EP0443662A2 - Système de fixation pour bras de pulvÀ©risation rotatif dans un lave-vaisselle - Google Patents

Système de fixation pour bras de pulvÀ©risation rotatif dans un lave-vaisselle Download PDF

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Publication number
EP0443662A2
EP0443662A2 EP91200285A EP91200285A EP0443662A2 EP 0443662 A2 EP0443662 A2 EP 0443662A2 EP 91200285 A EP91200285 A EP 91200285A EP 91200285 A EP91200285 A EP 91200285A EP 0443662 A2 EP0443662 A2 EP 0443662A2
Authority
EP
European Patent Office
Prior art keywords
sealing ring
support tube
rotor
cylinder part
spray arm
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.)
Granted
Application number
EP91200285A
Other languages
German (de)
English (en)
Other versions
EP0443662A3 (en
EP0443662B1 (fr
Inventor
Josef Buser
Harry Rapke
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bauknecht Hausgeraete GmbH
Whirlpool Europe BV
Original Assignee
Bauknecht Hausgeraete GmbH
Whirlpool Europe BV
Whirlpool International BV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bauknecht Hausgeraete GmbH, Whirlpool Europe BV, Whirlpool International BV filed Critical Bauknecht Hausgeraete GmbH
Publication of EP0443662A2 publication Critical patent/EP0443662A2/fr
Publication of EP0443662A3 publication Critical patent/EP0443662A3/de
Application granted granted Critical
Publication of EP0443662B1 publication Critical patent/EP0443662B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/14—Washing or rinsing machines for crockery or tableware with stationary crockery baskets and spraying devices within the cleaning chamber
    • A47L15/18—Washing or rinsing machines for crockery or tableware with stationary crockery baskets and spraying devices within the cleaning chamber with movably-mounted spraying devices
    • A47L15/22—Rotary spraying devices
    • A47L15/23—Rotary spraying devices moved by means of the sprays

