CN115765268A

CN115765268A - Split type motor

Info

Publication number: CN115765268A
Application number: CN202211479093.1A
Authority: CN
Inventors: 桂长青; 曹天佑; 李平
Original assignee: Dongguan Chiqu Motor Co ltd
Current assignee: Dongguan Chiqu Motor Co ltd
Priority date: 2022-11-24
Filing date: 2022-11-24
Publication date: 2023-03-07

Abstract

The invention discloses a split type motor, which comprises an air duct and an armature module; the armature module comprises a shell, a stator module, a rotor module and a PCB (printed Circuit Board); the shell is cylindrical, and the rotor assembly comprises a rotating shaft, a magnetic ring, a first bearing and a second bearing; the shell is provided with a first bearing chamber and a second bearing chamber; an elastic piece is arranged between the first bearing and the magnetic ring; the air duct comprises an inner ring and an outer ring which are concentrically arranged; the inner ring surrounding structure is provided with a circular through cavity matched with the shell; a ventilation cavity is formed between the inner ring and the outer ring, and a plurality of guide plates are arranged in the ventilation cavity. So, through designing a split type motor, improved the assembly convenience nature of motor to, through the concrete design to the motor, make it have the advantage that the noise is low, the operation is steady.

Description

Split type motor

Technical Field

The invention relates to the field of motors, in particular to a split-type motor which is mainly but not limited to be applied to a hair drier.

Background

The motor is one of indispensable components and parts of a section of thick bamboo of blowing, and the power and the quality of motor are direct to be concerned with the life and the use experience of a section of thick bamboo of blowing. In order to reduce the noise generated when the motor of the blowing cylinder works, increase the air inlet volume of the blowing cylinder, prolong the service life of the motor and the like; various electric machines are available on the market.

For example, chinese patent No. CN 217335308U discloses a motor for a hair dryer, which is configured to improve stability of a rotor during rotation, reduce vibration, and reduce noise, and in the technology of the patent, a bearing is disposed on a rotating shaft of a rotor assembly, and two bearings are disposed on one side of a magnetic ring; although it can reduce the vibration to some extent, it has disadvantages; firstly, the length of the armature of the motor structure cannot be designed to be too long, and when the armature is too long, the vibration of the armature is more obvious and the noise is large when the motor rotates at high speed; thus, the power density of such motors is also low and not suitable for higher speed rotation. In addition, after the motor is manufactured and molded, the air duct adopted by the motor needs to be clamped and processed twice on a machine tool, so that the production efficiency is reduced;

there are also motors of other structures, such as chinese patent No. CN 217590465U, which discloses a motor for a blower, in which bearings are provided at both ends on a rotating shaft of a rotor assembly, thereby improving stability; however, this technique also has some disadvantages: because 1 bearing chamber is set in the wind channel, another bearing chamber is set on the back cover, the straightness of two bearing chambers is worse, when the rotor component rotates, the stress of 2 bearings is inconsistent, and it can generate bigger noise; and, when the assembly, the back lid locks in the wind channel through the screw, also is comparatively troublesome during the assembly.

Therefore, a new technical solution is needed to solve the above problems.

Disclosure of Invention

In order to solve the defects and shortcomings of the prior art, the invention provides a split type motor, which improves the assembly convenience of the motor by designing the split type motor, and has the advantages of low noise and stable operation by specifically designing the motor.

In order to achieve the purpose, the invention adopts the following technical scheme:

a split type motor comprises an air duct and an armature module; the armature module comprises a machine shell, and a stator assembly, a rotor assembly and a PCB which are arranged in the machine shell; the shell is cylindrical, and an installation cavity is formed in the shell, and a gap communicated with the installation cavity is formed in the shell; wherein:

the rotor assembly comprises a rotating shaft, a magnetic ring arranged on the rotating shaft, a first bearing arranged at the upper end of the rotating shaft and a second bearing arranged at the lower end of the rotating shaft; correspondingly, a first bearing chamber matched with the first bearing and a second bearing chamber matched with the second bearing are arranged on the shell; an elastic part is arranged between the first bearing and the magnetic ring;

the air duct comprises an inner ring and an outer ring which are concentrically arranged; the inner ring surrounding structure is provided with a circular through cavity matched with the shell; a ventilation cavity is formed between the inner ring and the outer ring, and a plurality of guide plates are arranged in the ventilation cavity.

