CN212392721U

CN212392721U - Brushless motor for industrial ceiling fan

Info

Publication number: CN212392721U
Application number: CN202021421612.5U
Authority: CN
Inventors: 周艳阳; 吴化新; 阳自威
Original assignee: Zhongshan Miaowang Electric Co ltd
Current assignee: Zhongshan Miaowang Electric Co ltd
Priority date: 2020-07-17
Filing date: 2020-07-17
Publication date: 2021-01-22
Anticipated expiration: 2030-07-17

Abstract

The utility model discloses a brushless motor for industrial ceiling fan, include: the main shaft and the rotation set up casing subassembly on the main shaft, fixed being provided with on the main shaft is located the inside stator module of casing subassembly, be equipped with on the casing subassembly with stator module assorted rotor subassembly, fixed being provided with at least a central cover dish on the main shaft, stator module includes two at least sector annular iron core units, all iron core units end to end in proper order in order to enclose into an iron core ring, the iron core ring is fixed in on the central cover dish. During the brushless motor for the industrial ceiling fan of structure more than the production, can obtain a plurality of iron core units on the sheetmetal punching press, then with all iron core units end to end formation iron core rings in proper order, the annular iron core unit of fan helps the blank position on the make full use of sheetmetal to carry out the punching press, reduces the waste of raw and other materials to in process of production, the iron core unit is stored and is transported for the iron core ring of integral type more easily.

Description

Brushless motor for industrial ceiling fan

Technical Field

The utility model relates to an industrial electrical apparatus technical field especially relates to a brushless motor for industry ceiling fan.

Background

As shown in fig. 1, the conventional brushless motor for an industrial ceiling fan is generally manufactured by punching a rectangular metal sheet 1 ' to form a circular sheet-shaped iron core sheet 2 ', and then stacking a plurality of iron core sheets to form a stator core, so that the stator core structure causes a great amount of waste of raw materials, which affects the production cost of the product, and in the middle of the production, the circular sheet-shaped iron core sheet 2 ' is inconvenient to store and transport.

Secondly, the general industrial ceiling fan has larger power, lower rotating speed and larger output torque, most of the brushless motors for the industrial ceiling fan adopt a stator and rotor structure with 72 slots, 66 poles or 63 slots and 56 poles, and although the brushless motors achieve higher winding coefficients, the torque ripple frequency is lower, the cogging torque ripple is serious, and further the problems of larger vibration and noise are caused. Moreover, the efficiency of winding is reduced by too many slots of these structures, and the overall cost performance is not good.

Moreover, because the inner diameter of the stator core of the brushless motor for the industrial ceiling fan is large, a connecting part is generally required to be arranged between the main shaft and the stator core, and the commonly used connecting part has a complex structure and weak overall structural strength.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, one of the purposes of the utility model is to provide a brushless motor for industrial ceiling fan which reduces the waste of raw materials and facilitates the storage and transportation of iron core rings.

The utility model provides a technical scheme that its technical problem adopted is:

As a preferred embodiment of the present invention, the stator assembly includes three core units, each core unit includes an arc strip portion and a plurality of spaced racks extending radially outward along the outer edge of the circumference of the arc strip portion, the region between the adjacent racks constitutes a tooth space, the head end of the arc strip portion is provided with a dovetail groove, and the tail end of the arc strip portion is provided with an embedded portion matching the shape of the dovetail groove. When the iron core ring with the structure is assembled, the embedded part of the first iron core unit is inserted into the dovetail groove of the second iron core unit, then the embedded part of the second iron core unit is inserted into the dovetail groove of the third iron core unit, and then the embedded part of the third iron core unit is inserted into the dovetail groove of the first iron core unit, so that the iron core ring consisting of the three iron core units is obtained.

Preferably, the arc strip portion is provided with a plurality of threaded through holes at intervals along the radian direction of the arc strip portion, and the central sleeve disc is connected with the threaded through holes through bolts.

