US20050081573A1 - Washing machine - Google Patents

Washing machine Download PDF

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Publication number
US20050081573A1
US20050081573A1 US10/882,332 US88233204A US2005081573A1 US 20050081573 A1 US20050081573 A1 US 20050081573A1 US 88233204 A US88233204 A US 88233204A US 2005081573 A1 US2005081573 A1 US 2005081573A1
Authority
US
United States
Prior art keywords
magnet
shaft
washing machine
shaft pulley
washing
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
US10/882,332
Other languages
English (en)
Inventor
Jin Han
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.)
Samsung Electronics Co Ltd
Original Assignee
Samsung Electronics 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 Samsung Electronics Co Ltd filed Critical Samsung Electronics Co Ltd
Assigned to SAMSUNG ELECTRONICS CO. LTD. reassignment SAMSUNG ELECTRONICS CO. LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HAN, JIN CHUL
Publication of US20050081573A1 publication Critical patent/US20050081573A1/en
Abandoned legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
    • D06F37/30—Driving arrangements 
    • D06F37/304—Arrangements or adaptations of electric motors
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
    • D06F37/30—Driving arrangements 
    • D06F37/40—Driving arrangements  for driving the receptacle and an agitator or impeller, e.g. alternatively
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
    • D06F37/20—Mountings, e.g. resilient mountings, for the rotary receptacle, motor, tub or casing; Preventing or damping vibrations
    • 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
    • H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
    • H02K7/1004—Structural association with clutches, brakes, gears, pulleys or mechanical starters with pulleys

