JP2023155876A - Split-type motor - Google Patents

Abstract

To improve stability of a rotor during rotation, reduce vibrations, and lower noise.SOLUTION: A split-type motor includes an air duct 10 and an armature module. The armature module includes a housing 21, as well as a stator assembly 22, a rotor assembly, and a PCB substrate 24 attached to the inside of the housing 21. The housing 21 has an attachment cavity in the inside, and is provided with a notch communicating with the attachment cavity. The rotor assembly includes a rotation shaft 231, a magnetic ring 232 provided for the rotation shaft 231, a first bearing 233 provided on the upper end of the rotation shaft 231, and a second bearing 234 provided on the lower end of the rotation shaft 231. The housing 21 has a first bearing chamber conforming to the first bearing 233 and a second bearing chamber conforming to the second bearing 234. An elastic member 235 is provided between the first bearing 233 and the magnetic ring 232. The air duct 10 includes an inner ring 11 and an outer ring 12 provided concentrically.SELECTED DRAWING: Figure 5

Description

TECHNICAL FIELD The present invention relates to the field of motors, and in particular to a split type motor mainly applied to, but not limited to, hair dryers.

The motor is one of the essential parts of the hair dryer, and the power and quality of the motor are directly related to the hair dryer's service life and use experience. Various types of motors are available on the market to reduce the noise generated during operation of hair dryer motors, increase the air intake volume of hair dryers, and extend the service life of the motors.

The hair dryer motor is disclosed with the publication number CN217335308U, in order to improve the stability of the rotor during rotation, reduce vibration, and reduce noise, the patent technology discloses that the rotation axis of the rotor assembly is A bearing is provided and two bearings are provided on one side of the magnetic ring. Although vibrations can be reduced to some extent, drawbacks still exist. First, the armature length of this motor structure cannot be designed to be too long, if it is too long, its vibration will be more obvious and the noise will be louder when the motor rotates at high speed . Therefore, this motor also has a low power density and is not suitable for rotation at higher speeds. Further, the air duct used in this motor needs to be clamped and processed twice using a machine tool after being manufactured and released from the mold, which reduces production efficiency.

There are also motors with other structures. As in the Chinese patent with publication number CN217590465U in which a motor for a hair dryer is disclosed, bearings are provided at both ends of the rotating shaft of the rotor assembly, thereby improving stability. However, there are also some drawbacks to this technique. Because one bearing chamber is installed in the air passage and the other bearing chamber is installed 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. However, there is still a lot of noise. Furthermore, during assembly, the rear cover is locked to the airway with screws, which is troublesome.

Therefore, new technical means need to be considered to solve the above problems.

In order to solve the above drawbacks and deficiencies of the prior art, according to the present invention, by designing a split type fan, the convenience of fan assembly is improved, and the specific design of the fan reduces noise. A split motor is provided which has the advantage of low operating stability.

In order to achieve the above object, according to the present invention,
an airway and armature module, the armature module including a housing, a stator assembly, a rotor assembly and a PCB board mounted within the housing, the housing being cylindrical with a mounting cavity therein; , and the housing is provided with a notch that communicates with the mounting cavity,
The rotor assembly includes a rotating shaft, a magnetic ring provided on the rotating shaft, a first bearing provided at an upper end of the rotating shaft, and a second bearing provided at a lower end of the rotating shaft. , the housing has a first bearing chamber that fits the first bearing, and a second bearing chamber that fits the second bearing, and an elastic member is provided between the first bearing and the magnetic ring. established,
The airway 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 into the housing, and a space between the inner ring and the outer ring. , the technical means of a split motor is adopted, in which a ventilation cavity is formed in which a plurality of deflectors are provided.

In a preferred embodiment, the first bearing chamber projects from an upper end of the housing, and the second bearing projects from a lower end of the housing.

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

In a preferred embodiment, the housing is made of aluminum alloy, zinc alloy, or stainless steel.

In a preferred embodiment, a first adhesive storage groove is provided on the inner wall of the first bearing chamber and/or the outer surface of the first bearing,
Alternatively, a first adhesive storage groove is provided on an inner wall of the second bearing chamber and/or an outer surface of the second bearing.

In a preferred embodiment, the first adhesive storage groove is a ring-shaped groove.

In a preferred embodiment, the rotating shaft is provided with a second adhesive storage groove at a location corresponding to the attachment of the bearing.

