CN217904146U

CN217904146U - Outer rotor fan motor

Info

Publication number: CN217904146U
Application number: CN202221854065.9U
Authority: CN
Inventors: 秦晓春
Original assignee: Jiangsu Changjin Intelligent Electric Appliance Co ltd
Current assignee: Jiangsu Changjin Intelligent Electric Appliance Co ltd
Priority date: 2022-07-19
Filing date: 2022-07-19
Publication date: 2022-11-25
Anticipated expiration: 2032-07-19

Abstract

The utility model belongs to the technical field of the motor technology and specifically relates to an external rotor fan motor, overcome the inconvenient or short problem of motor bearing life of the part processing of this kind of current motor, the base has, the base includes two parts of bottom plate and core section of thick bamboo, the stator of motor is fixed on the core section of thick bamboo, the iron core clearance cover of rotor is on the iron core of stator, the core section of thick bamboo is stretched into in the pivot of rotor, the bottom plate is used for the support to the core section of thick bamboo, the bottom plate and the core section of thick bamboo of base are the components of a whole that can function independently structure, the bottom plate is the steel sheet formed part, the core section of thick bamboo is cast aluminium spare, the core section of thick bamboo is by the bolt fastening on the bottom plate, two bearings of supporting shaft are installed in the core section of thick bamboo, it is protruding to be equipped with the location on the terminal surface of bottom plate laminating at the core section of thick bamboo, it has the screw hole to distribute in the outer lane of core section of thick bamboo and bottom plate laminating department to fix, the bolt of using passes the through-hole and twists on the screw hole.

Description

External rotor fan motor

Technical Field

The utility model belongs to the technical field of the motor technique and specifically relates to an external rotor fan motor.

Background

The electronic and electrical equipment box mostly needs to be provided with a heat radiation fan, the fan generally uses an external rotor motor, as shown in figure 1, the motor is provided with a base 1', a stator 2' is fixed on the base 1', a rotating shaft and a rotor iron core are fixed to form a rotor 3', the rotor iron core is sleeved on the stator iron core in a clearance way, the base 1' is provided with a bottom plate 1-1' and a core barrel 1-2' which are integrated, the rotating shaft extends into the core barrel 1-2', one bearing for supporting the rotating shaft is arranged in the core barrel 1-2' and the other bearing is arranged in a cast aluminum end cover of the stator iron core, the stator iron core is fixed outside the core barrel 1-2', a blade disc of the fan is fixed on the rotating shaft, and the fan can be fixed by fixing the motor base 1 '.

The existing base 1' of the fan is an integrated aluminum casting, a core cylinder 1-2' and a bottom plate 1-1' are integrated, the reason for designing the structure is that from the perspective of convenient fixing and supporting, the base 1' is fixed, namely the stator 2' is fixed, and the rotor 3' is stably supported, but the structure also has the defect that the manufacturability of the base is poor, the integrated core cylinder 1-2' and the bottom plate 1-1' are a combination of a disc and a cylinder, the probability of waste occurrence in the aluminum casting process is high, the defect is mainly caused by the fact that when a bearing hole is lathed on the inner wall of the core cylinder 1-2', a lathe claw needs to be clamped on the outer ring of the bottom plate 1-1' when a combination part of the disc and the cylinder and the edges of the disc and the cylinder, the main reason of the defect is that the flow of a casting liquid and the cooling stress of a casting are insufficient, in addition, when the bearing hole is lathed on the inner wall of the core cylinder 1-2', the lathe claw needs to be clamped on the outer ring of the bottom plate 1-1', the clamping stability of the bottom plate 1' is not good, the outer ring, the machining precision of the bearing hole is also influenced by the machining accuracy of a certain reason that the outer ring of the bearing hole, and the bearing is improved, and the bearing structure of the bearing is designed to reduce the accuracy of the rotating shaft which is improved and the bearing which is improved and the rotating shaft which is capable of forming two rotating shaft which supports the bearing and the bearing at the upper end cover of the core cylinder.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: the outer rotor fan motor solves the problems that the existing motor is inconvenient in part machining or short in service life of a motor bearing.

The utility model provides a technical scheme that its technical problem adopted is: the utility model provides an external rotor fan motor, has the base, the base includes two parts of bottom plate and core section of thick bamboo, and the stator of motor is fixed on the core section of thick bamboo, and the iron core clearance cover of rotor is on the iron core of stator, and the pivot of rotor stretches into the core section of thick bamboo, the bottom plate is used for the support to the core section of thick bamboo, the bottom plate and the core section of thick bamboo of base are the components of a whole that can function independently structure, the bottom plate is the steel sheet formed part, the core section of thick bamboo is cast aluminium spare, the core section of thick bamboo is fixed on the bottom plate by the bolt, and two bearings that support the pivot are installed in the core section of thick bamboo.

Specifically, in order to facilitate the positioning of the core barrel on the bottom plate, positioning protrusions are arranged on the end face, attached to the bottom plate, of the core barrel, the positioning protrusions extend into the positioning holes in the bottom plate, and the number of the positioning protrusions is at least two.

Since the coil of the stator has the lead-out wire which has a suitable position area on the circumference with respect to the base plate, it is necessary to determine the circumferential position relationship between the core barrel and the base plate, and the positioning projections are distributed unequally on the circumference of the end face of the core barrel, so that the core barrel is easily positioned in the circumferential direction.

