CN216794727U

CN216794727U - Rotor magnet pressing structure of brushless motor

Info

Publication number: CN216794727U
Application number: CN202123063229.4U
Authority: CN
Inventors: 戴永兵
Original assignee: Suzhou Liangming Tools Co ltd
Current assignee: Suzhou Liangming Tools Co ltd
Priority date: 2021-12-08
Filing date: 2021-12-08
Publication date: 2022-06-21
Anticipated expiration: 2031-12-08

Abstract

The utility model discloses a rotor magnet pressing structure of a brushless motor, which comprises a rotor, a bearing and fan blades, wherein the bearing and the fan blades are respectively sleeved on rotor shafts at the left end and the right end of the rotor; and a second end plate for compressing magnets on the rotor is sleeved between the end faces of the connecting ends of the rotor and the fan blades, and the second end plate is compressed and limited in a space between the end faces of the connecting ends of the rotor and the fan blades through the fan blades. The utility model saves at least half of the thickness of the original end cover, and reduces the overall height of the brushless motor; the requirement of the end plate on the fit tolerance is reduced, so that the processing difficulty is reduced, and the production cost is further saved; the overall weight of the brushless motor is indirectly reduced; the installation difficulty is reduced, the average working time of mass assembly is greatly reduced, and the production efficiency is improved.

Description

Rotor magnet pressing structure of brushless motor

Technical Field

The utility model belongs to the field of brushless motors, and particularly relates to a rotor magnet pressing structure of a brushless motor.

Background

At present in brushless motor product, the rotor adopts both sides metal end cover to compress tightly the magnetite structure mostly to accomplish the axial positioning of rotor, but this kind compresses tightly fixed mode and often has following several defects:

1. the metal end cover of the magnet on the fixed rotor is generally made of copper, so that the overall cost of the brushless motor is increased linearly;

2. the metal end covers need to be arranged at two ends of the magnet on the rotor and need to finish axial fixation, so that the requirement on the installation and matching tolerance of the end cover hole and the rotor shaft on the rotor is higher, and the processing difficulty and the processing cost of the copper metal end cover are indirectly increased;

3. in the process of actually producing the metal end cover, the size of the fit installation interference allowance between the end cover hole and the rotor shaft on the rotor is difficult to control, so that the rotor is easy to have problems in the installation process, and the average installation working time is greatly prolonged; meanwhile, the matching precision of the end cover hole and the rotor shaft on the rotor directly influences the service life of the motor rotor;

4. the greater thickness of the metal end caps results in a higher rotor height after installation, resulting in greater volume and mass in a brushless motor of the same output and speed.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems in the prior art, the utility model aims to provide a rotor magnet compression structure of a brushless motor, which reduces the processing and installation difficulty, improves the working efficiency, reduces the production cost and prolongs the service life.

In order to achieve the technical purpose and effect, the utility model is realized by the following technical scheme:

a rotor magnet pressing structure of a brushless motor comprises a rotor, a bearing and fan blades, wherein the bearing and the fan blades are respectively sleeved on rotor shafts at the left end and the right end of the rotor; the second end plate is used for compressing magnets on the rotor, and the second end plate is compressed and limited in a space between the rotor and the end face of the fan blade connecting end through the fan blade.

Furthermore, be provided with a plurality of on the second end plate and be used for the chucking the pin hole of the magnetite on the rotor, all the pin hole all is located the second end plate with on the rotor connection terminal surface.

Further, the inner diameter of the second end plate is smaller than the diameter of the rotor shaft of the rotor, and the second end plate is in interference fit with the rotor shaft of the rotor.

Furthermore, the second end plate is made of rubber.

Further, the inner diameter of the first end plate is smaller than the diameter of the rotor shaft of the rotor, and the first end plate is in interference fit with the rotor shaft of the rotor.

Furthermore, the first end plate is made of high-strength plastic.

The utility model has the following beneficial effects:

1. according to the utility model, by adopting the scheme that the bearing pressing end plate, the end plate press the magnets on the rotor, and the other end of the fan blade presses the end plate and the end plate presses the magnets on the rotor, the axial position of the rotor is fixed through the bearing and the fan blade, at least half of the thickness of the original end cover is saved, and the overall height of the brushless motor is reduced;

2. the end plate is made of hard plastics and rubber, so that a large amount of cost is saved, the requirement on the matching tolerance of the end plate is reduced, the processing difficulty is reduced, and the production cost is further saved; meanwhile, the overall weight of the brushless motor is indirectly reduced;

3. the end plate of the utility model can be directly pressed into the rotor shaft on the rotor by adopting the air compressor, the mounting difficulty is reduced, the average working time of mass assembly is greatly reduced, and the production efficiency is improved.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings. The detailed description of the present invention is given in detail by the following examples and the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the utility model and together with the description serve to explain the utility model without limiting the utility model. In the drawings:

FIG. 1 is a schematic view of the overall structure of a first view angle of the present invention;

FIG. 2 is a schematic view of a second perspective overall structure of the present invention;

fig. 3 is a front view of the present invention.

The reference numbers in the figures illustrate: 1. a rotor; 2. a bearing; 3. a fan blade; 4. a first end plate; 5. a second end plate; 6 perforation.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

It should be noted that all the directional indications (such as up, down, left, right, front, back, upper end, lower end, top, bottom … …) in the embodiments of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indication is changed accordingly.

