CN115296488A - Assembling method of high-speed motor - Google Patents

Abstract

The invention discloses an assembly method of a high-speed motor, which comprises the following steps: loading the first bearing into the upper housing assembly, and then loading the stator assembly into the upper housing assembly to form a first preassembled assembly; assembling the rotor and the fan on the driving shaft respectively to form a second pre-assembly component; loading the front end of the drive shaft of the second pre-assembled assembly into the bearing seat of the first pre-assembled assembly while the rotor is assembled within the stator assembly; and installing a second bearing at the rear end of a driving shaft of the second pre-assembly, then assembling the lower shell assembly on the second pre-assembly, butting the lower shell assembly with the upper shell assembly, and meanwhile, enabling the pre-pressing spring to abut against the second bearing, so that the pre-pressing spring generates pre-pressing force towards the first bearing direction on the second bearing. The assembly method of the high-speed motor provided by the invention has the advantages that the prepressing spring is arranged on the driving shaft at one side, the fan is arranged at the rear end to realize negative pressure air suction, and the hysteresis effect of air flow when the rotor runs at high speed is reduced.

Description

Assembling method of high-speed motor

Technical Field

The invention relates to the field of motors, in particular to an assembling method of a high-speed motor.

Background

The motor for the existing blower adopts a spring arranged in the middle of a double-bearing structure, and in the running process of the motor, the axial acting force is brought to a driving shaft by the rotation of the blower for blowing or sucking; because the spring is arranged between the bearings at the two sides, the directions of the springs received by the bearings at the two sides are opposite, the stress direction of one bearing is the same as the direction of the acting force of the driving shaft, which is received by the fan, and the stress direction of the other bearing is opposite to the direction of the acting force, which is received by the driving shaft, of the driving shaft, and meanwhile, the magnitude of the acting force of the fan on the driving shaft can also change between 0 and an extreme value due to the change of the rotating speed of the fan, so that the driving shaft has axial movement, and further the working state of the motor is vibrated and unstable.

Disclosure of Invention

The technical problem to be solved by the embodiment of the invention is to provide an assembling method of a high-speed motor, and solve the problem that a driving shaft generates axial movement in the motor assembling process.

In order to solve the technical problem, the invention provides an assembly method of a high-speed motor, which comprises the following steps:

respectively providing an upper shell assembly, a first bearing and a stator assembly;

loading the first bearing into the upper housing assembly, followed by loading the stator assembly into the upper housing assembly to form a first preassembled assembly;

providing a rotor, a drive shaft and a fan, respectively;

assembling the rotor and the fan to the drive shaft, respectively, to form a second preassembled assembly;

loading the forward end of the drive shaft of the second pre-assembled assembly into the bearing housing of the first pre-assembled assembly while the rotor is assembled within the stator assembly;

providing a second bearing, a lower housing assembly with a pre-compressed spring;

and mounting the second bearing at the rear end of a driving shaft of the second pre-assembly, then assembling the lower shell assembly on the second pre-assembly, butting the lower shell assembly with the upper shell assembly, and enabling the pre-pressing spring to abut against the second bearing to generate pre-pressing force towards the first bearing on the second bearing.

Optionally, the assembly method provided by the present invention, wherein the providing of the upper housing assembly, comprises:

providing a front housing and a bearing bracket, respectively;

loading the first bearing into the upper housing assembly, comprising:

the first bearing is glued and then placed into the front housing, and the bearing bracket is then installed.

Optionally, the present invention provides an assembly method, said providing a stator assembly comprising:

respectively providing a stator outer ring, an insulating bracket and a stator module;

loading the stator module into the stator outer ring;

and the insulating support is arranged between two adjacent stator modules in the stator outer ring.

Optionally, the assembly method provided by the present invention, providing a stator module, includes:

respectively providing a core block, a coil support and a stator coil;

and the iron core block and the coil support are integrally molded by injection, and the stator coil is wound on the coil support.

