초록 ▼

In the operation of track-type machines, the pin and bushing assemblies incorporated in the track assemblies are typically lubricated to accommodate wear that occurs as they rotate relative to one another. Since the relative rotation occurs over a relatively small area, there are instances wherein p

In the operation of track-type machines, the pin and bushing assemblies incorporated in the track assemblies are typically lubricated to accommodate wear that occurs as they rotate relative to one another. Since the relative rotation occurs over a relatively small area, there are instances wherein portions of the interface between the pin and bushing never are exposed to the lubricating fluid, thus causing premature wear. The present invention provides a track assembly that has a track bushing that defines a bore that is defined by a plurality of wall segments. The wall segments join one another to define a plurality of cusps that form axially extending channels that extend the axial length of the bushing. The channels maintain a quantity of lubricant during relative rotation of the track pin and bushing to prevent premature wear.

대표청구항 ▼

[ What is claimed is:] [1.] A track assembly, comprising:a first chain portion having a plurality of link members having first and second end portions and being connected together in end-to-end relation to one another;a second chain portion having a plurality of link members having first and second

[ What is claimed is:] [1.] A track assembly, comprising:a first chain portion having a plurality of link members having first and second end portions and being connected together in end-to-end relation to one another;a second chain portion having a plurality of link members having first and second end portions and being connected together in end-to-end relation to one another and being positioned in spaced, parallel relation to the first plurality of link members;a pin member connected to and extending between the respective first end portions of the respective first and second plurality of link members;a bushing member having a bore extending therethrough, said bore being defined by a plurality of axially extending wall segments, said bushing being connected to and extending between the respective second end portions of the respective first and second plurality of link members with the pin member positioned within said bore.