Preferably, the first bearing chamber is protruded at an upper end of the casing, and the second bearing chamber is protruded at a lower end of the casing.

Preferably, the notch of the housing is arc-shaped, and the arc length is larger than one third of the circumference of the housing and smaller than two thirds of the circumference of the housing.

As a preferable scheme, the casing is made of aluminum alloy or zinc alloy or stainless steel.

As a preferable scheme, a first glue hiding groove is arranged on the inner side wall of the first bearing chamber and/or the outer side surface of the first bearing;

or the inner side wall of the second bearing chamber and/or the outer side surface of the second bearing are/is provided with a first glue hiding groove.

As a preferable scheme, the first glue hiding groove is an annular groove.

As a preferred scheme, a second glue hiding groove is formed in the position, corresponding to the bearing installation position, of the rotating shaft.

Preferably, the lower end surface of the inner ring of the air duct is located behind the lower end surface of the outer ring, and the air duct is configured such that: an accommodating position for accommodating fan blades is formed between the lower end face of the inner ring and the lower end face of the outer ring; the lower end of the rotating shaft is provided with a fan blade, and the fan blade is located in the accommodating position.

As a preferred scheme, the fan blade is a hardware or plastic part.

As a preferable scheme, the guide plate is in a curved shape with a certain slope; and, the inclination of guide plate is from the setting up that diminishes from down to top.

Compared with the prior art, the invention has obvious advantages and beneficial effects, particularly:

1. the two ends of the rotating shaft are respectively provided with the first bearing and the second bearing, and compared with a cantilever beam type structure of the existing motor, the swing amplitude of the rotor assembly is smaller and the sound is small; moreover, the motor of the application can ensure the motion stability of the rotor component under the condition that the length of the armature is lengthened to increase the power density of the motor (increase the working air quantity of the motor).

2. In the process of machining the shell, a first bearing chamber and a second bearing chamber are formed, and compared with the prior art, the two bearing chambers are formed by one-time clamping and machining of a precision machine tool, so that the straightness of the first bearing and the second bearing during subsequent assembly can be guaranteed, the first bearing and the second bearing are more uniformly stressed when the motor works, the noise of the motor is reduced, and the service life of the motor is prolonged.

3. During the assembly, put into circular logical intracavity with whole armature module, through glue reinforcement or through the interference pressfitting, compare prior art, reduced and need with assembly steps such as screw lock solid, assembly efficiency is higher.

4. Compared with the prior art, the structure of the air duct is simpler, the existing air duct is designed after being demoulded and needs to be clamped and processed for 2 times, and the air duct of the application only needs to be clamped, processed and fixed for 1 time after being demoulded; the method has the advantages of reducing the step of one-time clamping, improving the production efficiency, and ensuring the product precision and the product consistency by one-time clamping processing.

5. The elastic piece is arranged between the first bearing and the magnetic ring, so that the mechanical noise caused by the bearing clearance of the motor can be effectively reduced, and the use experience of the motor (the blowing cylinder) is improved.

To more clearly illustrate the structural features and effects of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

Drawings

FIG. 1 is a perspective view of an embodiment of the present invention;

FIG. 2 is a perspective view of another embodiment of the present invention;

FIG. 3 is a first exploded view of the embodiment of the present invention;

FIG. 4 is a second exploded view of the embodiment of the present invention;

FIG. 5 is a schematic cross-sectional view of an embodiment of the present invention;

FIG. 6 is a perspective view of an armature module according to an embodiment of the present invention;

FIG. 7 is a perspective view of a housing according to an embodiment of the present invention;

FIG. 8 is a perspective view of an embodiment of the air duct of the present invention;

fig. 9 is a schematic cross-sectional view of a housing according to an embodiment of the invention.

