US20020109421A1 - Rotor assembly of brushless direct current motor - Google Patents

Rotor assembly of brushless direct current motor Download PDF

Info

Publication number
US20020109421A1
US20020109421A1 US09/781,974 US78197401A US2002109421A1 US 20020109421 A1 US20020109421 A1 US 20020109421A1 US 78197401 A US78197401 A US 78197401A US 2002109421 A1 US2002109421 A1 US 2002109421A1
Authority
US
United States
Prior art keywords
rotor
direct current
current motor
brushless direct
rotor assembly
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.)
Granted
Application number
US09/781,974
Other versions
US6462441B1 (en
Inventor
Alex Horng
Tso-Kuo Yin
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.)
Sunonwealth Electric Machine Industry Co Ltd
Original Assignee
Sunonwealth Electric Machine Industry Co Ltd
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 Sunonwealth Electric Machine Industry Co Ltd filed Critical Sunonwealth Electric Machine Industry Co Ltd
Priority to US09/781,974 priority Critical patent/US6462441B1/en
Assigned to SUNONWEALTH ELECTRIC MACHINE INDUSTRY CO., LTD. reassignment SUNONWEALTH ELECTRIC MACHINE INDUSTRY CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HORNG, ALEX, YIN, TSO-KUO
Publication of US20020109421A1 publication Critical patent/US20020109421A1/en
Application granted granted Critical
Publication of US6462441B1 publication Critical patent/US6462441B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Classifications

    • 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
    • H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
    • H02K5/173—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings
    • H02K5/1737—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings radially supporting the rotor around a fixed spindle; radially supporting the rotor directly
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
    • H02K21/24—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets axially facing the armatures, e.g. hub-type cycle dynamos
    • 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
    • H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans

Definitions

  • the present invention relates to a rotor assembly of a brushless direct. current motor, wherein the rotor can be conveniently assembled and fixed.
  • a conventional brushless direct current motor of axial winding radial air gap in accordance with the prior art shown in FIG. 6 comprises a metallic axle tube 91 combined on a housing 90 .
  • the metallic axle tube 91 has an outer diameter combined with a circuit board 92 , a coil 93 , and pole plates 94 .
  • the metallic axle tube 91 has an inner diameter for combination with an oil-impregnated bearing 95 or a positioning bushing and a ball bearing, and a rotor has a magnet ring 96 to induce with the coil 93 to rotate.
  • the objective of the present invention is to provide a rotor assembly of a brushless direct current motor, wherein the rotor can be conveniently assembled so that the brushless direct current motor can be manufactured and assembled more easily.
  • the present invention essentially includes a body provided with a circuit board, a pole plate, a coil, and a shaft base.
  • the shaft base is provided with a positioning hole having a threaded portion by which a fixing member can be combined with a rotor.
  • the rotor is provided with a countersunk seat in which a bearing is placed.
  • the bearing has an axial hole for allowing passage of the fixing member so as to fix it.
  • the rotor takes the fixing member as a center so as to rotate by a permanent magnet inducing with the coil.
  • FIG. 1 is an exploded perspective view of a rotor assembly of a brushless direct current motor in accordance with a first embodiment of the present invention
  • FIG. 2 is a front plan cross-sectional assembly view of the rotor assembly of a brushless direct current motor as shown in FIG. 1;
  • FIG. 3 is a front plan cross-sectional assembly view of a rotor assembly of a brushless direct current motor in accordance with a second embodiment of the present invention
  • FIG. 4 is an exploded perspective view of a rotor assembly of a brushless direct current motor in accordance with a third embodiment of the present invention.
  • FIG. 5 is a front plan cross-sectional assembly view of the rotor assembly of a brushless direct current motor as shown in FIG. 4;
  • FIG. 6 is a front plan cross-sectional assembly view of a conventional brushless direct current motor in accordance with the prior art.
  • FIGS. 1 and 2 a first preferred embodiment of the present invention is shown, wherein the embodiment is used in axial winding axial air gap.
  • the rotor assembly of a brushless direct current motor essentially comprises a body 1 , a rotor 2 , and a fixing member 3 .
  • the body 1 can be the housing of a conventional heat radiating fan.
  • the body 1 is combined with a circuit board 11 , a pole plate 12 , a coil 13 , and a shaft base 14 , and the shaft base 14 defines a positioning hole 16 having a threaded portion 15 .
  • the threaded portion 15 is located in the inner wall of the positioning hole 16 which is provided for combining with the fixing member 3 .
  • the rotor 2 can be the impeller of a conventional heat radiating fan.
  • the rotor 2 is provided with a countersunk seat 21 at the central position thereof.
  • the countersunk seat 21 defines a through hole 22 .
  • a bearing 23 is mounted in the countersunk seat 21 .
  • the bearing 23 is fixed by a retaining member 24 such as a C-shaped ring after being placed in the countersunk seat 21 of the rotor 2 .
  • the through hole 22 allows passage of the fixing member 3 that is rotatably mounted in the bearing 23 .
  • the rotor 2 itself is provided with conventional parts such as a permanent magnet 25 , and a blade 26 .
  • the fixing member 3 is formed with the shape of a bolt shank, and includes a cap head 31 having a diameter greater than that of the shank.
  • the shank includes a pivot portion 32 and a threaded portion 33 , wherein the pivot portion 32 is provided for combination with the bearing 23 , and the threaded portion 33 may be combined with the threaded portion 15 provided in the positioning hole 16 of the body 1 .
  • the top end face of the cap head 3 of the fixing member 3 may be provided with an “1” shaped or a cross-shaped slot 34 .
  • the fixing member 3 when the fixing member 3 passes through the bearing 23 that is fixed in the countersunk seat 21 provided on the rotor 2 , the fixing member 3 can be rotated so as to fit the rotor 2 on the body 1 .
  • the threading of the fixing member 3 can be adapted to has the same direction as that of the rotation of the rotor 2 , or an adhesive can be coated on the fixing member 3 and the threaded portion 15 , thereby preventing detachment of the fixing member 3 .
  • FIG. 3 a second preferred embodiment of the present invention is shown.
  • the shaft base 14 of the body 1 is provided with a fitting hole 17 that is concentric with the positioning hole 16 .
  • the fitting hole 17 is provided for receiving a nut 18 therein, and the nut 18 can be combined with the fixing member 3 by rotation.
  • the threading of the fixing member 3 can be adapted to has the same direction as that of the threading of the nut 18 , or an adhesive can be coated on the fixing member 3 and the nut 18 , thereby preventing detachment of the fixing member 3 .
  • FIG. 4 a third preferred embodiment of the present invention is shown, wherein the embodiment is used in axial winding radial air gap.
  • the rotor assembly of a brushless direct current motor comprises a body 4 , a rotor 5 , and a fixing member 6 .
  • the body 4 can be the housing of a conventional heat radiating fan.
  • the body 4 is provided with a column 44 .
  • the column 44 has an outer diameter fitted with a stator base 41 and a circuit board 42 .
  • the column 44 has an inner diameter for allowing passing and fixing of the fixing member 6 .
  • the inner wall of the column 44 can be provided with a threaded portion to mate with the fixing member 6 , or as shown in the figure, the inner diameter of the column 44 is formed with a stepped ring for receiving a positioning member 43 such as a nut 43 therein to combine with the fixing member 6 by rotation.
  • the rotor 5 can be the impeller of a conventional heat radiating fan.
  • the rotor 5 is provided with a countersunk seat 51 at the central position thereof.
  • the countersunk seat 51 defines a through hole 52 .
  • a bearing 53 is mounted in the countersunk seat 51 , and is fixed in place by a retaining member 54 such as a C-shaped ring.
  • the through hole 52 allows passage of the fixing member 6 that is rotatably mounted in the bearing 53 .
  • the rotor 5 itself is provided with conventional parts such as a permanent magnet 55 , and a blade 56 .
  • the fixing member 6 is formed with the shaped of a bolt shank and has a cap head 61 with a diameter greater than that of the shank.
  • the shank includes a pivot portion 62 , a combination portion 64 , and a threaded portion 63 , wherein the pivot portion 62 is provided for combination with the bearing 53 , the threaded portion 63 can be combined with the threaded portion provided on the column 44 of the body 2 or combined with the positioning member 43 , and the combination portion 64 can be used to combine with the stator base 41 .
  • the top end face of the cap head 61 of the fixing member 6 may be provided with an “1” shaped or a cross-shaped slot 65 .
  • the fixing member 6 when the fixing member 6 passes through the bearing 53 that is fixed in the countersunk seat 51 provided on the rotor 5 , the fixing member 6 can be rotated so as to fit the rotor 5 on the body 4 .
  • the threading of the fixing member 6 can be adapted to has the same direction as that of the rotation of the rotor 5 , or fixed by an adhesive, thereby preventing detachment of the fixing member 6 .
  • the rotor can be conveniently assembled simply by placing the bearing in the countersunk seat of the rotor, and fixing the rotor on the shaft seat of the body by the fixing member.
  • the present invention has the effects of convenient and rapid assembly.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Motor Or Generator Frames (AREA)
  • Brushless Motors (AREA)

