CN212784939U

CN212784939U - Motor rotor

Info

Publication number: CN212784939U
Application number: CN202021913685.6U
Authority: CN
Inventors: 张红亮
Original assignee: Langfang Kokusan Electric Co ltd
Current assignee: Langfang Kokusan Electric Co ltd
Priority date: 2020-09-04
Filing date: 2020-09-04
Publication date: 2021-03-23
Anticipated expiration: 2030-09-04

Abstract

The utility model discloses a motor rotor, which comprises a semi-open cylindrical shell, wherein a plurality of arc-shaped magnets are distributed on the inner side wall of the shell at intervals, the magnets are supported on the inner end surface of the shell by a magnet limiting ring, and the magnets and the magnet limiting ring are surrounded by a magnet protective sleeve and are tightly pressed on the inner side wall of the shell; the magnet protective sleeve is a circular stainless steel plate, more than 1 limiting hole is distributed on the end face of the magnet protective sleeve, more than 1 bulge formed by punching is distributed on the inner end face of the shell, and the number and the distribution position of the limiting holes and the bulges are matched with each other and are mutually nested and fastened. The utility model provides a connected mode between magnetite protective sheath and the casing improves to avoid the deformation or the aversion of magnetite protective sheath, make the cooperation between magnetite, magnetite protective sheath and the casing more accurate.

Description

Motor rotor

Technical Field

The utility model relates to a motor rotor, especially a motor rotor with outer rotor structure.

Background

The motor rotor may be divided into an inner rotor structure and an outer rotor structure according to structure. For the outer rotor structure, the rotor part comprises a rotating shaft, a shell, magnets, a magnet protective sleeve and the like, wherein the rotating shaft and the shell are integrated, and the magnets, the magnet protective sleeve and the like are distributed in the shell; the shell is a magnet assembly carrier and is assembled with the rotating shaft; the magnet provides a magnetic field and is adhered to the inner circumference of the shell; the magnet protective sleeve is bonded on the inner circumference of the magnet and plays a role in protecting the magnet.

The magnet protective sheath is usually made by the corrosion resistant plate of thickness 0.1mm ~ 0.5mm, and in the assembling process, along with the adhesive solidification, the magnet protective sheath often can warp, leads to during operation and stator to produce the friction, needs reprocess in the course of working.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a motor rotor, the connected mode between the magnetite protective sheath in this rotor and the casing has improved to avoid the deformation or the aversion of magnetite protective sheath, make the cooperation between magnetite, magnetite protective sheath and the casing more accurate.

In order to solve the technical problem, the utility model discloses the technical scheme who takes is: a motor rotor comprises a semi-open cylindrical shell, wherein a plurality of arc-shaped magnets are distributed on the inner side wall of the shell at intervals, and the motor rotor is characterized in that the magnets are supported on the inner end surface of the shell through magnet limiting rings, and the magnets and the magnet limiting rings are surrounded by magnet protective sleeves and are tightly pressed on the inner side wall of the shell; the magnet protective sleeve is a circular stainless steel plate, more than 1 limiting hole is distributed on the end face of the magnet protective sleeve, more than 1 bulge formed by punching is distributed on the inner end face of the shell, and the number and the distribution position of the limiting holes and the number and the distribution position of the bulges are matched with each other and are mutually nested and fastened.

Preferably, a plurality of concave pits are distributed on the outer end surface of the shell, and the concave pits correspond to the convex positions. Pit and arch form for stamping on the outer terminal surface of casing, and the arch of formation is joined in marriage and is fastened with the magnetite protective sheath, forms and connects fixed mode to the magnetite protective sheath to the mode of fixing is improved through scribbling the bonding agent to the convection system, has improved joint strength, avoids the deformation or the aversion of magnetite protective sheath.

Preferably, the magnet limiting ring is a support made of a non-metal material, and the thickness of the magnet limiting ring is matched with that of the magnet.

Further preferred to above-mentioned scheme, the magnetite spacing ring includes the main part ring, and the inside wall laminating of main part ring and casing, a terminal surface distribution of main part ring have a plurality of stoppers, and the stopper separates a plurality of magnetite alternate segregation, and another terminal surface distribution arc support column of main part ring, support column support in the interior terminal surface of casing.

Further preferably, the number of the projections, the number of the pits, and the number of the limiting holes are 4, 6, or 8.

Adopt the produced beneficial effect of above-mentioned technical scheme to lie in: the utility model provides a motor rotor, wherein the magnetite protection suit utilizes arch and spacing hole cooperation during timing to fasten, form firm connection, paint the fixed mode of adhesive for the tradition, it is because the closely cooperation of intermetallic, do not receive the influence of other factors such as temperature, the connection effect has been improved, can effectively restrict the removal of magnetite, the binder quantity has been reduced simultaneously, the magnetite protective sheath deformation hidden danger in the binder curing process has also been eliminated, the product reliability is improved, and the cost is reduced. The utility model provides a motor rotor, wherein the magnetite spacing ring carries out spacing support to a plurality of magnetite, makes through the stopper when the assembly and forms interval distribution between a plurality of magnetite, can guarantee that magnetite evenly distributed does not produce phenomenons such as aversion with the casing internal surface.