Alternatively, the present invention provides an assembling method, wherein the assembling the rotor and the fan to the drive shaft respectively, includes:

the rotor is mounted on the driving shaft first, and then the fan is mounted on the driving shaft and the fan is mounted at the rear side of the rotor.

Optionally, the assembly method provided by the present invention, said providing a lower housing assembly, comprises:

respectively providing a rear shell and a pre-pressing spring;

the pre-compression spring is loaded into a first receiving structure of the rear housing.

Optionally, the assembling method provided by the present invention, the butting the lower housing assembly and the upper housing assembly includes:

and (3) after the second bearing is coated with glue, filling the second bearing into a first containing structure of the rear shell, or after the first containing structure is coated with glue on the inner surface, filling the second bearing into the first containing structure.

Optionally, in the assembling method provided by the present invention, the docking of the lower housing assembly and the upper housing assembly includes:

the rear housing is heated and then docked with the exterior of the front housing via a shrink-fitting process.

Optionally, the present invention provides an assembly method, wherein the rear housing is heated and butted against the exterior of the front housing by a shrink-fitting process, and at least a part of the front housing is positioned in the rear housing.

Optionally, the assembling method provided by the present invention further includes:

providing an insulating outer sleeve;

and sleeving the insulating outer sleeve outside the upper shell assembly, and butting and sealing the insulating outer sleeve with the rear shell of the lower shell assembly.

Optionally, the assembling method provided by the present invention further includes:

providing a terminal board and a control box;

mounting the terminal plate at a front end of the insulating sheath;

the control box is mounted on the terminal block.

The implementation of the invention has the following beneficial effects:

according to the assembling method of the high-speed motor, the prepressing spring is arranged on the driving shaft on one side, the fan is arranged at the rear end to realize negative pressure air suction, and the delaying effect of air flow when the rotor runs at a high speed is reduced, so that the rotor can stably run at a high rotating speed through the prepressing action 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 two bearings and the driving shaft are tightly assembled, 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.

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 illustrating an assembly process of a motor according to an embodiment of the present invention.

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. an air guide hole; 46. an extension portion; 47. an arc-shaped bulge; 48. a guide post; 49. a vent aperture;

50. a bearing bracket; 51. a terminal plate; 52. a control box; 55. connecting holes;

61 a first pre-assembled component; 62. a second pre-assembled component.

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 as used herein are for illustrative purposes 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. 5, the present embodiment provides an assembling method of a high-speed motor, including:

respectively providing an upper shell assembly, a first bearing 13 and a stator assembly;

loading the first bearing 13 into the bearing housing 31 of the upper housing assembly, followed by loading the stator assembly into the upper housing assembly, forming a first pre-assembled assembly 61;

providing a rotor 11, a drive shaft 10 and a fan 12, respectively;

assembling the rotor 11 and the fan 12 to the driving shaft 10 respectively to form a second pre-assembled assembly 62, wherein the rotor 11 is located at the front side of the fan 12, the rotor 11 and the fan 12 are assembled to the driving shaft 10 respectively by a fixed connection method, and positions for assembling bearings are reserved at two ends of the driving shaft 10 respectively;

loading the front end of the drive shaft 10 of the second pre-assembly 62 into the bearing housing of the first pre-assembly 61, while the rotor 11 is assembled within the stator assembly;

providing a second bearing 14, a lower housing assembly with a pre-stressed spring 15;

after the second bearing 14 is mounted on the rear end of the driving shaft 10 of the second pre-assembly 62, the lower housing assembly is assembled on the second pre-assembly 62 and butted against the upper housing assembly, and the pre-pressure spring 15 abuts against the second bearing 14, so that the pre-pressure spring 15 generates pre-pressure on the second bearing 14 towards the first bearing 13.

According to the assembling method of the high-speed motor, the prepressing spring 15 is arranged on the driving shaft 10 on one side, the fan 12 is arranged at the rear end to realize negative pressure air suction, the hysteresis effect of air flow when the rotor 11 runs at high speed is reduced, and therefore the rotor 11 can stably run at a high rotating speed through the prepressing action of the prepressing spring 15; the acting force direction of the rotation of the fan 12 on the driving shaft 10 is the same as the pre-pressing direction of the pre-pressing spring 15 on the driving shaft 10, so that the two bearings and the driving shaft 10 are tightly assembled, the axial movement of the driving shaft 10 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 in high-speed rotation is improved.

