EP3342918A1 - Washing machine - Google Patents
Washing machine Download PDFInfo
- Publication number
- EP3342918A1 EP3342918A1 EP16838585.4A EP16838585A EP3342918A1 EP 3342918 A1 EP3342918 A1 EP 3342918A1 EP 16838585 A EP16838585 A EP 16838585A EP 3342918 A1 EP3342918 A1 EP 3342918A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tub
- supporting members
- washing
- rotation
- supporting member
- 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.)
- Withdrawn
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Classifications
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- 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
- D06F37/24—Mountings, e.g. resilient mountings, for the rotary receptacle, motor, tub or casing; Preventing or damping vibrations in machines with a receptacle rotating or oscillating about a vertical axis
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- 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
- D06F23/00—Washing machines with receptacles, e.g. perforated, having a rotary movement, e.g. oscillatory movement, the receptacle serving both for washing and for centrifugally separating water from the laundry
- D06F23/04—Washing machines with receptacles, e.g. perforated, having a rotary movement, e.g. oscillatory movement, the receptacle serving both for washing and for centrifugally separating water from the laundry and rotating or oscillating about a vertical axis
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- 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
- D06F37/26—Casings; Tubs
- D06F37/267—Tubs specially adapted for mounting thereto components or devices not provided for in preceding subgroups
- D06F37/268—Tubs specially adapted for mounting thereto components or devices not provided for in preceding subgroups for suspension devices
Abstract
Description
- The present disclosure relates to a washing machine.
- In a washing machine described in the following
Patent Document 1, an outer tub is supported by four hanging rods inside a machine frame, a washing and dehydrating tub is rotatably supported inside the outer tub, and a pulsator for agitating the laundry is provided at the bottom of the washing and dehydrating tub. The rotational power of a motor attached to a lower surface of the outer tub is transmitted to the washing and dehydrating tub and the pulsator. A lower end of the hanging rod is fixed to a mounting piece protruding from the bottom wall of the outer tub, and an upper end of the hanging rod is held by a hanging rod receiving metal that is fixed to a mounting piece protruding inward from the machine frame. The vibration of the outer tub in the case of the dewatering process of the washing operation or the like is absorbed by a compression spring that is provided at the top end of the hanging rod as a vibration-proof body. - The washing machine described in
Patent Document 1 has the following hidden danger: when a braking is applied to the rotation of the washing and dehydrating tub to stop the dehydrating process, the outer tub may vibrate greatly due to the bias of the laundry in the washing and dehydrating tub, and four hanging rods cannot completely inhibit the vibration of the outer tub, causing the outer tub to collide with the machine housing of the washing machine. - Patent Literature 1: Japanese Laid-Open Patent Publication No.
2001-137592 - The present disclosure has been made based on the above background, and an object of the present disclosure is to provide a washing machine capable of preventing a washing tub provided in a machine housing from vibrating and colliding with the machine housing.
- The present disclosure relates to a washing machine. The washing machine includes a machine housing; a washing tub having an inner tub which accommodates laundry and is rotatable and an outer tub for receiving the inner tub, and being provided inside the machine housing; four supporting members, which are configured to be in a shape of a rod suspended from the machine housing and elastically support the washing tub; and receiving portions, which are mounted at the lower portion of each of the supporting members respectively to connect the supporting members to the washing tub. All the receiving portions are provided at the same height, and among the four supporting members, the length of a pair of supporting members and the length of another pair of supporting members are different.
- In addition, the present disclosure is characterized in that the washing tub is capable of rotating in a manner of crossing with a vertical direction.
- According to the present disclosure, the four support members formed in a shape of a rod suspended from the machine housing are connected to the washing tub by the receiving portions attached to the lower portions of the four support members, respectively, such that the support members elastically support the washing tub provided inside the machine housing. All the receiving portions are provided at the same height. Among the four supporting members, the length of a pair of supporting members and the length of another pair of supporting members are different. When such a structure is adopted, the vibration of the washing tub is effectively suppressed by the four supporting members when the inner tub of the washing tub is rotating during the dewatering process of washing operation or when a braking is applied to the rotation of the inner tub for stopping the dewatering process, thereby suppressing the vibration of the washing tub and its collision with the machine housing.
- In addition, according to the present disclosure, the washing tub is capable of being rotated in a manner of crossing with a vertical direction. With a washing machine having the above-mentioned structure, the vibration of the washing tub can be suppressed through the four supporting members, and thus, the present disclosure can suppress the vibration of the washing tub and its collision with the machine housing.
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Fig. 1 is a left view of a main portion of a washing machine according to an embodiment of the present disclosure. -
Fig. 2 is a schematic longitudinal sectional view of a main portion and a peripheral portion of a supporting member of the washing machine. -
Fig. 3 is a schematic left view of the main portion of the washing machine. -
Fig. 4 is a diagram showing a relationship between an amplitude of the vibration of an outer tub of the washing tub generated along with the rotation of an inner tub during the dewatering process and a length difference between a front supporting member and a rear supporting member. -
Fig. 5 is a diagram showing a relationship between an amplitude of the vibration of the outer tub generated along with the termination of rotation of the inner tub at the end of the dewatering process and a length difference between a front supporting member and a rear supporting member. -
Fig. 6 is a left view of a washing machine in a modified example. - 1: Machine housing; 2: Washing tub; 3: Outer tub; 4. Inner tub; 7: Supporting member; 7A: Front supporting member; 7B: Rear supporting member; 18: Receiving portion; 100: Washing machine; Z: Up-down direction
- The embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.
