CN209375315U - There are three the brushless motors of bearing for dress - Google Patents

Abstract

The utility model relates to a kind of dress, there are three the brushless motors of bearing, air duct shell, stator module, rotor assembly, first bearing, second bearing, 3rd bearing and preceding coil holder including being equipped with bearing fixed block；First bearing and second bearing are mounted in the first central through hole of the bearing fixed block of air duct shell, 3rd bearing installation is at the front in the 3rd bearing room of frame, stator module is fixed on the shell of air duct, stator module some be located in the shell of air duct, the stator module of another part is located at except the shell of air duct, the rear end of the shaft of rotor assembly is inserted into from the inner hole of first bearing and the inner hole of second bearing respectively, front frame is arranged on the stator core of stator module, the front end of shaft is located in the inner hole of the 3rd bearing on preceding coil holder, the permanent magnet element of rotor assembly is located at the interior intracavitary of the stator core of stator module.It is small that the utility model brushless motor has many advantages, such as that structurally reasonable, rotor assembly swings small and noise.

Description

There are three the brushless motors of bearing for dress

[technical field]

The utility model relates to small-sized or micromotors, more particularly to the motor on hair dryer.

[background technique]

Small-sized or micromotor, such as a kind of high-speed permanent-magnet brushless motor is with power density is big, geometric dimension is small, dynamic The series of advantages such as fast and operational efficiency height are responded, are had broad application prospects in high-speed cruising occasion, such as hair dryer On just used a kind of high-speed permanent-magnet brushless motor.

The prior art only includes two bearings for the brushless motor on hair dryer, the brushless motor when starting, Rotor assembly can be swung, and especially the brushless motor is used for hair dryer, and revolving speed is very high, and rotor assembly swings more strict Evil, causes the permanent magnet on rotor assembly to scrape the stator core of stator module, can generate sharp noise, and be easily damaged The stator core of permanent magnet and stator module on rotor assembly.

[utility model content]

A kind of dress is provided the technical problem to be solved by the present invention is to avoid above-mentioned the deficiencies in the prior art place There are three the brushless motors of bearing, and there is structurally reasonable, rotor assembly to swing, and small, noise is small, fixed, good heat dissipation, wind speed High, the advantages that air quantity is big and the service life is long.

The utility model solve the technical problem the technical solution adopted is that:

A kind of brushless motor of dress there are three bearing is provided, including the air duct shell of both ends open inner hollow, stator pack Part, rotor assembly and fan blade；The stator module includes stator core and stator winding；The rotor assembly includes shaft and forever Magnet assembly；The brushless motor further includes first bearing, second bearing, 3rd bearing and uses front made of engineering plastics Frame, the front are provided with the 3rd bearing room for accommodating the 3rd bearing；Institute can be accommodated by being provided in the air duct shell The bearing fixed block of first bearing and second bearing is stated, which is fixed on the air duct shell by least two pieces of ribs On the inner wall of body, the air duct of air circulation is respectively formed between adjacent two ribs, the length of the bearing fixed block is less than described The length of air duct shell, the bearing fixed block are equipped with the first central through hole；The permanent magnet element is fixed on the shaft Front end；The first bearing and second bearing are mounted in the first central through hole of the bearing fixed block of the air duct shell, institute It states 3rd bearing to be mounted in the 3rd bearing room of the preceding coil holder, the stator module is fixed on the air duct shell, institute Stating stator module, some is located in the air duct shell, the stator module of another part be located at the air duct shell it Outside, the rear end of the shaft of the rotor assembly is inserted into from the inner hole of first bearing and the inner hole of second bearing respectively, the front Frame is arranged on the stator core of the stator module outside the air duct shell, and the front end of the shaft of the rotor assembly is located at In the inner hole of 3rd bearing on the preceding coil holder, the permanent magnet element of the rotor assembly is located at the stator of the stator module Iron core it is interior intracavitary, the fan blade is located at the rear end in the air duct shell and being fixed on the shaft.

First central through hole of the bearing fixed block and the air duct shell possess common central axis.

The brushless motor further includes using rear coil holder made of engineering plastics, and the rear coil holder is arranged in the wind On the stator core of the intracorporal stator module of road shell.

The length of stator module outside the air duct shell be greater than be located at the intracorporal stator module of air duct shell it Length.

The brushless motor further includes terminal plate, more pieces of contact pins and plug；More pieces of respective one end of contact pin respectively with it is described The stator winding of stator module is electrically connected, and the respective other end is electrically connected with the terminal plate respectively and fixes the terminal plate；Institute Plug electrical connection is stated to be fixed on the terminal plate.