Definitions

  • the invention relates to a spray arm mounting in a dishwasher with a stationary support tube for the supply of washing water, a rotor rotatably mounted on the support tube for distributing the washing water and with a sealing ring that seals a gap between the rotor and the support tube and that is rotationally fixed with a lateral surface abuts on a cylinder part of the rotor and with an end face on a sealing surface of the support tube lying parallel to the rotor plane.
  • Such a design is such.
  • B. become known from DE-PS 34 30 464.
  • the rotor is rotatably mounted on a bearing journal which is fixedly connected to the support tube.
  • the rotor plugged onto the trunnion is held by a nut screwed onto the free end of the trunnion, with play remaining between the nut and the top of the rotor, so that the rotor is rotatably supported on the trunnion and thus on the support tube.
  • the cylinder part of the rotor surrounds the free end of the support tube to form a gap.
  • a radially resilient slotted sealing ring lies with its outer lateral surface in a rotationally fixed manner on the inner lateral surface of the cylinder part and runs around in a sealing groove of the support tube.
  • one or the other end face of the sealing ring on the associated partial surface of the sealing groove apply and thus forms a seal. If there is wear in the sealing areas, the sealing ring is automatically readjusted.
  • the rotor is also rotatably mounted on a bearing journal connected to the support tube via a special bearing bush. With this type of construction too, the rotor is secured against loosening by a nut screwed onto the free end of the bearing journal.
  • the inner cylinder part of the rotor is surrounded by the support tube to form a gap, a sealing ring being provided in the gap, which sits with its inner circumferential surface on the outer circumferential surface of the cylinder part and with its one end face a sealing surface with a union nut of the support tube.
  • the invention has for its object to simplify and improve a spray arm mounting of the type mentioned in terms of its structure and assembly.
  • This object is achieved according to the invention in that the rotor, for. B. via a blind hole and a bearing pin, is placed on the support tube, that the sealing ring is fixed in the axial direction of the rotor fixed to the cylinder part and that the rotor is secured by an attack on the sealing ring counter bearing of the support tube against loosening.
  • the sealing ring takes over both the function of the seal and the function of the holder of the rotor
  • a particularly simple and secure fastening of the sealing ring against axial displacements results from the fact that it is mounted in a circumferential annular groove of the cylinder part. This enables a particularly simple assembly of the sealing ring by snapping into the ring groove if the sealing ring is designed to be radially flexible and either slotted or closed.
  • the rotationally fixed mounting of the sealing ring on the cylinder part generally prevents relative movement and thus wear between these two parts.
  • a driver engaging in a clearance of the sealing ring can be provided.
  • a relative and rotational movement between the rotor and the sealing ring is thus avoided in a simple and reliable manner, so that the cylinder part or the rotor remain wear-free. It is essential in the invention thus that in the normal case only axial sliding friction takes place between an end face of the sealing ring and part of the support tube, the support tube simultaneously forming the counter bearing with the holding function mentioned above.
  • the sealing ring can be provided with bores running in the axial direction.
  • a union nut which is screwed onto the free end of the support tube is preferably provided as a counter-bearing for the sealing ring fastened to the outer circumferential surface of the cylinder part, the end face of the sealing ring remote from the sealing surface being pressurized by the flushing water.
  • the thread of the union nut and the support tube is replaced by a bayonet lock, the direction of rotation of the rotor can be set as desired without fear of loosening the union nut. This also makes assembly easier.
  • a radially outwardly projecting, circumferential flange is provided at the end of the support tube as a counterbearing for the sealing ring fastened to the inner circumferential surface of the cylinder part Sealing ring forms.
  • Both types enable simple assembly and require fewer components than the known types according to the prior art and prevent the passage of peeling water in the axle bearing area of the rotor.
  • FIG. 1 and 2 shows a support tube 10 fixedly attached to a dishwasher with an outer ring 11 and a centrally arranged bearing part 12 which is connected to the outer ring 11 via flanges 13.
  • a bearing journal 14 is firmly injected into the bearing part 12, onto which a bearing bush 15 is placed.
  • 16 with a rotor is designated, which has a centrally arranged hub 16a and two spray arms 17.
  • the rotor 16 is through a blind hole drilled in the hub 16a 18 placed on the bearing pin 14 or the bearing bush 15.
  • a cylinder part 19 attached to the lower end of the rotor 16 is surrounded by the outer ring 11 of the support tube 10, forming a gap 20.
  • the cylinder part 19 has a circumferential annular groove 21, in which a radially resilient, slotted sealing ring 22 (piston ring) is embedded.
  • the sealing ring 22 sits with its inner lateral surface 22a firmly on the bottom of the groove 21 of the cylinder part 19.
  • a union nut 23 is screwed onto the outer end 11a of the outer ring 11 and forms a seal with an end face 23a with the end face 22b of the sealing ring.
  • the union nut 23 also forms the counterbearing for the sealing ring 22 when the rotor 16 is pressed against the end face 23a of the union nut over the end face 22b of the sealing ring 22 when the rinsing water flows in in the direction 24. This prevents the rotor 16 from being detached from the support tube 10.
  • a protruding driver 25 is provided in the groove 21, which engages in a recess 26 in the sealing ring 22.
  • the assembly is carried out in a simple manner such that the rotor 16 is first provided with the bearing bush 15. Then the union nut 23 is pushed over the cylinder part 19 and the sealing ring 22 is embedded in the groove 21. Then this assembled unit comprising the rotor 16, the union nut 23 and the sealing ring 22 is pushed onto the bearing pin 14 of the rotor 16 via the blind hole 19 and then by means of the union nut 23 the ring part 11a screwed on. With 11b ribs for guiding the rinse water are designated.
  • the cylinder part 27 includes the support tube 29 to form a gap 28, the annular groove 30 for receiving and fastening the sealing ring 31 now being arranged on the inside of the cylinder part 27.
  • the sealing ring 31 rotates in an annular sealing groove 32 in the support tube 29.
  • the sealing groove 32 is delimited at the upper end by a radially outwardly projecting ring flange 33.
  • This ring flange 33 forms a seal on the one hand with the end face of the sealing ring 31 facing it and, on the other hand, the counter bearing for the sealing ring 31 when the latter, together with the rotor 16, is pressed upward with the flushing water flowing in.
  • the sealing ring 31 also assumes both a sealing and a holding function. Especially when the rinsing water flows in, the rotor 16 is pressed upward, whereby a loosening from the support tube 29 by the holding and sealing ring 31 is prevented. In the further course of operation, the pressure in the rotor 16 drops because water emerges from the spray openings 16 '. Since water penetrating through the gap 28 acts simultaneously on the sealing ring 31, the rotor 16 is now pressed down. In this case, there is a seal between the lower end face of the sealing ring 31 and the facing surface of the sealing groove 32.
  • FIG. 4a shows the cylindrical end 19 according to FIG. 1 with the annular groove 21 into which the sealing ring 34 according to FIG. 4b is to be introduced.
  • the inner diameter of the sealing ring 34 is somewhat smaller than the diameter of the annular groove 21 on the groove base.
  • the sealing ring 34 is pushed onto the cylinder part 19 until it snaps into the annular groove 21. This is possible because both parts are made of flexible plastic. After the process, the sealing ring 34 is firmly attached to the rotor with a press fit.
  • the end of the cylinder part 19 is chamfered for insertion.
  • FIGS. 5a again shows the cylinder part 19, the beveled parts of which are designed here as locking elements 36 resilient in the direction of the arrow 35.
  • the sealing ring 37 shown in FIGS. 5b and c When the sealing ring 37 shown in FIGS. 5b and c is applied, the latching elements 36 yield to the inside and then snap back, so that the sealing ring 37 is clamped in place. Slipping is prevented by circumferential teeth 38 on the inner circumferential surface of the sealing ring 37. With 39 through holes in the sealing ring 37 are designated.