The attached drawings indicate the following:

10. an air duct; 11. an inner ring; 111. a circular through cavity; 12. an outer ring; 13. a ventilation cavity; 131. a baffle; 14. accommodating positions; 20. an armature module; 21. a housing; 211. a mounting cavity; 212. a notch; 213. a first bearing chamber; 2131. a first glue hiding groove; 214. a second bearing chamber; 215. a wire passing hole; 22. a stator assembly; 23. a rotor assembly; 231. a rotating shaft; 2311. a second glue hiding groove; 232. a magnetic ring; 233. a first bearing; 234. a second bearing; 235. an elastic member; 236. a first bushing; 237. a second shaft sleeve; 24. a PCB board; 25. a fan blade.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are only preferred embodiments of the present invention.

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 and do not represent the only embodiments.

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 herein in the description of the invention 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.

Referring to fig. 1 to 9, a split type motor according to an embodiment of the present invention includes an air duct 10 and an armature module 20; the armature module 20 comprises a machine shell 21, and a stator assembly 22, a rotor assembly 23 and a PCB 24 which are arranged in the machine shell 21; the housing 21 is cylindrical and has an installation cavity 211 inside, and a notch 212 communicated with the installation cavity 211 is arranged on the housing 21; wherein:

the rotor assembly 23 includes a rotating shaft 231, a magnetic ring 232 disposed on the rotating shaft 231, a first bearing 233 disposed at an upper end of the rotating shaft 231, and a second bearing 234 disposed at a lower end of the rotating shaft 231; correspondingly, the housing 21 has a first bearing chamber 213 adapted to the first bearing 233, and a second bearing chamber 214 adapted to the second bearing 234; the first bearing chamber 213 is convexly arranged at the upper end of the machine shell 21, and the second bearing chamber 214 is convexly arranged at the lower end of the machine shell 21; an elastic piece 235 is arranged between the first bearing 233 and the magnetic ring 232;

the air duct 10 comprises an inner ring 11 and an outer ring 12 which are concentrically arranged; the inner ring 11 is formed with a circular through cavity 111 matched with the shell 21; a ventilation cavity 13 is formed between the inner ring 11 and the outer ring 12, and a plurality of guide plates 131 are arranged in the ventilation cavity 13.

During assembly, the stator assembly 22 and the PCB board 24 are put into the installation cavity 211 of the machine casing 21 from the gap 212 of the machine casing 21, and the rotor assembly 23 penetrates into the machine casing 21 from the second bearing chamber 214 at the lower end of the machine casing 21; therefore, the armature module 20 is formed, the whole armature module 20 is placed in the circular through cavity of the air duct 10, and glue can be coated on the contact surface of the casing 21 and the circular through cavity 111, so that the connection between the armature module 20 and the air duct 10 is more stable. The mode that interference fit or interference fit and skin glue combine together also can be adopted alone, further improve and connect the steadiness.

Further, the PCB board 24 is disposed at an upper end of the magnetic ring 232, and the housing 21 is disposed with a corresponding wire passing hole 215. Preferably, the wire through hole 215 is disposed at the upper end surface of the housing 21 and is located at the edge, thereby facilitating the machine tool. What needs to be supplemented is that: in this embodiment, since the wiring manner of the PCB 24 is a lead type, a corresponding wire passing hole is disposed on the casing 21; in other embodiments, the PCB 24 may be connected through a terminal, and the PCB 24 welded with the terminal seat is exposed outside the casing 21, and then the PCB 24 is welded and fixed to the stator assembly 22 through the pin.

Meanwhile, as shown in fig. 9, the notch 212 of the housing 21 is arc-shaped, and the arc length is greater than one third of the circumference of the housing 21 and less than two thirds of the circumference of the housing 21; in practical applications, the arc length of the gap 212 is preferably equal to one-half of the circumference of the housing 21. In this manner, the stator assembly 22 and the like can be easily installed into the casing 21.

It should be noted that the motor of the present application is primarily, but not exclusively, applicable to hair dryer products; this application has following advantage through improving the motor for split type design:

1. the first bearing 233 and the second bearing 234 are respectively arranged at two ends of the rotating shaft 231, and compared with a cantilever beam type structure (such as CN 217335308U and CN 21369632; two or 1 bearings are arranged at one side of the rotating shaft 231) of the existing motor, the swing amplitude of the rotor assembly 23 is smaller and the sound is smaller; moreover, the motor of the present application can also ensure the motion stability of the rotor assembly 23 under the condition that the length of the armature is lengthened to increase the power density of the motor (increase the air volume of the motor).

