CN115085413A - Motor and blowing equipment - Google Patents

Abstract

The invention discloses a motor and a blowing device, wherein the motor comprises: a rear housing; a drive shaft coaxially disposed in the rear housing; a rotor connected to the driving shaft; the stator component is arranged outside the rotor and is provided with a wind guide channel, and the wind guide channel extends along the direction parallel to the axial direction of the motor and penetrates through the front end and the rear end of the stator component; the front shell is connected to the outside of the stator assembly, at least part of the front shell is fixed in the rear shell, and the front end of the front shell is provided with a hollow structure communicated with the air guide channel; and a fan connected to the driving shaft and located at a rear side of the stator assembly. According to the motor provided by the invention, the wind guide channel with the combined structure is arranged on the stator component, and negative pressure wind suction is realized in a fan rear-mounted mode, so that the energy loss of the wind guide channel is reduced to the maximum extent, and the viscous effect of gas in a gap between the stator and the rotor on the rotation of the rotor is reduced in a negative pressure mode.

Description

Motor and blowing equipment

Technical Field

The invention relates to the field of motors, in particular to a motor and blowing equipment.

Background

In the motor for the existing blower, the air guide channel structure is complicated and tortuous, so that energy loss is achieved, and the air speed and the air quantity are influenced; the fan is arranged at the front end, and wind is blown into the motor in a positive pressure mode.

Disclosure of Invention

The technical problem to be solved by the embodiments of the present invention is to provide a motor and a blower, in which a wind guide channel is provided in a stator assembly, and a fan is provided at the rear side of the stator assembly, so as to reduce the adhesion to a rotor by means of negative pressure wind suction.

In order to solve the above technical problem, the present invention provides a motor including:

a rear housing;

a drive shaft coaxially disposed in the rear housing;

a rotor connected to the drive shaft;

the stator assembly is arranged outside the rotor and provided with a wind guide channel, and the wind guide channel extends along the direction parallel to the axial direction of the motor and penetrates through the front end and the rear end of the stator assembly;

the front shell is connected to the outside of the stator assembly, at least part of the front shell is fixed in the rear shell, and the front end of the front shell is provided with a hollow structure communicated with the air guide channel;

a fan connected to the drive shaft and located at a rear side of the stator assembly.

Optionally, in the motor provided by the present invention, the rear housing is provided with an air outlet of the motor, and the air outlet of the motor is located at the rear side of the fan.

Optionally, the present invention provides a motor, wherein a flow direction of air at an air outlet of the motor is parallel to a flow direction of air in the motor.

Optionally, in the motor provided by the present invention, the air inlet of the motor is disposed at a position corresponding to the hollow structure of the front housing.

Optionally, the present invention provides an electric machine, wherein the stator assembly includes:

the iron core outer ring is of a cylindrical hollow structure, and an air guide hole extending along the direction parallel to the axial direction of the motor is formed in the inner wall of the iron core outer ring;

and the at least two stator modules are connected in the outer ring of the iron core, and the air guide holes are positioned between the stator modules.

Optionally, in the motor provided by the present invention, an arc-shaped protrusion is formed on an inner wall of the iron core outer ring along a radial direction, and the air guide hole is formed in the arc-shaped protrusion.

Optionally, in the motor provided by the invention, the number of the air guide holes is several, and all the air guide holes are symmetrically arranged or uniformly distributed in the circumferential direction.

Alternatively, the present invention provides the motor, wherein the front casing has a wind guide groove arranged along a longitudinal direction;

the air guide groove is arranged on the outer side of the front shell to form an air guide channel with the rear shell; or the wind guide groove is arranged on the inner side of the front shell to form a wind guide channel with the stator assembly.

Optionally, in the motor provided by the present invention, an air guiding blade is further disposed in the rear housing behind the fan, the periphery of the air guiding blade is connected to the inner wall of the rear housing, a first concave accommodating structure is formed in the center of the fan, and the end of the driving shaft is connected to the first accommodating structure.

Optionally, the motor provided by the present invention further includes an insulating outer sleeve, the insulating outer sleeve and the rear housing are butted to form a cylindrical accommodating space, the front end of the front housing is located in the insulating outer sleeve, and the rear end of the front housing is located in the rear housing; the air inlet position of the motor is located on the front end face of the insulating outer sleeve and the front end face of the front shell.

