CN115528837A - Thin fan and thin motor - Google Patents

Thin fan and thin motor Download PDF

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Publication number
CN115528837A
CN115528837A CN202211165223.4A CN202211165223A CN115528837A CN 115528837 A CN115528837 A CN 115528837A CN 202211165223 A CN202211165223 A CN 202211165223A CN 115528837 A CN115528837 A CN 115528837A
Authority
CN
China
Prior art keywords
rotor
rotating shaft
rotor shell
stator
shell
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202211165223.4A
Other languages
Chinese (zh)
Inventor
叶政宪
詹智伟
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Delta Electronics Inc
Original Assignee
Delta Electronics Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Delta Electronics Inc filed Critical Delta Electronics Inc
Priority claimed from CN201710494155.9A external-priority patent/CN108425865A/en
Publication of CN115528837A publication Critical patent/CN115528837A/en
Pending legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H02K1/2786—Outer rotors
    • H02K1/2787—Outer rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
    • H02K1/2789—Outer rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
    • H02K1/2791—Surface mounted magnets; Inset magnets
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/02—Casings or enclosures characterised by the material thereof
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/10—Casings or enclosures characterised by the shape, form or construction thereof with arrangements for protection from ingress, e.g. water or fingers
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/003—Couplings; Details of shafts
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
    • H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information

Abstract

A thin fan comprises a fan frame and a driving device, wherein the driving device is arranged in the fan frame. The driving device comprises a stator structure and a rotor structure. The stator structure comprises a stator magnetic pole group and a base, wherein the base is connected with the fan frame, and the stator magnetic pole group is arranged at the outer edge of the base. The rotor structure is arranged corresponding to the stator structure and comprises a rotor shell, a magnetic structure and an impeller. The center of the rotor shell is provided with a columnar rotating shaft, the rotating shaft is deeply arranged in the seat body, the magnetic structure is arranged on the inner wall of the rotor shell, and the magnetic structure is driven by the magnetic induction of the stator magnetic pole group to drive the rotor shell to rotate. The impeller is connected with the rotor housing. The rotor shell and the rotating shaft are made of pure metal materials or alloy materials with the same material, and the rotor shell and the rotating shaft are turned once; the rotor shell further comprises a protruding structure, and the protruding structure, the rotor shell and the rotating shaft are made of a single workpiece in a seamless integrated forming mode; the surface of the rotating shaft is further provided with a plurality of groove structures.

Description

Thin fan and thin motor
Technical Field
The present invention relates to a slim fan and a slim motor, and more particularly, to a slim fan and a slim motor in which a rotor case and a rotation shaft are integrally formed.
Background
The heat dissipation efficiency of the existing electronic device is one of the important factors that affects the performance and the service life of the electronic device, and the heat dissipation fan is applied to the heat dissipation of the electronic device, and the heat dissipation fan drives the ambient air to generate air flow so as to improve the heat dissipation efficiency of the electronic component.
However, in order to match with the trend of thinning various electronic devices, the fan structure or the motor thereof is also thinning; when a rotor shell and a rotating shaft are combined, the rotor structure of a traditional thin fan or a thin motor can only be combined in a laser welding mode due to the influence of the thickness of an iron shell of the rotor shell, however, the laser welding can cause the problems of unstable manufacturing process of the rotor shell, hole breaking and oil leakage of the iron shell, deflection generated during operation, poor vibration-resistant structure and the like. When the rotor shell and the rotating shaft are integrated by a punch forming mode, the flatness of the magnet ring surface of the punch formed rotor shell, the precision of the inner diameter of the rotor shell, the drawing angle and other processing errors can cause assembly errors and unstable operation of the rotor structure, especially in the design of ultra-thin fans and ultra-thin motors, because the gaps of all elements are very small, once the situation occurs, serious interference problems can be caused when the rotor structure operates, and the subsequent manufacturing process and the assembly difficulty are greatly increased.
Therefore, it is an important subject to optimize the process stability of the rotor structure, improve the precision of the process and assembly, reduce the assembly process of each component, and further improve the operation efficiency of the slim fan and slim motor.
Disclosure of Invention
In view of the above, the present invention provides a thin fan to increase the overall process stability, reduce the number of assembly steps, and reduce the manufacturing and inspection costs.
The invention provides a thin fan which comprises a fan frame and a driving device, wherein the driving device is arranged in the fan frame. The driving device comprises a stator structure and a rotor structure. The stator structure comprises a stator magnetic pole group and a base, wherein the base is connected with the fan frame, and the stator magnetic pole group is arranged on the outer edge of the base. The rotor structure is arranged corresponding to the stator structure and comprises a rotor shell, a magnetic structure and an impeller. The center of the rotor shell is formed with a columnar rotating shaft which is deep into the seat body, wherein the rotor shell and the rotating shaft are directly processed into a single component by a workpiece made of a single material. The magnetic structure is arranged on the inner wall of the rotor shell and is driven by the magnetic induction of the stator magnetic pole group to drive the rotor shell to rotate. The impeller is connected with the rotor housing.
In one embodiment, the maximum height of the fan frame is no greater than 5 mm.
In one embodiment, the rotor shell and the rotating shaft are made of pure metal materials or alloy materials with the same material, and the rotor shell and the rotating shaft are turned once or molded once.
In one embodiment, the rotor housing further includes an oil seal cover disposed on the rotor housing and surrounding the outer edge of the rotating shaft, and the oil seal cover is disposed corresponding to the seat body.
In one embodiment, the rotor housing further includes a protrusion disposed on the other surface of the rotor housing opposite to the rotation shaft, the protrusion corresponding to the rotation shaft, wherein the protrusion, the rotor housing and the rotation shaft are directly formed as a single component by processing a single material.
In one embodiment, the protruding structure is a pillar structure, an arc structure, a hemispherical structure or a cone structure.
In one embodiment, the surface of the rotating shaft further has a plurality of groove structures, wherein the groove structures are annular grooves, oblique lines, V-shaped lines or U-shaped lines.
In one embodiment, the rotor shell has a plurality of dynamic embossing patterns or thrust patterns on a surface facing the stator structure and opposite to the housing.
In one embodiment, the rotor shell faces the surface of the stator structure and forms an oil-removing layer opposite to the seat body.
The present invention further provides a slim motor, which includes a motor housing and a driving device disposed in the motor housing. The driving device comprises a stator structure and a rotor structure. The stator structure comprises a stator magnetic pole group and a base body, wherein the base body is connected with the motor shell, and the stator magnetic pole group is arranged at the outer edge of the base body. The rotor structure is arranged corresponding to the stator structure and comprises a rotor shell and a magnetic structure. A columnar rotating shaft is formed in the center of the rotor shell, and one end of the rotating shaft is deep into the seat body. The rotor shell and the rotating shaft are directly machined from a workpiece made of a single material to form a single component. The magnetic structure is arranged on the inner wall of the rotor shell and is driven by the magnetic induction of the stator magnetic pole group to drive the rotor shell to rotate.
In one embodiment, the maximum height of the motor housing is no greater than 5 mm.
In one embodiment, the rotor shell and the rotating shaft are made of pure metal materials or alloy materials with the same material, and the rotor shell and the rotating shaft are turned once or molded once.
In an embodiment, the rotor casing further includes an oil seal cover disposed on the rotor casing and surrounding an outer edge of the rotating shaft, and the oil seal cover is disposed corresponding to the seat body.
In one embodiment, the surface of the rotating shaft further has a plurality of groove structures, wherein the groove structures are annular grooves, oblique lines, V-shaped lines or U-shaped lines.
In one embodiment, the rotor shell has a plurality of dynamic embossing patterns or thrust patterns on a surface facing the stator structure and opposite to the housing.
In one embodiment, a surface of the rotor shell facing the stator structure forms an oil-removing layer relative to the base.
As described above, the thin fan and the thin motor of the present invention are formed by directly processing the rotor housing and the rotating shaft from a single material workpiece to form a single component, and the seamless integrally formed rotor housing and rotating shaft are used to improve the precision, flatness and yield of the components, increase the stability of the overall process, and do not need to add a laser welding step, thereby reducing the assembling process of the thin fan and the thin motor and reducing the manufacturing cost.
The thin fan and the thin motor can increase the capability of preventing oil leakage by using the design of an oil layer, thereby improving the running efficiency and the service life of the thin fan and the thin motor.
Drawings
Fig. 1A is a schematic perspective view of a thin fan according to a preferred embodiment of the invention.
Fig. 1B is an exploded view of the thin fan shown in fig. 1A.
FIG. 1C isbase:Sub>A cross-sectional view of the thin fan of FIG. 1A taken along line A-A.
Fig. 2A to 2D are schematic diagrams of different aspects of the protrusion structure, respectively.
Fig. 3A to 3D are schematic diagrams of different aspects of the groove structure, respectively.
Fig. 4A is a schematic perspective view of a thin motor according to a preferred embodiment of the invention.
Fig. 4B is a cross-sectional view of the thin motor shown in fig. 4A taken along the line C-C.
Wherein the reference numerals are as follows:
1: fan frame
2: driving device
21: stator structure
211: stator magnetic pole group
212: base body
22: rotor structure
221: rotor shell
2211: rotating shaft
2212: oil seal cover
2213. 2213a, 2213b, 2213c, 2213d: projection structure
222: magnetic structure
223: impeller
3: motor casing
4: drive device
41: stator structure
411: stator magnetic pole group
412: seat body
42: rotor structure
421: rotor shell
4211: rotating shaft
4212: oil seal cover
422: magnetic structure
A-A, C-C: line segment
F: thin fan
G. G1, G2, G3, G4: groove structure
M thin type motor
Detailed Description
A thin fan and a thin motor according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings, in which like elements will be described with like reference numerals.
Referring to fig. 1A to fig. 1C, fig. 1A is a schematic perspective view of a thin fan according to a preferred embodiment of the invention; FIG. 1B is an exploded view of the thin fan shown in FIG. 1A; FIG. 1C isbase:Sub>A cross-sectional view of the thin fan of FIG. 1A taken along line A-A.
The invention provides a thin fan F, which comprises a fan frame 1 and a driving device 2, wherein the driving device 2 is arranged in the fan frame 1. The driving device 2 includes a stator structure 21 and a rotor structure 22. The stator structure 21 includes a stator magnetic pole group 211 and a base 212, the base 212 is connected to the fan frame 1, and the stator magnetic pole group 211 is disposed on an outer edge of the base 212. The rotor structure 22 is disposed corresponding to the stator structure 21, and the rotor structure 22 includes a rotor shell 221, a magnetic structure 222 and an impeller 223. A cylindrical rotating shaft 2211 is formed at the center of the rotor housing 221, the rotating shaft 2211 extends into the base 212, and the base 212 may be a bearing and/or a bushing. The rotor case 221 and the rotating shaft 2211 are directly machined from a single material workpiece to form a single component. The magnetic structure 222 is disposed on the inner wall of the rotor shell 221, and the magnetic structure 222 is magnetically driven by the stator magnetic pole group 211 to drive the rotor shell 221 to rotate. The impeller 223 is connected to the rotor case 221.
In this embodiment, the rotor shell 221 and the rotating shaft 2211 are made of pure metal materials or alloy materials with the same material, and the rotor shell 221 and the rotating shaft 2211 are formed by one-step turning or one-step molding, rather than being connected in an assembly, welding, bonding or clamping manner. In the present embodiment, the rotor shell 221 and the rotating shaft 2211 are a single component integrally formed in a seamless manner, and the rotor shell 221 made of metal can achieve a thinner effect under the condition of satisfying the rigidity required by the rotor structure 22, so as to greatly reduce the height of the fan frame 1, so that the maximum height of the fan frame 1 is not greater than 5 mm, and even can reach 2.5 mm, and further thin the thin fan F.
The thin fan of the invention utilizes a precision Computer Numerical Control (CNC) lathe or molding to turn or mold the rotor shell and the rotating shaft into a seamless integrated single component, can achieve the precision and the planeness required by the rotor structure only by one-time processing, can reduce the material parts of the rotating shaft, reduce the production cost, eliminate the risks of broken holes and poor planeness of the rotor shell caused by laser welding and punch forming in the current thin fan manufacturing process, increase the overall manufacturing process stability and yield, and simplify the complicated working procedures of thin fan assembly.
As mentioned above, the rotor shell 221 further includes an oil seal cap 2212 disposed on the rotor shell 221 and surrounding the outer edge of the rotating shaft 2211, the oil seal cap 2212 is disposed corresponding to the seat body 212, the seat body 212 can be a bearing and/or a bushing, and the oil seal cap 2212 can be disposed outside the bearing or inside the bushing, or further between the bearing and the bushing. Furthermore, by utilizing the characteristic of one-step machining of turning or molding by a CNC lathe, the rotor shell 221 and the rotating shaft 2211 can be a seamless integrated single component, and in combination with the oil seal cap 2212 of the present embodiment, the oil leakage prevention capability of the thin fan F can be improved, the service life of the thin fan F can be increased, the space occupied by each component can be reduced, and the volume of the thin fan F can be further greatly reduced.
Referring to fig. 2A to 2D, in the present embodiment, the thin fan F further utilizes a one-step processing characteristic, so that the rotor shell 221 further includes a protruding structure 2213 to reduce the collision between the rotor structure 22 and the external system; the protruding structure 2213 is disposed on the other surface of the rotor shell 221 opposite to the rotating shaft 2211, and the protruding structure 2213 is disposed corresponding to the rotating shaft 2211, wherein the protruding structure 2213, the rotor shell 221 and the rotating shaft 2211 are directly machined from a single material workpiece to form a single component, and the protruding structure has a cylindrical structure 2213a (see fig. 2A), an arc-shaped structure 2213B (see fig. 2B), a hemispherical structure 2213C (see fig. 2C) or a conical structure 2213D (see fig. 2D). In addition, the rotor structure 22 of the present embodiment can be machined or molded by a CNC lathe in one step, so that the protruding structure 2213, the rotor shell 221 and the rotating shaft 2211 are a seamless and integrally formed single component. In the operation process of the rotor structure 22, the design of the protruding structure 2213 can reduce the friction resistance of the rotor structure 22 against the external system, reduce the noise of the thin fan F when the thin fan F is subjected to the external pressure, prolong the service life of the thin fan F, and maximize the effect of reducing the friction resistance when the protruding structure 2213 is coaxial with the rotating shaft 2211.
Referring to fig. 3A to 3D, in the present embodiment, the thin fan F further uses a CNC lathe to re-machine, so that the surface of the rotating shaft 2211 further has a plurality of groove structures G, wherein the shape of the groove structures G is an annular groove G1 (see fig. 3A), an oblique line G2 (see fig. 3B), a V-shaped line G3 (see fig. 3C), or a U-shaped line G4 (see fig. 3D). By the design of the groove structure G, the axial carrying force of the rotating shaft 2211 can be increased, the stability of the operation of the rotor structure 22 can be improved, and the service life of the thin fan F can be prolonged.
In addition, the rotor shell 221 has a plurality of dynamic embossing patterns or thrust patterns (not shown) facing the surface of the stator structure 21 and corresponding to the seat body 212. And the rotor shell 221 faces the surface of the stator structure 21 and forms an oil-removing layer (not shown) opposite to the base body 212. By the design of the oil layer matching with the oil seal 2212, the oil leakage prevention capability of the thin fan F can be improved, and the service life of the thin fan F is further prolonged.
Referring to fig. 4A to fig. 4B, fig. 4A is a schematic perspective view of a thin motor according to a preferred embodiment of the invention; fig. 4B is a cross-sectional view of the thin motor shown in fig. 4A taken along line C-C.
The present invention further provides a slim motor M comprising a motor housing 3 and a driving device 4, wherein the driving device 4 is disposed in the motor housing 3. The driving device 4 includes a stator structure 41 and a rotor structure 42. The stator structure 41 includes a stator magnetic pole set 411 and a base 412, the base 412 is connected to the motor housing 3, and the stator magnetic pole set 411 is disposed on an outer edge of the base 412. The rotor structure 42 is disposed corresponding to the stator structure 41, and the rotor structure 42 includes a rotor case 421 and a magnetic structure 422. A cylindrical rotating shaft 4211 is formed at the center of the rotor housing 421, one end of the rotating shaft 4211 extends into the seat 412, and the seat 412 may be a bearing and/or a bushing. The rotor case 421 and the rotating shaft 4211 are formed as a single member by directly machining a single material workpiece. The magnetic structure 422 is disposed on the inner wall of the rotor case 421, and the magnetic structure 422 is magnetically driven by the stator magnetic pole set 411 to drive the rotor case 421 to rotate.
In this embodiment, the rotor shell 421 and the rotating shaft 4211 are made of pure metal materials or alloy materials with the same material, and the rotor shell 421 and the rotating shaft 4211 are turned or molded at one time, rather than being connected in an assembling, welding, adhering or clamping manner. In the present embodiment, the rotor case 421 and the rotating shaft 4211 are integrally formed as a single component without a seam, and the rotor case 421 made of a metal material can achieve a thinner structure under the condition of satisfying the rigidity requirement of the rotor structure 42, so as to greatly reduce the height of the motor case 3, so that the maximum height of the motor case 3 is not greater than 5 mm, and even can reach 2.5 mm, thereby further thinning the thin motor M.
The thin motor of the invention utilizes a precision Computer Numerical Control (CNC) lathe or molding to turn or mold the rotor shell and the rotating shaft into a seamless integrated single component, can achieve the precision and the planeness required by the rotor structure only by one-time processing, can reduce the material parts of the rotating shaft, reduce the production cost, eliminate the risks of broken holes and poor planeness of the rotor shell caused by laser welding and punch forming in the current thin motor manufacturing process, increase the overall manufacturing process stability and yield, and simplify the complicated working procedures of assembling the thin motor.
Other related features of the thin motor M of the present embodiment are: the oil seal cover, the oil layer, the groove structure, the dynamic pressure texture, the thrust texture and the like have the same characteristics and principles as those of the thin fan F, and thus the description is omitted.
In summary, the thin fan and the thin motor of the invention are formed by directly turning or molding the rotor shell and the rotating shaft from a single material workpiece to form a single component, and can achieve the required precision, flatness and yield of the rotor structure only by one-time processing, thereby eliminating the risk of the rotor shell hole breakage and poor flatness caused by laser welding and punch forming in the current thin fan and thin motor manufacturing process, increasing the overall manufacturing process stability, reducing the assembly process and reducing the manufacturing and inspection cost.
In addition, the surface of the rotor structure can be provided with a plurality of groove structures, dynamic embossing or thrust lines by using a secondary turning mode, and the thin fan and the thin motor are enabled to increase the capability of preventing oil leakage by virtue of the design of an oil layer, so that the operation efficiency and the service life of the thin fan and the thin motor are improved.
The foregoing is by way of example only, and not limiting. Any equivalent modifications or variations without departing from the spirit and scope of the present invention should be included in the scope of the appended claims.

Claims (11)

1. A low profile fan, comprising:
a fan frame; and
a driving device, which is arranged in the fan frame, and comprises:
a stator structure including a stator magnetic pole set and a base, wherein the base is connected with the fan frame, and the stator magnetic pole set is arranged at the outer edge of the base; and
a rotor structure, correspond the setting with this stator structure, this rotor structure includes:
a rotor shell, a columnar rotating shaft is formed in the center of the rotor shell and extends into the seat body, wherein the rotor shell and the rotating shaft are made of a single material workpiece by turning or molding into a seamless integrated single component;
the magnetic structure is arranged on the inner wall of the rotor shell and is magnetically driven by the stator magnetic pole group to drive the rotor shell to rotate; and
an impeller connected to the rotor case;
the rotor shell and the rotating shaft are made of pure metal materials or alloy materials with the same material, and the rotor shell and the rotating shaft are turned once; the rotor case further includes: the protruding structure is arranged on the other surface of the rotor shell opposite to the rotating shaft and corresponds to the rotating shaft, and the protruding structure, the rotor shell and the rotating shaft are made of a single workpiece which is made of a single material and are turned into a seamless integrated single component;
the surface of the rotating shaft is further provided with a plurality of groove structures, wherein the groove structures are annular grooves, oblique lines, V-shaped lines or U-shaped lines.
2. The thin fan as claimed in claim 1, wherein the maximum height of the fan frame is not more than 5 mm.
3. The thin fan as claimed in claim 1, wherein the rotor case further comprises:
and the oil seal cover is arranged on the rotor shell and surrounds the outer edge of the rotating shaft, and the oil seal cover is arranged corresponding to the seat body.
4. The thin fan as claimed in claim 1, wherein the protruding structure has a shape of a pillar, an arc, a hemisphere or a cone.
5. The thin fan as claimed in claim 1, wherein the rotor case has a plurality of dynamic embossing patterns or thrust lines on a surface thereof facing the stator structure and opposite to the housing.
6. A thin fan in accordance with claim 1 wherein the rotor casing faces the surface of the stator structure and forms a layer of oil repellent with respect to the housing.
7. A slim motor comprising:
a motor housing; and
a drive device disposed in the motor housing, the drive device comprising:
a stator structure including a stator magnetic pole set and a base, wherein the base is connected with the motor shell, and the stator magnetic pole set is arranged at the outer edge of the base; and
a rotor structure, correspond with this stator structure and set up, this rotor structure includes:
a rotor shell, a columnar rotating shaft is formed in the center of the rotor shell, one end of the rotating shaft extends into the seat body, wherein the rotor shell and the rotating shaft are made of a single material workpiece by turning or molding into a seamless integrated single component; and
the magnetic structure is arranged on the inner wall of the rotor shell and is magnetically driven by the stator magnetic pole group to drive the rotor shell to rotate;
the rotor shell and the rotating shaft are made of pure metal materials or alloy materials with the same material, and the rotor shell and the rotating shaft are turned once; the rotor case further includes: the protruding structure is arranged on the other surface of the rotor shell opposite to the rotating shaft and corresponds to the rotating shaft, and the protruding structure, the rotor shell and the rotating shaft are made of a single workpiece which is made of a single material and are turned into a seamless integrated single component;
the surface of the rotating shaft is further provided with a plurality of groove structures, wherein the groove structures are annular grooves, oblique lines, V-shaped lines or U-shaped lines.
8. The thin motor as claimed in claim 7, wherein the maximum height of the motor housing is not more than 5 mm.
9. The slim motor of claim 7, wherein the rotor case further comprises:
and the oil seal cover is arranged on the rotor shell and surrounds the outer edge of the rotating shaft, and the oil seal cover is arranged corresponding to the seat body.
10. The thin motor as claimed in claim 7, wherein the rotor housing has a plurality of dynamic embossing or thrust lines on a surface thereof facing the stator structure and opposite to the housing.
11. The thin motor as claimed in claim 7, wherein a layer of oil repellent is formed on a surface of the rotor case facing the stator structure with respect to the housing.
CN202211165223.4A 2017-02-14 2017-06-26 Thin fan and thin motor Pending CN115528837A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US201762458688P 2017-02-14 2017-02-14
US62/458,688 2017-02-14
CN201710494155.9A CN108425865A (en) 2017-02-14 2017-06-26 Thin fan and thin motor

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
CN201710494155.9A Division CN108425865A (en) 2017-02-14 2017-06-26 Thin fan and thin motor

Publications (1)

Publication Number Publication Date
CN115528837A true CN115528837A (en) 2022-12-27

Family

ID=84700468

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202211165223.4A Pending CN115528837A (en) 2017-02-14 2017-06-26 Thin fan and thin motor

Country Status (1)

Country Link
CN (1) CN115528837A (en)

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