JPS633635B2 - - Google Patents

Description

【発明の詳細な説明】 本発明は洗い及び脱水兼用の洗い槽の内底部に
洗い軸の回転をパルセータに伝達する歯車機構を
配設した洗濯機に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a washing machine in which a gear mechanism for transmitting rotation of a washing shaft to a pulsator is disposed at the inner bottom of a washing tub for both washing and dehydration.

従来より、例えば洗濯効果の向上を目的として
パルセータを回転槽の内底部に偏心して配置し、
このパルセータを洗い軸により歯車機構を介して
回転駆動する構成の脱水兼用洗濯機が考えられて
いる。しかしながら斯かる構成では歯車機構が洗
い水中に没するようになることから、歯車機構の
油潤滑ができないという事情があり、更には洗い
水中に含まれる砂、泥等の異物が歯車機構に噛み
込まれて歯車のロツクや異常摩耗を引き起こし易
いという問題があつて、これがためにこの種の洗
濯機は未だ実用化されるに至らないというのが実
情であつた。 Conventionally, for example, a pulsator has been placed eccentrically at the inner bottom of a rotating tank in order to improve the washing effect.
A dehydrating/washing machine has been proposed in which the pulsator is rotationally driven by a washing shaft via a gear mechanism. However, in such a configuration, the gear mechanism is submerged in the washing water, making it impossible to lubricate the gear mechanism with oil, and furthermore, foreign matter such as sand and mud contained in the washing water may get caught in the gear mechanism. However, this type of washing machine has not yet been put into practical use because of the problem that the washing machine tends to lock up and cause abnormal wear of the gears.

そこで、本発明の目的は、歯車機構の油潤滑と
歯車機構への異物侵入の防止とを伴せて図り得、
もつて実用化に際しての問題を解消し得る洗濯機
を提供するにある。 Therefore, an object of the present invention is to achieve oil lubrication of a gear mechanism and prevention of foreign matter from entering the gear mechanism.
It is an object of the present invention to provide a washing machine that can solve problems in practical use.

以下本発明の一実施例につき第１図乃至第４図
を参照して説明する。 An embodiment of the present invention will be described below with reference to FIGS. 1 to 4.

まず、全体構成の概略を示す第１図において、
１は例えば脱水兼用洗濯機の外箱で、これは水受
槽２を内設している。３は水受槽２内に配設した
洗い槽及び脱水槽兼用の回転槽で、これは上方に
いくに従い若干拡開するテーパ状をなすと共に、
上端開口部に装着したバランスリング４との間に
排水間隙５を形成した無孔状をなし、内部に洗い
水を直接貯留するようになつている。次に、前記
回転槽３の支持構造等を示す第２図において、６
は水受槽２の下方に配設した図示しない駆動装置
のハウジングで、これは図示しない弾性吊持機構
の吊り棒を介して外箱１内に支持されている。７
はハウジング６の上端部に取着したケーシング、
８はハウジング６内に回転可能に挿通支持した中
空の脱水軸で、この脱水軸８の上端部には前記ケ
ーシング７から突出させるようにして連結用の筒
軸９を圧入してある。１０，１１は共にケーシン
グ７と筒軸９との間を水密に保つシール部材であ
る。１２は洗い軸で、これは脱水軸８内に回転可
能に挿通支持され、上端部は筒軸９を挿通して上
方に突出している。そして、図示はしないが、こ
の洗い軸１２及び脱水軸８はクラツチ機構を介し
てモータに連結され、クラツチ機構の作用により
モータの回転力が選択的に伝達されるようになつ
ている。一方、１３は回転槽３の底部にその中心
から所要量偏心して形成した円形の凹所で、この
凹所１３のうち回転槽３の中心に相当する部位に
は前記筒軸９を挿通させる比較的径大な開口部１
４を形成している。１５は回転槽３の外底部に固
定した補強底板で、これは略中央に形成した嵌合
孔１６に前記筒軸９の上端部を挿通させて筒軸９
に固定されており、これにより回転槽３を前記脱
水軸８に直結状態にしている。 First, in Figure 1, which shows an outline of the overall configuration,
Reference numeral 1 denotes, for example, an outer box of a washing machine that also serves as a dehydrator and has a water receiving tank 2 installed therein. Reference numeral 3 denotes a rotating tank that serves as both a washing tank and a dehydration tank, which is installed in the water receiving tank 2, and has a tapered shape that widens slightly as it goes upward.
It has a non-porous shape with a drainage gap 5 formed between it and a balance ring 4 attached to the upper opening, so that washing water can be directly stored inside. Next, in FIG. 2 showing the support structure etc. of the rotating tank 3, 6
Reference numeral denotes a housing of a drive device (not shown) disposed below the water receiving tank 2, which is supported within the outer box 1 via a hanging rod of an elastic suspension mechanism (not shown). 7
is a casing attached to the upper end of the housing 6,
Reference numeral 8 denotes a hollow dewatering shaft rotatably inserted and supported within the housing 6, and a cylindrical shaft 9 for connection is press-fitted into the upper end of the dehydrating shaft 8 so as to project from the casing 7. Both 10 and 11 are sealing members that keep the space between the casing 7 and the cylinder shaft 9 watertight. Reference numeral 12 denotes a washing shaft, which is rotatably inserted and supported within the dewatering shaft 8, and whose upper end portion passes through the cylindrical shaft 9 and projects upward. Although not shown, the washing shaft 12 and the dewatering shaft 8 are connected to a motor via a clutch mechanism, and the rotational force of the motor is selectively transmitted by the action of the clutch mechanism. On the other hand, reference numeral 13 denotes a circular recess formed at the bottom of the rotary tank 3 by a required amount of eccentricity from the center. Large diameter opening 1
4 is formed. Reference numeral 15 denotes a reinforcing bottom plate fixed to the outer bottom of the rotary tank 3, which is inserted into a fitting hole 16 formed approximately in the center so that the upper end of the cylindrical shaft 9 is inserted into the cylindrical shaft 9.
The rotary tank 3 is thereby directly connected to the dewatering shaft 8.