Optionally, in the motor provided by the present invention, the front end of the insulating casing is provided with a hollow structure, and the hollow structure corresponds to the hollow structure at the front end of the front casing.

Optionally, in the motor provided by the present invention, a first bearing is disposed on the driving shaft at the front end of the rotor, a second bearing is disposed on the driving shaft at the rear end of the rotor, and the rear end of the second bearing abuts against a pre-pressing spring;

the second bearing and the pre-pressing spring are arranged in the first accommodating structure, and a clearance fit is adopted between the second bearing and the inner wall of the first accommodating structure.

Optionally, in the motor provided by the present invention, one end of the pre-pressure spring abuts against the bottom of the first accommodating structure, the other end of the pre-pressure spring abuts against or is connected to the second bearing, and an air hole is formed in the bottom of the first accommodating structure to balance air pressures inside and outside the first accommodating structure.

Optionally, in the motor provided by the present invention, a concave hole capable of being sleeved outside the first accommodating structure is disposed in the center of the fan, and a gap is reserved between the concave hole and the outer wall of the first accommodating structure.

Optionally, in the motor provided by the present invention, a convex second receiving structure is provided at a front center of the insulating outer casing, and a bearing seat is formed at a front center of the front casing, the bearing seat being located in the second receiving structure, and the bearing seat being configured to receive the first bearing.

Optionally, in the motor provided by the present invention, the front end surface of the insulating outer sleeve is a first hollow structure, and the first hollow structure specifically includes: the second accommodating structure is connected with the side wall of the insulating outer sleeve through a support rod; the preceding terminal surface of anterior casing is second hollow out construction, second hollow out construction is: the bearing seat is connected with the side wall of the front shell through a connecting rod; and the positions of the support rods and the connecting rods in the circumferential direction correspond to each other one to one.

Optionally, the motor provided by the invention further comprises a bearing bracket, and the bearing bracket is connected with the bearing seat in a matching manner to form an accommodating space for accommodating the first bearing.

Alternatively, the present invention provides the motor wherein the bearing bracket is made of an insulating material.

Optionally, in the motor provided by the present invention, the support rod has a groove structure, and the connecting rod is installed in the groove; correspondingly, the bearing bracket is provided with an extending part corresponding to the connecting rod, the extending part and the supporting rod are positioned at two sides of the connecting rod, and the extending part and the groove structure are in butt joint to form a space for accommodating the connecting rod.

Optionally, the present invention provides the motor, wherein the second accommodating structure is a cylindrical cavity; a terminal board is arranged on the outer side of the second accommodating structure and is also circular; the connection guide post of each stator module is connected to the terminal plate, respectively.

Optionally, the motor provided by the present invention further includes:

and the control box is connected to the terminal board and is conducted with the connecting guide columns of the iron core modules through the lines on the terminal board.

Optionally, in the motor provided by the present invention, the stator module includes:

the iron core block is connected to the inner wall of the iron core outer ring along the longitudinal direction;

the coil support is connected inside the iron core outer ring and is integrally injection-molded with the iron core block;

a stator coil wound on the coil support;

and the insulating support is positioned in the iron core outer ring and is abutted between two adjacent coil supports.

Alternatively, the present invention provides the motor in which a ventilation aperture extending in a direction parallel to an axial direction of the motor is formed between the insulating support and the stator coil.

Optionally, in the motor provided by the present invention, two connecting guide pillars are disposed on two sides of the coil support, and the two connecting guide pillars are correspondingly connected to two ends of the stator coil.

Optionally, in the motor provided by the invention, the iron core block is in an inverted T shape; the number of the iron core blocks is three, the iron core blocks are distributed around the rotor in a regular triangle shape, and a through hole is formed in the middle to be assembled with the rotor.

Optionally, in the motor provided by the present invention, a dovetail groove arranged longitudinally is provided on an inner wall of the core outer ring corresponding to the connecting portion of the core block, and the core block is mounted in the dovetail groove.

Optionally, in the motor provided by the present invention, a longitudinal protrusion is disposed in a middle portion of the insulating support, and the longitudinal protrusion separates two adjacent iron core blocks.

