CN215071852U - Brushless motor rotor structure - Google Patents

Abstract

The utility model provides a brushless motor rotor structure, includes pivot and rotor core, be equipped with two end plates in the pivot, two end plates set up relatively, rotor core is located between the end plate, the end plate is fitted with a contraceptive ring and is equipped with end plate fixed tooth, it has the magnet steel to paste on the rotor core, the magnet steel sets up along rotor core whole body, and single end plate fixed tooth is located between the adjacent magnet steel. The utility model discloses under the condition that does not influence motor complete machine magnetic property, the rotor dynamic balance of being convenient for goes heavily, guarantees that the dynamic balance in-process can conveniently go heavily to operate, avoids the part to scrap, has improved the yields of brushless motor rotor dynamic balance process. Meanwhile, the magnetic steel is fixed in the radial direction and the axial direction, so that the motor runs at a high rotating speed and high performance, and the magnetic steel cannot fall off.

Description

Brushless motor rotor structure

Technical Field

The utility model relates to a brushless motor especially relates to a brushless motor rotor structure.

Background

With the technology of the dc brushless motor changing day by day, the quality requirement of the dc brushless motor is higher and higher, and the quality of the rotor dynamic balance of the dc brushless motor is one of the determining factors of the quality of the motor. At present, a surface-mounted rotor structure of a brushless motor does not have a structural part specially used for weight removal balance, a weight balance mode is mostly adopted, and the production efficiency and the reliability are low.

In addition, the performance of the surface-mounted magnetic steel rotor structure brushless motor is superior to that of the magnetic steel built-in rotor structure brushless motor, but the magnetic steel is bonded on a rotor core by glue, and the magnetic steel has a falling risk when the motor runs at a high rotating speed, so that the application of the surface-mounted brushless motor is limited.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that, overcome the above-mentioned defect that prior art exists, provide one kind under the condition that does not influence motor complete machine magnetic property, the rotor dynamic balance of being convenient for removes heavily, and the motor moves under high rotational speed high performance, and the brushless motor rotor structure that the magnet steel can not drop.

The utility model provides a technical scheme that its technical problem adopted is: the utility model provides a brushless motor rotor structure, includes pivot and rotor core, be equipped with two end plates in the pivot, two end plates set up relatively, rotor core is located between the end plate, the end plate is fitted with a contraceptive ring and is equipped with end plate fixed tooth, it has the magnet steel to paste on the rotor core, the magnet steel sets up along rotor core whole body, and single end plate fixed tooth is located between the adjacent magnet steel.

The end plate comprises a plurality of fixed teeth, and the number of the fixed teeth is correspondingly changed according to the size of the rotor and the number of the magnetic steels.

Furthermore, the cross section of the rotor core is in a shape of a polygon, and each side edge of the rotor core is pasted with one magnetic steel.

Further, interference fit is carried out between the rotor iron core and the rotating shaft.

Further, the section of the magnetic steel is arched.

The utility model discloses under the condition that does not influence motor complete machine magnetic property, the rotor dynamic balance of being convenient for goes heavily, guarantees that the dynamic balance in-process can conveniently go heavily to operate, avoids the part to scrap, has improved the yields of brushless motor rotor dynamic balance process. Meanwhile, the magnetic steel is fixed in the radial direction and the axial direction through the end plate, so that the motor runs at a high rotating speed and high performance, and the magnetic steel cannot fall off.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of the structure of FIG. 1;

FIG. 3 is a cross-sectional view A-A of FIG. 2;

FIG. 4 is a schematic view of the magnetic steel and the end face fixing teeth in the embodiment shown in FIG. 1;

FIG. 5 is a schematic structural view of an end plate of the embodiment of FIG. 1;

fig. 6 is a schematic structural view of the magnetic steel of the present invention;

fig. 7 is a schematic structural diagram of the rotor core of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1 to 7, the present embodiment includes two end plates 1, magnetic steel 2, a rotor core 3, and a rotating shaft 4, which are disposed opposite to each other.

The inner hole 32 of the rotor core 3 is interference-fitted with the rotating shaft. Magnet steel 2 is arched structure, and corresponding adjustment is made according to motor performance and rotor size requirement to the quantity of magnet steel 2, and the quantity of rotor magnet steel 2 is selected for use to this embodiment is 8, and magnet steel bonding surface 23 and rotor core bonding surface 31 are in the same place, and it is fixed to bond with glue.

The number of the end plate fixing teeth 14 on the end plate 1 in this embodiment is 8. The end plate fixing teeth 14 radially fix the rotor magnetic steel 2. The outer arc surface 21 of the magnetic steel 2 is matched with the inner arc surface 11 of the end plate fixing teeth 14, and the end plate fixing teeth 14 are provided with tooth end surfaces 12. The left end face 22 and the right end face 22 of a single magnetic steel 2 are respectively matched with the tooth end faces 12 of different end plate fixing teeth 14, namely the tooth end faces 12, close to each other, of two adjacent end plate fixing teeth 14 are used for fixing the magnetic steel 2, the inner arc faces of the end plate fixing teeth 14 are matched with the rotor core, and the magnetic steel 2 is radially fixed, so that the magnetic steel 2 cannot radially fall off when the motor runs at a high speed.

The inner hole 15 of the end plate 1 is in interference fit with the rotating shaft 4, and the end plate 1 is fixed on the rotor core 3. The magnet steel 2 is fixed on the inner planes 13 of the two end plates 1 in the axial direction, so that the magnet steel 2 cannot axially shift.

The material of the end plate 1 is preferably soft in hardness and has a certain strength of copper alloy or aluminum alloy, so that the fixed protection effect of the motor on the magnetic steel during high-speed operation can be ensured, and the end plate 1 cannot deform. The hardness of the end plate 1 is soft, so that the rotor can be conveniently subjected to dynamic balance and weight removal, the cutting is easy, and no harmful influence is caused on other parts.

Various modifications and variations of the present invention may be made by those skilled in the art, and they are within the scope of the present invention provided they are within the scope of the claims and their equivalents.

What is not described in detail in the specification is prior art that is well known to those skilled in the art.

Claims (4)

1. The utility model provides a brushless motor rotor structure, includes pivot and rotor core, its characterized in that: the rotor comprises a rotor core and is characterized in that two end plates are arranged on the rotating shaft and are arranged oppositely, the rotor core is located between the end plates, the end plates are provided with end plate fixing teeth, magnetic steel is pasted on the rotor core and is arranged around the rotor core, and the single end plate fixing tooth is located between the adjacent magnetic steels.

2. The brushless electric machine rotor structure of claim 1, wherein: the cross section of the rotor core is in a shape of a polygon, and each side edge of the rotor core is pasted with one magnetic steel.

3. The brushless motor rotor structure according to claim 1 or 2, wherein: and the rotor iron core is in interference fit with the rotating shaft.

4. The brushless motor rotor structure according to claim 1 or 2, wherein: the section of the magnetic steel is arched.

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