14) is attached to the inner wall of the sliding hole (13), a coil spring (15) is fixedly connected to the left side of the positioning column (14) and the right side of the rotating shaft (1), and a positioning hole (16) is formed in the elliptical plate (104).

5. The rotor of a miniature permanent magnet motor according to claim 4, wherein a slip ring (17) is attached to the surface of the regular octagonal block (105), a baffle ring (18) is fixedly connected to the surface of the regular octagonal block (105), the slip ring (17) is located between the baffle ring (18) and the elliptical plate (104), a pressing column (19) is fixedly connected to the surface of the slip ring (17), the left side of the pressing column (19) is in contact with the right side of the positioning column (14), and the surface of the pressing column (19) is in contact with the inner wall of the positioning hole (16).

6. The rotor of a miniature permanent magnet motor according to claim 2, characterized in that the centers of the limiting plate (101), the second cylinder (103), the elliptical plate (104) and the regular octagon block (105) are all on the same horizontal line.