As the preferred embodiment of the present invention, the iron core circle has 45 tooth sockets extending radially outwards around the axis circumference of the main shaft, and the rotor assembly includes 52 inner walls disposed on the casing assembly and enclosed in the permanent magnet outside the tooth sockets. The torque ripple frequency of the brushless motor for the industrial ceiling fan adopting the combination mode reaches 2340 times/rotation, and the torque amplitude of the tooth groove can be effectively reduced, so that the vibration and the noise generated during the operation of the ceiling fan are reduced.

The utility model discloses an in some embodiments, central sleeve dish is by the integrative stamping forming of sheet metal component, and preferably, the thickness of sheet metal component is about mm, the middle part of central sleeve dish is equipped with the confession the installation sleeve that the main shaft passed, central sleeve dish is located be equipped with the boss around the installation sleeve, the circumference border of central sleeve dish upwards bend and form with the hem that turns over that the iron core unit is connected. Wherein, the installation sleeve and the flanging are both structures formed in the stamping process, and the production is very convenient.

In this embodiment, the spindle is provided with two central sleeves, the two central sleeves are attached to each other, the turned edges of the two central sleeves are deviated from each other, and the two mounting sleeves are abutted to each other to form a mounting channel for welding with the spindle. The main shaft is connected with two central sleeve discs which deviate from each other, so that stress balance is facilitated, and the stability of the connection of the main shaft and the stator assembly can be enhanced.

As the utility model discloses a preferred embodiment, the casing subassembly includes the ring shell, the rotor subassembly is located on the circumference inner wall of ring shell, the upper end and the lower extreme of ring shell be connected with respectively with the main shaft rotates the upper end plate and the lower end plate of connecting, be equipped with heat radiation structure on the circumference surface of ring shell, heat radiation structure helps distributing away the heat that brushless motor produced fast.

Preferably, the heat dissipation structure is a heat dissipation groove formed on the circumferential outer surface of the circular ring shell, so that the heat dissipation area of the circular ring shell in contact with outside air is increased, the heat dissipation groove surrounds the circumferential outer surface of the circular ring shell and is spirally distributed along the height direction of the circular ring shell, when the heat dissipation structure is manufactured, the heat dissipation groove which is spirally upward or spirally downward can be obtained only by turning a turning tool on the circumferential outer surface of the circular ring shell made of a metal material, and the heat dissipation structure is very convenient to produce and process.

Drawings

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

Fig. 1 is a schematic view of a conventional stator core die-cut into a metal sheet;

FIG. 2 is a schematic external view of one embodiment of the brushless motor for an industrial ceiling fan of the present invention;

FIG. 3 is an exploded schematic view of FIG. 2;

fig. 4 is an exploded view of the iron core ring of the present invention;

fig. 5 is a schematic view of the iron core unit of the present invention being formed on a metal sheet by punching;

FIG. 6 is a schematic diagram of the construction of a center sleeve disk;

fig. 7 is a schematic view of the internal structure of an embodiment of the brushless motor for industrial ceiling fans according to the present invention.

Detailed Description

This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.

Referring to fig. 2 to 5, the utility model discloses a brushless motor for industrial ceiling fan, include: the main shaft 1 and the rotation set up casing subassembly 20 on the main shaft 1, the fixed stator module that is located inside casing subassembly 20 that is provided with on the main shaft 1, be equipped with on the casing subassembly 20 with stator module assorted rotor subassembly, the fixed at least one central set of plates 5 that is provided with on the main shaft 1, stator module includes two at least sector annular iron core units 31, and all iron core units 31 are end to end in proper order to enclose into an iron core ring 30, iron core ring 30 is fixed in on the central set of plates 5. When the brushless motor for the industrial ceiling fan with the structure is produced, the plurality of iron core units 31 can be obtained by stamping on the metal sheet, then all the iron core units 31 are sequentially connected end to form the iron core ring 30, the fan-shaped iron core units 31 are beneficial to stamping by fully utilizing blank positions on the metal sheet, the waste of raw materials is reduced, and in the production process, the iron core units 31 are easier to store and transport relative to the integrated iron core ring 30.

