CN217115765U

CN217115765U - External rotation type motor and rotor thereof

Info

Publication number: CN217115765U
Application number: CN202220451690.2U
Authority: CN
Inventors: 陈校伟; 赵征任
Original assignee: XIAMEN XINZHONGDA TECHNOLOGY CO LTD
Current assignee: XIAMEN XINZHONGDA TECHNOLOGY CO LTD
Priority date: 2022-03-02
Filing date: 2022-03-02
Publication date: 2022-08-02
Anticipated expiration: 2032-03-02

Abstract

The utility model discloses an outer rotation type motor and rotor thereof, rotor include sleeve, magnet, front end cap and rear end cap, magnet is a plurality of and follow telescopic internal perisporium is the annular array and arranges the setting, magnet wholly is located in the sleeve and partial to sleeve front end one side, still including can with sleeve synchronous pivoted carousel, the carousel is located sleeve axial rear side, the carousel direct or indirect with the rear end cap is connected, the carousel lateral surface is equipped with and is used for carrying out the screw hole of spiro union with the screw, the quantity of screw hole is a plurality of, and these screw holes divide into a set ofly at least, and the quantity of every group's screw hole is a plurality of duplex winding the center of carousel is the annular array and arranges. An operator can pertinently select to additionally install a screw on a certain or a certain direction of threaded holes according to the vibration and deflection conditions of the motor in the actual running process, so that the running stability of the external rotation type motor can be accurately adjusted.

Description

External rotation type motor and rotor thereof

Technical Field

The utility model relates to a motor especially relates to an outer rotation type motor and rotor thereof.

Background

When the external rotor motor is operated at a high speed, the external rotor motor is easily vibrated and deflected under the influence of centrifugal force and magnetic force. In order to improve the stability of the external rotor motor in the rotating operation, an improved structure is that one end of the rotor sleeve, which is far away from the magnet, is extended outwards axially, namely the weight of the magnet is balanced by the weight of the extended part of the sleeve. However, the improved structure not only increases the length of the rotor sleeve, but also ensures all the structures after the motor is manufactured, so that the motor cannot be adjusted in real time according to the actual running condition in the use process, and actually, the running stability of the motor cannot be accurately adjusted at all.

Secondly, when the motor runs, a large amount of heat is generated between the stator and the rotor, and the stability and the working efficiency of the motor are affected. In order to dissipate heat quickly, the existing external rotor motor is usually provided with a vent hole on an end cover of a rotor, and although the vent hole can bring cold and heat exchange of air flow inside and outside the motor, the air flow is weak, and the heat dissipation effect is poor. Therefore, a part of the motor also designs the structure around the vent hole of the end cover into a spiral shape, so that the end cover can blow air outwards along the axial direction when rotating, and the flow of air in the motor is accelerated. However, the heat dissipation effect of the motor needs to be further improved.

SUMMERY OF THE UTILITY MODEL

In order to overcome the technical problem that the stability can not be adjusted accurately in real time that the background art provided, the utility model provides an outward turning type motor and rotor thereof. The utility model provides a technical scheme that its technical problem adopted is:

the rotor of the external rotation type motor comprises a sleeve, a plurality of magnets, a front side end cover, a rear side end cover and a rotary disc, wherein the front side end cover and the rear side end cover are respectively connected to two ends of the sleeve, the magnets are arranged in an annular array along the inner peripheral wall of the sleeve, the magnets are integrally positioned in the sleeve and are deviated to one side of the front end of the sleeve, the rotor further comprises the rotary disc capable of synchronously rotating with the sleeve, the rotary disc is positioned on the axial rear side of the sleeve, the rotary disc is directly or indirectly connected with the rear side end cover, threaded holes for screw connection with screws are formed in the outer side surface of the rotary disc, the number of the threaded holes is multiple, the threaded holes are at least divided into one group, and the number of the threaded holes in each group is multiple and are arranged in an annular array around the center of the rotary disc.

The rotary table, the sleeve, the magnet, the front side end cover and the rear side end cover synchronously rotate, and the threaded holes are formed in the outer side face of the rotary table at a plurality of positions, so that an operator can pertinently select to additionally install a screw on one or a certain threaded hole according to the vibration and deflection conditions of the motor in the operation process, and the operation stability of the externally rotating motor is accurately adjusted.

In a preferred embodiment: the threaded holes are divided into at least two groups, wherein one group of threaded holes are arranged close to the outline of the outer ring of the rotary table, and the other group of threaded holes are arranged close to the outline of the inner ring of the rotary table. The range that the screw hole distributes on the carousel is wide, can put in order the range bigger.

