JP7292769B1 - split motor - Google Patents

Abstract

An object of the present invention is to improve the stability of a rotor during rotation, reduce vibration, and reduce noise. A split type motor includes an air duct (10) and an armature module, the armature module including a housing (21), a stator assembly (22), a rotor assembly and a PCB board (24) mounted in the housing, the housing 21 has a mounting cavity inside, a notch communicating with the mounting cavity is provided, and a rotor assembly is provided with a rotating shaft 231, a magnetic ring 232 provided on the rotating shaft 231, and an upper end of the rotating shaft 231. A first bearing 233 and a second bearing 234 provided at the lower end of the rotating shaft 231 are included. A chamber and an elastic member 235 are provided between the first bearing 233 and the magnetic ring 232, and the air duct 10 includes an inner ring 11 and an outer ring 12 which are concentrically provided. [Selection drawing] Fig. 5

Description

FIELD OF THE INVENTION The present invention relates to the field of motors, and in particular to split motors, which are mainly, but not exclusively, applied to hair dryers.

A motor is one of the essential parts of a hair dryer, and the power and quality of the motor are directly related to the hair dryer's service life and experience. 2. Description of the Related Art Various motors are available on the market in order to reduce noise generated during operation of a hair dryer motor, increase the air intake of the hair dryer, extend the service life of the motor, and the like.

In order to improve the stability of the rotor during rotation, reduce vibration, and reduce noise, such as the publication number CN217335308U disclosing a motor for a hair dryer, the patent discloses that the rotating shaft of the rotor assembly has a A bearing is provided and two bearings are provided on one side of the magnetic ring. Vibration can be reduced to some extent, but drawbacks still exist. Firstly, the armature length of this motor structure cannot be designed to be too long, otherwise when the motor rotates at high speed, its vibration will be more pronounced and the noise will be louder. . Therefore, this motor also has a low power density and is not suitable for rotating at higher speeds. In addition, the air duct used in this motor needs to be clamped and processed twice in a machine tool after it is manufactured and released from the mold, which reduces production efficiency.

There are motors of other constructions. Like the Chinese patent with publication number CN217590465U, which discloses a motor for a hair dryer, this patent provides bearings at both ends of the rotation axis of the rotor assembly, thus improving stability. However, this technique also has some drawbacks. Since one bearing chamber is provided in the air duct and the other bearing chamber is provided in the rear cover, the straightness of the two bearing chambers is poor, and when the rotor assembly rotates, the forces received by the two bearings do not match. No, it still makes a lot of noise. Also, during assembly, the rear cover is locked to the air passage with screws, which is troublesome during assembly.

Therefore, it is necessary to consider new technical means to solve the above problems.

In order to solve the drawbacks and inadequacies of the prior art, according to the present invention, by designing a split type fan, the convenience of assembling the fan is improved, and the specific design of the fan reduces noise. A split motor is provided that has the advantage of low and stable operation.

In order to achieve the above object, according to the present invention,
A wind duct and armature module, wherein the armature module includes a housing, a stator assembly, a rotor assembly and a PCB board mounted in the housing, the housing being cylindrical with a mounting cavity therein. and the housing is provided with a notch communicating with the mounting cavity,
The rotor assembly includes a rotating shaft, a magnetic ring provided on the rotating shaft, a first bearing provided on the upper end of the rotating shaft, and a second bearing provided on the lower end of the rotating shaft, correspondingly , the housing has a first bearing chamber adapted to a first bearing and a second bearing chamber adapted to a second bearing, and an elastic member is provided between the first bearing and the magnetic ring. provided,
The air channel includes an inner ring and an outer ring arranged concentrically, the inner ring surrounding the housing so as to form a circular through-cavity that fits therein, and between the inner ring and the outer ring: , the technical means of split motor is adopted, in which a ventilation cavity is formed with a plurality of deflectors.

As a preferred embodiment, the first bearing chamber protrudes from the upper end of the housing, and the second bearing protrudes from the lower end of the housing.

