CN211242047U - Inner rotor brushless motor and air blowing cylinder with same - Google Patents

Abstract

The utility model discloses an inner rotor brushless motor and have a section of thick bamboo of blowing of this motor, wherein, the motor includes stator module, rotor subassembly, the after-poppet, fore-stock and control circuit board, the rotor subassembly is rotationally installed in stator module, the after-poppet, the before-poppet is located stator module's both ends respectively, the control circuit board card is located the after-poppet, and, the after-poppet includes the diapire that is hollow out construction and the lateral wall of connecting in the diapire, the outer wall of lateral wall is protruding to be equipped with a plurality of guide vanes, a plurality of guide vanes are evenly distributed along the external diameter of lateral wall, form first wind-guiding passageway between the two adjacent guide vanes; therefore, when the rotating shaft drives the fan blades to rotate and generate airflow to flow through the first air guide channel, the airflow is further rotated and accelerated, and when the inner rotor brushless motor is applied to the air blowing cylinder, the air blowing cylinder has better user experience.

Description

Inner rotor brushless motor and air blowing cylinder with same

Technical Field

The utility model relates to a section of thick bamboo technical field of blowing especially relates to a section of thick bamboo of blowing and inner rotor brushless motor that enough wind that makes a section of thick bamboo of blowing blow out concentrated the certain distance that flows.

Background

The air blowing cylinder has become an essential electric appliance in life, various functions of the air blowing cylinder are developed at present, but energy conservation and good user experience are always the development direction of the air blowing cylinder. Generally, a motor, a fan blade and a heating element are arranged in the blowing cylinder, when the motor drives the fan blade mounted on the blowing cylinder to rotate, air is sucked from an air inlet to form an air flow, and then the air flow is blown out from the blowing nozzle, in the process, if the heating element is electrified and heated, hot air is blown out, otherwise, if the heating element is not electrified and heated, cold air is blown out.

In the working process of the air blowing cylinder, if the air blown out by the air blowing nozzle can intensively flow for a distance, the effects of better drying, modeling and the like can be achieved, but the air blown out by the existing air blowing cylinder through the air blowing nozzle can not intensively flow, so that the good user experience can not be achieved. In addition, if the distance for the concentrated flowing of the air blown out by the air blowing nozzle is too large, larger air volume and air pressure are needed, the energy consumption of the motor is correspondingly increased, meanwhile, the air blowing nozzle is easy to heat, and a user can be scalded when the air blowing nozzle is touched carelessly; if the distance is too small, the air blower needs to be closer to the object to be blown to achieve the desired effect, which causes inconvenience in use on the one hand and easily causes interference with the object to be blown on the other hand, for example, when blowing hair, the hair is easily sucked into the air inlet, causing great inconvenience.

Therefore, it is necessary to provide a blowing cylinder and an inner rotor brushless motor thereof, which have low energy consumption and better user experience, so as to ensure that the wind blown out from the blowing cylinder can intensively flow for a certain distance, thereby solving the problems in the prior art.

Disclosure of Invention

An object of the utility model is to provide a can make the wind that a section of thick bamboo of blowing blew off concentrate the mobile certain distance and the little inner rotor brushless motor of energy consumption.

An object of the utility model is to provide a can make its wind that blows off concentrate and flow certain distance and

the energy consumption is little to the section of thick bamboo of blowing to promote user's use experience.

