A track link structure has an outer surface and an inner surface. The track link structure includes a first mainbody and a second mainbody. The first mainbody includes a first track link portion and a first connecting portion. The first track link portion includes a first shaft hole. The first connecting portion includes a first inclined plane structure and a first connecting structure. The second mainbody includes a second track link portion and a second connecting portion. The second track link portion includes a second shaft hole. The second connecting portion includes a second inclined plane structure and a second connecting structure. The first connecting portion is correspondingly connected to the second connecting portion so as to assemble the first mainbody and the second mainbody to form the track link structure.

A track chain assembly includes a track pin, a first link, and a second link. The first link defines a first pair of pin passages in spaced relationship to each other by a first link pitch. The first link is mounted to the track pin such that the track pin extends through one of the first pair of pin passages. The second link defines a second pair of pin passages in spaced relationship to each other by a second link pitch. The second link is mounted to the track pin such that the track pin extends through one of the second pair of pin passages and such that the first link and the second link are rotatable with respect to each other about a longitudinal axis defined by the track pin. The second link pitch is greater than the first link pitch in a range up to twice the first link pitch.

A master link joint for a drive chain is disclosed. The disclosed master link joint includes two master links. Each master link includes a first half link and a second half link that engage each other along mating abutment surfaces. The two master links are disposed on opposite sides of the chain. The first half links are coupled by a pin that traverses the chain and the second half links are coupled by a bushing that traverses the chain. The mating abutment surfaces include a first ramp that meets a second offset ramp at a junction or root. An angle defined by the second ramps of the mating abutment surfaces and a line parallel to the rail or bottom pad of the half links ranges from about 45 to about 53.

A method of fabricating a track link comprises creating a rail portion of a track link from a high alloy steel, creating a main body portion of a track link from a low alloy steel, and friction adhering the rail portion onto the main body portion.

A track assembly for a machine comprising track pads with a ground engaging surface opposite link engaging surfaces and a lug protruding between the link engaging surfaces. The track assembly includes pairs of links disposed on the link engaging surfaces of the track pads. The pairs of links include an outer link having an outer bushing end and an outer pin end, and an inner link spaced-apart from the outer link. The inner link has an inner bushing end and an inner pin end. A distance between the inner bushing ends and the outer bushing ends is less than a distance between the inner pin ends and the respective outer pin ends. The track assembly includes pins connecting the bushing ends of pairs of links to the pin ends of adjacent pairs of links forming endless chains. The endless chains connect adjacent track pads in an endless loop.

A method for manufacturing a machine component includes forming a non-linear break notch in a workpiece, freezing the workpiece, and snapping the frozen workpiece apart along the non-linear break notch.

A crawler belt coupling apparatus includes a first crawler belt link, a second crawler belt link, a master pin, a locking pin, and a snap ring. The master pin is inserted in first and second through holes. The master pin is provided with an insertion hole. The locking pin is press fitted into the insertion hole, and has both ends projecting relative to the master pin. The snap ring has a C-like shape, has an outer diameter larger than the first through hole, is disposed opposite to the second crawler belt link relative to the first through hole, and is attached to the master pin. The groove has a width smaller than a diameter of the master pin. The locking pin is disposed in the groove.

A track link assembly for a ground-engaging track includes a plurality of track links in a track chain and having a master link with a first half link and a second half link. The first half link includes a first clamping surface having a first tooth set, and the second half link includes a second clamping surface having a second tooth set. The first clamping surface includes a link lateral width transition defining a first stress concentration location, and a slope gradient transition defining a second stress concentration location and spaced from the link lateral thickness transition. Separating curved transitions of the clamping surface limits overlapping and/or additive stresses to improve field service and breakage resistance of the master link.

A track link may include two end portions including a pin bore and a bushing bore, both the pin bore and the bushing bore extending between an inner surface and an outer surface of the track link, and a central portion, in between the two end portions. The central portion may include a strut extending at least partially along a central axis of the central portion of the track link, at least two windows extending between the outer surface and the inner surface of the track link, each window being defined in part by the strut, and a dimple on at least one of the outer surface and inner surface, the dimple being located along the central axis of the central portion of the track link and in between the at least two windows.

A track pin assembly includes a pin having a first axial end and a second axial end configured to engage a respective outer link of a joint, a first cavity which defines a tank for containing lubricating oil or grease, and a second cavity arranged at the second axial end of the pin and open at the second axial end of the pin. A sensor, arranged in the second cavity, includes a sensor element configured to measure a temperature and to generate a signal indicative of the measured temperature, and a transmitter configured to irradiate a measuring signal that is representative of the signal generated by the sensor element. A power source, arranged in the second cavity, is configured to constantly supply the sensor.