さて、１７は凹所１３内に配置した密閉ケース
で、これは蓋側ケース１８及び底側ケース１９か
ら成り、蓋側及び底側の両ケース１８，１９の略
中心には夫々受筒部２０及び受凹部２１を形成す
ると共に、底側ケース１９には受凹部２１から所
定距離離間して透孔２２を形成し、且つこの透孔
２２を取り巻くようにして嵌合筒部２３が下方に
向けて突設されている。そして、この密閉ケース
１８の底側ケース１９は、その嵌合筒部２３がパ
ツキン２４を介して筒軸９の上端部に嵌合されて
いる。尚、このパツキン２４は嵌合筒部２３と筒
軸９との間だけでなく、洗い軸１２と筒軸９との
間をも一体にシールするように形成してある（第
３図参照）。２５は駆動歯車で、これは底側ケー
ス１９の透孔２２を挿通して上方に突出する洗い
軸１２の上端部にねじ止めしてある。２６は駆動
歯車２５に直接噛合してこれと共に歯車機構２７
を構成する内歯車で、これはそのボス部２６ａと
歯部２６ｂとを連結部たる端板部２６ｃにより一
体に連接して成ると共に、枢軸２８がボス部２６
ａにインサート成形により一体に取着されてい
る。斯かる内歯車２６は、その枢軸２８の上端部
及び下端部が夫々蓋側及び底側の両ケース１８，
１９の受筒部２０及び受凹部２１に軸受２９及び
３０を介して回転可能に支持されている。３１は
密閉ケース１７内に封入した潤滑油、３２は蓋側
及び底側の両ケース１８，１９間をシールするパ
ツキン、３３は密閉ケース１７を固定するねじで
ある。３４は蓋側ケース１８の上面部に枢軸２８
との間をシールすべく設けたシール部材、３５は
密閉ケース１７から上方に突出する枢軸２８にね
じ止めしたパルセータである。そして、３６は前
記内歯車２６に形成した複数の補強用のリブで、
これはボス部２６ａから端板部２６ｃにかけて放
射状に形成してあり、下端部が密閉ケース１７内
に封入された潤滑油３１中に浸されて内歯車２６
の回転に伴い潤滑油を撹拌する撹拌突部を兼用し
ている。 Now, 17 is a sealed case arranged in the recess 13, and this is made up of a lid side case 18 and a bottom side case 19. At approximately the center of both the lid side and bottom side cases 18 and 19, there is a receiving cylinder part 20, respectively. and a receiving recess 21 are formed, and a through hole 22 is formed in the bottom case 19 at a predetermined distance from the receiving recess 21, and a fitting cylinder portion 23 is directed downward so as to surround this through hole 22. It is installed protrudingly. The bottom case 19 of the sealed case 18 has a fitting cylinder portion 23 fitted to the upper end of the cylinder shaft 9 via a packing 24. Note that this gasket 24 is formed to integrally seal not only between the fitting cylinder part 23 and the cylinder shaft 9, but also between the washing shaft 12 and the cylinder shaft 9 (see Fig. 3). . Reference numeral 25 denotes a drive gear, which is screwed to the upper end of the washing shaft 12 that passes through the through hole 22 of the bottom case 19 and projects upward. 26 directly meshes with the drive gear 25 and together with the gear mechanism 27.
This internal gear is formed by integrally connecting the boss portion 26a and tooth portion 26b with an end plate portion 26c serving as a connecting portion, and the pivot 28 is connected to the boss portion 26.
It is integrally attached to a by insert molding. The internal gear 26 has an upper end and a lower end of the pivot 28 on both the cases 18 and 18, respectively, on the lid side and the bottom side.
It is rotatably supported by the receiving cylinder part 20 and the receiving recessed part 21 of No. 19 via bearings 29 and 30. Numeral 31 is lubricating oil sealed in the sealed case 17, 32 is a gasket that seals between the cases 18 and 19 on the lid side and the bottom side, and 33 is a screw that fixes the sealed case 17. 34 is a pivot 28 on the upper surface of the lid side case 18.
A sealing member 35 provided to seal between the airtight case 17 and the airtight case 17 is a pulsator screwed to the pivot shaft 28 projecting upward from the sealed case 17. 36 is a plurality of reinforcing ribs formed on the internal gear 26;
This is formed radially from the boss part 26a to the end plate part 26c, and the lower end part is immersed in the lubricating oil 31 sealed in the sealed case 17, so that the internal gear 26
It also serves as a stirring protrusion that stirs the lubricating oil as it rotates.