Abstract

A rotor assembly of a brushless direct current motor includes a body provided with a circuit board, a pole plate, a coil, and a shaft base. The shaft base is provided with a positioning hole having a threaded portion by which a fixing member can be combined with a rotor. The rotor is provided with a countersunk seat in which a bearing is placed. The bearing has an axial hole for allowing passage of the fixing member so as to fix it. The rotor takes the fixing member as a center so as to rotate by a permanent magnet inducing with the coil.

Description

    BACKGROUND OF THE INVENTION
  • 1. Field of the Invention [0001]
  • The present invention relates to a rotor assembly of a brushless direct. current motor, wherein the rotor can be conveniently assembled and fixed. [0002]
  • 2. Description of the Related Prior Art [0003]
  • A conventional brushless direct current motor of axial winding radial air gap in accordance with the prior art shown in FIG. 6 comprises a [0004] metallic axle tube 91 combined on a housing 90. The metallic axle tube 91 has an outer diameter combined with a circuit board 92, a coil 93, and pole plates 94. The metallic axle tube 91 has an inner diameter for combination with an oil-impregnated bearing 95 or a positioning bushing and a ball bearing, and a rotor has a magnet ring 96 to induce with the coil 93 to rotate.
  • During assembly of the conventional brushless direct current motor, it takes a lot of time to assemble the [0005] metallic axle tube 91 with the circuit board 92, the coil 93, the pole plates 94, and the oil-impregnated bearing 95. In addition, it needs a proper tightness between the metallic axle tube 91 and the circuit board 92, the coil 93, the pole plates 94, and the oil-impregnated bearing 95, thereby causing inconvenience in fabrication and assembly.
    • SUMMARY OF THE INVENTION
  • The objective of the present invention is to provide a rotor assembly of a brushless direct current motor, wherein the rotor can be conveniently assembled so that the brushless direct current motor can be manufactured and assembled more easily. [0006]
  • The present invention essentially includes a body provided with a circuit board, a pole plate, a coil, and a shaft base. The shaft base is provided with a positioning hole having a threaded portion by which a fixing member can be combined with a rotor. The rotor is provided with a countersunk seat in which a bearing is placed. The bearing has an axial hole for allowing passage of the fixing member so as to fix it. The rotor takes the fixing member as a center so as to rotate by a permanent magnet inducing with the coil. [0007]
  • Further benefits and advantages of the present invention will become apparent after a careful reading of the detailed description with appropriate reference to the accompanying drawings.[0008]
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • FIG. 1 is an exploded perspective view of a rotor assembly of a brushless direct current motor in accordance with a first embodiment of the present invention; [0009]
  • FIG. 2 is a front plan cross-sectional assembly view of the rotor assembly of a brushless direct current motor as shown in FIG. 1; [0010]
  • FIG. 3 is a front plan cross-sectional assembly view of a rotor assembly of a brushless direct current motor in accordance with a second embodiment of the present invention; [0011]
  • FIG. 4 is an exploded perspective view of a rotor assembly of a brushless direct current motor in accordance with a third embodiment of the present invention; [0012]
  • FIG. 5 is a front plan cross-sectional assembly view of the rotor assembly of a brushless direct current motor as shown in FIG. 4; and [0013]
  • FIG. 6 is a front plan cross-sectional assembly view of a conventional brushless direct current motor in accordance with the prior art.[0014]
    • DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
  • Referring to FIGS. 1 and 2, a first preferred embodiment of the present invention is shown, wherein the embodiment is used in axial winding axial air gap. The rotor assembly of a brushless direct current motor essentially comprises a body [0015] 1, a rotor 2, and a fixing member 3.
  • The body [0016] 1 can be the housing of a conventional heat radiating fan. The body 1 is combined with a circuit board 11, a pole plate 12, a coil 13, and a shaft base 14, and the shaft base 14 defines a positioning hole 16 having a threaded portion 15. In the preferred embodiment, the threaded portion 15 is located in the inner wall of the positioning hole 16 which is provided for combining with the fixing member 3.
  • The [0017] rotor 2 can be the impeller of a conventional heat radiating fan. The rotor 2 is provided with a countersunk seat 21 at the central position thereof. The countersunk seat 21 defines a through hole 22. A bearing 23 is mounted in the countersunk seat 21. The bearing 23 is fixed by a retaining member 24 such as a C-shaped ring after being placed in the countersunk seat 21 of the rotor 2. The through hole 22 allows passage of the fixing member 3 that is rotatably mounted in the bearing 23. The rotor 2 itself is provided with conventional parts such as a permanent magnet 25, and a blade 26.
