KR20240000943U - Split type motor - Google Patents

Abstract

The split motor disclosed in the present invention includes an air passage and an armature module; The armature module includes a housing, a stator assembly, a rotor assembly, and a PCB board; The housing is cylindrical, and the rotor assembly includes a rotating shaft, a magnetic ring, a first bearing, and a second bearing; The housing is provided with a first bearing chamber and a second bearing chamber; And, an elastic member is installed between the first bearing and the magnetic ring; The air passage includes an inner ring and an outer ring installed with the same midpoint; A circular through cavity matching the housing is formed around the inner ring; A ventilated cavity is formed between the inner ring and the outer ring, and a plurality of air flow plates are installed in the ventilated cavity. Therefore, by designing a split ventilator, the ventilator can be assembled more easily, and the specific design of the ventilator can provide the advantage of low noise and stable operation.

Description

Split type motor {SPLIT TYPE MOTOR}

The present invention relates to a split motor related to the motor field, mainly used in hair dryers, but is not limited to this.

The motor is one of the essential parts in a hair dryer. The power and quality of the motor directly affect the service life and user experience of the hair dryer. A variety of motors have been released on the market to reduce the noise generated when the hair dryer motor operates and to increase the amount of air inflow into the hair dryer and the service life of the motor.

For example, Chinese Patent Publication No. CN217335308 U discloses a motor used in a hair dryer, installing a bearing on the rotation axis of the rotor assembly to increase the stability of the rotor when rotating, reducing vibration and noise, and installing a bearing on the rotation axis of the magnetic ring. Two bearings were installed on one side. This was able to reduce vibration to some extent, but the following problems still existed. First, the length of the armature in the motor structure cannot be designed to be long, and if it is designed to be long, vibration and noise increase when the motor rotates at high speed. Therefore, the power density of this motor is also relatively low and is not suitable for rotating at maximum speed. In addition, the air passage used in this motor must be clamped and processed twice with a machine tool after manufacturing the mold, which reduces production efficiency;

The Chinese patent on motors of other structures, published number CN217590465 U, also discloses a motor used in a hair dryer, in which bearings are installed at both ends of the rotation axis of the rotor assembly to improve stability; The problem with this technology is that one bearing chamber is installed in the air passage, and the other bearing chamber is installed in the rear cover, so the straightness of the two bearing chambers is not good, and when the rotor assembly is rotated, The force received by the two bearings is not the same, which may cause loud noise; Additionally, when assembled, the rear cover is fixed to the air passage through screws, making assembly relatively cumbersome.

Therefore, new technological solutions must be studied to solve the above-mentioned problems.

The present invention provides a split motor to solve the problems of the prior art described above. By designing a split ventilator, the ventilator can be more easily assembled, and the specific design of the ventilator provides the advantage of low noise and stable operation. can be provided.

The present design adopts the following technical measures to achieve the above purpose.

The split motor of the present invention includes an air passage and an armature module; The armature module includes a housing, a stator assembly mounted inside the housing, a rotor assembly, and a PCB plate; The housing has a cylindrical shape with a mounting cavity therein, and a notch communicating with the mounting cavity is installed in the housing; From here,

The rotor assembly includes a rotating shaft, a magnetic ring installed on the rotating shaft, a first bearing installed on an upper end of the rotating shaft, and a second bearing installed on a lower end of the rotating shaft; Correspondingly, the housing is provided with a first bearing chamber matched with the first bearing and a second bearing chamber matched with the second bearing; And, an elastic member is installed between the first bearing and the magnetic ring;

The air passage includes an inner ring and an outer ring installed with the same midpoint; A circular through cavity matching the housing is formed around the inner ring; A ventilated cavity is formed between the inner ring and the outer ring, and a plurality of air flow plates are installed in the ventilated cavity.

Preferably, the first bearing chamber is protrudingly installed at the upper end of the housing, and the second bearing is protrudingly installed at the lower end of the housing.

Preferably, the notch of the housing is arcuate and the arch length is longer than 1/3 of the circumference of the housing and less than 2/3 of the circumference of the housing.

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

Preferably, a first adhesive storage groove is installed on the inner wall of the first bearing chamber and/or the outer surface of the first bearing;

Alternatively, the first adhesive storage groove is installed on the inner wall of the second bearing chamber and/or the outer surface of the second bearing.

