CN219229738U - High-speed brushless motor for dust collection - Google Patents

Abstract

The high-speed brushless motor for dust collection comprises a shell, a central rotating shaft, a magnetic ring, an iron core stator, a coil, a bearing post and a movable wind wheel, wherein the shell is provided with an air inlet and an air outlet; the central rotating shaft is rotatably arranged in the shell; the magnetic ring is fixedly sleeved on the central rotating shaft; the iron core stator is fixedly arranged in the shell and surrounds the outside of the magnetic ring; the coil is sleeved on the iron core stator; the bearing post is arranged in the shell, sleeved on the central rotating shaft and in rotating connection with the central rotating shaft; the movable wind wheel is arranged in the shell and is positioned at the air inlet, and the movable wind wheel is fixedly connected with the end part of the central rotating shaft. The high-speed brushless motor for dust collection has the characteristics of stable structure, high running speed, long service life, safety and reliability, and can also increase the stability and concentricity of the motor and reduce noise in running because the bearing post is arranged on the central rotating shaft.

Description

High-speed brushless motor for dust collection

[ field of technology ]

The utility model relates to a motor, in particular to a high-speed brushless motor for dust collection.

[ background Art ]

The dust collector is a cleaning electric appliance which uses a motor to drive a blade to rotate at a high speed and generates air negative pressure in a shell so as to suck sundries such as dust and scraps into a dust collecting container. The motor of the dust collector is a core component of the dust collector and consists of two parts, namely a motor part and a fan part. The motor of the dust collector has very high requirement on the rotating speed, the conventional electric fan of the dust collector generally uses a brush motor, the rotating speed is usually 20000-40000, and the rotating speed can meet the requirement of the electric fan of the dust collector, but the commutator of the brush motor has the advantages of quick abrasion, short service life, high noise and low performance. With the improvement of the energy consumption standard in the dust collector industry and the demand of consumers for the small size of the portable dust collector, how to make the dust collector motor satisfy the requirements of small size and improve the efficiency when in silence becomes a great technical problem in the industry.

[ utility model ]

The present utility model is to solve the above-described problems and to provide a high-speed brushless motor for dust collection.

In order to solve the problems, the utility model provides a high-speed brushless motor for dust collection, which is characterized by comprising a shell, a central rotating shaft, a magnetic ring, an iron core stator, a coil, a bearing post and a movable wind wheel, wherein the shell is provided with an air inlet and an air outlet; the central rotating shaft is rotatably arranged in the shell; the magnetic ring is fixedly sleeved on the central rotating shaft; the iron core stator is fixedly arranged in the shell and surrounds the outside of the magnetic ring; the coil is sleeved on the iron core stator; the bearing post is arranged in the shell, sleeved on the central rotating shaft and in rotating connection with the central rotating shaft; the movable wind wheel is arranged in the shell and is positioned at the air inlet, and the movable wind wheel is fixedly connected with the end part of the central rotating shaft.

Further, the bearing post is located the non-tip of center pivot, the bearing post includes bearing frame and first bearing, second bearing, the bearing frame is cylindricly, and its both ends along the axial are equipped with first bearing groove and second bearing groove respectively, first bearing groove and second bearing groove link up through the center shaft hole, first bearing is located in the first bearing groove, the second bearing is located in the second bearing groove, the aperture in center shaft hole with center pivot phase-match.

Further, a third bearing groove is formed in the shell, a third bearing is arranged in the third bearing groove, and the third bearing is sleeved at one end, far away from the movable wind wheel, of the central rotating shaft.

Further, the movable wind wheel comprises a baffle plate part, a first blade part and a kettle part, wherein the baffle plate part is fixedly sleeved on the central rotating shaft and is opposite to the air inlet in position interval; the first blade part comprises a plurality of first unit blades which are distributed in a vortex manner along the circumferential direction, the first unit blades are vertically arranged on the surface of one side of the baffle part, which faces the air inlet, and the first unit blades are spaced to form a first channel; the kettle mouth part is connected to one end of the first blade part opposite to the baffle part, and is provided with a kettle mouth hole in a kettle mouth shape, and the kettle mouth hole penetrates through the first channel and the air inlet.

Further, a static wind wheel is fixedly connected in the shell, the static wind wheel comprises a cylinder wall part, a ring gear part and a second blade part, the cylinder wall part is in a cylinder shape with two open ends, and the cylinder wall part is matched with the inner wall of the shell; the ring baffle part is in a surrounding shape, is positioned in the cylinder wall part and is spaced from the cylinder wall part; the second blade part comprises a plurality of rotary blades, the rotary blades are connected between the cylinder wall part and the annular baffle part at intervals, a second channel is formed between the rotary blades, and the second channel is communicated with the first channel;

further, the shell comprises a first shell and a second shell, wherein one end of the first shell is provided with the air outlet, and one end of the second shell is provided with the air inlet; the cylinder wall is characterized in that a lap joint edge part is arranged on the circumferential outer wall of the cylinder wall, the lap joint edge part is clamped between the first shell and the second shell, and two ends of the cylinder wall are respectively matched with the inner walls of the first shell and the second shell.