The invention also provides a blowing device which uses the motor.

The implementation of the invention has the following beneficial effects:

according to the motor provided by the invention, the wind guide channel with the combined structure is arranged on the stator component, and negative pressure wind suction is realized in a fan rear-mounted mode, so that the energy loss of the wind guide channel is reduced to the maximum extent, and the viscous effect of gas in a gap between the stator and the rotor on the rotation of the rotor is reduced in a negative pressure mode.

The blowing equipment provided by the invention can improve the air volume and reduce the wind noise.

Drawings

Fig. 1 is a sectional view of an overall structure of a motor provided in an embodiment of the present invention;

fig. 2 is a schematic view of an assembled structure of a motor provided by an embodiment of the present invention (with the insulating outer casing and the rear housing removed);

fig. 3 is a schematic view of an assembly structure of a motor according to an embodiment of the present invention;

fig. 4 is a schematic view of an internal structure of a motor according to an embodiment of the present invention;

fig. 5 is a schematic view of an internal structure of a motor according to an embodiment of the present invention;

fig. 6 is a schematic view showing the assembly of the core block and the coil support.

Reference numerals in the drawings:

10. a drive shaft; 11. a rotor; 12. a fan; 13. a first bearing; 14. a second bearing; 15. pre-pressing a spring; 121. concave holes;

21. a rear housing; 22. an insulating outer sleeve; 23. a first containment structure; 24. wind guide blades; 25. a second containment structure; 26. a support bar;

30. a front housing; 31. a bearing seat; 32. a connecting rod; 33. a wind guide groove;

40. an iron core outer ring; 41. a core block; 42. a coil support; 43. a stator coil; 44. an insulating support; 45. a wind guide hole; 46. an extension portion; 47. an arc-shaped bulge; 48. a guide post; 49. a vent aperture;

51. a terminal plate; 52. and a control box.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for purposes of illustration only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1-5, the present embodiment provides a motor comprising a rear housing 21, a drive shaft 10, a rotor 11, a stator assembly, and a front housing 30 wherein: the rear housing 21 is used for providing a fan accommodating space and accommodating the fan 12 therein, the rear housing 21 is connected with the front housing 30, so that the rear housing 21 and the front housing 30 can be fixed with each other to form an accommodating space, wherein the front housing 30 is used for fixing a stator assembly, and the accommodating space formed by the stator assembly and the rear housing 21 can ensure that the rotor 11 and the fan 12 rotate therein; the drive shaft 10 is coaxially arranged in the rear housing 21, the drive shaft 10 penetrating the front and rear housings of the entire motor; the rotor 11 is sleeved on the driving shaft 10; the stator assembly is arranged outside the rotor 11 and is provided with a wind guide channel, and the wind guide channel extends along the direction parallel to the axial direction of the motor and penetrates through the front end and the rear end of the stator assembly; the front shell 30 is connected to the outside of the stator assembly, at least part of the front shell 30 is fixed in the rear shell 21, the front end of the front shell is provided with a hollow structure communicated with the air guide channel, and air directly enters the air guide channel through the hollow structure and then is discharged through the air outlet through the fan; the fan 12 is connected to the driving shaft 10 and located at the rear side of the stator assembly to be rotated by the driving shaft 10, thereby providing a negative pressure suction effect.

According to the motor provided by the embodiment, the wind guide channel with the combined structure is arranged on the stator assembly, and negative pressure air suction is realized in a fan rear-mounted mode, so that the energy loss of the wind guide channel is reduced to the maximum extent, and the viscous effect of gas in a gap between the stator and the rotor on the rotation of the rotor is reduced in a negative pressure mode.

Alternatively, in the motor provided by the present invention, the rear housing 21 is provided with an air outlet 27 of the motor, the air outlet 27 of the motor is located at the rear side of the fan 12, and the air guiding blade 24 is usually disposed in the air outlet 27, and the air flow is guided by the air guiding blade 24.

Alternatively, the present invention provides a motor in which the flow direction of the air at the air outlet 27 of the motor is parallel to the flow direction of the air in the motor. At this time, the hollow structure of the front housing 30, the wind guide channel of the stator assembly and the wind outlet are located in the same direction parallel to the axial direction of the motor to form a linear airflow channel, thereby reducing the energy loss in the air flowing process to the maximum extent. The air inlet of the motor is arranged at the corresponding position of the hollow structure of the front shell 30, so that the energy loss in the air flowing process is further reduced.