In order to achieve the above purpose, the technical scheme of the utility model is that: an inner rotor brushless motor is provided, which comprises a stator component, a rotor component, a rear bracket, a front bracket and a control circuit board; the stator assembly comprises a stator core, a front wire frame and a rear wire frame which are arranged at two ends of the stator core, and a plurality of coil windings which are wound on the stator core and supported by the front wire frame and the rear wire frame; the rotor assembly comprises a rotating shaft, a rotor core fixedly connected with the rotating shaft, a magnet arranged outside the rotor core, a front end plate and a rear end plate, wherein the front end plate and the rear end plate are arranged at two ends of the rotor core and respectively fixedly connected with the rotating shaft; the rear support comprises a bottom wall in a hollow structure and a side wall connected to the bottom wall, a containing cavity for containing the stator assembly is formed between the bottom wall and the side wall, one end of the rotating shaft is rotatably connected to the bottom wall, a plurality of air guide sheets are convexly arranged on the outer wall surface of the side wall, the air guide sheets are uniformly distributed along the outer diameter of the side wall, and a first air guide channel is formed between every two adjacent air guide sheets; the front bracket is clamped outside the stator assembly and connected with the rear bracket, and the other end of the rotating shaft is rotatably connected with the front bracket; the control circuit board is clamped on the rear support and located below the bottom wall, and the control circuit board is electrically connected with the coil winding.

Preferably, each of the air guiding plates is square, fan-shaped or trapezoid, and each of the air guiding plates is straight and radially arranged along the outer diameter of the side wall, or each of the air guiding plates is arc-shaped and is bent in the same forward direction along the outer diameter of the side wall.

Preferably, the outer wall surface of the side wall is further uniformly provided with a plurality of air guide grooves, each air guide groove extends along the height direction of the side wall and penetrates through the top and the bottom of the side wall, and each air guide groove is linear, arc-shaped or spiral.

Preferably, the rear bracket further comprises an installation inner ring arranged in the side wall and connected with the bottom wall, the installation inner ring and the side wall are arranged at intervals, the height of the installation inner ring is smaller than that of the side wall, the installation inner ring and the side wall are connected through a plurality of connecting ribs arranged at intervals, a plurality of second air guide channels which are uniformly distributed along the radial direction of the side wall and are of an arc structure are formed in a gap between the installation inner ring and the side wall, and the air guide sheets are convexly arranged on the outer side of the side wall.

Preferably, the bottom wall of the rear bracket includes a first hub portion disposed at a middle portion thereof, and a plurality of spokes connected between the first hub portion and the mounting inner ring, and the first hub portion is used for mounting a bearing connected to one end of the rotating shaft.

Preferably, the rear bracket further comprises two mounting lugs, a plurality of mounting feet and a positioning hook, wherein the two mounting lugs are convexly arranged on the outer wall surface of the side wall and are oppositely arranged, each mounting lug is provided with a first mounting hole, a second mounting hole and two positioning columns, the two positioning columns are convexly arranged on the side part of the second mounting hole, the positioning columns are connected with the front bracket and are multiple, the mounting feet are uniformly and convexly arranged on the bottom of the side wall, the positioning hook is convexly arranged on the bottom of the side wall and is provided with a hooking part, and the mounting feet, the positioning hook and the control circuit board are clamped.

Preferably, the front bracket includes a top plate, side plates connected to two ends of the top plate, and a fixing plate connected to one end of the side plate far from the top plate, the fixing plate and the top plate are bent in opposite directions with respect to the side plates, a second boss portion for mounting a bearing connected to the other end of the rotating shaft is disposed in the middle of the top plate, and a third mounting hole opposite to the second mounting hole and a positioning notch corresponding to the positioning post are formed in the fixing plate.

Preferably, the stator core includes an outer ring portion, a plurality of winding portions protruding from the outer ring portion, and pole shoes disposed on each of the winding portions, a winding slot is formed between two adjacent winding portions, two adjacent pole shoes are spaced apart from each other and form a winding slot opening, the coil winding is wound on the winding portions and accommodated in the winding slot, and a positioning slot for matching with the front bracket is disposed on an outer wall surface of the outer ring portion.

Preferably, the front line frame comprises a first line frame body in an annular shape, and first inserting parts which are convexly arranged on one side of the first line frame body and correspond to the winding grooves in shape, and a first supporting beam corresponding to the winding part is formed between every two adjacent first inserting parts; the rear wire frame comprises a second wire frame body in an annular shape, second inserting parts which are convexly arranged on one side of the second wire frame body and are matched with the first inserting parts in an inserting mode, and a second supporting beam is formed between every two adjacent second inserting parts; the front wire frame and the rear wire frame are respectively arranged at two ends of the stator core, the first insertion part and the second insertion part are fixedly inserted, and the coil winding is contained in the first insertion part and the second insertion part and supported by the first supporting beam and the second supporting beam.

