CN219227307U

CN219227307U - Outer rotor motor magnet steel fixed knot constructs

Info

Publication number: CN219227307U
Application number: CN202320062131.7U
Authority: CN
Inventors: 彭三文
Original assignee: Green Intelligence Electrical Equipment Co ltd Nanhai District Foshan City
Current assignee: Green Intelligence Electrical Equipment Co ltd Nanhai District Foshan City
Priority date: 2023-01-10
Filing date: 2023-01-10
Publication date: 2023-06-20
Anticipated expiration: 2033-01-10

Abstract

The utility model provides a magnetic steel fixing structure of an outer rotor motor, which comprises a rotor shell, a magnetic steel fixing clamp, a rotor bracket and magnetic steel, wherein the rotor shell is provided with a plurality of magnetic steel fixing holes; the rotor bracket is provided with a second clamping groove and a spacing block; the magnetic steel fixing clamp comprises a connecting ring, a first clamping groove and an elastically deformable separation sheet; the magnetic steel is adaptively arranged in the first clamping groove and the second clamping groove, and the magnetic steel is clamped and arranged through elastic deformation of the separation sheet; the magnetic steel fixing clamp is used for clamping and installing magnetic steel, and the magnetic steel is installed in a mode of mechanical fixing instead of an adhesive fixing mode, so that the magnetic steel is firmly installed and is not easy to fall off, and the reliability of the motor is improved; a limit rib is arranged on one side of the separation sheet; the magnetic steel and the separation sheet are more tightly matched through the limit ribs.

Description

Outer rotor motor magnet steel fixed knot constructs

Technical Field

The utility model relates to the technical field of rotor fixing structures, in particular to an outer rotor motor magnetic steel fixing structure.

Background

An external rotor motor is a power device widely applied to the fields of household appliances, electric tools and the like. Compared with the traditional motor, the outer rotor motor has the characteristics of compact structure, convenient installation, reliable operation, low noise, energy conservation, high efficiency and the like.

In the traditional process technology, the magnetic steel of the outer rotor motor is mainly installed and fixed in a glue bonding mode. Because the firmness of the magnetic steel is influenced by glue selection and glue coating technology, the magnetic steel is easy to fall off in the use process of part of the outer rotor motor, and the motor cannot work normally.

In the using process of the outer rotor motor, torque changes generated by load changes are transmitted to the magnetic steel and the rotor shell through the shaft, so that the glue bears shear strain, meanwhile, the stress of the glue is reduced due to the changes of ambient temperature and humidity, the bonding strength of the glue is reduced when the outer rotor motor is used for a long time, and the magnetic steel is caused to fall off.

Disclosure of Invention

The utility model aims to solve the defects in the prior art, and provides a magnetic steel fixing structure of an outer rotor motor.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

a magnetic steel fixing structure of an outer rotor motor comprises a rotor shell, a magnetic steel fixing clamp, a rotor bracket and magnetic steel; the magnetic steel fixing clamp is adaptively arranged above the rotor shell and comprises a connecting ring, a first clamping groove and an elastically deformable separation sheet; the first clamping groove and the separation sheet are arranged on the inner wall of the connecting ring at intervals; the rotor bracket is adaptively arranged below the rotor shell, and a second clamping groove and a spacing block are arranged on the rotor bracket; the second clamping groove and the spacing block are arranged at intervals; a rotating shaft is also arranged at the center of the rotor bracket in an adaptive manner; the first clamping groove and the second clamping groove are vertically corresponding in position, and the magnetic steel is adaptively arranged in the first clamping groove and the second clamping groove and is clamped and arranged through elastic deformation of the separation sheet; the rotor shell is provided with a cavity between the two magnetic steels; the separation sheet and the separation block are positioned in the cavity; one side of the separation sheet is provided with a limit rib.

The separation sheet comprises a reinforcing rib and a groove; the groove is positioned between the two reinforcing ribs; the limit rib is located at the front end of the side wall of one of the reinforcing ribs.

The reinforcing ribs are gradually narrowed from the inner wall of the connecting ring to the circle center of the connecting ring, and the section of the reinforcing ribs is trapezoid.

The shape of the bullnose of the magnetic steel is matched with the shape of the fillet of the limiting rib, and the magnetic steel is limited through the limiting rib.

The shape of the side wall of the magnetic steel is matched with the shape of the side wall of the reinforcing rib, so that the two are installed more tightly.

The inner circle shape of the connecting ring is matched with the outer circle shape of the back surface of the magnetic steel, so that the connecting ring and the magnetic steel are installed more tightly.

The shape of the side wall of the second clamping groove is matched with that of the side wall of the magnetic steel, so that the second clamping groove and the magnetic steel are installed more tightly.