In a preferred embodiment: the turntable is connected to the outer side of the rear end cover, the front end cover is connected with the rear end cover through a bolt, and the bolt penetrates through the sleeve.

In a preferred embodiment: the middle part of the rear end cover is provided with a hub which axially protrudes outwards, and the turntable is sleeved on the hub and is spliced with the hub. The turntable is directly inserted into the rear end cover, and the structure is simple.

In a preferred embodiment: the front side end cover and the rear side end cover are respectively provided with at least one airflow through hole, the inner side surface of the rotary table is provided with a plurality of centrifugal blades, the centrifugal blades are arranged in an annular array by taking the central axis of the rotary table as the center, the centrifugal blades drive air to flow when the rotary table rotates, external air is axially sucked into the rotor from the airflow through holes of the front side end cover, and the external air axially passes through the airflow through holes of the rear side end cover and then is radially and outwards output from a gap between the rotary table and the rear side end cover. After the rotor rotates, the centrifugal blade is utilized to generate negative pressure, so that cold air outside the motor enters from the front end cover and penetrates through the whole sleeve, heat can be taken away quickly, and the heat dissipation effect is good. And moreover, radial exhaust is formed between the rotary table and the rear end cover by utilizing the centrifugal blades, so that the exhaust volume is greatly improved, and the heat dissipation effect is further improved. Moreover, the turntable is positioned outside the rear end cover, so that the assembly and disassembly are very convenient.

In a preferred embodiment: the centrifugal blades are arranged on the rotary disc in the radial direction, so that the air exhaust efficiency can be further improved; the inner side surface of the turntable is provided with a plurality of retaining columns, and the retaining columns axially support against the rear end cover, so that the distance between the turntable and the rear end cover can be well determined, and the assembly is very convenient.

In a preferred embodiment: the retaining columns and the centrifugal blades are arranged in a one-to-one correspondence mode, the retaining columns are arranged close to the outline of the outer ring of the rotary table, and the outer ends of the centrifugal blades extend to the retaining columns; the outer end face of the rear side end cover is inwards concave to form a abdicating groove, and the centrifugal blade extends into the abdicating groove; and an arc-shaped transition curved surface is arranged at the inner end part of the inner side surface of the turntable. The bumping post aligns with centrifugal blade, makes the gas flow smooth and easy to centrifugal blade's area can do greatly as far as possible, especially forms the groove of stepping down on the back side end cover, can further increase centrifugal blade's area, improves the efficiency of airing exhaust.

In a preferred embodiment: the number of the centrifugal blades is 3-48, and the material of the rotating disc is metal or plastic or aluminum alloy.

In a preferred embodiment: the airflow through holes on the front side end cover are fan-shaped, the number of the airflow through holes is multiple, and the airflow through holes are distributed on the front side end cover in a circular array; the rear side end cover is provided with a plurality of fan-shaped airflow through holes, and the airflow through holes are distributed on the rear side end cover in a circular ring array.

An external rotation type motor comprises a stator, wherein the stator comprises a fixed shaft and a stator core, the stator core is sleeved on the fixed shaft, the external rotation type motor also comprises a rotor, the rotor comprises a sleeve, a magnet, a front side end cover and a rear side end cover, the front side end cover and the rear side end cover are respectively connected to two ends of the sleeve, the plurality of magnets are arranged in an annular array along the inner peripheral wall of the sleeve, the magnet is integrally positioned in the sleeve and deviates one side of the front end of the sleeve, the external rotation type motor also comprises a turntable capable of synchronously rotating with the sleeve, the turntable is positioned on the axial rear side of the sleeve, the turntable is directly or indirectly connected with the rear side end cover, threaded holes for screw connection with screws are arranged on the outer side surface of the turntable, the number of the threaded holes is multiple, the threaded holes are at least divided into one group, the number of each group of threaded holes is multiple, and the threaded holes are arranged in an annular array around the center of the turntable, the magnet surrounds the outside of the stator core, two ends of the fixed shaft respectively extend out of the front end cover and the rear end cover, and the fixed shaft is connected with the front end cover and the rear end cover through bearings respectively.

Drawings

The present invention will be further explained with reference to the drawings and examples.

Fig. 1 is a schematic perspective view illustrating an external rotor motor according to the present invention.

Fig. 2 is another perspective view of the external rotor motor shown in fig. 1.

Fig. 3 is an exploded perspective view of the external rotor motor shown in fig. 1.

Fig. 4 is another exploded perspective view of the external rotor motor shown in fig. 1.

Fig. 5 is a perspective view illustrating a turntable of the outer-rotor motor shown in fig. 1.

Fig. 6 is another perspective view of the turntable of the external rotation motor shown in fig. 1.

Fig. 7 is a schematic front view of the outer rotor type motor of fig. 1.