Optionally, the present invention provides an electric machine, wherein the stator assembly comprises a core outer ring 40 and a stator module, wherein: the iron core outer ring 40 is of a cylindrical hollow structure, so that an installation space is provided for the stator module, and an air guide hole extending along the direction parallel to the axial direction of the motor is formed in the inner wall of the iron core outer ring 40; the stator modules are connected in the core outer ring 40, the stator modules can be 3 groups and are arranged on the inner circumference of the core outer ring 40 in an evenly distributed mode, and the stator modules are used for providing a stator coil 43, an insulating support, a core block and a coil support.

Optionally, in the motor provided by the present invention, an arc protrusion 47 is radially formed on an inner wall of the core outer ring 40, the air guiding hole 45 is opened in the arc protrusion 47, and the shape of the arc protrusion 47 is adapted to the shape of the insulating support 44, so that the insulating support 44 can be attached to the arc protrusion 47 and supported by the arc protrusion 47. The arc-shaped protrusion 47 can improve the supporting strength of the whole iron core outer ring 40, and the air guide holes 45 are arranged to ensure the area of the air guide channel to the maximum extent.

Optionally, in the motor provided by the present invention, the number of the air guiding holes 45 is several, and all the air guiding holes 45 are symmetrically arranged or uniformly distributed in the circumferential direction. The air guiding holes 45 may be optionally determined according to the number of the stator modules, and one air guiding hole 45 is disposed between two adjacent coil brackets 42.

Alternatively, the present invention provides a motor in which the front case 30 has the air guide grooves 33 arranged along the longitudinal direction; the air guide grooves 33 may be arranged along the outside or inside of the front case 30, specifically:

the air guide groove 33 is arranged outside the front casing 30 to form an air guide passage with the rear casing 21; alternatively, the air guide groove 33 is provided inside the front case 30 to form an air guide passage with the stator assembly.

The air guide channel formed by the air guide groove 33 structure can guide air under the action of the fan 12, and the cross section of the air guide channel is further enlarged on the basis of the air guide hole 45, so that the air volume is enlarged.

Alternatively, in the motor provided by the present invention, an air guiding blade 24 is further provided in the rear housing 21 at the rear side of the fan 12, the periphery of the air guiding blade 24 is connected to the inner wall of the rear housing 21, the center of the fan 12 forms a concave first accommodating structure 23, the end of the driving shaft 10 is connected to the first accommodating structure 23, the first accommodating structure 23 itself forms a cylindrical structure and is located at the center of the rear housing 21, and the first accommodating structure 23 is fixed on the inner wall of the rear housing 21 from different directions through the air guiding blade 24.

Optionally, the motor provided by the present invention further includes an insulating outer casing 22, the insulating outer casing 22 and the rear casing 21 are butted to form a cylindrical accommodating space, the front end of the front casing 30 is located in the insulating outer casing 22, and the rear end is located in the rear casing 21; the air intake of the motor is located at the front end surface of the insulating outer sleeve 22 and the front end surface of the front shell 30. When air guide groove 33 of front case 30 is provided on the outside, an air guide passage is formed between air guide groove 33, insulating outer jacket 22, and rear case 21. The insulating casing 22 itself is also generally cylindrical in structure with a cylindrical inner wall, the outer dimension of the insulating casing 22 is generally the same as the outer dimension of the rear housing 21, and is also generally cylindrical in structure, the insulating casing 22 and the rear housing 21 are butted and sealed with each other, thereby providing an air guide passage to prevent air flow from leaking through the butted position between the two, and the outer diameter profile and the basic length of the whole motor are determined by the insulating casing 22 and the rear housing 21.

