CN115765268A - Split type motor - Google Patents

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

A split motor

technical field

The invention relates to the field of motors, in particular to a split motor, which is mainly but not limited to be used in hair dryers.

Background technique

The motor is one of the essential components of the hair dryer. The power and quality of the motor are directly related to the service life and user experience of the hair dryer. In order to reduce the noise generated by the hair dryer motor, increase the air intake of the hair dryer, and prolong the service life of the motor, various motors have appeared on the market.

For example, the Chinese patent whose notification number is CN217335308 U discloses a motor for a hair dryer. In order to improve the stability of the rotor during rotation, reduce vibration and reduce noise, in this patented technology, the rotating shaft of the rotor assembly is provided with Bearings, and two bearings are set on one side of the magnetic ring; although it can reduce vibration to a certain extent, it still has shortcomings; one is that the armature length of this motor structure cannot be designed too long, When it is too long, when the motor rotates at high speed, its vibration will become more obvious and the noise will be larger; therefore, the power density of this motor is also small, which is not suitable for higher speed rotation. Moreover, the air duct used by this motor needs to be clamped and processed twice on the machine tool after the mold is manufactured, which reduces the production efficiency;

There are also motors of other structures, such as the Chinese patent whose notification number is CN217590465 U, which discloses a motor for a hair dryer. In this patent, bearings are arranged at both ends of the rotating shaft of the rotor assembly, thereby improving stability; However, this technology also has some disadvantages: since one bearing chamber is arranged in the air duct and the other bearing chamber is arranged on the back cover, the straightness of the two bearing chambers is poor, and the rotor assembly rotates. The force of the two bearings is not consistent, and there will still be a lot of noise; moreover, when assembling, the back cover is locked to the air duct by screws, and the assembly is also troublesome.

Therefore, it is necessary to study a new technical solution to solve the above problems.

Contents of the invention

In order to solve the defects and deficiencies of the above-mentioned prior art, the present invention provides a split motor, which improves the assembly convenience of the motor by designing a split motor, and, through the specific design of the motor, makes its It has the advantages of low noise and stable operation.

To achieve the above object, the present invention adopts the following technical solutions:

A split motor, including an air duct and an armature module; the armature module includes a casing, a stator assembly, a rotor assembly, and a PCB board installed in the casing; the casing has a mounting cavity inside Cylindrical shape, and the casing is provided with a gap communicating with the installation cavity; wherein:

The rotor assembly includes 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, the casing has a a first bearing chamber, a second bearing chamber adapted to the second bearing; and, an elastic member is arranged between the first bearing and the magnetic ring;

The air duct includes an inner ring and an outer ring arranged concentrically; the inner ring is surrounded by a circular cavity adapted to the casing; a ventilation cavity is formed between the inner ring and the outer ring, Moreover, several deflectors are arranged in the ventilation cavity.

As a preferred solution, the first bearing chamber is protruded at the upper end of the casing, and the second bearing chamber is protruded at the lower end of the casing.

As a preferred solution, the notch of the casing is arc-shaped, and the arc length is greater than one-third of the circumference of the casing, and less than two-thirds of the circumference of the casing.

As a preferred solution, the casing is made of aluminum alloy or zinc alloy or stainless steel.

As a preferred solution, the inner side wall of the first bearing chamber and/or the outer side of the first bearing are provided with a first rubber hiding groove;

Alternatively, the inner side wall of the second bearing chamber and/or the outer side of the second bearing are provided with a first rubber hiding groove.

As a preferred solution, the first rubber hiding groove is an annular groove.

As a preferred solution, the rotating shaft is provided with a second rubber hiding groove corresponding to where the bearing is installed.

As a preferred solution, the lower end surface of the inner ring of the air channel is located behind the lower end surface of the outer ring, so that: between the lower end surface of the inner ring and the lower end surface of the outer ring, a space for accommodating The accommodation position of the fan blade; the lower end of the rotating shaft is provided with a fan blade, and the fan blade is located at the accommodation position.

As a preferred solution, the fan blades are hardware or plastic parts.