2. Casing 21 is the hardware (preferred aluminum alloy, certainly, also can be zinc alloy or stainless steel), and it is once the clamping and to its processing formation through the precision machine tool, in casing 21 course of working, is formed with first bearing room 213, second bearing room 214, and compared with prior art (such as CN 217590465U), two bearing rooms are once the clamping processing formation through the precision machine tool, can guarantee the straightness accuracy of first bearing 233 with second bearing 234 during subsequent assembly, make the atress of first bearing 233 with second bearing 234 when the motor is worked more even, be favorable to reducing motor noise more, prolong motor life-span.

What is needed is: through the split design, the concentricity of the two bearing chambers (holes) is smaller and can reach 0.001 mm-level concentricity, while the concentricity of the two bearing chambers can only reach 0.01 mm-level by respectively arranging the 2 bearing chambers in the air duct 10 and the rear cover in the traditional mode; therefore, the working stability of the motor is further improved, and the working noise is reduced.

3. During assembly, the whole armature module 20 is placed in the circular through cavity 111, and is reinforced by glue or pressed in by micro interference, compared with the prior art (such as CN 217590465U), the assembling steps of locking and fixing by screws and the like are reduced, and the assembling efficiency is higher.

4. Compared with the prior art, the structure of the air duct 10 is simpler, the existing air duct 10 design (such as CN 217335308U and CN 217590465U) needs to be processed on a machine tool after being demoulded, and the specific processing steps are as follows: firstly, clamping and fixing one end (upper end) of an air duct 10, and processing the air duct 10; after the processing is completed, the air duct 10 is taken out, the other end (lower end) of the air duct 10 is clamped and fixed, and one end face (upper end face) of the air duct 10 is processed.

After the air duct 10 is demoulded, only the upper end of the air duct 10 needs to be clamped and fixed, and then the air duct 10 is processed; and after the processing is finished, taking out the workpiece, namely finishing the processing. The method has the advantages of reducing the step of one-time clamping, improving the production efficiency, and ensuring the product precision and the product consistency by one-time clamping processing.

It should be noted that: the duct 10 of the present application is typically hardware (i.e., made of a metallic material such as zinc); however, when the requirement on the structural strength of the air duct 10 is not high, the air duct 10 of the present application may also be made of plastic, thereby further reducing the production cost; the split design of the application also provides a new idea for controlling the production cost for manufacturers.

5. The elastic piece 235 is arranged between the first bearing 233 and the magnetic ring 232, so that mechanical noise caused by bearing play of the motor can be effectively reduced, and the use experience of the motor (the air blowing cylinder) is improved. Specifically, the elastic member 235 is typically a spring. Generally, the rotating shaft 231 is provided with a first shaft sleeve 236 and a second shaft sleeve 237 at the upper end and the lower end of the magnetic ring 232, respectively, and the spring (elastic member 235) is disposed between the first bearing 233 and the first shaft sleeve 236.

Preferably, the inner side wall of the first bearing chamber 213 and/or the outer side surface of the first bearing 233 are/is provided with a first glue hiding groove 2131; likewise, the inner sidewall of the second bearing chamber 214 and/or the outer sidewall of the second bearing 234 are preferably provided with a first gel recess 2131. Glue is accommodated by the first glue storing groove 2131, so that the bonding force between the bearing and the bearing chamber is further improved, the connection between the bearing and the bearing chamber is firmer, the work is more stable, and the noise is lower. Specifically, the first Tibetan glue groove 2131 may be an annular groove. Typically, the annular groove has a groove depth of 0.02 to 0.10 mm; in addition, the first glue storing recess 2131 may be provided in the number of 1-3 on the inner side wall of the first bearing chamber 213 and the inner side wall of the second bearing chamber 214.