Optionally, the present invention provides an assembly method wherein:

providing an upper housing assembly comprising:

providing a front housing 30 and a bearing bracket 50, respectively; after the first bearing 13 is fitted into the bearing housing 31 of the front housing 30, the bearing bracket 50 is mounted on the outer side of the first bearing 13;

wherein the first bearing 13 is loaded into the upper housing assembly, comprising:

after the first bearing 13 is glued and installed in the bearing seat 31 of the front housing 30, a bearing bracket 50 is installed on the outer side of the first bearing 13, and the bearing bracket 50 and the bearing seat 31 are connected in a matched-position manner through the corresponding connecting rod 32 and the corresponding extending part 46 and fixed to each other so as to prevent the bearing bracket 50 from rotating.

Optionally, in the assembling method provided by the present invention, a stator assembly is provided, including:

providing a stator outer ring 40, an insulating support 44 and a stator module respectively;

loading the stator modules into the stator outer ring 40;

the insulating support 44 is installed between two adjacent stator modules in the stator outer ring 40, so that the protrusion in the middle of the insulating support 44 abuts against the iron core blocks of the stator modules on both sides, and the stator modules are fixed in the stator outer ring 40.

Optionally, the assembly method provided by the present invention provides a stator module, comprising:

providing a core block 41, a coil support 42 and a stator coil 43 respectively;

the core block 41 and the coil support 42 are integrally injection-molded, the stator coil 43 is wound on the coil support 42, the coil support 42 is molded on the core block 41 by means of integral injection molding, the core block 41 can be insulated by the insulating material of the coil support 42, and a carrier is provided for winding the stator coil 43.

Alternatively, the present invention provides an assembling method for assembling the rotor 11 and the fan 12 to the driving shaft 10, respectively, including:

the rotor 11 is first mounted on the driving shaft 10, the fan 12 is then mounted on the driving shaft 10, and the fan 12 is mounted on the rear side of the rotor 11.

Optionally, the assembly method provided by the present invention provides a lower housing assembly comprising:

respectively providing a rear shell 21 and a pre-pressing spring 15;

the pre-compression spring 15 is installed in the first accommodating structure 23 of the rear housing 21, the pre-compression spring 15 is generally cylindrical, and the pre-compression spring 15 has certain elasticity and can generate rebound force after being pressed. In this embodiment, the preload spring 15 is pressed and deformed by abutting against the second bearing 14, thereby generating a preload force on the second bearing 14 and pushing the second bearing 14 in the direction of the first bearing 13.

Optionally, the assembling method provided by the present invention, the butting the lower housing assembly and the upper housing assembly comprises:

the second bearing 14 is glued and inserted into the first housing structure 23 of the rear shell 21, or the second bearing 14 is inserted into the first housing structure 23 after the inner surface of the first housing structure 23 is glued.

Optionally, in the assembling method provided by the present invention, the docking of the lower housing assembly and the upper housing assembly includes:

the rear case 21 is heated and then docked with the exterior of the front case 30 by a shrink-fit process.

Further, after the rear case 21 is heated and butted with the outside of the front case 30 by a shrink-fit process, at least a portion of the front case 30 is located inside the rear case 21. Specifically, a portion of front housing 30 close to fan 12 is located inside rear housing 21, and another portion is exposed from inside rear housing 21.

Optionally, the assembling method provided by the present invention further includes:

providing an insulating outer jacket 22;

an insulating outer jacket 22 is fitted over the exterior of the upper housing assembly and is butted and sealed to the rear housing 21 of the lower housing assembly.

