Sealing arrangement
AssigneeZahnradfabrik Friedrichshafen AG
InventorJosef R. Katzensteiner
Life of this patent
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Abstract
The invention concerns a sealing arrangement for use in steered axles of vehicles employed in agriculture and/or the building trade. The sealing arrangement (24) consists of separate seals (46, 47) which are assembled into a sealing set (48) by way of a sleeve (42). The sleeve (42) is firmly situated in relation to the component (25) to be sealed such as the drive shaft (26) of a steered axle (1). Steering movements departing from the straight ahead drive position produce a displacement of the sealing arrangement (24) from the outer space (21) in a direction toward the inner space (20) of the axle tube (3) of the axle (1).
Claims23
A sealing assembly (24) having a plurality of seals (46, 47) for sealing a rotatable and linear movable component (25) in combination with a steered axle (1) of a vehicle having a movable component (25) being passed through both an axle tube (3) and an outer space (21) to an end output housing (15) for facilitating driving of a vehicle, said sealing assembly (24) being suitable for use in one of an agriculture and a building trade and comprising:
- an outer bushing (38) having a bore extending therethrough which defines an inner bore surface, and a sleeve (42) being accommodated within said bore;
- and
- one of said plurality of seals is a shaft sealing ring (47) having two sealing lips (52) and a second of said plurality of seals is a scraper (46) having at least one scraping lip (49), and said plurality of seals (46, 47) being assembled into a sealing set (48);
- wherein an inner surface of said sleeve (42) is firmly secured to the movable component (25) and an exterior surface of said bushing (38) is firmly secured to the axle tube (3);
- said sealing set (48) is supported by the outer surface of said sleeve (42) and completely spans an annular space located between the inner bore surface of said bushing (38) and the outer surface of said sleeve (42) for sealing said annular space, and said sealing and scraping lips (52, 49) of said sealing set (48) sealing abut against the inner surface of said bushing (38) in a manner such that the sealing and scraping functions of the seals are combined, whereby, upon introduction of a steering movement of the movable component (25) during operation of the vehicle incorporating said sealing assembly (24), said sleeve (42) and said sealing set (48) are displaced to and fro along the inner bore surface of said bushing (38) from a first end of said busing (38) located adjacent the outer space (21) toward an opposed end of said bushing (38) located adjacent an inner space (20), and a longitudinal distance between said scraping lip (49) and an adjacent one of said two sealing lips (52) of said shaft sealing ring (47), in relation to a longitudinal direction of said movable component (25), is greater than a longitudinal travel distance of said movable component (25) such that no overlap occurs between respective longitudinal paths of travel of said sealing lips (52) and said scraping lips (49).
A sealing assembly (24), having a plurality of seals (46, 47), in combination with a rotatable and linear movable component (25) of a steered axle (1) of a vehicle, said sealing assembly (24) sealing said movable component (25) with respect to an axle tube (3), the movable component (25) being passed through the axle tube (3) and an outer space (21) to an end output housing (15) for facilitating driving of a vehicle;
- wherein said sealing assembly (24) comprises an outer bushing (38) which accommodates a sleeve (42) therein;
- one of said plurality of seals is a shaft sealing ring (47) having two sealing lips (52) and a second of said plurality of seals is a scraper (46) having at least one scraping lip (49), and said plurality of seals (46, 47) are assembled into a sealing set (48);
- an inner surface of said plurality of seals (46, 47) is firmly secured to and supported by an outer surface of said sleeve (42), said sleeve (42) is firmly secured to an outer radial surface of the movable component (25), said plurality of seals (46, 47) span an annular space defined between said bushing (38) and said sleeve (42) and abut against an inner surface of said bushing (38) via said sealing and scraping lips (52, 49) for cooperatively sealing said annular space, and said bushing (38) is firmly secured to an inner surface of the axle tube (3) of the vehicle;
- and
- said sealing set (48) and said sleeve (42), upon operation of the vehicle incorporating said sealing arrangement (24) and upon introduction of steering movement to the movable component (25), are displaced to and fro along the inner surface of said bushing (38) from an end of said bushing located adjacent said outer space (21) to an opposed end of said bushing located adjacent an inner space (20), and a longitudinal distance between said sealing lips (52) and said scraping lip (49), in relation to a longitudinal direction of said movable component (25), is greater than a longitudinal travel distance of said movable component (25) such that no overlap occurs between respective longitudinal paths of travel of said sealing lips (52) and said scraping lips (49).
A sealing assembly (24) having a plurality of seals (46, 47) for sealing a rotatable and linear movable component (25) of a steered axle (1) of a vehicle passed through both an axle tube (3) and an outer space (21) to an end output housing (15) for facilitating driving of a vehicle, said sealing assembly (24) being suitable for use in one of an agriculture and a building trade and comprising:
- an outer bushing (38) having a bore extending therethrough which defines an inner bore surface, and a sleeve (42) being accommodated within said bore;
- and
- one of said plurality of seals is a shaft sealing ring (47) having two sealing lips (52) and a second of said plurality of seals is a scraper (46) having at least one scraping lip (49), and said plurality of seals (46, 47) being assembled into a sealing set (48);
- wherein an inner surface of said sleeve (42) is firmly securable to the movable component (25) and an exterior surface of said bushing (38) is firmly securable to the axle tube (3);
- said sealing set (48) is supported by an outer surface of said sleeve (42) and completely spans an annular space located between the inner bore surface of said bushing (38) and the outer surface of said sleeve (42) for sealing said annular space, and said sealing and scraping lips (52, 49) of said sealing set (48) sealing abut against the inner bore surface of said bushing (38) in a manner such that the sealing and scraping functions of the seals are combined, whereby, when said sealing assembly is incorporated in the steered axle of the vehicle and the inner surface of said sleeve (42) is firmly secured to the movable component (25) and an exterior surface of said bushing (38) is firmly secured to the axle tube (3) and upon introduction of a steering movement of the movable component (25) during operation of the vehicle incorporating said sealing assembly (24), said sleeve (42) and said sealing set (48) are displaced to and fro along the inner surface of said bushing (38) from a first end of said bushing (38) located adjacent the outer space (21) toward an opposed end of said bushing (38) located adjacent an inner space (20), and a longitudinal distance between said scraping lip (49) and an adjacent one of said two sealing lips (52) of said shaft sealing ring (47), in relation to a longitudinal direction of said movable component (25), is greater than a longitudinal travel distance of said movable component (25) such that no overlap occurs between respective longitudinal paths of travel of said sealing lips (52) and said scraping lips (49).
Dependencies are inferred from the claim text.