Landscapes

  • Washing And Drying Of Tableware (AREA)
EP91200285A 1990-02-13 1991-02-11 Système de fixation pour bras de pulvérisation rotatif dans un lave-vaisselle Expired - Lifetime EP0443662B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4004319 1990-02-13
DE4004319A DE4004319A1 (de) 1990-02-13 1990-02-13 Sprueharmlagerung bei einer geschirrspuelmaschine

Publications (3)

Publication Number Publication Date
EP0443662A2 true EP0443662A2 (fr) 1991-08-28
EP0443662A3 EP0443662A3 (en) 1991-10-09
EP0443662B1 EP0443662B1 (fr) 1995-01-04

Family

ID=6399998

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91200285A Expired - Lifetime EP0443662B1 (fr) 1990-02-13 1991-02-11 Système de fixation pour bras de pulvérisation rotatif dans un lave-vaisselle

Country Status (2)

Country Link
EP (1) EP0443662B1 (fr)
DE (2) DE4004319A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1634527A3 (fr) * 2004-09-14 2010-02-17 Premark FEG L.L.C. Ensemble de montage d'un bras d'arrosage pour lave-vaisselle
EP2721989A1 (fr) * 2012-10-18 2014-04-23 Panasonic Corporation Lave-vaisselle
CN106821249A (zh) * 2017-03-13 2017-06-13 浙江森歌电器有限公司 一种洗碗机的喷淋器
CN108926308A (zh) * 2017-05-25 2018-12-04 青岛海尔洗碗机有限公司 一种洗碗机喷淋臂连接结构及洗碗机
US10582827B2 (en) 2016-06-08 2020-03-10 Samsung Electronics Co., Ltd. Dishwasher
US10939797B2 (en) 2016-06-08 2021-03-09 Samsung Electronics Co., Ltd. Dishwasher

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5673716A (en) * 1994-10-25 1997-10-07 Whirlpool Europe B.V. Device for sealing the transitional region between a dishwashing machine spraying arm and its bearing member
DE102013013859A1 (de) 2013-08-20 2015-02-26 Audi Ag Dichtungsanordnung, Flachdichtung für eine Dichtungsanordnung sowie Verfahren zur Montage einer Dichtungsanordnung
US11219349B2 (en) 2016-07-08 2022-01-11 Electrolux Appliances Aktiebolag Wash arm assembly and dishwasher comprising wash arm assembly
WO2019086106A1 (fr) 2017-10-31 2019-05-09 Electrolux Appliances Aktiebolag Ensemble bras gicleur
US11612299B2 (en) 2017-10-31 2023-03-28 Electrolux Appliances Aktiebolag Wash arm assembly

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3672573A (en) * 1971-03-03 1972-06-27 Fedders Corp Dishwasher spray arm with integral bearing
IT997436B (it) * 1973-07-10 1975-12-30 Zanussi A Spa Industrie Perfezionamenti nelle macchine lavastoviglie
US3918644A (en) * 1974-11-05 1975-11-11 Whirlpool Co Invertible dual action spray arm for dishwasher
DE3430464A1 (de) * 1984-08-18 1986-02-27 Bauknecht Hausgeräte GmbH, 7000 Stuttgart Dichtungsvorrichtung fuer das foerder- und verteilsystem des spuelwassers von haushaltsgeraeten

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1634527A3 (fr) * 2004-09-14 2010-02-17 Premark FEG L.L.C. Ensemble de montage d'un bras d'arrosage pour lave-vaisselle
EP2721989A1 (fr) * 2012-10-18 2014-04-23 Panasonic Corporation Lave-vaisselle
US10582827B2 (en) 2016-06-08 2020-03-10 Samsung Electronics Co., Ltd. Dishwasher
US10939797B2 (en) 2016-06-08 2021-03-09 Samsung Electronics Co., Ltd. Dishwasher
CN106821249A (zh) * 2017-03-13 2017-06-13 浙江森歌电器有限公司 一种洗碗机的喷淋器
CN106821249B (zh) * 2017-03-13 2023-09-05 浙江森歌智能厨电股份有限公司 一种洗碗机的喷淋器
CN108926308A (zh) * 2017-05-25 2018-12-04 青岛海尔洗碗机有限公司 一种洗碗机喷淋臂连接结构及洗碗机
CN108926308B (zh) * 2017-05-25 2022-12-30 青岛海尔洗碗机有限公司 一种洗碗机喷淋臂连接结构及洗碗机

Also Published As

Publication number Publication date
DE59104105D1 (de) 1995-02-16
DE4004319A1 (de) 1991-08-14
EP0443662A3 (en) 1991-10-09
EP0443662B1 (fr) 1995-01-04

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