Optionally, the assembling method provided by the present invention further includes:

providing a terminal board 51 and a control box 52; the terminal plate 51 is made of an insulating material, and as shown in fig. 3, a connecting hole 55 is formed in the terminal plate 51 at a position corresponding to the guide post 48 of the stator assembly, so that the guide post 48 can pass through the connecting hole 55 and be fixed to the connecting hole 55 (generally, the guide post 48 can be fixed to the connecting hole 55 by welding, but not limited thereto, a person skilled in the art can also use other common manners to fix the guide post 48 to the connecting hole 55); the terminal board 51 is also provided with a wire or a printed circuit to make the guide post 48 conducted to a circuit or a chip on the control box 52;

a terminal plate 51 is mounted on the front end of the insulating sheath 22;

the control box 52 is mounted on the terminal board 51, the control box 52 is provided with a corresponding circuit or an integrated chip, and can be conducted with the guide post 48 through a printed circuit on the terminal board 51, when the control box 52 is connected with an external power supply, the stator coil 43 can work to generate a magnetic field, so that the rotor 11 is driven to rotate, and the fan 12 is driven to rotate.

As shown in fig. 1 to 4, the present embodiment provides a motor including a driving shaft 10, a rotor 11, and a fan 12, wherein: the rotor 11 is connected to the drive shaft 10; the fan 12 is connected to the driving shaft 10 and located at the rear end of the rotor 11, the rotor 11 rotates under the action of the changing magnetic field of the stator, and then the fan 12 is driven to operate, and because the fan 12 is located at the rear end of the rotor 11, a negative pressure air suction effect can be generated on a motor main body at the position of the rotor 11 in the rotating process of the fan 12;

in this embodiment, two bearings are installed on the driving shaft 10, and the pre-pressing spring 15 is arranged at one end of the fan 12 to make the axial acting force of the fan 12 on the driving shaft 10 and the pre-pressing direction of the pre-pressing spring 15 on the driving shaft 10 the same, so as to avoid axial movement of the driving shaft caused by the change of the fan speed, reduce vibration, and improve the stability of the motor during high-speed rotation, and the technical scheme of this embodiment is specifically realized by the following arrangement: a first bearing 13 is provided on the drive shaft 10 at the front end of the rotor 11, a second bearing 14 is provided on the drive shaft 10 at the rear end of the rotor 11, and the rear end of the second bearing 14 is connected to or abutted against a preload spring 15.

In this embodiment, in order to complete the structure of the motor, basic structural elements, such as a housing, a stator, a control unit, etc., need to be used in the implementation process.

The front end and the rear end are described relative to the rotor, generally, the front end refers to one end of the air inlet of the whole motor, and the rear end refers to one end of the air outlet of the whole motor.

In the motor provided by the embodiment, the pre-pressing spring 15 is arranged on the driving shaft 10 on one side, and the fan 12 is arranged at the rear end to realize negative pressure air suction, so that the hysteresis effect of air flow when the rotor 11 runs at high speed is reduced, and the rotor can stably run at a higher rotating speed through the pre-pressing effect of the pre-pressing spring 15; the acting force direction of the rotation of the fan 12 on the driving shaft 10 is the same as the pre-pressing direction of the pre-pressing spring 15 on the driving shaft 10, so that the driving shaft 10 is tightly assembled between the two bearings, the axial movement of the driving shaft 10 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 in high-speed rotation is improved.

Optionally, the motor provided in this embodiment further includes a stator assembly and a rear housing 21: the stator assembly can play a basic function of the stator, is connected to the outside of the rotor 11 in a matching way, and enables the rotor 11 to rotate under the driving of the stator assembly; the rear shell 21 has a cylindrical structure, the rear shell 21 is fixed outside the stator assembly and holds the fan 12 in the stator assembly, and the rear shell 21 is connected with the stator assembly, so that the rear shell 21 and the stator assembly can be fixed with each other to form a holding space, and the rotor 11 and the fan 12 can be ensured to rotate in the holding space;