In order to facilitate processing, the outer rings of the two bearings supporting the rotating shaft are tightly matched in the casting blank holes of the core barrel, the bearings can be directly extruded into the holes of the casting blank of the core barrel according to the relatively soft characteristic of the cast aluminum material, and the bearing holes of the core barrel do not need to be machined.

Specifically, threaded holes are distributed in the outer ring of the joint of the core barrel and the bottom plate, and bolts for fixing penetrate through holes in the bottom plate and are screwed in the threaded holes.

The utility model has the advantages that: the utility model discloses make the form of components of a whole that can function independently with external rotor fan motor base's core section of thick bamboo part and bottom plate part, compare the base processing that prior art made the motor convenient, bearing long service life, moreover, make full use of the bottom plate only play the characteristic of fixed mounting effect on the motor, can optimize the performance of product through improving core section of thick bamboo processing cost, reduction bottom plate processing cost.

Drawings

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

Fig. 1 is a schematic structural view of a conventional external rotor motor;

FIG. 2 is a schematic structural view of the present invention;

fig. 3 is a front view of a core barrel of the motor of the present invention;

FIG. 4 is a top view of FIG. 3;

fig. 5 is a schematic view of the base composed of the core barrel and the bottom plate of the present invention.

In FIG. 1: 1', a base, 1-1', a bottom plate, 1-2', a core cylinder, 2', a stator, 3' and a rotor;

in fig. 2: 1. the core barrel comprises a base 1-1, a bottom plate 1-2, a core barrel 1-2-1, a positioning protrusion 1-2-2 and a threaded hole;

2. a stator;

3. and a rotor.

Detailed Description

The invention will now be described in further detail with reference to the accompanying drawings, which are simplified and schematic illustrations of the basic structure of the invention, and preferred embodiments, and which therefore show only the elements relevant to the invention.

An external rotor fan motor as shown in fig. 2 comprises a base 1, the base 1 comprises a bottom plate 1-1 and a core barrel 1-2, a stator 2 of the motor is fixed on the core barrel 1-2, an iron core of a rotor 3 is sleeved on an iron core of the stator 2 in a clearance manner, a rotating shaft of the rotor 3 extends into the core barrel 1-2, the bottom plate 1-1 is used for supporting the core barrel 1-2, the bottom plate 1-1 and the core barrel 1-2 of the base 1 are of a split structure, the bottom plate 1-1 is a steel plate forming part, the steel plate forming part is a part obtained by stamping and drawing a steel plate through a die, the core barrel 1-2 is an aluminum casting part, the core barrel 1-2 is fixed on the bottom plate 1-1 through bolts, the core barrel 1-2 is vertically arranged on the bottom plate 1-1, as shown in fig. 3 to 5, three positioning protrusions 1-2-1 are circumferentially distributed on the end face of the core barrel 1-2, which is jointed with the bottom plate 1-1, the positioning protrusions 1-1 extend into the bottom plate 1-1, and three threaded holes for screwing the bolt holes 1-2 are distributed on the outer ring 1-2.

Two bearings for supporting the rotating shaft are arranged in the core cylinder 1-2, and the outer rings of the two bearings for supporting the rotating shaft are tightly matched in the casting blank holes of the core cylinder 1-2.

The positioning protrusions 1-2-1 are equally distributed on the circumference of the end face of the core barrel 1-2; the core barrel 1-2 is provided with a determined corner position relation on the bottom plate 1-1, so that the leading-out wire of the motor has a determined position relation relative to the bottom plate 1-1, and the motor is conveniently and fixedly installed.

While the foregoing description describes only certain embodiments of the invention, it is not intended to limit the invention to the particular forms disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.

Claims

1. The utility model provides an external rotor fan motor, has base (1), base (1) includes two parts of bottom plate (1-1) and core section of thick bamboo (1-2), and stator (2) of motor are fixed on core section of thick bamboo (1-2), and the iron core clearance cover of rotor (3) is on the iron core of stator (2), and the pivot of rotor (3) stretches into core section of thick bamboo (1-2), bottom plate (1-1) are used for the support to core section of thick bamboo (1-2), characterized by: the base plate (1-1) and the core barrel (1-2) of the base (1) are of a split structure, the base plate (1-1) is a steel plate forming part, the core barrel (1-2) is an aluminum casting, the core barrel (1-2) is fixed on the base plate (1-1) through bolts, and two bearings for supporting a rotating shaft are installed in the core barrel (1-2).

2. The external rotor fan motor of claim 1, wherein: the end face, attached to the bottom plate (1-1), of the core barrel (1-2) is provided with positioning protrusions (1-2-1), the positioning protrusions (1-2-1) extend into positioning holes in the bottom plate (1-1), and the number of the positioning protrusions (1-2-1) is at least two.

3. The external rotor fan motor of claim 2, wherein: the positioning protrusions (1-2-1) are distributed on the circumference of the end face of the core barrel (1-2) in an unequal manner.

4. The external rotor fan motor of claim 1, wherein: the outer rings of the two bearings for supporting the rotating shaft are tightly matched in the casting blank holes of the core barrel (1-2).

5. The external rotor fan motor of claim 1, wherein: threaded holes (1-2-2) are distributed on the outer ring of the joint of the core barrel (1-2) and the bottom plate (1-1), and bolts for fixing penetrate through holes in the bottom plate (1-1) and are screwed on the threaded holes (1-2-2).