Optionally, in the motor provided by the present invention, the front end of the insulating outer casing 22 is also provided with a hollow structure, and the hollow structure corresponds to the hollow structure at the front end of the front housing 30, so that air enters the air guiding channel inside the motor from the hollow structures of the insulating outer casing 22 and the front housing 30. Optionally, in the motor provided by the present invention, the front end surface of the insulating outer sleeve 22 is a first hollow structure, and the first hollow structure specifically includes: the second receiving structure 25 is connected to the side wall of the insulating sheath 22 by means of a support bar 26; the preceding terminal surface of anterior casing 30 is second hollow out construction, and second hollow out construction is: the bearing housing 31 is connected to the side wall of the front housing 30 by a connecting rod 32; and the positions of the support rods and the connecting rods 32 in the circumferential direction correspond one to one.

Optionally, in the motor provided by the present invention, a first bearing 13 is disposed on the driving shaft 10 at the front end of the rotor 11, a second bearing 14 is disposed on the driving shaft 10 at the rear end of the rotor 11, and the rear end of the second bearing 14 abuts against the pre-pressing spring 15; the second bearing 14 and the pre-compression spring 15 are placed in the first receiving structure 23 with a clearance fit between the second bearing 14 and the inner wall of the first receiving structure 23. The prepressing spring is arranged on the driving shaft at one side, and the fan is arranged at the rear end to realize negative pressure air suction, so that the hysteresis effect of air flow when the rotor runs at high speed is reduced, and the rotor can stably run at a higher rotating speed through the prepressing effect of the prepressing spring; the acting force direction of the rotation of the fan on the driving shaft is the same as the pre-pressing direction of the pre-pressing spring on the driving shaft, so that the driving shaft is tightly assembled between the two bearings, the axial movement of the driving shaft caused by the speed change of the fan after the motor is assembled is avoided, the vibration is reduced, and the stability of the motor during high-speed rotation is improved.

Alternatively, the present invention provides a motor, wherein one end of the pre-pressure spring 15 abuts against the bottom of the first accommodating structure 23, the other end abuts against or is connected with the second bearing 14, and an air hole is formed at the bottom of the first accommodating structure 23 to balance the air pressure inside and outside the first accommodating structure 23. In the process of adjusting the position of the second bearing 14 by the pre-pressing spring 15, the second bearing 14 and the first accommodating structure 23 may slide relatively, and due to the adhesive-coated connection between the second bearing 14 and the first accommodating structure 23, the inside of the first accommodating structure 23 may not move or be fixed in a viscous manner due to negative pressure generated relative to the outside, so that the air holes are designed to balance the pressure difference inside and outside the first accommodating structure 23, thereby ensuring the balance of the internal and external pressures of the first accommodating structure 23, and enabling the second bearing 14 to move axially inside the first accommodating structure 23.

Optionally, in the motor provided by the present invention, the center of the fan 12 is provided with a concave hole 121 capable of being sleeved outside the first accommodating structure 23, a gap is reserved between the concave hole 121 and an outer wall of the first accommodating structure 23, and the concave hole 121 is sleeved outside the first accommodating structure 23, so that it can be ensured that the second bearing 14 inside the first accommodating structure 23 does not have an airflow passing through, and thus the service life of the second bearing 14 inside the first accommodating structure 23 is longer.

Alternatively, the present invention provides a motor in which the front center of the insulating sheath 22 is provided with a convex second receiving structure 25, and a bearing seat 31 is formed at the front center of the front housing 30, the bearing seat 31 being located in the second receiving structure 25, the bearing seat 31 being for receiving the first bearing 13. The second receiving structure 25 is a generally cylindrical blind hole structure, and a receiving space is formed inside the second receiving structure 25 to fit the bearing housing 31 therein; the bearing housing 31 can fit the first bearing 13 and position the first bearing 13. The blind hole structure of the second accommodating structure 25 can protect the bearing seat 31 and the first bearing 13 inside the bearing seat, so that the condition that the fan causes airflow to pass through the first bearing 13 in the working process is avoided; the second receiving structure 25 is a part of the insulating sheath 22, which itself is made of an insulating material, so that the second receiving structure 25 can also serve as an insulator.

Optionally, the motor provided by the present invention further includes a bearing bracket 50, and the bearing bracket 50 is connected to the bearing seat 31 to form a receiving space for receiving the first bearing 13. The bearing bracket 50 also has a shaft hole for allowing the driving shaft 10 to pass through, and typically, the bearing bracket 50 and the first bearing 13 are both mounted on the front end of the driving shaft 10, the first bearing 13 is fitted to the bearing housing 31, and then the bearing bracket 50 is mounted on the first bearing 13.