Further, the first shell comprises a first cylinder part, a second cylinder part, a third cylinder part, a first grid part and a second grid part which are integrally formed, and the first cylinder part is cylindrical with two open ends; the second cylinder part is cylindrical with two open ends, is positioned in the first cylinder part, is coaxial with the first cylinder part and is spaced from the first cylinder part; the third cylinder part is cylindrical with two open ends, is positioned in the second cylinder part, is coaxial with the second cylinder part and is spaced from the second cylinder part; the third cylinder part is provided with a fourth bearing groove and a through hole which are arranged along the axial direction, and the through hole penetrates through the fourth bearing groove; the first grid part is provided with first grid holes which penetrate through the air outlet and the second channel; the first grid part is connected between the first cylinder part and the second cylinder part; and a second grid part connected between the second cylinder part and the third cylinder part.

Further, the static wind wheel comprises a connecting part, the connecting part is connected to the inner side of the ring gear part, and a plurality of fixing holes for fixedly connecting with the first shell and connecting holes coaxially arranged with the cylinder wall part are formed in the connecting part; the connecting hole of the static wind wheel is coaxially sleeved on the third cylinder part of the first shell; a plurality of connecting columns are arranged between the second grid parts of the first shell, and the connecting columns are fixed at the fixing holes of the static wind wheel through screws; the bearing column is arranged in a fourth bearing groove of the first shell; the end part of the central rotating shaft penetrates through the central through hole of the first shell and is fixedly connected with the movable wind wheel.

Further, one end of the second cylinder part far away from the second shell is provided with a plurality of first fixing columns extending along the axial direction, and one end of the first cylinder part far away from the second shell is provided with a plurality of second fixing columns extending along the axial direction; an insulating sleeve is sleeved outside the iron core stator, and the insulating sleeve is fixed on the first fixing column through a screw; the shell further comprises an end cover, the end cover is fixed on the second fixing column, and an air outlet is formed between the end cover and the first shell.

Further, a first cushion block and a second cushion block are respectively arranged on two sides of the baffle plate part of the movable wind wheel, the first cushion block is sleeved on the central rotating shaft, one end of the first cushion block is inserted into the through hole of the first shell, and the other end of the first cushion block is abutted to the baffle plate part; the second cushion block is sleeved on the central rotating shaft and is abutted against the baffle plate part; and a nut is connected to the end part of the central rotating shaft in a threaded manner, and the nut is abutted with the second cushion block.

The present utility model has an advantageous contribution in that it effectively solves the above-mentioned problems. The high-speed brushless motor for dust collection has the characteristics of stable structure, high running speed, long service life, safety and reliability, and can also increase the stability and concentricity of the motor and reduce noise in running because the bearing post is arranged on the central rotating shaft.

[ description of the drawings ]

Fig. 1 is a schematic view of the overall structure of the present utility model.

Fig. 2 is a schematic diagram of the overall structure of the present utility model.

Fig. 3 is a longitudinal structural cross-sectional view.

Fig. 4 is a transverse cross-sectional view.

Fig. 5 is a schematic exploded view of the structure.

Fig. 6 is a schematic structural view of the first housing.

Fig. 7 is a schematic structural view of a static wind wheel.

Fig. 8 is a schematic plan view of the baffle portion and the first blade portion of the rotor.

Fig. 9 is a schematic plan view of a core stator.

The attached drawings are identified: the housing 10, the air intake 11, the air outlet 12, the third bearing groove 13, the third bearing 14, the first housing 15, the first stepped portion 151, the first grid hole 1551, the first cylinder portion 152, the second cylinder portion 153, the third cylinder portion 154, the fourth bearing groove 1541, the through hole 1542, the first grid portion 155, the first grid hole 1551, the second grid portion 156, the second grid hole 1561, the first fixing post 157, the second fixing post 158, the second housing 16, the second stepped portion 161, the end cover 17, the central rotating shaft 20, the magnetic ring 30, the iron core stator 40, the main body portion 41, the magnetic shoe portion 42, the first cavity 43, the second cavity 44, the coil 50, the bearing post 60, the bearing seat 61, the first bearing 62, the second bearing 63, the central shaft hole 64, the rotor 70, the baffle portion 71, the first blade portion 72, the first unit blade 721, the first port 73, the port hole 731, the first channel 74, the rotor 80, the cylinder wall portion 81, the ring portion 82, the arc plate 822, the notch 822, the second blade portion 83, the second channel portion, the boss portion 83, the first channel portion 831, the first channel portion 84, the boss portion 113, the boss portion 110, the insulator portion 120, the insulator portion 112, the insulator portion 120, the flange portion 110, the insulator portion 120, the flange portion 112, the insulator portion 110, and the flange portion 115.