Correspondingly, the utility model also provides a section of thick bamboo of blowing, it is including the dryer shell that has air intake, air outlet, locate the operating button of dryer shell, locate heating element and inner rotor brushless motor in the dryer shell, wherein, heating element locates and closes on the position of air outlet, inner rotor brushless motor locate the position that closes on the air intake, and the protruding stretching of inner rotor brushless motor's pivot the flabellum is installed to the one end of fore-stock, the flabellum closes on the air intake, inner rotor brushless motor drives when the flabellum rotates, make the air by the air intake gets into and flows through behind the first wind channel by the air outlet blows off.

Compared with the prior art, because the utility model discloses an inner rotor brushless motor, it has stator module and rotates the rotor subassembly of locating in the stator module, stator module's both ends are equipped with the fore-stock respectively, the after-poppet, the card is equipped with control circuit board below the after-poppet, and, the outer wall of the lateral wall of after-poppet is protruding to be equipped with a plurality of guide vanes, a plurality of guide vanes are along the external diameter evenly distributed of its lateral wall, form first wind-guiding passageway between two adjacent guide vanes, therefore, when this inner rotor brushless motor drives the flabellum and rotates, will make the air form the air current and flow to control circuit board direction along the flabellum, in this process, the air current passes through the first wind-guiding passageway between two guide vanes, first wind-guiding passageway makes the air current further rotate and accelerate, thereby make this air current can concentrate the flow 20-30cm distance about, and the wind speed, The wind pressure reaches 500-600Pa, the wind rate reaches 800-0ft/min, the wind rate is large, the energy consumption is low, and the inner rotor brushless motor has a compact and reasonable structure. Correspondingly, the air blowing cylinder adopting the inner rotor brushless motor also has the same technical effect, and the air blown by the air blowing cylinder can intensively flow for a distance of about 20-30cm, so that a user can keep a proper distance when using the air blowing cylinder, and the air blowing cylinder has better user experience and smaller energy consumption.

Drawings

Fig. 1 is a schematic structural diagram of an inner rotor brushless motor according to the present invention.

Fig. 2 is an exploded view of fig. 1.

Fig. 3 is an exploded view of the rotor assembly of fig. 2.

Fig. 4 is an exploded view of the stator assembly of fig. 2.

Fig. 5 is a top view of the stator core of fig. 4.

Fig. 6 is a schematic view of the front bracket of fig. 2 at another angle.

Fig. 7 is a schematic view of the rear bracket of fig. 2 at another angle.

Fig. 8 is a schematic view of the structure of fig. 7 from another angle.

Fig. 9 is a top view of fig. 7.

Fig. 10 is a schematic structural view of another embodiment of the middle and rear brackets of the present invention.

Fig. 11 is a schematic structural view of another embodiment of the middle and rear brackets of the present invention.

Fig. 12 is a schematic structural view of the utility model blower.

Detailed Description

Embodiments of the present invention will now be described with reference to the drawings, wherein like element numerals represent like elements throughout.

Referring first to fig. 1 to 12, the present invention provides an inner rotor brushless motor 100, which is mainly suitable for a blower tube 200, but not limited thereto, and can be used in other similar airflow generating devices as required.

Referring to fig. 1-2, an inner rotor brushless motor 100 according to the present invention includes a rotor assembly 110, a stator assembly 120, a front bracket 130, a rear bracket 140, and a control circuit board 150. The rotor assembly 110 is rotatably mounted in the stator assembly 120, the front bracket 130 and the rear bracket 140 are respectively mounted at two ends of the stator assembly 120 and fixed by screws, and the control circuit board 150 is clamped in the rear bracket 140 and electrically connected to the stator assembly 120.

