EP1091037B1 - Machine fo treating laundry having a cantilever-supported drum - Google Patents
Machine fo treating laundry having a cantilever-supported drum Download PDFInfo
- Publication number
- EP1091037B1 EP1091037B1 EP00120913A EP00120913A EP1091037B1 EP 1091037 B1 EP1091037 B1 EP 1091037B1 EP 00120913 A EP00120913 A EP 00120913A EP 00120913 A EP00120913 A EP 00120913A EP 1091037 B1 EP1091037 B1 EP 1091037B1
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- EP
- European Patent Office
- Prior art keywords
- bearing
- rings
- shaft journal
- laundry treating
- treating machine
- 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.)
- Expired - Lifetime
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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
-
- 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
- D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
- D06F34/14—Arrangements for detecting or measuring specific parameters
Definitions
- the invention relates to a laundry treatment machine with an overhung Drum that is rotatable about a horizontal or inclined axis, being in a bearing housing two radial ball bearings with their outer rings free of seats and with an axial distance are arranged to each other and with their inner rings connected to the drum Pick up the shaft journal.
- Such bearing arrangements are in laundry treatment machines, especially at Washing machines and washer dryers are generally known (e.g. Miele washing machines with the serial designation W 840).
- the aforementioned washing machine is rotatably mounted in a tub Drum, which is connected to the shaft journal, formed.
- the tub holds on its back wall a bearing cross with a bearing housing for the arrangement of the storage.
- In the center of the tub's rear wall is a passage for the shaft journal.
- the Shaft journal carries a pulley for the drum drive belt at its rear end.
- the rotor of a so-called direct drive can be found there (see DE 198 06 258 A2) be attached. Two spaced apart take place in the bearing housing Radial ball bearing rotatably mounted on the shaft journal
- a disc spring in front of the inner ring of the drum-side bearing is designed to play restrict the floating bearing and reduce the noise. Due to the The use of disc springs or the like is the assembly of the radial ball bearings by the number of required components expensive. This measure is also not suitable for the Remove internal clearance at the fixed bearing on the drive side. That's why it still happens disadvantages described above.
- the invention thus presents the problem caused by the design of the bearing arrangement in the disadvantages of the fixed / floating bearing arrangement to be eliminated and the component expenditure to simplify assembly.
- the advantages which can be achieved with the invention consist of a lower number of components and in particular by installing a braced bearing arrangement in that an acoustically smooth running of the drum is achieved even when spinning.
- the braced bearing arrangement has an advantageous effect on the life of the bearings out.
- bearing arrangement as a completely pre-assembled storage module in a specially designed bearing housing z. B. in laundry treatment machines a plastic tub can be used.
- the storage module can be advantageous are encapsulated as a complete assembly.
- the inner rings of both radial ball bearings are fixed on the shaft journal in a tight fit and under tension using a concentric to the Shaft journal arranged spacer sleeve under the action of an outer axially acting Contact force.
- the easiest way to fix this is between the bottom of the drum and a screw for attaching a pulley or a direct drive rotor to achieve built tension chain, the tension chain from a race a shaft seal, the inner rings themselves, the sleeve and the pulley or Direct drive rotor exists.
- tolerance zones of the inner rings and the tolerance zones of the Shaft journals are selected such that inner rings and shaft journals have a clearance fit form, arises with such a structure after the completion of the bearing arrangement Shaft journal and pulley or rotor the operating position of the bearing arrangements independently.
- the tolerance zones of the outer rings and the tolerance zones of the Bearing housing bores are selected such that outer rings and bores are an interference fit form. The circumferential forces in the centrifugal mode can then not be used for hiking Lead outer rings.
- FIG. 1 shows the bearing arrangement for the shaft journal (1) of a laundry treatment machine with a tub (2) and a drum (3) rotatably mounted therein Shot of the laundry in the side view shown in section.
- the bearing arrangement for the drum (3) is arranged in the center of the tub wall.
- the bearing cross is on the tub (2) (6) with the bearing housing (7) for receiving the bearing arrangement for the drum (3) attached.
- the bearing arrangement for the drum (3) consists of a front, drum-side radial ball bearing (9) and a rear, drive-side radial ball bearing (10), which accommodate the shaft journal (1) so that it can rotate and overhung.
- the bearing housing (7) is cylindrical with a through hole (20) for the shaft journal (1) trained.
- the end faces of the bearing housing (7) each have a bearing housing bore (11a, 11b) with a larger diameter than the through hole (20), which forms the bearing seat.
- the outer ring (9b) of the drum-side bearing (9) comes on the by the difference in diameter of the annular stop surface (12a) Investment. Between the outer ring (10b) of the drive-side bearing (10) and the stop surface (12b) there is a gap X, the function of which will be explained later.
- the outer rings (9b, 10b) are fixed in the bearing housing bores (11a, 11b) by a press fit.
- the bearing inner rings (9a, 10a) are fixed free of any leakage in relation to the shaft journal and axially braced by applying an external, axially acting contact force. Thus, despite a match fit, they form a tight connection. This is done using the tension chain described below: A specially designed shaft seal (14) is pressed on the drum side onto an annular collar (15) on the bearing housing (7). Due to its continuous race (14a), it is suitable for the axial transmission of force from the drum base (3a) to the drum-side inner ring (9a). The shaft journal (1) with the drum (3) is inserted from the drum-side assembly direction. The pulley (8) is placed on the opposite side.