[ detailed description ] of the utility model

The following examples are further illustrative and supplementary of the present utility model and are not intended to limit the utility model in any way.

As shown in fig. 1 to 9, the high-speed brushless motor for dust collection according to the present utility model includes a housing 10, a central rotating shaft 20, a magnetic ring 30, an iron core stator 40, a coil 50, a bearing post 60, and a rotor 70. Further, it may also include components such as the static wind wheel 80, the end cap 17, and the like.

As shown in fig. 1 to 3, the housing 10 is provided with an air inlet 11 and an air outlet 12. The central rotating shaft 20 is rotatably disposed in the housing 10. The magnetic ring 30 is fixedly sleeved on the central rotating shaft 20, and can rotate synchronously with the central rotating shaft 20. The iron core stator 40 is fixedly arranged in the housing 10 and surrounds the magnetic ring 30. The coil 50 is sleeved on the iron core stator 40. The bearing post 60 is disposed in the housing 10 and sleeved on the central rotating shaft 20 to form a rotational connection with the central rotating shaft 20. The movable wind wheel 70 is disposed in the housing 10 and located at the air inlet 11, and the movable wind wheel 70 is fixedly connected with the end of the central rotating shaft 20. When the coil 50 is energized, it acts on the iron core stator 40 to generate a magnetic field, so as to drive the magnetic ring 30 to rotate, and further drive the movable wind wheel 70 to rotate at a high speed by the central rotating shaft 20. When the movable wind wheel 70 rotates at a high speed, negative pressure is generated at the air inlet 11 to form vacuum, so that suction force is formed to be used for dust collection. Because the bearing post 60 is sleeved on the central rotating shaft 20, the bearing post 60 is arranged on the shell 10, so that the stability and concentricity of the motor can be improved, and the noise in operation can be reduced.

As shown in fig. 3 and 5, the bearing post 60 is further provided at a non-end portion of the central rotating shaft 20, and includes a bearing housing 61, a first bearing 62, and a second bearing 63. The bearing seat 61 is cylindrical, and a first bearing groove and a second bearing groove are respectively arranged at two ends of the bearing seat along the axial direction. The first and second bearing grooves are penetrated by the central shaft hole 64. The first bearing 62 is disposed in the first bearing groove and sleeved on the central rotating shaft 20, the second bearing 63 is disposed in the second bearing groove and sleeved on the central rotating shaft 20, the aperture of the central shaft hole 64 is matched with that of the central rotating shaft 20, and the central rotating shaft 20 can pass through the central shaft hole 64. In this way, the center shaft 20 is supported by the bearing post 60 of the double bearing, which can better improve the stability and concentricity of the motor and reduce noise in operation than using one bearing.

Further, as shown in fig. 3 and 5, a third bearing groove 13 is further provided in the housing 10, and a third bearing 14 is provided in the third bearing groove 13. The third bearing 14 is sleeved at one end of the central rotating shaft 20 away from the movable wind wheel 70. The stability and concentricity of the motor can be further improved by the third bearing 14.

As shown in fig. 3 and 5, the movable wind wheel 70 is fixedly disposed at one end of the central rotating shaft 20, and can rotate synchronously with the central rotating shaft 20. The rotor 70 includes a baffle portion 71, a first blade portion 72, and a spout portion 73. The baffle portion 71, the first blade portion 72, and the spout portion 73 may be integrally formed, or may be fixedly connected. In this embodiment, the baffle portion 71 and the first blade portion 72 are integrally formed, and the spout portion 73 is fixedly connected to the first blade portion 72.

Specifically, as shown in fig. 3 and 5, the baffle portion 71 is plate-shaped, is fixedly sleeved on the proximal end portion of the central rotating shaft 20, and is spaced apart from the air inlet 11. In this embodiment, as shown in fig. 8, the baffle portion 71 has a circular plate shape, the size of which is larger than that of the air inlet 11, and a through hole 1542 is provided at the center of the circle, and the baffle portion 71 can be sleeved on the central rotating shaft 20 through the through hole 1542.

As shown in fig. 3, 5 and 8, the first vane part 72 includes a plurality of first unit vanes 721 spirally distributed in the circumferential direction. The first unit blade 721 is perpendicular to the baffle portion 71 and is formed on a side surface of the baffle portion 71 facing the air intake port 11. The first unit blades 721 are spaced apart from each other to form a first passage 74. The number of the first unit blades 721 may be set as needed, and in this embodiment, 7 first unit blades 721 are provided in total. The distance between the first unit blades 721 may be set as required, in this embodiment, they are uniformly spaced, and the distance between the ends of the first unit blades 721 near the center is smaller than the distance between the ends thereof far from the center. When the rotor 70 rotates at a high speed under the drive of the central shaft 20, the first blade 72 may rotate to generate suction force.