The brushless motor further includes fixed bracket, which includes cylinder type rear end and be connected with the rear end The cylinder type front end connect, the outer diameter of the front end are greater than the outer diameter of the rear end, and the front end, which is equipped with, to be used to hold Receive first cavity at the stator module rear portion, the rear end, which is equipped with, is used to accommodate the of the first bearing and second bearing Two central through holes；The first center that the rear end insertion of the fixed bracket is fixed on the bearing fixed block of the air duct shell is logical It is described fixed in the second central through hole of the rear end that the first bearing and second bearing are mounted on the fixed bracket in hole Sub-component rear portion is fixed in the first cavity of the front end of the fixed bracket.

The front end of the fixed bracket is equipped with notch at least one.

The brushless motor further includes the elastic element being mounted between the first bearing and second bearing.

Compared with the existing technology compared with there are three the beneficial effects of the brushless motor of bearing to be for the utility model dress:

One, the utility model is specially provided in the shell of air duct and can accommodate the bearing of first bearing and second bearing and fix Block, the frame that is also at the front, which is equipped with, to be used to accommodate the 3rd bearing room of 3rd bearing, using three bearings, increase rotor assembly it The fixed fulcrum of shaft so that the utility model brushless motor when starting, alleviates the swing of rotor assembly, swing compared with Small, the permanent magnet element for also avoiding rotor assembly scrapes the stator core of stator module, and noise is small；

Two, it is fixed on the inner wall of air duct shell positioned at the intracorporal bearing fixed block of air duct shell by least two pieces of ribs, The air duct of air circulation is respectively formed between adjacent two ribs, and fan blade is located in the shell of air duct, in motor operation, Fan blade will be then exhausted from air inspiration to the rear end of air duct shell, then after being sent to the front end of air duct shell by each air duct, this Under the action of fan blade, air is discharged from the air duct shell other end sample again after entering through each air duct from air duct shell one end, this Kind frame mode is very reasonable, so that can give full play to the work of fan blade after the utility model brushless motor is used on hair dryer With the wind speed of hair dryer being made high, air quantity is big, and the service life also can accordingly extend；

Three, stator module is fixed on fixed bracket, fixed；And stator module some be located at air duct shell Interior, another part even most stator module is located at except the shell of air duct, is convenient for the heat dissipation of stator module in this way, so that The utility model brushless motor good heat dissipation, temperature rise is lower, lasts a long time；

Four, first bearing and second bearing can both carry out axial heat dissipation by the first central through hole, can also pass through axis It holds fixed block to be discharged after each rib rejects heat in each air duct, moreover it is possible to by bearing fixed block through each rib again on the shell of air duct Heat dissipation discharge, heat dissipation effect are very good afterwards;3rd bearing setting is at the front in the 3rd bearing room of frame, and preceding coil holder is located at air duct Except shell, among outside air, and the 3rd bearing room of preceding coil holder is communicated towards outside with outside, therefore third The heat dissipation effect of bearing is better;

Five, there is no electric motor end cap, directly stator module is fixed in the shell of air duct, so that structure is simple, heat dissipation It is good；

Six, it is arranged between first bearing and second bearing and has elastic component so that first bearing and second bearing has one Fixed precompression, thus eliminating the need the clearance of Bearing inner, are more advantageous to reduction noise.

In conclusion the utility model dress there are three the brushless motor of bearing have structurally reasonable, rotor assembly swing it is small, The advantages that noise is small, fixed, good heat dissipation, wind speed are high, air quantity is big and the service life is long.

[Detailed description of the invention]

Fig. 1 is that there are three the axonometric projection schematic diagrames of the brushless motor of bearing for the utility model dress；

Fig. 2 is the axonometric projection schematic diagram after the brushless motor embodiment one is decomposed；

Fig. 3 is the orthographic projection main view schematic cross-sectional view of brushless motor embodiment shown in Fig. 2 one；

Fig. 4 is the axonometric projection schematic diagram after the brushless motor embodiment two is decomposed；

Fig. 5 is the orthographic projection main view schematic cross-sectional view of brushless motor embodiment shown in Fig. 4 two；

Fig. 6 is the axonometric projection schematic diagram of the air duct shell of the brushless motor；

Fig. 7 is the orthographic projection main view schematic cross-sectional view of the air duct shell；

The axonometric projection schematic diagram of coil holder before Fig. 8 is the brushless motor；

Fig. 9 is the support bracket fastened axonometric projection schematic diagram of the brushless motor；

Figure 10 is the support bracket fastened orthographic projection main view schematic cross-sectional view.

