CN209930046U

CN209930046U - Rotor magnet steel

Info

Publication number: CN209930046U
Application number: CN201821651747.3U
Authority: CN
Inventors: 丁洁; 管华; 饶启明; 赵云峰; 文明; 欧阳山
Original assignee: ANHUI TONGHUA NEW ENERGY POWER Co Ltd
Current assignee: ANHUI TONGHUA NEW ENERGY POWER Co Ltd
Priority date: 2018-10-11
Filing date: 2018-10-11
Publication date: 2020-01-10
Anticipated expiration: 2028-10-11

Abstract

The utility model provides a rotor magnetic steel, which comprises an annular magnetic steel unit, wherein the axial end faces of at least two magnetic steel units are mutually laminated and arranged to form a tubular magnetic steel body; a limiting groove is formed in the inner wall of the annular magnetic steel unit, and the groove length direction of the limiting groove is consistent with the axial direction of the magnetic steel unit; the rotor core is characterized in that a convex strip is arranged on the outer wall of the rotor core, the length direction of the convex strip is consistent with the axial direction of the rotor core, and the convex strip is matched with a limiting groove of the magnetic steel unit to limit the circumferential rotation of the magnetic steel unit relative to the rotor core. Just so can directly overlap annular magnet steel unit in proper order and establish to rotor core on, workman convenient operation has improved magnet steel body's installation effectiveness, and this application can arrange the magnet steel unit of corresponding quantity according to the different axial length of rotor core, need not in addition the design and manufacture magnet steel. In addition, even on a high-speed motor, the magnetic steel body cannot fall off.

Description

Rotor magnet steel

Technical Field

The utility model relates to the technical field of electric machines, concretely relates to constitute electric motor rotor's magnet steel.

Background

At present, the rotor magnetic steel of the permanent magnet synchronous motor is generally tile-shaped, the magnetic steel is also called a magnetic tile, the magnetic tiles are generally pasted on the outer surface of a rotor core by glue, the magnetic tiles on the general medium-low speed motor can be arranged in the way, and after the high-speed motor is bonded, an annular magnetic tile sleeve is required to be additionally sleeved on the outer surface of the magnetic tile to prevent the magnetic tile from falling off in the using process.

In the process of bonding the magnetic shoes and the motor, glue is generally coated on the inner side surfaces of the magnetic shoes and then is attached to the surface of the rotor core, and due to the magnetic force between the magnetic shoes and the rotor core and the magnetic force between the two magnetic shoes, after the magnetic shoes are attached to the rotor core, the magnetic shoes are manually pressed until the glue is used for primarily bonding the magnetic shoes and the rotor core, so that the mounting efficiency of the magnetic shoes is low, and the labor intensity of workers is increased; in addition, the N pole and the S pole of the magnetic shoe need to be arranged after being distinguished by workers, and once the arrangement direction of the magnetic shoe is wrong, the motor cannot run.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a magnet steel easy to assemble improves electric motor rotor's assembly quality and assembly efficiency.

In order to realize the purpose, the technical scheme is as follows: a rotor magnetic steel comprises annular magnetic steel units, wherein axial end faces of at least two magnetic steel units are mutually attached and arranged to form a tubular magnetic steel body;

a limiting groove is formed in the inner wall of the annular magnetic steel unit, and the groove length direction of the limiting groove is consistent with the axial direction of the magnetic steel unit;

the rotor core is characterized in that a convex strip is arranged on the outer wall of the rotor core, the length direction of the convex strip is consistent with the axial direction of the rotor core, and the convex strip is matched with a limiting groove of the magnetic steel unit to limit the circumferential rotation of the magnetic steel unit relative to the rotor core.

Compared with the prior art, the utility model discloses a technological effect does: just so can directly overlap annular magnet steel unit in proper order and establish to rotor core on, workman convenient operation has improved magnet steel body's installation effectiveness, and this application can arrange the magnet steel unit of corresponding quantity according to the different axial length of rotor core, need not in addition the design and manufacture magnet steel. In addition, even on a high-speed motor, the magnetic steel body cannot fall off.