As shown in fig. 3 and 5, the spout 73 is fixedly connected to an end of the first blade 72 opposite to the baffle portion 71, and is spaced apart from the baffle portion 71. The spout portion 73 is provided with a spout hole 731 having a spout shape. The spout aperture 731 is opposite the air inlet 11 and may extend through the air inlet 11 and the first passage 74. The air flow from the air inlet 11 may enter the first passage 74 through the spout aperture 731. The end of the spout hole 731 facing the air inlet 11 has a size larger than that of the air inlet 11.

As shown in fig. 3 and 5, the movable wind wheel 70 is fixedly sleeved on the central rotating shaft 20, and laterally spaced from the inner wall of the housing 10, so as not to affect the high-speed rotation of the movable wind wheel 70.

As shown in fig. 1 to 5, in order to smoothly release the component generated by the impeller, a static wind wheel 80 is fixedly connected in the housing 10.

As shown in fig. 1 to 3, 5 and 7, the static wind wheel 80 includes a cylindrical wall 81, a ring gear 82, a second blade 83 and a connecting portion 84. The cylinder wall 81, the ring gear 82, the second blade 83 and the connecting portion 84 may be integrally formed or may be fixedly connected. In this embodiment, the cylindrical wall 81, the annular stop 82, the second vane 83 and the connecting portion 84 are integrally formed.

As shown in fig. 3 and 7, the cylindrical wall 81 has a cylindrical shape with two open ends, and the circumferential outer wall thereof is bonded to the circumferential inner wall of the housing 10.

As shown in fig. 3 and 7, the annular stop 82 is formed in a surrounding shape, and is located in the cylindrical wall 81 and spaced apart from the cylindrical wall 81. The annular stopper 82 is provided coaxially with the cylindrical wall 81. The shape of the ring gear 82 may be set as required, and in this embodiment, it is formed by sequentially connecting a plurality of arc plates 821 in the circumferential direction, which is similar to a flower shape. Further, a gap 822 is formed between the arc plates 821 at a portion where the arc plates 821 are connected.

As shown in fig. 3 and 7, the second vane part 83 includes a plurality of rotary vanes 831. The rotary vane 831 is connected between the cylinder wall 81 and the annular stop 82 at intervals. A second passage 832 is formed between the rotary blades 831. The second passage 832 communicates with the first passage 74. In this embodiment, the number of the rotating blades 831 is identical to the number of the arc plates 821 of the annular stop 82, and one end of the rotating blade 831 is fixedly connected to the cylindrical wall 81 while being inclined with respect to the axial direction, and the other end of the rotating blade 831 is connected to the portion where the arc plates 821 are connected. The rotary blades 831 are inclined as a whole, which is advantageous for guiding out the component sucked by the rotor 70 toward the air outlet 12.

As shown in fig. 3 and 7, the connecting portion 84 is connected to the inner side of the ring gear 82, and has a flat plate shape, and a plurality of fixing holes 841 and connecting holes 842 are formed in the flat plate shape. The fixing hole 841 is fixedly connected with the first housing 15 through the connecting post 100. The connecting hole 842 is arranged coaxially with the cylinder wall 81 and is used for coaxial arrangement with the first housing 15.

As shown in fig. 3 and 7, further, a protruding overlap edge 85 is provided on the circumferential outer wall of the cylindrical wall 81. The overlapping edge 85 is annular, and divides the circumferential outer wall of the cylinder wall 81 into an upper part and a lower part, so that the overlapping edge can be respectively matched with the first casing 15 and the second casing 16 of the casing 10.

As shown in fig. 1 to 5, the housing 10 includes a first housing 15 and a second housing 16.

As shown in fig. 3 and 5, the second housing 16 is cylindrical, and has an open end for docking with the first housing 15. The other end of the second housing 16 is provided with an air inlet 11. In this embodiment, the second housing 16 is cylindrical, and the air inlet 11 is a circular hole. The end of the second housing 16 opposite to the air inlet 11 is provided with a second stepped portion 161. The second stepped portion 161 may be engaged with the overlap edge portion 85 and the cylindrical wall portion 81 of the static wind wheel 80.

As shown in fig. 3 and 5, the first housing 15 is cylindrical, and has an open end for docking with the second housing 16. The other end of the first housing 15 is used to form the air outlet 12. In this embodiment, the first housing 15 is cylindrical, and a first step 151 is provided at an end of the first housing 15 facing the second housing 16. The first step 151 may be engaged with the overlap edge 85 and the cylindrical wall 81 of the static wind wheel 80.