As shown in fig. 1-3, the rotor assembly 110 of the present invention includes a rotating shaft 111, a rotor core 112 fastened to the rotating shaft 111, a magnet 113 fixed to the rotor core 112 and disposed outside the rotor core 112, and a front end plate 114 and a rear end plate 115 disposed at two ends of the rotor core 112, wherein the front end plate 114 and the rear end plate 115 are further fastened to the rotating shaft 111 respectively, the rotor core 112 and the magnet 113 are rotatably mounted in the stator assembly 120, two ends of the rotating shaft 111 are mounted on the front bracket 130 and the rear bracket 140 through two bearings 160 respectively, and one end of the rotating shaft 111 protrudes out of the front bracket 130 and is used for mounting fan blades.

As shown in fig. 1-2 and 4-5, the stator assembly 120 includes a stator core 121, a front bobbin 122 and a rear bobbin 123 disposed at two ends of the stator core 121, and a plurality of coil windings 124 wound around the stator core 121 and supported by the front bobbin 122 and the rear bobbin 123. The stator core 121 includes an outer ring portion 1211, a plurality of winding portions 1212 protruding from the outer ring portion 1211, and pole shoes 1213 disposed on each of the winding portions 1212, a winding slot 1214 is formed between two adjacent winding portions 1212, the two adjacent pole shoes 1213 are spaced apart from each other to form a winding slot opening 1215, the number of coil windings 124 corresponds to the number of winding portions 1212, and each coil winding 124 is wound on one winding portion 1212 and is received in the winding slots 1214 on two sides. Further, a positioning groove 1216 is recessed in an outer wall surface of the outer ring portion 1211 of the stator core 121, and the positioning groove 1216 is adapted to be engaged with the front bracket 130 (described later in detail).

With continued reference to fig. 2 and fig. 4 to 5, the front wire frame 122 includes a first wire frame body 1221 having a ring shape, first plugging portions 1222 protruding from the lower side of the first wire frame body 1221 and corresponding to the shape of the wire winding slot 1214, and a first supporting beam 1223 corresponding to the wire winding portion 1212 is formed between two adjacent first plugging portions 1222. Correspondingly, the rear bobbin 123 includes a second bobbin body 1231, a second inserting portion 1232 protruding from the upper side of the second bobbin body 1231 and engaged with the first inserting portion 1222, and a second supporting beam 1233 is formed between two adjacent second inserting portions 1232. The front bobbin 122 and the rear bobbin 123 are respectively disposed at two ends of the stator core 121, and after the first inserting portion 1222 and the second inserting portion 1232 are tightly inserted, the coil winding 124 is accommodated in the first inserting portion 1222 and the second inserting portion 1232 and supported by the first supporting beam 1223 and the second supporting beam 1233.

As shown in fig. 2 and 6, the front bracket 130 includes a top plate 131, side plates 132 connected to two ends of the top plate 131, and a fixing plate 133 connected to one end of the side plate 132, which is far away from the top plate 131, wherein the fixing plate 133 and the top plate 131 are bent in opposite directions with respect to the side plate 132, a second boss 1311 for mounting the bearing 160 is disposed in the middle of the top plate 131, a third mounting hole 1331 is disposed on the fixing plate 133, and a positioning notch 1332 is disposed at a side edge of the fixing plate 133. When the front bracket 130 is clamped on the stator assembly 120 and connected to the rear bracket 140, the positioning notch 1332 of the fixing plate 133 is used for positioning with the rear bracket 140 to ensure that the third mounting hole 1331 and the second mounting hole 1482 of the rear bracket 140 correspond (see details later), so as to facilitate the fixed connection between the two.

As shown in fig. 5-6, a positioning protrusion 1321 corresponding to the positioning groove 1216 is protruded on an inner side of the side plate 132 of the front bracket 130, and after the front bracket 130 is clamped on the stator assembly 120, the positioning protrusion 1321 thereon is clamped in the positioning groove 1216 of the stator core 121, so as to position the front bracket 130 and the stator core 121.