  • The [0018] fixing member 3 is formed with the shape of a bolt shank, and includes a cap head 31 having a diameter greater than that of the shank. The shank includes a pivot portion 32 and a threaded portion 33, wherein the pivot portion 32 is provided for combination with the bearing 23, and the threaded portion 33 may be combined with the threaded portion 15 provided in the positioning hole 16 of the body 1. For facilitating the rotation of the fixing member 3, the top end face of the cap head 3 of the fixing member 3 may be provided with an “1” shaped or a cross-shaped slot 34. Therefore, when the fixing member 3 passes through the bearing 23 that is fixed in the countersunk seat 21 provided on the rotor 2, the fixing member 3 can be rotated so as to fit the rotor 2 on the body 1. The threading of the fixing member 3 can be adapted to has the same direction as that of the rotation of the rotor 2, or an adhesive can be coated on the fixing member 3 and the threaded portion 15, thereby preventing detachment of the fixing member 3.
  • Referring to FIG. 3, a second preferred embodiment of the present invention is shown. The [0019] shaft base 14 of the body 1 is provided with a fitting hole 17 that is concentric with the positioning hole 16. The fitting hole 17 is provided for receiving a nut 18 therein, and the nut 18 can be combined with the fixing member 3 by rotation. The threading of the fixing member 3 can be adapted to has the same direction as that of the threading of the nut 18, or an adhesive can be coated on the fixing member 3 and the nut 18, thereby preventing detachment of the fixing member 3.
  • Referring to FIG. 4, a third preferred embodiment of the present invention is shown, wherein the embodiment is used in axial winding radial air gap. The rotor assembly of a brushless direct current motor comprises a [0020] body 4, a rotor 5, and a fixing member 6.
  • The [0021] body 4 can be the housing of a conventional heat radiating fan. The body 4 is provided with a column 44. The column 44 has an outer diameter fitted with a stator base 41 and a circuit board 42. The column 44 has an inner diameter for allowing passing and fixing of the fixing member 6. The inner wall of the column 44 can be provided with a threaded portion to mate with the fixing member 6, or as shown in the figure, the inner diameter of the column 44 is formed with a stepped ring for receiving a positioning member 43 such as a nut 43 therein to combine with the fixing member 6 by rotation.
  • The [0022] rotor 5 can be the impeller of a conventional heat radiating fan. The rotor 5 is provided with a countersunk seat 51 at the central position thereof. The countersunk seat 51 defines a through hole 52. A bearing 53 is mounted in the countersunk seat 51, and is fixed in place by a retaining member 54 such as a C-shaped ring. The through hole 52 allows passage of the fixing member 6 that is rotatably mounted in the bearing 53. The rotor 5 itself is provided with conventional parts such as a permanent magnet 55, and a blade 56.
  • The [0023] fixing member 6 is formed with the shaped of a bolt shank and has a cap head 61 with a diameter greater than that of the shank. The shank includes a pivot portion 62, a combination portion 64, and a threaded portion 63, wherein the pivot portion 62 is provided for combination with the bearing 53, the threaded portion 63 can be combined with the threaded portion provided on the column 44 of the body 2 or combined with the positioning member 43, and the combination portion 64 can be used to combine with the stator base 41. For facilitating the rotation of the fixing member 6, the top end face of the cap head 61 of the fixing member 6 may be provided with an “1” shaped or a cross-shaped slot 65. Therefore, when the fixing member 6 passes through the bearing 53 that is fixed in the countersunk seat 51 provided on the rotor 5, the fixing member 6 can be rotated so as to fit the rotor 5 on the body 4. The threading of the fixing member 6 can be adapted to has the same direction as that of the rotation of the rotor 5, or fixed by an adhesive, thereby preventing detachment of the fixing member 6.
    • EFFECT OF THE PRESENT INVENTION
  • In accordance with the brushless direct current motor of the present invention, the rotor can be conveniently assembled simply by placing the bearing in the countersunk seat of the rotor, and fixing the rotor on the shaft seat of the body by the fixing member. In general, the present invention has the effects of convenient and rapid assembly. [0024]
  • Although the invention has been explained in relation to its preferred embodiment as mentioned above, it is to be understood that many other possible modifications and variations can be made without departing from the scope of the present invention. It is, therefore, contemplated that the appended claim(s) will cover such modifications and variations that fall within the true scope of the invention. [0025]