次に上記構成の作用を説明する。回転槽３内に
洗濯物を洗剤と共に投入してタイマをセツトする
と、図示しない給水弁が開いて回転槽３内に水が
供給され、所定水位に達すると図示しない水位ス
イツチが作動し、これに基づいて給水弁が閉じる
と共にモータが起動される。このモータの回転に
より洗い軸１２及び駆動歯車２５が回転して内歯
車２６と共にパルセータ３５を回転駆動して洗剤
洗いが行なわれる。そして、このようにして内歯
車２６が回転すると、この内歯車２６と共に回転
するリブ３６の下端部が密閉ケース１７内の潤滑
油３１を撹拌して外方に振り切るようになる。こ
れにより、潤滑油３１は密閉ケース１７内の周縁
部において盛り上るようになつて内歯車２６及び
駆動歯車２５の歯部が潤滑油３１中に没するよう
になり（第４図参照）、且つ駆動歯車２５には跳
ね掛けによつても給油されて、両歯車２５，２６
の歯面にまんべんなく油が付着して両歯車２５，
２６の噛合部分の潤滑を行なうようになる。そし
て、所定時間が経過して上述の洗剤洗い行程が終
了すると排水・脱水行程に移り、クラツチ機構が
切換つて脱水軸８が回転し、これにより回転槽３
が高速で回転駆動されて内部の水を排水間隙５を
介して、水受槽２内に排水し、且つ洗濯物を脱水
する。そして、この後再び回転槽３に水を貯留し
てパルセータ３５を駆動するすすぎ洗い行程及び
排水・脱水行程を順に繰返して全行程が終了す
る。 Next, the operation of the above configuration will be explained. When the laundry is put into the rotating tub 3 along with the detergent and the timer is set, a water supply valve (not shown) opens and water is supplied into the rotating tub 3. When a predetermined water level is reached, a water level switch (not shown) is activated. Based on this, the water supply valve is closed and the motor is started. The rotation of the motor rotates the washing shaft 12 and the driving gear 25, and together with the internal gear 26, the pulsator 35 is driven to rotate, thereby performing detergent washing. When the internal gear 26 rotates in this manner, the lower end of the rib 36 rotating together with the internal gear 26 agitates the lubricating oil 31 in the sealed case 17 and shakes it outward. As a result, the lubricating oil 31 rises at the peripheral edge inside the sealed case 17, and the teeth of the internal gear 26 and the driving gear 25 become submerged in the lubricating oil 31 (see FIG. 4). The drive gear 25 is also supplied with oil by splashing, and both gears 25 and 26
Oil is evenly attached to the tooth surfaces of both gears 25,
The meshing parts of 26 are now lubricated. When the above-mentioned detergent washing process is completed after a predetermined period of time has elapsed, the process moves on to the draining/dehydration process, and the clutch mechanism switches to rotate the dehydration shaft 8, which causes the rotating tank 3 to rotate.
is rotated at high speed to drain the water inside into the water receiving tank 2 through the drainage gap 5, and dewater the laundry. Thereafter, the rinsing process in which water is stored in the rotary tank 3 again and the pulsator 35 is driven, and the draining/dewatering process are repeated in order to complete the entire process.