The static wind wheel 80 is fixedly connected between the first casing 15 and the second casing 16, specifically, the lap joint edge portion 85 of the static wind wheel 80 is clamped between the first casing 15 and the second casing 16, and the cylindrical wall portion 81 of the static wind wheel 80 is respectively matched with the first step portion 151 and the second step portion 161, so that the inner wall of the cylindrical wall portion 81 is flush with the inner walls of the first casing 15 and the second casing 16, and the inner walls of the casings 10 are smoothly connected, which is beneficial to air volume circulation.

Further, as shown in fig. 3, 5 and 6, the first housing 15 includes a first cylinder 152, a second cylinder 153, a third cylinder 154, a first grid 155 and a second grid 156, which are integrally formed.

As shown in fig. 3, 5 and 6, the first cylindrical portion 152 has a cylindrical shape with two open ends, and the end portion facing the second housing 16 is provided with the first step portion 151.

As shown in fig. 3, 5 and 6, the second cylinder 153 has a cylindrical shape with two open ends, is positioned in the first cylinder 152, and is coaxial with and spaced apart from the first cylinder 152.

As shown in fig. 3, 5 and 6, the third cylinder 154 has a cylindrical shape with two open ends, and is disposed in the second cylinder 153 and is coaxial with and spaced apart from the second cylinder 153. The third cylinder 154 is provided with a fourth bearing groove 1541 and a through hole 1542 provided in the axial direction.

As shown in fig. 3, 5 and 6, the first grid 155 is connected between the first tube 152 and the second tube 153. The first grating portion 155 is provided with a plurality of first grating holes 1551, and the first grating holes 1551 penetrate the air outlet 12 and the second channels 832.

As shown in fig. 3, 5 and 6, the second grid portion 156 is connected between the second tube portion 153 and the third tube portion 154. The second grid part 156 is provided with a plurality of second grid holes 1561.

As shown in fig. 3, 5 and 6, when the static wind wheel 80 is fixed between the first housing 15 and the second housing 16, the connection portion 84 of the static wind wheel 80 is sleeved on the third barrel portion 154 of the first housing 15 through the connection hole 842 thereof, so as to ensure concentricity of the structure.

Further, as shown in fig. 3, in order to fix the static wind wheel 80 to the housing 10 more firmly, a plurality of connection posts 100 are installed between the second grid portions 156. The connection post 100 is mounted in the second grid hole 1561 and forms a shape-fit with the second grid part 156 such that the connection post 100 is restrained to move only in the axial direction within the second grid part 156. The connecting column 100 is provided with an installation hole 101 penetrating in the axial direction, and the connecting column 100 can be fixed to the fixing hole 841 of the static wind wheel 80 by a screw. In this way, the static wind wheel 80 and the first housing 15 are fixedly connected together by the connecting column 100 and the screw.

As shown in fig. 1 to 5, in order to fixedly mount the core stator 40, a plurality of first fixing posts 157 extending in the axial direction are provided at one end of the second cylinder 153 away from the second housing 16. The first fixing columns 157 are spaced apart from each other, and are provided with screw holes extending in an axial direction for fixing by screws.

As shown in fig. 1 to 5, to fixedly mount the end cap 17, a plurality of second fixing posts 158 extending in the axial direction are provided at an end of the first cylindrical portion 152 remote from the second housing 16. The second fixing posts 158 are spaced apart from each other and have threaded holes extending in an axial direction for fixing by screws.

As shown in fig. 3, the core stator 40 is fixed in the housing 10 by an insulating sleeve 110. Specifically, the insulating sleeve 110 includes a first insulating sleeve 111 and a second insulating sleeve 112 that can be aligned. The first insulating sleeve 111 is provided with a connecting lug 113 corresponding to the first fixing column 157, and the connecting lug 113 is provided with a threaded hole or a through hole, which can be fixed on the first fixing column 157 by a screw, so that the first insulating sleeve 111 is fixed in the first housing 15.

As shown in fig. 3, 5 and 9, the iron core stator 40 is formed by stacking silicon steel sheets, and includes a cylindrical main body 41 and magnetic shoe parts 42 spaced apart from the inner surface of the main body 41. The magnetic shoe parts 42 are uniformly spaced on the inner wall of the main body part 41. In this embodiment, 3 magnetic shoes 42 are provided. In other embodiments, other numbers of magnetic shoes 42 may be provided. The free ends of the magnetic shoes 42 are spaced apart from each other and form a circumferential shape which defines a cylindrical first cavity 43. The magnetic shoes 42 are spaced apart from each other to form a second cavity 44. The second cavity 44 is communicated with the first cavity 43.

As shown in fig. 5, the first insulating sleeve 111 and the second insulating sleeve 112 each include an annular end portion 114, and flat plate portions 115 extending inward are provided on the inner wall of the end portion 114, and the shape and distribution of the flat plate portions 115 are consistent with the planar shape and distribution of the magnetic shoe portion 42. A flange 116 extending in the axial direction is provided at an end of the flat plate 115. The ledge 116 may be used to prevent the coil 50 from loosening and falling out. A spacer 117 protruding in the axial direction is provided on a surface of the end head 114 facing away from the protruding edge 116, and the spacer 117 conforms to the shape of the second cavity 44 and is sleeved in the second cavity 44 to isolate the coil 50 from the core stator 40.