Claims (14)

What is claimed is:
1. A rotor assembly of a brushless direct current motor comprising:
a body having a circuit board, a pole plate, a coil, and a shaft base, the shaft base defining a positioning hole;
a rotor provided with a countersunk seat, the countersunk seat defining a through hole, a bearing mounted in the countersunk seat, the rotor itself having a permanent magnet; and
a fixing member having a cap head with a larger diameter, a shank provided on the cap head, the shank rotatably mounted in the bearing, and combined in the positioning hole of the shaft seat.
2. The rotor assembly of a brushless direct current motor as claimed in claim 1, wherein the bearing is fixed by a retaining member after being placed in the countersunk seat of the rotor.
3. The rotor assembly of a brushless direct current motor as claimed in claim 1, wherein the rotor is provided with a blade.
4. The rotor assembly of a brushless direct current motor as claimed in claim 1, wherein the body is the housing of a heat radiating fan.
5. The rotor assembly of a brushless direct current motor as claimed in claim 1, wherein the positioning hole of the shaft seat is provided with a threaded portion.
6. The rotor assembly of a brushless direct current motor as claimed in claim 5, wherein the fixing member is formed with the shape of a bolt shank, and has a pivot portion and a threaded portion, the pivot portion is combined on the bearing, and the threaded portion is screwed and fixed in the positioning hole of the body.
7. A rotor assembly of a brushless direct current motor comprising:
a body having a circuit board, a pole plate, a coil, and a shaft base, the shaft base defining a fitting hole for receiving a nut therein;
a rotor provided with a countersunk seat, the countersunk seat defining a through hole, a bearing mounted in the countersunk seat, the rotor itself having a permanent magnet; and
a fixing member formed with the shaped of a bolt shank and having a cap head with a larger diameter, the shank itself having a pivot portion combined on the bearing, and a threaded portion combined with the nut placed in the fitting hole of the body.
8. The rotor assembly of a brushless direct current motor as claimed in claim 7, wherein the bearing is fixed by a retaining member after being placed in the countersunk seat of the rotor.
9. The rotor assembly of a brushless direct current motor as claimed in claim 7, wherein the rotor is provided with a blade.
10. The rotor assembly of a brushless direct current motor as claimed in claim 7, wherein the body is the housing of a heat radiating fan.
11. A rotor assembly of a brushless direct current motor comprising:
a body provided with a column, the column having an outer diameter fitted with a stator base and a circuit board, the column having an inner diameter formed with a stepped ring for receiving a positioning member therein;
a rotor provided with a countersunk seat, the countersunk seat defining a through hole, a bearing mounted in the countersunk seat, the rotor itself having a permanent magnet; and
a fixing member formed with the shaped of a bolt shank and having a cap head with a larger diameter, the shank itself having a pivot portion combined on the bearing, a combination portion combined with the stator base, and a threaded portion combined with the positioning member placed in the column of the body.
12. The rotor assembly of a brushless direct current motor as claimed in claim 11, wherein the bearing is fixed by a retaining member after being placed in the countersunk seat of the rotor.
13. The rotor assembly of a brushless direct current motor as claimed in claim 11, wherein the rotor is provided with a blade.
14. The rotor assembly of a brushless direct current motor as claimed in claim 11, wherein the body is the housing of a heat radiating fan.
US09/781,974 2001-02-14 2001-02-14 Rotor assembly of brushless direct current motor Expired - Fee Related US6462441B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US09/781,974 US6462441B1 (en) 2001-02-14 2001-02-14 Rotor assembly of brushless direct current motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US09/781,974 US6462441B1 (en) 2001-02-14 2001-02-14 Rotor assembly of brushless direct current motor