- the screw (16) of the pulley (8) is tightened, as a result of which the bearing inner rings are braced with the interposition of a sleeve (13) and fixed in the axial direction.
- the bearing arrangement is tensioned via the pulley (8).
- the bearing is braced via the rotor of the direct drive.
- the length of the tensioning chain is oversized compared to the length of the shaft journal (1).
- a clearance Y creates a gap Y between the hub (8a) of the pulley and a contact surface (1a) on the shaft journal (1).
- FIG. 2 shows the bearing arrangement in a bearing housing (7) as a completely pre-assembled Storage module.
- This storage module can e.g. B. when used in a laundry treatment machine overmolded completely pre-assembled with plastic tub. Besides, can the storage module also in single drum washing machines and washing machines with direct drives or z. B. can also be used in tumble dryers.
- the module shown can include only the bearing arrangement or be expanded by the shaft seal (14).
- the bearings are installed (9, 10) in a pre-assembly step by prestressing the inner rings (9a, 10a) an auxiliary device.
- the assembly of the bearing arrangement or the bearing module follows described with reference to FIGS. 3a to 3d for a bearing arrangement according to FIG. 1:
- the drum-side bearing (9) with its outer ring (9b) is annular Stop surface (12a) pressed into the bearing housing bore (11a) ( Figure 3a).
- the Press-in device (17) the inner ring (9a) with a defined force against the Outer ring (9b) biased towards the center of the bearing housing (7) and in this position held.
- the sleeve (13) is, for example a holding mandrel, not shown, into the bearing housing and to the inner ring (9a) created ( Figure 3b).
- the sleeve (13) can also by the drum-side assembly direction before or when installing the bearing (9).
- the drive-side bearing (10) is only so far into the bearing seat (11) via the outer ring pressed in until the bearing seat width of the bearing (10) is fully supported ( Figure 3c). This is done at the same time the preload of the inner ring (10a) with respect to the outer ring (10b).
- the inner ring (10a) is pressed against the outer ring (10b) by means of the press-in device (18) moved to the center of the bearing housing and also preloaded.
- the press-in device (18) moved to the center of the bearing housing and also preloaded.
- the tension measure as a ratio of the distances of the Outer rings to the distance between the inner rings defined solely by the size of the gap width X.
- the Length of the spacer sleeve (13) and the depth of the bearing housing bores (11a, 11b) must be be be dimensioned such that the gap when the inner ring (10a) lies against the sleeve Minimum dimension, otherwise the desired preload cannot be achieved.
- the Inner bearing rings of the bearings (9, 10) form one with the sleeve (13) in the auxiliary device (17, 18) pre-tensioned assembly chain.
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
- Mounting Of Bearings Or Others (AREA)
- Treatment Of Fiber Materials (AREA)
- Centrifugal Separators (AREA)
- Rolling Contact Bearings (AREA)
Abstract
Description
Die Erfindung betrifft eine Wäschebehandlungsmaschine mit einer fliegend gelagerten Trommel, die um eine horizontale oder geneigte Achse drehbar ist, wobei in einem Lagergehäuse zwei Radialkugellager mit ihren Außenringen lossitzfrei und mit axialem Abstand zueinander angeordnet sind und mit ihren Innenringen einen mit der Trommel verbundenen Wellenzapfen aufnehmen.The invention relates to a laundry treatment machine with an overhung Drum that is rotatable about a horizontal or inclined axis, being in a bearing housing two radial ball bearings with their outer rings free of seats and with an axial distance are arranged to each other and with their inner rings connected to the drum Pick up the shaft journal.
Derartige Lageranordnungen sind bei Wäschebehandlungsmaschinen, insbesondere bei Waschmaschinen und bei Waschtrocknern allgemein bekannt (z. B. Miele Waschmaschinen mit der Serienbezeichnung W 840).Such bearing arrangements are in laundry treatment machines, especially at Washing machines and washer dryers are generally known (e.g. Miele washing machines with the serial designation W 840).
