DE1700552U

DE1700552U - GAHAEUSLESS SHAFT SEAL.

Info

Publication number: DE1700552U
Application number: DE1955G0011323
Authority: DE
Original assignee: Goetzewerke Friedrich Goetze AG
Current assignee: Goetzewerke Friedrich Goetze AG
Priority date: 1955-03-18
Filing date: 1955-03-18
Publication date: 1955-06-16

Description

Gegenstand der Neuerung ist eine gehäuselose Wellendichtung, insbesondere zum Abdichten von Kugellagern o.dgl.The object of the innovation is a shaft seal without a housing, in particular for sealing ball bearings or the like.

Die bekannten Wellendichtungen bestehen aus einem Haft-, einem Verbindungs- und einem Lippenteil, wobei der Haftteil in das abzudichtende Gehäuse dichtend eingepreßt wird. Der Haftteil ist entweder von einem Metallgehäuse umgeben oder aber durch einen metallischen Stützring verstärkt, der am Innenumfang des Haftteils anvulkanisiert ist. Derartige Dichtungen haben sich gut bewährt, benötigen aber den der Breite des Haftteils entsprechenden Raum innerhalb des abzudichtenden Teils. Bei der Abdichtung von Kugellagern an Kleinmotoren o.dgl. ist dieser Raum aber nicht immer vorhanden.The known shaft seals consist of an adhesive part, a connecting part and a lip part, the adhesive part being pressed sealingly into the housing to be sealed. The adhesive part is either surrounded by a metal housing or reinforced by a metallic support ring which is vulcanized onto the inner circumference of the adhesive part. Such seals have proven themselves well, but require the space within the part to be sealed that corresponds to the width of the adhesive part. When sealing ball bearings on small motors or the like. but this space is not always available.

Die Neuerung beruht auf der Erkenntnis, daß zur Abdichtung und Zentrierung einer Wellendichtung im Maschinengehäuse nicht unbedingt der dichte Sitz eines Haftteils der Manschette in der Gehäusebohrung erforderlich ist, sondern daß die Dichtwirkung auch dadurch erreicht wird, daß man die Manschette einstückig aus einem Lippenteil und einem dicht zwischen den abzudichtenden Flächen liegenden Rückenteil zusammensetzt. Gemäß der Neuerung wird vorgeschlagen, daß der elastische Rückenteil der Manschette, der einstückig mit dem Lippenteil verbunden ist, mit einer nahezu bis in die Dichtlippe ragenden, mit ihrem Außendurchmesser die Dichtung zentrierenden Blechscheibe zusammenvulkanisiert ist. Die Dichtlippe sitzt also an einer Gummi-Ringscheibe, die einen Belag auf einer Blech-Ringscheibe bildet. Die Blechscheibe wird durch das abzudichtende Kugellager o.dgl. seitlich an die Gehäusewand gepreßt, während die Zentrierung am Außenumfang der Blechscheibe erfolgt. Die Blechscheibe und der elastische Rückenteil können relativ dünn sein, so daß sie nur wenig Raum einnehmen. Vorteilhafterweise sind die Blechscheibe und der Manschetten-Rückenteil am Außenumfang abgebogen, damit eine Freigängigkeit gegenüber der Abrundung innerhalb des Gehäuses vorhanden ist. Auch wird dadurch die Steifigkeit der Scheibe erhöht.The innovation is based on the knowledge that sealing and centering a shaft seal in the machine housing does not necessarily require a tight fit of an adhesive part of the sleeve in the housing bore, but that the sealing effect is also achieved in that the sleeve is made in one piece from a lip part and a back part lying tightly between the surfaces to be sealed. According to the innovation it is proposed that the elastic back part of the cuff, which is integrally connected to the lip part, is vulcanized together with a sheet metal disc which projects almost into the sealing lip and centers the seal with its outer diameter. The sealing lip is seated on a rubber washer which forms a coating on a sheet metal washer. The sheet metal disc is through the ball bearing to be sealed or the like. pressed against the side of the housing wall, while the centering takes place on the outer circumference of the sheet metal disc. The sheet metal disc and the elastic back part can be relatively thin, so that they take up little space. The sheet metal disk and the cuff back part are advantageously bent at the outer circumference so that there is freedom of movement with respect to the rounding inside the housing. This also increases the rigidity of the disk.

Um nicht am Innenring des Lagers zu schleifen, ist die Blechscheibe im Bereich des Innenumfangs vorteilhafterweise in Richtung zur Dichtlippe hin gekröpft. Die neuerungsgemäße Wellendichtung ist besonders platzsparend und billig in der Herstellung, da die Bearbeitung der äußeren Sitzfläche entfällt.In order not to rub against the inner ring of the bearing, the sheet metal disk is advantageously cranked in the area of the inner circumference in the direction of the sealing lip. The shaft seal according to the innovation is particularly space-saving and inexpensive to manufacture, since the outer seat surface does not have to be machined.