Drawings

FIG. 1 is a schematic perspective view of a magnetic steel body;

FIG. 2 is an exploded view of the rotor of the motor;

FIG. 3 is a half sectional view of a rotor of the motor;

fig. 4 is a sectional view a-a in fig. 3.

Detailed Description

A rotor magnetic steel comprises annular magnetic steel units 11, and at least two axial end faces of the magnetic steel units 11 are mutually attached and arranged to form a tubular magnetic steel body 10.

The workman directly overlaps annular magnet steel unit 11 in proper order and establishes to rotor core 20 on, workman convenient operation has improved magnet steel body 10's installation effectiveness, and this application can arrange the magnet steel unit of corresponding quantity according to the different axial length of rotor core 20, need not in addition the design and manufacture magnet steel. In addition, even on a high-speed motor, the magnetic steel body cannot fall off.

In order to effectively limit the circumferential rotation of the magnetic steel unit 11, a limit groove 12 is formed in the inner wall of the annular magnetic steel unit 11, and the groove length direction of the limit groove 12 is consistent with the axial direction of the magnetic steel unit 11;

convex strips 21 are arranged on the outer wall of the rotor core 20, the length direction of the convex strips 21 is consistent with the axial direction of the rotor core 20, and the convex strips 21 are matched with the limiting grooves 12 of the magnetic steel units 11 to limit the circumferential rotation of the magnetic steel units 11 relative to the rotor core 20. In addition, the worker does not need to recognize the magnetic poles of the magnetic steel unit 11, and directly inserts the limiting groove 12 of the magnetic steel unit 11 into the protruding strip 21 of the rotor core 20 in an aligned manner.

At least two limiting grooves 12 are uniformly arranged along the circumferential direction of the magnetic steel body 10 at intervals, so that the circumferential position of the magnetic steel unit 11 is further reliably limited.

The magnetic steel motor rotor of the present application is described below, in which a rotating shaft 30 is press-fitted in the middle of a rotor core 20, and an annular magnetic steel body 10 is sleeved outside the rotor core 20.

Wherein annular magnet steel body 10 can bond to rotor core 20 with glue on, but this kind of mode can't be reliably fixed rotor core 20 and magnet steel body 10, consequently, this application adopts following scheme to limit magnet steel body 10's axial position.

In-process on rotor core 20 is established to annular magnet steel unit 11 cover in proper order, two adjacent magnet steel unit 11 repel each other and can't hug closely, consequently for the axial position of restriction annular magnet steel unit 11, the cover is equipped with annular end plate 40 on the pivot 30 of rotor core 20 both ends department respectively, and end plate 40's external diameter size is located between the inside and outside diameter size of magnet steel body 10, and both ends plate 40 presses respectively and supports on the both ends of magnet steel body 10.

The rotary shaft 30 is provided with a pressing ring 50 in a pressing mode, the end plate 40 is located between the pressing ring 50 and the end face of the magnetic steel body 10, and the pressing ring 50 presses the end plate 40 to the end face of the magnetic steel body 10. End plate 40 and pivot 30 clearance fit, end plate 40 and pivot 30 assembly back, through clamping ring 50 and pivot 30 interference fit, clamping ring 50 can compress tightly end plate 40 on the terminal surface of magnet steel body 10 reliably.

Claims

1. A rotor magnet steel, its characterized in that: the magnetic steel pipe comprises annular magnetic steel units (11), wherein axial end faces of at least two magnetic steel units (11) are mutually attached and arranged to form a tubular magnetic steel body (10);

a limiting groove (12) is formed in the inner wall of the annular magnetic steel unit (11), and the groove length direction of the limiting groove (12) is consistent with the axial direction of the magnetic steel unit (11);

convex strips (21) are arranged on the outer wall of the rotor core (20), the length direction of the convex strips (21) is consistent with the axial direction of the rotor core (20), and the convex strips (21) are matched with the limiting grooves (12) of the magnetic steel units (11) to limit the circumferential rotation of the magnetic steel units (11) relative to the rotor core (20).

2. Rotor magnetic steel according to claim 1, wherein: at least two limiting grooves (12) are uniformly arranged at intervals along the circumferential direction of the magnetic steel body (10).