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

Preferably, a second adhesive storage groove is installed at the mounting point of the bearing corresponding to the rotation axis.

Preferably, the lower surface of the inner ring in the air passage is located behind the lower surface of the outer ring, so that a receiving space for accommodating the blade is formed between the lower surface of the inner ring and the lower surface of the outer ring; A blade is installed at the bottom of the rotation shaft, and the blade is located in the receiving space.

Preferably, the blade is made of five metals (all metals such as gold, silver, copper, iron, tin, etc.) or a synthetic resin member.

Preferably, the flow plate has a curved shape with a constant inclination; The inclination angle of the flow plate is installed to gradually decrease from bottom to top.

It can be seen that the present design has the following advantages, unlike the prior art.

1. A first bearing and a second bearing are installed at both ends of the rotating shaft, and unlike the cantilever structure of a conventional motor, the swing width of the rotor assembly is smaller and the sound is quiet; In addition, the motor of the present invention ensures that the rotor assembly can move stably under conditions that increase the power density of the motor (air circulation volume increases when the motor operates) by increasing the length of the armature.

2. During the housing processing process, a first bearing chamber and a second bearing chamber are formed. Unlike the prior art, two bearing chambers are formed by clamping and processing once through a precision machine tool, which forms the first bearing chamber during subsequent assembly. The straightness of the bearing and the second bearing can be guaranteed, so the first and second bearings can receive force more evenly when the motor operates, which is more advantageous in reducing motor noise and increasing service life.

3. When assembling, the entire armature module is placed inside the circular through cavity and then fixed with adhesive or press-fitted using an interference fit method. Unlike the prior art, assembly steps such as fixing with screws are omitted, resulting in greater assembly efficiency. It gets higher.

4. The structure of the air passage is simpler than that of the prior art. The conventional air passage requires clamping and processing twice after manufacturing the mold, but the air passage of the present invention requires only one-time clamping and processing after manufacturing the mold. fixed; Not only does it increase production efficiency by reducing the clamping step once, but it also has the advantage of ensuring product precision and consistency with one clamping and processing.

5. Since an elastic member is installed between the first bearing and the magnetic ring, mechanical noise due to the bearing clearance of the motor can be effectively reduced and the user experience of the motor (hair dryer) can be improved.

The following describes the present invention in detail by combining drawings and specific examples to more clearly explain the structural features and efficacy of the present invention.

Figure 1 is a three-dimensional schematic diagram of an embodiment in the present invention.
Figure 2 is a three-dimensional schematic diagram of an embodiment in the present invention viewed from a different angle.
Figure 3 is a first exploded schematic diagram of an embodiment in the present invention.
Figure 4 is a second exploded schematic diagram of an embodiment in the present invention.
Figure 5 is a cross-sectional schematic diagram of an embodiment in the present invention.
Figure 6 is a three-dimensional schematic diagram showing the armature module in an embodiment of the present invention.
Figure 7 is a three-dimensional schematic diagram showing a housing in an embodiment of the present invention.
Figure 8 is a three-dimensional schematic diagram showing an air passage in an embodiment of the present invention.
Figure 9 is a cross-sectional schematic diagram showing the housing in an embodiment of the present invention.

The following combines the drawings to clearly and completely describe the technical solutions of the embodiments of the present invention. The described embodiments are only preferred embodiments of the present invention.

Therefore, if an element is considered to be "fixed" to another element, it must be explained that the element is directly located on another element or an element in the middle. When one element is considered to be "connected" to another element, the element may be connected to the other element or may exist simultaneously in the middle element. The technical terms “vertical,” “horizontal,” “left,” “right,” and similar expressions used in the present invention are used for descriptive purposes only and do not mean that they are the only embodiments.

Unless otherwise defined, all technical and scientific terms used in the present invention are consistent with meanings that can be understood by a person skilled in the art through common sense. Technical terms used in the specification of the present invention are used only for the purpose of describing specific embodiments and are not limited to the present invention. As used herein, the term “and/or” includes one or more of the listed items and all combinations that are related.