In der Zeichnung ist die Wellendichtung an einem Ausführungsbeispiel dargestellt:In the drawing, the shaft seal is shown in an exemplary embodiment:

Die auf der Welle 1 sitzende, durch die Ringwendelfeder 2 belastete Dichtlippe 3 ist mit ihrem Rückenteil 4 mit der Blechscheibe 5 durch Vulkanisation verbunden. An ihrem Außenumfang 6 ist sie in Richtung zu dem Außenring 7 des Kugellagers abgebogen, um eine einwandfreie Zentrierung zu gewährleisten und nicht mit der Rundung des Gehäuseteils 8 in Berührung zu kommen. Am Innenumfang 9 ist die Blechscheibe 5 gekröpft, um nicht am Innenring 10 des Lagers anzuliegen.The sealing lip 3 seated on the shaft 1 and loaded by the helical spring 2 is connected with its back part 4 to the sheet metal disk 5 by vulcanization. On its outer circumference 6, it is bent in the direction of the outer ring 7 of the ball bearing in order to ensure perfect centering and not to come into contact with the rounding of the housing part 8. The sheet metal disk 5 is cranked on the inner circumference 9 so that it does not rest on the inner ring 10 of the bearing.

Claims

1.) Housing-less shaft seal, in particular for sealing ball bearings or the like., With an elastic sealing lip, possibly loaded by a helical spring, and a back part, characterized in that the back part with a seal extending almost into the sealing lip and with its outer diameter centering sheet metal disc is vulcanized together.

2.) Shaft seal according to claim 1, characterized in that the sheet metal disc and the sleeve back part are bent on the outer circumference.

3.) Shaft seal according to claims 1 and 2, characterized in that the sheet metal disc is cranked towards the sealing lip in the region of the inner circumference.

drawing

Write to

New description

The object of the innovation is a shaft seal without a housing, in particular for sealing ball bearings or the like.

The known shaft seals consist of an adhesive part, a connecting part and a lip part, the adhesive part being pressed sealingly into the housing to be sealed. The adhesive part is either surrounded by a metal housing or reinforced by a metallic support ring which is vulcanized onto the inner circumference of the adhesive part. Such seals have proven themselves well, but require the space within the part to be sealed that corresponds to the width of the adhesive part. When sealing ball bearings on small motors or the like. but this space is not always available.

The innovation is based on the knowledge that sealing and centering a shaft seal in the machine housing does not necessarily require a tight fit of an adhesive part of the sleeve in the housing bore, but that the sealing effect is also achieved in that the sleeve is made in one piece from a lip part and a back part lying tightly between the surfaces to be sealed. According to the innovation, it is proposed that the elastic back part of the cuff, which is integrally connected to the lip part, vulcanized together with a sheet metal disc which projects almost into the sealing lip and centers the seal with its outer diameter and is bent with this outside. The sealing lip is seated on a rubber washer which forms a coating on a sheet metal washer. The sheet metal disc is through the ball bearing to be sealed or the like. pressed against the side of the housing wall, while the centering takes place on the outer circumference of the sheet metal disc. The sheet metal disc and the elastic back part can be relatively thin so that they take up little space. The sheet metal washer and the cuff back part are bent together on the outer circumference so that there is freedom of movement with respect to the rounding inside the housing. This also increases the rigidity of the disk.

In order not to rub against the inner ring of the bearing, the sheet metal disk is advantageously cranked in the area of the inner circumference in the direction of the sealing lip. The shaft seal according to the innovation is particularly space-saving and inexpensive to manufacture, since the outer seat surface does not have to be machined.

In the drawing, the shaft seal is shown in one embodiment.

The sealing lip 3 seated on the shaft 1 and loaded by the helical spring 2 is connected with its back part 4 to the sheet metal disk 5 by vulcanization. On its outer circumference 6, it is bent in the direction of the outer ring 7 of the ball bearing in order to ensure perfect centering and not to come into contact with the rounding of the housing part 8. The sheet metal disk 5 is cranked on the inner circumference 9 so that it does not rest on the inner ring 10 of the bearing.

New protection claims

1. Housing-less shaft seal, in particular for sealing ball bearings or the like., With an elastic sealing lip, optionally loaded by a helical spring, and a back part, characterized in that the back part with a protruding almost into the sealing lip and centering the seal with its outer diameter Sheet metal disk is vulcanized together and bent with this on the outer circumference.

2. Shaft seal according to claim 1, characterized in that the sheet metal washer is cranked towards the sealing lip in the region of the inner circumference.