CN217741430U

CN217741430U - Self-heat-dissipation outer rotor fan motor

Info

Publication number: CN217741430U
Application number: CN202221866858.2U
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: 2022-11-04
Anticipated expiration: 2032-07-19

Abstract

The utility model belongs to the technical field of the motor technology and specifically relates to a from external rotor fan motor that dispels heat, overcome the problem that the inside heat dissipation of current this kind of motor is not good and motor bearing life is short, the base has, stator and rotor, the base includes two parts of bottom plate and core section of thick bamboo, the iron core of stator 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, cast aluminium end links integrative with the iron core have on the rotor, the rotor is close to circumference arrangement on the outer terminal surface of the cast aluminium end links of bottom plate mutually and has helical blade, circumference arrangement has the ventilation hole on the bottom plate, radial outflow through helical blade after the inside refrigerated air current of motor flows in by the ventilation hole axial, for making base processing convenience, optimize the assembly structure of motor simultaneously, the bottom plate of base and core section of thick bamboo are the components of a whole that can function independently structure, the bottom plate is the steel sheet forming 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, two bearings that support the pivot are installed in the core section of thick bamboo.

Description

Self-heat-dissipation outer rotor fan motor

Technical Field

The utility model belongs to the technical field of the motor technique and specifically relates to a from heat dissipation external rotor fan motor.

Background

The fan using the external rotor motor is more suitable for being installed on a box body of electronic and electrical equipment to ventilate and radiate heat of heating elements in the box body, the attached figure 1 shows a structure of the existing external rotor motor, 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', a gap of the rotor iron core is sleeved on the stator iron core, 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 fixing of the motor base 1' can be realized.

The fan generally needs to work for a long time, and some fans even work continuously for 24 hours, the motor is cooled by the ceaseless air flow around the fan, the motor is not easy to overheat and damage, although the problem that the heat inside the existing external rotor motor is slow in heat dissipation is still caused, the heat comes from a stator core, a stator coil, a rotating bearing and the like, the assembly relation and the assembly precision among the stator core, a core barrel, the bearing and a rotating shaft are tested by the long-time high temperature inside the motor, and the quality of the bearing is also tested, so that the reduction of the temperature inside the external rotor motor is beneficial to prolonging the service life of the motor.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: the utility model provides an external rotor fan motor, overcome the current problem that the inside heat dissipation of this kind of motor is not good and motor bearing life is short.

The utility model provides a technical scheme that its technical problem adopted is: the utility model provides a from external rotor fan motor that looses, has base, stator and rotor, the base includes two parts of bottom plate and core section of thick bamboo, and the iron core of stator 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 has the cast aluminium end link of casting an organic whole with the iron core on, and the rotor is close to the circumference arrangement on the outer terminal surface of the cast aluminium end link of bottom plate mutually and has helical blade, circumference arrangement has the ventilation hole on the bottom plate, to the inside refrigerated air current of motor by the warp behind the ventilation hole axial inflow helical blade radially flows out.

Specifically, in order to make the base convenient to process and optimize the assembly structure of the motor, the bottom plate and the core barrel of the base are of a split structure, the bottom plate is a steel plate forming part, the core barrel is an aluminum casting, the core barrel is fixed on the bottom plate through bolts, and two bearings for supporting the rotating shaft are installed in the core barrel.

In order to increase the strength of the base plate, the periphery of the ventilation hole is provided with a protruding ring extending axially.

Specifically, the helical blade and the cast aluminum end ring are of an integral structure.

Specifically, in order to facilitate the assembly of the core barrel and the bottom plate, the end face of the core barrel, which is attached to the bottom plate, is provided with positioning protrusions, the positioning protrusions extend into the positioning holes in the bottom plate, and the positioning protrusions are at least two circumferentially distributed.

The specific fixing form of the core barrel and the bottom plate is as follows: and threaded holes are distributed on the outer ring of the joint of the core barrel and the bottom plate, and bolts for fixing penetrate through the through holes on the bottom plate and are screwed on the threaded holes.

The utility model has the advantages that: the utility model discloses set up helical blade on the outside rotor of outer rotor fan motor and set up the ventilation hole on the bottom plate, motor during operation, helical blade is air supply to the outer lane by force under centrifugal action, bottom plate department is taken away the heat of stator with the stator contact by the inspiratory air current inflow motor inside through the ventilation hole on the bottom plate, the purpose to stator cooling has been realized, the core section of thick bamboo and the bearing of direct or indirect contact with the stator have also reached the purpose of cooling, the life of bearing has just so been improved, the coil is also difficult to burn out, the motor can keep long-time stable work.

