TRACK BUSHING ASSEMBLY AND METHOD

摘要

A track bushing (16) for use with a track assembly of a track-type machine includes a generally cylindrical member having ends (24, 26) adapted for mounting in opposing end portions (20) of a track link (12) and a longitudinal bore (28) extending between the ends (24, 26). The inner surface (30) of the bore defines first and second load bearing portions (40, 42) at each of the ends (24, 26). Each of the first load bearing portions (40) define a first conical surface tapering radially inward from each of the ends (24, 26) at a first angle, and each of the second load bearing portions (42) define a second conical surface tapering radially inward from each of the first conical surfaces at a second angle. In the bushing's assembled state, the first angle is in the range of 0.09 degrees to 0.18 degrees and the second angle is in the range of -.01 degrees to 0.01. In the bushing's free state, the first angle is in the range of 0.19 degrees to 0.27 degrees and the second angle is in the range of 0.06 degrees to 0.08 degrees.