Fig.1 is a left view of a main portion of awashing machine 100 according to an embodiment of the present disclosure. The up-down direction inFig. 1 is referred to as an up-down direction Z of thewashing machine 100, the left-right direction inFig. 1 is referred to as a front-rear direction Y of thewashing machine 100, and a direction perpendicular to the paper surface inFig. 1 is referred to as a left-right direction X. The up-down direction Z is a vertical direction. Regarding the up-down direction Z, the upper side is referred to as an upper side Z1, and the lower side is referred to as a lower side Z2. Regarding the front-rear direction Y, the right side ofFig. 1 is referred to as a front side Y1, and the left side ofFig. 1 is referred to as a rear side Y2. Regarding the left-right direction X, the surface side of the paper surface inFig. 1 is referred to as a left side XI, and the inner side of the paper surface inFig. 1 is referred to as a right side X2. - The
washing machine 100 includes a washing and drying machine that has a laundry drying function. However, in the following, thewashing machine 100 will be described with an example of the washing machine in which the laundry drying function is omitted and only the washing operation is performed. The washing operation includes a washing process, a rinsing process and a dewatering process. Thewashing machine 1 includes amachine housing 1 constituting an outer shell of the washing machine. Inside the machine housing 1, awashing tub 2 that is, anouter tub 3 and an inner tub 4 constituting thewashing tub 2, amotor 5, atransmission mechanism 6 and a supportingmember 7 are arranged. - The
machine housing 1 includes a metalouter frame 10 and adecorative cover 11, and as a whole is formed in a substantially box-like shape. Theouter frame 10 constitutes a frame of themachine housing 1, and thedecorative cover 11 is fixed to theouter frame 10 in a manner of covering theouter frame 10 from the outside. It should be noted that, for the convenience of explanation, , inFig. 1 , theouter frame 10 is shown by a dotted line, and at least one part of thedecorative cover 11 is shown by a dash-dot line (Fig. 6 , which is to be mentioned later, also relates to the above case) . - The
outer frame 10 integrally includes a total of fourvertical columns 12 that are arranged one by one at four corners of themachine housing 1 in plan view from the upper side Z1 and extend in the up-down direction Z. An upperhorizontal strut 13 is bridged between upper ends of twovertical columns 12 that are arranged one after another in the front-rear direction and extends in the front-rear direction Y, and a lowerhorizontal strut 14 is bridged between lower ends of the twovertical columns 12 that are arranged one after another in the front-rear direction and extends in the front-rear direction Y. Although not shown, theouter frame 10 further includes a horizontal strut that is bridged between the twovertical columns 12 that are arranged side by side in the left-right direction and extends in the left-right direction X. - Each of the
vertical columns 12 does not necessarily have to extend straight in the up-down direction Z, and may be bent or curved into a crank shape midway. Similarly, the upperhorizontal strut 13 and the lowerhorizontal strut 14 do not necessarily extend linearly in the front-rear direction Y, and may be bent or curved in the crank shape midway. In the present embodiment, each of the pair of left and rightupper struts 13 includes afront portion 13A extending from the upper end of thevertical column 12 in the front side Y1 to the rear side Y2, amiddle portion 13B extending from the rear end of thefront portion 13A to the upper side Z1, and a rear portion 13C extending from the upper end of themiddle portion 13B to the rear side and connected to the upper end of thevertical column 12 of the rear side Y2, and as a whole is configured in a shape of a crank. - The
decorative cover 11 is formed in a shape of a plate, and covers theouter frame 10 at least from the left side X1, the right side X2, the front side Y1, the back side Y2 and the upper side Z1. A portion of thedecorative cover 11 that covers theouter frame 10 from the upper side Z1 is provided thereon with an entrance (not shown) for taking the laundry into the washing machine and taking the laundry out of thewashing machine 100. - The
outer tub 3 is, for example, made of resin, and has a bottomed cylindrical shape. Theouter tub 3 is disposed inside theouter frame 10, and water can be stored inside theouter tub 3. Theouter tub 3 has a substantially cylindricalcircumferential wall 15 arranged in the up-down direction Z and a disc-shaped bottom wall 16 that closes a hollow portion of thecircumferential wall 15 from the lower side Z2. Thecircumferential wall 15 is provided therein with an opening 15A surrounded by an upper end edge of the circumferential wall. The opening 15A is located just below the above-described entrance (not shown) of thedecorative cover 11 so that the hollow portion of thecircumferential wall 15 communicates with the entrance. - A plurality of
ribs 17 is formed on the outer peripheral surface of thecircumferential wall 15 to protrude toward the radial outer side R of thecircumferential wall 15 for reinforcing thecircumferential wall 15. Theribs 17 include alongitudinal rib 17A that extends in the up-down direction and ahorizontal rib 17B that extends in the peripheral direction S of theouter tub 3. Receivingportions 18 are provided at the lower ends of twolongitudinal ribs 17A adjacent in the circumferential direction S.Four receiving portions 18 are integrally provided at the lower end portion of the outer peripheral surface of thecircumferential wall 15 in a manner of being arranged one by one at four corners of themachine housing 1 in a plan view. The two receivingportions 18 located at the front side Y1 are referred to as front receivingportions 18A, and the remaining two receivingportions 18 located at the rear side Y2 are referred to as rear receivingportions 18B. The twofront receiving portions 18A are arranged closer to the lower side Z2 than thefront portion 13A of the upperhorizontal strut 13 and are spaced apart in the left-right direction. The two rear receivingportions 18B are arranged closer to the lower side Z2 than the rear portion 13C of the upperhorizontal strut 13 and are spaced apart in the left-right direction. - Each receiving