The shape of the bottom surface of the magnetic steel is matched with the shape of the inner concave surface of the second clamping groove, and the bottom surface of the magnetic steel and the shape of the inner concave surface of the second clamping groove are mutually abutted.

The connecting ring is provided with a boss, the rotor shell is provided with a positioning groove which is matched with the boss, and the magnetic steel fixing clamp is positioned and installed on the rotor shell through the matching of the boss and the positioning groove.

The utility model has the following beneficial effects: 1. the magnetic steel fixing clamp is used for clamping and installing the magnetic steel, and the magnetic steel is installed in a mode of mechanical fixing instead of an adhesive fixing mode, so that the magnetic steel is firmly installed and is not easy to fall off, and the reliability of the motor is improved; 2. the separation sheet is arranged, the separation sheet is reasonably matched with the magnetic steel gap, the circumferential direction of the magnetic steel is precisely positioned, the influence of the circumferential direction positioning difference of the magnetic steel on the motor performance is avoided, the structure adopts an integrated structure, the structure is simple, the cost is low, the assembly is simple, the curing time and the curing temperature of the adhesive are not influenced, and the assembly efficiency is high; 3. the limiting ribs are arranged, and the magnetic steel and the separating sheets are more tightly matched with each other in installation through the limiting ribs.

Drawings

Fig. 1 is a perspective view of the overall structure of an embodiment of the present utility model.

Fig. 2 is a partial enlarged view of a magnetic steel fixing clip according to an embodiment of the present utility model.

Fig. 3 is a diagram showing the mounting relationship between the magnetic steel and the magnetic steel fixing clip and the rotor bracket according to the embodiment of the present utility model.

Fig. 4 is an overall exploded view of an embodiment of the present utility model.

Reference numerals in the drawings: rotor housing 1, cavity 11, constant head tank 12, magnet steel fixation clamp 2, first double-layered groove 21, go-between 22, boss 22.1, separation piece 23, strengthening rib 23.1, recess 23.2, spacing muscle 24, rotor support 3, second double-layered groove 31, spacer 32, magnet steel 4, pivot 5.

Detailed Description

As shown in fig. 1-4, an outer rotor motor magnetic steel fixing structure comprises a rotor shell 1, a magnetic steel fixing clamp 2, a rotor bracket 3 and magnetic steel 4.

As shown in fig. 2 and 4, the magnetic steel fixing clip 2 is fixedly installed above the rotor housing 1, and the fixing manner may be gluing, welding, or the like. Specifically, the magnetic steel fixing clip 2 includes a connecting ring 22, a first clip groove 21 and an elastically deformable separating sheet 23. The first clamping groove 21 and the separating sheet 23 are arranged at intervals and are integrally formed with the connecting ring and fixed on the inner wall of the connecting ring 22.

As shown in fig. 4, the rotor support 3 is fixedly mounted below the rotor housing 1, and may be fixed by gluing, welding, or the like. Specifically, the rotor bracket 3 is provided with a second clamping groove 31 and a spacing block 32. The second clamping groove 31 and the spacing block 32 are arranged at intervals and fixedly connected with the rotor bracket 3. The center of the rotor support 3 is also provided with a rotating shaft 5, and the rotating shaft 5 penetrates through the center of the rotor support 3 and is fixed through interference fit riveting.

As shown in fig. 1 and 3, the positions of the first clamping groove 21 and the second clamping groove 31 are vertically corresponding, and the magnetic steel 4 is adaptively installed in the first clamping groove 21 and the second clamping groove 31, and the magnetic steel 4 is clamped and installed by elastic deformation of the separation sheet 23.

The rotor housing 1 is provided with a cavity 11 between the two magnetic steels 4, and the separation sheet 23 and the separation block 32 are positioned in the cavity 11 and correspond to each other in position up and down.

Specifically, as shown in fig. 2, the separating sheet 23 is made of a non-metal material, and includes a reinforcing rib 23.1 and a groove 23.2. Said groove 23.2 is located between two of said ribs 23.1. When the magnetic steel 4 is installed in the first clamping groove 21, the reinforcing ribs 23.1 are extruded by the magnetic steel 4, so that the magnetic steel 4 is convenient to install due to inward elastic deformation, and the installation fit between the reinforcing ribs 23.1 is tighter due to outward elastic stretching force of the reinforcing ribs.

Further, a limit rib 24 is provided on one side of the separation sheet 23. The limiting rib 24 is located at the front end of the side wall of one of the reinforcing ribs 23.1 and is fixedly connected with the reinforcing rib 23.1.

As shown in fig. 1-3, the reinforcing ribs 23.1 gradually narrow from the inner wall of the connecting ring 22 to the center of the connecting ring 22, and the cross section of the reinforcing ribs is in a trapezoid shape. The installation of the magnetic steel 4 is facilitated.

The bullnose shape of the magnetic steel 4 is matched with the fillet shape of the limiting rib 24, and the limiting rib 24 limits the magnetic steel 4.