Alternatively, the present invention provides a motor in which the bearing bracket 50 is made of an insulating material, and the bearing bracket 50 can protect the first bearing 13.

Alternatively, in the motor provided by the present invention, the supporting rod 26 has a groove structure, and the connecting rod 32 is fitted into the groove; correspondingly, the bearing bracket 50 is provided with an extension portion 46 corresponding to the connecting rod 32, the extension portion 46 and the support rod 26 are positioned at two sides of the connecting rod 32, and the extension portion 46 is butted with the groove structure to form a space for accommodating the connecting rod 32. Each extension portion 46 and the corresponding support rod 26 are butted against each other from both sides of the corresponding connecting rod 32 and surround the connecting rod 32, so that a mutually embedded and matched connecting structure is formed among the extension portions, the connecting rod 32 and the support rod, the structural strength of the bearing seat is further improved, and the first bearing 13 is more stably fixed.

Alternatively, the present invention provides a motor wherein the second receiving structure 25 is a cylindrical cavity; a terminal plate 51 is also arranged outside the second containing structure 25, and the terminal plate 51 is also circular; the connecting guide posts 48 of each stator module are respectively connected to the terminal plate 51, and at this time, an opening structure is correspondingly arranged on the terminal plate 51 for the connecting guide posts 48 to pass through and fix the connecting guide posts 48. The terminal plate 51 is engaged with the second receiving structure 25 at the front end of the insulating sheath 22, and the second receiving structure 25 provides a supporting function for the terminal plate 51. The terminal plate 51 is also made of an insulating material.

Optionally, the motor provided by the present invention further includes:

and a control box 52 connected to the terminal board 51 and electrically connected to the connection guide 48 of each core module through a line on the terminal board 51.

Optionally, the present invention provides an electric machine, wherein the stator module comprises a core block 41, a coil support 42, a stator coil 43, and an insulating support 44, wherein: the iron core blocks 41 are longitudinally connected to the inner wall of the iron core outer ring 40, the iron core blocks 41 and the iron core outer ring 40 form an iron core of the whole stator, the iron core blocks 41 are directly and fixedly connected with the iron core outer ring 40, and a large contact surface is arranged between the iron core blocks and the iron core outer ring 40, so that the iron core blocks and the iron core outer ring are in full contact, and a magnetic conduction function is better provided; the coil support 42 is connected inside the core outer ring 40 and is integrally injection-molded with the core block 41, the coil support 42 is made of an insulating material, and can be a plastic material, so that the coil support 42 and the core block 41 are integrally injection-molded; the stator coil 43 is wound on the coil support 42; the insulating support 44 is located in the core outer ring 40 and abuts between two adjacent coil supports 42, and the insulating support 44 may have a V-shaped structure, which functions to provide an insulating medium together with the coil supports 42 to prevent creepage.

Optionally, in the motor provided by the present invention, a ventilation aperture 49 is formed between the insulating support 44 and the stator coil 43, and the coil support 42, and the ventilation aperture 49 is communicated with the air inlet and the air outlet, so that not only the air guiding channel can be increased to increase the air volume, but also the stator coil 43 can be cooled to directly take away the heat of the stator coil 43.

Alternatively, the present invention provides a motor, wherein two connecting guide posts 48 are disposed on two sides of the coil support 42, the two connecting guide posts 48 are correspondingly connected to two ends of the stator coil 43, the connecting guide posts 48 are made of metal material, so as to provide supporting and conducting functions, and when the two connecting guide posts 48 are connected to an external circuit to form a closed circuit, the stator coil can be electrified to work to form a magnetic field.

Alternatively, in the motor provided by the present invention, the core block 41 has an inverted T shape; the core blocks 41 are three, distributed in a regular triangle around the rotor 11, and define a through hole in the middle to be fitted with the rotor 11. The number of the core blocks 41 is preferably three, and the three core blocks are all arc-shaped at the middle positions and integrally spliced to form a circular hole for accommodating the rotor. In this embodiment, as shown in fig. 6, the structure of the coil support 42 is adapted to the shape of the core block 41, and the core block 41 is covered by the coil support 42 except for the arc-shaped portion engaged with the rotor and the portion abutting against the dovetail groove of the core outer ring 40, and the coil support is made of an insulating material, so that the coil support 42 can provide the functions of insulation and preventing creepage.