wherein, the center of the rear housing 21 has a concave first containing structure 23, the first containing structure 23 is a cylinder structure with one open end and the other closed or semi-closed end, the second bearing 14 and the pre-pressure spring 15 are arranged in the first containing structure 23, wherein the pre-pressure spring 15 is arranged inside the first containing structure 23, the second bearing 14 is arranged in the first containing structure 23 outside the pre-pressure spring 15, that is, the second bearing 14 is closer to the stator assembly relative to the pre-pressure spring 15; the depth of the first receiving structure 23 is such that after the pre-pressure spring 15 is assembled therein, a pre-pressure action is exerted on the second bearing 14, and a clearance fit is adopted between the second bearing 14 and the inner wall of the first receiving structure 23, so that the pre-pressure spring 15 can adjust the position of the second bearing 14 in the first receiving structure 23 through the pre-pressure.

Alternatively, the motor provided in this embodiment has one end of the pre-pressing spring 15 abutting against the bottom of the first accommodating structure 23 and the other end abutting against or connected to the second bearing 14, and the bottom of the first accommodating structure 23 is provided with an air hole 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, the motor provided in this embodiment further includes a front housing 30, the front housing 30 is connected to the outside of the stator assembly for providing a fixed space for the stator assembly; at least a portion of the front housing 30 is fixed in the rear housing 21, and optionally, the rear housing 21 and the front housing 30 are connected by shrink fit process, so that the rear housing 21 and the front housing 30 can be fixed to each other to form a receiving space for ensuring the rotor 11 and the fan 12 to rotate therein.

Alternatively, the present embodiment provides the motor, the front casing 30 has the air guiding 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, thereby enlarging the section of the air guide channel and enlarging the air volume.

Optionally, this embodiment provides an electric machine, wherein the stator assembly includes a core outer ring 40 and a stator module, wherein: the core outer ring 40 is a cylindrical hollow structure, and is generally a cylinder structure, so as to provide an installation space for the stator module; the stator modules are connected in the core outer ring 40, the stator modules can be 3 groups, and are uniformly distributed on the inner circumference of the core outer ring 40, and the stator modules are used for providing a stator coil 43, an insulating support 44, a core block 41 and a coil support 42.

Alternatively, the present embodiment provides a motor, in which the stator module includes 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 formed between the iron core blocks 41 and the iron core outer ring 40, so that the iron core blocks are fully contacted, 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; an 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 in this embodiment, a ventilation hole 49 is formed between the insulating support 44 and the stator coil 43, and the coil support 42, and the ventilation hole 49 is communicated with the air inlet and the air outlet, so that not only the air guiding channel can be increased and the air volume is larger, but also the stator coil 43 can be cooled, and the heat of the stator coil 43 can be directly taken away.

Alternatively, in the motor provided in this embodiment, the inner wall of the core outer ring 40 outside the insulating support 44 is provided with a wind guide hole 45 extending in a direction parallel to the axial direction of the motor, and the wind guide hole 45 is used to increase the area of the wind guide channel, so that the wind volume is larger, and at the same time, the heat of the core outer ring 40 can be taken away.

Alternatively, in the motor provided in this embodiment, an arc protrusion 47 is radially formed on the 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 matched with 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 embodiment, 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 guide holes 45 may be selectively determined according to the number of the stator modules, and one air guide hole 45 is disposed between two adjacent coil brackets 42.

Alternatively, in the motor provided in the present embodiment, the front end of the coil support 42 is provided with two connecting guide posts 48, the two connecting guide posts 48 are correspondingly connected with the two ends of the stator coil 43, and the connecting guide posts 48 are respectively made of metal materials, so that the supporting and conducting functions can be provided, and when the two connecting guide posts 48 are connected with an external circuit to form a closed loop, the stator coil 43 can be electrified to work to form a magnetic field.

Alternatively, in the motor provided in this embodiment, the iron core block 41 has an inverted T shape; the core blocks 41 are three, distributed in a regular triangle around the rotor 11, and have a through-hole formed 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 41 are all arc-shaped at the middle positions and integrally spliced to form a circular hole for accommodating the rotor 11. In the present embodiment, 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 portion cooperating with the rotor 11 and the portion abutting against the core outer ring 40, and the coil support 42 is made of an insulating material, so that the coil support 42 can provide the functions of insulation and preventing creepage.