[specific embodiment]

The utility model is described in further detail below with reference to each attached drawing.

Referring to Fig. 1 to Fig. 3 and Fig. 6 to Fig. 8, there are three the brushless motors of bearing for a kind of dress, including in both ends open inside Empty air duct shell 10, stator module 20, rotor assembly 30 and fan blade 40；The stator module 20 includes 21 He of stator core Stator winding 22；The rotor assembly 30 includes shaft 31 and permanent magnet element 32；The brushless motor further includes first bearing 51, preceding coil holder 60 made of second bearing 52,3rd bearing 53 and use engineering plastics, which, which is equipped with, is used to accommodate institute State the 3rd bearing room 61 of 3rd bearing 53；The first bearing 51 and the second axis can be accommodated by being provided in the air duct shell 10 52 bearing fixed block 11 is held, which is fixed on the inner wall of the air duct shell 10 by least two pieces of ribs 12 On, the air duct 13 of air circulation is respectively formed between adjacent two ribs 12, the length of the bearing fixed block 11 is less than the wind The length of road shell 10, the bearing fixed block 11 are equipped with the first central through hole 111；The permanent magnet element 32 is fixed on described The front end of shaft 31；The first bearing 51 and second bearing 52 are mounted on the of the bearing fixed block 11 of the air duct shell 10 In one central through hole 111, the 3rd bearing 53 is mounted in the 3rd bearing room 61 of the preceding coil holder 60, the stator module 20 are fixed on the air duct shell 10, some is located in the air duct shell 10 stator module 20, and in addition one The stator module 20 divided is located at except the air duct shell 10, and the rear end of the shaft 31 of the rotor assembly 30 is respectively from first axle 51 inner hole and the inner hole insertion of second bearing 52 are held, the preceding coil holder 60 is arranged in the stator outside the air duct shell 10 On the stator core 21 of component 20, the front end of the shaft 31 of the rotor assembly 30 is located at the 3rd bearing on the preceding coil holder 60 In 53 inner hole, the permanent magnet element 32 of the rotor assembly 30 is located at the inner cavity of the stator core 21 of the stator module 20 Interior, the fan blade 40 is located in the air duct shell 10 and is fixed on the rear end of the shaft 31.

Referring to Fig. 3, Fig. 6 and Fig. 7, stator module 20 is fixed on the air duct shell 10, can be directly anchored to air duct On the end face of the bearing fixed block 11 of shell 10, bearing fixed block 11 can also be re-extended out forward one and encompass stator module 21 rear end of stator core of stator module 20 is fixed on the cylinder type by the cylinder type mounting portion of 20 21 rear end of stator core In mounting portion, which is similar to the structure of the front end 82 of the fixation bracket 80 in Fig. 9；It can also be by Stator module 20 is fixed on the air duct shell 10 by exterior part, is come below in conjunction with Fig. 4, Fig. 5, Fig. 9 and Figure 10 detailed Thin description.

Referring to fig. 2 to Fig. 5 and Fig. 8, the setting of 3rd bearing 53 is at the front in the 3rd bearing room 61 of frame 60, preceding coil holder 60 Except air duct shell 10, among the outside air, and the 3rd bearing room 61 of preceding coil holder 60 is towards outside, with outside It communicates, therefore the heat dissipation effect of 3rd bearing 53 is better.

Referring to Fig. 6 and Fig. 7, in order to reinforce the intensity and fastness of bearing fixed block 11, the quantity of rib 12 can be designed It is more, but also should not be too many, such as the quantity of rib 12 can be 5~10.

Referring to Fig. 6 and Fig. 7, practical upper air duct shell 10, bearing fixed block 11 and rib 12 are the same parts, certainly it Be also possible to different assembling parts and form.

Referring to Fig. 7, the first central through hole 111 of the bearing fixed block 11 possesses in common with the air duct shell 10 Mandrel line.

Referring to fig. 2 to Fig. 5, the brushless motor further includes using rear coil holder 70 made of engineering plastics, the rear coil holder 70 are arranged on the stator core 21 of the stator module 20 in the air duct shell 10.Coil holder 70 and preceding coil holder 60 are all adopted afterwards It is made of engineering plastics, additionally it is possible to each stator slot (not shown) and stator winding 22 of the stator core 21 as stator module 20 Between insulation use, referring to fig. 2 to Fig. 5 and Fig. 8, the stator slot equivalent amount with stator core 21 is provided on preceding coil holder 60 With the preceding tongue 69 of specification, stator slot equivalent amount and specification with stator core 21 are also equipped on rear coil holder 70 Rear tongue 79, by tongue 79 after each preceding tongue 69 and rear coil holder 70 of preceding coil holder 60 respectively from the forward and backward of stator core 21 End is inserted into each stator slot of stator core 21, it is ensured that the insulation between stator core 21 and stator winding 22 ?.

