CN218335464U - Motor and use its equipment of blowing - Google Patents

Abstract

The utility model discloses a motor and use its equipment of blowing, motor wherein, include: the fan comprises a driving shaft, a rotor and a fan, wherein the rotor is connected to the driving shaft; the fan is connected to the driving shaft and is positioned at the rear end of the rotor; the driving shaft at the front end of the rotor is provided with a first bearing, the driving shaft at the rear end of the rotor is provided with a second bearing, and the rear end of the second bearing is connected or abutted to the pre-pressing spring. The utility model provides a motor, with the pre-compaction spring unilateral arrange on the drive shaft to make the fan arrange and realize the negative pressure induced draft in the rear end, reduce the hysteresis of air current when the rotor runs at a high speed, thus can be through the pre-compaction of pre-compaction spring, make the rotor can stable operation under higher rotational speed; 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, and the axial movement of the driving shaft caused by the speed change of the fan after the motor is assembled is avoided.

Description

Motor and use its equipment of blowing

Technical Field

The utility model relates to a motor field especially relates to a motor and use its blowing equipment.

Background

The motor for the existing blower adopts the structure that the spring is arranged in the middle of the double bearing structure, and the axial acting force is brought to the driving shaft by the rotation of the blower for blowing or air suction in the running process of the motor; 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.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a technical problem that will solve lies in, provides a motor and uses its equipment of blowing, arranges the spring unilateral in the drive shaft, and the precompression direction that applys to the epaxial bearing of drive is the same with the effort direction of fan, solves the fan with higher speed and the problem of deceleration in-process drive shaft drunkenness.

In order to solve the technical problem, the utility model provides a motor, include:

a drive shaft;

a rotor connected to the drive shaft;

a fan connected to the driving shaft and located at a rear end of the rotor;

the rotor is characterized in that a first bearing is arranged on the driving shaft at the front end of the rotor, a second bearing is arranged on the driving shaft at the rear end of the rotor, the rear end of the second bearing is connected or abutted to a pre-pressing spring, and the diameter of the pre-pressing spring is smaller than or equal to the outer diameter of the second bearing.

Optionally, the utility model provides a motor still includes:

a stator assembly;

a rear housing having a cylindrical structure, the rear housing being fixed to an outside of the stator assembly and accommodating the fan therein;

the center of the rear shell is provided with a first concave accommodating structure, the second bearing and the pre-pressing spring are arranged in the first accommodating structure, and the second bearing is in clearance fit with the inner wall of the first accommodating structure.

Optionally, the utility model provides a motor, pre-compaction spring one end butt first containment structure's bottom, other end butt or connection the second bearing first containment structure's bottom is equipped with the gas pocket to balanced first containment structure inside and outside atmospheric pressure.

Optionally, the utility model provides a motor, the diameter of gas pocket is less than the diameter of pre-compaction spring.

Optionally, the utility model provides a motor, the drive shaft passes stretch into behind the second bearing in the pre-compaction spring, the diameter of pre-compaction spring is greater than the diameter of drive shaft.

Optionally, the utility model provides a motor still includes:

a front housing connected to an outside of the stator assembly;

at least part of the front shell is fixed in the rear shell, and optionally, the rear shell and the front shell are connected by adopting a shrink fit process.

Optionally, the present invention provides an electric machine, wherein the front housing has a wind guide slot 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, the utility model provides an electric machine, stator assembly, include:

the iron core outer ring is of a cylindrical hollow structure;

and the stator module is connected in the iron core outer ring.

The stator module includes:

the iron core block is longitudinally connected to the inner wall of the iron core outer ring;

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.

Optionally, the utility model provides a motor, the insulating support with form the ventilation hole between stator coil, the coil support.

Optionally, the utility model provides a motor the insulating support outside be equipped with in the iron core outer loop inner wall along being on a parallel with drive the wind-guiding hole that axial direction extends.

Optionally, the utility model provides a motor, a serial communication port, the inner wall of iron core outer loop is protruding along radial formation arc, the wind-guiding hole is seted up in the arc is protruding.

Optionally, the utility model provides a motor, the wind-guiding hole has a plurality of, and all the wind-guiding hole sets up or evenly distributed at the circumferencial direction symmetry.

