US20070188026A1 - Damping structure for a rotor assembly of a motor - Google Patents

Damping structure for a rotor assembly of a motor Download PDF

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Publication number
US20070188026A1
US20070188026A1 US11/343,676 US34367606A US2007188026A1 US 20070188026 A1 US20070188026 A1 US 20070188026A1 US 34367606 A US34367606 A US 34367606A US 2007188026 A1 US2007188026 A1 US 2007188026A1
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United States
Prior art keywords
rotor
holes
damping
damping structure
side board
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.)
Abandoned
Application number
US11/343,676
Inventor
Rong-Hua Bi
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.)
Zhongshan Broad Ocean Motor Co Ltd
Original Assignee
Zhongshan Broad Ocean Motor 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 Zhongshan Broad Ocean Motor Co Ltd filed Critical Zhongshan Broad Ocean Motor Co Ltd
Priority to US11/343,676 priority Critical patent/US20070188026A1/en
Assigned to ZHONGSHAN BROAD-OCEAN MOTOR CO., LTD. reassignment ZHONGSHAN BROAD-OCEAN MOTOR CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BI, Rong-hua
Publication of US20070188026A1 publication Critical patent/US20070188026A1/en
Priority to US12/170,520 priority patent/US7659645B2/en
Abandoned 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
    • H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
    • H02K1/30—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures using intermediate parts, e.g. spiders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
    • F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
    • F16F15/08—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with rubber springs ; with springs made of rubber and metal

Definitions

  • the present invention relates to a damping structure, and more particularly to a damping structure for a rotor assembly of a motor so that the vibration of the rotor assembly resulted from the high frequency resonance of current is reduced.
  • a rotor assembly and an axle of a motor are two isolated parts.
  • the axle When the axle is extended into the rotor assembly, there is no connector sandwiched therebetween. Therefore, when the rotor assembly is rotated due to the induced current from the variation of magnetic field, the rotation of the rotor assembly is not smooth due to the high frequency resonance of the induced current. As such, the operation of the axle generates noises and may even cause hazardous resonance. Adding damping elements between the rotor assembly and the axle does do the job of reducing the noise. However, the damping elements are complicated and expensive
  • the present invention tends to provide an improved damping structure to mitigate the aforementioned problems.
  • the primary objective of the present invention is to provide a damping structure for a rotor assembly of a motor to damp out the vibration caused by the high frequency resonance of current.
  • the damping structure of the present invention includes multiple first holes defined in a rotor, second holes defined through side boards respectively mounted on opposite sides of the rotor and damping elements sandwiched between the side board and the rotor each damping element provided with third holes aligned with the second holes of the side board and the first holes of the rotor so that after the axle is extended through the side boards, the damping elements and the rotor, positioning pins are able to extend through the aligned first holes, second holes and the third holes to secure engagement between the side boards and the rotor.
  • a further objective of the present invention is that the damping element is a rubber ring and the third holes are defined in the rubber ring.
  • the positioning pins are made of rubber so that the positioning pins are able to directly extended into the aligned first holes and the second holes to secure engagement between the rotor and the side boards and to damp away the vibration caused by the operation of the rotor.
  • FIG. 1 is a schematic side plan view showing parts of the damping structure of the present invention to be applied to a rotor assembly which has an axle extending through the damping assembly;
  • FIG. 2 is a schematic cross sectional view showing the assembly of the damping structure with the rotor assembly
  • FIG. 3 is a cross sectional view taken from line 3 - 3 of FIG. 2 .
  • the damping structure in accordance with the present invention is applied to a rotor assembly including a rotor ( 2 ) incorporated with an axle ( 1 ) extending through the rotor ( 2 ).
  • a side board ( 3 ) is provided on opposite sides of the rotor ( 2 ) to secure the axle ( 1 ) inside the rotor ( 2 ).
  • the damping structure of the present invention includes first holes ( 21 ) defined in the rotor ( 2 ), second holes ( 31 ) defined in each of the side boards ( 3 ) and third holes ( 61 ) defined in damping elements ( 6 ) which are sandwiched between the side board ( 3 ) and the rotor ( 2 ).
  • positioning pins ( 5 ) are provided to extend through the side board, the damping element ( 6 ) and the rotor ( 2 ) to secure position of the damping elements ( 6 ) between the side board ( 3 ) and the rotor ( 2 ).
  • the second holes ( 31 ) are aligned with the third holes ( 61 ) which in turn align with the first holes ( 21 ) such that the positioning pins ( 5 ) are able to extend through the aligned first holes ( 21 ), the second holes ( 31 ) and the third holes ( 61 ) to assemble the rotor assembly after the axle ( 1 ) is first extended through the side board ( 3 ), the damping element ( 6 ) and the rotor ( 2 ).
  • the damping element ( 6 ) in this embodiment is a rubber sleeve inserted into a corresponding one of the first holes ( 21 ) of the rotor ( 2 ).
  • a quantity of the first holes is between 2 ⁇ 60.
  • the positioning pins ( 5 ) may be made of metal or rubber. When the positioning pins ( 5 ) are made of rubber, it is noted that the damping element ( 6 ) may be omitted.
  • the rubber sleeves are interconnected via a rubber ring and the third holes ( 61 ) are still defined in the rubber sleeves to allow the extension of the positioning pins ( 5 ) into the rotor ( 2 ).