As shown in fig. 3, the first insulating sleeve 111 and the second insulating sleeve 112 may be respectively sleeved on the core stator 40 from two ends of the core stator 40, so that the end heads 114 are respectively located at two ends of the core stator 40, and the spacer 117 is located in the second cavity 44 between the magnetic shoe parts 42, thereby effectively isolating the core stator 40 and the coil 50.

As shown in fig. 3 and 5, the connecting lugs 113 are provided on the end portions 114 of the first insulating bush 111, and when the first insulating bush 111 is fixed to the first fixing posts 157, the core stator 40 is fitted between the first insulating bush 111 and the second insulating bush 112 so as not to be loosened.

The coil 50 is sleeved on the magnetic shoe 42 of the iron core stator 40, and is isolated from the magnetic shoe 42 by the spacer 117 and the end 114 of the insulating sleeve 110. The protruding edge 116 of the insulating sleeve 110 can limit the coil 50, and prevent the coil 50 from loosening or falling off.

Further, as shown in fig. 2, 3 and 5, the housing 10 further includes an end cap 17. The end cap 17 is connected to an end of the first housing 15 opposite the second housing 16. The end cap 17 is a non-sealing cap, is abutted against the end of the first housing 15, and is connected to the second fixing post 158 by a screw to be fixedly connected to the first housing 15. The air outlet 12 is formed between the end cover 17 and the first housing 15.

In this embodiment, the third bearing groove 13 is provided in the end cover 17. One end of the central rotating shaft 20 is inserted into the third bearing 14, and the other end passes through the first cavity 43 of the iron core stator 40, the first bearing 62 of the bearing post 60, and the second bearing 63 to be fixedly connected with the movable wind wheel 70.

The magnetic ring 30 is a well-known magnetic ring, and is fixedly sleeved on the central rotating shaft 20, and is located in the first cavity 43 of the iron core stator 40 and spaced from the iron core stator 40.

As shown in fig. 3 and 5, the end of the central rotating shaft 20 is fixedly connected with the movable wind wheel 70 through a first cushion block 120, a second cushion block 130 and a nut 140.

As shown in fig. 3 and 5, the first cushion block 120 and the second cushion block 130 are respectively and fixedly sleeved on the proximal end portion of the central rotating shaft 20, and are distributed on two sides of the baffle portion 71 of the movable wind wheel 70. The first cushion block 120 is located at a side of the baffle plate 71 away from the air outlet 12, and the second cushion block 130 is located at a side of the baffle plate 71 facing the air outlet 12. The shutter portion 71 is clamped between the first and second spacers 120 and 130 so as to be fixedly coupled with the central rotation shaft 20.

As shown in fig. 3 and 5, the nut 140 is screwed to the end of the central shaft 20 and abuts against the second pad 130, which further prevents axial loosening.

Further, as shown in fig. 3 and 5, the first pad 120 is provided with a boss portion 121 integrally formed therewith, and the boss portion 121 is sleeved on the central rotating shaft 20 and inserted into the central through hole 1542 of the first housing 15.

Thus, the high-speed brushless motor for dust collection of the present utility model is formed, and the overall assembly relationship thereof is briefly described as follows:

an end cap 17 is connected to one end of the first housing 15, and a second housing 16 is connected to the other end of the first housing 15. An air outlet 12 is formed between the end cover 17 and the first shell 15, and an air inlet 11 is formed at the end of the second shell 16.

One end of the central rotating shaft 20 is in rotary connection with the end cover 17 through the third bearing 14, and the non-end part of the central rotating shaft 20 is in rotary connection with the third barrel part 154 of the first shell 15 through the bearing post 60; the other end of the central shaft 20 is opposite to the air outlet 12.

The magnetic ring 30 is sleeved on the central rotating shaft 20 and is positioned in the first cavity 43 of the iron core stator 40.

The core stator 40 is fixed in the housing 10 by the first insulating sleeve 111 and the second insulating sleeve 112, and encloses the magnet ring 30 therein. The first insulating sleeve 111 and the second insulating sleeve 112 may be sleeved on the core stator 40 from both ends of the core stator 40 and partially wrap the magnetic shoe 42 of the core stator 40, so that the coil 50 sleeved on the magnetic shoe 42 cannot directly contact with the magnetic shoe 42.

The first insulating bush 111 is fixed to the first fixing column 157 by the connection lugs 113 thereof, and thus is fixed in the first housing 15.