In a preferred embodiment, the lower end surface of the inner ring of the air passage is arranged such that an accommodation position for accommodating a fan blade is formed between the lower end surface of the inner ring and the lower end surface of the outer ring. A fan blade is provided at the lower end of the rotary shaft and located at the housing position.

In a preferred embodiment, the fan blade is a metal member or a plastic member.

In a preferred embodiment, the deflector has a curved shape with a constant inclination, and the inclination angle of the deflector becomes gradually smaller from the bottom to the top.

The present invention has obvious advantages and beneficial effects compared to the prior art, in particular:
1. A first bearing and a second bearing are provided at both ends of the rotating shaft, and the swing width of the rotor assembly is smaller and the noise is lower than that of a conventional motor with a cantilever arm structure. Moreover, the motor of the present application can ensure the stability of the motion of the rotor assembly even when the length of the armature is increased to increase the power density of the motor (increase the air volume of motor operation).

2. In the housing machining process, the first bearing chamber and the second bearing chamber are formed.In contrast to the conventional technology, the two bearing chambers are formed by one clamping and machining process using a precision machine tool, and during later assembly. The linearity of the first bearing and the second bearing can be guaranteed, and the forces received by the first and second bearings during motor operation become 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-hole cavity and then reinforced with adhesive or interference press-fitted, which eliminates assembly steps that require locking with screws, etc., compared to the conventional technology. reduced, resulting in higher assembly efficiency.

4. The structure of the air channel is simpler than the conventional technology, and the traditional air channel is designed so that it needs to be clamped and processed twice after demolding, but the air channel of the present application is After demolding, only one clamping and processing fixation is required. One clamping step is reduced, production efficiency is improved, and one clamping and processing also has the advantage of ensuring product precision and product consistency.

5. Since the elastic member is provided between the first bearing and the magnetic ring, the mechanical noise caused by the bearing play of the motor can be effectively reduced and the experience of using the motor (hair dryer) can be improved.

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

1 is a perspective schematic diagram of an embodiment of the invention; FIG. FIG. 3 is a perspective schematic view of another angle of an embodiment of the invention; FIG. 2 is a first exploded schematic diagram of an embodiment of the present invention. FIG. 3 is a second exploded schematic diagram of an embodiment of the present invention. 1 is a schematic cross-sectional view of an embodiment of the invention; FIG. FIG. 2 is a schematic perspective view of an armature module in an embodiment of the present invention. FIG. 3 is a schematic perspective view of a housing in an embodiment of the present invention. FIG. 2 is a schematic perspective view of an airway in an embodiment of the present invention. FIG. 3 is a schematic cross-sectional view of a housing in an embodiment of the present invention.

Hereinafter, together with the drawings, a clear and complete explanation will be given of the technical means in this embodiment of the invention, and it is clear that the described embodiment is only a preferred embodiment of the 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. When a component is considered "connected" to another component, it may be directly connected to another component, or intermediate components may be present at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for descriptive purposes only and are not meant to be 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 the invention pertains. The terminology used herein in the specification of the invention is for the purpose of describing specific embodiments only and is not intended to limit the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

Referring to FIGS. 1 to 9, a split motor according to an embodiment of the present invention includes a wind duct 10 and an 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 the housing 21. The housing 21 has a cylindrical shape with a mounting cavity 211 therein, and a notch 212 communicating with the mounting cavity 211 is provided in the housing 21 .

The rotor assembly 23 includes a rotating shaft 231, a magnetic ring 232 provided on the rotating shaft 231, a first bearing 233 provided at the upper end of the rotating shaft 231, and a second bearing 234 provided at the lower end of the rotating shaft 231. including. Correspondingly, the housing 21 has a first bearing chamber 213 that fits a first bearing 233 and a second bearing chamber 214 that fits a 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 provided between the first bearing 233 and the magnetic ring 232.

The air passage 10 includes an inner ring 11 and an outer ring 12 that are arranged concentrically. The inner ring 11 surrounds the housing 21 so that a circular through cavity 111 is formed that fits therein. A ventilation cavity 13 in which a plurality of deflectors 131 are provided is formed between the inner ring 11 and the outer ring 12 .

During assembly, the stator assembly 22 and the PCB board 24 are placed into the mounting cavity 211 of the housing 21 through the notch 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 attached to the housing 21. By this, the armature module 20 is formed, and then the entire armature module 20 is placed in the circular through cavity of the air duct 10, and the armature module 20 is placed on the contact surface with the circular through cavity 111 of the housing 21. An adhesive can be applied to make the connection between both 20 and the airway 10 stronger. The stability of the connection can be further improved by interference fit alone or by a combination of interference fit and adhesive application.