Publications (2)

Publication Number Publication Date
US20020109421A1 true US20020109421A1 (en) 2002-08-15
US6462441B1 US6462441B1 (en) 2002-10-08

Family

ID=25124526

Family Applications (1)

Application Number Title Priority Date Filing Date
US09/781,974 Expired - Fee Related US6462441B1 (en) 2001-02-14 2001-02-14 Rotor assembly of brushless direct current motor

Country Status (1)

Country Link
US (1) US6462441B1 (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6630758B2 (en) * 2000-05-11 2003-10-07 Nsk Ltd. Motor with a stationary shaft with formed knurled grooves on shaft and/or housing
US20090152965A1 (en) * 2007-12-18 2009-06-18 Alex Horng Winding Assembly for Motor
US20090295243A1 (en) * 2008-06-03 2009-12-03 Lawrence Leroy Kneisel Method for mounting an inner stator for a motor
WO2010027447A2 (en) * 2008-09-08 2010-03-11 Cts Corporation Brushless direct current actuator
US20100301691A1 (en) * 2009-05-27 2010-12-02 Douglas Edward Cors Brushless Direct Current Actuator with Clip for Retaining Bobbins
US20100308684A1 (en) * 2008-01-18 2010-12-09 Alex Horng Motor with Detacthable Winding Assemblies
US20110203769A1 (en) * 2010-02-24 2011-08-25 Douglas Edward Cors Cooling System for Actuator
US20130241332A1 (en) * 2012-03-19 2013-09-19 Samsung Electro-Mechanics Co., Ltd. Rotating member assembly and spindle motor including the same

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6858211B1 (en) * 1998-07-20 2005-02-22 The United States Of America As Represented By The Department Of Health And Human Services Vaccines against Escherichia coli O157 infection
US6747383B2 (en) * 2002-04-09 2004-06-08 Honeywell International, Inc. Generator with hydraulically mounted stator rotor
US6839234B2 (en) * 2002-05-15 2005-01-04 Matsushita Electric Industrial Co., Ltd. Cooling device and an electronic apparatus including the same
US7209355B2 (en) * 2002-05-15 2007-04-24 Matsushita Electric Industrial Co., Ltd. Cooling device and an electronic apparatus including the same
KR100512301B1 (en) * 2002-12-30 2005-09-02 삼성전기주식회사 Brushless vibration motor
US7168920B2 (en) * 2004-09-13 2007-01-30 Asia Vital Component Co., Ltd. Fan base case
TWI314184B (en) * 2005-03-18 2009-09-01 Delta Electronics Inc Fan case
CN100453819C (en) * 2005-03-18 2009-01-21 台达电子工业股份有限公司 Fan casing
CN100493318C (en) * 2005-11-08 2009-05-27 富准精密工业(深圳)有限公司 An integral liquid cooling heat radiator
TW200732565A (en) * 2006-02-21 2007-09-01 Sunonwealth Electr Mach Ind Co The structure of a small blower
US7541713B2 (en) * 2006-05-01 2009-06-02 Asia Viatal Components Co., Ltd. Heat sink
TWM332746U (en) * 2007-10-15 2008-05-21 Hsu Ting Wei Improved structure of blade fan
TWI440424B (en) * 2008-10-17 2014-06-01 Sunonwealth Electr Mach Ind Co Thin dissipating fan
CN204200626U (en) * 2014-10-27 2015-03-11 讯凯国际股份有限公司 There is the shaftless fan structure of axial air-gap