As a preferred solution, the deflector is curved with a certain slope; moreover, the inclination angle of the deflector is gradually reduced from bottom to top.

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

1. The first bearing and the second bearing are respectively arranged at both ends of the rotating shaft. Compared with the cantilever arm structure of the existing motor, the swing range of the rotor assembly is smaller and the sound is quieter; moreover, the motor of the present application will When the length of the armature is increased to increase the power density of the motor (increase the air volume of the motor), it can also ensure the smooth movement of the rotor assembly.

2. During the processing of the casing, the first bearing chamber and the second bearing chamber are formed. Compared with the prior art, the two bearing chambers are formed by one-time clamping of precision machine tools, which can ensure the first bearing chamber during subsequent assembly. The straightness of the bearing and the second bearing makes the force on the first bearing and the second bearing more uniform when the motor is working, which is more conducive to reducing the noise of the motor and prolonging the life of the motor.

3. When assembling, put the entire armature module into the circular through cavity, and then reinforce it with glue or press it in with interference. Compared with the existing technology, it reduces the need for screw locking and other assembly steps. higher efficiency.

4. The structure of the air duct is simpler than the existing technology. The existing air duct design needs to be clamped twice after the mold is released, but the air duct of this application only needs to be installed once after the mold is released. The clamping process is fixed; the one-time clamping step is reduced, and the production efficiency is improved. Moreover, one-time clamping process also has the advantages of ensuring product accuracy and product consistency.

5. An elastic member 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 (hair dryer) can be improved.

In order to more clearly illustrate the structural features and functions of the present invention, the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

Description of drawings

Fig. 1 is the three-dimensional schematic diagram of the embodiment of the present invention;

Fig. 2 is a schematic perspective view of another angle of an embodiment of the present invention;

Fig. 3 is the first exploded schematic diagram of the embodiment of the present invention;

Fig. 4 is the second exploded schematic diagram 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 three-dimensional schematic diagram of an armature module in an embodiment of the present invention;

7 is a three-dimensional schematic diagram of a casing in an embodiment of the present invention;

Fig. 8 is a three-dimensional schematic diagram of an air duct in an embodiment of the present invention;

Fig. 9 is a schematic cross-sectional view of the casing in the embodiment of the present invention.

Explanation of the accompanying drawings:

10. Air duct; 11. Inner ring; 111. Circular through cavity; 12. Outer ring; 13. Ventilation cavity; 131. Deflector; 14. Capacity setting; 20. Armature module; 21. Case ; 211, installation cavity; 212, gap; 213, first bearing chamber; 2131, first hidden glue groove; 214, second bearing chamber; 215, wire hole; 22, stator assembly; 23, rotor assembly; 231 , the rotating shaft; 2311, the second hidden rubber groove; 232, the magnetic ring; 233, the first bearing; 234, the second bearing; 235, the elastic member; 236, the first bushing; 237, the second bushing; 24, PCB board; 25, wind blade.

Detailed ways

The technical solution in this embodiment of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiment is only a preferred embodiment of the present invention.

It should be noted that when an element is referred to as being “fixed” to another element, it can be directly on the other element or there can also be an intervening element. 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 similar expressions are used herein for purposes of illustration only and are not intended to represent the only embodiments.

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

Referring to accompanying drawings 1 to 9, a split motor in an embodiment of the present invention includes an air duct 10 and an armature module 20; the armature module 20 includes a casing 21 and is installed on the casing 21 The stator assembly 22, the rotor assembly 23, and the PCB board 24 inside; the casing 21 is cylindrical with an installation cavity 211 inside, and the casing 21 is provided with a gap 212 communicating with the installation cavity 211 ;in:

The rotor assembly 23 includes a rotating shaft 231, a magnetic ring 232 disposed on the rotating shaft 231, a first bearing 233 disposed on the upper end of the rotating shaft 231, and a second bearing 234 disposed on the lower end of the rotating shaft 231; correspondingly, the casing 21 There is 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 protrudes from the upper end of the casing 21, the The second bearing chamber 214 protrudes from the lower end of the casing 21; and, an elastic member 235 is disposed between the first bearing 233 and the magnetic ring 232;

The air duct 10 includes an inner ring 11 and an outer ring 12 arranged concentrically; the inner ring 11 encloses a circular cavity 111 adapted to the casing 21; the inner ring 11 and the outer ring A ventilation chamber 13 is formed between the 12, and several deflectors 131 are arranged in the ventilation chamber 13 .