portion 18 integrally includes a plate-shapedbase portion 19 that is bridged between two adjacentlongitudinal ribs 17A and is curved in a manner of bulging to the outer side R radially, and a dome-shapedengagement portion 20 that bulges from an upper end of the base portion 19A toward the upper side Z1. The space enclosed by the lower ends of two adjacentlongitudinal ribs 17A, the receivingportion 18 provided over theselongitudinal ribs 17A, theengagement portion 20 at the upper end of the receivingportion 18 and the outer peripheral surface of thecircumferential wall 15 is called anaccommodation space 21. Theaccommodation space 21 is a recess that is recessed toward the upper side Z1 and faces theengagement portion 20 and is exposed from the lower end of thebase portion 19 toward the lower side Z2. The receivingportion 18 is formed with a throughhole 18C that penetrates the upper end of theengagement portion 20 in the up-down direction Z and aslit 18D that extends continuously from the throughhole 18C to the lower side Z2 and bisects the entire receivingportion 18 in the circumferential direction S. The throughhole 18C and theslit 18D are in a state of communicating with theaccommodation space 21. - The lower surface of the
bottom wall 16 is provided with a plurality ofribs 22 protruding toward the lower side Z2 and reinforcing thebottom wall 16, adrain 23 for discharging the water stored in theouter tub 3 and the like. - The inner tub 4 shown by the two-dot chain line in
Fig. 1 is made of, for example, metal, and is formed in a bottomed cylindrical shape smaller than theouter tub 3 by a loop, and is housed coaxially in theouter tub 3. The inner tub 4 can house the laundry inward. Anopening 4A that communicates with theopening 15A of theouter tub 3 from immediately below is formed on the upper surface of the inner tub 4. A user of thewashing machine 100 puts the laundry into the washing machine and takes them out of the washing machine via the above-described entrance (not shown) of thedecorative cover 11, theopening 15A and theopening 4A. A plurality of through holes (not shown) is formed in the inner tub 4 so that the water in theouter tub 3 can travel between theouter tub 3 and the inner tub 4 via the through holes. Therefore, the water level in theouter tub 3 is the same as the water level in the tub 4. At a portion of the bottom wall of the inner tub 4 that coincides with the center of the inner tub 4, arotation shaft 4B protruding toward the lower side Z2 is disposed. Therotation shaft 4B is rotatably supported by thebottom wall 16 of theouter tub 3. Therefore, the inner tub 4 is rotatable around therotation shaft 4B. - The
motor 5 is an electric motor such as a frequency inverter motor. Themotor 5 is fixed to thebottom wall 16 of theouter tub 3 from the lower side Z2. Themotor 5 has an output shaft (not shown) that protrudes toward the upper side Z1. Thetransmission mechanism 6 is interposed between the output shaft of themotor 5 and therotation shaft 4B of the inner tub 4. As thetransmission mechanism 6, a known one may be used.. Thetransmission mechanism 6 transmits the driving force outputted by themotor 5 from the output shaft to therotation shaft 4B. As a result, the inner tub 4 rotates. In particular, in the dewatering process, the inner tub 4 is rotated at a high speed in order to cause centrifugal force to act on the laundry to effectively dewater the laundry. It should be noted that a pulsator (not shown) that rotates to stir the stored laundry is provided in the inner tub 4, and the driving force of themotor 5 is transmitted from thetransmission mechanism 6 to the pulsator. - The supporting
member 7 is a member formed in a rod shape, which is also referred to as a hanging rod, and is disposed in themachine housing 1 in in a state of being elongated vertically. There are four supportingmembers 7, which are provided at the four corners of themachine housing 1 one by one. Of the four supportingmembers 7, the pair of left and right supportingmembers 7 at the front side Y1 is referred to as front supportingmembers 7A, and another pair of left and right supportingmembers 7 at the rear side Y2 is referred to as rear supportingmembers 7B.Fig. 1 andFigs. 3 and6 to be mentioned later show the front supportingmember 7A and therear supporting member 7B located at the left side X1 one by one, and the front supportingmember 7A and therear supporting member 7B located at the right side X2 are not illustrated. However, the pair of right and leftfront supporting members 7A overlaps each other when viewed in the left-right direction X, and the pair of left and rightrear supporting members 7B overlaps each other when viewed from the left-right direction X. - A friction damper can be used as an example of the supporting
member 7. Of course, other well-known dampers, such as the hydraulic damper, can be used as the supportingmember 7. When the supportingmember 7 is a friction damper, the supportingmember 7 includes arod 28 that extends upward and downward in an elongated and linear shape and ahollow housing 29 that houses the lower end of therod 28. Referring toFig. 2 , which is a schematic longitudinal sectional view of the main portion and the peripheral portion of the supportingmember 7, the supportingmember 7 includes a disk-shapeddamper member 30 connected to the lower end of therod 28 in thehousing 29 and an urgingmember 31 such as a coil spring, provided in thebody 29. Therod 28 is movable relative to thehousing 29, and by this relative movement, the entire supportingmember 7 can expand and contract. In addition, since the urgingmember 31 urges thedamper member 30 toward the lower side Z2 within thehousing 29, the supportingmember 7, as a whole, is elastically extensible. - Referring to
Fig. 3 , which is a schematic left view of the main portion of thewashing machine 100, in conjunction with therod 28, a pair of left and right upper horizontal struts 13 of theouter frame 10 is provided with oneconnection portion 32 at thefront portion 13A and oneconnection portion 32 at the rear portion 13C (seeFig. 1 ). In other words, there are fourconnection portions 32 in total. Each of theconnection portions 32 is formed in a thin metallic plate shape in the up-down direction Z. Theconnection portion 32 may be provided integrally with the upperhorizontal strut 13 or may be fixed to the upperhorizontal strut 13 with screws or the like as a separate member. Theconnection portion 32 provided on the upperhorizontal strut 13 at the left side X1 is configured in a manner of protruding to the right side X2 toward thewashing tub 2 from this upperhorizontal strut 13. The connection portion 32 (not shown) provided on the upperhorizontal strut 13 at the right side X2 is configured in a manner of protruding to the left side X1 toward thewashing tub 2 from this upperhorizontal strut 13. In each of the upperhorizontal strut 13, theconnection portion 32 provided at thefront portion 13A is referred to as a frontside connection portion 32A, and theconnection portion 32 provided at the rear portion 13C is referred to as a rearside connection portion 32B (seeFig. 1 ). Each of theconnection portions 32 is formed with a through hole 32C that runs through theconnection portion 32 in the up-down direction Z. An innerperipheral surface 32D defining the through hole 32C in theconnection portion 32 is formed into a spherical shape that becomes narrower toward the lower side Z2. - At the upper end of the