Alternatively, the motor provided in this embodiment is provided with a dovetail groove longitudinally arranged on the inner wall of the core outer ring 40 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, in the motor provided in the present embodiment, the first accommodating structure 23 is connected to the inner wall of the rear housing 21 through the wind guiding blade 24, 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 wind guiding blade 24.

Optionally, the motor that this embodiment provided, the shaft hole that encircles fan 12 is equipped with can cup joint the shrinkage pool 121 in first containment structure 23 outside to remain the clearance between shrinkage pool 121 and the outer wall of first containment structure 23, shrinkage pool 121 cup joints the outside at first containment structure 23, can guarantee that the inside second bearing 14 of first containment structure 23 can not have the air current to pass through, thereby make the inside second bearing 14's of first containment structure 23 life more permanent.

Optionally, the motor provided in this embodiment further includes an insulating outer casing 22, the insulating outer casing 22 is butted with the rear casing 21 to form a cylindrical outer casing, and the front casing 30 is fixed in the cylindrical outer casing; 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.

Alternatively, the present embodiment provides the motor, the center of the front end of the insulating outer casing 22 is provided with a convex second receiving structure 25, a bearing seat 31 is formed at the center of the front end of the front housing 30, the bearing seat 31 is installed in the second receiving structure 25, and the bearing seat 31 is used for connecting with the first bearing 13. The second receiving structure 25 is a generally cylindrical blind hole structure, the second receiving structure 25 protrudes forward to form a boss, 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 therein, so as to prevent the fan from causing air flow to pass through the first bearing 13 in the working process; 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.

Alternatively, in the motor provided in this embodiment, the second receiving structure 25 is connected to the side wall of the insulating outer sleeve 22 by the supporting rods 26 to form a whole, and the number of the supporting rods 26 is 6, and the supporting rods 26 are radially arranged in six directions, and those skilled in the art will know that the number of the supporting rods 26 may also be 3, 4, 5 or other values greater than 3; the bearing housing 31 is connected to the side wall of the front housing 30 by a connecting rod 32; the positions of the support rods 26 and the positions of the connecting rods 32 in the circumferential direction are in one-to-one correspondence, and the orthographic projections of the support rods 26 and the connecting rods 32 in the axial direction of the motor are in correspondence, namely, the influence on the air inlet surface is reduced as much as possible. When the insulating sheath 22 is sleeved with the front housing 30, the support rods 26 and the connecting rods 32 are correspondingly connected or contacted, thereby enhancing the supporting strength of the whole insulating sheath or the front housing 30 to some extent.

Optionally, the motor provided in this embodiment further includes a bearing bracket 50, and the bearing bracket 50 is connected to the bearing seat 31 in a matching manner to form a receiving space for receiving the first bearing 13. The bearing bracket 50 also has a shaft hole for allowing the drive shaft 10 to pass through, and typically, the bearing bracket 50 and the first bearing 14 are both mounted on the front end of the drive 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 motor provided in the present embodiment may be provided, wherein 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 in the present embodiment, the supporting rod 26 has a groove structure, and the connecting rod 32 is installed in the groove; correspondingly, the bearing bracket 50 is provided with an extension portion 46 corresponding to the connecting rod, the extension portion 46 and the support rod 26 are located at two sides of the connecting rod 32, and the extension portion 46 is abutted with the groove structure to form a space for accommodating the connecting rod 32. The extension portion 46 and the support rod 26 are butted against each other from both sides of the connecting rod 32 and surround the connecting rod 32, so that a mutually embedded and matched connecting structure is formed among the extension portion, the connecting rod and the support rod, the structural strength of the bearing seat is further improved, and the first bearing 13 is more stably fixed.

Alternatively, in the motor provided in the present embodiment, 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 embodiment further includes a control box 52, wherein the control box 52 is connected to the terminal board 51 and is conducted with the connecting guide post 48 of the stator module through a line on the terminal board 51.