As a preferred embodiment, the notch of the housing has an arc shape with an arc length greater than one-third of the circumference of the housing and smaller than two-thirds of the circumference of the housing.

Preferably, the housing is made of aluminum alloy, zinc alloy or stainless steel.

As a preferred embodiment, the inner wall of the first bearing chamber and/or the outer surface of the first bearing is provided with a first adhesive storage concave groove,
Alternatively, the inner wall of the second bearing chamber and/or the outer surface of the second bearing are provided with a first adhesive storage groove.

Preferably, the first adhesive storage groove is a ring-shaped groove.

Preferably, the rotary shaft is provided with a second adhesive storage groove at a location corresponding to the mounting of the bearing.

As a preferred embodiment, the lower end surface of the inner ring of the air duct is arranged such that an accommodation position for accommodating the fan blades is formed between the lower end surface of the inner ring and the lower end surface of the outer ring. A fan blade positioned at the accommodation position is provided at the lower end of the rotating shaft, which is positioned on the rear surface of the lower end surface of the rotor.

As a preferred embodiment, the fan blades are metal members or plastic members.

Preferably, the deflector has a curved shape with a constant inclination, and the inclination angle of the deflector is gradually decreased from bottom to top.

The present invention has obvious advantages and beneficial effects compared with the prior art, specifically:
1. A first bearing and a second bearing are provided at both ends of the rotating shaft, respectively. The motor of the present application can also ensure the stability of the motion of the rotor assembly even when the armature length is increased to increase the power density of the motor (increase the airflow of the motor operation).

2. In the housing processing process, the first bearing chamber and the second bearing chamber are formed. In contrast to the prior art, the two bearing chambers are formed by one-time clamping and processing by precision machine tools, and are assembled later. The straightness of the first bearing and the second bearing can be guaranteed, and the force received by the first bearing and the second bearing during motor operation becomes more uniform, which is advantageous in reducing motor noise and extending the life of the motor.

3. During assembly, the entire armature module is placed in a circular through cavity, and then reinforced with adhesive or through interference press-fitting. reduced, resulting in higher assembly efficiency.

4. The structure of the air duct is simpler than that of the prior art. The conventional air duct is designed to be clamped and processed twice after demolding, but the air duct of the present application is Only one clamping and machining fixation is required after demolding. It also has the advantage that one clamping step is reduced, the production efficiency is improved, and one clamping and processing guarantees product precision and product consistency.

5. An elastic member is provided between the first bearing and the magnetic ring, which can effectively reduce the mechanical noise caused by the bearing play of the motor and improve the experience of using the motor (hair dryer).

In order to describe the structural features and advantages of the present invention more clearly, the present invention will now be described in detail in conjunction with the drawings and specific embodiments.

1 is a schematic perspective view of an embodiment of the present invention; FIG. FIG. 3 is another angular perspective schematic view of an embodiment of the present invention; 1 is a first exploded schematic view of an embodiment of the present invention; FIG. FIG. 4 is a second schematic exploded view of an embodiment of the present invention; 1 is a schematic cross-sectional view of an embodiment of the invention; FIG. 1 is a schematic perspective view of an armature module in an embodiment of the present invention; FIG. 1 is a schematic perspective view of a housing according to an embodiment of the invention; FIG. 1 is a schematic perspective view of an air duct according to an embodiment of the present invention; FIG. 1 is a schematic cross-sectional view of a housing in an embodiment of the invention; FIG.

The following clearly and completely describes the technical means in the present embodiments of the present invention in conjunction with the drawings, and obviously the described embodiments are only preferred embodiments of the present invention.

Note that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may be intermediate components. Where a component is considered to be "connected" to another component, it may be directly connected to the other component, or there may be intermediate components simultaneously. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for the purpose of description 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 in the specification 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.

1 to 9, the split type motor in the embodiment of the present invention includes air duct 10 and armature module 20. As shown in FIG. Armature module 20 includes a housing 21 , a stator assembly 22 , a rotor assembly 23 and a PCB board 24 mounted within housing 21 . The housing 21 is cylindrical having a mounting cavity 211 therein, and the housing 21 is provided with a notch 212 communicating with the mounting cavity 211 .