Furthermore, the PCB board 24 is provided on the upper end of the magnetic ring 232, and the housing 21 is formed with a corresponding wire hole 215. In order to facilitate machining, the wire passage hole 215 is preferably provided on the upper end surface of the housing 21 so as to be located at the edge. In this embodiment, since the PCB board 24 uses a lead wire type wiring method, corresponding wire holes are formed in the housing 21. In other embodiments, the wiring scheme of the PCB board 24 may be conductive 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 weld and fix the PCB board 24 to the stator assembly 22 via pins.

On the other hand, as shown in FIG. 9, the notch 212 of the housing 21 has an arc length larger than one-third of the circumferential length of the housing 21 and smaller than two-thirds of the circumferential length of the housing 21. It is arc-shaped. In actual application, the arcuate length of the notch 212 is preferably equal to one-half of the circumferential length of the housing 21. This makes it possible to conveniently attach parts such as the stator assembly 22 to the housing 21.

Note that the motor of the present application is mainly applied to hair dryer products, but is not limited thereto. The present application has the following advantages by improving the motor to a split design.

1. A first bearing 233 and a second bearing 234 are provided at both ends of the rotating shaft 231, respectively, and two or one bearing is connected to the rotating shaft 231 in the conventional cantilever arm structure of a motor (for example, CN217335308U, CN21369626). (provided on one side of the rotor assembly 23), the swing width of the rotor assembly 23 is smaller and the noise is smaller. Furthermore, the motor of the present application can ensure the stability of the motion of the rotor assembly 23 even when the length of the armature is increased to increase the power density of the motor (increase the air volume of motor operation). .

2. The housing 21 is a metal member (preferably aluminum alloy, but may also be zinc alloy or stainless steel), and is formed by a single clamping and machining process using a precision machine tool. , a first bearing chamber 213, and a second bearing chamber 214 are formed.In contrast to the conventional technology (for example, CN217590465U), the two bearing chambers are formed by one clamping and machining process using a precision machine tool, and are not required during subsequent assembly. The linearity of the first bearing 233 and the second bearing 234 can be guaranteed, and the forces received by the first bearing 233 and the second bearing 234 during motor operation become more uniform, which is advantageous in reducing motor noise and extending the motor life. .

Furthermore, due to the split design, the concentricity of the two bearing chambers (holes) becomes smaller and can reach concentricity of 0.001 mm level, but compared to the conventional method where two bearing chambers are provided in the air passage 10 and the rear cover, respectively. In this method, the concentricity of the two bearing chambers can only reach the 0.01 mm level. This further improves the operational stability of the motor and reduces operational noise.

3. During assembly, the entire armature module 20 is placed in the circular through-hole cavity, and then reinforced with adhesive or through slight interference press-fitting, locking with screws, etc. The assembly steps required are reduced, resulting in higher assembly efficiency.

4. The structure of the air channel 10 is simpler than the conventional technology, and the conventional air channel 10 (eg, CN217335308U, CN217590465U) is designed so that it needs to be processed on a machine tool after demolding. The specific processing steps are as follows: First, one end (upper end) of the airway 10 is fixed with a clamp and the airway 10 is processed, and after the processing is completed, the airway 10 is taken out and the other end (lower end) of the airway 10 is processed. is fixed with a clamp, and one end surface (upper end surface) of the air passage 10 is processed.

The processing of the air channel 10 of the present application is completed by simply clamping and fixing only the upper end of the air channel 10 after releasing the mold, processing the air channel 10, and taking it out after the processing is completed. One clamping step is reduced, production efficiency is improved, and one clamping and processing also has the advantage of ensuring product precision and product consistency.

Note that the air passage 10 of the present application is usually 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. Since the elastic member 235 is provided between the first bearing 233 and the magnetic ring 232, the mechanical noise caused by the play of the motor bearing can be effectively reduced, and the experience of using the motor (hair dryer) can be improved. . Specifically, the elastic member 235 is typically a spring. Usually, the rotating shaft 231 is provided with a first sleeve 236 and a second sleeve 237 at 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.