The present embodiment also provides a blowing apparatus, which may be a blower. The motor that uses on this blowing equipment is like the motor that above embodiment provided, through using the motor that above embodiment provided, can effectively reduce blowing equipment in the course of the work, and the axial float that the motor rotation produced reduces noise and vibration.

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. A method of assembling a high speed electric machine comprising:

respectively providing an upper shell assembly, a first bearing (13) and a stator assembly;

-loading said first bearing (13) into said upper housing assembly, followed by loading said stator assembly into said upper housing assembly, forming a first pre-assembled assembly (61);

providing a rotor (11), a drive shaft (10) and a fan (12), respectively;

-assembling the rotor (11) and the fan (12) respectively on the drive shaft (10) forming a second pre-assembled assembly (62);

-loading the front end of the drive shaft (10) of the second pre-assembled assembly (62) into the bearing housing of the first pre-assembled assembly (61) while fitting the rotor (11) within the stator assembly;

providing a second bearing (14), a lower housing assembly with a pre-compressed spring (15);

and mounting the second bearing (14) at the rear end of a driving shaft (10) of the second pre-assembly (62), then assembling the lower shell assembly on the second pre-assembly (62), and butting the lower shell assembly with the upper shell assembly, wherein the pre-pressing spring (15) abuts against the second bearing (14) at the same time, so that the pre-pressing spring (15) generates pre-pressing force towards the first bearing (13) on the second bearing (14).

2. The assembly method according to claim 1,

the providing an upper housing assembly, comprising:

providing a front housing (30) and a bearing bracket (50), respectively;

-loading the upper housing assembly with the first bearing (13), comprising:

the first bearing (13) is glued and then placed in the front housing (30), and then a bearing bracket (50) is mounted.

3. The assembly method according to claim 1,

the providing a stator assembly, comprising:

respectively providing a stator outer ring (40), an insulating bracket (44) and a stator module;

-loading the stator module into the stator outer ring (40);

and the insulating bracket (44) is installed between two adjacent stator modules in the stator outer ring (40).

4. Assembly method according to claim 3,

the providing a stator module includes:

respectively providing a core block (41), a coil bracket (42) and a stator coil (43);

the core block (41) and the coil support (42) are integrally injection-molded, and the stator coil (43) is wound on the coil support (42).

5. The assembly method of claim 1,

said assembling of said rotor (11), said fan (12) onto said drive shaft (10), respectively, comprising:

the rotor (11) is installed on the driving shaft (10), then the fan (12) is installed on the driving shaft (10), and the fan (12) is installed on the rear side of the rotor (11).

6. The assembly method according to claim 1,

the providing a lower housing assembly, comprising:

respectively providing a rear shell (21) and a pre-pressing spring (15);

-installing the pre-compression spring (15) in a first housing structure (23) of the rear housing (21).

7. The assembly method of claim 1,

interfacing the lower housing assembly with the upper housing assembly comprises:

-applying glue to the second bearing (14) and inserting it into the first receiving structure (23) of the rear housing (21), or-applying glue to the inner surface of the first receiving structure (23) and inserting the second bearing (14) into the first receiving structure (23).

8. The assembly method of claim 1,

the lower casing subassembly with the butt joint of upper casing subassembly includes:

the rear housing (21) is heated and then docked with the exterior of the front housing (30) by a shrink-fit process.

9. The assembly method according to claim 8, characterized in that said rear shell (21) is heated and docked with the exterior of said front shell (30) by means of a shrink-fit process, said front shell (30) being at least partially located inside said rear shell (21).

10. The method of assembling of claim 8,

further comprising:

providing an insulating outer jacket (22);

and sleeving the insulating outer sleeve (22) outside the upper shell assembly, and butting and sealing the insulating outer sleeve with the rear shell (21) of the lower shell assembly.

Further comprising:

providing a terminal board (51) and a control box (52);

mounting the terminal plate (51) at the front end of the insulating sheath (22);

the control box (52) is mounted on the terminal board (51).

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