The shape of the side wall of the magnetic steel 4 is matched with the shape of the side wall of the reinforcing rib 23.1, so that the two are installed more tightly.

The inner circle shape of the connecting ring 22 is matched with the outer circle shape of the back surface of the magnetic steel 4, so that the two are installed more tightly.

The shape of the side wall of the second clamping groove 31 is matched with the shape of the side wall of the magnetic steel 4, so that the two are installed more tightly.

The shape of the bottom surface of the magnetic steel 4 is matched with the shape of the concave surface of the second clamping groove 31, and the two are mutually abutted.

As shown in fig. 1 and 4, in order to make the installation of the magnetic steel fixing clip 2 and the rotor housing 1 more stable, the connection is tighter and the connection is not easy to loose, a boss 22.1 is arranged on the connection ring 22, a positioning groove 12 which is matched with the boss 22.1 is arranged on the rotor housing 1, and the magnetic steel fixing clip 2 is positioned and installed on the rotor housing 1 through the matching of the boss 22.1 and the positioning groove 12.

Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present utility model, and although the present utility model has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the technical solutions described in the foregoing embodiments, or equivalents may be substituted for some of the technical features thereof, and all technical solutions which may be obtained by logic analysis, reasoning or limited experiments based on the prior art according to the inventive concept should be within the scope of protection defined by the claims.

Claims

1. The magnetic steel fixing structure of the outer rotor motor is characterized by comprising a rotor shell (1), a magnetic steel fixing clamp (2), a rotor bracket (3) and magnetic steel (4);

the magnetic steel fixing clamp (2) is adaptively arranged above the rotor shell (1), and the magnetic steel fixing clamp (2) comprises a connecting ring (22), a first clamping groove (21) and an elastically deformable separation sheet (23); the first clamping groove (21) and the separation sheet (23) are arranged on the inner wall of the connecting ring (22) at intervals;

the rotor support (3) is adaptively arranged below the rotor shell (1), and a second clamping groove (31) and a spacing block (32) are arranged on the rotor support (3); the second clamping groove (31) and the spacing block (32) are arranged at intervals; a rotating shaft (5) is also arranged at the center of the rotor bracket (3) in an adaptive manner;

the positions of the first clamping groove (21) and the second clamping groove (31) are vertically corresponding, the magnetic steel (4) is adaptively arranged in the first clamping groove (21) and the second clamping groove (31), and the magnetic steel (4) is clamped and arranged through elastic deformation of the separation sheet (23);

a cavity (11) is arranged between the two magnetic steels (4) of the rotor shell (1); the separation sheet (23) and the separation block (32) are positioned in the cavity (11); one side of the separation sheet (23) is provided with a limit rib (24).

2. The outer rotor motor magnetic steel fixing structure according to claim 1, wherein the separation sheet (23) comprises reinforcing ribs (23.1) and grooves (23.2), the grooves (23.2) are located between the two reinforcing ribs (23.1), and the limit rib (24) is located at the front end of the side wall of one of the reinforcing ribs (23.1).

3. The outer rotor motor magnetic steel fixing structure according to claim 2, wherein the reinforcing ribs (23.1) are gradually narrowed from the inner wall of the connecting ring (22) to the center of the connecting ring (22), and the cross section of the reinforcing ribs is in a trapezoid shape.

4. The outer rotor motor magnetic steel fixing structure according to claim 1, wherein the fillet shape of the magnetic steel (4) is matched with the fillet shape of the limit rib (24), and the limit rib (24) is used for limiting the magnetic steel (4).

5. The outer rotor motor magnetic steel fixing structure according to claim 2, wherein the shape of the side wall of the magnetic steel (4) is matched with the shape of the side wall of the reinforcing rib (23.1), so that the two are installed more tightly.

6. The outer rotor motor magnetic steel fixing structure according to claim 1, wherein the inner circle shape of the connecting ring (22) is matched with the back outer circle shape of the magnetic steel (4) so that the two are installed more tightly.

7. The magnetic steel fixing structure of the outer rotor motor according to claim 1, wherein the shape of the side wall of the second clamping groove (31) is matched with the shape of the side wall of the magnetic steel (4), so that the two are installed more tightly.

8. The outer rotor motor magnetic steel fixing structure according to claim 1, wherein the shape of the bottom surface of the magnetic steel (4) is matched with the shape of the inner concave surface of the second clamping groove (31), and the two are mutually abutted.

9. The outer rotor motor magnetic steel fixing structure according to claim 1, wherein a boss (22.1) is arranged on the connecting ring (22), a positioning groove (12) which is matched with the boss (22.1) is arranged on the rotor shell (1), and the magnetic steel fixing clamp (2) is installed on the rotor shell (1) through the matching positioning of the boss (22.1) and the positioning groove (12).