Optionally, in the motor provided by the present invention, the inner wall of the core outer ring 40 is provided with a dovetail groove arranged longitudinally corresponding to the connection portion of the core block 41, the core block 41 is installed in the dovetail groove, and the core block 41 is connected to the inner wall of the core outer ring 40 through the dovetail groove structure, so that the connection is more stable.

Alternatively, the present invention provides a motor in which the middle of the insulating support 44 is provided with a longitudinal protrusion, and the longitudinal protrusion separates two adjacent core blocks 41, so that the insulating support 44 performs auxiliary fixing on the core blocks 41.

The invention also provides a blowing device using the motor. According to the motor provided by the invention, the wind guide channel is arranged on the stator component, and negative pressure wind suction is realized in a fan rear-mounted mode, so that the energy loss of the wind guide channel is reduced to the maximum extent, and the viscous effect of gas in a gap between the stator and the rotor on the rotation of the rotor is reduced in a negative pressure mode. Therefore, the air blowing equipment provided by the invention can improve the air volume and reduce the air noise.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above examples only show some embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. An electric machine comprising:

a rear housing (21);

a drive shaft (10) coaxially arranged in the rear housing (21);

a rotor (11) connected to the drive shaft (10);

the stator assembly is arranged outside the rotor (11), and is provided with a wind guide channel which extends along a direction parallel to the axial direction of the motor and penetrates through the front end and the rear end of the stator assembly;

the front shell (30) is connected to the outside of the stator assembly, at least part of the front shell (30) is fixed in the rear shell (21), and the front end of the front shell is provided with a hollow structure communicated with the air guide channel;

a fan (12) connected to the drive shaft (10) and located on a rear side of the stator assembly.

2. The electric machine according to claim 1, characterized in that the rear housing (21) is provided with an air outlet (27) of the electric machine, and the air outlet (27) of the electric machine is located at the rear side of the fan (12).

3. A machine as claimed in claim 2, characterized in that the direction of gas flow at the outlet opening (27) of the machine is parallel to the direction of gas flow in the machine.

4. The electric machine according to claim 2, characterized in that the air intake of the electric machine is arranged in correspondence of the hollowed-out structure of the front housing (30).

5. The machine according to any of claims 1-4,

wherein the stator assembly includes:

the iron core outer ring (40) is of a cylindrical hollow structure, and air guide holes extending in a direction parallel to the axial direction of the motor are formed in the inner wall of the iron core outer ring (40);

and the at least two stator modules are connected in the iron core outer ring (40), and the air guide holes are positioned between the stator modules.

6. The electric machine of claim 5,

the inner wall of the iron core outer ring (40) forms an arc-shaped bulge along the radial direction, and the air guide hole (45) is formed in the arc-shaped bulge.

Preferably, the number of the air guide holes (45) is several, and all the air guide holes (45) are symmetrically arranged or uniformly distributed in the circumferential direction.

Preferably, the front case (30) has a wind guide groove (33) arranged along a longitudinal direction;

the air guide groove (33) is arranged on the outer side of the front shell (30) to form an air guide channel with the rear shell (21); alternatively, the air guide groove (33) is provided inside the front casing (30) to form an air guide passage with the stator assembly.

Preferably, air guide blades (24) are further arranged in the rear shell (21) on the rear side of the fan (12), the periphery of each air guide blade (24) is connected to the inner wall of the rear shell (21), a concave first accommodating structure (23) is formed in the center of the fan (12), and the tail end of the driving shaft (10) is connected into the first accommodating structure (23).

7. The electric machine of claim 6,

the front shell is characterized by further comprising an insulating outer sleeve (22), the insulating outer sleeve (22) and the rear shell (21) are in butt joint to form a cylindrical accommodating space, the front end of the front shell (30) is located in the insulating outer sleeve (22), and the rear end of the front shell is located in the rear shell (21); the air inlet position of the motor is located on the front end face of the insulating outer sleeve (22) and the front end face of the front shell (30).

