CN220711220U

CN220711220U - Outer rotor shell assembly

Info

Publication number: CN220711220U
Application number: CN202322436996.8U
Authority: CN
Inventors: 张经纬; 王连城; 王群
Original assignee: Jiangyin Tuojin Motor Co ltd
Current assignee: Jiangyin Tuojin Motor Co ltd
Priority date: 2023-09-07
Filing date: 2023-09-07
Publication date: 2024-04-02
Anticipated expiration: 2033-09-07

Abstract

The utility model relates to an integrated outer rotor shell component, which comprises an iron core and a shell; the shell is die-cast on the outer wall of the iron core; limiting blocks are inwards extended on the inner walls of the two ends of the shell, and are positioned at the top of the iron core. The utility model has the advantages that: the shell of the shell is integrally formed through an aluminum casting process, the steps of an original iron core and a shell hot jacket are omitted, and the gap between the iron core and the shell is reduced, so that the heat dissipation effect in the motor is accelerated, the overall diameter of the motor is greatly reduced, and the assembly space inside the fan is saved.

Description

Outer rotor shell assembly

Technical Field

The utility model relates to the field of motor assembly, in particular to an integrated outer rotor shell component.

Background

In the field of outer rotor motor assembly, a shell is heated firstly through a hot jacket process, then an iron core is sleeved into the shell, and the outer wall of the iron core is tightly attached to a connecting block of the shell according to the principle of thermal expansion and cold contraction. The outer rotor shell structure adopting the hot jacket can solve the problem that the gap between the shell and the iron core is large, and the heat transfer is slower because the contact area between the shell and the iron core is small and the iron core is only contacted through the connecting block on the inner wall of the shell, so that the problem of slow heat dissipation exists. And because there is great clearance between shell and the iron core, directly increased the holistic size of motor, wasted the installation space in the fan.

Disclosure of Invention

The utility model aims to provide an integrated outer rotor shell assembly, which can reduce the clearance between a rotor and a shell and reduce the overall size of a motor.

In order to achieve the above-mentioned purpose, the utility model provides an integrated outer rotor chassis assembly, comprising an iron core and a chassis; the shell is die-cast on the outer wall of the iron core;

limiting blocks extend inwards on the inner walls of the two ends of the shell, and the limiting blocks are located at the top of the iron core.

Preferably, the limiting blocks are a plurality of dispersing limiting blocks, and the dispersing limiting blocks are distributed on the inner wall of the shell in a ring-shaped array mode.

Further, the limiting block is provided with a connecting hole.

As a further improvement of the utility model, the outer wall of the iron core is provided with a positioning groove, the inner wall of the shell is cast with a positioning strip, and the positioning strip is embedded in the positioning groove.

According to the integrated outer rotor shell assembly, the shell is connected to the outer wall of the iron core through the cast aluminum process, so that the iron core is in complete contact with the shell, and compared with the existing rotor shell process, the heat dissipation effect is enhanced, and the gap between the shell and the iron core is greatly reduced.

Compared with the prior art, the integrated outer rotor shell assembly has the advantages that:

the casing is integrally formed through an aluminum casting process, the steps of an original iron core and casing hot jacket are omitted, and the gap between the iron core and the casing is reduced, so that the heat dissipation effect in the motor is accelerated, the overall diameter of the motor is greatly reduced, and the assembly space inside the fan is saved.

Drawings

FIG. 1 is a schematic view of an integrated outer rotor housing assembly of the present utility model;

FIG. 2 is a top view of an integrated outer rotor housing assembly;

FIG. 3 is a schematic diagram of a prior art shrink fit rotor housing assembly;

fig. 4 is a schematic diagram of a core structure;

fig. 5 is a schematic view of a positioning strip structure.

Detailed Description

The following describes the embodiments of the present utility model in further detail with reference to the drawings.

As shown in fig. 1-2, the integrated outer rotor casing assembly of the present utility model comprises an iron core 1 and a casing 2; the shell 2 is die-cast on the outer wall of the iron core 1;

limiting blocks 3 extend inwards from the inner walls of the two ends of the shell 2, and the limiting blocks 3 are positioned at the top of the iron core 1; the limiting blocks 3 at the two ends are tightly pressed at the two ends of the iron core 1, so that the two ends of the iron core 1 can be clamped, and the connection between the shell 2 and the iron core 1 is further reinforced.

The limiting blocks 3 are a plurality of dispersing limiting blocks which are distributed on the inner wall of the shell 2 in a ring-shaped array mode. Because the shell 2 and the limiting block 3 are integrally formed through cast aluminum, compared with the annular integral limiting block 3, the dispersing limiting block can reduce the use amount of aluminum materials while ensuring reinforcement connection.

The limiting block 3 is provided with a connecting hole 4 which can be used for assembling a subsequent motor. The stopper 3 both can play the effect of location iron core 1, also can play the effect of equipment, and connecting hole 4 is offered in the top of iron core 1 through stopper 3, has further reduced the size of the casing 2.

As shown in fig. 3, the original rotor casing is thermally expanded by heating the casing, then the iron core 1 is sleeved in the casing 2, the long connecting block 5 on the inner wall of the casing 2 is tightly pressed on the outer ring of the iron core 1, a larger gap is generated between the iron core 1 and the casing 2, the contact area is too small, heat dissipation is affected, and the overall diameter of the casing 2 is enlarged. And through the casing 2 of aluminium casting integrated into one piece, the outer wall of iron core 1 is hugged closely to the inner wall of casing 2, can reduce the interval of casing 2 and iron core 1, has significantly reduced the diameter of casing 2 to the holistic size of external rotor casing has been reduced. And the shell 2 is closely contacted with the iron core 1, so that the heat dissipation effect is enhanced.

As shown in fig. 4-5, the outer wall of the iron core 1 is provided with a positioning groove 11, the inner wall of the shell 2 is cast with a positioning strip 21, and the positioning strip 21 is embedded in the positioning groove 11. When the shell 2 is cast, the positioning strips 21 are embedded and clamped in the positioning grooves 11, so that the connection strength of the shell 2 and the iron core 1 is enhanced.

According to the integrated outer rotor shell assembly, the shell 2 is connected to the outer wall of the iron core 1 through the cast aluminum process, so that the iron core 1 is in full contact with the shell 2, and compared with the existing rotor shell process, the integrated outer rotor shell assembly has the advantages that the heat dissipation effect is enhanced, and the gap between the shell 2 and the iron core 1 is greatly reduced.

While the preferred embodiments of the present utility model have been illustrated and described, the present utility model is not limited to the embodiments described above, and various equivalent modifications and substitutions can be made by those skilled in the art without departing from the spirit of the present utility model, and these are intended to be included in the scope of the present utility model as defined in the appended claims.

Claims

1. The integrated outer rotor shell component comprises an iron core and a shell; the die-casting machine is characterized in that the shell is die-cast on the outer wall of the iron core;

2. The integrated outer rotor housing assembly of claim 1, wherein the stop blocks are a plurality of discrete stop blocks arranged in an annular array on an inner wall of the housing.

3. The integrated outer rotor housing assembly of claim 1 or 2, wherein the stopper is provided with a connection hole.

4. The integrated outer rotor housing assembly of claim 1, wherein the outer wall of the core is provided with a locating slot, and the inner wall of the housing is cast with a locating strip, the locating strip being embedded in the locating slot.