Definitions

  • the present invention relates, in general, to washing machines and, more particularly, to a washing machine capable of preventing a magnet, which is provided in a power transmission unit to detect a number of rotations of a washing shaft, from being removed from a predetermined position.
  • a washing machine is an appliance that washes laundry by rotating a rotary tub and/or a pulsator which are installed in a water tub, thus performing a washing operation, a rinsing operation, and a spin-drying operation.
  • the washing machine includes a cabinet, having a water tub to contain wash water therein located in the cabinet.
  • a rotary tub is rotatably set in the water tub.
  • the pulsator is installed in the rotary tub to agitate the laundry in the wash water.
  • the washing machine includes a drive motor and a power transmission unit.
  • the drive motor is provided under the water tub to drive the rotary tub and the pulsator.
  • a rotating force of the drive motor is transmitted to the power transmission unit via a belt.
  • the power transmission unit transmits the rotating force to the rotary tub and/or the pulsator.
  • the power transmission unit includes a washing shaft, a spin-drying shaft, and a clutch unit.
  • the washing shaft transmits the rotating force from the drive motor to the pulsator.
  • the spin-drying shaft transmits the rotating force from the drive motor to the rotary tub.
  • the clutch unit controls power transmission between the washing shaft and the spin-drying shaft, to allow the spin-drying shaft to selectively rotate.
  • the power transmission unit also includes a shaft pulley.
  • the shaft pulley is mounted to a lower end of the washing shaft, so that the rotating force is transmitted from the drive motor to the shaft pulley.
  • a magnet is provided at a predetermined position adjacent to the shaft pulley to rotate along with the shaft pulley.
  • a magnetic sensor senses a change in a magnetic field produced by the magnet, thus detecting a number of rotations of the washing shaft.
  • the magnet is secured to a predetermined position of the power transmission unit using an adhesive, and rotates along with the washing shaft.
  • the conventional washing machine has a problem in that a strength of the adhesive is weakened when vibrations caused by operations of the washing machine have been transmitted to the magnet for a lengthy period of time, and thereby the magnet may be removed from the predetermined position of the power transmission unit.
  • a washing machine comprising a drive motor to generate a rotating force, a washing shaft rotated by the drive motor, a belt and a shaft pulley to transmit the rotating force from the drive motor to the washing shaft, a magnet mounted on the shaft pulley to rotate along with the shaft pulley, and a locking unit mounted at a first end thereof to the magnet, and at a second end thereof to the shaft pulley, thus locking the magnet to the shaft pulley.
  • the shaft pulley comprises a through hole which axially extends through the shaft pulley.
  • the locking unit comprises a first locking part provided on the first end of the locking unit to be supported by the magnet, and a second locking part provided on the second end of the locking unit. The second locking part passes through the through hole of the shaft pulley to be supported by a portion around the through hole of the shaft pulley.
  • the magnet and the locking unit are formed of an annular shape to allow the washing shaft to pass through the magnet and the locking unit, and the magnet comprises a seating recess on an inner circumference thereof, wherein the first locking part of the locking unit is mounted on the seating recess.
  • the first locking part is projected from an outer circumferential surface of the locking unit, and the second locking part may extend toward a center of the locking unit.
  • the second locking part may be made of a material which is elastically deformed, so that the second locking part is elastically deformed when passing through the through hole, and elastically restores an original shape of the second locking part to be supported by the portion around the through hole of the shaft pulley after passing through the through hole.
  • FIG. 3 is an exploded perspective view of the rpm detecting unit of FIG. 2 .
  • a cylindrical brake drum 24 which stops the rotary tub 12 , is provided at a predetermined position of the spin-drying shafts 23 a and 23 b, and rotates along with the spin-drying shafts 23 a and 23 b.
  • a brake band 25 constituting a brake unit together with the brake drum 24 is provided on an outer surface of the brake drum 24 .
  • the drive motor 17 and the first washing shaft 21 comprise pulleys 17 a and 21 a, respectively.
  • the pulley mounted on the drive motor 17 is designated as a motor pulley 17 a
  • the pulley mounted on the first washing shaft 21 is designated as a shaft pulley 21 a.
  • the power transmission unit 20 further comprises a planetary reduction gear unit 40 , a clutch unit 50 , and housings 27 a and 27 b.
  • the planetary reduction gear unit 40 is installed in the brake drum 24 , and transmits the rotating force from the first washing shaft 21 to the second washing shaft 22 while reducing a speed of the first washing shaft 21 .
  • the clutch unit 50 is mounted to a lower end of the spin-drying shaft 23 b to control power transmission between the first washing shaft 21 and the spin-drying shaft 23 b.
  • the housings 27 a and 27 b are exteriorly mounted to the bottom of the water tub 11 , and rotatably support the spin-drying shafts 23 a and 23 b.
  • a brake lever 29 and a clutch lever 30 are provided at a side of the housings 27 a and 27 b, and are rotatably mounted to predetermined portions of a support pin 28 to operate the clutch unit 50 .
  • the brake lever 29 and the clutch lever 30 are constructed to operate in conjunction with the drain motor (not shown), to open the drain valve 15 b.
  • the housings 27 a and 27 b comprise an upper housing 27 a which is mounted to the bottom of the water tub 11 , and a lower housing 27 b which surrounds the brake drum 24 and is mounted at an upper end of the lower housing 27 b to the upper housing 27 a.
  • the spin-drying shafts 23 a and 23 b comprise an upper spin-drying shaft 23 a and a lower spin-drying shaft 23 b.
  • the upper spin-drying shaft 23 a is provided at an upper portion of the brake drum 24 , having an upper end thereof extending into the water tub 11 to be connected to the water tub 12 .
  • the lower spin-drying shaft 23 b is provided at a lower portion of the brake drum 24 .
  • the upper and lower spin-drying shafts 23 a and 23 b are rotatably supported by the upper and lower housings 27 a and 27 b using bearings 31 .
  • the first and second washing shafts 21 and 22 are rotatably supported by the lower and upper spin-drying shafts 23 b and 23 a, respectively, using a plurality of oilless bearings 32 .