1 to 9, in the embodiment of the present invention, the split motor includes an air passage 10 and an armature module 20; The armature module 20 includes a housing 21, a stator assembly 22 mounted inside the housing 21, a rotor assembly 23, and a PCB plate 24; The housing 21 has a cylindrical shape with a mounting cavity 211 therein, and a notch 212 communicating with the mounting cavity 211 is installed in the housing 21; From here,

The rotor assembly 23 includes a rotation shaft 231, a magnetic ring 232 installed on the rotation shaft 231, a first bearing 233 installed on the top of the rotation shaft 231, and a first bearing 233 installed on the bottom of the rotation shaft 231. It includes a second bearing 234; Correspondingly, the housing 21 is provided with a first bearing chamber 213 matched with the first bearing 233 and a second bearing chamber 214 matched with the second bearing 234; The first bearing chamber 213 is protrudingly installed at the upper end of the housing 21, and the second bearing 234 is protrudingly installed at the lower end of the housing 21; And, an elastic member 235 is installed between the first bearing 233 and the magnetic ring 232;

The air passage 10 includes an inner ring 11 and an outer ring 12 installed with the same center; A circular through cavity 111 matching the housing 21 is formed around the inner ring 11; A ventilated cavity 13 is formed between the inner ring 11 and the outer ring 12, and a plurality of flow plates 131 are installed in the ventilated cavity 13.

When assembling, the stator assembly 22 and the PCB plate 24 are placed into the mounting cavity 211 of the housing 21 at the notch 212 point of the housing 21, and the rotor assembly 23 is placed in the housing 21. ) is penetrated from the second bearing chamber 214 at the bottom and is mounted on the housing 21; The armature module 20 is formed, the entire armature module 20 is placed inside the circular through cavity of the air passage 10, and the contact surface in the housing 21 and in contact with the circular through cavity 111 is coated with adhesive. By doing so, the connection between the two armature modules 20 and the air passage 10 can be made more robust. In addition, stability can be further improved when connecting by adopting the interference fitting method alone or by combining the interference fitting method and adhesive coating.

Furthermore, the PCB plate 24 is installed on the top of the magnetic ring 232, and a corresponding lead passage hole 215 is installed in the housing 21. Preferably, the lead passage hole 215 is installed on the upper surface of the housing 21 and is located at the edge, thereby facilitating machining with a machine tool. In the content to be supplemented, in this embodiment, since the connection method of the PCB board 24 is lead-type, the housing 21 is provided with a corresponding lead passage hole 215; In other embodiments, the connection method of the PCB plate 24 may also be conductive through the terminal, so that after exposing the PCB plate 24 to which the terminal block is welded to the outside of the housing 21, the PCB plate 24 is connected to the pin. It only needs to be welded and fixed with the fixing assembly 22.

At the same time, as shown in FIG. 9, the notch 212 of the housing 21 is arcuate, and the arch length is longer than 1/3 of the circumference of the housing 21 and 2/3 of the circumference of the housing 21. less than 3; In practical application, preferably, the arch length of the notch 212 is equal to one-third the length of the circumference of the housing 21. In this way, components such as the stator assembly 22 can be easily installed in the housing 21.

The motor of the present invention is mainly used in, but is not limited to, hair dryer products; The present invention improves the motor to a split design to obtain the following advantages.

1. A first bearing 233 and a second bearing 234 are installed at both ends of the rotating shaft 231, respectively, and a cantilever-type structure of a conventional motor (e.g. CN217335308 U, CN21369626; two or one bearing is installed on the rotating shaft ( (installed on one side of 231), the swing width of the rotor assembly 23 is smaller and the sound is quiet; In addition, the motor of the present invention can ensure that the rotor assembly 23 can move stably under the condition of increasing the power density of the motor (the amount of air flow in the motor operation is increased) by increasing the length of the armature.

2. The housing 21 is a five-piece member (preferably aluminum alloy is selected, but zinc alloy or stainless steel may also be selected), which is formed by one-time clamping and processing through a precision machine tool, During the processing of the housing 21, a first bearing chamber 213 and a second bearing chamber 214 are formed. Unlike the prior art (e.g., CN217590465 U), the two bearing chambers are formed once through a precision machine tool. When formed by clamping and processing, it can ensure the straightness of the first bearing 233 and the second bearing 234 during subsequent assembly, so that the first bearing 233 and the second bearing ( 234) can receive force more uniformly, which is more advantageous in reducing motor noise and increasing service life.