Die vorgenannte Waschmaschine ist mit einer in einem Laugenbehälter drehbar gelagerten Trommel, welche mit dem Wellenzapfen verbunden ist, ausgebildet. Der Laugenbehälter trägt auf seiner Rückwand ein Lagerkreuz mit einem Lagergehäuse für die Anordnung der Lagerung. Im Zentrum der Laugenbehälterrückwand ist eine Durchtrittsöffnung für den Wellenzapfen. Der Wellenzapfen trägt an seinem rückseitigen Ende eine Riemenscheibe für den Trommelantriebsriemen. Alternativ kann dort der Rotor eines sogenannten Direktantriebs ( s. DE 198 06 258 A2) befestigt sein. In dem Lagergehäuse nehmen zwei auf Abstand zueinander angeordnete Radialkugellager den Wellenzapfen drehbar gelagert aufThe aforementioned washing machine is rotatably mounted in a tub Drum, which is connected to the shaft journal, formed. The tub holds on its back wall a bearing cross with a bearing housing for the arrangement of the storage. In the center of the tub's rear wall is a passage for the shaft journal. The Shaft journal carries a pulley for the drum drive belt at its rear end. Alternatively, the rotor of a so-called direct drive can be found there (see DE 198 06 258 A2) be attached. Two spaced apart take place in the bearing housing Radial ball bearing rotatably mounted on the shaft journal
Bei fliegend gelagerten Trommeln tritt beim Schleudern eine Umfangslast an den Außenringen der Lager (insbesondere des trommelseitigen Lagers) und eine Punktlast am Innenring der Lager auf. Grund dafür ist die Unwucht, die durch eine ungleichmäßige Wäscheverteilung entstehen kann und die bei Schleuderdrehzahlen (die Zentrifugalkraft ist größer als die Erdanziehung) eine ortsfeste Position im Bezug zur Trommel und zum Wellenzapfen einnimmt. Beim Waschen ist aufgrund der geringen Trommeldrehzahl die Erdanziehung größer als die Zentrifugalkraft. Die Wäsche fällt deshalb nach unten und es entsteht eine Umfangslast an den Innenringen und eine Punktlast an den Außenringen. Da die beim Schleudern auftretenden Kräfte auf die Lager wesentlich größer als die beim Waschen sind, wird bei bekannten Waschmaschinen eine klassische Lageranordnung gewählt, bei der das antriebsseitige Lager die Funktion des Festlagers und das trommelseitige Lager die Funktion des Loslagers übernimmt. Die Außenringe beider Lager sind im Presssitz montiert, die Innenringe im Übergangssitz. Aufgrund von Maßkombinationen innerhalb des Toleranzbereiches bei Übergangssitz kann die Verbindung Wellenzapfen/Lagerinnenring im Bereich des größtmöglichen Spiels liegen, wodurch die Lagerluft an beiden Lagern sehr groß ist. Dies verursacht eine ungleichmäßige Kraftübertragung vom Innenring auf den Außenring über die Kugel, wodurch ein erhöhter Verschleiß entsteht. Außerdem resultiert daraus eine erhöhte Geräuschentwicklung.In the case of overhung drums, a circumferential load occurs on the outer rings when spinning the bearing (especially the drum-side bearing) and a point load on the inner ring of the Stock on. The reason for this is the imbalance caused by an uneven distribution of laundry can arise and that at spin speeds (the centrifugal force is greater than gravity) occupies a fixed position in relation to the drum and the shaft journal. When washing, the earth's gravity is greater than that due to the low drum speed Centrifugal force. The laundry therefore falls down and there is a peripheral load on the Inner rings and a point load on the outer rings. Because those that occur when spinning Forces on the bearings are significantly greater than those during washing, in known washing machines a classic bearing arrangement chosen, in which the drive-side bearing Function of the fixed bearing and the drum-side bearing takes over the function of the floating bearing. The outer rings of both bearings are press-fitted, the inner rings in the transition seat. Due to dimensional combinations within the tolerance range for transition seats, the Connection shaft journal / bearing inner ring are in the area of the greatest possible play, whereby the internal clearance in both bearings is very large. This causes an uneven Power transmission from the inner ring to the outer ring via the ball, resulting in an increased Wear occurs. This also results in increased noise.
Bei der W 840 soll eine Tellerfeder vor dem Innenring des trommelseitigen Lagers das Spiel des Loslagers einschränken und die Geräuschentwicklung vermindern. Bedingt durch den Einsatz von Tellerfedern oder dgl. ist die Montage der Radialkugellager durch die Zahl der erforderlichen Bauteile aufwendig. Diese Maßnahme ist außerdem nicht dazu geeignet, die Lagerluft am antriebsseitigen Festlager zu beseitigen. Deshalb kommt es nach wie vor zu den vorbeschriebenen Nachteilen.In the W 840, a disc spring in front of the inner ring of the drum-side bearing is designed to play restrict the floating bearing and reduce the noise. Due to the The use of disc springs or the like is the assembly of the radial ball bearings by the number of required components expensive. This measure is also not suitable for the Remove internal clearance at the fixed bearing on the drive side. That's why it still happens disadvantages described above.
Der Erfindung stellt sich somit das Problem, die durch die Auslegung der Lageranordnung in der Fest- Loslageranordnung auftretenden Nachteile zu beseitigen und den Bauteileaufwand zwecks Vereinfachung der Montage zu reduzieren.The invention thus presents the problem caused by the design of the bearing arrangement in the disadvantages of the fixed / floating bearing arrangement to be eliminated and the component expenditure to simplify assembly.
Erfindungsgemäß wird dieses Problem bei einer Wäschebehandlungsmaschine der eingangs genannten Art dadurch gelöst, dass die Innenringe beider Radialkugellager im eingebauten Zustand lossitzfrei in Bezug auf den Wellenzapfen und axial definiert verspannt in Bezug auf die Außenringe angeordnet sind. Vorteilhafte Ausgestaltungen und Weiterbildungen der Erfindung ergeben sich aus den nachfolgenden Unteransprüchen.According to the invention, this problem is solved at the beginning in a laundry treatment machine mentioned type solved in that the inner rings of both radial ball bearings in the built Condition without loss in relation to the shaft journal and clamped axially defined in relation to the outer rings are arranged. Advantageous refinements and developments of Invention emerge from the following subclaims.