rod 28, a hemisphericalupper engagement portion 28A bulging toward the lower side Z2 is provided. Theupper engagement portion 28A of each of the front supportingmembers 7A is fitted from the upper side Z1 into the through hole 32C of the frontside connection portion 32A located at the same position in the left-right direction X so as to be in a state of engaging with the frontside connection portion 32A from the upper side Z1. Theupper engagement portion 28A of each of therear supporting members 7B is fitted from the upper side Z1 into the through hole 32C of the rearside connection portion 32B located at the same position in the left-right direction X so as to be in a state of engaging with the rearside connection portion 32A from the upper side Z1. Each of theupper engagement portions 28A is in a state of being in spherical contact with the innerperipheral surface 32D that defines the through hole 32C in theconnection portion 32. - The
housing 29 is formed in a substantially cylindrical shape whose long edge is in the longitudinal direction of therod 28. The upper end portion of thehousing 29, as thelower engagement portion 29A, is formed as a hemispherical shape bulging toward the upper side Z1. Therod 28 is in a state of vertically penetrating theupper end 29B of thelower engagement portion 29A and protruding toward the upper side Z1. Thelower engagement portion 29A of each of the front supportingmembers 7A is fitted from the lower side Z2 into theaccommodation space 21 of the front receivingportion 18A at the same position in the left-right direction X so as to be in a state of engaging with theengagement portion 20 of the front receivingportion 18A from the lower side Z2. Thelower engagement portion 29A of each of therear supporting members 7B is fitted from the lower side Z2 into theaccommodation space 21 of therear receiving portion 18B located at the same position in the left-right direction X so as to be in a state of engaging with theengagement portion 20 of therear receiving portion 18B from the lower side Z2. In this way, the four receivingportions 18 are mounted one by one to thelower engagement portions 29A located at the lower portion of each of the supportingmembers 7. It should be noted that when thelower engagement portion 29A is fitted into theaccommodation space 21, therod 28 passes through theslit 18D of the receivingportion 18. - At each of the supporting
members 7, thelower engagement portion 29A is in spherical contact with the innerperipheral surface 20A (seeFig. 2 ) where theaccommodation space 21 is defined in theengagement portion 20, and therod 28 is in the state of protruding to the upper side Z1 from the throughhole 18C of the upper end of the receivingportion 18. Therod 28 may be disposed to extend vertically in the up-down direction Z or may be disposed to be inclined towards the left-right direction X and the front-back direction Y with respect to the up-down direction Z. In the present embodiment, therod 28 of the front supportingmember 7A is obliquely arranged in such a way that as therod 28 goes to the upper side Z1, therod 28 is inclined more towards the front side Y1, and therod 28 of therear supporting member 7B is obliquely arranged in such a way that as therod 28 goes to the upper side Z1, therod 28 is inclined more towards the rear side Y2. - Each of the supporting
members 7 is in a state of being suspended from theconnection portion 32 of the upperhorizontal strut 13 of the outer frame 10 (seeFig. 1 ). Thelower engagement portion 29A of thehousing 29 located at the lower end portion of the supportingmember 7 is connected to theouter tub 3 of thewashing tub 2 by the receivingportion 18. Since each supportingmember 7 is elastically extensible and contractible, the four supportingmembers 7 are in a state of elastically supporting thewashing tub 2, themotor 5 secured to theouter tub 3 and the transmission mechanism 6 (see alsoFig. 1 ). Therefore, the vibration of thewashing tub 2 generated along with the rotation of the inner tub 4 during the washing operation is prevented from being transmitted to themachine housing 1 through theconnection portion 32. - In addition, for each of the supporting
members 7, since thedamper member 30 moves together with the lower end portion of therod 28 when the supportingmember 7 expands and contracts, and rubs the inner peripheral surface 29C (seeFig. 2 ) of thehousing 29, a frictional force is generated between thedamper member 30 and the inner peripheral surface 29C of thehousing 29. With this frictional force, the vibration generated by thewashing tub 2 is reduced. As described above, each of the supportingmembers 7 is in a state where theupper engagement portion 28A is in spherical contact with theconnection portion 32 and thelower engagement portion 29A is in spherical contact with theengagement portion 20 of the receivingportion 18. Therefore, the inclination of the supportingmember 7 with respect to the up-down direction Z is freely changed in such a way that the force caused by the vibration of thewashing tub 2 does not act on the supportingmember 7 and themachine housing 1. - The four receiving
portions 18 are arranged at the same height. In particular, the throughholes 18C of the four receivingportions 18 are located at the same position in the up-down direction Z, respectively. Therefore, thehousings 29 of the four supportingmembers 7, which are fitted into theaccommodation space 21 of the receivingportion 18 from the lower side Z2, are arranged at the same position in the vertical direction Z. Specifically, the upper ends 29B of thelower engagement portions 29A of thehousings 29 of the four supportingmembers 7 that are exposed from the throughholes 18C are arranged at the same position in the up-down direction Z. - On the other hand, among the four
connection portions 32 where the upper horizontal struts 13 of themachine housing 1 are engaged with the upperside engagement portions 28A of theengagement supporting members 7, thefront connection portion 32A provided at thefront portion 13A is located at a position that is lower than therear connection portion 32B. Thisrear connection portion 32B is provided at the rear portion 13C (refer toFig. 1 ) located at a position higher than that of thefront portion 13A. In this case, among the four supportingmembers 7, a pair offront supporting members 7A having theupper engagement portions 28 that are engaged with thefront connection portions 32A has the same length, and the other pair of rear supportingmembers 7B having theupper engagement portions 28A that are engaged with therear connection portions 32B has the same length. However, the length of the pair offront supporting members 7A and the length of the pair of rear supportingmembers 7B are different. Strictly speaking, thefront supporting member 7A is shorter than therear supporting member 7B. It should be noted that, in one example, the length of the supportingmember 7 refers to a length of the line segment L that connects theportion 28B of theupper engagement portion 28A that coincides with the lower surface of theconnection portion 32 to theupper end 29B of thelower engagement portion 29A and extends along therod 28 when the operation of themachine housing 100 is stopped. The length of the line segment L is also the portion of a range of each of the supportingmembers 7 from the receivingportion 18 to theconnection portion 32. In other words, the length of the line segment L refers to a length of a portion of the supportingmember 7 positively contributing to reduce vibrations. Of course, as another example, the total length of therod 28 and the total length of the supportingmember 7 may be defined as the length of the supportingmember 7. -