Preferably, the front end of the insulating outer sleeve (22) is provided with a hollow structure and corresponds to the hollow structure of the front end of the front shell (30).

Preferably, a first bearing (13) is arranged on the driving shaft (10) at the front end of the rotor (11), a second bearing (14) is arranged on the driving shaft (10) at the rear end of the rotor (11), and the rear end of the second bearing (14) is abutted to a pre-pressing spring (15);

the second bearing (14) and the pre-compression spring (15) are placed in the first containing structure (23), and a clearance fit is adopted between the second bearing (14) and the inner wall of the first containing structure (23).

8. The electric machine according to claim 7, characterized in that the pre-compression spring (15) has one end abutting against the bottom of the first receiving structure (23) and the other end abutting against or connected to the second bearing (14), and that an air hole is provided in the bottom of the first receiving structure (23) to balance the air pressure inside and outside the first receiving structure (23).

Preferably, the center of the fan (12) is provided with a concave hole (121) which can be sleeved outside the first accommodating structure (23), and a gap is reserved between the concave hole (121) and the outer wall of the first accommodating structure (23).

Preferably, the center of the front end of the insulating outer sleeve (22) is provided with a convex second accommodating structure (25), a bearing seat (31) is formed in the center of the front end of the front shell (30), the bearing seat (31) is positioned in the second accommodating structure (25), and the bearing seat (31) is used for accommodating the first bearing (13).

Preferably, the front end face of the insulating outer sleeve (22) is a first hollow structure, and the first hollow structure specifically comprises: the second containing structure (25) is connected with the side wall of the insulating outer sleeve (22) through a support rod (26); the preceding terminal surface of anterior casing (30) is second hollow out construction, second hollow out construction is: the bearing seat (31) is connected with the side wall of the front shell (30) through a connecting rod (32); and the positions of the support rods and the connecting rods (32) in the circumferential direction correspond to each other one by one.

Preferably, the bearing bracket (50) is further included, and the bearing bracket (50) is in fit connection with the bearing seat (31) to form a containing space for containing the first bearing (13).

Preferably, the bearing bracket (50) is made of an insulating material.

Preferably, the support rod (26) has a groove structure, and the connecting rod (32) is arranged in the groove structure; correspondingly, the bearing bracket (50) is provided with an extending part (46) corresponding to the connecting rod (32), the extending part (46) and the supporting rod (26) are positioned at two sides of the connecting rod (32), and the extending part (46) and the groove structure are butted to form a space for accommodating the connecting rod (32).

Preferably, the second containing structure (25) is a cylindrical cavity; a terminal plate (51) is arranged on the outer side of the second accommodating structure (25), and the terminal plate (51) is also circular; the connecting guide post (48) of each stator module is connected to the terminal plate (51) respectively.

Preferably, the method further comprises the following steps:

and the control box (52) is connected to the terminal board (51) and is conducted with the connecting guide post (48) of each iron core module through a line on the terminal board (51).

9. The electric machine of claim 5,

the stator module includes:

a core block (41) attached to an inner wall of the core outer ring (40) in a longitudinal direction;

a coil support (42) connected inside the core outer ring (40) and integrally injection-molded with the core block (41);

a stator coil (43) wound on the coil support (42);

and the insulating supports (44) are positioned in the iron core outer ring (40) and abut between two adjacent coil supports (42).

Preferably, a ventilation aperture extending in a direction parallel to an axial direction of the motor is formed between the insulating bracket (44) and the stator coil (43).

Preferably, two connecting guide posts (48) are arranged on two sides of the coil support (42), and the two connecting guide posts (48) are correspondingly connected with two ends of the stator coil (43).

Preferably, the core block (41) is in an inverted T shape; the number of the core blocks (41) is three, the core blocks are distributed around the rotor (11) in a regular triangle, and a through hole is formed in the middle to be assembled with the rotor (11).

Preferably, a dovetail groove which is longitudinally arranged is arranged on the inner wall of the iron core outer ring (40) corresponding to the connecting part of the iron core block (41), and the iron core block (41) is installed in the dovetail groove.

Preferably, the insulating support (44) is provided in the middle with a longitudinal projection separating two adjacent core blocks (41).

10. A blowing device, characterized in that a motor according to any of the preceding claims 1-9 is used.

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