When assembling, put the stator assembly 22 and the PCB board 24 into the installation cavity 211 of the casing 21 from the gap 212 of the casing 21, and insert the rotor assembly 23 from the second bearing chamber 214 at the lower end of the casing 21 into the machine. On the shell 21; thereby forming the armature module 20, the whole armature module 20 is placed in the center of the air duct 10 through the cavity, and the contact surface of the casing 21 and the circular through cavity 111 can be coated Glue, so that the connection between the two armature modules 20 and the air duct 10 is more stable. The interference fit or the combination of the interference fit and the skin-applied glue can also be used alone to further improve the connection stability.

Further, the PCB board 24 is arranged on the upper end of the magnetic ring 232 , and the casing 21 is provided with corresponding wire passing holes 215 . Preferably, the wire passing hole 215 is arranged on the upper end surface of the casing 21 and is located at the edge, so as to facilitate machining by the machine tool. It should be added that in this implementation, since the wiring mode of the PCB board 24 is a lead type, corresponding wire holes are provided on the casing 21; in other embodiments, the wiring mode of the PCB board 24 can also be through To connect the terminals, it is only necessary to expose the PCB board 24 welded with the terminal seat to the outside of the casing 21, and then the PCB board 24 is welded and fixed to the stator assembly 22 through pins.

At the same time, as shown in Figure 9, the gap 212 of the casing 21 is arc-shaped, and its arc length is greater than one-third of the circumference of the casing 21 and less than two-thirds of the circumference of the casing 21; In application, the arc length of the notch 212 is preferably equal to 1/2 of the circumference of the casing 21 . In this way, components such as the stator assembly 22 can be easily installed into the casing 21 .

It should be noted that the motor of this application is mainly but not limited to be used in hair dryer products; this application has the following advantages by improving the motor to a split design:

1. The first bearing 233 and the second bearing 234 are respectively arranged at the two ends of the rotating shaft 231. Compared with the cantilever arm structure of the existing motor (such as CN217335308 U, CN21369626; two or one bearing is arranged on the rotating shaft 231 On one side), the swing range of the rotor assembly 23 is smaller and the sound is lower; moreover, the motor of the present application can also ensure The smoothness of motion of the rotor assembly 23.

2. The casing 21 is a hardware (preferably aluminum alloy, of course, it can also be zinc alloy or stainless steel), which is clamped and processed by a precision machine tool at one time. During the processing of the casing 21, a first bearing is formed. Chamber 213 and second bearing chamber 214. Compared with the prior art (such as CN217590465 U), the two bearing chambers are formed by one-time clamping and processing of precision machine tools, which can ensure that the first bearing 233 and the second bearing 234 are connected to each other during subsequent assembly. The straightness makes the force of the first bearing 233 and the second bearing 234 more uniform when the motor is working, which is more conducive to reducing the noise of the motor and prolonging the life of the motor.

What needs to be added is: through the split design, the concentricity of the two bearing chambers (holes) is smaller and can reach a concentricity of 0.001mm, while the traditional method of setting the two bearing chambers in the air duct 10 and the rear cover respectively , the concentricity of the two bearing chambers can only reach the level of 0.01mm; thus, the working stability of the motor is further improved and the working noise is reduced.

3. When assembling, put the entire armature module 20 into the circular through cavity 111, and then reinforce it with glue or press it in with micro-interference. Compared with the existing technology (such as CN217590465 U), the need for screws is reduced Assembly steps such as locking, the assembly efficiency is higher.

4. The structure of the air duct 10 is simpler than the prior art. The existing air duct 10 designs (such as CN217335308 U, CN217590465 U) need to be processed on the machine tool after the mold is released. The specific processing steps are: first Clamp and fix one end (upper end) of the air duct 10, and process the air duct 10; after the processing is completed, take out the air duct 10, clamp and fix the other end (lower end) of the air duct 10, upper end surface) for processing.