Fig. 4 is a diagram showing a relationship between an amplitude of the vibration of theouter tub 3 of thewashing tub 2 generated along with the rotation of the inner tub 4 during the dewatering process and a length difference between a front supportingmember 7A and arear supporting member 7B.Fig. 5 is a diagram showing a relationship between an amplitude of the vibration of theouter tub 3 generated along with the termination of the rotation of the inner tub 4 at the end of the dewatering process and a length difference between the front supportingmember 7A and therear supporting member 7B. InFigs. 4 and5 , the horizontal axis represents the length difference between the front supportingmember 7A and therear supporting member 7B when the front supportingmember 7A is shorter than therear supporting member 7B. On the other hand, the longitudinal axis ofFig. 4 represents the amplitude of the vibration of theouter tub 3 generated during the rotation of the inner tub 4 in the dehydration, and the longitudinal axis ofFig. 5 represents the amplitude of the vibration of theouter tub 3 generated at the termination of rotation of the inner tub 4 when a braking is applied along with the termination of the dewatering process. The unit of the length difference and the amplitude is, for example, mm. - The braking to the rotation of the inner tub 4 can be realized in a manner in which a control portion (not shown) provided in the
washing machine 100 controls a duty ratio to cause a rapid stop of the rotation of themotor 5 or in a manner in which a braking device (not shown) is additionally provided and the control portion is used to cause the braking device to operate such that the rotation of themotor 5 is stopped rapidly. - When a structure in which the four receiving
portions 18 receiving the lower end portions of the supportingmembers 7 are arranged at the same height is used, as shown inFig. 4 , even if the length difference between the front supportingmember 7A and therear supporting member 7B becomes larger, the amplitude of the vibration of theouter tub 3 during the rotation of the inner tub 4 in the dewatering process is almost unchanged. On the other hand, as shown inFig. 5 , when the length difference between the front supportingmember 7A and therear supporting member 7B becomes larger, the amplitude of the vibration of theouter tub 3 generated when the rotation of the inner tub 4 is stopped due to the braking becomes smaller. In other words, it is considered that the vibration of theouter tub 3 due to the stop of the rotation of the inner tub 4 is effectively reduced because of the difference in length between the front supportingmember 7A and therear supporting member 7B. - Therefore, when a structure in which the length of the pair of
front supporting members 7A and the length of the pair of rear supportingmembers 7B are different and the four receivingportions 18 are arranged in the same height position is adopted, even if a braking is applied to the rotation of the inner tub 4 for stopping the dewatering process when the inner tub 4 is rotating during the dewatering process, the vibration of theouter tub 3 can be effectively suppressed by the four supportingmembers 7. This can prevent theouter tub 3 of thewashing tub 2 inside themachine housing 1 from vibrating and colliding with themachine housing 1. -
Fig. 6 is a left view of a washing machine in a modified example. InFig. 6 , the same parts as those already described inFigs. 1 to 3 are denoted by the same reference numerals, and description of these parts will be omitted. In thewashing machine 100 already described with reference toFigs. 1 to 3 , thewashing tub 2 is always arranged vertically. However, thewashing machine 100 according to the modified example shown inFig. 6 can change the posture of thewashing tub 2. - Specifically, the
washing machine 100 according to the modified example further includes a supportingframe 50, arotation portion 51, alock release mechanism 52 and a driving mechanism 53. - The supporting
frame 50 includes a pair of left and right side plates 54 and a bridge member (not shown) that is bridged between the pair of side plates 54. InFig. 6 , only the side plate 54 at the left side X1 is illustrated. Each of the side plates 54 is formed into a substantially rectangular shape when viewed in the left-right direction X, and it thin in the left-right direction X. Awashing tub 2 is disposed between the pair of side plates 54. - A position of the right side and a position of the left side of the
outer tub 3 of thewashing tub 2, which are at the same position when viewed from the left-right direction X, each is provided with ametallic rotation shaft 55 protruding outward in the left-right direction X. Therotation shaft 55 of theouter tub 3 protruding towards the left side X1 penetrates the side plate 54 at the left side X1, and is rotatably supported by the side plate 54 at the left side X1 via a bearing (not shown). Therotation shaft 55 of the outer tub 3 (not shown) protruding towards the right side X2 penetrates the side plate 54 of the right side X2, and is rotatably supported by the side plate 54 of the right side X2 via a bearing (not shown). Accordingly, thewashing tub 2 having theouter tub 3 and the inner tub 4 (not shown) is supported by the supportingframe 50 and is rotatable around therotation shaft 55 in a manner of crossing with the up-down direction Z. Specifically, with the rotation of thewashing tub 2, a central axis J of theouter tub 3 and the inner tub 4 is inclined towards the front-back direction Y with respect to the up-down direction Z. The rotation direction of thewashing tub 2 is referred to as the direction of rotation K. - An intersection angle of an imaginary reference axis M extending in the up-down direction Z and the central axis J which is an acute angle is a rotation angle θ of the
washing tub 2 with respect to the reference axis M. The smaller the rotation angle θ is, the closer thewashing tub 2 is to the upright posture. The larger the rotation angle θ is, the more thewashing tub 2 is inclined towards the front side Y1 in such a way that theopening 15A of theouter tub 3 faces the front side Y1. The rotation angle θ can be changed be changed in five stages of, for example, 5 degrees, 15 degrees, 30 degrees, 45 degrees and 60 degrees. The rotation angle θ inFig. 6 is 60 degrees. InFig. 6 , the moving track of the end surface on theopening 15A side of theouter tub 3 when thewashing tub 2 is rotated between 5 degrees and 60 degrees is illustrated by a two-dot chain line. - As an example of the application of the