  • the first washing shaft 21 is mounted, at a lower end thereof, to the shaft pulley 21 a so that the power is transmitted from the drive motor 17 to the first washing shaft 21 , with an upper end of the first washing shaft 21 extending into the brake drum 24 .
  • the second washing shaft 22 extends, at a lower end thereof, into the brake drum 24 , while extending, at an upper end thereof, into the rotary tub 12 to be connected to the pulsator 16 .
  • the planetary reduction gear unit 40 installed in the brake drum 24 comprises a sun gear 41 , a plurality of planetary gears 42 , an internal gear 43 , and a carrier 44 .
  • the sun gear 41 is provided on the upper end of the first washing shaft 21 .
  • the plurality of planetary gears 42 are arranged around the sun gear 41 .
  • the internal gear 43 is provided on an inner surface of the brake drum 24 .
  • the carrier 44 is mounted to the lower end of the second washing shaft 22 . In this case, each of the planetary gears 42 engages, at a first side thereof, with the sun gear 41 , while engaging, at a second side thereof, with the internal gear 43 .
  • a planetary gear shaft 45 to support each of the planetary gears 42 is supported by the carrier 44 and revolves around the sun gear 41 .
  • the above-mentioned construction allows the plurality of planetary gears 42 to rotate on their own central axes together with the sun gear 41 while revolving along the internal gear 43 .
  • the carrier 44 connected to the plurality of planetary gears 42 via the planetary gear shafts 45 rotates at a revolving speed of the plurality of planetary gears 42 , thus rotating the second washing shaft 22 while reducing a speed of the second washing shaft 22 .
  • the clutch unit 50 which controls the power transmission between the lower spin-drying shaft 23 b and the first washing shaft 21 , includes a transmission member 51 and a clutch spring 53 .
  • the transmission member 51 comprises a same diameter as an outer diameter of the lower spin-drying shaft 23 b, and is mounted to an outer surface of the first washing shaft 21 to be adjacent to a bottom of the lower spin-drying shaft 23 b.
  • the clutch spring 53 is formed of a coil shape to wrap around outer surfaces of the lower spin-drying shaft 23 b and the transmission member 51 .
  • a cylindrical sleeve 54 is provided on an outer surface of the clutch spring 53 .
  • the washing machine comprises an rpm detecting unit 60 to detect a number of rotations of the washing shaft.
  • the magnet 61 is mounted to the shaft pulley 21 a, and is formed of an annular shape to allow the first washing shaft 21 to pass through the magnet 61 and to be mounted to the shaft pulley 21 . Further, the magnet 61 is provided so that north and south poles thereof are alternately arranged in a circumferential direction of the magnet 61 . Thus, as the magnet 61 rotates, a magnetic field sensed by the magnetic sensor 62 is changed.
  • the locking unit 63 comprises first and second locking parts 63 a and 63 b.
  • the first locking parts 63 a are projected from an outer circumferential surface of a first end of the locking unit 63 to be supported by the magnet 61
  • the second locking parts 63 b are provided on a second end of the locking unit 63 to extend toward a center of the locking unit 63 .
  • the second locking parts 63 b are elastically deformed when passing through the through holes 21 b, and elastically restore original shapes thereof to be supported by edges around the through holes 21 b after passing through the through holes 21 b.
  • the magnet 61 comprises seating recesses 61 a on an inner circumference thereof, so that the first locking parts 63 a of the locking unit 63 located in the corresponding seating recesses 61 a of the magnet 61 .
  • the drain valve 15 b When a washing operation is performed, the drain valve 15 b, provided at a predetermined position under the water tub 11 , is closed. Further, because the clutch lever 30 operating in conjunction with the brake lever 29 rotates in a certain direction, and then is maintained at the rotated state by a coil spring 28 a fitted over the support pin 28 , the brake band 25 is tightened to limit a rotation of the brake drum 24 . At this time, the sleeve 54 rotated by the clutch lever 30 loosens the clutch spring 53 , so that there is no power transmission between the lower spin-drying shaft 23 b and the transmission member 51 .
  • a rinsing operation is performed. During the rinsing operation, water supply operations and water drain operations are executed several times. After the rinsing operation is completed, a spin-drying operation is performed. To execute the water drain operation, the drain valve 15 b is opened by the drain motor (not shown). At this time, the brake lever 29 and the clutch lever 30 operating in conjunction with the drain motor (not shown) are pulled, so that the brake band 25 is released, thereby releasing a brake of the brake drum 24 . Further, the sleeve 54 is released by the rotation of the clutch lever 30 .
  • the sleeve 54 rotates by an elastic force of the clutch spring 53 to restore an original state thereof, so that the clutch spring 53 tightens an outer surface of the transmission member 51 .
  • the transmission member 51 rotating along with the first washing shaft 21 , is connected to the lower spin-drying shaft 23 b via the clutch spring 53 .
  • the lower spin-drying shaft 23 b rotates together with the first washing shaft 21 .
  • the upper and lower spin-drying shafts 23 a and 23 b and the first and second washing shafts 21 and 22 simultaneously rotate, and thereby causing the pulsator 16 and the rotary tub 12 to rotate simultaneously, thus performing the spin-drying operation.
  • the sun gear 41 and the brake drum 24 rotate at a same speed, so that the planetary gears 42 revolve around the sun gear 41 while stopping rotating on their own central axes.
  • the second washing shaft 22 and the upper spin-drying shaft 23 a rotate at a same speed.
  • the clutch lever 30 is released by the operation of the drain motor (not shown). At this time, the brake band 25 is tightened by the rotation of the clutch lever 30 , thus applying the brake drum 24 . Further, the clutch spring 53 is loosened, thereby preventing the power from being transmitted to the lower spin-drying shaft 23 b.
  • the present invention provides a washing machine, which is constructed so that a magnet to detect a number of rotations of a washing shaft is mounted to a shaft pulley using a locking unit, to prevent the magnet from being removed from a predetermined position, even when vibrations caused by operations of the washing machine are transmitted to the magnet for a lengthy period of time.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Power Engineering (AREA)
  • Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
  • Control Of Washing Machine And Dryer (AREA)
US10/882,332 2003-10-20 2004-07-02 Washing machine Abandoned US20050081573A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR2003-72929 2003-10-20
KR1020030072929A KR20050037692A (ko) 2003-10-20 2003-10-20 세탁기