Family Cites Families (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2953417A (en) * 1958-07-31 1960-09-20 Horberg Grinding Ind Inc Precision adjustable bearing structure
US3164097A (en) * 1961-02-13 1965-01-05 Nicoll Walter Lyon Gordon Pumps
DE2102679C2 (en) * 1971-01-21 1982-12-30 Papst-Motoren GmbH & Co KG, 7742 St Georgen Small electric motor for a fan
SE357799B (en) * 1971-10-14 1973-07-09 Atlas Copco Ab
US4564335A (en) * 1979-10-06 1986-01-14 Papst-Motoren Gmbh & Co. Kg Axial flow fan
JPS6184683U (en) * 1984-11-07 1986-06-04
JPS6237044A (en) * 1985-08-05 1987-02-18 Kiyonori Fujisaki Small-sized fan motor
US5000589A (en) * 1989-06-30 1991-03-19 Kabushiki Kaisha Sankyo Seiki Seisakusho Bearing structures for motors
US5875067A (en) * 1991-03-22 1999-02-23 Seagate Technology, Inc. Acoustic isolator for a disc drive assembly
US5559382A (en) * 1992-10-01 1996-09-24 Nidec Corporation Spindle motor
JPH07177720A (en) * 1993-12-22 1995-07-14 Matsushita Electric Ind Co Ltd Brushless motor
JP3351111B2 (en) * 1994-08-08 2002-11-25 松下電器産業株式会社 Brushless motor
US5705917A (en) * 1994-09-14 1998-01-06 Coleman Powermate, Inc. Light weight machine with rotor employing permanent magnets and consequence poles
JP3786446B2 (en) * 1995-03-31 2006-06-14 松下電器産業株式会社 Blower
KR100203241B1 (en) * 1995-05-27 1999-06-15 윤종용 Changeable airgap motor
US5850318A (en) * 1995-06-06 1998-12-15 Seagate Technology, Inc. Slotless spindle motor for disc drive
JP3282945B2 (en) * 1995-06-07 2002-05-20 松下電器産業株式会社 Spindle motor
US5571004A (en) * 1995-10-02 1996-11-05 Thomas Industries Inc. Sliding vane rotor attachment
JP3681201B2 (en) * 1995-10-31 2005-08-10 富士通株式会社 Disk device and disk device assembly method
JP3364562B2 (en) * 1995-12-01 2003-01-08 ミネベア株式会社 Motor structure
JP2879206B2 (en) * 1996-02-19 1999-04-05 ミネベア株式会社 Axial fan motor
JP3395071B2 (en) * 1996-04-25 2003-04-07 ミネベア株式会社 Motor structure
US5883449A (en) * 1996-08-07 1999-03-16 Hunter Fan Company Ceiling fan motors
JPH1175340A (en) * 1997-06-17 1999-03-16 Nippon Densan Corp Motor
JP3023094B2 (en) * 1997-11-13 2000-03-21 三星電機株式会社 Single-phase disk type commutatorless DC motor
US6020660A (en) * 1997-12-10 2000-02-01 General Electric Company Dynamoelectric machine
US6186739B1 (en) * 1999-09-09 2001-02-13 Hsieh Hsin-Mao Support for a cooling fan
US6250884B1 (en) * 1999-11-15 2001-06-26 Ming-Chien Huang Ceiling fan
US6315529B1 (en) * 2000-05-04 2001-11-13 Tranyoung Technology Corp. Cooling fan with anti deflection arrangement
US6396178B1 (en) * 2001-01-04 2002-05-28 Meng-Yu Liu Wheel with a generator