washing machine 100 in the modified example, when the laundry are thrown into thewashing tub 2 at the start of the washing operation, the rotation angle θ is set to be 45 degrees so that the laundry can be easily introduced. It is noted that, in themachine housing 1 of thewashing machine 100 according to the modified example, aconnection surface 1C that connects thefront surface 1A and theupper surface 1B and descends towards the front side Y1 is provided, and the above-described entrance (not shown) is formed across thefront surface 1A and theconnection surface 1C. In addition, after the laundry is put in, when detecting the load amount of the laundry or supplying water to theouter tub 3, the rotation angle θ is set to be 5 degrees. Then, during the washing process and the rinsing process, the rotation angle θ is set to be varied between 5 degrees and 60 degrees in order to facilitate the alternation of the positions of the laundry in the inner tub 4 for effective washing and rinsing. - An
opening 54A that penetrates the side plate 54 in the left-right direction X is formed in a region of the side plate 54 of the left side X1 closer to the lower side Z2 than therotation shaft 55 is. Theopening 54A is formed in a substantially rectangular shape elongated in the front-rear direction Y. - The
rotation portion 51 is a metal plate which is thin in the left-right direction X and is formed in a substantially fan-like shape bulging to the front side Y1 as viewed from the left-right direction X. Therotation portion 51 has an outerperipheral edge 51A formed in an arc shape along the rotation direction K and bulging toward the front side Y1. A throughhole 51B that penetrates therotation portion 51 in the left-right direction X is formed at a position of therotation portion 51 in accordance with the center of curvature of the outerperipheral edge 51A. A plurality ofrecesses 51C are formed on the outerperipheral edge 51A. There are five recesses in this embodiment. Theserecesses 51C are recessed toward the through-hole 51B and penetrate therotation portion 51 in the left-right direction X, and are arranged side by side in the rotation direction K. The intervals between theadjacent recesses 51C may be constant or may be different depending on the position of therotation portion 51. In the present embodiment, corresponding to the rotation angle θ which is set to 5 degrees, 15 degrees, 30 degrees, 45 degrees, and 60 degrees, in therotation portion 51 in the attitude ofFig. 1 , the tworecesses 51C at the most rear side Y2 and the adjacent position thereof are spaced apart by 10 degrees in the rotation direction K (the circumferential direction with the throughhole 51B as the center), and the intervals between the otheradjacent recesses 51C are set to be 15 degrees uniformly. - The
rotation portion 51 is disposed to be closer to the left side X1 than the side plate 54 is. Therotation shaft 55 protruding to the left side X1 at theouter tub 3 and running through the side plate 54 at the left side X1 is inserted into the throughhole 51B of therotation portion 51, and is fixed to therotation portion 51. Thus, therotation portion 51 is connected to theouter tub 3 therotation shaft 55, such that therotation portion 51 may rotate integrally with theouter tub 3. - The
rotation portion 51 in the attitude ofFig. 6 is integrally provided towards the lower side Z2, at the rear end of the outerperipheral edge 51A, specifically, with anextension portion 51D protruding outward in the radial direction T of therotation portion 51 with the throughhole 51B as the center. Theextension portion 51D is formed with aguide hole 51E that is long in the radial direction T and runs through theextension portion 51D in the left-right direction X. Theguide hole 51E and theopening 54A of the side plate 54 at the left side X1 are located at the same position in the up-down direction Z, and always faces theopening 54A from the left side X1. - The
lock release mechanism 52 is fixed to the left surface of the side plate 54 at the left side X1. Thelock release mechanism 52 includes amain body portion 56 provided with an actuator (not shown) composed of a solenoid or the like, and alock portion 57 formed in a convex shape protruding toward the back side Y2. Thelock portion 57 is supported by themain body portion 56 in a way that thelock portion 57 is slideable in the front-back direction Y. The actuation of the actuator of themain body 56 causes thelock portion 57 to slide between an entry position where thelock portion 57 enters toward the rearmost side Y2 and a retracting position where thelock portion 57 is retracted toward the foremost side Y1. Thelock portion 57 inFig. 6 is located at the entry position in a state of being embedded in therecess 51C provided at the same position in the rotation direction K. Thus, the rotations of therotation portion 51 and thewashing tub 2 are locked. In this state, when thelock portion 57 is retreated to the retracting position, thelock portion 57 is disengaged from therecess 51C, and thus, the locking of therotation portion 51 and thewashing tub 2 is released. - The driving mechanism 53 includes a frame 58, a pair of receiving
portions 59, a threadedshaft 60, amotor 61, acoupling 62, anut member 63 and asensor 64. - The frame 58 is formed by bending a metal plate into, for example, a crank shape, and the frame 58 is fixed to the side plate 54 from the right side X2 so as to cover the
opening 54A of the side plate 54 at the left side X1 from the right side X2. The pair of receivingportions 59 is fixed to the frame 58 in a state of being spaced apart from each other in the front-back direction Y and protruding from the frame 58 to the left side X1. The threadedshaft 60 is formed in a columnar shape elongated in the front-rear direction Y, and is provided with ahelical thread 60A extending in a spiral shape formed over substantially the entire outer peripheral surface thereof. The threadedshaft 60 is rotatably supported at two ends by bearing (not shown) provided on the pair of front and rear receivingportions 59. - The
