Seal assembly for track pin joint assembly of undercarriage

摘要

A seal assembly can be incorporated into a track pin cartridge assembly of an undercarriage of a track-type machine. The seal assembly can include a pin defining a longitudinal axis and first and second members both coaxial with the pin about the longitudinal axis. The first member is pivotable about the longitudinal axis with respect to the second member and includes a load ring engagement surface defining a seal cavity disposed in proximal relationship to the second member. A seal assembly, including a seal ring and a load ring, is disposed in the seal cavity and sealingly engages the first and second members. A radial segment of a first member engagement surface of the load ring is radially offset, measured along a radial axis perpendicular to the longitudinal axis, from a radial segment of a seal ring engagement surface of the load ring.

主权项

1. A seal assembly adapted for use in sealing a joint having a first member pivotable about a rotational axis relative to a second member thereof, the first member including a load ring engagement surface defining, at least in part, an axially-extending seal cavity about the rotational axis, the seal assembly comprising:
a seal ring, the seal ring having an axial flange, extending along the rotational axis, and a radial flange, extending along a radial axis perpendicular to the rotational axis; and a load ring, the load ring including a seal ring engagement surface, a first member engagement surface, an inner relief surface, and an outer relief surface, the seal ring engagement surface including a radial segment in proximate relationship with the radial flange of the seal ring and an axial segment in proximate relationship with the axial flange of the seal ring, the first member engagement surface including a radial segment and an axial segment, the radial segment of the first member engagement surface being in distal relationship with the radial segment of the seal ring engagement surface, the inner relief surface extending between the radial segment of the first member engagement surface and the axial segment of the seal ring engagement surface, and the outer relief surface extending between the axial segment of the first member engagement surface and the radial segment of the seal ring engagement surface; wherein the inner relief surface includes an inclined segment which is disposed at an oblique angle with respect to the rotational axis, and the outer relief surface includes an inclined segment which is disposed at an oblique angle with respect to the rotational axis; wherein the radial segment of the first member engagement surface is radially offset, measured along the radial axis, from the radial segment of the seal ring engagement surface.