Publications (1)

Publication Number Publication Date
US20050081573A1 true US20050081573A1 (en) 2005-04-21

Family

ID=34510955

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/882,332 Abandoned US20050081573A1 (en) 2003-10-20 2004-07-02 Washing machine

Country Status (4)

Country Link
US (1) US20050081573A1 (zh)
JP (1) JP4083150B2 (zh)
KR (1) KR20050037692A (zh)
CN (1) CN1609332B (zh)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007000034A1 (en) * 2005-06-28 2007-01-04 Whirpool S.A. Driving arrangement for a laundry machine
US20080060388A1 (en) * 2006-09-13 2008-03-13 General Electric Company Washing machine having self-centering drive assembly
CN103201421A (zh) * 2010-12-02 2013-07-10 Lg电子株式会社 洗衣机
CN105063963A (zh) * 2015-08-05 2015-11-18 宁波普尔机电制造有限公司 洗衣机离合机构
US20160010265A1 (en) * 2013-04-30 2016-01-14 New Motech Co., Ltd. Driving apparatus for washing machine
US20170247826A1 (en) * 2016-02-25 2017-08-31 Samsung Electronics Co., Ltd. Washing machine and controlling method thereof
US10316453B2 (en) * 2015-10-02 2019-06-11 Lg Electronics Inc. Top-loading type washing machine
US11332872B2 (en) * 2015-12-01 2022-05-17 Qingdao Haier Washing Machine Co., Ltd Drum washing machine
WO2022169135A1 (ko) * 2021-02-08 2022-08-11 삼성전자주식회사 세탁기 및 그 제어 방법

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102541409B1 (ko) * 2016-05-19 2023-06-09 삼성전자주식회사 세탁기
JP2019088720A (ja) * 2017-11-17 2019-06-13 日立アプライアンス株式会社 洗濯機
KR20210142283A (ko) * 2020-05-18 2021-11-25 삼성전자주식회사 세탁기