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 diagram of the present invention;

FIG. 3 is a bottom view of the bottom plate of FIG. 2 with portions cut away;

fig. 4 is a schematic view of a core barrel of the motor of the present invention;

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 barrel, 2', a stator, 3' and a rotor;

in FIG. 2: 1. 1-1 parts of a base, 1-1 parts of a bottom plate, 1-1 parts of a vent hole, 1-2 parts of a core barrel, 1-2 parts of a positioning protrusion and a threaded hole;

2. a stator;

3. 3-1 part of a rotor, 3-1 part of a cast aluminum end ring, 3-1-1 part of a spiral blade.

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.

A self-heat-dissipation external rotor fan motor as shown in figure 2 comprises a base 1, a stator 2 and a rotor 3, wherein the base 1 comprises a bottom plate 1-1 and a core barrel 1-2, the core of the stator 2 is fixed on the core barrel 1-2, the core of the rotor 3 is sleeved on the core of the stator 2 with a gap, the rotating shaft of the rotor 3 extends into the core barrel 1-2, the rotor 3 is provided with a cast aluminum end ring 3-1 which is cast with the core, the rotor 3 is provided with a spiral blade 3-1-1 which is arranged on the outer end surface of the cast aluminum end ring 3-1 close to the bottom plate 1-1, the outer end surface of the cast aluminum end ring 3-1-1 is arranged on the periphery of the bottom plate 1-1, the rotor 3 core is provided with a cast aluminum end ring 3-1 at both ends, the end ring is provided with a spiral blade 3-1-1 which is close to the bottom plate 1-1, the bottom plate 1-1 is provided with vent holes 1-1, air flow for cooling the inside of the motor flows in the axial direction through the spiral blade 3-1-1, the axial direction is consistent with the motor axis, the radial direction is the diameter line direction of the motor, the radial direction of the vent holes 3-1-1 and the shape of the vent holes and the shape of the vent holes 1-1-1.

Referring to fig. 2, 4 and 5, a base plate 1-1 and a core barrel 1-2 of a base 1 are of a split structure, the base 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 base plate 1-1 through bolts, two bearings for supporting a rotating shaft are installed in the core barrel 1-2, outer rings of the two bearings are directly pressed into casting blank holes of the core barrel 1-2 in a tight fit mode, and bearing holes of the core barrel 1-2 do not need to be machined.

The periphery of the vent hole 1-1-1 is provided with a protruding ring extending axially, and the protruding ring is formed by die stretch forming.

The helical blade 3-1-1 and the cast aluminum end ring 3-1 are of an integral structure, and the helical blade 3-1-1 is cast on the cast aluminum end ring 3-1 through a die when the iron core of the rotor 3 is die-cast.

Referring to fig. 4 and 5, the end face of the core barrel 1-2, which is attached to the base plate 1-1, is provided with three positioning protrusions 1-2-1, the positioning protrusions 1-2-1 extend into positioning holes in the base plate 1-1, the positioning protrusions 1-2-1 are circumferentially distributed, threaded holes 1-2-2 are distributed in the outer ring of the attachment of the core barrel 1-2 to the base plate 1-1, and fixing bolts penetrate through holes in the base plate 1-1 and are screwed into the threaded holes 1-2-2.

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 arranged on the bottom plate 1-1 in an unequal distribution, so that the core barrel 1-2 has a unique position relation on the bottom plate 1-1, the leading-out wire of the motor has a determined position relation relative to the bottom plate 1-1, and the motor is convenient to be fixedly installed.

While the foregoing is directed to embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.

Claims

1. The utility model provides a from heat dissipation external rotor fan motor, has base (1), stator (2) and rotor (3), base (1) includes two parts of bottom plate (1-1) and core section of thick bamboo (1-2), and the iron core of stator (2) is 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), has cast aluminium end ring (3-1) that casts an organic whole with the iron core on rotor (3), characterized by: spiral blades (3-1-1) are circumferentially arranged on the outer end face of a cast aluminum end ring (3-1) of a rotor (3) close to a bottom plate (1-1), vent holes (1-1-1) are circumferentially arranged on the bottom plate (1-1), and airflow for cooling the interior of a motor axially flows in from the vent holes (1-1-1) and then radially flows out through the spiral blades (3-1-1).

2. The self-heat-dissipation external rotor fan motor according to claim 1, wherein: the base plate (1-1) and the core barrel (1-2) of the base (1) are of split structures, 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 the rotating shaft are installed in the core barrel (1-2).

3. The self-heat-dissipation external rotor fan motor as claimed in claim 2, wherein: the periphery of the ventilation hole (1-1-1) is provided with a protruding ring extending axially.

4. The self-heat-dissipation external rotor fan motor according to claim 1, wherein: the helical blade (3-1-1) and the cast aluminum end ring (3-1) are of an integral structure.

5. The self-heat-dissipation external rotor fan motor according to claim 2, 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.

6. The self-heat-dissipation external rotor fan motor as claimed in claim 2, 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).