Abstract

A damping structure for a rotor assembly includes holes defined in a rotor and in a side board respectively and damping elements inserted into the holes of the rotor to be located between the rotor and the side board. Each damping element is received in a corresponding to one of the holes of the rotor and the side board so as to absorb vibration from the rotor to the axle of the rotor assembly.

Description

    BACKGROUND OF THE INVENTION
  • 1. Field of the Invention
  • The present invention relates to a damping structure, and more particularly to a damping structure for a rotor assembly of a motor so that the vibration of the rotor assembly resulted from the high frequency resonance of current is reduced.
  • 2. Description of the Prior Art
  • A rotor assembly and an axle of a motor are two isolated parts. When the axle is extended into the rotor assembly, there is no connector sandwiched therebetween. Therefore, when the rotor assembly is rotated due to the induced current from the variation of magnetic field, the rotation of the rotor assembly is not smooth due to the high frequency resonance of the induced current. As such, the operation of the axle generates noises and may even cause hazardous resonance. Adding damping elements between the rotor assembly and the axle does do the job of reducing the noise. However, the damping elements are complicated and expensive
  • To overcome the shortcomings, the present invention tends to provide an improved damping structure to mitigate the aforementioned problems.
    • SUMMARY OF THE INVENTION
  • The primary objective of the present invention is to provide a damping structure for a rotor assembly of a motor to damp out the vibration caused by the high frequency resonance of current.
  • In one aspect of the present invention, the damping structure of the present invention includes multiple first holes defined in a rotor, second holes defined through side boards respectively mounted on opposite sides of the rotor and damping elements sandwiched between the side board and the rotor each damping element provided with third holes aligned with the second holes of the side board and the first holes of the rotor so that after the axle is extended through the side boards, the damping elements and the rotor, positioning pins are able to extend through the aligned first holes, second holes and the third holes to secure engagement between the side boards and the rotor.
  • A further objective of the present invention is that the damping element is a rubber ring and the third holes are defined in the rubber ring.
  • Still a further objective of the present invention is that the positioning pins are made of rubber so that the positioning pins are able to directly extended into the aligned first holes and the second holes to secure engagement between the rotor and the side boards and to damp away the vibration caused by the operation of the rotor.
  • Other objects, advantages and novel features of the invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • FIG. 1 is a schematic side plan view showing parts of the damping structure of the present invention to be applied to a rotor assembly which has an axle extending through the damping assembly;
  • FIG. 2 is a schematic cross sectional view showing the assembly of the damping structure with the rotor assembly; and
  • FIG. 3 is a cross sectional view taken from line 3-3 of FIG. 2.
    • DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
  • With reference to FIGS. 1 and 2, it is noted that the damping structure in accordance with the present invention is applied to a rotor assembly including a rotor (2) incorporated with an axle (1) extending through the rotor (2). A side board (3) is provided on opposite sides of the rotor (2) to secure the axle (1) inside the rotor (2). The damping structure of the present invention includes first holes (21) defined in the rotor (2), second holes (31) defined in each of the side boards (3) and third holes (61) defined in damping elements (6) which are sandwiched between the side board (3) and the rotor (2). In addition, positioning pins (5) are provided to extend through the side board, the damping element (6) and the rotor (2) to secure position of the damping elements (6) between the side board (3) and the rotor (2).
  • With reference to FIG. 2, it is noted that the second holes (31) are aligned with the third holes (61) which in turn align with the first holes (21) such that the positioning pins (5) are able to extend through the aligned first holes (21), the second holes (31) and the third holes (61) to assemble the rotor assembly after the axle (1) is first extended through the side board (3), the damping element (6) and the rotor (2). Preferably, the damping element (6) in this embodiment is a rubber sleeve inserted into a corresponding one of the first holes (21) of the rotor (2). Preferably, a quantity of the first holes is between 2˜60. Furthermore, the positioning pins (5) may be made of metal or rubber. When the positioning pins (5) are made of rubber, it is noted that the damping element (6) may be omitted.
  • With reference to FIG. 3, it is noted that the rubber sleeves are interconnected via a rubber ring and the third holes (61) are still defined in the rubber sleeves to allow the extension of the positioning pins (5) into the rotor (2).
  • As a consequence of the provision of the damping structure to the rotor assembly, it is noted that when the outer rotor (2) is rotated and vibrated due to the high frequency resonance from the current, because the damping structure, i.e. the rubber sleeves (6) in the first holes (21) of the rotor (2), exists between the rotor (2) and the side boards (3), the vibration from the rotor (2) is effectively damped so that the force transmitted to the axle (1) is smooth and thus noise generated by the axle (1) is effectively reduced.
  • It is to be understood, however, that even though numerous characteristics and advantages of the present invention have been set forth in the foregoing description, together with details of the structure and function of the invention, the disclosure is illustrative only, and changes may be made in detail, especially in matters of shape, size, and arrangement of parts within the principles of the invention to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed.