このように本実施例では、歯車機構２７を密閉
ケース１７により液密に覆い、更にこの密閉ケー
ス１７内に潤滑油３１を封入してこれをリブ３６
により歯車２５，２６に付着させるようにしたか
ら、歯車機構２７に回転槽３内の洗い水が浸入し
てこの洗い水中に含まれる砂・泥等の異物により
歯車機構２７がロツクしたり異常摩耗を起したり
することを未然に防止でき、これと同時に歯車機
構２７の油潤滑を図り得ることから動力伝達の効
率化及び低騒音化をも図ることができる。しかも
本実施例では、密閉ケース１７内に封入した潤滑
油３１を内歯車２６と共に回転するリブ３６によ
り振り切るようにして外周側に集中させ、駆動歯
車２５及び内歯車２６の歯面に確実に付着させる
ことができるから、密閉ケース１７内に封入する
潤滑油は両歯車２５，２６を完全に浸さずリブ３
６の下端部のみを浸す程度の量であつても、両歯
車２５，２６の歯面全体にまんべんなく付着させ
て確実な潤滑を図ることができる。また、特に本
実施例の如くリブ３６を撹拌突部として利用する
ようにすれば、リブ３６により内歯車２６の補強
と潤滑油３１の供給とを同時に図り得て好都合で
ある。 In this embodiment, the gear mechanism 27 is liquid-tightly covered by the sealed case 17, and the lubricating oil 31 is sealed in the sealed case 17, and the lubricating oil 31 is applied to the ribs 36.
Since the washing water in the rotary tank 3 enters the gear mechanism 27, foreign substances such as sand and mud contained in the washing water may cause the gear mechanism 27 to lock or cause abnormal wear. It is possible to prevent this from occurring, and at the same time, it is possible to lubricate the gear mechanism 27 with oil, so that it is possible to improve the efficiency of power transmission and reduce noise. Moreover, in this embodiment, the lubricating oil 31 sealed in the sealed case 17 is shaken off by the ribs 36 that rotate together with the internal gear 26 and concentrated on the outer circumferential side, thereby ensuring that it adheres to the tooth surfaces of the driving gear 25 and the internal gear 26. Therefore, the lubricating oil sealed in the sealed case 17 does not completely immerse both gears 25 and 26, but instead penetrates the rib 3.
Even if the amount is enough to soak only the lower end of the gears 25 and 26, it can be applied evenly to the entire tooth surfaces of both gears 25 and 26, thereby ensuring reliable lubrication. Furthermore, especially if the ribs 36 are used as stirring protrusions as in this embodiment, it is advantageous that the ribs 36 can simultaneously reinforce the internal gear 26 and supply the lubricating oil 31.

第５図は本発明の異なる実施例を示すもので、
前記実施例との相違は密閉ケース１７の底側ケー
ス１９の略中央に油溜め用の凹部３７を形成し、
且つ内歯車２６のリブ３６の下端部を下方に延長
して前記凹部３７内に位置する撹拌突部３８を形
成したところにある。このように構成すれば、内
歯車２６が回転するとこれと共に回転する撹拌突
部３８により凹部３７内の潤滑油３１がかき出さ
れるようになつて飛び散るから、凹部３７内を満
たす程度の極めて少量の潤滑油３１によつて確実
な潤滑を図ることができ、しかも潤滑油３１を密
閉ケース１７内に注入する際凹部３７が目安とな
るから潤滑油３１を過不足なく注入することがで
きる。 FIG. 5 shows a different embodiment of the invention,
The difference from the above embodiment is that a recess 37 for an oil reservoir is formed approximately in the center of the bottom case 19 of the sealed case 17.
Further, the lower end of the rib 36 of the internal gear 26 is extended downward to form a stirring protrusion 38 located within the recess 37. With this configuration, when the internal gear 26 rotates, the lubricating oil 31 in the recess 37 is scraped out and scattered by the stirring protrusion 38 that rotates together with the internal gear 26. Reliable lubrication can be achieved with the lubricating oil 31, and since the recess 37 serves as a guide when injecting the lubricating oil 31 into the sealed case 17, the lubricating oil 31 can be injected in just the right amount.