Preferably, the rotating shaft 231 corresponding to the bearing installation position may also be provided with a second glue hiding groove 2311, and the second glue hiding groove 2311 is provided for accommodating glue, so that the assembling stability of the rotating shaft 231 and the bearing is further improved. Generally, the second gel recess 2311 is generally an annular recess, and the groove depth of the second gel recess 2311 is generally 0.02 to 0.10 mm; specifically, the second glue hiding groove 2311 may be provided with 1-2 corresponding to the first bearing 233 on the rotating shaft 231 and 1-2 corresponding to the second bearing 234 on the rotating shaft 231. Of course, the second glue storing groove 2311 may be a knurled tooth socket.

Further, the lower end surface of the inner ring 11 of the air duct 10 is located behind the lower end surface of the outer ring 12, and such that: a containing position 14 for containing a fan blade 25 is formed between the lower end surface of the inner ring 11 and the lower end surface of the outer ring 12; the lower end of the rotating shaft 231 is provided with a fan blade 25, and the fan blade 25 is located at the accommodating position 14. Preferably, the fan blade 25 is a hardware; specifically, the fan blades 25 are preferably made of magnesium aluminum alloy, have the advantage of lighter weight, and the structural strength of the fan blades can meet the working requirements of the motor; the fan blades 25 are provided with 13 blades; of course, the fan blade 25 may also be a conventional aluminum alloy or plastic member.

What needs to be supplemented is that: the baffle 131 is vertically arranged, and the baffle 131 is curved with a certain slope; specifically, the inclination angle of the guide plate 131 is set to be gradually smaller from bottom to top. In this way, the air flow can be quickly discharged by changing the deflected air flow at the front end of the air duct 10 into an axially flowing air flow. Specifically, the front end of the air duct 10 is provided with left and right fan blades 25, the air flow guided by the fan blades 25 is non-vertical in deflection direction, and the front end of the guide plate 131 is correspondingly arranged, and the rear side is linearly arranged, so that the air flow is guided to flow axially and is rapidly discharged.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the technical scope of the present invention, so that any minor modifications, equivalent changes and modifications made to the above embodiment according to the technical spirit of the present invention are within the technical scope of the present invention.

Claims

1. A split type motor is characterized in that: comprises an air duct and an armature module; the armature module comprises a machine shell, and a stator assembly, a rotor assembly and a PCB which are arranged in the machine shell; the shell is cylindrical, and an installation cavity is formed in the shell, and a gap communicated with the installation cavity is formed in the shell; wherein:

the rotor assembly comprises a rotating shaft, a magnetic ring arranged on the rotating shaft, a first bearing arranged at the upper end of the rotating shaft and a second bearing arranged at the lower end of the rotating shaft; correspondingly, a first bearing chamber matched with the first bearing and a second bearing chamber matched with the second bearing are arranged on the shell; an elastic piece is arranged between the first bearing and the magnetic ring;

2. The split type motor according to claim 1, wherein: the first bearing chamber is convexly arranged at the upper end of the shell, and the second bearing chamber is convexly arranged at the lower end of the shell.

3. The split type motor according to claim 2, wherein: the gap of the casing is arc-shaped, and the arc length of the gap is greater than one third of the circumference of the casing and less than two thirds of the circumference of the casing.

4. A split electric machine according to any one of claims 1 to 3, wherein: the casing is made of aluminum alloy or zinc alloy or stainless steel.

5. The split type motor according to claim 4, wherein: a first glue hiding groove is formed in the inner side wall of the first bearing chamber and/or the outer side surface of the first bearing;

6. The split type motor according to claim 5, wherein: the first glue hiding groove is an annular groove.

7. The split type motor according to claim 4, wherein: and a second glue hiding groove is formed in the position, corresponding to the bearing, of the rotating shaft.

8. The split type motor according to claim 4, wherein: the lower end face of the inner ring of the air duct is positioned behind the lower end face of the outer ring, and the air duct is characterized in that: a containing position for containing the fan blade is formed between the lower end surface of the inner ring and the lower end surface of the outer ring; the lower end of the rotating shaft is provided with a fan blade, and the fan blade is located in the accommodating position.

9. The split type motor according to claim 8, wherein: the fan blades are made of hardware or plastic parts.

10. The split type motor according to claim 9, wherein: the guide plate is in a curved shape with a certain slope; and, the inclination of guide plate is from the setting up that diminishes from down to top.