Referring to Fig. 3 and Fig. 5, the length of the stator module 20 outside the air duct shell 10, which is greater than, is located at the air duct shell The length of stator module 20 in body 10；That is, the stator module 20 only has small part to be located at the air duct shell 10 Interior, most stator module 20 is convenient for the heat dissipation of stator module 20 except the air duct shell 10 in this way, so that this is practical Novel brushless motor good heat dissipation, temperature rise is lower, lasts a long time.

Referring to Fig. 1 to Fig. 5, for easy-to-connect and securely, the brushless motor further includes terminal plate 99, more pieces of contact pins 98 With plug 97；More pieces of respective one end of contact pin 98 are electrically connected with the stator winding 22 of the stator module 20 respectively, respective another One end is electrically connected with the terminal plate 99 respectively and fixes the terminal plate 99；The electrical connection of plug 97 is fixed on the terminal plate On 99.Referring to Fig. 1 and Fig. 8, before each contact pin 98 can be first separately fixed on each boss 68 of the front end face of coil holder 60, then will determine Sub- winding 22 is electrically connected with each contact pin 98.

Referring to fig. 4, Fig. 5, Fig. 9 and Figure 10 stator module 20 and keep stator module 20 fixed, institute in order to facilitate the installation of Stating brushless motor further includes fixed bracket 80, which includes cylinder type rear end 81 and be connected with the rear end 81 Cylinder type front end 82, the outer diameter of the front end 82 is greater than the outer diameter of the rear end 81, and the front end 82 is equipped with For accommodating first cavity 821 at 20 rear portion of stator module, the rear end 81, which is equipped with, to be used to accommodate the first bearing 51 and second bearing 52 the second central through hole 811；The insertion of rear end 81 of the fixed bracket 80 is fixed on the air duct shell In first central through hole 111 of the bearing fixed block 11 of body 10, the first bearing 51 and second bearing 52 are mounted on described solid In second central through hole 811 of the rear end 81 of fixed rack 80,20 rear portion of stator module is fixed on the fixed bracket 80 Front end 82 the first cavity 821 in.The main function of the rear end 81 of fixed bracket 80 is the axis for being inserted into air duct shell 10 Keep stator module 20 fixed after holding in the first central through hole 111 of fixed block 11, the rear end 81 of certainly fixed bracket 80 It is exactly to be used to that first bearing 51 and second bearing 52 are installed, and fix the main work of the front end 82 of bracket 80 there are one effect Be for facilitate installation fixed stator component 20.Be additionally provided with the second cavity 822 on the front end 82 of fixed bracket 80, be for The end of coil holder 70 after receiving.

Referring to Fig. 9 and Figure 10, in order to make stator module 20 radiate more preferably, the front end 82 of the fixed bracket 80 is equipped with extremely Lack notch 823 at one, the front end 82 that bracket 80 is fixed in figure is uniformly provided with notch 823 at three.

Noise, the nothing are reduced in order to eliminate the clearance inside first bearing 51 and second bearing 52 to Fig. 5 referring to fig. 2 Brush motor further includes the elastic element 59 being mounted between the first bearing 51 and second bearing 52；The both ends of elastic element 59 It is withstood between the outer ring of first bearing 51 and the outer ring of second bearing 52 respectively, certain to first bearing 51 and second bearing 52 Precompression is more advantageous to reduction noise, because of first axle to eliminate first bearing 51 and the respective internal clearance of second bearing 52 Hold 51 and second bearing 52 be generally used ball bearing, and ball bearing include inner ring and outer ring and inner ring and outer ring it Between ball and retainer, there is clearance in the inside of ball bearing, and after the certain precompression of bearing, bearing outer ring can be squeezed Ball, ball squeeze inner ring, and thus eliminating the need the clearance of Bearing inner.The elastic element 59 can be spring.

Preferred embodiments of the present invention above described embodiment only expresses, the description thereof is more specific and detailed, But it should not be understood as limiting the scope of the patent of the utility model;It should be appreciated that for the common of this field For technical staff, without departing from the concept of the premise utility, various modifications and improvements can be made, these all belong to In the protection scope of the utility model;Therefore, all equivalents and modification done with the utility model claims range, It should belong to the covering scope of the utility model claims.