Optionally, the utility model provides a motor, coil bracket's front end is equipped with two and connects the guide pillar, two connect the guide pillar with stator coil's both ends correspond to be connected.

Optionally, in the motor provided by the present 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, the utility model provides a motor corresponds the connection position of iron core piece be equipped with longitudinal arrangement's dovetail on the inner wall of iron core outer loop, the iron core piece is installed in the dovetail.

Optionally, the utility model provides a motor, first containment structure with connect through wind-guiding blade between the inner wall of rear portion casing.

Optionally, the utility model provides a motor encircles the shaft hole of fan is equipped with and can cup joints the outside shrinkage pool of first containment structure, and the shrinkage pool with remain the clearance between the outer wall of first containment structure.

Optionally, the utility model provides a motor still includes:

the insulating outer sleeve is butted with the rear shell to form a cylindrical shell, and the front shell is fixed in the shell; when the air guide groove of the front shell is arranged on the outer side, an air guide channel is formed among the air guide groove, the insulating outer sleeve and the rear shell.

Alternatively, the utility model provides a motor, the front end center of insulating overcoat is equipped with the second containing structure of evagination the front end center of anterior casing forms the bearing frame, the bearing frame is installed in the second containing structure, the bearing frame be used for with first bearing is connected.

Optionally, in the motor provided by the present invention, the second accommodating structure is connected to the side wall of the insulating sheath through a support rod; 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 utility model provides a motor still includes the bearing bracket, the bearing bracket with the bearing frame cooperation is connected, forms and holds the accommodation space of first bearing.

Optionally, the utility model provides a motor, the bearing bracket is made by 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, in the motor provided by the present invention, the second accommodating structure is a cylindrical cavity; a terminal plate 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 utility model provides a motor still includes:

and the control box is connected to the terminal board and is conducted with the connecting guide post of the stator module through a circuit on the terminal board.

The utility model also provides a blowing equipment uses above the motor.

Implement the utility model discloses, following beneficial effect has: 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 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 cross-sectional view of an overall structure of a motor according to an embodiment of the present invention;

fig. 2 is a schematic view of an assembly structure of a motor provided by an embodiment of the present invention (the insulating outer casing and the rear housing are 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 diagram of an internal structure of a motor provided by an embodiment of the present invention;

reference numbers in the figures:

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; 27. air holes;

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. and a control box.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The invention may be embodied in many other forms different from those described herein and similar modifications may be made by those skilled in the art without departing from the spirit and scope of the invention and, therefore, the invention is not to be limited to the specific embodiments disclosed below.

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. 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: the driving shaft 10 at the front end of the rotor 11 is provided with a first bearing 13, the driving shaft 10 at the rear end of the rotor 11 is provided with a second bearing 14, the rear end of the second bearing 14 is connected with or abutted against a pre-pressing spring 15, and the diameter of the pre-pressing spring 15 is smaller than or equal to the outer diameter of the second bearing 14, so that the pre-pressing spring 15 can be abutted against the outer ring of the second bearing.

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.

According to the motor provided by the embodiment, 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 hysteresis effect of air flow when the rotor runs at 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 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.

Optionally, the present embodiment provides the motor, further comprising a stator assembly and a rear housing 21: the stator assembly can play a basic role of the stator, is connected to the outside of the rotor 11 in a matching manner, 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 accommodates the fan 12 therein, 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 an accommodating space and ensure that the rotor 11 and the fan 12 rotate therein;

the center of the rear housing 21 has a first concave accommodating structure 23, the first accommodating structure 23 is generally a cylinder structure with one open end and the other closed or semi-closed end, the second bearing 14 and the pre-pressing spring 15 are disposed in the first accommodating structure 23, the pre-pressing spring 15 is mounted inside the first accommodating structure 23, the second bearing 14 is disposed in the first accommodating structure 23 outside the pre-pressing spring, the first accommodating structure 23 has a depth which can satisfy the requirement that the pre-pressing spring 15 can generate a pre-pressing force on the second bearing 14 after being assembled therein, and the second bearing 14 and the inner wall of the first accommodating structure 23 are in clearance fit, so that the pre-pressing spring 15 can adjust the position of the second bearing in the first accommodating structure 23 through the pre-pressing force.