Referring to fig. 1-3, a rotor magnet pressing structure of a brushless motor includes a rotor 1, a bearing 2 and a fan blade 3, where the bearing 2 and the fan blade 3 are respectively sleeved on rotor shafts at left and right ends of the rotor 1, a first end plate 4 for pressing a magnet on the rotor 1 is sleeved between end faces of a connection end of the rotor 1 and the bearing 2, and the first end plate 4 is pressed and limited in a space between the end faces of the connection end of the rotor 1 and the bearing 2 through the bearing 2; the rotor 1 with the cover is equipped with and is used for compressing tightly between the 3 link end faces of fan blade the second end plate 5 of the last magnetite of rotor 1, second end plate 5 passes through fan blade 3 compresses tightly spacing rotor 1 with in the space between the 3 link end faces of fan blade, be favorable to reducing the height of rotor 1 to save motor manufacturing cost.

Further, be provided with a plurality of on the second end plate 5 and be used for the chucking the tooth hole 6 of the magnetite on the rotor 1, all tooth hole 6 all is located second end plate 5 with on the 1 link terminal surface of rotor, will during the installation 4 magnetite cards in the rotor 1 are in the end plate in the tooth hole 6, it is convenient right the magnetite on the rotor 1 is fixed.

Further, the inner diameter of the second end plate 5 is smaller than the diameter of the rotor shaft of the rotor 1, and the second end plate 5 is in interference fit with the rotor shaft of the rotor 1, so that the second end plate 5 is more tightly attached to the magnet on the rotor 1.

Furthermore, the second end plate 5 is made of rubber, so that the mounting difficulty and the requirement on the matching tolerance of the second end plate 5 are reduced.

Further, the inner diameter of the first end plate 4 is smaller than the diameter of the rotor shaft of the rotor 1, and the first end plate 4 is in interference fit with the rotor shaft of the rotor 1, so that the first end plate 5 is more tightly attached to the magnet on the rotor 1.

Furthermore, the first end plate 4 is made of plastic with high strength, so that the mounting difficulty and the requirement on the fit tolerance of the first end plate 4 are reduced.

The working principle of the utility model is as follows:

when the magnetic bearing is installed, the bearing 2 and the first end plate 4 are pressed together, and then the bearing is pressed into a rotor shaft at one end of the rotor 1 through an air compressor until the first end plate 4 is tightly attached to a magnet at one end of the rotor 1; and the other side of the rotor is similar to the other side of the rotor, the fan blade 3 and the second end plate 5 are firstly pressed together, and then the fan blade is pressed into the rotor shaft at the other end of the rotor 1 through an air compressor until the second end plate 5 is tightly attached to the magnet at the other end of the rotor 1, and at the moment, the magnet on the rotor 1 is clamped in the tooth hole 6 on the second end plate 5.

In summary, the utility model adopts the scheme that the bearing pressing end plate, the end plate pressing the magnet on the rotor and the other end blade pressing end plate, the end plate pressing the magnet on the rotor, fixes the axial position of the rotor through the bearing and the wind blade, saves at least half of the thickness of the original metal end cover, and reduces the integral height of the brushless motor; the hard plastic and the rubber are adopted, so that not only is a great deal of cost saved, but also the requirement on the fit tolerance of the end plate is reduced, the processing difficulty is reduced, and the production cost is further saved; meanwhile, the overall weight of the brushless motor is indirectly reduced; the end plate can be directly pressed into the rotor shaft on the rotor by the gas compressor, the installation difficulty is reduced, the average working time of mass assembly is greatly reduced, and the production efficiency is improved

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a brushless motor's rotor magnetite compact structure, includes rotor (1), bearing (2) and fan blade (3), bearing (2) with fan blade (3) overlap respectively and are established on the rotor shaft at both ends about rotor (1), its characterized in that: a first end plate (4) used for compressing magnets on the rotor (1) is sleeved between the end face of the connecting end of the rotor (1) and the bearing (2), and the first end plate (4) is compressed and limited in a space between the end face of the connecting end of the rotor (1) and the bearing (2) through the bearing (2); the rotor (1) with the cover is equipped with between fan blade (3) the link terminal surface and is used for compressing tightly second end plate (5) of the magnetite on rotor (1), second end plate (5) pass through fan blade (3) compress tightly spacing be in rotor (1) with in the space between the link terminal surface of fan blade (3).

2. The rotor magnet pressing structure of a brushless motor according to claim 1, wherein: be provided with on second end plate (5) a plurality of and be used for the chucking fluted hole (6) of the magnetite on rotor (1), all fluted hole (6) all are located second end plate (5) with on the rotor (1) link terminal surface.

3. The rotor magnet pressing structure of a brushless motor according to claim 2, wherein: the inner diameter of the second end plate (5) is smaller than the diameter of the rotor shaft of the rotor (1), and the second end plate (5) is in interference fit with the rotor shaft of the rotor (1).

4. The rotor magnet pressing structure of a brushless motor according to claim 3, wherein: the second end plate (5) is made of rubber.

5. The rotor magnet pressing structure of a brushless motor according to claim 1, wherein: the inner diameter of the first end plate (4) is smaller than the diameter of a rotor shaft of the rotor (1), and the first end plate (4) is in interference fit with the rotor shaft of the rotor (1).

6. The rotor magnet pressing structure of a brushless motor according to claim 5, wherein: the first end plate (4) is made of high-strength plastic.