Die mit der Erfindung erreichbaren Vorteile bestehen neben der vereinfachten Montage durch eine geringere Bauteilezahl und durch Einbau einer verspannten Lageranordnung insbesondere darin, dass ein akustisch ruhiger Lauf der Trommel auch im Schleuderbetrieb erreicht wird. Außerdem wirkt sich die verspannte Lageranordnung vorteilhaft auf die Lebensdauer der Lager aus. Mit dem Festsitz der Lageraußenringe wird die unwuchtbedingte Belastung des Lagers (Umfangslast des Außenringes) aufgenommen. Mit dem in axialer Richtung fixierten Sitz der Lagerinnenringe werden die durch den Wäschefall auftretenden Kräfte (Umfangslast des Innenringes) im Waschbetrieb aufgenommen. Der besondere Vorteil der axialspielfreien Anordnung der Lager liegt darin, dass im Normalbetrieb keine Relativbewegung zwischen Wellenzapfen und Lagerung möglich ist, wodurch die Lageranordnung insgesamt verschleißarm ausgebildet ist.In addition to the simplified assembly, the advantages which can be achieved with the invention consist of a lower number of components and in particular by installing a braced bearing arrangement in that an acoustically smooth running of the drum is achieved even when spinning. In addition, the braced bearing arrangement has an advantageous effect on the life of the bearings out. With the tight fit of the bearing outer rings, the unbalanced load on the Bearing (peripheral load of the outer ring) added. With the one fixed in the axial direction The seat inner rings are the forces caused by the laundry (peripheral load of the inner ring) in washing mode. The particular advantage of the axial play The arrangement of the bearings is that in normal operation there is no relative movement between Shaft journal and storage is possible, making the bearing arrangement overall wear-resistant is trained.
Ein weiterer Vorteil liegt darin, dass die Lageranordnung als komplett vormontiertes Lagermodul in einem dazu ausgebildeten Lagergehäuse z. B. in Wäschebehandlungsmaschinen mit einem Kunststofflaugenbehälter zum Einsatz kommen kann. Das Lagermodul kann vorteilhaft als Komplettbaugruppe umspritzt werden.Another advantage is that the bearing arrangement as a completely pre-assembled storage module in a specially designed bearing housing z. B. in laundry treatment machines a plastic tub can be used. The storage module can be advantageous are encapsulated as a complete assembly.
In einer vorteilhaften Ausführungsform erfolgt eine Fixierung der Innenringe beider Radialkugellager auf dem Wellenzapfen im Festsitz und unter Vorspannung mittels einer konzentrisch zum Wellenzapfen angeordneten Abstandshülse unter Einwirkung einer äußeren axial wirkenden Anpresskraft. Am leichtesten ist diese Fixierung durch eine zwischen dem Boden der Trommel und einer Schraube zur Befestigung einer Riemenscheibe oder eines Direktantrieb-Rotors aufgebaute Verspannungskette zu erreichen, wobei die Verspannungskette aus einem Laufring einer Wellendichtung, den Innenringen selbst, der Hülse und der Riemenscheibe oder dem Direktantrieb-Rotor besteht. Wenn die Toleranzfelder der Innenringe und die Toleranzfelder des Wellenzapfens derart gewählt sind, dass Innenringe und Wellenzapfen eine Spielpassung bilden, stellt sich bei einem solchen Aufbau nach der Komplettierung der Lageranordnung mit Wellenzapfen und Riemenscheibe bzw. Rotor die Betriebsposition der Lageranordnungen selbständig ein.In an advantageous embodiment, the inner rings of both radial ball bearings are fixed on the shaft journal in a tight fit and under tension using a concentric to the Shaft journal arranged spacer sleeve under the action of an outer axially acting Contact force. The easiest way to fix this is between the bottom of the drum and a screw for attaching a pulley or a direct drive rotor to achieve built tension chain, the tension chain from a race a shaft seal, the inner rings themselves, the sleeve and the pulley or Direct drive rotor exists. If the tolerance zones of the inner rings and the tolerance zones of the Shaft journals are selected such that inner rings and shaft journals have a clearance fit form, arises with such a structure after the completion of the bearing arrangement Shaft journal and pulley or rotor the operating position of the bearing arrangements independently.
Es ist außerdem vorteilhaft, wenn die Vorspannung der Innenringe beider Radialkugellager in Richtung des Lagergehäuse-Zentrums erfolgt. Hierdurch ergibt sich eine O-Anordnung der Lager, wodurch das Kippspiel und damit der Verschleiß verringert wird.)It is also advantageous if the preload of the inner rings of both radial ball bearings in Direction of the center of the bearing housing. This results in an O arrangement of the Bearings, which reduces the tilt play and thus the wear.)
Daneben ist es vorteilhaft, wenn die Toleranzfelder der Außenringe und die Toleranzfelder der Lagergehäuse-Bohrungen derart gewählt sind, dass Außenringe und Bohrungen eine Presspassung bilden. Die Umfangskräfte im Schleuderbetrieb können dann nicht zum Wandern der Außenringe führen.In addition, it is advantageous if the tolerance zones of the outer rings and the tolerance zones of the Bearing housing bores are selected such that outer rings and bores are an interference fit form. The circumferential forces in the centrifugal mode can then not be used for hiking Lead outer rings.