As shown in fig. 2 and fig. 7 to 9, the rear bracket 140 of the present invention includes a hollow bottom wall 141 and a side wall 142 connected to the bottom wall 141 and having an annular structure, a containing cavity for containing the stator assembly 120 is defined between the bottom wall 141 and the side wall 142, the other end of the rotating shaft 111 is rotatably connected to the bottom wall 141 through a bearing 160, a plurality of wind-guiding sheets 143 are convexly disposed on an outer wall surface of the side wall 142, the plurality of wind-guiding sheets 143 are uniformly distributed along an outer diameter of the side wall 142, and a first wind-guiding channel 144 is formed between two adjacent wind-guiding sheets 143; the number of the air guiding sheets 143 can be flexibly set according to the requirement.

The utility model discloses in, the guide vane 143 can be square, fan-shaped or trapezoidal etc to each guide vane 143 can be straight plate form, arc form or other shapes, and when being straight plate form, each guide vane 143 is followed the external diameter of lateral wall 142 is radially arranged, and when being arc form, each guide vane 143 is followed the same cisoid of outer radial of lateral wall 142 is crooked.

For example, in one embodiment, the air guiding sheet 143 has a square structure, one side of the air guiding sheet 143 in the width direction is connected to the side wall 142, two ends of the air guiding sheet 143 in the length direction are bent toward each other to form an arc shape, and the air guiding sheets 143 connected to the side wall 142 are bent in the same forward direction along the outer diameter of the side wall 142. Thus, when the rotating shaft 111 drives the fan blades thereon to rotate to generate an air flow, the air flow passes through the first air guiding channel 144 formed between the air guiding sheets 143 when passing through the rear bracket 140, so as to enhance the rotation and speed of the air flow, thereby ensuring that the air flow can flow intensively for a certain distance. For example, in this embodiment, six arc-shaped wind-guiding plates 143 are uniformly distributed on the side wall 142 of the rear bracket 140, so that the air flow generated by the inner rotor brushless motor 100 can intensively flow for a distance of about 25 cm.

With continued reference to fig. 7-9, the rear bracket 140 further includes an inner mounting ring 145 disposed in the sidewall 142 and connected to the bottom wall 141, the inner mounting ring 145 and the sidewall 142 are disposed at intervals and have a height smaller than the height of the sidewall 142, the inner mounting ring 145 and the sidewall 142 are connected by a plurality of connecting ribs 146 disposed at intervals, a plurality of second air guide channels 147 (see fig. 9) uniformly distributed along the radial direction of the sidewall 142 and having an arc structure are formed in a gap between the inner mounting ring 145 and the sidewall 142, and the rotation and speed of the airflow are further enhanced by the second air guide channels 147, so that the airflow can intensively flow for a longer distance. For example, in the present embodiment, six second air guide passages 147 are formed in the rear bracket 140 so as to be uniformly distributed, but the number of the second air guide passages 147 is not limited to this.

With continued reference to fig. 2 and 7-9, the bottom wall 141 of the rear bracket 140 includes a first hub portion 1411 disposed at a middle portion thereof, and a plurality of spokes 1412 connected between the first hub portion 1411 and the inner mounting ring 145, wherein the first hub portion 1411 is used for mounting the bearing 160 connected to one end of the rotating shaft 111. The bottom of the sidewall 142 is further convexly provided with a plurality of mounting feet 1421 and a pair of positioning hooks 1422, the mounting feet 1421 are uniformly convexly provided at the bottom of the sidewall 142, the two positioning hooks 1422 are symmetrically convexly provided at the bottom of the sidewall 142, and each positioning hook 1422 has a hooking portion 1422 a.