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6065170A (en) * 1998-07-16 2000-05-23 Samsung Electronics Co., Ltd. Washing machine having a hybrid sensor and a control method thereof
US6477867B1 (en) * 1998-12-23 2002-11-12 Fisher & Paykel Limited Laundry appliance
US20030008741A1 (en) * 2000-09-26 2003-01-09 Fadler Richard J. Two piece stamped steel pulley

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5047464A (zh) * 1973-08-31 1975-04-26
JPS6297595A (ja) * 1985-10-23 1987-05-07 株式会社日立製作所 洗濯機の回転数検出装置
JPH02224699A (ja) * 1988-11-16 1990-09-06 Sanyo Electric Co Ltd 貯水槽付洗濯機
JP3176998B2 (ja) * 1992-07-17 2001-06-18 株式会社東芝 洗濯機の回転検出装置
KR0131284Y1 (ko) * 1994-09-08 1999-04-15 김광호 세탁기의 세탁량 및 모터의 회전수 감지장치
JP2000237492A (ja) * 1999-02-18 2000-09-05 Sanyo Electric Co Ltd 洗濯機
JP3564318B2 (ja) * 1999-03-29 2004-09-08 株式会社東芝 脱水兼用洗濯機

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6065170A (en) * 1998-07-16 2000-05-23 Samsung Electronics Co., Ltd. Washing machine having a hybrid sensor and a control method thereof
US6477867B1 (en) * 1998-12-23 2002-11-12 Fisher & Paykel Limited Laundry appliance
US20030008741A1 (en) * 2000-09-26 2003-01-09 Fadler Richard J. Two piece stamped steel pulley

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007000034A1 (en) * 2005-06-28 2007-01-04 Whirpool S.A. Driving arrangement for a laundry machine
US20080060388A1 (en) * 2006-09-13 2008-03-13 General Electric Company Washing machine having self-centering drive assembly
US7685665B2 (en) * 2006-09-13 2010-03-30 General Electric Company Washing machine having self-centering drive assembly
CN103201421A (zh) * 2010-12-02 2013-07-10 Lg电子株式会社 洗衣机
US9157176B2 (en) 2010-12-02 2015-10-13 Lg Electronics Inc. Washing machine
US20160010265A1 (en) * 2013-04-30 2016-01-14 New Motech Co., Ltd. Driving apparatus for washing machine
US9869050B2 (en) * 2013-04-30 2018-01-16 New Motech Co., Ltd. Driving apparatus for washing machine
CN105063963A (zh) * 2015-08-05 2015-11-18 宁波普尔机电制造有限公司 洗衣机离合机构
US10316453B2 (en) * 2015-10-02 2019-06-11 Lg Electronics Inc. Top-loading type washing machine
US11332872B2 (en) * 2015-12-01 2022-05-17 Qingdao Haier Washing Machine Co., Ltd Drum washing machine
US20170247826A1 (en) * 2016-02-25 2017-08-31 Samsung Electronics Co., Ltd. Washing machine and controlling method thereof
US10883215B2 (en) * 2016-02-25 2021-01-05 Samsung Electronics Co., Ltd. Washing machine and controlling method thereof
WO2022169135A1 (ko) * 2021-02-08 2022-08-11 삼성전자주식회사 세탁기 및 그 제어 방법

Also Published As

Publication number Publication date
JP2005125078A (ja) 2005-05-19
CN1609332B (zh) 2010-05-26
CN1609332A (zh) 2005-04-27
JP4083150B2 (ja) 2008-04-30
KR20050037692A (ko) 2005-04-25

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Legal Events

Date Code Title Description
AS Assignment

Owner name: SAMSUNG ELECTRONICS CO. LTD., KOREA, REPUBLIC OF

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:HAN, JIN CHUL;REEL/FRAME:015544/0202

Effective date: 20040625

STCB Information on status: application discontinuation

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