尚、前記いずれの実施例でも、撹拌突部は内歯
車２６との一体成形により形成したが、これは別
体のものを内歯車２６或いは枢軸２８等の回転部
分に取付けるようにしてもよいことは勿論であ
る。 In each of the above embodiments, the stirring protrusion was formed by integral molding with the internal gear 26, but it is also possible to attach a separate part to the rotating part such as the internal gear 26 or the pivot 28. Of course.

本発明は以上述べたように、歯車機構に異物が
浸入して歯車機構のロツクや異常摩耗を来たすこ
とを未然に防止でき、これと同時に少量の潤滑油
により歯車機構の確実な潤滑を図り得て動力伝達
の高効率化及び低騒音化をも伴せて図り得る洗濯
機を提供できる。 As described above, the present invention can prevent foreign matter from entering the gear mechanism and cause locking or abnormal wear of the gear mechanism, and at the same time, can ensure reliable lubrication of the gear mechanism with a small amount of lubricating oil. Thus, it is possible to provide a washing machine that can achieve high power transmission efficiency and low noise.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図乃至第４図は本発明の一実施例を示し、
第１図は一部破断して示す全体の側面図、第２図
は要部の拡大縦断面図、第３図は密閉ケースの一
部を更に拡大して示す縦断面図、第４図は作用説
明用の縦断面図、第５図は本発明の他の実施例を
示す縦断面図である。 図中、３は回転槽（洗い槽）、１２は洗い軸、
１７は密閉ケース、２５は駆動歯車、２６は内歯
車、２６ａはボス部、２６ｂは歯部、２６ｃは端
板部（連結部）、２７は歯車機構、３１は潤滑油、
３５はパルセータ、３６はリブ（撹拌突部）、３
７は凹部、３８は撹拌突部である。 1 to 4 show an embodiment of the present invention,
Figure 1 is a partially cutaway side view of the whole, Figure 2 is an enlarged longitudinal sectional view of the main parts, Figure 3 is a longitudinal sectional view of a further enlarged part of the sealed case, and Figure 4 is a longitudinal sectional view of the sealed case. FIG. 5 is a longitudinal sectional view showing another embodiment of the present invention. In the figure, 3 is a rotating tank (washing tank), 12 is a washing shaft,
17 is a sealed case, 25 is a drive gear, 26 is an internal gear, 26a is a boss portion, 26b is a tooth portion, 26c is an end plate portion (connection portion), 27 is a gear mechanism, 31 is a lubricating oil,
35 is a pulsator, 36 is a rib (stirring projection), 3
7 is a recess, and 38 is a stirring protrusion.

Claims (1)

【特許請求の範囲】 １ 洗い及び脱水兼用の洗い槽の内底部に洗い軸
の回転をパルセータに伝達する歯車機構を配設し
たものにおいて、前記洗い槽に前記歯車機構を収
納する密閉ケースを設け、該密閉ケース内に潤滑
油を封入すると共に前記歯車機構の回転部分に前
記潤滑油中に浸された撹拌突部を設けたことを特
徴とする洗濯機。 ２ 撹拌突部は、歯車機構の歯車のボス部からこ
れと歯部とを連接する連結部にかけて形成した放
射状のリブにより構成されていることを特徴とす
る特許請求の範囲第１項に記載の洗濯機。 ３ 密閉ケースの下面には油溜め用の凹部が形成
され、該凹部内に撹拌突部が位置していることを
特徴とする特許請求の範囲第１項又は第２項に記
載の洗濯機。[Scope of Claims] 1. A gear mechanism for transmitting the rotation of a washing shaft to a pulsator is disposed at the inner bottom of a washing tank for both washing and dehydration, wherein the washing tank is provided with an airtight case for storing the gear mechanism. A washing machine, characterized in that a lubricating oil is sealed in the sealed case and a stirring protrusion immersed in the lubricating oil is provided on a rotating portion of the gear mechanism. 2. The stirring protrusion according to claim 1, characterized in that the stirring protrusion is constituted by a radial rib formed from the boss part of the gear of the gear mechanism to the connecting part connecting this and the tooth part. washing machine. 3. The washing machine according to claim 1 or 2, wherein a recess for an oil reservoir is formed in the lower surface of the sealed case, and a stirring protrusion is located within the recess.