motor 61 is a general electric motor, and has an output shaft 65 that protrudes to the rear side Y2 and is arranged coaxially with the threadedshaft 60. The front end of the threadedshaft 60 and the output shaft 65 are coupled to each other by acoupling 62 such that the threadedshaft 60 and the output shaft 65 can be integrally rotated. Therefore, when themotor 61 is driven so that the output shaft 65 is rotated, the threadedshaft 60 rotates integrally with the output shaft 65. Thenut member 63 has an annular nut formed with thread (not shown) extending in a spiral shape at an inner peripheral surface thereof and is externally fitted to the threadedshaft 60 in a such a way that the thread is threadedly connected to thethread 60A of the threadedshaft 60. When the threadedshaft 60 is rotated by the driving of themotor 61, thenut member 63, as a whole, moves in the axial direction of the threadedshaft 60, i.e. the front-back direction Y, along with the rotation of thescrew shaft 60. Thenut member 63 is secured with aconnection pin 66 which is inserted into theextension portion 51D of therotation portion 51, such that thenut member 63 is connected to therotation portion 51 via theconnection pin 66. Therefore, when thenut member 63 moves in the front-rear direction Y along with the rotation of the threadedshaft 60, therotation portion 51 is pulled by thenut member 63 in the front-rear direction Y, thereby rotating with thewashing tub 2. - The
sensor 64 is a sensor that detects the rotation angle θ of thewashing tub 2 based on the position of thenut member 63 in the front-rear direction Y. As thesensor 64, an optical sensor such as a photo sensor may be used. In this case, the number of thesensors 64 is set to be the same as the number of therecesses 51C of therotation portion 51, and the sensors 54 are fixed to the frame 58 in a state of being aligned in the front-rear direction Y. Eachsensor 64 is formed with agroove 64A penetrating thesensor 64 in the front-rear direction Y, and thesensor 64 is in a state that the detection light traverses thegroove 64A in the up-down direction Z. Thenut member 63 is provided with a rod-shaped detectedportion 63A, which is referred to as a limiting portion. When the rotation angle θ is set to be one of 5 degrees, 15 degrees, 30 degrees, 45 degrees and 60 degrees, the detectedportion 63A is embedded in thegroove 64A of one of thesensors 64 and shields the detection light of thegroove 64A. Therefore, the fivesensors 64 collectively detect which one of 5 degrees, 15 degrees, 30 degrees, 45 degrees and 60 degrees is the rotation angle θ. - In the
washing machine 100 of the modified example, a pair of left and rightlongitudinal plates 71 protruding outward in the front-rear direction Y is provided on a front end edge and a rear end edge of each side plate 54 of the supportingframe 50. One receivingportion 18 is provided on the pair oflongitudinal plates 71, and the receivingportion 18 is integrated with thelongitudinal plates 71. Like the case in the above-described embodiment (seeFigs. 1 to 3 ), there are four receivingportions 18, which are arranged at the four corners of themachine housing 1 one by one when viewed from top. Among the four receivingportions 18, the twofront receiving portions 18A are disposed closer to the lower side Z2 than thefront portion 13A of the upperhorizontal strut 13, and are spaced apart from each other in the left-right direction, and the two rear receivingportions 18B are disposed closer to the lower side Z2 than the rear portion 13C of the upperhorizontal strut 13, and are spaced apart from each other in the left-right direction. - The
base portion 19 of the front receivingportion 18A is formed into a curved plate shape in a manner of being bridged between twolongitudinal plates 71 which are provided at the front edges of the side plates 54 and bulging toward the front side Y1. Thebase portion 19 of therear receiving portion 18B is formed into a curved plate shape in a manner of being bridged between twolongitudinal plates 71 which are provided at the rear edges of the side plates 54 and bulging toward the rear side Y2. Theaccommodation space 21 is a space enclosed by the two adjacentlongitudinal plates 71, thebase portions 19 and theengagement portion 20. - In the
washing machine 100 in the modified example, four supportingmembers 7 are arranged at four corners of themachine housing 1 one by one. In thewashing machine 100 according to the modified example, as shown inFig. 3 , among the four supportingmembers 7A, theupper engagement portions 28A of the two front supportingmembers 7A are in a state of being engaged from the upper side A1 with thefront connection portions 32A that are provided at the same position in the left-right direction X, and theupper engagement portions 28A of the tworear supporting members 7B are in a state of being engaged from the upper side Zlwith the rearside connection portions 32B that are provided at the same position in the left-right direction X. Thelower engagement portion 29A of each of the front supportingmembers 7A is fitted from the lower side Z2 into theaccommodation space 21 of the front receivingportion 18A located at the same position in the left-right direction X so as to be engaged with theengagement portion 20 of thefront connection portion 32A from the lower side Z2. Thelower engagement portion 29A of each of therear supporting members 7B is fitted from the lower side Z2 into theaccommodation space 21 of therear receiving portion 18B located at the same position in the left and right direction X so as to be engaged with theengagement portion 20 of therear connection portion 32B from the lower side Z2. Thelower engagement portion 29A is in a state of being spherical contact with the innerperipheral surface 20A (seeFig. 2 ) that defines theaccommodation space 21 in theengagement portion 20, and therod 28 is in a state of protruding from the throughhole 18C of the upper end of the receivingportion 18 to the upper side Z1. - Each of the supporting
members 7 is in a state of being suspended from theconnection portion 32 provided on the upperhorizontal strut 13 of theouter frame 10. The four receivingportions 18 are mounted one by one to thelower engagement portions 29A located at a lower portion of the supportingmembers 7. Thus, as shown inFig. 6 , each of the supportingmembers 7 is connected to theouter tub 3 of thewashing tub 2 via the side plate 54 of the supportingframe 50 through the receivingportion 18. Since each supportingmember 7 is elastically extensible and retractable, the four supportingmembers 7 suspend thewashing tub 2, themotor 5 and the transmission mechanism 6 (seeFig. 1 ) which are fixed to theouter tub 3, , the supportingframe 50, therotation portion 51 and thelock release mechanism 52 for elastic support. - Similar to the
washing machine 100 of the modified example in which thewashing tub 2 is rotatable as described above, all the receivingportions 18 for receiving the lower ends of the supportingmembers 7 are arranged at the same height position, and the length of the pair offront supporting members 7A is different from the length of the pair of rear supportingmembers 7B. Strictly speaking, thefront supporting member 7A is shorter than therear supporting member 7B (seeFig. 3 ). In this case, as described with reference toFigs. 4 and5 , since the vibration of theouter tub 3 is effectively suppressed by the four supportingmembers 7, the vibration of theouter tub 3, that is, the vibration of thewashing tub 2, and the collision with themachine housing 1 can be prevented. - The present disclosure is not limited to the above-described embodiments, and various changes may be made within the scope of the claims.
- For example, among the four supporting
members 7, the pair of front supportingside members 7A is shorter than the pair of rear supportingmembers 7B. However, the pair of rear supportingmembers 7B may be shorter than the pair offront supporting members 7A. In addition, the four supportingmembers 7 may be configured such that instead of the pair of supportingmembers 7 on the front side Y1 and the pair of supportingmembers 7 on the rear side Y2 being different in length, the pair of supportingmembers 7 on the left side X1 and the pair of supportingmembers 7 on the right side X2 are different in length.
Claims (2)
- A washing machine, comprising:a machine housing,a washing tub having an inner tub which accommodates laundry and is rotatable and an outer tub for receiving the inner tub, and being provided inside the machine housing,four supporting members, which are configured to be in a shape of a rod suspended from the machine housing and elastically support the washing tub, andreceiving portions, which are mounted at the lower portion of each of the supporting members respectively to connect the supporting members to the washing tub,wherein all the receiving portions are provided at the same height, and among the four supporting members, a length of a pair of supporting members and that of another pair of supporting members are different.
- The washing machine according to claim 1, wherein the washing tub is capable of rotating in a manner of crossing with a vertical direction.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2015166228A JP2017042328A (en) | 2015-08-25 | 2015-08-25 | Washing machine |
PCT/CN2016/096690 WO2017032327A1 (en) | 2015-08-25 | 2016-08-25 | Washing machine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3342918A1 true EP3342918A1 (en) | 2018-07-04 |
EP3342918A4 EP3342918A4 (en) | 2019-04-10 |
Family
ID=58099644
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16838585.4A Withdrawn EP3342918A4 (en) | 2015-08-25 | 2016-08-25 | Washing machine |
Country Status (6)
Country | Link |
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US (1) | US20180245261A1 (en) |
EP (1) | EP3342918A4 (en) |
JP (1) | JP2017042328A (en) |
KR (1) | KR20180042390A (en) |
CN (1) | CN107923107B (en) |
WO (1) | WO2017032327A1 (en) |
Family Cites Families (21)
Publication number | Priority date | Publication date | Assignee | Title |
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JPS48113878U (en) * | 1972-03-28 | 1973-12-26 | ||
JPS52137163A (en) * | 1976-05-10 | 1977-11-16 | Hitachi Ltd | Single-tank type dehydrating washing machine |
JPS5911754Y2 (en) * | 1976-12-15 | 1984-04-10 | 三洋電機株式会社 | dehydration washing machine |
US5111673A (en) * | 1988-06-20 | 1992-05-12 | Matsushita Electric Industrial Co. Ltd. | Washing-drying machine |
JP2650722B2 (en) * | 1988-06-20 | 1997-09-03 | 松下電器産業株式会社 | Washing and drying machine |
JPH03186292A (en) * | 1989-12-18 | 1991-08-14 | Hitachi Ltd | Washing machine |
JPH0544085U (en) * | 1991-11-20 | 1993-06-15 | 松下電器産業株式会社 | Washing machine |
JP3101519B2 (en) * | 1995-02-03 | 2000-10-23 | 三洋電機株式会社 | Dehydration washing machine |
KR19990024961A (en) * | 1997-09-09 | 1999-04-06 | 구자홍 | Damper device of washing machine |
JP2001137592A (en) * | 1999-11-17 | 2001-05-22 | Sanyo Electric Co Ltd | Washing machine |
KR200320744Y1 (en) * | 2003-04-29 | 2003-07-22 | 주식회사 대우일렉트로닉스 | Washing machine for preventing vibration thereof |
JP2006000302A (en) * | 2004-06-16 | 2006-01-05 | Hitachi Home & Life Solutions Inc | Drum type washing machine |
JP4647561B2 (en) * | 2006-03-17 | 2011-03-09 | 三菱電機株式会社 | Washing machine |
CN101356309A (en) * | 2006-03-17 | 2009-01-28 | 三菱电机株式会社 | Washing machine |
WO2007148746A1 (en) * | 2006-06-23 | 2007-12-27 | Mitsubishi Electric Corporation | Washing machine |
JP2008000476A (en) * | 2006-06-23 | 2008-01-10 | Mitsubishi Electric Corp | Washing machine |
WO2008018350A1 (en) * | 2006-08-08 | 2008-02-14 | Mitsubishi Electric Corporation | Washing machine |
JP2008036225A (en) * | 2006-08-08 | 2008-02-21 | Mitsubishi Electric Corp | Washing machine |
JP2008073311A (en) * | 2006-09-22 | 2008-04-03 | Mitsubishi Electric Corp | Inclined-type washing machine |
JP2014104310A (en) * | 2012-11-30 | 2014-06-09 | Hitachi Appliances Inc | Washing machine |
JP2015062627A (en) * | 2013-09-26 | 2015-04-09 | パナソニック株式会社 | Washing machine |
-
2015
- 2015-08-25 JP JP2015166228A patent/JP2017042328A/en active Pending
-
2016
- 2016-08-25 WO PCT/CN2016/096690 patent/WO2017032327A1/en active Application Filing
- 2016-08-25 KR KR1020187008286A patent/KR20180042390A/en not_active Application Discontinuation
- 2016-08-25 US US15/755,517 patent/US20180245261A1/en not_active Abandoned
- 2016-08-25 EP EP16838585.4A patent/EP3342918A4/en not_active Withdrawn
- 2016-08-25 CN CN201680049026.2A patent/CN107923107B/en active Active
Also Published As
Publication number | Publication date |
---|---|
WO2017032327A1 (en) | 2017-03-02 |
US20180245261A1 (en) | 2018-08-30 |
EP3342918A4 (en) | 2019-04-10 |
CN107923107A (en) | 2018-04-17 |
KR20180042390A (en) | 2018-04-25 |
JP2017042328A (en) | 2017-03-02 |
CN107923107B (en) | 2020-11-10 |
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