CN218162022U

CN218162022U - Assembly structure of ball bearing and stator core of outer rotor brushless motor

Info

Publication number: CN218162022U
Application number: CN202222128824.XU
Authority: CN
Inventors: 刘德广; 周翔
Original assignee: Hunan Guomeng Technology Co ltd
Current assignee: Hunan Guomeng Technology Co ltd
Priority date: 2022-08-15
Filing date: 2022-08-15
Publication date: 2022-12-27
Anticipated expiration: 2032-08-15

Abstract

The utility model discloses an outer rotor brushless motor ball bearing and stator core assembly structure relates to brushless motor technical field. The utility model comprises a central shaft, a base and a first ball bearing are arranged around the central shaft, and a stator core is arranged around the base; the stator core is located the week side of first ball bearing, and first ball bearing is located the one end of base, and first ball bearing is just in the internal diameter of stator core of packing into, and first ball bearing external diameter is the same with stator core's internal diameter. The utility model discloses an in first ball bearing is just to packing into stator core's internal diameter, reduce because of first ball bearing adopts clearance fit to pack into the bearing room of base, lead to the stator core internal diameter to be greater than first ball bearing external diameter to reduce stator core's groove area, weakened the probability of motor dynamics, it is the same with stator core's internal diameter through first ball bearing external diameter, improve stator core's groove area.

Description

Assembly structure of ball bearing and stator core of outer rotor brushless motor

Technical Field

The utility model belongs to the technical field of brushless motor, especially, relate to an outer rotor brushless motor ball bearing and stator core assembly structure.

Background

The brushless motor is a typical electromechanical integrated product, and because the brushless motor operates in a self-control mode, a starting winding is not additionally arranged on a rotor like a synchronous motor which is started under heavy load under variable frequency speed regulation, and oscillation and step loss are not generated when load suddenly changes.

In the existing brushless motor outer rotor structure industry, the ball bearing adopts the scheme design that the ball bearing is arranged in a fixed support bearing chamber in a clearance fit mode, the design can lead the inner diameter of a stator core to be larger than the outer diameter of the ball bearing, the groove area of the stator core is reduced, and the motor force is weakened.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an external rotor brushless motor ball bearing and stator core assembly structure, in having solved current brushless motor external rotor structure industry, the scheme design that ball bearing adopted is that clearance fit packs into the fixing support bearing room, and this design can lead to stator core internal diameter to be big than ball bearing external diameter, has reduced stator core's groove area, has weakened the technical problem of motor dynamics.

In order to achieve the purpose, the utility model is realized by the following technical proposal:

an assembly structure of a ball bearing and a stator core of an outer rotor brushless motor comprises a central shaft, wherein a base and a first ball bearing are arranged on the periphery of the central shaft, and a stator core is arranged on the periphery of the base;

the stator core is located the week side of first ball bearing, and first ball bearing is located the one end of base, and first ball bearing is just in the internal diameter of stator core of packing into, and first ball bearing external diameter is the same with stator core's internal diameter.

Optionally, a notch is formed in one end, away from the stator core, of the base, a second ball bearing is arranged in the notch, the second ball bearing is located on the periphery of the central shaft, the central shaft is located at one end of the stator core, a ring groove is formed in the periphery of the central shaft, a clamp spring corresponding to the ring groove is arranged on the periphery of the central shaft, and the clamp spring is located at one end of the second ball bearing.

Optionally, a second gasket is arranged between the clamp spring and the second ball bearing, and the second gasket is sleeved on the periphery of the central shaft.

Optionally, an end cover is disposed on the periphery of the central shaft, a permanent magnet is disposed on the periphery of the inner wall of the end cover, the permanent magnet is located on the periphery of a stator core, the stator core is located in the end cover, a first gasket is disposed between the first ball bearing and one end of the inner wall of the end cover, and the first gasket is sleeved on the periphery of the central shaft.

The embodiment of the utility model has the following beneficial effect:

the utility model discloses an embodiment is just in the internal diameter of packing into stator core through first ball bearing, reduce because of first ball bearing adopts clearance fit to pack into the bearing room of base, lead to the stator core internal diameter to be greater than first ball bearing external diameter to reduced stator core's groove area, weakened the probability of motor dynamics, internal diameter through first ball bearing external diameter and stator core is the same, improve stator core's groove area, with this increase motor dynamics, reduce the cost, improve production efficiency.

Of course, it is not necessary for any particular product to achieve all of the above-described advantages at the same time.

Drawings

The accompanying drawings, which form a part of the specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and do not constitute a limitation on the scope of the invention. In the drawings:

fig. 1 is a schematic perspective view of an embodiment of the present invention;

fig. 2 is a schematic cross-sectional view of an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a in fig. 2.