The rotor assembly 23 includes a rotating shaft 231, a magnetic ring 232 installed on the rotating shaft 231, a first bearing 233 installed on the upper end of the rotating shaft 231, a second bearing 234 installed on the lower end of the rotating shaft 231, including. Correspondingly, the housing 21 has a first bearing chamber 213 that fits the first bearing 233 and a second bearing chamber 214 that fits the second bearing 234 . The first bearing chamber 213 protrudes from the upper end of the housing 21 , and the second bearing 234 protrudes from the lower end of the housing 21 . An elastic member 235 is installed 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 surrounds such that a circular through cavity 111 is formed which fits into the housing 21 . Between the inner ring 11 and the outer ring 12, a ventilation cavity 13 is formed in which a plurality of deflectors 131 are provided.

At the time of assembly, the stator assembly 22 and the PCB board 24 are placed in the mounting cavity 211 of the housing 21 through the cutout 212 of the housing 21, and the rotor assembly 23 is passed through the second bearing chamber 214 at the lower end of the housing 21 and mounted on the housing 21. The armature module 20 is thus formed, and then the entire armature module 20 is placed in the circular through-hole cavity of the air duct 10, and the contact surface with the circular through-hole cavity 111 of the housing 21 has the armature module Adhesive can be applied to make the connection between both 20 and air duct 10 stronger. An interference fit alone or a combination of interference fit and adhesive application can further improve the stability of the connection.

Furthermore, the PCB board 24 is provided on the upper end of the magnetic ring 232 and the housing 21 is formed with corresponding wire-through holes 215 . In order to facilitate machining, the wire through hole 215 is preferably provided on the top surface of the housing 21 so as to be positioned at the edge. In this embodiment, since the wiring system of the PCB board 24 adopts the lead wire system, the housing 21 is formed with a corresponding wiring hole. In another embodiment, the wiring scheme of the PCB board 24 may be one that conducts through terminals. It is only necessary to expose the PCB board 24 to which the terminal block is welded to the outside of the housing 21 and then fix the PCB board 24 to the stator assembly 22 by welding through pins.

On the other hand, as shown in FIG. 9, the notch 212 of the housing 21 has an arc length greater than one-third of the circumferential length of the housing 21 and less than two-thirds of the circumferential length of the housing 21. arc-shaped. In practical application, the arc length of the notch 212 is preferably equal to half the circumferential length of the housing 21 . This allows convenient attachment of components such as the stator assembly 22 to the housing 21 .

Although the motor of the present application is mainly applied to hair dryer products, it is not limited to this. By improving the motor to a split design, the present application has the following advantages.

1. A first bearing 233 and a second bearing 234 are installed at both ends of the rotating shaft 231, respectively. Conventional motor cantilever arm structures (for example, CN217335308U, CN21369626) have two or one bearing on the rotating shaft 231. ), the swing width of the rotor assembly 23 is small and the noise is small. In addition, the motor of the present application can ensure the stability of the movement of the rotor assembly 23 even when the length of the armature is increased to increase the power density of the motor (increase the airflow of the motor operation). .

2. The housing 21 is a metal member (preferably aluminum alloy, of course, it can be zinc alloy or stainless steel), which is formed by one-time clamping and processing by precision machine tools, and in the processing process of the housing 21 , a first bearing chamber 213 and a second bearing chamber 214 are formed, and in contrast to the prior art (such as CN217590465U), the two bearing chambers are formed by one-time clamping and processing by a precision machine tool, and can be assembled later. The straightness of the first bearing 233 and the second bearing 234 can be guaranteed, and the force received by the first bearing 233 and the second bearing 234 during motor operation becomes more uniform, which is advantageous in reducing motor noise and extending the life of the motor. .

In addition, due to the split design, the concentricity of the two bearing chambers (holes) becomes smaller and can reach the level of 0.001 mm. In this method, the concentricity of the two bearing chambers can only reach the level of 0.01 mm. This further improves the operational stability of the motor and reduces the operational noise.