Referring to fig. 1-2, the control circuit board 150 is provided with a first slot 151 corresponding to the mounting pin 1421 and a second slot 152 corresponding to the positioning hook 1422, the mounting pin 1421 is engaged with the first slot 151 to connect the control circuit board 150, the positioning hook 1422 is engaged with the second slot 152, and the hook portion 1422a abuts against the lower surface of the control circuit board 150.

Referring to fig. 2 and 7-9 again, the rear bracket 140 further includes two mounting lugs 148, the two mounting lugs 148 are protruded from the outer wall surface of the side wall 142 and are disposed opposite to each other, each mounting lug 148 is provided with a first mounting hole 1481, a second mounting hole 1482 and two positioning posts 1483, the second mounting hole 1482 corresponds to the third mounting hole 1331 of the front bracket 130, and the two positioning posts 1483 are protruded from the side of the second mounting hole 1482 and correspond to the positioning notches 1332. After the front bracket 130 is fastened to the rear bracket 140, the positioning of the fixing plate 133 is fastened to the positioning notch 1332 of the notch 1332 to realize positioning, so as to ensure that the third mounting hole 1331 is aligned with the second mounting hole 1482, which is convenient for connecting the fixing plate 133 to the mounting lug 148.

Referring now to fig. 10-11, in another embodiment of the rear bracket 140 of the present invention, the only difference from the above embodiment is: the outer wall surface of the sidewall 142 is further provided with a plurality of air guiding grooves 149 uniformly, each air guiding groove 149 extends along the height direction of the sidewall 142 and penetrates through the top and the bottom of the sidewall, the air guiding groove 149 may be linear (see fig. 10), arc-shaped (see fig. 11) or spiral, and of course, the air guiding groove 149 is not limited to the aforementioned shape, and may be provided in other shapes as required. The rotation and speed of the airflow flowing through the first air guiding channel 144 are further enhanced by the air guiding groove 149, so as to further ensure the distance for the airflow to flow intensively. Other identical parts will not be described repeatedly.

Referring to fig. 12, the utility model provides a section of thick bamboo 200 of blowing still, it is including the dryer shell 210 that has air intake 211, air outlet 212, locate dryer shell 210's operating button 220, locate heating element and inner rotor brushless motor 100 in the dryer shell 210, wherein, heating element locates and closes on the position of air outlet 212, inner rotor brushless motor 100 locate the position that closes on air intake 211, and the flabellum is installed to the one end of the protruding fore-stock 130 that stretches out of pivot 111 of inner rotor brushless motor 100, and the flabellum closes on air intake 211 to, heating element, the conventional mode in this field of all not having been gone up to the mode that sets up of flabellum, no longer redundantly. When the inner rotor brushless motor 100 of the present invention drives the fan blades rotate, the air is made to flow through the first air guiding channel 144 and the second air guiding channel 147 in the air duct housing 210 from the air inlet 211 and then blown out from the air outlet 212.

The operation principle of the inner rotor brushless motor 100 applied to the air blowing cylinder 200 will be described below with reference to fig. 1 to 12.

When the air blowing tube 200 starts to work, the control circuit board 150 of the inner rotor brushless motor 100 controls the stator assembly 120 to be powered on, so that the rotor assembly 110 rotates, and thereby the fan blades on the rotating shaft 111 are driven to rotate, the fan blades rotate to suck air into the air duct housing 210 from the air inlet 211 and form air flow, the air flow flows towards the rear bracket 140 along the direction indicated by arrows in fig. 1 and 7, when the air flow flows through the rear bracket 140, the rotation and the speed of the air flow are enhanced again through the first air guide channels 144 and the second air guide channels 147, and then the air flow is blown out from the air outlet 212, so that the air flow can be enabled to flow in a centralized manner for a certain distance. The utility model discloses in, through the additional action of six first wind-guiding passageways 144 and six second wind-guiding passageways 147, can make the air current that produces through this inner rotor brushless motor 100 can concentrate the distance about 25cm that flows to the wind speed of this air current reaches 14-17m/s, the wind pressure reaches 500 and supplyes 600Pa, the amount of wind reaches 800 and supplyes 1000ft/min, the user can keep a moderate distance when using, consequently has better user experience.

