CN216904458U

CN216904458U - Motor rotor

Info

Publication number: CN216904458U
Application number: CN202220386351.0U
Authority: CN
Inventors: 王凯旋
Original assignee: Prestolite Electric Weifang Ltd
Current assignee: Prestolite Electric Weifang Ltd
Priority date: 2022-02-24
Filing date: 2022-02-24
Publication date: 2022-07-05
Anticipated expiration: 2032-02-24

Abstract

The utility model discloses a motor rotor, which belongs to the technical field of motors and comprises a rotating shaft and a rotor core arranged on the rotating shaft, wherein a sleeve is arranged between the rotor core and the rotating shaft, the sleeve is provided with a plurality of axial holes, two ends of the sleeve are respectively provided with an annular sleeve end plate covering the end part of the axial hole, two ends of the rotor core are provided with rotor baffles, and the rotor baffles axially compress the sleeve end plates at the end part of the sleeve.

Description

Motor rotor

Technical Field

The utility model belongs to the technical field of motors, and particularly relates to a motor rotor.

Background

Generally, the permanent magnet synchronous motor of the new energy commercial vehicle is large in size, the outer diameter of a rotor core is large, and the permanent magnet synchronous motor is not easy to be directly assembled on a rotating shaft, so that a sleeve is added between the rotor core and the rotating shaft to reduce the weight of the rotor. In order to reduce the weight of the sleeve, the sleeve is generally manufactured in an extrusion or casting forming mode, and two ends of the sleeve after extrusion or casting are in an opening state, so that the noise is high in the operation process of the rotor, the wind friction loss is high, and the efficiency of the whole machine is influenced.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is as follows: the utility model provides a motor rotor, can reduce the rotor rotation in-process wind friction loss, improve complete machine efficiency, can also reduce the noise simultaneously.

In order to solve the technical problems, the technical scheme of the utility model is as follows:

the utility model provides an electric motor rotor, include the pivot with install in the rotor core of pivot, rotor core with install the sleeve between the pivot, a plurality of axial holes have been seted up to the sleeve, the cover is installed respectively at the sleeve both ends the annular sleeve end plate of axial hole tip, rotor baffle is installed at rotor core's both ends, rotor baffle will sleeve end plate axial compress tightly in sleeve tip.

Furthermore, the rotor baffle is of an annular structure, and a through hole which is communicated with the axial hole and the outside is formed in the sleeve end plate which is positioned in the inner ring of the rotor baffle.

Further, the adjacent axial holes are communicated.

Furthermore, a plurality of grooves communicated with two adjacent axial holes are formed in the two ends of the sleeve.

Furthermore, the two sleeve end plates are respectively provided with one through hole.

Furthermore, the rotor baffle is installed on the sleeve through a screw, and the rotor baffle and the sleeve end plate are respectively provided with a via hole.

Further, bearings are respectively installed at two ends of the rotating shaft.

After the technical scheme is adopted, the utility model has the beneficial effects that:

the motor rotor comprises a rotating shaft and a rotor core arranged on the rotating shaft, a sleeve is arranged between the rotor core and the rotating shaft, a plurality of axial holes are formed in the sleeve, annular sleeve end plates covering the end parts of the axial holes are respectively arranged at two ends of the sleeve, rotor baffles are arranged at two ends of the rotor core, the sleeve end plates are axially and tightly pressed on the end parts of the sleeve by the rotor baffles, and two ends of the axial holes are sealed, so that the wind friction loss in the rotating process of the rotor can be reduced, the energy consumption is reduced, the efficiency of the whole machine is improved, and the noise can be reduced.

Drawings

FIG. 1 is an exploded view of the rotor of the motor of the present invention;

FIG. 2 is a schematic perspective view of a rotor of the motor of the present invention;

FIG. 3 is a side view of the rotor of the motor of the present invention;

FIG. 4 is a cross-sectional view taken along line A-A of FIG. 3;

FIG. 5 is a schematic structural view of a sleeve end plate;

FIG. 6 is a schematic view of a portion of the construction of the rotor of the present invention;

in the figure, 10-rotating shaft, 11-rotor iron core, 12-rotor baffle, 13-screw, 14-via hole, 15-bearing, 20-sleeve, 21-groove, 22-threaded hole, 23-axial hole, 30-sleeve end plate and 31-through hole.

Detailed Description

The utility model is further illustrated with reference to the following figures and examples.