Claims (8)

1. a kind of dress is there are three the brushless motor of bearing, air duct shell (10), stator module including both ends open inner hollow (20), rotor assembly (30) and fan blade (40)；The stator module (20) includes stator core (21) and stator winding；Described turn Sub-component (30) includes shaft (31) and permanent magnet element (32)；It is characterized by:

It further include first bearing (51), second bearing (52), 3rd bearing (53) and using preceding coil holder made of engineering plastics (60), which is equipped with the 3rd bearing room (61) for being used to accommodate the 3rd bearing (53)；The air duct shell (10) the bearing fixed block (11) that can accommodate the first bearing (51) and second bearing (52), the bearing fixed block are provided in (11) it is fixed on the inner wall of the air duct shell (10) by least two pieces of ribs (12), between adjacent two ribs (12) The air duct (13) of air circulation is formed, the length of the bearing fixed block (11) is less than the length of the air duct shell (10), institute Bearing fixed block (11) are stated equipped with the first central through hole (111)；The permanent magnet element (32) is fixed on the shaft (31) Front end；The first bearing (51) and second bearing (52) are mounted on the of the bearing fixed block (11) of the air duct shell (10) In one central through hole (111), the 3rd bearing (53) is mounted in the 3rd bearing room (61) of the preceding coil holder (60), described Stator module (20) is fixed on the air duct shell (10), the stator module (20) some be located at the air duct shell (10) in, the stator module (20) of another part is located at except the air duct shell (10), and the rotor assembly (30) turns The rear end of axis (31) is inserted into from the inner hole of first bearing (51) and the inner hole of second bearing (52) respectively, and the preceding coil holder (60) sets It sets on the stator core (21) for being located at the stator module (20) of the air duct shell (10) outside, the rotor assembly (30) turns The front end of axis (31) is located in the inner hole of the 3rd bearing (53) on the preceding coil holder (60), the permanent magnetism of the rotor assembly (30) Body component (32) is located at the interior intracavitary of the stator core (21) of the stator module (20), and the fan blade (40) is located at the wind Road shell (10) is interior and is fixed on the rear end of the shaft (31).

2. there are three the brushless motors of bearing for dress according to claim 1, it is characterised in that:

The first central through hole (111) of the bearing fixed block (11) and the air duct shell (10) possess common central axis Line.

3. there are three the brushless motors of bearing for dress according to claim 1, it is characterised in that:

It further include using rear coil holder (70) made of engineering plastics, the rear coil holder (70) is arranged in the air duct shell (10) on the stator core (21) of the stator module (20) in.

4. there are three the brushless motors of bearing for dress according to claim 1, it is characterised in that:

It is greater than to be located in the air duct shell (10) positioned at the length of the stator module (20) of the air duct shell (10) outside and determines The length of sub-component (20).

5. there are three the brushless motors of bearing for dress according to claim 1, it is characterised in that:

It further include terminal plate (99), more pieces of contact pins (98) and plug (97)；More pieces of respective one end of contact pin (98) respectively with it is described The stator winding of stator module (20) is electrically connected, and the respective other end is electrically connected with the terminal plate (99) respectively and fixes this and connects Line plate (99)；Plug (97) electrical connection is fixed on the terminal plate (99).

6. there are three the brushless motors of bearing for dress according to claim 1, it is characterised in that:

It further include fixed bracket (80), which includes cylinder type rear end (81) and be connected with the rear end (81) The cylinder type front end (82) connect, the outer diameter of the front end (82) are greater than the outer diameter of the rear end (81), the front end Portion (82) is equipped with the first cavity (821) for being used to accommodate the stator module (20) rear portion, and the rear end (81), which is equipped with, to be used to Accommodate the second central through hole (811) of the first bearing (51) and second bearing (52)；The rear end of the fixed bracket (80) In the first central through hole (111) for the bearing fixed block (11) that portion (81) insertion is fixed on the air duct shell (10), described the One bearing (51) and second bearing (52) are mounted on the second central through hole (811) of the rear end (81) of the fixed bracket (80) Interior, stator module (20) rear portion is fixed in the first cavity (821) of the front end (82) of the fixed bracket (80).

7. there are three the brushless motors of bearing for dress according to claim 6, it is characterised in that:

The front end (82) of the fixed bracket (80) is equipped with notch (823) at least one.

8. according to claim 1 to 7 described in any item dresses there are three bearing brushless motor, it is characterised in that:

It further include the elastic element (59) being mounted between the first bearing (51) and second bearing (52).