Fig. 8 is a schematic cross-sectional view of the outer rotor type motor of fig. 1.

Detailed Description

Referring to fig. 1 to 8, an external rotor type motor includes a rotor 10 and a stator 20. The rotor 10 includes a sleeve 11, a plurality of magnets 12, a front end cap 13 and a rear end cap 14, the plurality of magnets 12 are arranged in an annular array along an inner peripheral wall of the sleeve 11, and the front end cap 13 and the rear end cap 14 are respectively connected to two ends of the sleeve 11. The stator 20 includes a fixed shaft 22 and a stator core 24, and the stator core 24 is sleeved on the fixed shaft 22. The rotor 10 is rotatably sleeved outside the stator 20, the magnet 12 surrounds outside the stator core 24, two ends of the fixed shaft 22 respectively extend out of the front end cover 13 and the rear end cover 14, and the fixed shaft 22 is respectively connected with the front end cover and the rear end cover through bearings 30. The working principle of the external rotor motor is the prior art and will not be described in detail.

The magnet 12 is entirely located inside the sleeve 11 and is biased toward the front end side of the sleeve (i.e., biased toward the front end cap). The rotor 10 further includes a rotary disk 15 capable of rotating synchronously with the sleeve, the rotary disk 15 is located at the axial rear side of the sleeve 11, the rotary disk 15 is directly or indirectly connected to the rear end cover 14, the outer side surface (i.e., the end surface facing the outside of the motor) of the rotary disk 15 is provided with a plurality of threaded holes 151 for screwing with screws (not shown), the number of the threaded holes 151 is multiple, the threaded holes 151 are at least divided into one group, and the number of the threaded holes in each group is multiple and is arranged around the center of the rotary disk 15 in a circular array. The rotary disk 15, the sleeve 11, the magnet 12, the front end cover 13 and the rear end cover 14 rotate synchronously during operation, and screws can be screwed on one or a plurality of screw holes 151 in a targeted manner according to the actual condition of motor operation.

Preferably, the threaded holes 151 are divided into at least two groups, one of which is disposed adjacent to the outer ring profile of the rotary plate 15 (as shown in fig. 6), and the other of which is disposed adjacent to the inner ring profile of the rotary plate (not shown). As can be understood, several groups of threaded holes can be additionally arranged between the inner ring and the outer ring of the turntable.

Preferably, the rotating disc 15 is connected to the outside of the rear end cap 14, the front end cap 13 and the rear end cap 14 are connected by a bolt 16, the bolt 16 passes through the sleeve 11, and the front end cap 13 and the rear end cap 14 tightly hold the sleeve 11 under the action of the bolt. In this embodiment, five bolts 16 are used, evenly spaced.

Preferably, the middle of the rear end cover 14 is provided with a hub 146 protruding outward in the axial direction, a through hole is formed in the middle of the turntable 15, the hub 146 is sleeved with the through hole and is connected with the hub 146 in an inserting manner, specifically, an axially extending clamping block 158 is arranged on the wall around the through hole, a clamping groove 148 is correspondingly arranged on the outer peripheral surface of the hub 146, and the clamping block and the clamping groove are connected in an inserting manner in a matching manner.

Preferably, the front end cover 13 and the rear end cover 14 are each provided with at least one air flow through

hole

132, 142, and the inner side surface (the side facing the rear end cover) of the rotary disk 15 is provided with a plurality of centrifugal blades 152, and the centrifugal blades 152 are arranged in an annular array around the central axis of the rotary disk. The centrifugal blades 152 drive air to flow when rotating, a negative pressure is formed around the rotor disk 15, and external air is axially sucked into the rotor from the air flow through hole 132 of the front end cover 13, axially passes through the air flow through hole 142 of the rear end cover 14, and is then output outward from a gap between the rotor disk 15 and the rear end cover 14, thereby taking away heat between the stator and the rotor.

Preferably, the centrifugal blades 152 are arranged radially on the rotating disk 15, i.e. pointing towards a central point.

Preferably, a plurality of retaining posts 154 are disposed on the inner side surface of the rotary disk 15, and the retaining posts 154 axially abut against the rear end cap 14, so that a gap is conveniently formed between the rotary disk and the rear end cap to facilitate the radial outward discharge of the air flow when the centrifugal blades rotate.

Preferably, the blocking posts 154 are arranged corresponding to the centrifugal blades 152 one by one, the blocking posts 154 are arranged near the outer contour of the rotating disk 15, and the outer ends of the centrifugal blades 152 extend to the blocking posts 154.