3. When assembling, the whole armature module 20 is placed in a circular through-cavity, and then through adhesive reinforcement, or through slight interference press-fitting, against the prior art (such as CN217590465U), screw locking, etc. The number of assembly steps required is reduced, resulting in higher assembly efficiency.

4. The structure of the air duct 10 is simpler than that of the prior art, and the conventional air duct 10 (eg CN217335308U, CN217590465U) is designed so that it needs to undergo processing in a machine tool after demolding. The specific processing steps are: first, clamp one end (upper end) of the air duct 10 to process the air duct 10; after the processing is completed, remove the air duct 10; is clamped and one end surface (upper end surface) of the air duct 10 is processed.

The air duct 10 of the present application can be completed by clamping only the upper end of the air duct 10 after releasing the mold, processing the air duct 10, and removing the air duct 10 after the processing is completed. It also has the advantage that one clamping step is reduced, the production efficiency is improved, and one clamping and processing guarantees product precision and product consistency.

In addition, the air duct 10 of the present application is normally a metal member (that is, made of a metal material such as zinc). However, if the requirements for the structural strength of the air duct 10 are not high, the air duct 10 of the present application can be made of plastic, which further reduces the production cost. New ideas for controlling costs are provided.

5. An elastic member 235 is provided between the first bearing 233 and the magnetic ring 232, which can effectively reduce the mechanical noise caused by the bearing play of the motor, and improve the experience of using the motor (hair dryer). . Specifically, the elastic member 235 is typically a spring. Generally, the rotating shaft 231 is provided with a first sleeve 236 and a second sleeve 237 corresponding to the upper and lower ends of the magnetic ring 232, and the spring (elastic member 235) is connected to the first bearing 233 and the first sleeve. 236.

It is preferable that the inner wall of the first bearing chamber 213 and/or the outer surface of the first bearing 233 is provided with a first adhesive storage groove 2131 . Similarly, the inner wall of the second bearing chamber 214 and/or the outer surface of the second bearing 234 are preferably provided with a first adhesive storage groove 2131 . By providing the first adhesive storage groove 2131 to accommodate the adhesive, the adhesive force between the bearing and the bearing chamber is further improved, so that the connection between the bearing and the bearing chamber is stronger and the operation is more efficient. Stable and less noisy. Specifically, the first adhesive storage groove 2131 may be a ring-shaped groove. The groove depth of the ring-shaped concave groove is usually 0.02 to 0.10 mm. Also, one to three first adhesive storage grooves 2131 may be provided on the inner wall of the first bearing chamber 213 and the inner wall of the second bearing chamber 214 .

Preferably, the rotating shaft 231 may be provided with a second adhesive storage groove 2311 at a location corresponding to the mounting of the bearing. As a result, the assembly stability between the rotating shaft 231 and the bearing is further improved. The second adhesive storage groove 2311 is generally a ring-shaped groove, and the groove depth of the second adhesive storage groove 2311 is generally 0.02-0.10 mm. Specifically, one or two second adhesive storage grooves 2311 may be provided at a location corresponding to the first bearing 233 of the rotating shaft 231, and correspond to the second bearing 234 of the rotating shaft 231. One or two may be provided at a location. Of course, the second adhesive storage grooves 2311 may be knurled grooves.

Further, the lower end surface of the inner ring 11 of the air duct 10 is formed such that a housing position 14 for housing the fan blades 25 is formed between the lower end surface of the inner ring 11 and the lower end surface of the outer ring 12 . Further, fan blades 25 positioned at the housing position 14 are provided at the rear surface of the lower end surface of the outer ring 12 and at the lower end of the rotating shaft 231 . The fan blades 25 are preferably metal fittings. Specifically, the fan blades 25 are preferably made of magnesium-aluminum alloy, which has the advantages of lighter mass and structural strength that can meet the operating requirements of the motor. The fan blades 25 have 13 blades. Of course, fan blades 25 may be conventional aluminum alloy or plastic members.

