A track link rail surface and roller interface includes a first roller including a cylindrical configuration defining a radial direction, a longitudinal axis, a circumferential direction, and a plane containing the radial direction and the longitudinal axis. The first roller includes a first track link rail engaging surface including a first concave arcuate surface defining a first concave radius of curvature. The interface includes a first track link including a first track link rail surface including a first convex arcuate surface defining a first convex radius of curvature that is less or equal to the first concave radius of curvature.

State of art techniques utilize active systems for stronger suction in surface crawlers while the passive approaches have limitation in providing consistent grip while moving across curved surfaces or dents. Embodiments herein provide an autonomous surface crawling robot for crawling over surfaces using electro-mechanical assembly for creating strong suction force and enabling the robot to smoothly crawl over flat surfaces, horizontal/vertical/inclined surfaces, curved surfaces, and surfaces with dents. Battery powered motors are used for only mobilization, while mechanical assembly generates suction to provide consistent grip across different type of surfaces. A dual flexible cam profile assembly including a cam profile and a guide rail generates required suction and addresses the technical challenge of maintaining suction across varying surfaces without using external power for suction generation. The dual flexible cam profile provides a robust, less prone to error or slippage type passive crawler mechanism, with consistent grip across uneven the surface.

A track shoe for an endless track assembly has a base and an opposing hull. The hull of the track shoe has opposing sidewalls that are angled to meet at an apex, thus forming an inverted V-shape. The apex of the hull extends the width of the track shoe. Laterally-disposed ridges are spaced apart from the apex. and the height of the ridges tapers outwardly from the hull to form, respectively, a leading lip and a trailing lip of the track shoe. The track shoe may have upward bends at the ends of the width of the track shoe and optionally, may have secondary hulls.

A track shoe for an endless track assembly has a base and an opposing hull. The hull of the track shoe has opposing sidewalls that are angled to meet at an apex, thus forming an inverted V-shape. The apex of the hull extends the width of the track shoe. Laterally-disposed ridges are spaced apart from the apex. and the height of the ridges tapers outwardly from the hull to form, respectively, a leading lip and a trailing lip of the track shoe. The track shoe may have upward bends at the ends of the width of the track shoe and optionally, may have secondary hulls.

A work machine includes an undercarriage assembly. The undercarriage assembly includes a chassis and a ground-engaging mechanism for rotating around the chassis to move the work machine. A pair of rails is coupled to the chassis. A pair of sliders is coupled to a front-assembly. The sliders are aligned with the rails and movable relative to the rails to facilitate movement of the front-end assembly relative to the chassis.

A ground-engaging track system includes a track having a first track chain and a second track chain, and an idler having pockets formed in an outer idler rim to receive inboard rail protrusions on track links in the first track chain and the second track chain. The inboard rail protrusions project from an inboard link side, and a central pad of an upper rail surface in the track link includes an anti-scalloping bump-out formed on the inboard rail protrusion.

A technique for steering a tracked vehicle includes controllably deforming at least a portion of a vehicle's track into a curved shape, causing the vehicle to follow a curve-shaped path as it drives. As the vehicle naturally tends to follow a curved path defined by the track's curvature, steering is accomplished with greatly reduced skidding against the ground.

A track pad may include a base member and a roller path member extending from the base member. The roller path member may include a roller path surface for engaging with a roller of a machine. The roller path member may include a leading side and a trailing side in a direction of travel of the machine. The roller path member may include a hardened region that extends from the roller path surface and a body region adjacent the hardened region. The hardened region may have a greater hardness than the body region. The hardened region may have a uniform depth from the leading side to the trailing side of the roller path member.

A track pad may include a base member and a roller path member extending from the base member. The roller path member may include a roller path surface for engaging with a roller of a machine. The roller path member may include a leading side and a trailing side in a direction of travel of the machine. The roller path member may include a hardened region that extends from the roller path surface and a body region adjacent the hardened region. The hardened region may have a greater hardness than the body region. The hardened region may have a uniform depth from the leading side to the trailing side of the roller path member.

A ground-engaging track system includes a track roller frame, an idler, and anti-backbending rollers supported by the track roller frame at locations between track rollers and the idler. The anti-backbending rollers define an idler space receiving the idler partially therein and positioned to oppose backbending of a deflection-sensitive section of a ground-engaging track.