Claims (10)

1. A damping structure for a rotor assembly having a rotor and an axle extending through the rotor, the damping structure comprising:
first holes adapted to be defined in the rotor;
a first side board provided on one side of the rotor and the first side board having second holes in communication with the first holes of the rotor;
damping elements sandwiched between the first side board and the rotor and each damping element having third holes in communication with the first holes of the rotor; and
positioning pins extending through the second holes of the first side board, the third holes of the damping elements and the first holes of the rotor to secure position of the damping elements between the side board and the rotor such that vibration caused by rotation of the rotor is effectively reduced.
2. The damping structure as claimed in claim 1, wherein the damping elements include a plurality of rubber sleeves respectively inserted into a corresponding one of the first holes of the rotor.
3. The damping structure as claimed in claim 2 further comprising a second side board provided to sandwich the damping elements with the rotor and being opposite to the first side board in relation to the rotor.
4. The damping structure as claimed in claim 1 further comprising a rubber ring interconnecting the damping elements.
5. The damping structure as claimed in claim 2 further comprising a rubber ring interconnecting the damping elements.
6. The damping structure as claimed in claim 3 further comprising a rubber ring interconnecting the damping elements.
7. The damping structure as claimed in claim 3, wherein a quantity of the first holes is between 2˜60.
8. The damping structure as claimed in claim 4, wherein a quantity of the holes is between 2˜60.
9. The damping structure as claimed in claim 5, wherein a quantity of the holes is between 2˜60.
10. The damping structure as claimed in claim 6, wherein a quantity of the holes is between 2˜60.
US11/343,676 2006-01-31 2006-01-31 Damping structure for a rotor assembly of a motor Abandoned US20070188026A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US11/343,676 US20070188026A1 (en) 2006-01-31 2006-01-31 Damping structure for a rotor assembly of a motor
US12/170,520 US7659645B2 (en) 2006-01-31 2008-07-10 Vibration-damping rotor assembly

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US11/343,676 US20070188026A1 (en) 2006-01-31 2006-01-31 Damping structure for a rotor assembly of a motor

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US12/170,520 Continuation US7659645B2 (en) 2006-01-31 2008-07-10 Vibration-damping rotor assembly

Publications (1)

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US20070188026A1 true US20070188026A1 (en) 2007-08-16

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US11/343,676 Abandoned US20070188026A1 (en) 2006-01-31 2006-01-31 Damping structure for a rotor assembly of a motor
US12/170,520 Active US7659645B2 (en) 2006-01-31 2008-07-10 Vibration-damping rotor assembly

Family Applications After (1)

Application Number Title Priority Date Filing Date
US12/170,520 Active US7659645B2 (en) 2006-01-31 2008-07-10 Vibration-damping rotor assembly

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080247874A1 (en) * 2007-04-05 2008-10-09 Acre James A Dual flow fan heat sink application
CN103051087A (en) * 2011-10-14 2013-04-17 三菱电机株式会社 Rotor of rotary electric machine
US20140084726A1 (en) * 2012-09-25 2014-03-27 Stephen J. Burton Capless mounting for motor
US8732927B2 (en) 2011-09-20 2014-05-27 General Electric Company Method for adjusting torsional frequency of a power train
US20140260781A1 (en) * 2013-03-15 2014-09-18 General Electric Company Torsional mode shifting
US20160010721A1 (en) * 2013-03-15 2016-01-14 General Electric Company Torsional resonance frequency adjustor
EP3029353A1 (en) * 2014-12-05 2016-06-08 Industria de Turbo Propulsores S.A. Vibration damping system
CN113481653A (en) * 2021-06-08 2021-10-08 福建屹立智能化科技有限公司 Mounting structure of power mechanism of warp knitting machine