The deflector 131 is arranged vertically, and the deflector 131 has a curved shape with a constant inclination. Specifically, the inclination angle of the deflector 131 gradually decreases from bottom to top. be provided. In this manner, by making the deflected airflow at the tip of the air duct 10 an airflow flowing in the axial direction, the airflow can be quickly discharged. Specifically, the left and right fan blades 25 are provided at the tip of the air duct 10, the airflow introduced by the fan blades 25 is non-perpendicular in the deflection direction, and the tip of the deflector 131 is provided accordingly, and the rear Since the side is provided in a straight line, the airflow is guided to flow in the axial direction and discharged quickly.

The above are only preferred embodiments of the present invention, and there is no limitation to the technical scope of the present invention. and modifications are still within the scope of the technical means of the present invention.

10, air duct 11, inner ring 111, circular through cavity 12, outer ring 13, ventilation cavity 131, deflector 14, accommodation position 20, armature module 21, housing 211, mounting cavity 212, notch 213, first bearing chamber 2131, first adhesive storage groove 214, second bearing chamber 215, wire through hole 22, stator assembly 23, rotor assembly 231, rotating shaft 2311, second adhesive storage groove 232, magnetic ring 233, first bearing 234, second bearing 235, elastic member 236, first sleeve 237, second sleeve 24, PCB board 25, fan blade

Claims (10)

an air duct and armature module, the armature module including a housing, a stator assembly, a rotor assembly and a PCB board mounted within the housing ;
The rotor assembly includes a rotating shaft, a magnetic ring provided on the rotating shaft, a first bearing provided on the upper end of the rotating shaft, and a second bearing provided on the lower end of the rotating shaft ;
The housing includes a first bearing seat having a first bearing chamber for accommodating the first bearing, a second bearing seat having a second bearing chamber for accommodating the second bearing, and the first bearing. a housing body connecting the seat and the second bearing seat and having a mounting cavity formed on the inner peripheral side; and a cut formed in the housing body so as to communicate the mounting cavity and the outer peripheral side of the housing body. lacking and
The first bearing seat, the second bearing seat and the housing body are integrally formed,
the stator assembly, the rotor assembly and the PCB board are mounted in the mounting cavity through the cutout;
An elastic member is provided between the first bearing and the magnetic ring,
The air duct includes an inner ring and an outer ring that are concentrically arranged,
said inner ring is formed with a circular through cavity for receiving said housing;
Between the inner ring and the outer ring a ventilation cavity is formed in which a plurality of deflectors are provided.
A divided motor characterized by: The first bearing seat protrudes from the upper end of the housing, and the second bearing protrudes from the lower end of the housing.
2. The split type motor according to claim 1, wherein: The notch of the housing has an arc shape with an arc length greater than one-third of the circumference of the housing and smaller than two-thirds of the circumference of the housing.
3. The split type motor according to claim 2, characterized in that: The housing is made of aluminum alloy or zinc alloy or stainless steel,
The split type motor according to any one of claims 1 to 3, characterized in that: a first adhesive storage groove is provided on the inner wall of the first bearing seat and/or the outer surface of the first bearing;
Alternatively, the inner wall of the second bearing seat and/or the outer surface of the second bearing is provided with a first adhesive storage groove,
5. The split type motor according to claim 4, characterized in that: the first adhesive storage groove is a ring-shaped groove,
6. The split type motor according to claim 5, characterized in that: The rotary shaft is provided with a second adhesive storage groove at a location corresponding to the mounting of the bearing.
5. The split type motor according to claim 4, characterized in that: The lower end surface of the inner ring of the air duct is positioned on the lower end surface of the outer ring so that a housing position for housing the fan blades is formed between the lower end surface of the inner ring and the lower end surface of the outer ring. A fan blade positioned at the housing position is provided at the rear surface and at the lower end of the rotating shaft,
5. The split type motor according to claim 4, characterized in that: The fan blade is a metal member or a plastic member,
9. The split type motor according to claim 8, characterized in that: The deflector has a curved shape with a constant inclination, and the inclination angle of the deflector is gradually decreased from the bottom to the top.
10. The split type motor according to claim 9, characterized in that:

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