Eine Bemessung der Abstandshülse und der Tiefe der Lagergehäusebohrungen in der Art, dass sich zwischen der Anschlagfläche mindestens einer Bohrung und dem in dieser Bohrung angeordneten Außenring ein Spalt einstellt, gewährleistet, das Toleranzen in der Verspannungskette ausgeglichen werden. Es ist vorteilhaft, wenn der Spalt im Bereich des antriebsseitigen Radialkugellagers angeordnet ist, da dieses Lager die geringeren Kräfte aufnehmen muss. Außerdem sollte die Verspannungskette gegenüber der Länge des Wellenzapfens ein Übermaß aufweisen.A dimensioning of the spacer sleeve and the depth of the bearing housing bores in the way that there is at least one hole between the stop surface and the hole in this hole arranged outer ring sets a gap, ensures tolerances in the tension chain be balanced. It is advantageous if the gap in the area of radial ball bearing on the drive side is arranged, since this bearing has the lower forces must record. In addition, the tension chain should be compared to the length of the Shaft journal have an oversize.
Ein Ausführungsbeispiel der Erfindung ist in den Zeichnungen rein schematisch dargestellt und wird nachfolgend näher beschrieben. Es zeigt:
Figur 1- Die Lageranordnung einer erfindungsgemäß aufgebauten Waschmaschine in der Seitenansicht im Schnitt,
Figur 2- die Lageranordnung in einem Lagergehäuse als Lagermodul,
- Figur 3
- die Montagefolge zur Justierung der Lageranordnung (Fig. 3a bis 3d).
- Figure 1
- The side view of the bearing arrangement of a washing machine constructed according to the invention in section,
- Figure 2
- the bearing arrangement in a bearing housing as a bearing module,
- Figure 3
- the assembly sequence for adjusting the bearing arrangement (Fig. 3a to 3d).
In der Figur 1 ist die Lageranordnung für den Wellenzapfen (1) einer Wäschebehandlungsmaschine mit einem Laugenbehälter (2) und einer darin drehbar gelagerten Trommel (3) zur Aufnahme der Wäsche in der Seitenansicht im Schnitt dargestellt. Im Zentrum der Laugenbehälterrückwand ist die Lageranordnung für die Trommel (3) angeordnet. Der mit der Trommelrückwand (3a) über eine Nabe (4) verbundene Wellenzapfen (1) ist durch eine Öffnung (5) in der Laugenbehälterrückwand hindurchgeführt. An dem Laugenbehälter (2) ist das Lagerkreuz (6) mit dem Lagergehäuse (7) zur Aufnahme der Lageranordnung für die Trommel (3) befestigt. Um die Trommel (3) durch einen nicht dargestellten Motor antreiben zu können, trägt der Wellenzapfen (1) auf seinem hinteren Ende eine Riemenscheibe (8) für den Trommelantriebsriemen (nicht dargestellt). Die Lageranordnung für die Trommel (3) besteht aus einem vorderen, trommelseitigen Radialkugellager (9) und einem hinteren, antriebsseitigen Radialkugellager(10), die den Wellenzapfen (1) drehbar und fliegend gelagert aufnehmen.FIG. 1 shows the bearing arrangement for the shaft journal (1) of a laundry treatment machine with a tub (2) and a drum (3) rotatably mounted therein Shot of the laundry in the side view shown in section. In the center of the tub wall the bearing arrangement for the drum (3) is arranged. The one with the rear wall of the drum (3a) via a hub (4) connected shaft journal (1) through an opening (5) passed through in the tub wall. The bearing cross is on the tub (2) (6) with the bearing housing (7) for receiving the bearing arrangement for the drum (3) attached. To drive the drum (3) by a motor, not shown, carries the shaft journal (1) has a pulley (8) for the drum drive belt on its rear end (not shown). The bearing arrangement for the drum (3) consists of a front, drum-side radial ball bearing (9) and a rear, drive-side radial ball bearing (10), which accommodate the shaft journal (1) so that it can rotate and overhung.
Das Lagergehäuse (7) ist zylindrisch mit einer Durchgangsbohrung (20) für den Wellenzapfen (1) ausgebildet. Die Stirnseiten des Lagergehäuses (7) weisen jeweils eine Lagergehäuse-Bohrung (11a, 11b) mit größerem Durchmesser als die Durchgangsbohrung (20) auf, welche den Lagersitz bildet. Der Außenring (9b) des trommelseitigen Lagers (9) kommt an der durch den Durchmesserunterschied entstehenden kreisringförmigen Anschlagfläche (12a) zur Anlage. Zwischen dem Außenring (10b) des antriebsseitigen Lagers (10) und der Anschlagfläche (12b) ist ein Spalt X angeordnet, dessen Funktion später erklärt ist. Die Außenringe (9b, 10b) sind durch Presssitz in den Lagergehäuse-Bohrungen (11a, 11b) fixiert.The bearing housing (7) is cylindrical with a through hole (20) for the shaft journal (1) trained. The end faces of the bearing housing (7) each have a bearing housing bore (11a, 11b) with a larger diameter than the through hole (20), which forms the bearing seat. The outer ring (9b) of the drum-side bearing (9) comes on the by the difference in diameter of the annular stop surface (12a) Investment. Between the outer ring (10b) of the drive-side bearing (10) and the stop surface (12b) there is a gap X, the function of which will be explained later. The outer rings (9b, 10b) are fixed in the bearing housing bores (11a, 11b) by a press fit.
Die Lagerinnenringe (9a, 10a) werden lossitzfrei in Bezug auf den Wellenzapfen und axial
verspannt durch Aufbringen einer äußeren axial wirkenden Anpresskraft auf Abstand fixiert.