Wherein the figures include the following reference numerals:

stator core 1, base 2, first ball bearing 3, second ball bearing 4, first gasket 5, second gasket 6, permanent magnet 7, end cover 8, center pin 9, jump ring 10.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

To keep the following description of the embodiments of the present invention clear and concise, a detailed description of known functions and known parts of the invention has been omitted.

Referring to fig. 1 to 3, in the present embodiment, an outer rotor brushless motor ball bearing and stator core assembly structure is provided, including: a central shaft 9, wherein a base 2 and a first ball bearing 3 are arranged on the periphery of the central shaft 9, and a stator core 1 is arranged on the periphery of the base 2;

stator core 1 is located the week side of first ball bearing 3, and first ball bearing 3 is located the one end of base 2, and first ball bearing 3 is just to packing into in the internal diameter of stator core 1, and the external diameter of first ball bearing 3 is the same with the internal diameter of stator core 1.

The application of one aspect of the embodiment is as follows: the first ball bearing 3 is directly fitted into the inner diameter of the stator core 1.

Through first ball bearing 3 just to in the internal diameter of stator core 1 of packing into, reduce and adopt clearance fit to pack into the bearing room of base 2 because of first ball bearing 3, lead to stator core 1 internal diameter to be greater than 3 external diameters of first ball bearing, thereby stator core 1's groove area has been reduced, the probability of motor dynamics has been weakened, internal diameter through 3 external diameters of first ball bearing is the same with stator core 1, improve stator core 1's groove area, with this increase motor dynamics, reduce the cost, improve production efficiency.

As shown in fig. 2, in the present embodiment, an end cover 8 is provided around a central shaft 9, a permanent magnet 7 is provided around an inner wall of the end cover 8, the permanent magnet 7 is located around the stator core 1, and the stator core 1 is located inside the end cover 8. Be equipped with first gasket 5 between first ball bearing 3 and the 8 inner wall one end of end cover, first gasket 5 cover is established in the week side of center pin 9, reduces the probability of contact wear between first ball bearing 3, stator core 1 and the end cover 8 through first gasket 5.

As shown in fig. 1-3, a notch is formed at an end of the base 2 away from the stator core 1, a second ball bearing 4 is disposed in the notch, the second ball bearing 4 is located on a peripheral side of the central shaft 9, and the central shaft 9 is located at an end of the stator core 1. The annular groove has been seted up to center pin 9 week side, and center pin 9 week side is equipped with the jump ring 10 corresponding with the annular, and jump ring 10 is located the one end of second ball bearing 4, and jump ring 10 card is in the annular, reduces the gliding probability of jump ring 10 along center pin 9 axial direction through the annular. Be equipped with second gasket 6 between jump ring 10 and the second ball bearing 4, second gasket 6 cover is established in the week side of center pin 9, reduces the probability of second ball bearing 4 and jump ring 10 contact wear through second gasket 6.

The above embodiments may be combined with each other.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the accompanying drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.

In the description of the present invention, it should be understood that the directions or positional relationships indicated by the directional terms such as "front, back, upper, lower, left, right", "horizontal, vertical, horizontal" and "top, bottom", etc. are usually based on the directions or positional relationships shown in the drawings, and are only for convenience of description and simplification of the description, and in the case of not making a contrary explanation, these directional terms do not indicate and imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore, should not be construed as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Claims

1. The utility model provides an outer rotor brushless motor ball bearing and stator core assembly structure which characterized in that includes: the device comprises a central shaft (9), wherein a base (2) and a first ball bearing (3) are arranged on the periphery of the central shaft (9), and a stator core (1) is arranged on the periphery of the base (2);

the stator core (1) is located on the periphery of the first ball bearing (3), the first ball bearing (3) is located at one end of the base (2), the first ball bearing (3) is just opposite to the inner diameter of the stator core (1), and the outer diameter of the first ball bearing (3) is the same as the inner diameter of the stator core (1).

2. An external rotor brushless motor ball bearing and stator core assembly structure according to claim 1, wherein an end cover (8) is provided around the central shaft (9), and permanent magnets (7) are provided around the inner wall of the end cover (8).

3. An external rotor brushless motor ball bearing and stator core assembling structure as claimed in claim 2, wherein a first gasket (5) is provided between the first ball bearing (3) and one end of the inner wall of the end cap (8).

4. An assembling structure of ball bearing and stator core of external rotor brushless motor according to claim 1, characterized in that the end of the base (2) away from the stator core (1) is provided with a notch, and a second ball bearing (4) is arranged in the notch.

5. An assembling structure of ball bearing and stator core of external rotor brushless motor according to claim 4, characterized in that a ring groove is opened around the central shaft (9), and a snap spring (10) corresponding to the ring groove is opened around the central shaft (9).

6. An external rotor brushless motor ball bearing and stator core assembling structure according to claim 5, characterized in that a second gasket (6) is arranged between the circlip (10) and the second ball bearing (4).