Referring to fig. 4 and 5, as a preferred embodiment of the present invention, the stator assembly includes three core units 31, each core unit 31 includes an arc strip portion 311 and a plurality of spaced racks 312 extending radially outward along the outer circumference of the arc strip portion 311, a tooth space 313 is formed in an area between adjacent racks 312, a dovetail groove 314 is formed at the head end of the arc strip portion 311, and an embedded portion 315 matching the shape of the dovetail groove 314 is formed at the tail end of the arc strip portion 311. When the core ring 30 having the above-described structure is assembled, the fitting portion 315 of the first core unit 31 is inserted into the dovetail groove 314 of the second core unit 31, the fitting portion 315 of the second core unit 31 is inserted into the dovetail groove 314 of the third core unit 31, and the fitting portion 315 of the third core unit 31 is inserted into the dovetail groove 314 of the first core unit 31, thereby obtaining the core ring 30 composed of the three core units 31.

Referring to fig. 3 to 5, preferably, the circular arc strip 311 is provided with a plurality of threaded through holes 316 at intervals along the arc direction, and the center sleeve 5 is connected with the threaded through holes 316 through bolts 317.

As a preferred embodiment of the present invention, 45 tooth sockets 313 radially extending outwards are distributed on the circumference of the axis of the iron core ring 30 around the main shaft 1, and 52 permanent magnets 41 arranged on the inner wall of the housing assembly 20 and around the outside of the tooth sockets 313 are included in the rotor assembly.

By varying the fit of the number of slots and permanent magnets, see the following table, the following sets of data are derived:

tooth socketQuantity (number)	Number of permanent magnets	Torque ripple frequency (times/rotation)
			63	56	504 times/turn
72	66	592 times/turn
			12	14	2340 times per turn

Therefore, the torque ripple frequency of the brushless motor for the industrial ceiling fan adopting the combination mode reaches 2340 times per revolution, the cogging torque amplitude can be effectively reduced, and the vibration and the noise generated during the operation of the ceiling fan are reduced.

Referring to fig. 6, in some embodiments of the present invention, the central sleeve disk 5 is formed by integrally stamping a sheet metal part, preferably, the thickness of the sheet metal part is about 3mm, the middle portion of the central sleeve disk 5 is provided with a mounting sleeve 51 for the spindle 1 to pass through, the central sleeve disk 5 is located around the mounting sleeve 51 and is provided with a boss 52, and the circumferential edge of the central sleeve disk 5 is bent upwards to form a turned edge 53 connected with the iron core unit 31. Wherein, the mounting sleeve 51 and the flanging edge 53 are both structures formed in the stamping process, and the production is very convenient.

Referring to fig. 7, in the present embodiment, two central sleeve discs 5 are disposed on the main shaft 1, the two central sleeve discs 5 abut against each other, the turned edges 53 of the two central sleeve discs 5 face away from each other, and the two mounting sleeves 51 abut against each other to form a mounting channel for welding with the main shaft 1. The main shaft 1 is connected with the two central sleeve discs 5 which deviate from each other, so that stress balance is facilitated, and the stability of connection of the main shaft 1 and the stator assembly can be enhanced.

Referring to fig. 3, as a preferred embodiment of the present invention, the housing assembly 20 includes a circular ring housing 21, the rotor assembly is disposed on the inner wall of the circumference of the circular ring housing 21, the upper end and the lower end of the circular ring housing 21 are respectively connected with an upper end plate 22 and a lower end plate 23 connected to the main shaft 1 in a rotating manner, a heat dissipation structure 211 is disposed on the outer surface of the circumference of the circular ring housing 21, and the heat dissipation structure 211 helps to quickly dissipate heat generated by the brushless motor.