Somit bilden sie trotz Spielpassung einen festsitzenden Verbund. Dies erfolgt durch die
nachfolgend beschriebene Verspannungskette:
Eine speziell ausgebildete Wellendichtung (14) wird trommelseitig auf einen ringförmigen
Bund (15) am Lagergehäuse (7) aufgepresst. Diese ist aufgrund ihres durchgehenden Laufrings
(14a) zur axialen Kraftübertragung vom Trommelboden (3a) auf den trommelseitigen
Innenring (9a) geeignet. Der Wellenzapfen (1) mit der Trommel (3) wird aus der trommelseitigen
Montagerichtung eingesetzt. Die Riemenscheibe (8) wird auf der entgegengesetzten
Seite aufgelegt. Die Schraube (16) der Riemenscheibe (8) wird angezogen, wodurch die
Lagerinnenringe unter Zwischenlage einer Hülse (13) verspannt und in axialer Richtung fixiert
werden. Bei dieser Ausführung wird die Lageranordnung über die Riemenscheibe (8) verspannt.
Bei Waschmaschinen mit Direktantrieben (nicht dargestellt) erfolgt ein Verspannen der
Lagerung über den Rotor des Direktantriebs. Zur Sicherstellung des Verspannwegs weist die
Länge der Verspannungskette ein Übermaß gegenüber der Länge des Wellenzapfens (1) auf.
Außerdem wird durch einen Freistich ein Spalt Y zwischen der Nabe (8a) der Riemenscheibe
und einer Anlagefläche (1a) am Wellenzapfen (1) erzeugt.The bearing inner rings (9a, 10a) are fixed free of any leakage in relation to the shaft journal and axially braced by applying an external, axially acting contact force. Thus, despite a match fit, they form a tight connection. This is done using the tension chain described below:
A specially designed shaft seal (14) is pressed on the drum side onto an annular collar (15) on the bearing housing (7). Due to its continuous race (14a), it is suitable for the axial transmission of force from the drum base (3a) to the drum-side inner ring (9a). The shaft journal (1) with the drum (3) is inserted from the drum-side assembly direction. The pulley (8) is placed on the opposite side. The screw (16) of the pulley (8) is tightened, as a result of which the bearing inner rings are braced with the interposition of a sleeve (13) and fixed in the axial direction. In this version, the bearing arrangement is tensioned via the pulley (8). In washing machines with direct drives (not shown), the bearing is braced via the rotor of the direct drive. To ensure the tensioning path, the length of the tensioning chain is oversized compared to the length of the shaft journal (1). In addition, a clearance Y creates a gap Y between the hub (8a) of the pulley and a contact surface (1a) on the shaft journal (1).
Figur 2 zeigt die Lageranordnung in einem Lagergehäuse (7) als komplett vormontiertes Lagermodul. Dieses Lagermodul kann z. B. beim Einsatz in einer Wäschebehandlungsmaschine mit Kunststofflaugenbehälter komplett vormontiert umspritzt werden. Außerdem kann das Lagermodul auch in Eintrommelwaschmaschinen und Waschmaschinen mit Direktantrieben oder z. B. auch in Wäschetrocknern zum Einsatz kommen. Das gezeigte Modul kann nur die Lageranordnung beinhalten oder um die Wellendichtung (14) erweitert werden.Figure 2 shows the bearing arrangement in a bearing housing (7) as a completely pre-assembled Storage module. This storage module can e.g. B. when used in a laundry treatment machine overmolded completely pre-assembled with plastic tub. Besides, can the storage module also in single drum washing machines and washing machines with direct drives or z. B. can also be used in tumble dryers. The module shown can include only the bearing arrangement or be expanded by the shaft seal (14).
Um eine definierte axiale Vorspannung zu erreichen, welche die Lagerluft in beiden Radialkugellagem (9, 10) auf das minimal zulässige Maß verringert, erfolgt der Einbau der Lager (9, 10) in einem Vormontage-Schritt unter Vorspannung der Innenringe (9a, 10a) mittels einer Hilfsvorrichtung. Nachfolgend wird die Montage der Lageranordnung bzw. des Lagermoduls anhand der Figuren 3a bis 3d für eine Lageranordnung gemäß Figur 1 beschrieben: Das trommelseitige Lager (9) wird mit seinem Außenring (9b) bis zur kreisringförmigen Anschlagfläche (12a) in die Lagergehäuse-Bohrung (11a) eingepresst (Figur 3a). Mittels der Eindrückvorrichtung (17) wird der Innenring (9a) mit einer definierten Kraft gegen den Außenring (9b) zum Zentrum des Lagergehäuses (7) hin vorgespannt und in dieser Position gehalten. Von der antriebsseitigen Montagerichtung aus wird die Hülse (13) beispielsweise auf einem nicht dargestellten Haltedorn in das Lagergehäuse geführt und an den Innenring (9a) angelegt (Figur 3b). Entsprechend einer anderen Montagefolge kann die Hülse (13) auch von der trommelseitigen Montagerichtung vor oder mit Einbau des Lagers (9) eingelegt werden. Das antriebsseitige Lager (10) wird über den Außenring nur so weit in den Lagersitz (11) eingepresst, bis die Lagersitzbreite des Lagers (10) komplett trägt (Figur 3c). Dabei erfolgt gleichzeitig die Vorspannung des Innenrings (10a) gegenüber dem Außenring (10b). Hierzu wird der Innenring (10a) mittels der Eindrückvorrichtung (18) gegenüber dem Außenring (10b) zum Zentrum des Lagergehäuses hin bewegt und ebenfalls vorgespannt. Sobald der Innenring (10a) des Lagers (10) über die Hülse (13) gegen den vorgespannten Innenring (9a) des Lagers (9) drückt, steigt die