Seal Assembly for Track Pin Joint Assembly of Undercarriage

摘要

A track pin joint assembly includes a pin, a first link, a second link pivotable with respect to the first link about the pin, and a seal assembly. The seal assembly includes a seal ring, a load ring, and a seal lip. The load ring is mounted to the seal ring and is sealingly engaged with the first link. The seal lip is connected to the second link such that the seal lip circumscribes the pin passage of the second link and extends axially from the second link toward the seal ring. The seal lip is in sealing contact with the radial flange of the seal ring.

主权项

1. A track pin joint assembly comprising:
a pin, the pin defining a longitudinal axis; a first link and a second link, the first link and the second link each defining a pin passage receiving the pin therein, the first link being pivotable about the longitudinal axis with respect to the second link, the first link including a load ring engagement surface defining, at least in part, a seal cavity disposed in proximal relationship to the second link; and a seal assembly, the seal assembly disposed in the seal cavity and sealingly disposed between the first link and the second link, the seal assembly comprising:
a seal ring, the seal ring being annular and having an axial flange extending along the longitudinal axis and a radial flange extending along a radial plane perpendicular to the longitudinal axis,a load ring, the load ring being annular and including a seal ring engagement surface and a first link engagement surface, the seal ring engagement surface including an axial segment and a radial segment in engaging relationship with the axial flange and the radial flange of the seal ring, respectively, and the first link engagement surface in engaging relationship with the load ring engagement surface of the first link, anda seal lip, the seal lip being annular and connected to the second link such that the seal lip circumscribes the pin passage and extends axially from the second link toward the seal ring, and the seal lip being in sealing contact with the radial flange of the seal ring.