Preferably, a first adhesive storage groove 2131 is provided on an inner wall of the first bearing chamber 213 and/or an outer surface of the first bearing 233. Similarly, a first adhesive storage groove 2131 is preferably provided on the inner wall of the second bearing chamber 214 and/or the outer surface of the second bearing 234. 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 becomes stronger, and the operation is improved. More stable and less noise. Specifically, the first adhesive storage groove 2131 may be a ring-shaped groove. Usually, the groove depth of the ring-shaped groove is 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, and the second adhesive storage groove 2311 may be provided to accommodate the adhesive. This further improves the assembly stability between the rotating shaft 231 and the bearing. Usually, the second adhesive storage groove 2311 is usually a ring-shaped groove, and the groove depth of the second adhesive storage groove 2311 is usually 0.02 to 0.10 mm. Specifically, one or two second adhesive storage grooves 2311 may be provided at locations corresponding to the first bearing 233 of the rotating shaft 231 and corresponding to the second bearing 234 of the rotating shaft 231. One or two may be provided at each location. Of course, the second adhesive storage groove 2311 may be a knurled groove.

Further, the lower end surface of the inner ring 11 of the air passage 10 is such that an accommodation position 14 for accommodating the 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. A fan blade 25 is 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, which is located at the housing position 14. Preferably, the fan blade 25 is a metal fitting. Specifically, the fan blade 25 is preferably made of a magnesium aluminum alloy, which has the advantage of being lighter in mass and has structural strength that satisfies the operating requirements of the motor. The fan blade 25 has 13 blades. Of course, the fan blades 25 may be made of conventional aluminum alloy or plastic members.

Note that the deflector 131 is arranged vertically, and has a curved shape with a constant inclination. Specifically, the inclination angle of the deflector 131 gradually decreases from the bottom to the top. provided. In this way, by making the deflected airflow at the tip of the airway 10 into an airflow that flows in the axial direction, the airflow can be quickly caused to flow out. Specifically, left and right fan blades 25 are provided at the tip of the air passage 10, and the airflow introduced by the fan blades 25 is non-vertical in the direction of deflection, and the tip of the deflector 131 is provided accordingly, and the airflow introduced by the fan blades 25 is non-vertical. Since the sides are straight, the airflow is guided to flow in the axial direction and is quickly discharged.

The above are only preferred embodiments of the present invention, and there is no limitation on the technical scope of the present invention. Therefore, any minor modifications or equivalent changes that may be made to the above embodiments based on the technical essence of the present invention. and modifications still fall within the scope of the technical means of the present invention.

10, Air passage 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 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 airway and armature module, the armature module including a housing, a stator assembly, a rotor assembly and a PCB board mounted within the housing, the housing being cylindrical with a mounting cavity therein; , and the housing is provided with a notch that communicates with the mounting cavity,
The rotor assembly includes a rotating shaft, a magnetic ring provided on the rotating shaft, a first bearing provided at an upper end of the rotating shaft, and a second bearing provided at a lower end of the rotating shaft. , the housing has a first bearing chamber that fits the first bearing, and a second bearing chamber that fits the second bearing, and an elastic member is provided between the first bearing and the magnetic ring. established,
The airway 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 into the housing, and a space between the inner ring and the outer ring. , a ventilation cavity is formed in which a plurality of deflectors are provided;
A split type motor characterized by: The first bearing chamber is provided to protrude from the upper end of the housing, and the second bearing is provided to protrude from the lower end of the housing.
The split type motor according to claim 1, characterized in that: The notch in the housing has an arc shape with an arc length larger than one-third of the circumference of the housing and smaller than two-thirds of the circumference of the housing.
The split motor according to claim 2, characterized in that: The housing is made of aluminum alloy, 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 an inner wall of the first bearing chamber and/or an outer surface of the first bearing;
Alternatively, a first adhesive storage groove is provided on an inner wall of the second bearing chamber and/or an outer surface of the second bearing.
The split type motor according to claim 4, characterized in that: the first adhesive storage groove is a ring-shaped groove;
The split type motor according to claim 5, characterized in that: The rotating shaft is provided with a second adhesive storage groove at a location corresponding to the mounting of the bearing.
The split type motor according to claim 4, characterized in that: The lower end surface of the inner ring of the air passage is arranged so that a housing position for accommodating the fan blade is formed between the lower end surface of the inner ring and the lower end surface of the outer ring. A fan blade located at the rear surface and located at the housing position is provided at the lower end of the rotating shaft.
The split type motor according to claim 4, characterized in that: The fan blade is a metal member or a plastic member.
The split 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 becomes gradually smaller from the bottom to the top.
The split type motor according to claim 9, characterized in that:

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