Andruckkraft gegen den Innenring (10a), welche an der Kraftmesseinrichtung (19) messbar ist, deutlich an und der Montageprozess wird abgebrochen. Bei diesem Montagevorgang stellt sich zwischen dem Außenring (10b) und der Anschlagfläche (12b) der Spalt mit der Spaltweite X (siehe Figur 1) ein. Da der Abstand der Innenringe (9a, 10a) durch die Hülse festgelegt ist und der trommelseitige Außenring an der Anschlagfläche (12a) anliegt, ist das Verspannungsmaß als Verhältnis der Abstände der Außenringe zum Abstand der Innenringe allein durch das Maß der Spaltweite X definiert. Die Länge der Abstandshülse (13) und die Tiefe der Lagergehäuse-Bohrungen (11a, 11b) müssen derart bemessen sein, dass der Spalt bei der Anlage des Innenrings (10a) an der Hülse ein Mindestmaß aufweist, da sonst die gewünschte Vorspannung nicht erreicht werden kann. Die Lagerinnenringe der Lager (9, 10) bilden mit der Hülse (13) in der Hilfsvorrichtung (17, 18) eine vorgespannte Montagekette. Nachdem die Montagevorrichtungen (17, 18) entfernt sind, löst sich die Vorspannung. Die Hülse (13) muss entsprechend in radialer Richtung gesichert werden. Wenn der Wellenzapfen (1) mit der Trommel (3) montiert wird, erfolgt der erneute Aufbau der Verspannungskette durch Anziehen der Schraube (16) an der Riemenscheibe (8).To achieve a defined axial preload, which the bearing clearance in both radial ball bearings (9, 10) reduced to the minimum permitted dimension, the bearings are installed (9, 10) in a pre-assembly step by prestressing the inner rings (9a, 10a) an auxiliary device. The assembly of the bearing arrangement or the bearing module follows described with reference to FIGS. 3a to 3d for a bearing arrangement according to FIG. 1: The drum-side bearing (9) with its outer ring (9b) is annular Stop surface (12a) pressed into the bearing housing bore (11a) (Figure 3a). By means of the Press-in device (17), the inner ring (9a) with a defined force against the Outer ring (9b) biased towards the center of the bearing housing (7) and in this position held. From the drive-side assembly direction, the sleeve (13) is, for example a holding mandrel, not shown, into the bearing housing and to the inner ring (9a) created (Figure 3b). According to another assembly sequence, the sleeve (13) can also by the drum-side assembly direction before or when installing the bearing (9). The drive-side bearing (10) is only so far into the bearing seat (11) via the outer ring pressed in until the bearing seat width of the bearing (10) is fully supported (Figure 3c). This is done at the same time the preload of the inner ring (10a) with respect to the outer ring (10b). For this the inner ring (10a) is pressed against the outer ring (10b) by means of the press-in device (18) moved to the center of the bearing housing and also preloaded. Once the inner ring (10a) of the bearing (10) over the sleeve (13) against the preloaded inner ring (9a) of the Bearing (9) presses, the pressure force increases against the inner ring (10a), which on the force measuring device (19) is measurable, and the assembly process is terminated. at this assembly process arises between the outer ring (10b) and the stop surface (12b) the gap with the gap width X (see Figure 1). Because the distance of the inner rings (9a, 10a) is fixed by the sleeve and the drum-side outer ring on the Stop surface (12a) is the tension measure as a ratio of the distances of the Outer rings to the distance between the inner rings defined solely by the size of the gap width X. The Length of the spacer sleeve (13) and the depth of the bearing housing bores (11a, 11b) must be be dimensioned such that the gap when the inner ring (10a) lies against the sleeve Minimum dimension, otherwise the desired preload cannot be achieved. The Inner bearing rings of the bearings (9, 10) form one with the sleeve (13) in the auxiliary device (17, 18) pre-tensioned assembly chain. After the mounting devices (17, 18) are removed, loosen the bias. The sleeve (13) must be secured accordingly in the radial direction. When the shaft journal (1) is mounted with the drum (3), it is reassembled the tension chain by tightening the screw (16) on the pulley (8).
Claims (9)
- Laundry treating machine, having a detachably mounted drum (3), which is rotatable about a horizontal or inclined axis, two radial ball bearings (9, 10) being loosely and freely seated in a bearing housing (7) with their external rings (9b, 10b) and being axially spaced from each other and with their internal rings (9a, 10a) accommodating a shaft journal (1) which is connected to the drum, characterised in that the internal rings (9a, 10a) of both radial ball bearings (9, 10) in the installed position are loosely and freely seated relative to the shaft journal (1) and disposed so as to be tensioned in an axially defined manner relative to the external rings (9b, 10b).
- Laundry treating machine according to claim 1, characterised in that a securement of the internal rings (9a, 10a) of both radial ball bearings (9, 10) on the shaft journal (11) is effected with a snug fit and by tensioning by means of a spacer sleeve (13), which is disposed concentrically relative to the shaft journal (1), by the action of an external axially acting compression force.