Preferably, the heat dissipation structure 211 is a heat dissipation groove formed on the circumferential outer surface of the circular ring casing 21, so as to increase the heat dissipation area of the circular ring casing 21 contacting with the outside air, the heat dissipation groove surrounds the circumferential outer surface of the circular ring casing 21 and is spirally distributed along the height direction of the circular ring casing 21, when the heat dissipation structure 211 is manufactured, the heat dissipation groove which is spirally upward or spirally downward can be obtained only by turning a turning tool on the circumferential outer surface of the circular ring casing 21 made of a metal material, and the production and the processing are very convenient.

The above embodiments are merely preferred embodiments of the present invention, and the present invention may also have other embodiments, such as reasonable combinations of the technical solutions recorded in the embodiments. Equivalent modifications or substitutions may be made by those skilled in the art without departing from the spirit of the invention, and such equivalent modifications or substitutions are intended to be included within the scope of the claims set forth herein.

Claims

1. A brushless motor for an industrial ceiling fan, comprising:

the main shaft (1) and the rotation setting are in casing subassembly (20) on main shaft (1), the fixed stator module that is located casing subassembly (20) inside that is provided with on main shaft (1), be equipped with on casing subassembly (20) with stator module assorted rotor subassembly, the fixed at least central cover dish (5) that is provided with on main shaft (1), stator module includes two at least fan-shaped iron core units (31), and all iron core units (31) end to end in proper order enclose into an iron core ring (30), iron core ring (30) are fixed in on the central cover dish (5).

2. The brushless motor for industrial ceiling fan of claim 1, wherein:

the stator assembly comprises three iron core units (31), each iron core unit (31) comprises an arc strip portion (311) and a plurality of racks (312) which radially extend outwards along the outer edge of the circumference of the arc strip portion (311) and are spaced from each other, a tooth groove (313) is formed in an area between every two adjacent racks (312), a dovetail groove (314) is formed in the head end of each arc strip portion (311), and an embedding portion (315) matched with the dovetail groove (314) in shape is formed in the tail end of each arc strip portion (311).

3. The brushless motor for the industrial ceiling fan of claim 2, wherein:

the arc strip portion (311) is provided with a plurality of threaded through holes (316) at intervals along the radian direction of the arc strip portion, and the central sleeve disc (5) is connected with the threaded through holes (316) through bolts (317).

4. The brushless motor for industrial ceiling fan of claim 1, wherein:

the iron core ring (30) is distributed with 45 tooth grooves (313) which radially extend outwards around the circumference of the axis of the main shaft (1), and the rotor assembly comprises 52 permanent magnets (41) which are arranged on the inner wall of the shell assembly (20) and surround the outer part of the tooth grooves (313).

5. The brushless motor for industrial ceiling fan of claim 1, wherein:

center sleeve dish (5) are by the integrative stamping forming of sheet metal component, the middle part of center sleeve dish (5) is equipped with the confession installation sleeve (51) that main shaft (1) passed, center sleeve dish (5) are located be equipped with boss (52) around installation sleeve (51), the circumference border of center sleeve dish (5) upwards bend and form with turn over hem (53) that iron core unit (31) are connected.

6. The brushless motor for the industrial ceiling fan of claim 5, wherein:

the main shaft (1) is provided with two central sleeve discs (5), the two central sleeve discs (5) are attached to each other, turned edges (53) of the two central sleeve discs (5) deviate from each other, and two mounting sleeves (51) are connected in a butting mode to form a mounting channel for welding with the main shaft (1).

7. The brushless motor for industrial ceiling fan of claim 1, wherein:

casing subassembly (20) include ring shell (21), the rotor subassembly is located on the circumference inner wall of ring shell (21), the upper end and the lower extreme of ring shell (21) be connected with respectively with main shaft (1) rotate upper end plate (22) and lower end plate (23) of connecting, be equipped with heat radiation structure (211) on the circumference surface of ring shell (21).

8. The brushless motor for an industrial ceiling fan of claim 7, wherein:

the heat dissipation structure (211) is a heat dissipation groove formed on the circumferential outer surface of the circular ring shell (21), and the heat dissipation groove surrounds the circumferential outer surface of the circular ring shell (21) and is spirally distributed along the height direction of the circular ring shell (21).