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.

The invention discloses a track element (80) for forming a continuous over tyre track (100), includes a generally C-shaped rigid member (10) having a base portion (10a) extending transversely to the track (100), a tapered side guide member (10b) on each end of the base portion (10a), and at least one inter-engaging connector member (10c) on each side of the base portion (10a); wherein the rigid member (10) is encased in a coating of elastomeric material (20).

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.

A radio-controlled vehicle having a frame, a left undercarriage and a right undercarriage; wherein the frame has a front guide and a rear guide, each configured to house a respective cylinder; each undercarriage having a front slide and a rear slide, which are connected in a sliding manner to the front guide and to the rear guide, respectively; wherein each cylinder is configured to selectively vary the distance between the longitudinal axis of the frame and the longitudinal axis of each undercarriage; wherein each undercarriage comprises an anti-derailment plate.

A track chain assembly includes at least one track link having a shelf extending laterally from the a side surface and including a support surface spaced away from the top surface a predetermined distance measured perpendicularly to the top surface.

A track link for a ground-engaging track system includes an elongate link body having an upper rail surface located in part upon each of a first link strap, a second link strap, and a middle section of the track link. The upper rail surface is formed by a wear band of sacrificial wear material having a hardness that is varied lengthwise along the upper rail surface to retard scalloping of the track link during service and forming relatively softer zones in the first and second link straps and a relatively harder zone within the middle section. Methodology for making such a track link is also disclosed.

A track section (1) adapted to be linked to a plurality of similar track sections to form a track belt for mounting around the outer periphery of vehicle tyres. The track section comprises a crossbar (11) and two lateral support members (126a, 12b). The crossbar is lattice-like and formed by two or more flat, upright and elongated crossbar elements (16) and two or more connecting elements (17). The crossbar elements (16) extend in parallel with each other and empty spaces are provided between them. Each connecting element (17) extends across and is fixed to the crossbar elements (16) in order to act as a spacer between the crossbar elements. Each connecting element (17) projects from the crossbar elements (16) on the outer side (14) of the crossbar (11).

A track component for use with a track assembly includes a gyro sensor that monitors a track wrap angle of the track chain assembly about the idler wheel, or the drive sprocket.

A track system for hobby robotics is provided. The track system includes a first track component having a pair of lateral edges and a connection portion disposed at each lateral edge. The track system also includes a second track component having a pair of lateral edges and a connection portion disposed at each lateral edge. The first track component is hingedly coupled to the second track component at a respective connection portion of each of the first and second track components. An individual track component is also provided.

A track shoe assembly is described that comprises a drive lug part and a track shoe body including a drive lug cavity configured to receive the drive lug part. The drive lug part has at least one lug portion protruding in a first direction, and at least one supporting protrusion extending in a direction substantially opposite to the first direction. The at least one supporting protrusion is configured to be receivable in a drive lug cavity formed in a track shoe such that a load applied to the drive lug part is at least partially transferred to the track shoe.