Furthermore, if the air guiding groove 149 is further disposed on the outer wall of the rear bracket 140, when the air flows through the first air guiding channel 144, the rotation and speed of the air guiding groove 149 are further enhanced, so that the air flow blown out from the air outlet 212 is concentrated and kept for a longer distance, for example, a distance of about 30 cm.

In summary, the inner rotor brushless motor 100 of the present invention has the stator assembly 120 rotatably disposed in the rotor assembly 110 of the stator assembly 120, the front support 130 and the rear support 140 are respectively disposed at two ends of the stator assembly 120, the control circuit board 150 is clamped below the rear support 140, and the plurality of air guiding plates 143 are convexly disposed on the outer wall surface of the sidewall 142 of the rear support 140, the plurality of air guiding plates 143 are uniformly distributed along the outer diameter of the sidewall 142 thereof, and the first air guiding channel 144 is formed between two adjacent air guiding plates 143, so that when the inner rotor brushless motor 100 drives the fan blades to rotate, the air forms an air flow and flows toward the control circuit board 150 along the fan blades, in this process, the air flow passes through the first air guiding channel 144 between the two air guiding plates 143, the first air guiding channel 144 further rotates and accelerates the air flow, thereby enabling the air flow to flow at a distance of about 20-30cm, and the wind speed reaches 14-17m/s, the wind pressure reaches 500-600Pa, the wind rate reaches 800-1000ft/min, the wind rate is large, the energy consumption is low, and meanwhile, the inner rotor brushless motor 100 has a compact and reasonable structure.

Correspondingly, the air blowing cylinder 200 adopting the inner rotor brushless motor 100 also has the same technical effect, and the air blown by the air blowing cylinder can intensively flow for a distance of about 20-30cm, so that a user can keep a moderate distance when using the air blowing cylinder, and the air blowing cylinder has better user experience and smaller energy consumption.

The structures of the other parts of the air blowing cylinder 200 and the inner rotor brushless motor 100 according to the present invention are well known to those skilled in the art, and will not be described in detail herein.

The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the invention, therefore, the invention is not limited thereto.

Claims (10)

1. An inner rotor brushless motor adapted for a blower cartridge, comprising:

the stator assembly comprises a stator core, a front wire frame and a rear wire frame which are arranged at two ends of the stator core, and a plurality of coil windings which are wound on the stator core and supported by the front wire frame and the rear wire frame;

the rotor assembly comprises a rotating shaft, a rotor core fixedly connected with the rotating shaft, a magnet arranged outside the rotor core, a front end plate and a rear end plate, wherein the front end plate and the rear end plate are arranged at two ends of the rotor core and respectively fixedly connected with the rotating shaft;

the rear support comprises a bottom wall in a hollow structure and a side wall connected to the bottom wall, an accommodating cavity for accommodating the stator assembly is formed between the bottom wall and the side wall, one end of the rotating shaft is rotatably connected to the bottom wall, a plurality of air guide sheets are convexly arranged on the outer wall surface of the side wall, the plurality of air guide sheets are uniformly distributed along the outer diameter of the side wall, and a first air guide channel is formed between every two adjacent air guide sheets;

the front bracket is clamped outside the stator assembly and connected with the rear bracket, and the other end of the rotating shaft is rotatably connected with the front bracket;

and the control circuit board is clamped on the rear support and positioned below the bottom wall, and the control circuit board is electrically connected with the coil winding.

2. The inner rotor brushless motor of claim 1, wherein each of the air-guiding plates is square, fan-shaped or trapezoid, and each of the air-guiding plates is straight and radially arranged along an outer diameter of the sidewall or each of the air-guiding plates is arc-shaped and is curved in a same forward direction along the outer diameter of the sidewall.