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6630758B2 (en) * 2000-05-11 2003-10-07 Nsk Ltd. Motor with a stationary shaft with formed knurled grooves on shaft and/or housing
US20090152965A1 (en) * 2007-12-18 2009-06-18 Alex Horng Winding Assembly for Motor
US20100308684A1 (en) * 2008-01-18 2010-12-09 Alex Horng Motor with Detacthable Winding Assemblies
US20090295243A1 (en) * 2008-06-03 2009-12-03 Lawrence Leroy Kneisel Method for mounting an inner stator for a motor
WO2010027447A2 (en) * 2008-09-08 2010-03-11 Cts Corporation Brushless direct current actuator
US20100060092A1 (en) * 2008-09-08 2010-03-11 Blakesley Patrick B Brushless direct current actuator
WO2010027447A3 (en) * 2008-09-08 2010-11-25 Cts Corporation Brushless direct current actuator
US20100301691A1 (en) * 2009-05-27 2010-12-02 Douglas Edward Cors Brushless Direct Current Actuator with Clip for Retaining Bobbins
US8680727B2 (en) 2009-05-27 2014-03-25 Cts Corporation Brushless direct current actuator with clip for retaining bobbins
US20110203769A1 (en) * 2010-02-24 2011-08-25 Douglas Edward Cors Cooling System for Actuator
US20130241332A1 (en) * 2012-03-19 2013-09-19 Samsung Electro-Mechanics Co., Ltd. Rotating member assembly and spindle motor including the same
US8754555B2 (en) * 2012-03-19 2014-06-17 Samsung Electro-Mechanics Co., Ltd. Rotating member assembly and spindle motor including the same

Also Published As

Publication number Publication date
US6462441B1 (en) 2002-10-08

Similar Documents

Publication Publication Date Title
US6462441B1 (en) Rotor assembly of brushless direct current motor
US6525938B1 (en) Circuit board fixing structure of heatsink fan
US6916160B2 (en) Axial electric fan blower with electric components housing sealed from moisture, dirt and dust or other harmful gas
US7456541B2 (en) Fan device having an ultra thin-type structure with a minimum air gap for reducing an axial thickness
US20060138878A1 (en) Low profile d.c. brushless motor for an impeller mechanism or the like
US5982066A (en) Electric motor
JP2002039091A (en) Blower
US6565326B2 (en) Heat-dissipating fan structure
JPH0684781U (en) Brushless motor
US6538355B1 (en) Supporting structure for a rotor
JPH08275481A (en) Structure of motor
US6414411B1 (en) Supporting structure for a rotor
US20030132723A1 (en) Light generator for a rotatable object
JP3126341B2 (en) Axial fan rotor
JPH0312043Y2 (en)
JP2000014072A (en) Blower
JP3078135U (en) Brushless DC motor rotor assembly structure
JP2001054249A (en) Structure of spindle motor
JPH11107996A (en) Dc brushless axial flow heat sink fan motor
JP2596840B2 (en) DC brushless motor
JP2000345993A (en) Blower
US7538465B2 (en) Fan assembly and its housing
JP2957840B2 (en) Bicycle generator
JPH11223196A (en) Rotor of axial fan
JP2955757B2 (en) Disc type brushless motor

Legal Events

Date Code Title Description
AS Assignment

Owner name: SUNONWEALTH ELECTRIC MACHINE INDUSTRY CO., LTD., T

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:HORNG, ALEX;YIN, TSO-KUO;REEL/FRAME:011556/0105

Effective date: 20010206

FPAY Fee payment

Year of fee payment: 4

REMI Maintenance fee reminder mailed
LAPS Lapse for failure to pay maintenance fees
STCH Information on status: patent discontinuation

Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362

FP Lapsed due to failure to pay maintenance fee

Effective date: 20101008