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 27 to balance the air pressure inside and outside the first accommodating structure 23. In order to prevent the preload spring from falling out of the air hole 27, the diameter of the air hole 27 is smaller than that of the preload spring 15. 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 glue-coated connection between the second bearing 14 and the first accommodating structure 23, the second bearing 14 may not move or may be fixed in a sticking manner due to negative pressure generated inside the first accommodating structure 23 relative to the outside, so that the air hole 27 is designed to balance the pressure difference between the inside and the outside of the first accommodating structure 23, and balance between the inside and the outside of the first accommodating structure 23 is ensured, so that the second bearing 14 may move axially inside the first accommodating structure 23. Since the length of the drive shaft 10 usually protrudes beyond the second bearing 14, the drive shaft 10 extends through the second bearing 14 into the pre-pressure spring 15, and correspondingly the diameter of the pre-pressure spring 15 is larger than the diameter of the drive shaft 10.

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, in which the front casing 30 has the air guiding groove 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, in the motor provided in this embodiment, the stator assembly includes a core outer ring 40 and a stator module, where: 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 the stator coil 43, the insulating support, the core block and the coil support.

Alternatively, the present embodiment provides an electric machine, 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 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 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 driving axial direction, and the wind guide hole 45 is used to increase the area of the wind guide channel, so as to increase the wind volume and take away the heat of the core outer ring 40.

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 in this 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 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, 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 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 are all arc-shaped at the middle positions and integrally spliced to form a circular hole for accommodating the rotor. In this embodiment, the structure of the coil support 42 is adapted to the shape of the core block 41, and the core block is covered by the coil support 42 except for the part matched with the rotor and the part butted with the core outer ring 40, and the coil support is made of insulating material, so that the coil support 42 can provide the functions of insulation and creepage prevention.

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 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 shape, having a cylindrical inner wall, and the outer dimension of the insulating casing is generally the same as that of the rear casing 21, and is also generally cylindrical in shape, and the insulating casing 22 and the rear casing 21 are butted and sealed with each other, so that an air guide passage is provided to prevent air from leaking through the butted position between the two, and the outer diameter profile and the basic length of the entire motor are determined by the insulating casing 22 and the rear casing 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 which protrudes forward to form a boss and forms a receiving space inside the second receiving structure 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 can protect the bearing seat 31 and the first bearing 13 inside the bearing seat; the second receiving structure 25 is also used as an insulating material since the second receiving structure 25 is a part of the insulating sheath 22 and is made of insulating material.

Alternatively, in the motor provided in the present embodiment, the second receiving structure 25 is connected to the side wall of the insulating outer sleeve 22 through the supporting rods 26 disposed in the radial direction of the insulating outer sleeve 22, 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 correspond to each other, 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 of the present embodiment is provided, 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 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. 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, and the control box 52 is connected to the terminal board 51 and is conducted with the connection 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 hair dryer. 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.

All possible combinations of the technical features in the above embodiments may not be described for the sake of brevity, but should be considered as being within the scope of the present disclosure as long as there is no contradiction between the combinations of the technical features.

The above embodiments only represent several embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the concept of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (27)

1. An electric machine comprising:

a drive shaft (10);

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

a fan (12) connected to the drive shaft (10) and located at a rear end of the rotor (11); it is characterized in that the preparation method is characterized in that,

the rotor structure is characterized in that 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), the rear end of the second bearing (14) is connected or abutted to a pre-pressing spring (15), and the diameter of the pre-pressing spring (15) is smaller than or equal to the outer diameter of the second bearing (14).

2. The electric machine of claim 1,

further comprising:

a stator assembly;

a rear housing (21) having a cylindrical structure, the rear housing (21) being fixed to the outside of the stator assembly and accommodating the fan (12) therein;

wherein, the center of the rear shell (21) is provided with a concave first containing structure (23), the second bearing (14) and the pre-pressing spring (15) are arranged 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).