Preferably, the outer end face of the rear end cap 14 is recessed to form a relief groove 144, and the centrifugal blade 152 extends into the relief groove. In addition, an arc-shaped transition curved surface 156 is arranged at the inner end of the inner side surface of the rotating disk 15, and correspondingly, the part of the centrifugal blade 152 located on the arc-shaped transition curved surface 156 is correspondingly designed to be an arc structure.

Preferably, the number of the centrifugal blades 152 is 3-48, and the material of the rotating disk 15 may be metal or plastic or aluminum alloy.

Preferably, the airflow through holes 132 on the front end cover 13 are fan-shaped, and the number of the airflow through holes is multiple, and the airflow through holes are arranged on the front end cover in a circular ring array; the airflow through holes 142 on the rear end cap 14 are fan-shaped, and the number of the airflow through holes is multiple, and the airflow through holes are arranged on the rear end cap in a circular array.

The above description is only a preferred embodiment of the present invention, and therefore the scope of the present invention should not be limited by this description, and all equivalent changes and modifications made within the scope and the specification of the present invention should be covered by the present invention.

Claims

1. The utility model provides a rotor of external rotor motor, includes sleeve, magnet, preceding side end cap and back side end cap connect respectively in the sleeve both ends, the magnet is a plurality of and is the annular array setting of arranging along telescopic internal perisporium, its characterized in that: the magnet is wholly located in the sleeve and partial to sleeve front end one side, still include can with sleeve synchronous pivoted carousel, the carousel is located sleeve axial rear side, the carousel direct or indirect with the rear end cover is connected, the carousel lateral surface is equipped with and is used for carrying out the screw hole of spiro union with the screw, the quantity of screw hole is a plurality of, and these screw holes divide into a set ofly at least, and the quantity of every group's screw hole is a plurality of duplex winding the center of carousel is ring array and arranges.

2. The rotor of an external rotation type motor as claimed in claim 1, wherein: the threaded holes are divided into at least two groups, wherein one group of threaded holes are arranged close to the outline of the outer ring of the rotary table, and the other group of threaded holes are arranged close to the outline of the inner ring of the rotary table.

3. The rotor of an external rotor motor according to claim 1 or 2, wherein: the turntable is connected to the outer side of the rear end cover, the front end cover is connected with the rear end cover through a bolt, and the bolt penetrates through the sleeve.

4. The rotor of an external rotation type motor as claimed in claim 3, wherein: the middle part of the rear end cover is provided with a hub which axially protrudes outwards, and the turntable is sleeved on the hub and is spliced with the hub.

5. The rotor of an external rotor motor according to claim 1 or 2, wherein: the front side end cover and the rear side end cover are respectively provided with at least one airflow through hole, the inner side surface of the rotary table is provided with a plurality of centrifugal blades, the centrifugal blades are arranged in an annular array by taking the central axis of the rotary table as the center, the centrifugal blades drive air to flow when the rotary table rotates, external air is axially sucked into the rotor from the airflow through holes of the front side end cover, and the external air axially passes through the airflow through holes of the rear side end cover and then is radially and outwards output from a gap between the rotary table and the rear side end cover.

6. The rotor of an external rotation type motor as claimed in claim 5, wherein: the centrifugal blades are arranged on the rotating disc in the radial direction; and a plurality of retaining columns are arranged on the inner side surface of the rotary table, and the retaining columns axially support against the rear end cover.

7. The rotor of an external rotor motor according to claim 6, wherein: the retaining columns and the centrifugal blades are arranged in a one-to-one correspondence mode, the retaining columns are arranged close to the outline of the outer ring of the rotary table, and the outer ends of the centrifugal blades extend to the retaining columns; the outer end face of the rear side end cover is inwards concave to form a abdicating groove, and the centrifugal blade extends into the abdicating groove; and an arc-shaped transition curved surface is arranged at the inner end part of the inner side surface of the turntable.

8. The rotor of an external rotor motor according to claim 6, wherein: the number of the centrifugal blades is 3-48, and the material of the rotating disc is metal or plastic or aluminum alloy.

9. The rotor of an external rotation type motor as claimed in claim 5, wherein: the airflow through holes on the front side end cover are fan-shaped, the number of the airflow through holes is multiple, and the airflow through holes are distributed on the front side end cover in a circular array; the rear side end cover is provided with a plurality of fan-shaped airflow through holes, and the airflow through holes are distributed on the rear side end cover in a circular ring array.

10. The utility model provides an external rotor motor, includes the stator, the stator includes fixed axle and stator core, the stator core cup joints in on the fixed axle, its characterized in that: the rotor of any one of claims 1-9, further comprising a magnet surrounding the stator core, wherein two ends of the fixed shaft respectively extend out of the front end cover and the rear end cover, and the fixed shaft and the front end cover and the rear end cover are respectively connected through bearings.