Drawings

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

FIG. 2 is a schematic view of the magnet protecting case of FIG. 1 without the magnet protecting case;

FIG. 3 is a full sectional view of FIG. 1;

FIG. 4 is an enlarged view of a portion of FIG. 3 at I;

FIG. 5 is a schematic view of a magnet protective cover;

FIG. 6 is a schematic structural view of the housing;

FIG. 7 is a schematic view of a magnet retaining ring;

in the figure: 1. magnetite protective sheath, 2, casing, 3, arch, 4, magnetite, 5, magnetite spacing ring, 6, pit, 11, spacing hole, 21, casing terminal surface, 22, casing lateral wall, 51, main part ring, 52, stopper, 53, support column.

Detailed Description

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

According to fig. 1-7, the present invention relates to a motor rotor, which comprises a housing 2, a plurality of magnets 4, a magnet protecting sleeve 1 and a magnet spacing ring 5, wherein several parts are assembled into a whole to form a semi-open cylindrical structure, the center of which is provided with a shaft hole matched with a rotating shaft to form a motor rotor with an outer rotor structure, and the shape of the motor rotor is as shown in fig. 1.

The structure and arrangement of the magnets 4 can be seen in fig. 2 and 3, a plurality of arc-shaped magnets 4 are distributed on the inner side wall 22 of the shell 2 at intervals, and the plurality of arc-shaped magnets 4 are supported on the inner end surface 21 of the shell 2 by the magnet spacing ring 5. In order to advance fixedly to the position of magnetite 4 to guarantee to set up for the interval between a plurality of magnetite 4, need carry out spacing fixed to magnetite 4, consequently utilize magnetite protective sheath 1 to surround magnetite 4 and magnetite spacing ring 5, and compress tightly in the inside wall 22 of casing 2 to it, magnetite protective sheath 1 chooses for use ring shape corrosion resistant plate, and its structure is similar with casing 2.

As can be seen in attached figures 4 and 5, more than 1 limiting hole 11 is distributed on the end face of the magnet protective sleeve 1, more than 1 protrusion 3 formed by punching is distributed on the inner end face 21 of the shell 2, the number and the distribution positions of the limiting holes 11 and the protrusions 3 are matched with each other and are mutually nested and fastened, and the protrusions 3 are pressed down by using a special tool to fix the magnet protective sleeve 1.

In this embodiment, in fig. 6, the housing 2 is processed by a punch, and the plurality of concave pits 6 are punched on the outer end surface, so that the protrusions 3 are formed at corresponding positions on the inner end surface.

In this embodiment, in fig. 7, the magnet retaining ring 5 is a support made of a non-metal material, the thickness of the magnet retaining ring is matched with the thickness of the magnet 4, the magnet retaining ring 5 includes a main body ring 51, the main body ring 51 is attached to the inner side wall 22 of the housing 2, a plurality of limiting blocks 52 are distributed on one end surface of the main body ring 51, the limiting blocks 52 separate the magnets 4 from each other, an arc-shaped supporting column 53 is distributed on the other end surface of the main body ring 51, and the supporting column 53 is supported on the inner end surface 21 of the housing. During assembly, the magnets 4 are adsorbed on the inner surface of the shell 2 and are separated by the limiting blocks 53, the supporting columns 53 adjust the axial positions of the magnets 4, and finally the magnets 4 are pressed and fixed.

In this embodiment, through punching out 6 arch 3 on the casing, correspond at 1 lower limb of magnetite protective sheath and open limiting hole 11, magnetite protective sheath 1 assembles the back, pushes down protruding 3 on 2 with the help of the frock with the help of the magnetite protective sheath 11 is fixed. The improvement of this structure no longer paints the binder when the assembly of magnetite protective sheath 1, has reduced the binder quantity, has also eliminated the magnetite protective sheath deformation hidden danger in the binder curing process, has improved product reliability. With the development of manufacturing technology, the design structure and the processing technology of the product are obviously improved, and the processing cost is reduced while the reliability of the product is improved.

Claims

1. A motor rotor comprises a semi-open cylindrical shell (2), wherein a plurality of arc-shaped magnets (4) are distributed on the inner side wall (22) of the shell (2) at intervals, and the motor rotor is characterized in that the magnets (4) are supported on the inner end surface (21) of the shell (2) through magnet limiting rings (5), and the magnets (4) and the magnet limiting rings (5) are surrounded by magnet protective sleeves (1) and are tightly pressed on the inner side wall (22) of the shell (2); the magnet protection sleeve (1) is a circular stainless steel plate, more than 1 limiting hole (11) is distributed on the end face of the magnet protection sleeve (1), more than 1 bulge (3) formed by punching are distributed on the inner end face (21) of the shell (2), and the number and the distribution positions of the limiting hole (11) and the bulge (3) are matched with each other and are mutually nested and fastened.

2. A motor rotor according to claim 1, characterized in that a plurality of dimples (6) are distributed on the outer end surface of the housing (2), and the dimples (6) correspond to the protrusions (3) in position.

3. A motor rotor according to claim 1, characterized in that the magnet retaining ring (5) is a support body made of non-metallic material and has a thickness matching the thickness of the magnet (4).

4. The motor rotor as claimed in claim 3, wherein the magnet retaining ring (5) comprises a main body ring (51), the main body ring (51) is attached to the inner side wall (22) of the housing (2), a plurality of retaining blocks (52) are distributed on one end surface of the main body ring (51), the plurality of magnets (4) are separated from each other by the retaining blocks (52), an arc-shaped supporting column (53) is distributed on the other end surface of the main body ring (51), and the supporting column (53) is supported on the inner end surface (21) of the housing (2).

5. A motor rotor according to claim 1 or 2, characterised in that the number of projections (3), recesses (6) and limiting holes (11) is 4, 6 or 8.