- Laundry treating machine according to claim 1 or 2, characterised in that the axially initially tensioned securement of the internal rings (9a, 10a) on the shaft journal (1) is effected by a tensioning chain, which is constructed between the base (3a) of the drum (3) and a screw (16) for securing a belt pulley (8) or a direct-drive rotor and comprises a bearing ring (14a) of a shaft seal (14), the internal rings (9a, 10a) themselves, the sleeve (13) and the belt pulley (8) or the direct-drive rotor.
- Laundry treating machine according to at least one of claims 1 to 3, characterised in that the tolerance fields of the internal rings (9, 10) and the tolerance fields of the shaft journal (1) are selected so that internal rings and shaft journal (1) form a clearance-fit.
- Laundry treating machine according to at least one of claims 1 to 4, characterised in that the initial tension of the internal rings (9a, 10a) of both radial ball bearings (9, 10) is effected in the direction of the bearing housing centre.
- Laundry treating machine according to at least one of claims 1 to 5, characterised in that the tolerance fields of the external rings (9b, 10b) and the tolerance fields of the bearing housing bores (11a, 11b) are selected so that external rings and bores (11a, 11b) form a press-fit.
- Laundry treating machine according to claim 6, characterised in that the length of the spacer sleeve (13) and the depth of the bearing housing bores (11a, 11b) are of such dimensions that a gap (X) is set between the stop face (12a, 12b) of at least one bore (11a) and the external ring (10b) disposed in this bore (11a).
- Laundry treating machine according to claim 7, characterised in that the gap (X) is disposed in the region of the radial ball bearing (10) at the driving end.
- Laundry treating machine according to claims 3 and 8, characterised in that the tensioning chain (8, 9a, 10a, 13, 14) is greater than the length of the shaft journal (1).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19946288 | 1999-09-28 | ||
| DE19946288 | 1999-09-28 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1091037A1 EP1091037A1 (en) | 2001-04-11 |
| EP1091037B1 true EP1091037B1 (en) | 2003-06-18 |
Family
ID=7923475
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP00120913A Expired - Lifetime EP1091037B1 (en) | 1999-09-28 | 2000-09-26 | Machine fo treating laundry having a cantilever-supported drum |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP1091037B1 (en) |
| AT (1) | ATE243275T1 (en) |
| DE (2) | DE50002576D1 (en) |
| ES (1) | ES2197849T3 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102016214817A1 (en) | 2016-08-10 | 2018-02-15 | BSH Hausgeräte GmbH | Bearing arrangement for a suspended laundry drum and laundry treatment machine |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10052586C1 (en) * | 2000-10-24 | 2001-12-13 | Miele & Cie | Front-loading washing machine or washer/dryer has washing drum supported by 2 axially spaced radial ball bearings providing depth adjustment |
| ITTO20130745A1 (en) * | 2013-09-13 | 2015-03-14 | Skf Ab | CANNOTTO COSTAMPABILE WITH WASHING MACHINE TANKS |
| DE102014206634A1 (en) | 2014-04-07 | 2015-10-08 | BSH Hausgeräte GmbH | Bearing assembly and washing machine with a bearing assembly |
| CN114123565B (en) * | 2021-11-01 | 2022-12-20 | 西安航天精密机电研究所 | Limited corner torque motor with rotor free of radial runout |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3199318A (en) * | 1963-02-20 | 1965-08-10 | Eugene B Sullivan | Cleaning machine and seal means therefor |
| DE1460896A1 (en) * | 1965-08-12 | 1969-04-30 | Constructa Werke Gmbh | Washing drum bearing for a washing drum mounted overhung around a horizontal axis in the tub |
| SE361715B (en) * | 1972-11-13 | 1973-11-12 | Skf Ind Trading & Dev | |
| DD153614A1 (en) * | 1980-10-15 | 1982-01-20 | Erich Barth | DRUM BEARING, ESPECIALLY FOR DRUM MACHINES AND CENTRIFUGES |
| DE4422853C2 (en) * | 1994-06-30 | 2003-06-12 | Miele & Cie | Bearing seal for radial rolling bearings |
| US6341507B1 (en) * | 1997-02-17 | 2002-01-29 | Miele & Cie. Gmbh. & Co. | Laundry treating equipment with a driving motor mounted on the drum shaft |
-
2000
- 2000-09-26 ES ES00120913T patent/ES2197849T3/en not_active Expired - Lifetime
- 2000-09-26 DE DE50002576T patent/DE50002576D1/en not_active Expired - Lifetime
- 2000-09-26 EP EP00120913A patent/EP1091037B1/en not_active Expired - Lifetime
- 2000-09-26 AT AT00120913T patent/ATE243275T1/en not_active IP Right Cessation
- 2000-09-26 DE DE10047995A patent/DE10047995A1/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102016214817A1 (en) | 2016-08-10 | 2018-02-15 | BSH Hausgeräte GmbH | Bearing arrangement for a suspended laundry drum and laundry treatment machine |
Also Published As
| Publication number | Publication date |
|---|---|
| ATE243275T1 (en) | 2003-07-15 |
| ES2197849T3 (en) | 2004-01-16 |
| DE50002576D1 (en) | 2003-07-24 |
| EP1091037A1 (en) | 2001-04-11 |
| DE10047995A1 (en) | 2001-03-29 |
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