The coil 50 is fitted over the magnetic shoe 42 of the core stator 40, and is spaced from the magnetic shoe 42 by the end 114 of the insulating sleeve 110 and the spacer 117. And one side of the coil 50 facing the central rotation shaft 20 is limited by the convex edge 116, so that the coil 50 can be prevented from loosening and falling off.

The static wind wheel 80 is fixed between the first housing 15 and the second housing 16: the overlap edge portion 85 of the static wind wheel 80 is clamped between the first housing 15 and the second housing 16, and the cylindrical wall portion 81 of the static wind wheel 80 is matched with the first step portion 151 and the second step portion 161; the connection portion 84 of the static wind wheel 80 is sleeved on the third cylinder portion 154 of the first housing 15 through the connection hole 842 thereof, so that concentricity is ensured. The connection portion 84 of the static wind wheel 80 is fixedly connected with the first housing 15 through the connection post 100, wherein the connection post 100 is installed between the second grid portions 156 and is fixedly connected with the fixing hole 841 on the connection portion 84 through a screw, so that the static wind wheel 80 is fixedly connected with the first housing 15.

The movable wind wheel 70 is disposed in the housing 10 and located at the air outlet 12. The rotor 70 is fixed to the end of the central rotating shaft 20: the baffle plate portion 71 of the rotor 70 is sleeved on the end portion of the central rotating shaft 20, the first cushion block 120 and the second cushion block 130 are respectively sleeved on the central rotating shaft 20 and clamped on two sides of the baffle plate portion 71, and the nut 140 is in threaded connection with the central rotating shaft 20 and abuts against the second cushion block 130, so that the baffle plate portion 71 can be fixed on the central rotating shaft 20.

The movable wind wheel 70 is provided with a kettle opening 731 and a first channel 74, the static wind wheel 80 is provided with a second channel 832, and the first housing 15 is provided with a first grid hole 1551.

When the coil 50 is energized, a magnetic pole is generated in the housing 10 to rotate the magnetic ring 30, thereby rotating the central rotating shaft 20 at a high speed.

When the central rotating shaft 20 rotates at a high speed, the moving wind wheel 70 rotates at a high speed, and negative pressure is generated at the air inlet 11 to form vacuum, so that suction force is formed. The air volume passes through the air inlet 11, the kettle mouth hole 731, the first channel 74, the second channel 832, and the second grid hole 1561 in sequence, and then goes out from the air outlet 12.

The high-speed brushless motor for dust collection has the characteristics of stable structure, high running speed, long service life, safety and reliability, and can also increase the stability and concentricity of the motor and reduce noise in running because the bearing post 60 is arranged on the central rotating shaft 20.

Although the present utility model has been disclosed by the above embodiments, the scope of the present utility model is not limited thereto, and each of the above components may be replaced with similar or equivalent elements known to those skilled in the art without departing from the spirit of the present utility model.

Claims (10)

1. A high-speed brushless motor for dust collection, comprising:

a shell (10) provided with an air inlet (11) and an air outlet (12);

a central rotating shaft (20) rotatably arranged in the housing (10);

the magnetic ring (30) is fixedly sleeved on the central rotating shaft (20);

the iron core stator (40) is fixedly arranged in the shell (10) and surrounds the outside of the magnetic ring (30);

the coil (50) is sleeved on the iron core stator (40);

the bearing column (60) is arranged in the shell (10) and sleeved on the central rotating shaft (20) to form rotating connection with the central rotating shaft (20);

the movable wind wheel (70) is arranged in the shell (10) and is positioned at the air inlet (11), and the movable wind wheel (70) is fixedly connected with the end part of the central rotating shaft (20).

2. The high-speed brushless motor for dust collection according to claim 1, wherein the bearing post (60) is disposed at a non-end portion of the central rotating shaft (20), the bearing post (60) comprises a bearing seat (61), a first bearing (62) and a second bearing (63), the bearing seat (61) is cylindrical, a first bearing groove and a second bearing groove are respectively disposed at two ends of the bearing seat along an axial direction, the first bearing groove and the second bearing groove are communicated through a central shaft hole (64), the first bearing (62) is disposed in the first bearing groove, the second bearing (63) is disposed in the second bearing groove, and the aperture of the central shaft hole (64) is matched with that of the central rotating shaft (20).

3. A high-speed brushless motor for dust collection according to claim 1, wherein a third bearing groove (13) is provided in the housing (10), a third bearing (14) is provided in the third bearing groove (13), and the third bearing (14) is sleeved at one end of the central rotating shaft (20) away from the movable wind wheel (70).