For the air duct 10 of the present application, after the mold is released, only the upper end of the air duct 10 needs to be fixed by clamping, and then the air duct 10 is processed; The one-time clamping step is reduced, and the production efficiency is improved, and the one-time clamping process also has the advantages of ensuring product accuracy and product consistency.

It should be noted that: the air duct 10 of the present application is usually hardware (that is, made of metal materials, such as zinc); however, when the structural strength of the air duct 10 is not high, the air duct 10 of the present application can also be It is made of plastic, thereby further reducing the production cost; that is, the split design of the present application also provides a new idea for the manufacturer to control the production cost.

5. An elastic member 235 is provided between the first bearing 233 and the magnetic ring 232, so as to effectively reduce the mechanical noise caused by the bearing clearance of the motor and improve the experience of using the motor (hair dryer). Specifically, the elastic member 235 is generally a spring. Usually, the rotating shaft 231 is provided with a first bushing 236 and a second bushing 237 at the upper end and the lower end of the magnetic ring 232, and the spring (elastic member 235) is arranged on the first bearing 233 and the second bushing. Between a shaft sleeve 236 .

Preferably, the inner side wall of the first bearing chamber 213 and/or the outer side of the first bearing 233 are provided with a first glue hiding groove 2131; similarly, the inner side wall of the second bearing chamber 214 and/or the first The outer surface of the second bearing 234 is preferably provided with a first rubber hiding groove 2131 . By setting the first glue storage groove 2131 to accommodate the glue, the adhesion between the bearing and the bearing chamber is further improved, so that the connection between the bearing and the bearing chamber is stronger, the work is more stable, and the noise is lower. Specifically, the first rubber hiding groove 2131 may be an annular groove. Usually, the groove depth of the annular groove is 0.02 to 0.10 mm; and, the first rubber hiding groove 2131 can be provided with 1- 3.

Preferably, the rotating shaft 231 can also be provided with a second glue hiding groove 2311 at the place corresponding to the bearing installation, and the assembly stability of the rotating shaft 231 and the bearing can be further improved by setting the second glue hiding groove 2311 to accommodate glue. Usually, the second rubber hiding groove 2311 is generally an annular groove, and the groove depth of the second glue hiding groove 2311 is usually 0.02 to 0.10 mm; specifically, the second glue hiding groove 2311 can be 1-2 are provided on the shaft 231 corresponding to the first bearing 233 , and 1-2 are provided on the shaft 231 corresponding to the second bearing 234 . Certainly, the second rubber hiding groove 2311 may also be a knurled tooth groove.

Further speaking, the lower end surface of the inner ring 11 of the air channel 10 is located behind the lower end surface of the outer ring 12, so that: the lower end surface of the inner ring 11 and the lower end surface of the outer ring 12 form a The accommodating position 14 for accommodating the fan blade 25 ; Preferably, the fan blade 25 is a hardware piece; specifically, the fan blade 25 is preferably made of magnesium-aluminum alloy, which has the advantage of being lighter in weight, and its structural strength can also meet the working requirements of the motor; and , there are 13 blades on the fan blade 25; of course, the fan blade 25 can also be a traditional aluminum alloy or a plastic part.

What needs to be added is that: the deflector 131 is vertically arranged, and the deflector 131 is curved with a certain slope; specifically, the inclination angle of the deflector 131 is gradually increasing from bottom to top. small settings. In this way, by changing the deflected airflow at the front end of the air duct 10 into an axially flowing airflow, the airflow can flow out quickly. Specifically, left and right fan blades 25 are arranged at the front end of the air duct 10, and the airflow introduced by the fan blades 25 is non-vertical in the deflection direction, and then the front end of the deflector 131 is arranged correspondingly, and the rear side is arranged in a straight line, so as to guide the airflow For axial flow, fast discharge.

The above are only preferred embodiments of the present invention, and do not limit the technical scope of the present invention in any way, so any minor modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention are still valid. It belongs to the scope of the technical solutions of the present invention.

Claims (10)

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;

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.

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;

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.

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.

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