3. The inner rotor brushless motor of claim 1, wherein the outer wall surface of the sidewall is further uniformly formed with a plurality of air guiding grooves, each air guiding groove extends along the height direction of the sidewall and penetrates the top and the bottom of the sidewall, and each air guiding groove is linear, arc-shaped or spiral.

4. The inner rotor brushless motor of claim 1, wherein the rear bracket further includes an inner mounting ring disposed in the sidewall and connected to the bottom wall, the inner mounting ring is spaced apart from the sidewall and has a height smaller than that of the sidewall, the inner mounting ring and the sidewall are connected by a plurality of connecting ribs disposed at intervals, a plurality of second wind guide channels are formed in a gap between the inner mounting ring and the sidewall, the second wind guide channels are uniformly distributed along a radial direction of the sidewall and have an arc structure, and the wind guide plates are protruded outside the sidewall.

5. The inner rotor brushless motor of claim 4, wherein the bottom wall of the rear bracket includes a first hub portion disposed at a center thereof for mounting a bearing coupled to an end of the shaft, and a plurality of spokes coupled between the first hub portion and the inner mounting ring.

6. The brushless motor with inner rotor of claim 1, wherein the rear bracket further includes two mounting lugs, a plurality of mounting pins and a positioning hook, the two mounting lugs are protruded from the outer wall surface of the side wall and are oppositely disposed, each mounting lug is provided with a first mounting hole, a second mounting hole and two positioning posts, the two positioning posts are protruded from the side portion of the second mounting hole and are connected to the front bracket through the positioning posts and the second mounting hole, the plurality of mounting pins are uniformly protruded from the bottom of the side wall, the positioning hook is protruded from the bottom of the side wall and has a hook portion, and the mounting pins and the positioning hook are connected to the control circuit board.

7. The inner rotor brushless motor of claim 6, wherein the front bracket includes a top plate, side plates connected to both ends of the top plate, and a fixing plate connected to one end of the side plates away from the top plate, and the fixing plate and the top plate are bent in opposite directions with respect to the side plates, a second boss for mounting a bearing connected to the other end of the rotating shaft is provided in the middle of the top plate, and the fixing plate is provided with a third mounting hole opposite to the second mounting hole and a positioning notch corresponding to the positioning post.

8. The inner rotor brushless motor of claim 1, wherein the stator core includes an outer ring portion, a plurality of winding portions protruding from the outer ring portion, and a pole piece disposed in each of the winding portions, a winding slot is formed between two adjacent winding portions, the two adjacent pole pieces are spaced apart from each other to form a winding slot opening, the coil winding is wound on the winding portions and received in the winding slot, and a positioning groove for engaging with the front bracket is formed on an outer wall surface of the outer ring portion.

9. The inner rotor brushless motor of claim 8, wherein the front bobbin includes a first bobbin body having a ring shape, first insertion parts protruding from one side of the first bobbin body and corresponding to the shape of the winding slot, and first support beams corresponding to the winding parts are formed between two adjacent first insertion parts; the rear wire frame comprises a second wire frame body in an annular shape, second inserting parts which are convexly arranged on one side of the second wire frame body and are matched with the first inserting parts in an inserting mode, and a second supporting beam is formed between every two adjacent second inserting parts; the front wire frame and the rear wire frame are respectively arranged at two ends of the stator core, the first insertion part and the second insertion part are fixedly inserted, and the coil winding is contained in the first insertion part and the second insertion part and supported by the first supporting beam and the second supporting beam.

10. A blowing tube, including the dryer shell that has air intake, air outlet and locate the operating button of dryer shell, the position that is close to in the dryer shell the air outlet is equipped with heating element, its characterized in that still includes the inner rotor brushless motor of any one of claims 1-9, the inner rotor brushless motor install in the dryer shell and the protruding one end that stretches out of its pivot the fore-stock install the flabellum, the flabellum is close to the air intake, when the inner rotor brushless motor drives the flabellum rotates, make the air get into and flow through by the air inlet after the first wind-guiding passageway blow out by the air outlet.

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