A track system for traction of a vehicle (e.g., an agricultural vehicle) in which the track system is designed to enhance traction and/or ride quality (e.g., reduce vibrations), when travelling on a soft and/or uneven ground area (e.g., an agricultural field) and/or when roading, by providing an improved suspension functionality (e.g., with plural articulations and resilient effects).

A track system for traction of a vehicle (e.g., an agricultural vehicle) in which the track system is designed to enhance traction and/or ride quality (e.g., reduce vibrations), when travelling on a soft and/or uneven ground area (e.g., an agricultural field) and/or when roading, by providing an improved suspension functionality (e.g., with plural articulations and resilient effects).

An undercarriage assembly for a work machine including a drive wheel; front and rear idler wheels; an endless track belt about the drive and idler wheels; mid-rollers located between the front and rear idler wheels to engage the endless track belt; a track roller frame mounted on the machine at a main pivot, between front and rear ends of an elongate member, with the front idler wheel connected near the front end of the roller frame; a major bogie connected to the roller frame at a major bogie pivot, and the rear idler wheel connected to a trailing arm of the major bogie; a minor bogie, mounted on a forward arm of the major bogie, and pivotably connected to the major bogie at a minor bogie pivot, and including front and rear axles, supported by a suspension that provides damping between the front and rear axles and the minor bogie pivot.

An undercarriage assembly for a work machine including a drive wheel; front and rear idler wheels; an endless track belt about the drive and idler wheels; mid-rollers located between the front and rear idler wheels to engage the endless track belt; a track roller frame mounted on the machine at a main pivot, between front and rear ends of an elongate member, with the front idler wheel connected near the front end of the roller frame; a major bogie connected to the roller frame at a major bogie pivot, and the rear idler wheel connected to a trailing arm of the major bogie; a minor bogie, mounted on a forward arm of the major bogie, and pivotably connected to the major bogie at a minor bogie pivot, and including front and rear axles, supported by a suspension that provides damping between the front and rear axles and the minor bogie pivot.

Track system for a vehicle having a chassis and a drive shaft extending laterally outwardly from the chassis includes: An attachment assembly having a leading pivot and a trailing pivot. A multi-member frame assembly including: a leading frame member pivotably connected to the attachment assembly via the leading pivot for pivoting about a leading pivot axis; a trailing frame member pivotably connected to the attachment assembly via the trailing pivot for pivoting about a trailing pivot axis; a leading wheel-bearing frame member at least indirectly pivotably connected to the leading frame member; a trailing wheel-bearing frame member at least indirectly pivotably connected to the trailing frame member. A damper interconnecting the leading frame member and the trailing frame member. A leading idler wheel assembly; a trailing idler wheel assembly; support wheel assemblies; a gearbox; a sprocket wheel; and an endless track.

A track roller includes a body having an annular configuration defining an axis of rotation, a radial direction, and a circumferential direction disposed about the axis of rotation. The body also defines a thru-hole extending axially through the body that is centered on the axis of rotation. A blind void is disposed annularly about the axis of rotation, the blind void being spaced radially away from the thru-hole a predetermined minimum distance, forming a cantilever portion defining a flex point and a flex radial distance measured radially from the flex point to the thru-hole.

A track roller includes a body having an annular configuration defining an axis of rotation, a radial direction, and a circumferential direction disposed about the axis of rotation. The body also defines a thru-hole extending axially through the body that is centered on the axis of rotation. A blind void is disposed annularly about the axis of rotation, the blind void being spaced radially away from the thru-hole a predetermined minimum distance, forming a cantilever portion defining a flex point and a flex radial distance measured radially from the flex point to the thru-hole.

An idler assembly includes a hub defining an axis of rotation, a radial direction, and a circumferential direction, and a stepped circumferential surface having a first radially inner face, and a radially outer circumferential surface, forming a raised ridge portion. The radially outer circumferential surface defines an outer diameter, and the first radially inner face defines an inner diameter. A ratio of the outer diameter to the inner diameter ranges from 1.06 to 1.28.

An idler assembly includes a hub defining an axis of rotation, a radial direction, and a circumferential direction, and a stepped circumferential surface having a first radially inner face, and a radially outer circumferential surface, forming a raised ridge portion. The radially outer circumferential surface defines an outer diameter, and the first radially inner face defines an inner diameter. A ratio of the outer diameter to the inner diameter ranges from 1.06 to 1.28.

A track chain assembly comprises a plurality of interlocking track chain members wherein each track chain member defines a track chain traveling direction, a lateral direction perpendicular to the track chain traveling direction, and includes a shoe member defining a shoe width along the lateral direction; and a first track pad member defining a first track pad maximum width along the lateral direction, and a second track pad member defining a second maximum track pad width along the lateral direction, wherein a ratio of either track pad maximum widths to the shoe member width ranges from 1:4 to 3:4. The first and the second track pad members each include a first projection disposed at one lateral extremity of the first track pad member and a second projection disposed at another lateral extremity of the second track pad member.