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US7986068B2 (en) * 2008-06-18 2011-07-26 Honda Motor Co., Ltd. Motor
US8141614B2 (en) * 2009-07-01 2012-03-27 Harmonic Design Expanding coupling means for powered window covering
CN201947080U (en) * 2011-01-28 2011-08-24 中山大洋电机制造有限公司 Rotor structure of brushless motor
CN103855850B (en) * 2012-12-05 2017-03-15 珠海格力电器股份有限公司 The damping device and household electrical appliance of motor
JP5920319B2 (en) * 2013-11-21 2016-05-18 株式会社デンソー Rotor fixing structure and rotating electric machine
US9966829B2 (en) 2015-11-24 2018-05-08 Lin Engineering, Inc. Reduced-vibration stepper motor
CN107425643A (en) * 2016-05-24 2017-12-01 德昌电机(深圳)有限公司 Motor and the fluid delivery system using the motor
EP3480415A3 (en) 2017-10-09 2019-07-24 Hunter Douglas Inc. Head rail assemblies for architectural coverings and related methods

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US2207251A (en) * 1938-07-30 1940-07-09 Rca Corp Electric motor
US4590814A (en) * 1980-10-14 1986-05-27 Wadensten Theodore S Vibration dampening apparatus for motor actuated eccentric forces
US6045112A (en) * 1997-08-20 2000-04-04 Calsonic North America, Inc. Vibration isolation system for an electric motor
US20040084984A1 (en) * 2001-03-30 2004-05-06 Sanyo Electric Co., Ltd. Synchronous induction motor and manufacturing method and drive unit for the same, and hermetic electric compressor
US20040124720A1 (en) * 2000-11-24 2004-07-01 Moteurs Leroy-Somer Stator for a rotary electric machine
US20040207274A1 (en) * 2003-02-12 2004-10-21 Robert Bosch Gmbh External rotor motor

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JPH01157565U (en) * 1988-04-12 1989-10-31
US5704111A (en) * 1995-05-24 1998-01-06 General Electric Company Method for making a rotor for an electric motor

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Publication number Priority date Publication date Assignee Title
US2207251A (en) * 1938-07-30 1940-07-09 Rca Corp Electric motor
US4590814A (en) * 1980-10-14 1986-05-27 Wadensten Theodore S Vibration dampening apparatus for motor actuated eccentric forces
US6045112A (en) * 1997-08-20 2000-04-04 Calsonic North America, Inc. Vibration isolation system for an electric motor
US20040124720A1 (en) * 2000-11-24 2004-07-01 Moteurs Leroy-Somer Stator for a rotary electric machine
US20040084984A1 (en) * 2001-03-30 2004-05-06 Sanyo Electric Co., Ltd. Synchronous induction motor and manufacturing method and drive unit for the same, and hermetic electric compressor
US20040207274A1 (en) * 2003-02-12 2004-10-21 Robert Bosch Gmbh External rotor motor

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080247874A1 (en) * 2007-04-05 2008-10-09 Acre James A Dual flow fan heat sink application
US8732927B2 (en) 2011-09-20 2014-05-27 General Electric Company Method for adjusting torsional frequency of a power train
US10030734B2 (en) 2011-09-20 2018-07-24 General Electric Company System for adjusting torsional frequency of a power train
CN103051087A (en) * 2011-10-14 2013-04-17 三菱电机株式会社 Rotor of rotary electric machine
US20140084726A1 (en) * 2012-09-25 2014-03-27 Stephen J. Burton Capless mounting for motor
US8890384B2 (en) * 2012-09-25 2014-11-18 Nidec Motor Corporation Capless mounting for motor
US20140260781A1 (en) * 2013-03-15 2014-09-18 General Electric Company Torsional mode shifting
US20160010721A1 (en) * 2013-03-15 2016-01-14 General Electric Company Torsional resonance frequency adjustor
US9366313B2 (en) * 2013-03-15 2016-06-14 General Electric Company Torsional resonance frequency adjustor
US9551398B2 (en) * 2013-03-15 2017-01-24 General Electric Company Torsional mode shifting
EP3029353A1 (en) * 2014-12-05 2016-06-08 Industria de Turbo Propulsores S.A. Vibration damping system
CN113481653A (en) * 2021-06-08 2021-10-08 福建屹立智能化科技有限公司 Mounting structure of power mechanism of warp knitting machine

Also Published As

Publication number Publication date
US20080265698A1 (en) 2008-10-30
US7659645B2 (en) 2010-02-09

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Legal Events

Date Code Title Description
AS Assignment

Owner name: ZHONGSHAN BROAD-OCEAN MOTOR CO., LTD., CHINA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:BI, RONG-HUA;REEL/FRAME:017524/0772

Effective date: 20060124

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION