WO2014147931A1 - Washing machine - Google Patents
Washing machine Download PDFInfo
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- WO2014147931A1 WO2014147931A1 PCT/JP2014/000324 JP2014000324W WO2014147931A1 WO 2014147931 A1 WO2014147931 A1 WO 2014147931A1 JP 2014000324 W JP2014000324 W JP 2014000324W WO 2014147931 A1 WO2014147931 A1 WO 2014147931A1
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- washing
- compression coil
- laundry
- coil spring
- vibration
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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
- D06F37/20—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
Definitions
- the present invention relates to a washing machine having a water tank supported by an outer frame in a vibration-proof manner.
- Patent Document 1 In a conventional washing machine, there has been proposed one that reduces vibration of a water tank that is supported in a vibration-proof manner inside the outer frame (see, for example, Patent Document 1).
- FIG. 3 is a view showing a longitudinal section of a conventional washing machine 200
- FIG. 4 is a sectional view showing a main part of a vibration isolator of the conventional washing machine 200.
- the conventional washing machine includes a water tank 120 that is elastically suspended from the upper part of the outer frame 128 via a suspension 129.
- a power transmission mechanism 121 is fixed to the bottom of the water tank 120.
- the power transmission mechanism 121 is connected to a motor 122 provided on the outer bottom portion of the water tank 120 via a belt.
- a stirring blade 124 that is rotatably provided at the inner bottom portion of the washing and dewatering tub 126 is fixed.
- a washing and dewatering tub 126 located in the water tub 120 is connected to the outer shaft 125.
- a fluid balancer 127 for reducing vibration is provided at the upper part of the washing and dewatering tank 126.
- the suspension 129 includes a suspension rod 130, a slider 131, a vibration isolation spring 132, and a spring support plate 133.
- a hemispherical suspension rod support part 134 is provided on the upper part of the outer frame 128.
- a sliding restriction wall 136 is provided on the outer periphery of the suspension rod support portion 134. The sliding regulation wall 136 is placed on the suspension rod support portion 134 and regulates the sliding range of the suspension rod support base 135 that slides on the spherical surface.
- the water tank 120 tends to vibrate greatly due to the unbalanced state of the clothes that are offset in the washing and dehydrating tank 126 in the washing process.
- the suspension rod support base 135 is restricted in movement by the sliding restriction wall 136 provided on the outer periphery of the suspension rod support portion 134. Thereby, the lateral vibration of the water tank 120 is reduced.
- the present invention solves the conventional problems, and provides a vibration isolator capable of stably suppressing vibrations at the time of resonance of a vibration system, particularly vibrations in the vertical direction, regardless of whether the laundry is light or heavy. It is an object to provide a washing machine having the same.
- a washing machine includes a washing / dehydrating tub for storing laundry, a water tub containing the washing / dehydrating tub, a vibration system including a vibration isolator for supporting the water tub on an outer frame, and an outer frame.
- the vibration isolator has a suspension including a compression coil spring.
- a compression coil spring has a long pitch part located in the center part of a compression coil spring, and a short pitch part located in the both ends of a compression coil spring.
- the maximum amplitude in the vertical direction when the vibration system resonates when there is no laundry in the washing / dehydrating tub is when the laundry is contained in the washing / dehydrating tub It is larger than the maximum amplitude in the vertical direction during resonance of the vibration system.
- FIG. 1 is a view showing a longitudinal section of a washing machine according to an embodiment of the present invention.
- FIG. 2 is a cross-sectional view showing a main part of the suspension of the washing machine in the embodiment of the present invention.
- FIG. 3 is a view showing a longitudinal section of a conventional washing machine.
- FIG. 4 is a cross-sectional view showing a main part of a conventional vibration isolator of a washing machine.
- FIG. 1 is a view showing a longitudinal section of a washing machine 100 according to an embodiment of the present invention.
- the washing machine 100 includes an outer frame 1, a water tank 2, a washing and dewatering tank 3, a motor 7, a support bar 8, and a suspension 9.
- the water tank 2 is supported by an anti-vibration device 19 including a support bar 8 and a suspension 9 from the corners of the outer frame 1.
- a washing / dehydrating tub 3 having a large number of small holes 6 for draining water is provided in the water tub 2 so as to be rotatable.
- the washing / dehydrating tub 3 includes a pulsator 4 for stirring clothes at the bottom of the center and a fluid balancer 5 for reducing dehydration vibration at the top.
- the motor 7 is provided on the outer bottom of the water tank 2.
- the motor 7 rotates the pulsator 4 during the washing process and the rinsing process, and rotates the washing / dehydrating tub 3 during the dehydration process.
- a lid 12 that covers the laundry input port 11 so as to be openable and closable is provided at a substantially central portion of the upper frame 10 provided on the upper part of the outer frame 1.
- FIG. 2 is a cross-sectional view showing a main part of the suspension 9 of the washing machine 100 according to the embodiment of the present invention.
- the suspension 9 has a cap 13 disposed at the lower end of the support bar 8, and the support bar 8 passes through the center of the cap 13. Further, the suspension 9 is provided with a slider 14. The slider 14 is in frictional contact with the cap 13 at the inner peripheral portion of the slider 14, and a damper force is generated. An air hole 15 is provided in the upper part of the slider 14. As the slider 14 moves up and down, air escapes and enters the air hole 15, thereby exhibiting a viscous damping effect.
- the suspension 9 includes an unequal pitch compression coil spring 16 positioned between the upper surface of the cap 13 and the inner upper surface of the slider 14.
- Short pitch portions 17 are formed at both ends of the compression coil spring 16.
- a long pitch portion 18 is formed in the central portion of the compression coil spring 16 in a range of about 1 ⁇ 2 of the total number of turns.
- the vertical vibration of the entire vibration system including the water tank 2 supported by the outer frame 1 and the vibration isolator 19 is considered to be a forced vibration with damping.
- the maximum amplitude A when the rotational speed of the dehydration reaches the resonance point of the vibration system is approximately expressed by (Equation 1) when the attenuation is considered to be small to some extent.
- f is a force applied to the suspension 9 including the compression coil spring 16
- k is a spring constant of the compression coil spring 16
- ⁇ is a damping coefficient.
- ⁇ c is a critical damping coefficient and is expressed by (Equation 2).
- amplitude A 1 is represented by equation (4).
- M is the weight of the unbalance
- r is the distance from the center of rotation of the unbalance
- (k / m) 1/2 is the angular velocity at the time of resonance
- y is the ratio that the centrifugal force generated during the unbalance is applied to the suspension.
- a 2 is A 1 or more.
- the maximum amplitude in the vertical direction during resonance when the laundry is contained is equal to or greater than the maximum amplitude in the vertical direction during resonance when the laundry is not contained.
- the vibration system reaches the bottom dead center, and a loud collision sound is emitted when the spring is in close contact.
- the washing machine may move due to the impact force.
- the washing machine 100 includes the washing / dehydrating tub 3 that accommodates the laundry, the water tub 2 that encloses the washing / dehydrating tub 3, and the vibration isolation that supports the water tub 2 on the outer frame 1.
- a vibration system including the device 19 and the outer frame 1 are provided.
- the vibration isolator 19 has a suspension 9 including a compression coil spring 16.
- the compression coil spring 16 has a long pitch portion 18 located at the center of the compression coil spring 16 and a short pitch portion 17 located at both ends of the compression coil spring 16.
- the spring constant of the compression coil spring 16 is k 1
- the weight supported by the suspension 9 is m 1
- the laundry is placed in the washing / dehydrating tub 3.
- the spring constant of the compression coil spring 16 k2 the recommended weight for suspension 9 is supported upon a m 2, satisfy (k 2 / k 1) ⁇ (m 2 / m 1).
- the spring constant of the long pitch portion 18 is larger than the spring constant of the short pitch portion 17.
- the length of the long pitch portion 18 is 1 ⁇ 2 of the length of the compression coil spring 16.
- the washing machine according to the present invention can stably suppress vibration at the time of resonance of the vibration system, in particular, vibration in the vertical direction, regardless of the weight of the laundry. Abnormal vibration can be suppressed. Therefore, the present invention can be applied to other types of washing machines having a vibration system supported by vibration isolation.
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
Abstract
A washing machine (100) is provided with: a vibrating system which includes a wash and spin tub (3) which holds laundry, a water tub (2) which surrounds the wash and spin tub (3), and a vibration damping device (19) which supports the water tub (2) in an outer frame (1); and the outer frame (1). The vibration damping device (19) has a suspension (9) which includes a compression coil spring (16). The compression coil spring (16) has a long pitch portion (18) at the center portion of the compression coil spring (16), and short pitch portions (17) at both ends of the compression coil spring (16). When the vibrating system performs vibration that includes the vertical direction, the maximum amplitude in the vertical direction at resonation time of the vibrating system if there is no laundry in the wash and spin tub (3) is greater than the maximum amplitude in the vertical direction at resonation time of the vibrating system if there is laundry in the wash and spin tub (3).
Description
本発明は、外枠に防振支持された水槽を有する洗濯機に関する。
The present invention relates to a washing machine having a water tank supported by an outer frame in a vibration-proof manner.
従来の洗濯機において、外枠内部に防振支持された水槽の振動を低減するものが提案されている（例えば、特許文献１を参照）。
In a conventional washing machine, there has been proposed one that reduces vibration of a water tank that is supported in a vibration-proof manner inside the outer frame (see, for example, Patent Document 1).
図３は、従来の洗濯機２００の縦断面を示す図であり、図４は、従来の洗濯機２００の防振装置の要部を示す断面図である。
FIG. 3 is a view showing a longitudinal section of a conventional washing machine 200, and FIG. 4 is a sectional view showing a main part of a vibration isolator of the conventional washing machine 200.
図３、図４に示すように、従来の洗濯機は、サスペンション１２９を介して、外枠１２８の上部から弾性的に吊り下げられた水槽１２０を備えている。水槽１２０の底部には、動力伝達機構１２１が固着されている。この動力伝達機構１２１は、ベルトを介して、水槽１２０の外底部に設けられたモータ１２２と連結されている。動力伝達機構１２１の内側に設けられた攪拌翼軸１２３には、洗濯兼脱水槽１２６内底部に回転自在に設けられた攪拌翼１２４が固定されている。外側の軸１２５には、水槽１２０内に位置する洗濯兼脱水槽１２６が連結されている。また、洗濯兼脱水槽１２６の上部には、振動低減用の流体バランサー１２７が設けられている。
3 and 4, the conventional washing machine includes a water tank 120 that is elastically suspended from the upper part of the outer frame 128 via a suspension 129. A power transmission mechanism 121 is fixed to the bottom of the water tank 120. The power transmission mechanism 121 is connected to a motor 122 provided on the outer bottom portion of the water tank 120 via a belt. On the stirring blade shaft 123 provided inside the power transmission mechanism 121, a stirring blade 124 that is rotatably provided at the inner bottom portion of the washing and dewatering tub 126 is fixed. A washing and dewatering tub 126 located in the water tub 120 is connected to the outer shaft 125. In addition, a fluid balancer 127 for reducing vibration is provided at the upper part of the washing and dewatering tank 126.
サスペンション１２９は、吊り棒１３０、スライダー１３１、防振ばね１３２、および、ばね支持板１３３から構成されている。そして、外枠１２８の上部には、半球状の吊り棒支持部１３４が設けられている。また、吊り棒支持部１３４の外周には、摺動規制壁１３６が設けられている。摺動規制壁１３６は、吊り棒支持部１３４に載置され、球面摺動する吊り棒支持台１３５の摺動範囲を規制する。
The suspension 129 includes a suspension rod 130, a slider 131, a vibration isolation spring 132, and a spring support plate 133. A hemispherical suspension rod support part 134 is provided on the upper part of the outer frame 128. In addition, a sliding restriction wall 136 is provided on the outer periphery of the suspension rod support portion 134. The sliding regulation wall 136 is placed on the suspension rod support portion 134 and regulates the sliding range of the suspension rod support base 135 that slides on the spherical surface.
上述した従来の構成においては、洗い工程終了後の脱水工程の起動時に、水槽１２０は、洗い工程で洗濯兼脱水槽１２６内に片寄った衣類のアンバランス状態により、大きく横振動しようとする。この時、吊り棒支持部１３４の外周に設けた摺動規制壁１３６によって、吊り棒支持台１３５は、動きの規制を受ける。これにより、水槽１２０の横振動が低減される。
In the above-described conventional configuration, when the dehydration process is started after the washing process is finished, the water tank 120 tends to vibrate greatly due to the unbalanced state of the clothes that are offset in the washing and dehydrating tank 126 in the washing process. At this time, the suspension rod support base 135 is restricted in movement by the sliding restriction wall 136 provided on the outer periphery of the suspension rod support portion 134. Thereby, the lateral vibration of the water tank 120 is reduced.
しかしながら、従来の構成においては、洗濯機が大型化し、洗濯物の容量が増えると、脱水回転数が、外枠から防振支持された水槽を含む振動系の共振点に達した場合、振動系は横揺れよりも、むしろ上下振動が大きくなる。特に、上下振動が下死点に達したときに、防振装置のばねが密着状態になってしまいやすい。そのような場合は、ばねの密着時に大きな衝突音を発し、洗濯機がその衝撃力で移動してしまう、という課題がある。
However, in the conventional configuration, when the washing machine is increased in size and the capacity of the laundry is increased, the dehydration rotation speed reaches the resonance point of the vibration system including the water tank supported by vibration isolation from the outer frame. Rise up and down rather than roll. In particular, when the vertical vibration reaches the bottom dead center, the spring of the vibration isolator tends to come into close contact. In such a case, there is a problem that a loud collision sound is generated when the spring is in close contact, and the washing machine moves with the impact force.
本発明は、従来の課題を解決するもので、洗濯物の重量が軽くても重くても、振動系の共振時の振動、特に上下方向の振動を安定して抑えることができる防振装置を有する洗濯機を提供することを、目的とする。
The present invention solves the conventional problems, and provides a vibration isolator capable of stably suppressing vibrations at the time of resonance of a vibration system, particularly vibrations in the vertical direction, regardless of whether the laundry is light or heavy. It is an object to provide a washing machine having the same.
本発明の洗濯機は、洗濯物を収容する洗濯兼脱水槽と、洗濯兼脱水槽を内包する水槽と、水槽を外枠に支持する防振装置とを含む振動系と、外枠と、を備える。防振装置は圧縮コイルばねを含むサスペンションを有する。圧縮コイルばねは、圧縮コイルばねの中央部に位置する長いピッチ部と、圧縮コイルばねの両端に位置する短いピッチ部を有する。振動系が上下方向を含む振動をするとき、洗濯兼脱水槽に洗濯物が入っていない場合の振動系の共振時の上下方向の最大振幅は、洗濯兼脱水槽に洗濯物が入っている場合の振動系の共振時の上下方向の最大振幅より大きい。
A washing machine according to the present invention includes a washing / dehydrating tub for storing laundry, a water tub containing the washing / dehydrating tub, a vibration system including a vibration isolator for supporting the water tub on an outer frame, and an outer frame. Prepare. The vibration isolator has a suspension including a compression coil spring. A compression coil spring has a long pitch part located in the center part of a compression coil spring, and a short pitch part located in the both ends of a compression coil spring. When the vibration system vibrates including the vertical direction, the maximum amplitude in the vertical direction when the vibration system resonates when there is no laundry in the washing / dehydrating tub is when the laundry is contained in the washing / dehydrating tub It is larger than the maximum amplitude in the vertical direction during resonance of the vibration system.
これによって、洗濯物の重量が軽くても重くても、洗濯機の外枠から防振装置にて防振支持された振動系の共振時の振動、特に上下方向の振動を安定して抑えることができ、脱水運転時の異常音・異常振動を抑えることができる。
This makes it possible to stably suppress vibrations at the time of resonance of the vibration system supported by the vibration isolator from the outer frame of the washing machine, particularly vibrations in the vertical direction, regardless of whether the laundry is light or heavy. It is possible to suppress abnormal noise and vibration during dehydration operation.
以下、本発明の実施の形態について、図面を参照しながら説明する。なお、この実施の形態によって、本発明が限定されるものではない。
Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.
図１は、本発明の実施の形態における洗濯機１００の縦断面を示す図である。
FIG. 1 is a view showing a longitudinal section of a washing machine 100 according to an embodiment of the present invention.
洗濯機１００は、外枠１と、水槽２と、洗濯兼脱水槽３と、モータ７と、支持棒８と、サスペンション９とを備えている。図１において、水槽２は、外枠１の角隅から、支持棒８およびサスペンション９を含む防振装置１９により防振支持されている。水槽２内部には、側壁に水抜き用の多数の小穴６を有する洗濯兼脱水槽３が回転自在に設けられている。この洗濯兼脱水槽３は、中央部底部に衣類攪拌用のパルセータ４を、上部には脱水振動低減用の流体バランサー５を備えている。
The washing machine 100 includes an outer frame 1, a water tank 2, a washing and dewatering tank 3, a motor 7, a support bar 8, and a suspension 9. In FIG. 1, the water tank 2 is supported by an anti-vibration device 19 including a support bar 8 and a suspension 9 from the corners of the outer frame 1. A washing / dehydrating tub 3 having a large number of small holes 6 for draining water is provided in the water tub 2 so as to be rotatable. The washing / dehydrating tub 3 includes a pulsator 4 for stirring clothes at the bottom of the center and a fluid balancer 5 for reducing dehydration vibration at the top.
モータ７は、水槽２の外底部に設けられている。モータ７は、洗い工程時及びすすぎ工程時にはパルセータ４を、脱水工程時には洗濯兼脱水槽３を回転させる。
The motor 7 is provided on the outer bottom of the water tank 2. The motor 7 rotates the pulsator 4 during the washing process and the rinsing process, and rotates the washing / dehydrating tub 3 during the dehydration process.
また、外枠１上部に設けられた上部枠体１０の略中央部には、洗濯物投入口１１を開閉自在に覆う蓋１２が設けられている。
Also, a lid 12 that covers the laundry input port 11 so as to be openable and closable is provided at a substantially central portion of the upper frame 10 provided on the upper part of the outer frame 1.
図２は、本発明の実施の形態における洗濯機１００のサスペンション９の要部を示す断面図である。
FIG. 2 is a cross-sectional view showing a main part of the suspension 9 of the washing machine 100 according to the embodiment of the present invention.
図２において、サスペンション９には、支持棒８の下端にキャップ１３が配置されており、支持棒８がキャップ１３の中央部を貫通している。さらに、サスペンション９には、スライダー１４が設けられている。スライダー１４は、キャップ１３と、スライダー１４の内周部において摩擦接触し、ダンパー力が発生させられる。また、スライダー１４の上部に、空気穴１５が設けられている。スライダー１４の上下動によって、空気穴１５から空気が抜けたり入ったりすることで、粘性減衰効果が発揮される。
In FIG. 2, the suspension 9 has a cap 13 disposed at the lower end of the support bar 8, and the support bar 8 passes through the center of the cap 13. Further, the suspension 9 is provided with a slider 14. The slider 14 is in frictional contact with the cap 13 at the inner peripheral portion of the slider 14, and a damper force is generated. An air hole 15 is provided in the upper part of the slider 14. As the slider 14 moves up and down, air escapes and enters the air hole 15, thereby exhibiting a viscous damping effect.
サスペンション９は、キャップ１３上面とスライダー１４内部上面との間に位置する、不等ピッチ状の圧縮コイルばね１６を含んでいる。圧縮コイルばね１６の両端部には、短いピッチ部１７が形成されている。圧縮コイルばね１６の中央部には、全体の巻き数の約１／２の範囲に、長いピッチ部１８が形成されている。これにより、洗濯兼脱水槽３内に投入された洗濯物が少ない時は、ばね定数が小さい短いピッチ部１７だけが圧縮され、洗濯物が多い時は、短いピッチ部１７が圧縮されると共に、ばね定数が大きい長いピッチ部１８が圧縮される（ばね定数は有効巻数に反比例する）。また、圧縮コイルばね１６の自由長は、洗濯兼脱水槽３に水も洗濯物も入っていない無負荷状態の時に、適度な減衰力が得られるように、キャップ１３が、スライダー１４の内部に下から若干入り込む程度の長さに、設定されている。
The suspension 9 includes an unequal pitch compression coil spring 16 positioned between the upper surface of the cap 13 and the inner upper surface of the slider 14. Short pitch portions 17 are formed at both ends of the compression coil spring 16. A long pitch portion 18 is formed in the central portion of the compression coil spring 16 in a range of about ½ of the total number of turns. Thereby, when the laundry put into the washing and dewatering tub 3 is small, only the short pitch portion 17 having a small spring constant is compressed, and when the laundry is large, the short pitch portion 17 is compressed, The long pitch portion 18 having a large spring constant is compressed (the spring constant is inversely proportional to the effective number of turns). Further, the free length of the compression coil spring 16 is such that the cap 13 is placed inside the slider 14 so that an appropriate damping force can be obtained when the washing and dewatering tub 3 is not loaded with water or laundry. The length is set so as to enter slightly from below.
以上のように構成された洗濯機１００において、以下にその動作、作用を説明する。
In the washing machine 100 configured as described above, the operation and action will be described below.
脱水工程において、外枠１と防振装置１９とにより防振支持された水槽２を含む振動系全体の上下振動を、減衰のある強制振動と考える。脱水回転数が、振動系の共振点に達した時の最大振幅Ａは、減衰がある程度小さいと考えると、ほぼ、（数１）で表される。
In the dehydration process, the vertical vibration of the entire vibration system including the water tank 2 supported by the outer frame 1 and the vibration isolator 19 is considered to be a forced vibration with damping. The maximum amplitude A when the rotational speed of the dehydration reaches the resonance point of the vibration system is approximately expressed by (Equation 1) when the attenuation is considered to be small to some extent.
ここで、ｆは圧縮コイルばね１６を含むサスペンション９にかかる力、ｋは圧縮コイルばね１６のばね定数、εは減衰係数である。εｃは臨界減衰係数であり、（数２）で表される。
Here, f is a force applied to the suspension 9 including the compression coil spring 16, k is a spring constant of the compression coil spring 16, and ε is a damping coefficient. ε c is a critical damping coefficient and is expressed by (Equation 2).
ここで、ｍはサスペンション９が支持している重量である。従って、（数２）を（数１）に代入すると、（数３）が得られる。
Where m is the weight supported by the suspension 9. Therefore, when (Equation 2) is substituted into (Equation 1), (Equation 3) is obtained.
ここで、洗濯物が入っていない場合における、ばね定数をｋ１、サスペンション９が支持している重量をｍ１、サスペンション９にかかる力ｆ１とすると、その場合の共振時の上下方向の最大振幅Ａ１は、（数４）で表される。
Here, when there is no laundry, the spring constant is k 1 , the weight supported by the suspension 9 is m 1 , and the force f 1 applied to the suspension 9 is the maximum in the vertical direction at the time of resonance in that case. amplitude A 1 is represented by equation (4).
また、洗濯物が入っている場合における、ばね定数をｋ２、サスペンション９が支持している重量をｍ２、サスペンション９にかかる力ｆ２とすると、その場合の共振時の上下方向の最大振幅Ａ２は、（数５）で表される。
Further, when the laundry is contained, if the spring constant is k 2 , the weight supported by the suspension 9 is m 2 , and the force f 2 applied to the suspension 9 is the maximum amplitude in the vertical direction at resonance in that case. A 2 is expressed by (Equation 5).
（数４）と（数５）より、（数６）が得られる。
(Equation 6) is obtained from (Equation 4) and (Equation 5).
ここで、ｆ１とｆ２は、共振時にかかる力であるので、（数７）と（数８）で表される。
Here, since f 1 and f 2 are forces applied at the time of resonance, they are expressed by (Equation 7) and (Equation 8).
ここで、Ｍはアンバランスの重量、ｒはアンバランスの回転中心からの距離、（ｋ／ｍ）１／２は共振時の角速度、ｙは、アンバランス時に生じる遠心力がサスペンションにかかる割合を表す。Ｍとｒとｙは、洗濯物が入っていない場合、および、洗濯物が入っている場合のいずれも、同じである。（数７）と（数８）より、（数９）が得られる。
Where M is the weight of the unbalance, r is the distance from the center of rotation of the unbalance, (k / m) 1/2 is the angular velocity at the time of resonance, and y is the ratio that the centrifugal force generated during the unbalance is applied to the suspension. To express. M, r, and y are the same when there is no laundry and when there is laundry. From (Equation 7) and (Equation 8), (Equation 9) is obtained.
（数９）を（数６）に代入すると、（数１０）が得られる。
Substituting (Equation 9) into (Equation 6) gives (Equation 10).
（数１０）を変形すると、（数１１）が得られる。
(Formula 11) is obtained by transforming (Formula 10).
（数１１）からわかるように、（ｋ２／ｋ１）＜（ｍ２／ｍ１）の場合、Ａ２はＡ１より小さくなる。Ａ２がＡ１より小さい時、ばねが密着しにくく、密着時の衝突音や、その衝撃による洗濯機の移動を防止できる。
As can be seen from (Equation 11), when (k 2 / k 1 ) <(m 2 / m 1 ), A 2 is smaller than A 1 . When A 2 is smaller than A 1 , the spring is less likely to be in close contact, and a collision sound at the time of close contact and movement of the washing machine due to the impact can be prevented.
また、この時、荷重の小さい定常脱水運転の場合は、ばね定数が小さい短いピッチ部１７だけが圧縮されるため、本体の振動は小さい。また、荷重が大きい場合でも、ばね定数が大きい長いピッチ部１８による反発は小さく、振動系の共振時の振幅は荷重が小さい場合よりも小さい。また、長いピッチ部１８はピッチを長くしているので、密着しにくく、密着時の衝突音や、その衝撃による洗濯機の移動を防止できる。
Also, at this time, in the case of steady dehydration operation with a small load, only the short pitch portion 17 with a small spring constant is compressed, so the vibration of the main body is small. Even when the load is large, the repulsion due to the long pitch portion 18 having a large spring constant is small, and the amplitude at the time of resonance of the vibration system is smaller than that when the load is small. Moreover, since the long pitch part 18 makes the pitch long, it is hard to adhere | attach and can prevent the movement of the washing machine by the impact sound at the time of contact | adherence, and the impact.
一方、（ｋ２／ｋ１）≧（ｍ２／ｍ１）の場合、Ａ２はＡ１以上となる。この時、洗濯物が入っている場合の共振時の上下方向の最大振幅は、洗濯物が入っていない場合の共振時の上下方向の最大振幅と同じか、より大きくなる。これにより、振動系が下死点に達し、ばねの密着時に大きな衝突音が発せられる。さらに、その衝撃力で、洗濯機が移動する時もある。
On the other hand, when (k 2 / k 1 ) ≧ (m 2 / m 1 ), A 2 is A 1 or more. At this time, the maximum amplitude in the vertical direction during resonance when the laundry is contained is equal to or greater than the maximum amplitude in the vertical direction during resonance when the laundry is not contained. As a result, the vibration system reaches the bottom dead center, and a loud collision sound is emitted when the spring is in close contact. Furthermore, the washing machine may move due to the impact force.
従って、Ａ２がＡ１より小さくなるように、（ｋ２／ｋ１）＜（ｍ２／ｍ１）であることが好ましい。
Therefore, it is preferable that (k 2 / k 1 ) <(m 2 / m 1 ) so that A 2 is smaller than A 1 .
以上のように、本実施の形態の洗濯機１００は、洗濯物を収容する洗濯兼脱水槽３と、洗濯兼脱水槽３を内包する水槽２と、水槽２を外枠１に支持する防振装置１９とを含む振動系と、外枠１と、を備える。防振装置１９は圧縮コイルばね１６を含むサスペンション９を有する。圧縮コイルばね１６は、圧縮コイルばね１６の中央部に位置する長いピッチ部１８と、圧縮コイルばね１６の両端に位置する短いピッチ部１７を有する。振動系が上下方向を含む振動をするとき、洗濯兼脱水槽３に洗濯物が入っていない場合の振動系の共振時の上下方向の最大振幅は、洗濯兼脱水槽３に洗濯物が入っている場合の振動系の共振時の上下方向の最大振幅より大きい。これにより、洗濯兼脱水槽３に投入された洗濯物の重量が軽くても重くても、外枠１から防振装置１９にて防振支持された振動系の共振時の振動、特に上下方向の振動を安定して抑えることができ、脱水運転時の異常音・異常振動を抑えることができる。
As described above, the washing machine 100 according to the present embodiment includes the washing / dehydrating tub 3 that accommodates the laundry, the water tub 2 that encloses the washing / dehydrating tub 3, and the vibration isolation that supports the water tub 2 on the outer frame 1. A vibration system including the device 19 and the outer frame 1 are provided. The vibration isolator 19 has a suspension 9 including a compression coil spring 16. The compression coil spring 16 has a long pitch portion 18 located at the center of the compression coil spring 16 and a short pitch portion 17 located at both ends of the compression coil spring 16. When the vibration system vibrates including the vertical direction, the maximum amplitude in the vertical direction when the vibration system resonates when there is no laundry in the washing / dehydrating tub 3 is that the laundry is contained in the washing / dehydrating tub 3. Greater than the maximum vertical amplitude during resonance of the vibration system. Thereby, even when the weight of the laundry put into the washing / dehydrating tub 3 is light or heavy, vibration at the time of resonance of the vibration system supported by the vibration isolator 19 from the outer frame 1 is supported, particularly in the vertical direction. Can be stably suppressed, and abnormal noise and vibration during dehydration operation can be suppressed.
また、洗濯兼脱水槽に洗濯物が入っていない場合、圧縮コイルばね１６のばね定数をｋ１、サスペンション９が支持している重量をｍ１とし、洗濯兼脱水槽３に洗濯物が入っている場合、圧縮コイルばね１６のばね定数をｋ２、サスペンション９が支持している重量をｍ２としたときに、（ｋ２／ｋ１）＜（ｍ２／ｍ１）を満たす。これにより、洗濯兼脱水槽３に投入された洗濯物の重量が軽くても重くても、外枠１から防振装置１９にて防振支持された振動系の共振時の振動、特に上下方向の振動を安定して抑えることができ、脱水運転時の異常音・異常振動を抑えることができる。
Further, when there is no laundry in the washing / dehydrating tub, the spring constant of the compression coil spring 16 is k 1 , the weight supported by the suspension 9 is m 1 , and the laundry is placed in the washing / dehydrating tub 3. If you are, the spring constant of the compression coil spring 16 k2, the recommended weight for suspension 9 is supported upon a m 2, satisfy (k 2 / k 1) < (m 2 / m 1). Thereby, even when the weight of the laundry put into the washing / dehydrating tub 3 is light or heavy, vibration at the time of resonance of the vibration system supported by the vibration isolator 19 from the outer frame 1 is supported, particularly in the vertical direction. Can be stably suppressed, and abnormal noise and vibration during dehydration operation can be suppressed.
また、長いピッチ部１８のばね定数は、短いピッチ部１７のばね定数よりも大きい。これにより、荷重が大きい場合でも、ばね定数が大きい長いピッチ部１８による反発は小さく、振動系の共振時の振動は荷重が小さい場合よりも小さい。
Further, the spring constant of the long pitch portion 18 is larger than the spring constant of the short pitch portion 17. Thereby, even when the load is large, the repulsion due to the long pitch portion 18 having a large spring constant is small, and the vibration during resonance of the vibration system is smaller than when the load is small.
また、長いピッチ部１８の長さは、圧縮コイルばね１６の長さの１／２である。これにより、洗濯兼脱水槽３内に投入された洗濯物が少ない時は、ばね定数が小さい短いピッチ部１７だけが圧縮され、洗濯物が多い時は、短いピッチ部１７が圧縮されると共に、ばね定数が大きい長いピッチ部１８が圧縮される。
Further, the length of the long pitch portion 18 is ½ of the length of the compression coil spring 16. Thereby, when the laundry put into the washing and dewatering tub 3 is small, only the short pitch portion 17 having a small spring constant is compressed, and when the laundry is large, the short pitch portion 17 is compressed, The long pitch portion 18 having a large spring constant is compressed.
以上のように、本発明にかかる洗濯機は、洗濯物の重量に関わらず、振動系の共振時の振動、特に上下方向の振動を安定して抑えることができ、脱水運転時の異常音・異常振動を抑えることができる。従って、防振支持された振動系を有する他の方式の洗濯機にも適用できる。
As described above, the washing machine according to the present invention can stably suppress vibration at the time of resonance of the vibration system, in particular, vibration in the vertical direction, regardless of the weight of the laundry. Abnormal vibration can be suppressed. Therefore, the present invention can be applied to other types of washing machines having a vibration system supported by vibration isolation.
１ 外枠
２ 水槽
３ 洗濯兼脱水槽
４ パルセータ
５ 流体バランサー
６ 小穴
７ モータ
８ 支持棒
９ サスペンション
１０ 上部枠体
１１ 洗濯物投入口
１２ 蓋
１３ キャップ
１４ スライダー
１５ 空気穴
１６ 圧縮コイルばね
１７ 短いピッチ部
１８ 長いピッチ部
１９ 防振装置
１００ 洗濯機 DESCRIPTION OFSYMBOLS 1 Outer frame 2 Water tank 3 Washing and dewatering tank 4 Pulsator 5 Fluid balancer 6 Small hole 7 Motor 8 Support rod 9 Suspension 10 Upper frame 11 Laundry inlet 12 Lid 13 Cap 14 Slider 15 Air hole 16 Compression coil spring 17 Short pitch part 18 Long pitch section 19 Vibration isolator 100 Washing machine
２ 水槽
３ 洗濯兼脱水槽
４ パルセータ
５ 流体バランサー
６ 小穴
７ モータ
８ 支持棒
９ サスペンション
１０ 上部枠体
１１ 洗濯物投入口
１２ 蓋
１３ キャップ
１４ スライダー
１５ 空気穴
１６ 圧縮コイルばね
１７ 短いピッチ部
１８ 長いピッチ部
１９ 防振装置
１００ 洗濯機 DESCRIPTION OF
Claims (4)
- 洗濯物を収容する洗濯兼脱水槽と、前記洗濯兼脱水槽を内包する水槽と、前記水槽を前記外枠に支持する防振装置とを含む振動系と、
外枠と、
を備える洗濯機であって、
前記防振装置は、圧縮コイルばねを含むサスペンションを有し、
前記圧縮コイルばねは、前記圧縮コイルばねの中央部に位置する長いピッチ部と、前記圧縮コイルばねの両端に位置する短いピッチ部とを有し、
前記振動系が上下方向を含む振動をするとき、
前記洗濯兼脱水槽に洗濯物が入っていない場合の前記振動系の共振時の上下方向の最大振幅は、前記洗濯兼脱水槽に洗濯物が入っている場合の前記振動系の共振時の上下方向の最大振幅より大きい洗濯機。 A vibration system including a washing / dehydrating tub for storing laundry, a water tub containing the washing / dehydrating tub, and a vibration isolator for supporting the water tub on the outer frame;
An outer frame,
A washing machine comprising:
The vibration isolator has a suspension including a compression coil spring,
The compression coil spring has a long pitch portion located at a central portion of the compression coil spring and a short pitch portion located at both ends of the compression coil spring,
When the vibration system vibrates including the vertical direction,
The maximum vertical amplitude at the time of resonance of the vibration system when no laundry is contained in the washing / dehydrating tank is the vertical amplitude at the time of resonance of the vibration system when laundry is contained in the washing / dehydrating tank. Washing machine greater than the maximum amplitude of direction. - 前記洗濯兼脱水槽に洗濯物が入っていない場合、前記圧縮コイルばねのばね定数をｋ１、前記サスペンションが支持している重量をｍ１とし、前記洗濯兼脱水槽に洗濯物が入っている場合、前記圧縮コイルばねのばね定数をｋ２、前記サスペンションが支持している重量をｍ２としたときに、
（ｋ２／ｋ１）＜（ｍ２／ｍ１）を満たす請求項１に記載の洗濯機。 When there is no laundry in the washing / dehydrating tub, the spring constant of the compression coil spring is k 1 , the weight supported by the suspension is m 1, and the laundry is contained in the washing / dehydrating tub. When the spring constant of the compression coil spring is k 2 and the weight supported by the suspension is m 2 ,
(K 2 / k 1) <washing machine according to claim 1 that satisfies (m 2 / m 1). - 前記長いピッチ部のばね定数は、前記短いピッチ部のばね定数よりも大きい請求項１または２に記載の洗濯機。 The washing machine according to claim 1 or 2, wherein a spring constant of the long pitch portion is larger than a spring constant of the short pitch portion.
- 前記長いピッチ部の長さは、前記圧縮コイルばねの長さの１／２である請求項１から３のいずれかに記載の洗濯機。 4. The washing machine according to claim 1, wherein a length of the long pitch portion is ½ of a length of the compression coil spring. 5.
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| US20160010259A1 (en) * | 2014-07-11 | 2016-01-14 | Lg Electronics Inc. | Washing machine |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04144594A (en) * | 1990-10-03 | 1992-05-19 | Matsushita Electric Ind Co Ltd | Vibration isolator of washing machine |
| JPH11253690A (en) * | 1998-03-11 | 1999-09-21 | Toshiba Corp | Fully automatic washing machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04144594A (en) * | 1990-10-03 | 1992-05-19 | Matsushita Electric Ind Co Ltd | Vibration isolator of washing machine |
| JPH11253690A (en) * | 1998-03-11 | 1999-09-21 | Toshiba Corp | Fully automatic washing machine |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160010259A1 (en) * | 2014-07-11 | 2016-01-14 | Lg Electronics Inc. | Washing machine |
| US9951454B2 (en) * | 2014-07-11 | 2018-04-24 | Lg Electronics Inc. | Washing machine |
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