As a supplement, through the split design, the concentricity of the two bearing chambers (holes) can be made smaller, reaching a concentricity of 0.001mm, and traditionally, the two bearing chambers are each connected to an air passage (10 ) and the installation method on the rear cover, so the concentricity of the two bearing chambers can reach up to 0.01mm; Work noise can be reduced while further improving the work stability of the motor.

3. When assembling, the entire armature module 20 is placed inside the circular through cavity 111 and then fixed with adhesive or press-fitted using an interference fit method, and unlike the prior art (e.g. CN217590465 U), it is fixed with screws. Since assembly steps such as ordering are omitted, assembly efficiency is further increased.

4. The structure of the air passage 10 is simpler than that of the prior art, and the design of the conventional air passage 10 (e.g. CN217335308 U, CN217590465 U) requires processing on a machine tool after manufacturing the mold. The specific processing step is to process the air passage 10 by first clamping and fixing one end (upper end) of the air passage 10; After processing is completed, the air passage 10 is taken out and the other end (lower end) of the air passage 10 is clamped and fixed to process one end (upper end) of the air passage 10.

The air passage 10 of the present invention is manufactured by clamping and fixing only the top of the air passage 10 after manufacturing the mold, and then processing the air passage 10; If you take it out after processing, the processing is complete. This not only increases production efficiency by reducing the number of clamping steps, but also has the advantage of ensuring product precision and consistency with one clamping and processing.

As a supplement, the air passage 10 of the present invention is a concave member (i.e. made of a metal material such as zinc); When the standard for the structural strength of the air passage 10 is not high, the air passage 10 of the present invention may be made of plastic, which can further reduce production costs; This provides a new idea for manufacturers to control production costs in the split design of the present invention.

5. An elastic member 235 is installed between the first bearing 233 and the magnetic ring 232, effectively reducing mechanical noise due to the bearing clearance of the motor and improving the experience of using the motor (hair dryer). You can do it. Specifically, the elastic member 235 is generally a spring. In general, a first bushing 236 and a second bushing 237 are correspondingly installed on the rotation axis 231 located at the upper and lower ends of the magnetic ring 232, and the spring (elastic member 235) is installed between the first bearing 233 and the first bushing 236.

Preferably, a first adhesive storage groove 2131 is installed on the inner wall of the first bearing chamber 213 and/or the outer surface of the first bearing 233; Likewise, preferably, a first adhesive storage groove 2131 is installed on the inner wall of the second bearing chamber 214 and/or the outer surface of the second bearing 234. Accommodating the adhesive through the installation of the first adhesive storage groove 2131 can further improve the adhesion between the bearing and the bearing chamber, so that the bearing and the bearing chamber are more firmly connected, enabling stable operation and minimizing noise. Specifically, the first adhesive storage groove 2131 may be a ring-shaped concave groove. Generally, the groove depth of the ring-shaped concave groove is 0.02 to 0.10 mm; One to three first adhesive storage grooves 2131 may be installed on the inner wall of the first bearing chamber 213 and the inner wall of the second bearing chamber 214.

Preferably, the second adhesive storage groove 2311 can be installed at the bearing mounting point corresponding to the rotation axis 231, and the adhesive can be accommodated through the installation of the second adhesive storage groove 2311, so that the rotation shaft 231 ) and stability can be further improved when the bearings are assembled. Generally, the second adhesive storage groove 2311 is a ring-shaped concave groove, and the groove depth of the second adhesive storage groove 2311 is 0.02 to 0.10 mm; Specifically, one to two second adhesive storage grooves 2311 are installed at the first bearing 233 point corresponding to the rotation axis 231, and are installed at the second bearing 234 point corresponding to the rotation axis 231. One or two may be installed. Of course, the second adhesive storage groove 2311 may be a tooth-shaped groove that has been knurled.

Furthermore, the lower surface of the inner ring 11 in the air passage 10 is located behind the lower surface of the outer ring 12, and there is a space between the lower surface of the inner ring 11 and the lower surface of the outer ring 12. A receiving space 14 is formed to accommodate the blade 25; A blade 25 is installed at the bottom of the rotation shaft 231, and the blade 25 is located in the receiving space 14. Preferably, the blade 25 is a concave member; Specifically, preferably, the blade 25 is made of magnesium alloy, so that it has the advantage of lighter mass and its structural strength can meet the working conditions of the motor; And, the blade 25 has 13 blade pieces; Likewise, the blade 25 may also be a traditional aluminum alloy or synthetic resin member.