3. The electric machine of claim 2,

one end of the pre-pressing spring (15) is abutted against the bottom of the first accommodating structure (23), the other end of the pre-pressing spring is abutted against or connected with the second bearing (14), and an air hole (27) is formed in the bottom of the first accommodating structure (23) so as to balance air pressure inside and outside the first accommodating structure (23).

4. An electric machine according to claim 3, characterized in that the diameter of the air hole (27) is smaller than the diameter of the pre-stressing spring (15).

5. The machine according to claim 2, characterized in that the drive shaft (10) extends through the second bearing (14) into the pre-stressing spring (15), the diameter of the pre-stressing spring (15) being larger than the diameter of the drive shaft (10).

6. The electric machine of claim 2,

further comprising:

a front housing (30) connected to an exterior of the stator assembly;

at least part of the front shell (30) is fixed in the rear shell (21), and optionally, the rear shell (21) and the front shell (30) are connected by a shrink-fit process.

7. The electric machine of claim 6,

the front housing (30) has a wind guide groove (33) arranged along the 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.

8. The electric machine of claim 2,

the stator assembly, comprising:

an iron core outer ring (40) which is a cylindrical hollow structure;

and the stator module is connected in the iron core outer ring (40).

9. The electric machine of claim 8,

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 injection-molded integrally with the core block (41);

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

and the insulation bracket (44) is positioned in the iron core outer ring (40) and is abutted between two adjacent coil brackets (42).

10. The electrical machine of claim 9,

and ventilation holes are formed among the insulating bracket (44), the stator coil (43) and the coil bracket (42).

11. The electric machine of claim 9,

and a wind guide hole extending along the direction parallel to the driving axial direction is arranged in the inner wall of the iron core outer ring (40) on the outer side of the insulating support (44).

12. The electrical machine of claim 11,

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.

13. The electrical machine of claim 11,

the air guide holes (45) are provided with a plurality of air guide holes, and all the air guide holes (45) are symmetrically arranged or uniformly distributed in the circumferential direction.

14. The electric machine of claim 9,

the front end of the coil support (42) is provided with two connecting guide posts (48), and the two connecting guide posts (48) are correspondingly connected with the two ends of the stator coil (43).

15. The electric machine of claim 9,

the iron 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).

16. The electrical machine of claim 9,

and dovetail grooves which are longitudinally arranged are arranged on the inner wall of the iron core outer ring (40) corresponding to the connecting parts of the iron core blocks (41), and the iron core blocks (41) are arranged in the dovetail grooves.

17. The electric machine of claim 2,

the first accommodating structure (23) is connected with the inner wall of the rear shell (21) through an air guide blade (24).

18. The electric machine of claim 17,

encircle the shaft hole of fan (12) is equipped with and can cup joint shrinkage pool (121) the first containment structure (23) outside, and shrinkage pool (121) with remain the clearance between the outer wall of first containment structure (23).

19. The electric machine of claim 6,

further comprising:

an insulating outer sleeve (22), wherein the insulating outer sleeve (22) is butted with the rear shell (21) to form a cylindrical shell, and the front shell (30) is fixed in the shell; when the air guide groove (33) of the front shell (30) is arranged on the outer side, an air guide channel is formed among the air guide groove (33), the insulating outer sleeve (22) and the rear shell (21).

20. The electric machine of claim 19,

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

21. The electrical machine of claim 20,

the second containing structure (25) is connected with the side wall of the insulating outer sleeve (22) through a support rod (26); 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 (26) and the connecting rods (32) in the circumferential direction correspond to each other one by one.

22. The electric machine of claim 21,

the bearing support frame further comprises a bearing support frame (50), wherein the bearing support frame (50) is matched and connected with the bearing seat (31) to form an accommodating space for accommodating the first bearing (13).

23. The electrical machine of claim 22,

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

24. The electric machine of claim 22,

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

25. The electric machine of claim 20,

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 posts (48) of each stator module are respectively connected to the terminal plate (51).

26. The electrical machine of claim 25,

further comprising:

and the control box (52) is connected to the terminal plate (51) and is conducted with the connecting guide post (48) of the stator module through a circuit on the terminal plate (51).

27. A blowing device, characterized in that a motor according to any of the preceding claims 1-26 is used.

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