4. A high-speed brushless motor for dust collection according to claim 1, wherein the movable wind wheel (70) comprises:

a baffle plate part (71) fixedly sleeved on the central rotating shaft (20) and opposite to the air inlet (11) in position interval;

the first vane part (72) comprises a plurality of first unit vanes (721) which are distributed in a vortex manner along the circumferential direction, the first unit vanes (721) are vertically arranged on one side surface of the baffle part (71) facing the air inlet (11), and the first unit vanes (721) are spaced to form a first channel (74);

a spout portion (73) connected to an end of the first blade portion (72) opposite to the baffle portion (71), and provided with a spout hole (731) having a spout shape, wherein the spout hole (731) penetrates the first passage (74) and the air inlet (11).

5. A high-speed brushless motor for dust collection according to claim 4, wherein a static wind wheel (80) is fixedly connected in the housing (10), and the static wind wheel (80) comprises:

a cylindrical wall (81) which is formed in a cylindrical shape with both ends open and is fitted to the inner wall of the housing (10);

the annular baffle part (82) is in a surrounding shape, is positioned in the cylinder wall part (81) and is spaced from the cylinder wall part (81);

the second blade part (83) comprises a plurality of rotary blades (831), the rotary blades (831) are connected between the cylinder wall part (81) and the annular baffle part at intervals, a second channel (832) is formed between the rotary blades (831), and the second channel (832) is communicated with the first channel (74).

6. A high-speed brushless motor for dust collection according to claim 5, wherein the housing (10) comprises a first housing (15) and a second housing (16), the air outlet (12) is provided at one end of the first housing (15), and the air inlet (11) is provided at one end of the second housing (16);

the cylinder wall part (81) is provided with a lap joint edge part (85) on the circumferential outer wall, the lap joint edge part (85) is clamped between the first shell (15) and the second shell (16), and two ends of the cylinder wall part (81) are respectively matched with the inner walls of the first shell (15) and the second shell (16).

7. A high-speed brushless motor for dust collection according to claim 6, wherein said first housing (15) comprises integrally formed:

a first cylindrical portion (152) having a cylindrical shape with both ends open;

a second cylindrical portion (153) having a cylindrical shape with both ends open, and disposed in the first cylindrical portion (152) and coaxial with and spaced apart from the first cylindrical portion (152);

a third tube portion (154) having a cylindrical shape with both ends open, and being positioned in the second tube portion (153) and being coaxial with and spaced apart from the second tube portion (153); a fourth bearing groove (1541) and a through hole (1542) which are arranged along the axial direction are arranged on the third cylinder part (154), and the through hole (1542) penetrates through the fourth bearing groove (1541);

a first grid part (155) provided with first grid holes (1551), wherein the first grid holes (1551) penetrate through the air outlet (12) and the second channel (832); the first grid part (155) is connected between the first cylinder part (152) and the second cylinder part (153);

and a second grid section (156) connected between the second tube section (153) and the third tube section (154).

8. A high-speed brushless motor for dust collection according to claim 7, wherein,

the static wind wheel (80) comprises a connecting part (84), wherein the connecting part is connected to the inner side of the ring gear part (82), and a plurality of fixing holes (841) fixedly connected with the first shell (15) and connecting holes (842) coaxially arranged with the cylinder wall part (81) are formed in the connecting part;

the connecting hole (842) of the static wind wheel (80) is coaxially sleeved on the third cylinder part (154) of the first shell (15);

a plurality of connecting columns (100) are arranged between the second grid parts (156) of the first shell (15), and the connecting columns (100) are fixed at the fixing holes (841) of the static wind wheel (80) through screws;

the bearing post (60) is arranged in a fourth bearing groove (1541) of the first shell (15);

the end part of the central rotating shaft (20) passes through a central through hole (1542) of the first shell (15) and is fixedly connected with the movable wind wheel (70).

9. A high-speed brushless motor for dust collection according to claim 8, wherein,

a plurality of first fixing columns (157) extending along the axial direction are arranged at one end of the second cylinder part (153) far away from the second shell (16),

a plurality of second fixing columns (158) extending along the axial direction are arranged at one end of the first barrel part (152) far away from the second shell (16);

an insulating sleeve (110) is sleeved outside the iron core stator (40), and the insulating sleeve (110) is fixed on the first fixing column (157) through a screw;

the shell (10) further comprises an end cover (17), the end cover (17) is fixed on the second fixing column (158), and the air outlet (12) is formed between the end cover (17) and the first shell (15).

10. A high-speed brushless motor for dust collection according to claim 9, wherein,

a first cushion block (120) and a second cushion block (130) are respectively arranged at two sides of a baffle plate part (71) of the movable wind wheel (70),

the first cushion block (120) is sleeved on the central rotating shaft (20), one end of the first cushion block (120) is inserted into a through hole (1542) of the first shell (15), and the other end of the first cushion block is abutted against the baffle plate part (71);

the second cushion block (130) is sleeved on the central rotating shaft (20) and is abutted against the baffle plate part (71);

a nut (140) is connected to the end of the central rotating shaft (20) in a threaded mode, and the nut (140) is abutted to the second cushion block (130).

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