In the content to be supplemented, the airflow plate 131 is installed vertically, and the airflow plate 131 has a curved shape with a constant inclination; Specifically, the inclination angle of the flow plate 131 is installed to gradually decrease from bottom to top. Therefore, the biased airflow at the front of the air passage 10 is converted into an airflow flowing in the axial direction, so that the airflow can quickly flow out. Specifically, left and right blades 25 are installed at the front end of the air passage 10, the airflow introduced by the blades 25 is in a biased direction and is non-vertical, and the front end of the air flow plate 131 is installed correspondingly. , By installing the rear side in a straight line, the airflow can be led to flow in the axial direction and discharged quickly.

The above-mentioned contents are only preferred embodiments of the present invention, and do not limit the technical scope of the present invention. Therefore, all modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are included within the scope of protection of the present invention.

10: Air passage
11: Inner ring
111: circular through cavity
12: paddle
13: ventilated cavity
131: Current plate
14: Accommodation space
20: armature module
21: housing
211: mounting cavity
212: notch
213: first bearing chamber
2131: First adhesive storage groove
214: second bearing chamber
215: Lead passing hole
22: stator assembly
23: rotor assembly
231: rotation axis
2311: Second adhesive storage groove
232: magnetic ring
233: first bearing
234: second bearing
235: Elastic member
236: First bushing (Bushing)
237: second bushing
24: PCB board
25: blade

Claims (10)

In a split motor,
Contains an air passage and an armature module; The armature module includes a housing, a stator assembly mounted inside the housing, a rotor assembly, and a PCB plate; The housing has a cylindrical shape with a mounting cavity therein, and a notch communicating with the mounting cavity is installed in the housing; From here,
The rotor assembly includes a rotating shaft, a magnetic ring installed on the rotating shaft, a first bearing installed on an upper end of the rotating shaft, and a second bearing installed on a lower end of the rotating shaft; Correspondingly, the housing is provided with a first bearing chamber matched with the first bearing and a second bearing chamber matched with the second bearing; And, an elastic member is installed between the first bearing and the magnetic ring;
The air passage includes an inner ring and an outer ring installed with the same midpoint; A circular through cavity matching the housing is formed around the inner ring; A split motor, characterized in that a ventilated cavity is formed between the inner ring and the outer ring, and a plurality of flow plates are installed in the ventilated cavity. According to paragraph 1,
A split motor, wherein the first bearing chamber is protrudingly installed at the top of the housing, and the second bearing is protrudingly installed at the bottom of the housing. According to paragraph 2,
A split motor, wherein the notch of the housing is arcuate and the arch length is longer than 1/3 of the circumference of the housing and less than 2/3 of the circumference of the housing. According to any one of claims 1 to 3,
Split motor, characterized in that the housing is made of aluminum alloy, zinc alloy or stainless steel. According to clause 4,
A first adhesive storage groove is installed on an inner wall of the first bearing chamber and/or an outer surface of the first bearing;
Alternatively, the split motor is characterized in that the first adhesive storage groove is installed on the inner wall of the second bearing chamber and/or the outer surface of the second bearing. According to clause 5,
A split motor, characterized in that the first adhesive storage groove is a ring-shaped concave groove. According to clause 4,
A split motor, characterized in that a second adhesive storage groove is installed at the mounting point of the bearing corresponding to the rotating shaft. According to clause 4,
The lower end of the inner ring in the air passage is located behind the lower end of the outer ring, so that a receiving space for accommodating the blade is formed between the lower end of the inner ring and the lower end of the outer ring; A split motor, characterized in that a blade is installed at the bottom of the rotation shaft, and the blade is located in the receiving space. According to clause 8,
A split motor, wherein the blade is made of five metals (all metals such as gold, silver, copper, iron, tin, etc.) or a synthetic resin member. According to clause 9,
The flow plate has a curved shape with a constant inclination; A split motor, characterized in that the inclination angle of the flow plate is installed to gradually decrease from bottom to top.