All directions referred to in the present specification are based on the drawings, and represent relative positional relationships only, and do not represent absolute positional relationships.

As shown in fig. 1 to 4, a motor rotor includes a rotating shaft 10 and a rotor core 11 installed on the rotating shaft 10, a sleeve 20 is installed between the rotor core 11 and the rotating shaft 10, the sleeve 20 is provided with a plurality of axial holes 23, and annular sleeve end plates 30 covering ends of the axial holes 23 are installed at two ends of the sleeve 20 respectively. Rotor baffle 12 is installed at the both ends of rotor core 11, and rotor baffle 12 compresses tightly sleeve end plate 30 axial in sleeve 20 tip to seal axial hole 23 both ends, reduce rotor rotatory in-process wind friction loss and noise. Wherein, the inner ring side of the sleeve end plate 30 is against the circumference of the rotating shaft 10, the outer ring diameter is the same as the sleeve 20, and the outer ring side is against the inner side of the rotor baffle 12.

As shown in fig. 4 and fig. 5, the rotor guard 12 is an annular structure, and a sleeve end plate 30 located at an inner ring of the rotor guard 12 is provided with a through hole 31 for communicating the axial hole 23 with the outside, so as to balance the air pressure inside the sleeve 20 with the outside. The sleeve end plate 30 may be provided with a plurality of through holes 31 corresponding to the axial holes 23, so that each axial hole 23 can be communicated with the outside through the corresponding through hole 31.

As shown in fig. 6, further, the adjacent axial holes 23 communicate with each other, so that the interior of the sleeve 20 is in air communication. Wherein, both ends of the sleeve 20 are provided with a plurality of grooves 21 communicating with two adjacent axial holes 23. Because the axial holes 23 in the sleeve 20 are communicated with each other, the two sleeve end plates 30 are respectively provided with a through hole 31 in the scheme, so that the communication between the axial holes 23 and the outside can be ensured, and the air pressure in the sleeve 20 is balanced with the air pressure in the outside.

As shown in fig. 1, 2 and 4, the rotor baffle 12 is mounted to the sleeve 20 through a plurality of screws 13, the rotor baffle 12 and the sleeve end plate 30 are respectively provided with a through hole 14, and the end surface of the sleeve 20 is correspondingly provided with a plurality of threaded holes 22. Bearings 15 are further respectively mounted at two ends of the rotating shaft 10, so that the rotor can rotate conveniently when the motor works.

The motor rotor is characterized in that sleeve end plates covering the end parts of the axial holes are respectively arranged at the two ends of the sleeve. Rotor baffles are installed at two ends of the rotor core, the rotor baffles axially compress the sleeve end plate at the end part of the sleeve, two ends of an axial hole are sealed, wind friction loss and noise in the rotating process of the rotor are reduced, energy consumption is reduced, and overall efficiency is improved.

While specific embodiments of the utility model have been described above, it will be understood by those skilled in the art that the described embodiments are only some, and not all, of the present invention, which is presented by way of example only, and the scope of the utility model is defined by the appended claims. Various changes or modifications to these embodiments may be made by those skilled in the art without departing from the principle and spirit of the utility model, and these changes and modifications all fall within the scope of the utility model.

Claims

1. The utility model provides an electric motor rotor, including the pivot with install in the rotor core of pivot, rotor core with install the sleeve between the pivot, a plurality of axial holes have been seted up to the sleeve, its characterized in that, the cover is installed respectively at the sleeve both ends the annular sleeve end plate of axial hole tip, rotor baffle is installed at rotor core's both ends, rotor baffle will sleeve end plate axial compress tightly in sleeve tip.

2. The motor rotor as claimed in claim 1, wherein the rotor baffle is of an annular structure, and the sleeve end plate located at the inner ring of the rotor baffle is provided with a through hole communicating the axial hole with the outside.

3. The electric machine rotor as recited in claim 2, wherein adjacent axial bores communicate therebetween.

4. The motor rotor as claimed in claim 3, wherein the sleeve has a plurality of grooves formed at both ends thereof for communicating two adjacent axial holes.

5. The electric machine rotor as claimed in claim 4, wherein each of said sleeve end plates is formed with one of said through holes.

6. The electric machine rotor of any one of claims 1 to 5, wherein the rotor baffle is mounted to the sleeve by screws, and the rotor baffle and the sleeve end plate are respectively provided with a through hole.

7. The electric machine rotor as recited in claim 6, wherein bearings are respectively mounted to both ends of the rotating shaft.